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* doc/gperf.texi (UPDATED): Correct to be today.

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* doc: Regenerated by doing make in a configured tree.
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@@ -1,13 +1,14 @@
<HTML> <HTML>
<HEAD> <HEAD>
<!-- Created by texi2html 1.56k from gperf.texi on 12 June 2003 --> <!-- This HTML file has been created by texi2html 1.52
from gperf.texi on 13 January 2006 -->
<TITLE>Perfect Hash Function Generator</TITLE> <TITLE>Perfect Hash Function Generator</TITLE>
</HEAD> </HEAD>
<BODY> <BODY>
<H1>User's Guide to <CODE>gperf</CODE> 3.0.1</H1> <H1>User's Guide to <CODE>gperf</CODE> 3.0.2</H1>
<H2>The GNU Perfect Hash Function Generator</H2> <H2>The GNU Perfect Hash Function Generator</H2>
<H2>Edition 3.0.1, 12 June 2003</H2> <H2>Edition 3.0.2, 13 January 2006</H2>
<ADDRESS>Douglas C. Schmidt</ADDRESS> <ADDRESS>Douglas C. Schmidt</ADDRESS>
<ADDRESS>Bruno Haible</ADDRESS> <ADDRESS>Bruno Haible</ADDRESS>
<P> <P>
@@ -20,9 +21,9 @@
<LI><A NAME="TOC3" HREF="gperf.html#SEC3">How to Apply These Terms to Your New Programs</A> <LI><A NAME="TOC3" HREF="gperf.html#SEC3">How to Apply These Terms to Your New Programs</A>
</UL> </UL>
<LI><A NAME="TOC4" HREF="gperf.html#SEC4">Contributors to GNU <CODE>gperf</CODE> Utility</A> <LI><A NAME="TOC4" HREF="gperf.html#SEC4">Contributors to GNU <CODE>gperf</CODE> Utility</A>
<LI><A NAME="TOC5" HREF="gperf.html#SEC5">1. Introduction</A> <LI><A NAME="TOC5" HREF="gperf.html#SEC5">1 Introduction</A>
<LI><A NAME="TOC6" HREF="gperf.html#SEC6">2. Static search structures and GNU <CODE>gperf</CODE></A> <LI><A NAME="TOC6" HREF="gperf.html#SEC6">2 Static search structures and GNU <CODE>gperf</CODE></A>
<LI><A NAME="TOC7" HREF="gperf.html#SEC7">3. High-Level Description of GNU <CODE>gperf</CODE></A> <LI><A NAME="TOC7" HREF="gperf.html#SEC7">3 High-Level Description of GNU <CODE>gperf</CODE></A>
<UL> <UL>
<LI><A NAME="TOC8" HREF="gperf.html#SEC8">3.1 Input Format to <CODE>gperf</CODE></A> <LI><A NAME="TOC8" HREF="gperf.html#SEC8">3.1 Input Format to <CODE>gperf</CODE></A>
<UL> <UL>
@@ -39,7 +40,7 @@
<LI><A NAME="TOC16" HREF="gperf.html#SEC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A> <LI><A NAME="TOC16" HREF="gperf.html#SEC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A>
<LI><A NAME="TOC17" HREF="gperf.html#SEC17">3.3 Use of NUL bytes</A> <LI><A NAME="TOC17" HREF="gperf.html#SEC17">3.3 Use of NUL bytes</A>
</UL> </UL>
<LI><A NAME="TOC18" HREF="gperf.html#SEC18">4. Invoking <CODE>gperf</CODE></A> <LI><A NAME="TOC18" HREF="gperf.html#SEC18">4 Invoking <CODE>gperf</CODE></A>
<UL> <UL>
<LI><A NAME="TOC19" HREF="gperf.html#SEC19">4.1 Specifying the Location of the Output File</A> <LI><A NAME="TOC19" HREF="gperf.html#SEC19">4.1 Specifying the Location of the Output File</A>
<LI><A NAME="TOC20" HREF="gperf.html#SEC20">4.2 Options that affect Interpretation of the Input File</A> <LI><A NAME="TOC20" HREF="gperf.html#SEC20">4.2 Options that affect Interpretation of the Input File</A>
@@ -48,9 +49,9 @@
<LI><A NAME="TOC23" HREF="gperf.html#SEC23">4.5 Options for changing the Algorithms employed by <CODE>gperf</CODE></A> <LI><A NAME="TOC23" HREF="gperf.html#SEC23">4.5 Options for changing the Algorithms employed by <CODE>gperf</CODE></A>
<LI><A NAME="TOC24" HREF="gperf.html#SEC24">4.6 Informative Output</A> <LI><A NAME="TOC24" HREF="gperf.html#SEC24">4.6 Informative Output</A>
</UL> </UL>
<LI><A NAME="TOC25" HREF="gperf.html#SEC25">5. Known Bugs and Limitations with <CODE>gperf</CODE></A> <LI><A NAME="TOC25" HREF="gperf.html#SEC25">5 Known Bugs and Limitations with <CODE>gperf</CODE></A>
<LI><A NAME="TOC26" HREF="gperf.html#SEC26">6. Things Still Left to Do</A> <LI><A NAME="TOC26" HREF="gperf.html#SEC26">6 Things Still Left to Do</A>
<LI><A NAME="TOC27" HREF="gperf.html#SEC27">7. Bibliography</A> <LI><A NAME="TOC27" HREF="gperf.html#SEC27">7 Bibliography</A>
<LI><A NAME="TOC28" HREF="gperf.html#SEC28">Concept Index</A> <LI><A NAME="TOC28" HREF="gperf.html#SEC28">Concept Index</A>
</UL> </UL>
<P><HR><P> <P><HR><P>
@@ -61,7 +62,7 @@
<P> <P>
Version 2, June 1991 Version 2, June 1991
</P>
<PRE> <PRE>
Copyright (C) 1989, 1991 Free Software Foundation, Inc., Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
@@ -86,7 +87,7 @@ using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to the GNU Library General Public License instead.) You can apply it to
your programs, too. your programs, too.
</P>
<P> <P>
When we speak of free software, we are referring to freedom, not When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you price. Our General Public Licenses are designed to make sure that you
@@ -95,14 +96,14 @@ this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things. in new free programs; and that you know you can do these things.
</P>
<P> <P>
To protect your rights, we need to make restrictions that forbid To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights. anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it. distribute copies of the software, or if you modify it.
</P>
<P> <P>
For example, if you distribute copies of such a program, whether For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that gratis or for a fee, you must give the recipients all the rights that
@@ -110,13 +111,13 @@ you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their source code. And you must show them these terms so they know their
rights. rights.
</P>
<P> <P>
We protect your rights with two steps: (1) copyright the software, and We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy, (2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software. distribute and/or modify the software.
</P>
<P> <P>
Also, for each author's protection and ours, we want to make certain Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free that everyone understands that there is no warranty for this free
@@ -125,7 +126,7 @@ want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original that any problems introduced by others will not reflect on the original
authors' reputations. authors' reputations.
</P>
<P> <P>
Finally, any free program is threatened constantly by software Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free patents. We wish to avoid the danger that redistributors of a free
@@ -133,16 +134,16 @@ program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all. patent must be licensed for everyone's free use or not licensed at all.
</P>
<P> <P>
The precise terms and conditions for copying, distribution and The precise terms and conditions for copying, distribution and
modification follow. modification follow.
</P>
<P> <P>
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
</P>
<OL> <OL>
<LI> <LI>
@@ -411,7 +412,7 @@ POSSIBILITY OF SUCH DAMAGES.
<P> <P>
END OF TERMS AND CONDITIONS END OF TERMS AND CONDITIONS
</P>
<H2><A NAME="SEC3" HREF="gperf.html#TOC3">How to Apply These Terms to Your New Programs</A></H2> <H2><A NAME="SEC3" HREF="gperf.html#TOC3">How to Apply These Terms to Your New Programs</A></H2>
@@ -421,14 +422,14 @@ END OF TERMS AND CONDITIONS
possible use to the public, the best way to achieve this is to make it possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms. free software which everyone can redistribute and change under these terms.
</P>
<P> <P>
To do so, attach the following notices to the program. It is safest To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found. the "copyright" line and a pointer to where the full notice is found.
</P>
<PRE> <PRE>
<VAR>one line to give the program's name and an idea of what it does.</VAR> <VAR>one line to give the program's name and an idea of what it does.</VAR>
@@ -452,12 +453,12 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
<P> <P>
Also add information on how to contact you by electronic and paper mail. Also add information on how to contact you by electronic and paper mail.
</P>
<P> <P>
If the program is interactive, make it output a short notice like this If the program is interactive, make it output a short notice like this
when it starts in an interactive mode: when it starts in an interactive mode:
</P>
<PRE> <PRE>
Gnomovision version 69, Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR> Gnomovision version 69, Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR>
@@ -474,13 +475,13 @@ commands you use may be called something other than <SAMP>`show w'</SAMP> and
<SAMP>`show c'</SAMP>; they could even be mouse-clicks or menu items--whatever <SAMP>`show c'</SAMP>; they could even be mouse-clicks or menu items--whatever
suits your program. suits your program.
</P>
<P> <P>
You should also get your employer (if you work as a programmer) or your You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names: necessary. Here is a sample; alter the names:
</P>
<PRE> <PRE>
Yoyodyne, Inc., hereby disclaims all copyright Yoyodyne, Inc., hereby disclaims all copyright
@@ -499,7 +500,7 @@ consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General library. If this is what you want to do, use the GNU Library General
Public License instead of this License. Public License instead of this License.
</P>
<H1><A NAME="SEC4" HREF="gperf.html#TOC4">Contributors to GNU <CODE>gperf</CODE> Utility</A></H1> <H1><A NAME="SEC4" HREF="gperf.html#TOC4">Contributors to GNU <CODE>gperf</CODE> Utility</A></H1>
@@ -536,7 +537,7 @@ added a testsuite.
<H1><A NAME="SEC5" HREF="gperf.html#TOC5">1. Introduction</A></H1> <H1><A NAME="SEC5" HREF="gperf.html#TOC5">1 Introduction</A></H1>
<P> <P>
<CODE>gperf</CODE> is a perfect hash function generator written in C++. It <CODE>gperf</CODE> is a perfect hash function generator written in C++. It
@@ -549,7 +550,7 @@ pair of C functions. These functions determine whether a given
character string <VAR>s</VAR> occurs in <VAR>W</VAR>, using at most one probe into character string <VAR>s</VAR> occurs in <VAR>W</VAR>, using at most one probe into
the lookup table. the lookup table.
</P>
<P> <P>
<CODE>gperf</CODE> currently generates the reserved keyword recognizer for <CODE>gperf</CODE> currently generates the reserved keyword recognizer for
lexical analyzers in several production and research compilers and lexical analyzers in several production and research compilers and
@@ -560,14 +561,14 @@ A paper describing <CODE>gperf</CODE>'s design and implementation in greater
detail is available in the Second USENIX C++ Conference proceedings detail is available in the Second USENIX C++ Conference proceedings
or from <CODE>http://www.cs.wustl.edu/~schmidt/resume.html</CODE>. or from <CODE>http://www.cs.wustl.edu/~schmidt/resume.html</CODE>.
</P>
<H1><A NAME="SEC6" HREF="gperf.html#TOC6">2 Static search structures and GNU <CODE>gperf</CODE></A></H1>
<H1><A NAME="SEC6" HREF="gperf.html#TOC6">2. Static search structures and GNU <CODE>gperf</CODE></A></H1>
<P> <P>
<A NAME="IDX2"></A> <A NAME="IDX2"></A>
</P>
<P> <P>
A <EM>static search structure</EM> is an Abstract Data Type with certain A <EM>static search structure</EM> is an Abstract Data Type with certain
fundamental operations, e.g., <EM>initialize</EM>, <EM>insert</EM>, fundamental operations, e.g., <EM>initialize</EM>, <EM>insert</EM>,
@@ -583,7 +584,7 @@ commands. Search set members, called <EM>keywords</EM>, are inserted into
the structure only once, usually during program initialization, and are the structure only once, usually during program initialization, and are
not generally modified at run-time. not generally modified at run-time.
</P>
<P> <P>
Numerous static search structure implementations exist, e.g., Numerous static search structure implementations exist, e.g.,
arrays, linked lists, binary search trees, digital search tries, and arrays, linked lists, binary search trees, digital search tries, and
@@ -595,14 +596,14 @@ proportional to log <VAR>n</VAR>. Conversely, hash table implementations
often locate a table entry in constant time, but typically impose often locate a table entry in constant time, but typically impose
additional memory overhead and exhibit poor worst case performance. additional memory overhead and exhibit poor worst case performance.
</P>
<P> <P>
<A NAME="IDX3"></A> <A NAME="IDX3"></A>
<EM>Minimal perfect hash functions</EM> provide an optimal solution for a <EM>Minimal perfect hash functions</EM> provide an optimal solution for a
particular class of static search sets. A minimal perfect hash particular class of static search sets. A minimal perfect hash
function is defined by two properties: function is defined by two properties:
</P>
<UL> <UL>
<LI> <LI>
@@ -628,7 +629,7 @@ behavior generates <EM>near-minimal</EM> perfect hash functions for
keyword sets. However, <CODE>gperf</CODE> provides many options that permit keyword sets. However, <CODE>gperf</CODE> provides many options that permit
user control over the degree of minimality and perfection. user control over the degree of minimality and perfection.
</P>
<P> <P>
Static search sets often exhibit relative stability over time. For Static search sets often exhibit relative stability over time. For
example, Ada's 63 reserved words have remained constant for nearly a example, Ada's 63 reserved words have remained constant for nearly a
@@ -644,10 +645,10 @@ not yet part of the official GNU distribution. Each compiler utilizes
<CODE>gperf</CODE> to automatically generate static search structures that <CODE>gperf</CODE> to automatically generate static search structures that
efficiently identify their respective reserved keywords. efficiently identify their respective reserved keywords.
</P>
<H1><A NAME="SEC7" HREF="gperf.html#TOC7">3 High-Level Description of GNU <CODE>gperf</CODE></A></H1>
<H1><A NAME="SEC7" HREF="gperf.html#TOC7">3. High-Level Description of GNU <CODE>gperf</CODE></A></H1>
<P> <P>
The perfect hash function generator <CODE>gperf</CODE> reads a set of The perfect hash function generator <CODE>gperf</CODE> reads a set of
@@ -660,7 +661,7 @@ that perform hashing and table lookup recognition. All generated C code
is directed to the standard output. Command-line options described is directed to the standard output. Command-line options described
below allow you to modify the input and output format to <CODE>gperf</CODE>. below allow you to modify the input and output format to <CODE>gperf</CODE>.
</P>
<P> <P>
By default, <CODE>gperf</CODE> attempts to produce time-efficient code, with By default, <CODE>gperf</CODE> attempts to produce time-efficient code, with
less emphasis on efficient space utilization. However, several options less emphasis on efficient space utilization. However, several options
@@ -672,7 +673,7 @@ statement scheme that minimizes data space storage size. Furthermore,
using a C <CODE>switch</CODE> may actually speed up the keyword retrieval time using a C <CODE>switch</CODE> may actually speed up the keyword retrieval time
somewhat. Actual results depend on your C compiler, of course. somewhat. Actual results depend on your C compiler, of course.
</P>
<P> <P>
In general, <CODE>gperf</CODE> assigns values to the bytes it is using In general, <CODE>gperf</CODE> assigns values to the bytes it is using
for hashing until some set of values gives each keyword a unique value. for hashing until some set of values gives each keyword a unique value.
@@ -680,7 +681,7 @@ A helpful heuristic is that the larger the hash value range, the easier
it is for <CODE>gperf</CODE> to find and generate a perfect hash function. it is for <CODE>gperf</CODE> to find and generate a perfect hash function.
Experimentation is the key to getting the most from <CODE>gperf</CODE>. Experimentation is the key to getting the most from <CODE>gperf</CODE>.
</P>
<H2><A NAME="SEC8" HREF="gperf.html#TOC8">3.1 Input Format to <CODE>gperf</CODE></A></H2> <H2><A NAME="SEC8" HREF="gperf.html#TOC8">3.1 Input Format to <CODE>gperf</CODE></A></H2>
@@ -695,7 +696,7 @@ is similar to GNU utilities <CODE>flex</CODE> and <CODE>bison</CODE> (or UNIX
utilities <CODE>lex</CODE> and <CODE>yacc</CODE>). Here's an outline of the general utilities <CODE>lex</CODE> and <CODE>yacc</CODE>). Here's an outline of the general
format: format:
</P>
<PRE> <PRE>
declarations declarations
@@ -710,13 +711,14 @@ functions
the functions section are optional. The following sections describe the the functions section are optional. The following sections describe the
input format for each section. input format for each section.
</P>
<P> <P>
It is possible to omit the declaration section entirely, if the <SAMP>`-t'</SAMP> It is possible to omit the declaration section entirely, if the <SAMP>`-t'</SAMP>
option is not given. In this case the input file begins directly with the option is not given. In this case the input file begins directly with the
first keyword line, e.g.: first keyword line, e.g.:
</P>
<PRE> <PRE>
january january
@@ -736,6 +738,7 @@ arbitrary C declarations and definitions, <CODE>gperf</CODE> declarations that
act like command-line options, as well as for providing a user-supplied act like command-line options, as well as for providing a user-supplied
<CODE>struct</CODE>. <CODE>struct</CODE>.
</P>
@@ -752,12 +755,12 @@ This first field must be called <SAMP>`name'</SAMP>, although it is possible to
its name with the <SAMP>`-K'</SAMP> option (or, equivalently, the its name with the <SAMP>`-K'</SAMP> option (or, equivalently, the
<SAMP>`%define slot-name'</SAMP> declaration) described below. <SAMP>`%define slot-name'</SAMP> declaration) described below.
</P>
<P> <P>
Here is a simple example, using months of the year and their attributes as Here is a simple example, using months of the year and their attributes as
input: input:
</P>
<PRE> <PRE>
struct month { char *name; int number; int days; int leap_days; }; struct month { char *name; int number; int days; int leap_days; };
@@ -783,12 +786,12 @@ other fields are a pair of consecutive percent signs, <SAMP>`%%'</SAMP>,
appearing left justified in the first column, as in the UNIX utility appearing left justified in the first column, as in the UNIX utility
<CODE>lex</CODE>. <CODE>lex</CODE>.
</P>
<P> <P>
If the <CODE>struct</CODE> has already been declared in an include file, it can If the <CODE>struct</CODE> has already been declared in an include file, it can
be mentioned in an abbreviated form, like this: be mentioned in an abbreviated form, like this:
</P>
<PRE> <PRE>
struct month; struct month;
@@ -807,7 +810,7 @@ influence the way <CODE>gperf</CODE> works, like command line options do.
In fact, every such declaration is equivalent to a command line option. In fact, every such declaration is equivalent to a command line option.
There are three forms of declarations: There are three forms of declarations:
</P>
<OL> <OL>
<LI> <LI>
@@ -828,11 +831,11 @@ Declarations of names of entities in the output file, like
When a declaration is given both in the input file and as a command line When a declaration is given both in the input file and as a command line
option, the command-line option's value prevails. option, the command-line option's value prevails.
</P>
<P> <P>
The following <CODE>gperf</CODE> declarations are available. The following <CODE>gperf</CODE> declarations are available.
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`%delimiters=<VAR>delimiter-list</VAR>'</SAMP> <DT><SAMP>`%delimiters=<VAR>delimiter-list</VAR>'</SAMP>
@@ -1024,9 +1027,17 @@ hash table. Default name is <SAMP>`wordlist'</SAMP>. This option permits the
use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP> use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given. (or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`%switch=<VAR>count</VAR>'</SAMP> <DT><SAMP>`%define length-table-name <VAR>name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX29"></A> <A NAME="IDX29"></A>
Allows you to specify the name for the generated array containing the
length table. Default name is <SAMP>`lengthtable'</SAMP>. This option permits the
use of two length tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`%switch=<VAR>count</VAR>'</SAMP>
<DD>
<A NAME="IDX30"></A>
Causes the generated C code to use a <CODE>switch</CODE> statement scheme, Causes the generated C code to use a <CODE>switch</CODE> statement scheme,
rather than an array lookup table. This can lead to a reduction in both rather than an array lookup table. This can lead to a reduction in both
time and space requirements for some input files. The argument to this time and space requirements for some input files. The argument to this
@@ -1039,7 +1050,7 @@ was inspired in part by Keith Bostic's original C program.
<DT><SAMP>`%omit-struct-type'</SAMP> <DT><SAMP>`%omit-struct-type'</SAMP>
<DD> <DD>
<A NAME="IDX30"></A> <A NAME="IDX31"></A>
Prevents the transfer of the type declaration to the output file. Use Prevents the transfer of the type declaration to the output file. Use
this option if the type is already defined elsewhere. this option if the type is already defined elsewhere.
</DL> </DL>
@@ -1049,8 +1060,8 @@ this option if the type is already defined elsewhere.
<H4><A NAME="SEC12" HREF="gperf.html#TOC12">3.1.1.3 C Code Inclusion</A></H4> <H4><A NAME="SEC12" HREF="gperf.html#TOC12">3.1.1.3 C Code Inclusion</A></H4>
<P> <P>
<A NAME="IDX31"></A>
<A NAME="IDX32"></A> <A NAME="IDX32"></A>
<A NAME="IDX33"></A>
Using a syntax similar to GNU utilities <CODE>flex</CODE> and <CODE>bison</CODE>, it Using a syntax similar to GNU utilities <CODE>flex</CODE> and <CODE>bison</CODE>, it
is possible to directly include C source text and comments verbatim into is possible to directly include C source text and comments verbatim into
the generated output file. This is accomplished by enclosing the region the generated output file. This is accomplished by enclosing the region
@@ -1058,7 +1069,7 @@ inside left-justified surrounding <SAMP>`%{'</SAMP>, <SAMP>`%}'</SAMP> pairs. H
an input fragment based on the previous example that illustrates this an input fragment based on the previous example that illustrates this
feature: feature:
</P>
<PRE> <PRE>
%{ %{
@@ -1086,7 +1097,7 @@ in the first column is considered a comment. Everything following the
beginning with <SAMP>`%'</SAMP> in the first column is an option declaration and beginning with <SAMP>`%'</SAMP> in the first column is an option declaration and
must not occur within the keywords section. must not occur within the keywords section.
</P>
<P> <P>
The first field of each non-comment line is always the keyword itself. It The first field of each non-comment line is always the keyword itself. It
can be given in two ways: as a simple name, i.e., without surrounding can be given in two ways: as a simple name, i.e., without surrounding
@@ -1098,7 +1109,7 @@ In this context, a "field" is considered to extend up to, but
not include, the first blank, comma, or newline. Here is a simple not include, the first blank, comma, or newline. Here is a simple
example taken from a partial list of C reserved words: example taken from a partial list of C reserved words:
</P>
<PRE> <PRE>
# These are a few C reserved words, see the c.gperf file # These are a few C reserved words, see the c.gperf file
@@ -1118,7 +1129,7 @@ return
Note that unlike <CODE>flex</CODE> or <CODE>bison</CODE> the first <SAMP>`%%'</SAMP> marker Note that unlike <CODE>flex</CODE> or <CODE>bison</CODE> the first <SAMP>`%%'</SAMP> marker
may be elided if the declaration section is empty. may be elided if the declaration section is empty.
</P>
<P> <P>
Additional fields may optionally follow the leading keyword. Fields Additional fields may optionally follow the leading keyword. Fields
should be separated by commas, and terminate at the end of line. What should be separated by commas, and terminate at the end of line. What
@@ -1129,7 +1140,7 @@ declaration section. If the <SAMP>`-t'</SAMP> option (or, equivalently, the
these fields are simply ignored. All previous examples except the last these fields are simply ignored. All previous examples except the last
one contain keyword attributes. one contain keyword attributes.
</P>
<H3><A NAME="SEC14" HREF="gperf.html#TOC14">3.1.3 Including Additional C Functions</A></H3> <H3><A NAME="SEC14" HREF="gperf.html#TOC14">3.1.3 Including Additional C Functions</A></H3>
@@ -1142,7 +1153,7 @@ file, is included verbatim into the generated output file. Naturally,
it is your responsibility to ensure that the code contained in this it is your responsibility to ensure that the code contained in this
section is valid C. section is valid C.
</P>
<H3><A NAME="SEC15" HREF="gperf.html#TOC15">3.1.4 Where to place directives for GNU <CODE>indent</CODE>.</A></H3> <H3><A NAME="SEC15" HREF="gperf.html#TOC15">3.1.4 Where to place directives for GNU <CODE>indent</CODE>.</A></H3>
@@ -1155,7 +1166,7 @@ interpretation of the input file. Therefore you have to insert some
directives for GNU <CODE>indent</CODE>. More precisely, assuming the most directives for GNU <CODE>indent</CODE>. More precisely, assuming the most
general input file structure general input file structure
</P>
<PRE> <PRE>
declarations part 1 declarations part 1
@@ -1173,7 +1184,7 @@ functions
you would insert <SAMP>`*INDENT-OFF*'</SAMP> and <SAMP>`*INDENT-ON*'</SAMP> comments you would insert <SAMP>`*INDENT-OFF*'</SAMP> and <SAMP>`*INDENT-ON*'</SAMP> comments
as follows: as follows:
</P>
<PRE> <PRE>
/* *INDENT-OFF* */ /* *INDENT-OFF* */
@@ -1195,9 +1206,9 @@ functions
<H2><A NAME="SEC16" HREF="gperf.html#TOC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A></H2> <H2><A NAME="SEC16" HREF="gperf.html#TOC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A></H2>
<P> <P>
<A NAME="IDX33"></A> <A NAME="IDX34"></A>
</P>
<P> <P>
Several options control how the generated C code appears on the standard Several options control how the generated C code appears on the standard
output. Two C function are generated. They are called <CODE>hash</CODE> and output. Two C function are generated. They are called <CODE>hash</CODE> and
@@ -1206,11 +1217,11 @@ option. Both functions require two arguments, a string, <CODE>char *</CODE>
<VAR>str</VAR>, and a length parameter, <CODE>int</CODE> <VAR>len</VAR>. Their default <VAR>str</VAR>, and a length parameter, <CODE>int</CODE> <VAR>len</VAR>. Their default
function prototypes are as follows: function prototypes are as follows:
</P>
<P> <P>
<DL> <DL>
<DT><U>Function:</U> unsigned int <B>hash</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I> <DT><U>Function:</U> unsigned int <B>hash</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I>
<DD><A NAME="IDX34"></A> <DD><A NAME="IDX35"></A>
By default, the generated <CODE>hash</CODE> function returns an integer value By default, the generated <CODE>hash</CODE> function returns an integer value
created by adding <VAR>len</VAR> to several user-specified <VAR>str</VAR> byte created by adding <VAR>len</VAR> to several user-specified <VAR>str</VAR> byte
positions indexed into an <EM>associated values</EM> table stored in a positions indexed into an <EM>associated values</EM> table stored in a
@@ -1218,14 +1229,14 @@ local static array. The associated values table is constructed
internally by <CODE>gperf</CODE> and later output as a static local C array internally by <CODE>gperf</CODE> and later output as a static local C array
called <SAMP>`hash_table'</SAMP>. The relevant selected positions (i.e. indices called <SAMP>`hash_table'</SAMP>. The relevant selected positions (i.e. indices
into <VAR>str</VAR>) are specified via the <SAMP>`-k'</SAMP> option when running into <VAR>str</VAR>) are specified via the <SAMP>`-k'</SAMP> option when running
<CODE>gperf</CODE>, as detailed in the <EM>Options</EM> section below (see section <A HREF="gperf.html#SEC18">4. Invoking <CODE>gperf</CODE></A>). <CODE>gperf</CODE>, as detailed in the <EM>Options</EM> section below (see section <A HREF="gperf.html#SEC18">4 Invoking <CODE>gperf</CODE></A>).
</DL> </DL>
</P>
<P> <P>
<DL> <DL>
<DT><U>Function:</U> <B>in_word_set</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I> <DT><U>Function:</U> <B>in_word_set</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I>
<DD><A NAME="IDX35"></A> <DD><A NAME="IDX36"></A>
If <VAR>str</VAR> is in the keyword set, returns a pointer to that If <VAR>str</VAR> is in the keyword set, returns a pointer to that
keyword. More exactly, if the option <SAMP>`-t'</SAMP> (or, equivalently, the keyword. More exactly, if the option <SAMP>`-t'</SAMP> (or, equivalently, the
<SAMP>`%struct-type'</SAMP> declaration) was given, it returns <SAMP>`%struct-type'</SAMP> declaration) was given, it returns
@@ -1233,7 +1244,7 @@ a pointer to the matching keyword's structure. Otherwise it returns
<CODE>NULL</CODE>. <CODE>NULL</CODE>.
</DL> </DL>
</P>
<P> <P>
If the option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP> If the option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP>
declaration) is not used, <VAR>str</VAR> must be a NUL terminated declaration) is not used, <VAR>str</VAR> must be a NUL terminated
@@ -1242,12 +1253,12 @@ string of exactly length <VAR>len</VAR>. If <SAMP>`-c'</SAMP> (or, equivalently
simply be an array of <VAR>len</VAR> bytes and does not need to be NUL simply be an array of <VAR>len</VAR> bytes and does not need to be NUL
terminated. terminated.
</P>
<P> <P>
The code generated for these two functions is affected by the following The code generated for these two functions is affected by the following
options: options:
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-t'</SAMP> <DT><SAMP>`-t'</SAMP>
@@ -1260,7 +1271,7 @@ Make use of the user-defined <CODE>struct</CODE>.
<DD> <DD>
<DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP> <DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX36"></A> <A NAME="IDX37"></A>
Generate 1 or more C <CODE>switch</CODE> statement rather than use a large, Generate 1 or more C <CODE>switch</CODE> statement rather than use a large,
(and potentially sparse) static array. Although the exact time and (and potentially sparse) static array. Although the exact time and
space savings of this approach vary according to your C compiler's space savings of this approach vary according to your C compiler's
@@ -1278,14 +1289,14 @@ with the various input and output options, and timing the resulting C
code, you can determine the best option choices for different keyword code, you can determine the best option choices for different keyword
set characteristics. set characteristics.
</P>
<H2><A NAME="SEC17" HREF="gperf.html#TOC17">3.3 Use of NUL bytes</A></H2> <H2><A NAME="SEC17" HREF="gperf.html#TOC17">3.3 Use of NUL bytes</A></H2>
<P> <P>
<A NAME="IDX37"></A> <A NAME="IDX38"></A>
</P>
<P> <P>
By default, the code generated by <CODE>gperf</CODE> operates on zero By default, the code generated by <CODE>gperf</CODE> operates on zero
terminated strings, the usual representation of strings in C. This means terminated strings, the usual representation of strings in C. This means
@@ -1293,7 +1304,7 @@ that the keywords in the input file must not contain NUL bytes,
and the <VAR>str</VAR> argument passed to <CODE>hash</CODE> or <CODE>in_word_set</CODE> and the <VAR>str</VAR> argument passed to <CODE>hash</CODE> or <CODE>in_word_set</CODE>
must be NUL terminated and have exactly length <VAR>len</VAR>. must be NUL terminated and have exactly length <VAR>len</VAR>.
</P>
<P> <P>
If option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP> If option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP>
declaration) is used, then the <VAR>str</VAR> argument does not need declaration) is used, then the <VAR>str</VAR> argument does not need
@@ -1302,7 +1313,7 @@ access the first <VAR>len</VAR>, not <VAR>len+1</VAR>, bytes starting at <VAR>st
However, the keywords in the input file still must not contain NUL However, the keywords in the input file still must not contain NUL
bytes. bytes.
</P>
<P> <P>
If option <SAMP>`-l'</SAMP> (or, equivalently, the <SAMP>`%compare-lengths'</SAMP> If option <SAMP>`-l'</SAMP> (or, equivalently, the <SAMP>`%compare-lengths'</SAMP>
declaration) is used, then the hash table performs binary declaration) is used, then the hash table performs binary
@@ -1312,10 +1323,10 @@ generated by <CODE>gperf</CODE> will treat NUL like any other byte.
Also, in this case the <SAMP>`-c'</SAMP> option (or, equivalently, the Also, in this case the <SAMP>`-c'</SAMP> option (or, equivalently, the
<SAMP>`%compare-strncmp'</SAMP> declaration) is ignored. <SAMP>`%compare-strncmp'</SAMP> declaration) is ignored.
</P>
<H1><A NAME="SEC18" HREF="gperf.html#TOC18">4 Invoking <CODE>gperf</CODE></A></H1>
<H1><A NAME="SEC18" HREF="gperf.html#TOC18">4. Invoking <CODE>gperf</CODE></A></H1>
<P> <P>
There are <EM>many</EM> options to <CODE>gperf</CODE>. They were added to make There are <EM>many</EM> options to <CODE>gperf</CODE>. They were added to make
@@ -1323,6 +1334,7 @@ the program more convenient for use with real applications. "On-line"
help is readily available via the <SAMP>`--help'</SAMP> option. Here is the help is readily available via the <SAMP>`--help'</SAMP> option. Here is the
complete list of options. complete list of options.
</P>
@@ -1339,7 +1351,7 @@ Allows you to specify the name of the file to which the output is written to.
The results are written to standard output if no output file is specified The results are written to standard output if no output file is specified
or if it is <SAMP>`-'</SAMP>. or if it is <SAMP>`-'</SAMP>.
</P>
<H2><A NAME="SEC20" HREF="gperf.html#TOC20">4.2 Options that affect Interpretation of the Input File</A></H2> <H2><A NAME="SEC20" HREF="gperf.html#TOC20">4.2 Options that affect Interpretation of the Input File</A></H2>
@@ -1348,14 +1360,14 @@ or if it is <SAMP>`-'</SAMP>.
These options are also available as declarations in the input file These options are also available as declarations in the input file
(see section <A HREF="gperf.html#SEC11">3.1.1.2 Gperf Declarations</A>). (see section <A HREF="gperf.html#SEC11">3.1.1.2 Gperf Declarations</A>).
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-e <VAR>keyword-delimiter-list</VAR>'</SAMP> <DT><SAMP>`-e <VAR>keyword-delimiter-list</VAR>'</SAMP>
<DD> <DD>
<DT><SAMP>`--delimiters=<VAR>keyword-delimiter-list</VAR>'</SAMP> <DT><SAMP>`--delimiters=<VAR>keyword-delimiter-list</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX38"></A> <A NAME="IDX39"></A>
Allows you to provide a string containing delimiters used to Allows you to provide a string containing delimiters used to
separate keywords from their attributes. The default is ",". This separate keywords from their attributes. The default is ",". This
option is essential if you want to use keywords that have embedded option is essential if you want to use keywords that have embedded
@@ -1394,7 +1406,7 @@ the <CODE>gperf</CODE> generated function.
These options are also available as declarations in the input file These options are also available as declarations in the input file
(see section <A HREF="gperf.html#SEC11">3.1.1.2 Gperf Declarations</A>). (see section <A HREF="gperf.html#SEC11">3.1.1.2 Gperf Declarations</A>).
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-L <VAR>generated-language-name</VAR>'</SAMP> <DT><SAMP>`-L <VAR>generated-language-name</VAR>'</SAMP>
@@ -1448,14 +1460,14 @@ This option is supported for compatibility with previous releases of
Most of these options are also available as declarations in the input file Most of these options are also available as declarations in the input file
(see section <A HREF="gperf.html#SEC11">3.1.1.2 Gperf Declarations</A>). (see section <A HREF="gperf.html#SEC11">3.1.1.2 Gperf Declarations</A>).
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-K <VAR>slot-name</VAR>'</SAMP> <DT><SAMP>`-K <VAR>slot-name</VAR>'</SAMP>
<DD> <DD>
<DT><SAMP>`--slot-name=<VAR>slot-name</VAR>'</SAMP> <DT><SAMP>`--slot-name=<VAR>slot-name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX39"></A> <A NAME="IDX40"></A>
This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the
<SAMP>`%struct-type'</SAMP> declaration) has been given. <SAMP>`%struct-type'</SAMP> declaration) has been given.
By default, the program assumes the structure component identifier for By default, the program assumes the structure component identifier for
@@ -1467,7 +1479,7 @@ field in your supplied <CODE>struct</CODE>.
<DD> <DD>
<DT><SAMP>`--initializer-suffix=<VAR>initializers</VAR>'</SAMP> <DT><SAMP>`--initializer-suffix=<VAR>initializers</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX40"></A> <A NAME="IDX41"></A>
This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the
<SAMP>`%struct-type'</SAMP> declaration) has been given. <SAMP>`%struct-type'</SAMP> declaration) has been given.
It permits to specify initializers for the structure members following It permits to specify initializers for the structure members following
@@ -1495,7 +1507,7 @@ generated hash functions to be used in the same application.
<DD> <DD>
<DT><SAMP>`--class-name=<VAR>class-name</VAR>'</SAMP> <DT><SAMP>`--class-name=<VAR>class-name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX41"></A> <A NAME="IDX42"></A>
This option is only useful when option <SAMP>`-L C++'</SAMP> (or, equivalently, This option is only useful when option <SAMP>`-L C++'</SAMP> (or, equivalently,
the <SAMP>`%language=C++'</SAMP> declaration) has been given. It the <SAMP>`%language=C++'</SAMP> declaration) has been given. It
allows you to specify the name of generated C++ class. Default name is allows you to specify the name of generated C++ class. Default name is
@@ -1601,17 +1613,25 @@ of one more test-and-branch instruction at run time.
<DD> <DD>
<DT><SAMP>`--word-array-name=<VAR>hash-table-array-name</VAR>'</SAMP> <DT><SAMP>`--word-array-name=<VAR>hash-table-array-name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX42"></A> <A NAME="IDX43"></A>
Allows you to specify the name for the generated array containing the Allows you to specify the name for the generated array containing the
hash table. Default name is <SAMP>`wordlist'</SAMP>. This option permits the hash table. Default name is <SAMP>`wordlist'</SAMP>. This option permits the
use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP> use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given. (or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`--length-table-name=<VAR>length-table-array-name</VAR>'</SAMP>
<DD>
<A NAME="IDX44"></A>
Allows you to specify the name for the generated array containing the
length table. Default name is <SAMP>`lengthtable'</SAMP>. This option permits the
use of two length tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`-S <VAR>total-switch-statements</VAR>'</SAMP> <DT><SAMP>`-S <VAR>total-switch-statements</VAR>'</SAMP>
<DD> <DD>
<DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP> <DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX43"></A> <A NAME="IDX45"></A>
Causes the generated C code to use a <CODE>switch</CODE> statement scheme, Causes the generated C code to use a <CODE>switch</CODE> statement scheme,
rather than an array lookup table. This can lead to a reduction in both rather than an array lookup table. This can lead to a reduction in both
time and space requirements for some input files. The argument to this time and space requirements for some input files. The argument to this
@@ -1671,7 +1691,7 @@ through a search that minimizes the number of byte positions.
<DD> <DD>
<DT><SAMP>`--duplicates'</SAMP> <DT><SAMP>`--duplicates'</SAMP>
<DD> <DD>
<A NAME="IDX44"></A> <A NAME="IDX46"></A>
Handle keywords whose selected byte sets hash to duplicate values. Handle keywords whose selected byte sets hash to duplicate values.
Duplicate hash values can occur if a set of keywords has the same names, but Duplicate hash values can occur if a set of keywords has the same names, but
possesses different attributes, or if the selected byte positions are not well possesses different attributes, or if the selected byte positions are not well
@@ -1708,7 +1728,7 @@ option is not particularly useful when <SAMP>`-S'</SAMP> (or, equivalently,
<DD> <DD>
<DT><SAMP>`--jump=<VAR>jump-value</VAR>'</SAMP> <DT><SAMP>`--jump=<VAR>jump-value</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX45"></A> <A NAME="IDX47"></A>
Affects the "jump value", i.e., how far to advance the associated Affects the "jump value", i.e., how far to advance the associated
byte value upon collisions. <VAR>Jump-value</VAR> is rounded up to an byte value upon collisions. <VAR>Jump-value</VAR> is rounded up to an
odd number, the default is 5. If the <VAR>jump-value</VAR> is 0 <CODE>gperf</CODE> odd number, the default is 5. If the <VAR>jump-value</VAR> is 0 <CODE>gperf</CODE>
@@ -1793,13 +1813,13 @@ option is enabled.
<H1><A NAME="SEC25" HREF="gperf.html#TOC25">5. Known Bugs and Limitations with <CODE>gperf</CODE></A></H1> <H1><A NAME="SEC25" HREF="gperf.html#TOC25">5 Known Bugs and Limitations with <CODE>gperf</CODE></A></H1>
<P> <P>
The following are some limitations with the current release of The following are some limitations with the current release of
<CODE>gperf</CODE>: <CODE>gperf</CODE>:
</P>
<UL> <UL>
<LI> <LI>
@@ -1835,7 +1855,7 @@ the constraint.
<H1><A NAME="SEC26" HREF="gperf.html#TOC26">6. Things Still Left to Do</A></H1> <H1><A NAME="SEC26" HREF="gperf.html#TOC26">6 Things Still Left to Do</A></H1>
<P> <P>
It should be "relatively" easy to replace the current perfect hash It should be "relatively" easy to replace the current perfect hash
@@ -1843,7 +1863,7 @@ function algorithm with a more exhaustive approach; the perfect hash
module is essential independent from other program modules. Additional module is essential independent from other program modules. Additional
worthwhile improvements include: worthwhile improvements include:
</P>
<UL> <UL>
<LI> <LI>
@@ -1866,85 +1886,85 @@ C and C++ routines.
<H1><A NAME="SEC27" HREF="gperf.html#TOC27">7. Bibliography</A></H1> <H1><A NAME="SEC27" HREF="gperf.html#TOC27">7 Bibliography</A></H1>
<P> <P>
[1] Chang, C.C.: <I>A Scheme for Constructing Ordered Minimal Perfect [1] Chang, C.C.: <I>A Scheme for Constructing Ordered Minimal Perfect
Hashing Functions</I> Information Sciences 39(1986), 187-195. Hashing Functions</I> Information Sciences 39(1986), 187-195.
</P>
<P> <P>
[2] Cichelli, Richard J. <I>Author's Response to "On Cichelli's Minimal Perfect Hash [2] Cichelli, Richard J. <I>Author's Response to "On Cichelli's Minimal Perfect Hash
Functions Method"</I> Communications of the ACM, 23, 12(December 1980), 729. Functions Method"</I> Communications of the ACM, 23, 12(December 1980), 729.
</P>
<P> <P>
[3] Cichelli, Richard J. <I>Minimal Perfect Hash Functions Made Simple</I> [3] Cichelli, Richard J. <I>Minimal Perfect Hash Functions Made Simple</I>
Communications of the ACM, 23, 1(January 1980), 17-19. Communications of the ACM, 23, 1(January 1980), 17-19.
</P>
<P> <P>
[4] Cook, C. R. and Oldehoeft, R.R. <I>A Letter Oriented Minimal [4] Cook, C. R. and Oldehoeft, R.R. <I>A Letter Oriented Minimal
Perfect Hashing Function</I> SIGPLAN Notices, 17, 9(September 1982), 18-27. Perfect Hashing Function</I> SIGPLAN Notices, 17, 9(September 1982), 18-27.
</P>
<P> <P>
[5] Cormack, G. V. and Horspool, R. N. S. and Kaiserwerth, M. [5] Cormack, G. V. and Horspool, R. N. S. and Kaiserwerth, M.
<I>Practical Perfect Hashing</I> Computer Journal, 28, 1(January 1985), 54-58. <I>Practical Perfect Hashing</I> Computer Journal, 28, 1(January 1985), 54-58.
</P>
<P> <P>
[6] Jaeschke, G. <I>Reciprocal Hashing: A Method for Generating Minimal [6] Jaeschke, G. <I>Reciprocal Hashing: A Method for Generating Minimal
Perfect Hashing Functions</I> Communications of the ACM, 24, 12(December Perfect Hashing Functions</I> Communications of the ACM, 24, 12(December
1981), 829-833. 1981), 829-833.
</P>
<P> <P>
[7] Jaeschke, G. and Osterburg, G. <I>On Cichelli's Minimal Perfect [7] Jaeschke, G. and Osterburg, G. <I>On Cichelli's Minimal Perfect
Hash Functions Method</I> Communications of the ACM, 23, 12(December 1980), Hash Functions Method</I> Communications of the ACM, 23, 12(December 1980),
728-729. 728-729.
</P>
<P> <P>
[8] Sager, Thomas J. <I>A Polynomial Time Generator for Minimal Perfect [8] Sager, Thomas J. <I>A Polynomial Time Generator for Minimal Perfect
Hash Functions</I> Communications of the ACM, 28, 5(December 1985), 523-532 Hash Functions</I> Communications of the ACM, 28, 5(December 1985), 523-532
</P>
<P> <P>
[9] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I> [9] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I>
Second USENIX C++ Conference Proceedings, April 1990. Second USENIX C++ Conference Proceedings, April 1990.
</P>
<P> <P>
[10] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I> [10] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I>
C++ Report, SIGS 10 10 (November/December 1998). C++ Report, SIGS 10 10 (November/December 1998).
</P>
<P> <P>
[11] Sebesta, R.W. and Taylor, M.A. <I>Minimal Perfect Hash Functions [11] Sebesta, R.W. and Taylor, M.A. <I>Minimal Perfect Hash Functions
for Reserved Word Lists</I> SIGPLAN Notices, 20, 12(September 1985), 47-53. for Reserved Word Lists</I> SIGPLAN Notices, 20, 12(September 1985), 47-53.
</P>
<P> <P>
[12] Sprugnoli, R. <I>Perfect Hashing Functions: A Single Probe [12] Sprugnoli, R. <I>Perfect Hashing Functions: A Single Probe
Retrieving Method for Static Sets</I> Communications of the ACM, 20 Retrieving Method for Static Sets</I> Communications of the ACM, 20
11(November 1977), 841-850. 11(November 1977), 841-850.
</P>
<P> <P>
[13] Stallman, Richard M. <I>Using and Porting GNU CC</I> Free Software Foundation, [13] Stallman, Richard M. <I>Using and Porting GNU CC</I> Free Software Foundation,
1988. 1988.
</P>
<P> <P>
[14] Stroustrup, Bjarne <I>The C++ Programming Language.</I> Addison-Wesley, 1986. [14] Stroustrup, Bjarne <I>The C++ Programming Language.</I> Addison-Wesley, 1986.
</P>
<P> <P>
[15] Tiemann, Michael D. <I>User's Guide to GNU C++</I> Free Software [15] Tiemann, Michael D. <I>User's Guide to GNU C++</I> Free Software
Foundation, 1989. Foundation, 1989.
</P>
<H1><A NAME="SEC28" HREF="gperf.html#TOC28">Concept Index</A></H1> <H1><A NAME="SEC28" HREF="gperf.html#TOC28">Concept Index</A></H1>
@@ -1986,6 +2006,7 @@ Jump to:
<LI><A HREF="gperf.html#IDX17"><SAMP>`%define class-name'</SAMP></A> <LI><A HREF="gperf.html#IDX17"><SAMP>`%define class-name'</SAMP></A>
<LI><A HREF="gperf.html#IDX15"><SAMP>`%define hash-function-name'</SAMP></A> <LI><A HREF="gperf.html#IDX15"><SAMP>`%define hash-function-name'</SAMP></A>
<LI><A HREF="gperf.html#IDX14"><SAMP>`%define initializer-suffix'</SAMP></A> <LI><A HREF="gperf.html#IDX14"><SAMP>`%define initializer-suffix'</SAMP></A>
<LI><A HREF="gperf.html#IDX29"><SAMP>`%define length-table-name'</SAMP></A>
<LI><A HREF="gperf.html#IDX16"><SAMP>`%define lookup-function-name'</SAMP></A> <LI><A HREF="gperf.html#IDX16"><SAMP>`%define lookup-function-name'</SAMP></A>
<LI><A HREF="gperf.html#IDX13"><SAMP>`%define slot-name'</SAMP></A> <LI><A HREF="gperf.html#IDX13"><SAMP>`%define slot-name'</SAMP></A>
<LI><A HREF="gperf.html#IDX26"><SAMP>`%define string-pool-name'</SAMP></A> <LI><A HREF="gperf.html#IDX26"><SAMP>`%define string-pool-name'</SAMP></A>
@@ -1997,17 +2018,17 @@ Jump to:
<LI><A HREF="gperf.html#IDX23"><SAMP>`%includes'</SAMP></A> <LI><A HREF="gperf.html#IDX23"><SAMP>`%includes'</SAMP></A>
<LI><A HREF="gperf.html#IDX12"><SAMP>`%language'</SAMP></A> <LI><A HREF="gperf.html#IDX12"><SAMP>`%language'</SAMP></A>
<LI><A HREF="gperf.html#IDX27"><SAMP>`%null-strings'</SAMP></A> <LI><A HREF="gperf.html#IDX27"><SAMP>`%null-strings'</SAMP></A>
<LI><A HREF="gperf.html#IDX30"><SAMP>`%omit-struct-type'</SAMP></A> <LI><A HREF="gperf.html#IDX31"><SAMP>`%omit-struct-type'</SAMP></A>
<LI><A HREF="gperf.html#IDX25"><SAMP>`%pic'</SAMP></A> <LI><A HREF="gperf.html#IDX25"><SAMP>`%pic'</SAMP></A>
<LI><A HREF="gperf.html#IDX21"><SAMP>`%readonly-tables'</SAMP></A> <LI><A HREF="gperf.html#IDX21"><SAMP>`%readonly-tables'</SAMP></A>
<LI><A HREF="gperf.html#IDX10"><SAMP>`%struct-type'</SAMP></A> <LI><A HREF="gperf.html#IDX10"><SAMP>`%struct-type'</SAMP></A>
<LI><A HREF="gperf.html#IDX29"><SAMP>`%switch'</SAMP></A> <LI><A HREF="gperf.html#IDX30"><SAMP>`%switch'</SAMP></A>
<LI><A HREF="gperf.html#IDX31"><SAMP>`%{'</SAMP></A> <LI><A HREF="gperf.html#IDX32"><SAMP>`%{'</SAMP></A>
<LI><A HREF="gperf.html#IDX32"><SAMP>`%}'</SAMP></A> <LI><A HREF="gperf.html#IDX33"><SAMP>`%}'</SAMP></A>
</DIR> </DIR>
<H2><A NAME="cindex_a">a</A></H2> <H2><A NAME="cindex_a">a</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX42">Array name</A> <LI><A HREF="gperf.html#IDX43">Array name</A>, <A HREF="gperf.html#IDX44">Array name</A>
</DIR> </DIR>
<H2><A NAME="cindex_b">b</A></H2> <H2><A NAME="cindex_b">b</A></H2>
<DIR> <DIR>
@@ -2015,13 +2036,13 @@ Jump to:
</DIR> </DIR>
<H2><A NAME="cindex_c">c</A></H2> <H2><A NAME="cindex_c">c</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX41">Class name</A> <LI><A HREF="gperf.html#IDX42">Class name</A>
</DIR> </DIR>
<H2><A NAME="cindex_d">d</A></H2> <H2><A NAME="cindex_d">d</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX5">Declaration section</A> <LI><A HREF="gperf.html#IDX5">Declaration section</A>
<LI><A HREF="gperf.html#IDX38">Delimiters</A> <LI><A HREF="gperf.html#IDX39">Delimiters</A>
<LI><A HREF="gperf.html#IDX44">Duplicates</A> <LI><A HREF="gperf.html#IDX46">Duplicates</A>
</DIR> </DIR>
<H2><A NAME="cindex_f">f</A></H2> <H2><A NAME="cindex_f">f</A></H2>
<DIR> <DIR>
@@ -2030,17 +2051,17 @@ Jump to:
</DIR> </DIR>
<H2><A NAME="cindex_h">h</A></H2> <H2><A NAME="cindex_h">h</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX34">hash</A> <LI><A HREF="gperf.html#IDX35">hash</A>
<LI><A HREF="gperf.html#IDX33">hash table</A> <LI><A HREF="gperf.html#IDX34">hash table</A>
</DIR> </DIR>
<H2><A NAME="cindex_i">i</A></H2> <H2><A NAME="cindex_i">i</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX35">in_word_set</A> <LI><A HREF="gperf.html#IDX36">in_word_set</A>
<LI><A HREF="gperf.html#IDX40">Initializers</A> <LI><A HREF="gperf.html#IDX41">Initializers</A>
</DIR> </DIR>
<H2><A NAME="cindex_j">j</A></H2> <H2><A NAME="cindex_j">j</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX45">Jump value</A> <LI><A HREF="gperf.html#IDX47">Jump value</A>
</DIR> </DIR>
<H2><A NAME="cindex_k">k</A></H2> <H2><A NAME="cindex_k">k</A></H2>
<DIR> <DIR>
@@ -2052,18 +2073,19 @@ Jump to:
</DIR> </DIR>
<H2><A NAME="cindex_n">n</A></H2> <H2><A NAME="cindex_n">n</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX37">NUL</A> <LI><A HREF="gperf.html#IDX38">NUL</A>
</DIR> </DIR>
<H2><A NAME="cindex_s">s</A></H2> <H2><A NAME="cindex_s">s</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf.html#IDX39">Slot name</A> <LI><A HREF="gperf.html#IDX40">Slot name</A>
<LI><A HREF="gperf.html#IDX2">Static search structure</A> <LI><A HREF="gperf.html#IDX2">Static search structure</A>
<LI><A HREF="gperf.html#IDX36"><CODE>switch</CODE></A>, <A HREF="gperf.html#IDX43"><CODE>switch</CODE></A> <LI><A HREF="gperf.html#IDX37"><CODE>switch</CODE></A>, <A HREF="gperf.html#IDX45"><CODE>switch</CODE></A>
</DIR> </DIR>
</P>
<P><HR><P> <P><HR><P>
This document was generated on 12 June 2003 using This document was generated on 13 January 2006 using the
<A HREF="http://wwwinfo.cern.ch/dis/texi2html/">texi2html</A>&nbsp;1.56k. <A HREF="http://wwwinfo.cern.ch/dis/texi2html/">texi2html</A>
translator version 1.52.</P>
</BODY> </BODY>
</HTML> </HTML>

340
doc/gperf.info
View File

@@ -1,5 +1,4 @@
Dies ist gperf.info, hergestellt von Makeinfo Version 4.3 aus This is gperf.info, produced by makeinfo version 4.8 from gperf.texi.
gperf.texi.
INFO-DIR-SECTION Programming Tools INFO-DIR-SECTION Programming Tools
START-INFO-DIR-ENTRY START-INFO-DIR-ENTRY
@@ -7,9 +6,9 @@ START-INFO-DIR-ENTRY
END-INFO-DIR-ENTRY END-INFO-DIR-ENTRY
This file documents the features of the GNU Perfect Hash Function This file documents the features of the GNU Perfect Hash Function
Generator 3.0.1. Generator 3.0.2.
Copyright (C) 1989-2003 Free Software Foundation, Inc. Copyright (C) 1989-2004 Free Software Foundation, Inc.
Permission is granted to make and distribute verbatim copies of this Permission is granted to make and distribute verbatim copies of this
manual provided the copyright notice and this permission notice are manual provided the copyright notice and this permission notice are
@@ -34,7 +33,7 @@ File: gperf.info, Node: Top, Next: Copying, Prev: (dir), Up: (dir)
Introduction Introduction
************ ************
This manual documents the GNU `gperf' perfect hash function generator This manual documents the GNU `gperf' perfect hash function generator
utility, focusing on its features and how to use them, and how to report utility, focusing on its features and how to use them, and how to report
bugs. bugs.
@@ -88,6 +87,7 @@ GNU GENERAL PUBLIC LICENSE
************************** **************************
Version 2, June 1991 Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc., Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
@@ -97,9 +97,9 @@ GNU GENERAL PUBLIC LICENSE
Preamble Preamble
======== ========
The licenses for most software are designed to take away your The licenses for most software are designed to take away your freedom
freedom to share and change it. By contrast, the GNU General Public to share and change it. By contrast, the GNU General Public License is
License is intended to guarantee your freedom to share and change free intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to Foundation's software and to any other program whose authors commit to
@@ -352,7 +352,6 @@ modification follow.
and reuse of software generally. and reuse of software generally.
NO WARRANTY NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO
WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE
LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
@@ -376,11 +375,10 @@ modification follow.
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs How to Apply These Terms to Your New Programs
============================================= =============================================
If you develop a new program, and you want it to be of the greatest If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these free software which everyone can redistribute and change under these
terms. terms.
@@ -473,10 +471,10 @@ Contributors to GNU `gperf' Utility
 
File: gperf.info, Node: Motivation, Next: Search Structures, Prev: Contributors, Up: Top File: gperf.info, Node: Motivation, Next: Search Structures, Prev: Contributors, Up: Top
Introduction 1 Introduction
************ **************
`gperf' is a perfect hash function generator written in C++. It `gperf' is a perfect hash function generator written in C++. It
transforms an N element user-specified keyword set W into a perfect transforms an N element user-specified keyword set W into a perfect
hash function F. F uniquely maps keywords in W onto the range 0..K, hash function F. F uniquely maps keywords in W onto the range 0..K,
where K >= N-1. If K = N-1 then F is a _minimal_ perfect hash function. where K >= N-1. If K = N-1 then F is a _minimal_ perfect hash function.
@@ -496,10 +494,10 @@ available in the Second USENIX C++ Conference proceedings or from
 
File: gperf.info, Node: Search Structures, Next: Description, Prev: Motivation, Up: Top File: gperf.info, Node: Search Structures, Next: Description, Prev: Motivation, Up: Top
Static search structures and GNU `gperf' 2 Static search structures and GNU `gperf'
**************************************** ******************************************
A "static search structure" is an Abstract Data Type with certain A "static search structure" is an Abstract Data Type with certain
fundamental operations, e.g., _initialize_, _insert_, and _retrieve_. fundamental operations, e.g., _initialize_, _insert_, and _retrieve_.
Conceptually, all insertions occur before any retrievals. In practice, Conceptually, all insertions occur before any retrievals. In practice,
`gperf' generates a _static_ array containing search set keywords and `gperf' generates a _static_ array containing search set keywords and
@@ -562,8 +560,8 @@ efficiently identify their respective reserved keywords.
 
File: gperf.info, Node: Description, Next: Options, Prev: Search Structures, Up: Top File: gperf.info, Node: Description, Next: Options, Prev: Search Structures, Up: Top
High-Level Description of GNU `gperf' 3 High-Level Description of GNU `gperf'
************************************* ***************************************
* Menu: * Menu:
@@ -600,10 +598,10 @@ Experimentation is the key to getting the most from `gperf'.
 
File: gperf.info, Node: Input Format, Next: Output Format, Prev: Description, Up: Description File: gperf.info, Node: Input Format, Next: Output Format, Prev: Description, Up: Description
Input Format to `gperf' 3.1 Input Format to `gperf'
======================= ===========================
You can control the input file format by varying certain command-line You can control the input file format by varying certain command-line
arguments, in particular the `-t' option. The input's appearance is arguments, in particular the `-t' option. The input's appearance is
similar to GNU utilities `flex' and `bison' (or UNIX utilities `lex' similar to GNU utilities `flex' and `bison' (or UNIX utilities `lex'
and `yacc'). Here's an outline of the general format: and `yacc'). Here's an outline of the general format:
@@ -638,10 +636,10 @@ the first keyword line, e.g.:
 
File: gperf.info, Node: Declarations, Next: Keywords, Prev: Input Format, Up: Input Format File: gperf.info, Node: Declarations, Next: Keywords, Prev: Input Format, Up: Input Format
Declarations 3.1.1 Declarations
------------ ------------------
The keyword input file optionally contains a section for including The keyword input file optionally contains a section for including
arbitrary C declarations and definitions, `gperf' declarations that act arbitrary C declarations and definitions, `gperf' declarations that act
like command-line options, as well as for providing a user-supplied like command-line options, as well as for providing a user-supplied
`struct'. `struct'.
@@ -655,10 +653,10 @@ like command-line options, as well as for providing a user-supplied
 
File: gperf.info, Node: User-supplied Struct, Next: Gperf Declarations, Prev: Declarations, Up: Declarations File: gperf.info, Node: User-supplied Struct, Next: Gperf Declarations, Prev: Declarations, Up: Declarations
User-supplied `struct' 3.1.1.1 User-supplied `struct'
...................... ..............................
If the `-t' option (or, equivalently, the `%struct-type' declaration) If the `-t' option (or, equivalently, the `%struct-type' declaration)
_is_ enabled, you _must_ provide a C `struct' as the last component in _is_ enabled, you _must_ provide a C `struct' as the last component in
the declaration section from the input file. The first field in this the declaration section from the input file. The first field in this
struct must be of type `char *' or `const char *' if the `-P' option is struct must be of type `char *' or `const char *' if the `-P' option is
@@ -700,10 +698,10 @@ be mentioned in an abbreviated form, like this:
 
File: gperf.info, Node: Gperf Declarations, Next: C Code Inclusion, Prev: User-supplied Struct, Up: Declarations File: gperf.info, Node: Gperf Declarations, Next: C Code Inclusion, Prev: User-supplied Struct, Up: Declarations
Gperf Declarations 3.1.1.2 Gperf Declarations
.................. ..........................
The declaration section can contain `gperf' declarations. They The declaration section can contain `gperf' declarations. They
influence the way `gperf' works, like command line options do. In influence the way `gperf' works, like command line options do. In
fact, every such declaration is equivalent to a command line option. fact, every such declaration is equivalent to a command line option.
There are three forms of declarations: There are three forms of declarations:
@@ -869,6 +867,13 @@ line option, the command-line option's value prevails.
the use of two hash tables in the same file, even when the option the use of two hash tables in the same file, even when the option
`-G' (or, equivalently, the `%global-table' declaration) is given. `-G' (or, equivalently, the `%global-table' declaration) is given.
`%define length-table-name NAME'
Allows you to specify the name for the generated array containing
the length table. Default name is `lengthtable'. This option
permits the use of two length tables in the same file, even when
the option `-G' (or, equivalently, the `%global-table'
declaration) is given.
`%switch=COUNT' `%switch=COUNT'
Causes the generated C code to use a `switch' statement scheme, Causes the generated C code to use a `switch' statement scheme,
rather than an array lookup table. This can lead to a reduction rather than an array lookup table. This can lead to a reduction
@@ -888,10 +893,10 @@ line option, the command-line option's value prevails.
 
File: gperf.info, Node: C Code Inclusion, Prev: Gperf Declarations, Up: Declarations File: gperf.info, Node: C Code Inclusion, Prev: Gperf Declarations, Up: Declarations
C Code Inclusion 3.1.1.3 C Code Inclusion
................ ........................
Using a syntax similar to GNU utilities `flex' and `bison', it is Using a syntax similar to GNU utilities `flex' and `bison', it is
possible to directly include C source text and comments verbatim into possible to directly include C source text and comments verbatim into
the generated output file. This is accomplished by enclosing the region the generated output file. This is accomplished by enclosing the region
inside left-justified surrounding `%{', `%}' pairs. Here is an input inside left-justified surrounding `%{', `%}' pairs. Here is an input
@@ -912,13 +917,13 @@ fragment based on the previous example that illustrates this feature:
 
File: gperf.info, Node: Keywords, Next: Functions, Prev: Declarations, Up: Input Format File: gperf.info, Node: Keywords, Next: Functions, Prev: Declarations, Up: Input Format
Format for Keyword Entries 3.1.2 Format for Keyword Entries
-------------------------- --------------------------------
The second input file format section contains lines of keywords and The second input file format section contains lines of keywords and any
any associated attributes you might supply. A line beginning with `#' associated attributes you might supply. A line beginning with `#' in
in the first column is considered a comment. Everything following the the first column is considered a comment. Everything following the `#'
`#' is ignored, up to and including the following newline. A line is ignored, up to and including the following newline. A line
beginning with `%' in the first column is an option declaration and beginning with `%' in the first column is an option declaration and
must not occur within the keywords section. must not occur within the keywords section.
@@ -959,10 +964,10 @@ attributes.
 
File: gperf.info, Node: Functions, Next: Controls for GNU indent, Prev: Keywords, Up: Input Format File: gperf.info, Node: Functions, Next: Controls for GNU indent, Prev: Keywords, Up: Input Format
Including Additional C Functions 3.1.3 Including Additional C Functions
-------------------------------- --------------------------------------
The optional third section also corresponds closely with conventions The optional third section also corresponds closely with conventions
found in `flex' and `bison'. All text in this section, starting at the found in `flex' and `bison'. All text in this section, starting at the
final `%%' and extending to the end of the input file, is included final `%%' and extending to the end of the input file, is included
verbatim into the generated output file. Naturally, it is your verbatim into the generated output file. Naturally, it is your
@@ -972,10 +977,10 @@ valid C.
 
File: gperf.info, Node: Controls for GNU indent, Prev: Functions, Up: Input Format File: gperf.info, Node: Controls for GNU indent, Prev: Functions, Up: Input Format
Where to place directives for GNU `indent'. 3.1.4 Where to place directives for GNU `indent'.
------------------------------------------- -------------------------------------------------
If you want to invoke GNU `indent' on a `gperf' input file, you will If you want to invoke GNU `indent' on a `gperf' input file, you will
see that GNU `indent' doesn't understand the `%%', `%{' and `%}' see that GNU `indent' doesn't understand the `%%', `%{' and `%}'
directives that control `gperf''s interpretation of the input file. directives that control `gperf''s interpretation of the input file.
Therefore you have to insert some directives for GNU `indent'. More Therefore you have to insert some directives for GNU `indent'. More
@@ -1010,17 +1015,17 @@ you would insert `*INDENT-OFF*' and `*INDENT-ON*' comments as follows:
 
File: gperf.info, Node: Output Format, Next: Binary Strings, Prev: Input Format, Up: Description File: gperf.info, Node: Output Format, Next: Binary Strings, Prev: Input Format, Up: Description
Output Format for Generated C Code with `gperf' 3.2 Output Format for Generated C Code with `gperf'
=============================================== ===================================================
Several options control how the generated C code appears on the Several options control how the generated C code appears on the standard
standard output. Two C function are generated. They are called `hash' output. Two C function are generated. They are called `hash' and
and `in_word_set', although you may modify their names with a `in_word_set', although you may modify their names with a command-line
command-line option. Both functions require two arguments, a string, option. Both functions require two arguments, a string, `char *' STR,
`char *' STR, and a length parameter, `int' LEN. Their default and a length parameter, `int' LEN. Their default function prototypes
function prototypes are as follows: are as follows:
- Funktion: unsigned int hash (const char * STR, unsigned int LEN) -- Function: unsigned int hash (const char * STR, unsigned int LEN)
By default, the generated `hash' function returns an integer value By default, the generated `hash' function returns an integer value
created by adding LEN to several user-specified STR byte positions created by adding LEN to several user-specified STR byte positions
indexed into an "associated values" table stored in a local static indexed into an "associated values" table stored in a local static
@@ -1030,7 +1035,7 @@ function prototypes are as follows:
STR) are specified via the `-k' option when running `gperf', as STR) are specified via the `-k' option when running `gperf', as
detailed in the _Options_ section below (*note Options::). detailed in the _Options_ section below (*note Options::).
- Funktion: in_word_set (const char * STR, unsigned int LEN) -- Function: in_word_set (const char * STR, unsigned int LEN)
If STR is in the keyword set, returns a pointer to that keyword. If STR is in the keyword set, returns a pointer to that keyword.
More exactly, if the option `-t' (or, equivalently, the More exactly, if the option `-t' (or, equivalently, the
`%struct-type' declaration) was given, it returns a pointer to the `%struct-type' declaration) was given, it returns a pointer to the
@@ -1068,14 +1073,14 @@ set characteristics.
 
File: gperf.info, Node: Binary Strings, Prev: Output Format, Up: Description File: gperf.info, Node: Binary Strings, Prev: Output Format, Up: Description
Use of NUL bytes 3.3 Use of NUL bytes
================ ====================
By default, the code generated by `gperf' operates on zero By default, the code generated by `gperf' operates on zero terminated
terminated strings, the usual representation of strings in C. This strings, the usual representation of strings in C. This means that the
means that the keywords in the input file must not contain NUL bytes, keywords in the input file must not contain NUL bytes, and the STR
and the STR argument passed to `hash' or `in_word_set' must be NUL argument passed to `hash' or `in_word_set' must be NUL terminated and
terminated and have exactly length LEN. have exactly length LEN.
If option `-c' (or, equivalently, the `%compare-strncmp' If option `-c' (or, equivalently, the `%compare-strncmp'
declaration) is used, then the STR argument does not need to be NUL declaration) is used, then the STR argument does not need to be NUL
@@ -1093,10 +1098,10 @@ equivalently, the `%compare-strncmp' declaration) is ignored.
 
File: gperf.info, Node: Options, Next: Bugs, Prev: Description, Up: Top File: gperf.info, Node: Options, Next: Bugs, Prev: Description, Up: Top
Invoking `gperf' 4 Invoking `gperf'
**************** ******************
There are _many_ options to `gperf'. They were added to make the There are _many_ options to `gperf'. They were added to make the
program more convenient for use with real applications. "On-line" help program more convenient for use with real applications. "On-line" help
is readily available via the `--help' option. Here is the complete is readily available via the `--help' option. Here is the complete
list of options. list of options.
@@ -1113,8 +1118,8 @@ list of options.
 
File: gperf.info, Node: Output File, Next: Input Details, Prev: Options, Up: Options File: gperf.info, Node: Output File, Next: Input Details, Prev: Options, Up: Options
Specifying the Location of the Output File 4.1 Specifying the Location of the Output File
========================================== ==============================================
`--output-file=FILE' `--output-file=FILE'
Allows you to specify the name of the file to which the output is Allows you to specify the name of the file to which the output is
@@ -1126,10 +1131,10 @@ specified or if it is `-'.
 
File: gperf.info, Node: Input Details, Next: Output Language, Prev: Output File, Up: Options File: gperf.info, Node: Input Details, Next: Output Language, Prev: Output File, Up: Options
Options that affect Interpretation of the Input File 4.2 Options that affect Interpretation of the Input File
==================================================== ========================================================
These options are also available as declarations in the input file These options are also available as declarations in the input file
(*note Gperf Declarations::). (*note Gperf Declarations::).
`-e KEYWORD-DELIMITER-LIST' `-e KEYWORD-DELIMITER-LIST'
@@ -1165,10 +1170,10 @@ Options that affect Interpretation of the Input File
 
File: gperf.info, Node: Output Language, Next: Output Details, Prev: Input Details, Up: Options File: gperf.info, Node: Output Language, Next: Output Details, Prev: Input Details, Up: Options
Options to specify the Language for the Output Code 4.3 Options to specify the Language for the Output Code
=================================================== =======================================================
These options are also available as declarations in the input file These options are also available as declarations in the input file
(*note Gperf Declarations::). (*note Gperf Declarations::).
`-L GENERATED-LANGUAGE-NAME' `-L GENERATED-LANGUAGE-NAME'
@@ -1207,11 +1212,11 @@ Options to specify the Language for the Output Code
 
File: gperf.info, Node: Output Details, Next: Algorithmic Details, Prev: Output Language, Up: Options File: gperf.info, Node: Output Details, Next: Algorithmic Details, Prev: Output Language, Up: Options
Options for fine tuning Details in the Output Code 4.4 Options for fine tuning Details in the Output Code
================================================== ======================================================
Most of these options are also available as declarations in the Most of these options are also available as declarations in the input
input file (*note Gperf Declarations::). file (*note Gperf Declarations::).
`-K SLOT-NAME' `-K SLOT-NAME'
`--slot-name=SLOT-NAME' `--slot-name=SLOT-NAME'
@@ -1338,6 +1343,13 @@ input file (*note Gperf Declarations::).
the use of two hash tables in the same file, even when the option the use of two hash tables in the same file, even when the option
`-G' (or, equivalently, the `%global-table' declaration) is given. `-G' (or, equivalently, the `%global-table' declaration) is given.
`--length-table-name=LENGTH-TABLE-ARRAY-NAME'
Allows you to specify the name for the generated array containing
the length table. Default name is `lengthtable'. This option
permits the use of two length tables in the same file, even when
the option `-G' (or, equivalently, the `%global-table'
declaration) is given.
`-S TOTAL-SWITCH-STATEMENTS' `-S TOTAL-SWITCH-STATEMENTS'
`--switch=TOTAL-SWITCH-STATEMENTS' `--switch=TOTAL-SWITCH-STATEMENTS'
Causes the generated C code to use a `switch' statement scheme, Causes the generated C code to use a `switch' statement scheme,
@@ -1363,8 +1375,8 @@ input file (*note Gperf Declarations::).
 
File: gperf.info, Node: Algorithmic Details, Next: Verbosity, Prev: Output Details, Up: Options File: gperf.info, Node: Algorithmic Details, Next: Verbosity, Prev: Output Details, Up: Options
Options for changing the Algorithms employed by `gperf' 4.5 Options for changing the Algorithms employed by `gperf'
======================================================= ===========================================================
`-k SELECTED-BYTE-POSITIONS' `-k SELECTED-BYTE-POSITIONS'
`--key-positions=SELECTED-BYTE-POSITIONS' `--key-positions=SELECTED-BYTE-POSITIONS'
@@ -1472,8 +1484,8 @@ Options for changing the Algorithms employed by `gperf'
 
File: gperf.info, Node: Verbosity, Prev: Algorithmic Details, Up: Options File: gperf.info, Node: Verbosity, Prev: Algorithmic Details, Up: Options
Informative Output 4.6 Informative Output
================== ======================
`-h' `-h'
`--help' `--help'
@@ -1496,11 +1508,10 @@ Informative Output
 
File: gperf.info, Node: Bugs, Next: Projects, Prev: Options, Up: Top File: gperf.info, Node: Bugs, Next: Projects, Prev: Options, Up: Top
Known Bugs and Limitations with `gperf' 5 Known Bugs and Limitations with `gperf'
*************************************** *****************************************
The following are some limitations with the current release of The following are some limitations with the current release of `gperf':
`gperf':
* The `gperf' utility is tuned to execute quickly, and works quickly * The `gperf' utility is tuned to execute quickly, and works quickly
for small to medium size data sets (around 1000 keywords). It is for small to medium size data sets (around 1000 keywords). It is
@@ -1529,10 +1540,10 @@ Known Bugs and Limitations with `gperf'
 
File: gperf.info, Node: Projects, Next: Bibliography, Prev: Bugs, Up: Top File: gperf.info, Node: Projects, Next: Bibliography, Prev: Bugs, Up: Top
Things Still Left to Do 6 Things Still Left to Do
*********************** *************************
It should be "relatively" easy to replace the current perfect hash It should be "relatively" easy to replace the current perfect hash
function algorithm with a more exhaustive approach; the perfect hash function algorithm with a more exhaustive approach; the perfect hash
module is essential independent from other program modules. Additional module is essential independent from other program modules. Additional
worthwhile improvements include: worthwhile improvements include:
@@ -1554,10 +1565,10 @@ worthwhile improvements include:
 
File: gperf.info, Node: Bibliography, Next: Concept Index, Prev: Projects, Up: Top File: gperf.info, Node: Bibliography, Next: Concept Index, Prev: Projects, Up: Top
Bibliography 7 Bibliography
************ **************
[1] Chang, C.C.: A Scheme for Constructing Ordered Minimal Perfect [1] Chang, C.C.: A Scheme for Constructing Ordered Minimal Perfect
Hashing Functions Information Sciences 39(1986), 187-195. Hashing Functions Information Sciences 39(1986), 187-195.
[2] Cichelli, Richard J. Author's Response to "On Cichelli's Minimal [2] Cichelli, Richard J. Author's Response to "On Cichelli's Minimal
@@ -1612,83 +1623,86 @@ File: gperf.info, Node: Concept Index, Prev: Bibliography, Up: Top
Concept Index Concept Index
************* *************
[index]
* Menu: * Menu:
* %%: User-supplied Struct. * %%: User-supplied Struct.
* %7bit: Gperf Declarations. (line 33)
* %compare-lengths: Gperf Declarations. * %7bit: Gperf Declarations. (line 95)
* %compare-strncmp: Gperf Declarations. * %compare-lengths: Gperf Declarations. (line 103)
* %define class-name: Gperf Declarations. * %compare-strncmp: Gperf Declarations. (line 115)
* %define hash-function-name: Gperf Declarations. * %define class-name: Gperf Declarations. (line 89)
* %define initializer-suffix: Gperf Declarations. * %define hash-function-name: Gperf Declarations. (line 79)
* %define lookup-function-name: Gperf Declarations. * %define initializer-suffix: Gperf Declarations. (line 71)
* %define slot-name: Gperf Declarations. * %define length-table-name: Gperf Declarations. (line 173)
* %define string-pool-name: Gperf Declarations. * %define lookup-function-name: Gperf Declarations. (line 84)
* %define word-array-name: Gperf Declarations. * %define slot-name: Gperf Declarations. (line 63)
* %delimiters: Gperf Declarations. * %define string-pool-name: Gperf Declarations. (line 152)
* %enum: Gperf Declarations. * %define word-array-name: Gperf Declarations. (line 167)
* %global-table: Gperf Declarations. * %delimiters: Gperf Declarations. (line 24)
* %ignore-case: Gperf Declarations. * %enum: Gperf Declarations. (line 124)
* %includes: Gperf Declarations. * %global-table: Gperf Declarations. (line 135)
* %language: Gperf Declarations. * %ignore-case: Gperf Declarations. (line 34)
* %null-strings: Gperf Declarations. * %includes: Gperf Declarations. (line 130)
* %omit-struct-type: Gperf Declarations. * %language: Gperf Declarations. (line 39)
* %pic: Gperf Declarations. * %null-strings: Gperf Declarations. (line 160)
* %readonly-tables: Gperf Declarations. * %omit-struct-type: Gperf Declarations. (line 192)
* %struct-type: Gperf Declarations. * %pic: Gperf Declarations. (line 140)
* %switch: Gperf Declarations. * %readonly-tables: Gperf Declarations. (line 119)
* %{: C Code Inclusion. * %struct-type: Gperf Declarations. (line 30)
* %}: C Code Inclusion. * %switch: Gperf Declarations. (line 180)
* Array name: Output Details. * %{: C Code Inclusion. (line 6)
* Bugs: Contributors. * %}: C Code Inclusion. (line 6)
* Class name: Output Details. * Array name: Output Details. (line 129)
* Declaration section: Input Format. * Bugs: Contributors. (line 6)
* Delimiters: Input Details. * Class name: Output Details. (line 41)
* Duplicates: Algorithmic Details. * Declaration section: Input Format. (line 6)
* Format: Input Format. * Delimiters: Input Details. (line 11)
* Functions section: Input Format. * Duplicates: Algorithmic Details. (line 32)
* hash: Output Format. * Format: Input Format. (line 6)
* hash table: Output Format. * Functions section: Input Format. (line 6)
* in_word_set: Output Format. * hash: Output Format. (line 14)
* Initializers: Output Details. * hash table: Output Format. (line 6)
* Jump value: Algorithmic Details. * in_word_set: Output Format. (line 24)
* Keywords section: Input Format. * Initializers: Output Details. (line 20)
* Minimal perfect hash functions: Search Structures. * Jump value: Algorithmic Details. (line 63)
* NUL: Binary Strings. * Keywords section: Input Format. (line 6)
* Slot name: Output Details. * Minimal perfect hash functions: Search Structures. (line 30)
* Static search structure: Search Structures. * NUL: Binary Strings. (line 6)
* switch <1>: Output Details. * Slot name: Output Details. (line 11)
* switch: Output Format. * Static search structure: Search Structures. (line 6)
* switch <1>: Output Details. (line 143)
* switch: Output Format. (line 44)
 
Tag Table: Tag Table:
Node: Top1240 Node: Top1236
Node: Copying3324 Node: Copying3317
Node: Contributors22513 Node: Contributors22474
Node: Motivation23706 Node: Motivation23667
Node: Search Structures24834 Node: Search Structures24796
Node: Description28389 Node: Description28352
Node: Input Format30282 Node: Input Format30249
Node: Declarations31419 Node: Declarations31391
Node: User-supplied Struct31995 Node: User-supplied Struct31976
Node: Gperf Declarations33594 Node: Gperf Declarations33588
Node: C Code Inclusion42004 Node: C Code Inclusion42342
Node: Keywords42831 Node: Keywords43182
Node: Functions44767 Node: Functions45127
Node: Controls for GNU indent45293 Node: Controls for GNU indent45662
Node: Output Format46232 Node: Output Format46610
Node: Binary Strings49016 Node: Binary Strings49401
Node: Options50159 Node: Options50549
Node: Output File50944 Node: Output File51335
Node: Input Details51328 Node: Input Details51727
Node: Output Language53159 Node: Output Language53563
Node: Output Details54570 Node: Output Details54979
Node: Algorithmic Details61485 Node: Algorithmic Details62243
Node: Verbosity66734 Node: Verbosity67500
Node: Bugs67437 Node: Bugs68211
Node: Projects69029 Node: Projects69804
Node: Bibliography70157 Node: Bibliography70933
Node: Concept Index72213 Node: Concept Index72990
 
End Tag Table End Tag Table

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@@ -7,7 +7,7 @@
@c some day we should @include version.texi instead of defining @c some day we should @include version.texi instead of defining
@c these values at hand. @c these values at hand.
@set UPDATED 30 July 2005 @set UPDATED 13 January 2006
@set EDITION 3.0.2 @set EDITION 3.0.2
@set VERSION 3.0.2 @set VERSION 3.0.2
@c --------------------- @c ---------------------

39
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@@ -1,6 +1,7 @@
<HTML> <HTML>
<HEAD> <HEAD>
<!-- Created by texi2html 1.56k from gperf.texi on 12 June 2003 --> <!-- This HTML file has been created by texi2html 1.52
from gperf.texi on 13 January 2006 -->
<TITLE>Perfect Hash Function Generator - GNU GENERAL PUBLIC LICENSE</TITLE> <TITLE>Perfect Hash Function Generator - GNU GENERAL PUBLIC LICENSE</TITLE>
</HEAD> </HEAD>
@@ -14,7 +15,7 @@ Go to the first, previous, <A HREF="gperf_2.html">next</A>, <A HREF="gperf_10.ht
<P> <P>
Version 2, June 1991 Version 2, June 1991
</P>
<PRE> <PRE>
Copyright (C) 1989, 1991 Free Software Foundation, Inc., Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
@@ -39,7 +40,7 @@ using it. (Some other Free Software Foundation software is covered by
the GNU Library General Public License instead.) You can apply it to the GNU Library General Public License instead.) You can apply it to
your programs, too. your programs, too.
</P>
<P> <P>
When we speak of free software, we are referring to freedom, not When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you price. Our General Public Licenses are designed to make sure that you
@@ -48,14 +49,14 @@ this service if you wish), that you receive source code or can get it
if you want it, that you can change the software or use pieces of it if you want it, that you can change the software or use pieces of it
in new free programs; and that you know you can do these things. in new free programs; and that you know you can do these things.
</P>
<P> <P>
To protect your rights, we need to make restrictions that forbid To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights. anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it. distribute copies of the software, or if you modify it.
</P>
<P> <P>
For example, if you distribute copies of such a program, whether For example, if you distribute copies of such a program, whether
gratis or for a fee, you must give the recipients all the rights that gratis or for a fee, you must give the recipients all the rights that
@@ -63,13 +64,13 @@ you have. You must make sure that they, too, receive or can get the
source code. And you must show them these terms so they know their source code. And you must show them these terms so they know their
rights. rights.
</P>
<P> <P>
We protect your rights with two steps: (1) copyright the software, and We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy, (2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software. distribute and/or modify the software.
</P>
<P> <P>
Also, for each author's protection and ours, we want to make certain Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free that everyone understands that there is no warranty for this free
@@ -78,7 +79,7 @@ want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original that any problems introduced by others will not reflect on the original
authors' reputations. authors' reputations.
</P>
<P> <P>
Finally, any free program is threatened constantly by software Finally, any free program is threatened constantly by software
patents. We wish to avoid the danger that redistributors of a free patents. We wish to avoid the danger that redistributors of a free
@@ -86,16 +87,16 @@ program will individually obtain patent licenses, in effect making the
program proprietary. To prevent this, we have made it clear that any program proprietary. To prevent this, we have made it clear that any
patent must be licensed for everyone's free use or not licensed at all. patent must be licensed for everyone's free use or not licensed at all.
</P>
<P> <P>
The precise terms and conditions for copying, distribution and The precise terms and conditions for copying, distribution and
modification follow. modification follow.
</P>
<P> <P>
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
</P>
<OL> <OL>
<LI> <LI>
@@ -364,7 +365,7 @@ POSSIBILITY OF SUCH DAMAGES.
<P> <P>
END OF TERMS AND CONDITIONS END OF TERMS AND CONDITIONS
</P>
<H2><A NAME="SEC3" HREF="gperf_toc.html#TOC3">How to Apply These Terms to Your New Programs</A></H2> <H2><A NAME="SEC3" HREF="gperf_toc.html#TOC3">How to Apply These Terms to Your New Programs</A></H2>
@@ -374,14 +375,14 @@ END OF TERMS AND CONDITIONS
possible use to the public, the best way to achieve this is to make it possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms. free software which everyone can redistribute and change under these terms.
</P>
<P> <P>
To do so, attach the following notices to the program. It is safest To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found. the "copyright" line and a pointer to where the full notice is found.
</P>
<PRE> <PRE>
<VAR>one line to give the program's name and an idea of what it does.</VAR> <VAR>one line to give the program's name and an idea of what it does.</VAR>
@@ -405,12 +406,12 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
<P> <P>
Also add information on how to contact you by electronic and paper mail. Also add information on how to contact you by electronic and paper mail.
</P>
<P> <P>
If the program is interactive, make it output a short notice like this If the program is interactive, make it output a short notice like this
when it starts in an interactive mode: when it starts in an interactive mode:
</P>
<PRE> <PRE>
Gnomovision version 69, Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR> Gnomovision version 69, Copyright (C) <VAR>year</VAR> <VAR>name of author</VAR>
@@ -427,13 +428,13 @@ commands you use may be called something other than <SAMP>`show w'</SAMP> and
<SAMP>`show c'</SAMP>; they could even be mouse-clicks or menu items--whatever <SAMP>`show c'</SAMP>; they could even be mouse-clicks or menu items--whatever
suits your program. suits your program.
</P>
<P> <P>
You should also get your employer (if you work as a programmer) or your You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names: necessary. Here is a sample; alter the names:
</P>
<PRE> <PRE>
Yoyodyne, Inc., hereby disclaims all copyright Yoyodyne, Inc., hereby disclaims all copyright
@@ -452,7 +453,7 @@ consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Library General library. If this is what you want to do, use the GNU Library General
Public License instead of this License. Public License instead of this License.
</P>
<P><HR><P> <P><HR><P>
Go to the first, previous, <A HREF="gperf_2.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>. Go to the first, previous, <A HREF="gperf_2.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>.
</BODY> </BODY>

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@@ -1,6 +1,7 @@
<HTML> <HTML>
<HEAD> <HEAD>
<!-- Created by texi2html 1.56k from gperf.texi on 12 June 2003 --> <!-- This HTML file has been created by texi2html 1.52
from gperf.texi on 13 January 2006 -->
<TITLE>Perfect Hash Function Generator - Concept Index</TITLE> <TITLE>Perfect Hash Function Generator - Concept Index</TITLE>
</HEAD> </HEAD>
@@ -48,6 +49,7 @@ Jump to:
<LI><A HREF="gperf_5.html#IDX17"><SAMP>`%define class-name'</SAMP></A> <LI><A HREF="gperf_5.html#IDX17"><SAMP>`%define class-name'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX15"><SAMP>`%define hash-function-name'</SAMP></A> <LI><A HREF="gperf_5.html#IDX15"><SAMP>`%define hash-function-name'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX14"><SAMP>`%define initializer-suffix'</SAMP></A> <LI><A HREF="gperf_5.html#IDX14"><SAMP>`%define initializer-suffix'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX29"><SAMP>`%define length-table-name'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX16"><SAMP>`%define lookup-function-name'</SAMP></A> <LI><A HREF="gperf_5.html#IDX16"><SAMP>`%define lookup-function-name'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX13"><SAMP>`%define slot-name'</SAMP></A> <LI><A HREF="gperf_5.html#IDX13"><SAMP>`%define slot-name'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX26"><SAMP>`%define string-pool-name'</SAMP></A> <LI><A HREF="gperf_5.html#IDX26"><SAMP>`%define string-pool-name'</SAMP></A>
@@ -59,17 +61,17 @@ Jump to:
<LI><A HREF="gperf_5.html#IDX23"><SAMP>`%includes'</SAMP></A> <LI><A HREF="gperf_5.html#IDX23"><SAMP>`%includes'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX12"><SAMP>`%language'</SAMP></A> <LI><A HREF="gperf_5.html#IDX12"><SAMP>`%language'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX27"><SAMP>`%null-strings'</SAMP></A> <LI><A HREF="gperf_5.html#IDX27"><SAMP>`%null-strings'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX30"><SAMP>`%omit-struct-type'</SAMP></A> <LI><A HREF="gperf_5.html#IDX31"><SAMP>`%omit-struct-type'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX25"><SAMP>`%pic'</SAMP></A> <LI><A HREF="gperf_5.html#IDX25"><SAMP>`%pic'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX21"><SAMP>`%readonly-tables'</SAMP></A> <LI><A HREF="gperf_5.html#IDX21"><SAMP>`%readonly-tables'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX10"><SAMP>`%struct-type'</SAMP></A> <LI><A HREF="gperf_5.html#IDX10"><SAMP>`%struct-type'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX29"><SAMP>`%switch'</SAMP></A> <LI><A HREF="gperf_5.html#IDX30"><SAMP>`%switch'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX31"><SAMP>`%{'</SAMP></A> <LI><A HREF="gperf_5.html#IDX32"><SAMP>`%{'</SAMP></A>
<LI><A HREF="gperf_5.html#IDX32"><SAMP>`%}'</SAMP></A> <LI><A HREF="gperf_5.html#IDX33"><SAMP>`%}'</SAMP></A>
</DIR> </DIR>
<H2><A NAME="cindex_a">a</A></H2> <H2><A NAME="cindex_a">a</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_6.html#IDX42">Array name</A> <LI><A HREF="gperf_6.html#IDX43">Array name</A>, <A HREF="gperf_6.html#IDX44">Array name</A>
</DIR> </DIR>
<H2><A NAME="cindex_b">b</A></H2> <H2><A NAME="cindex_b">b</A></H2>
<DIR> <DIR>
@@ -77,13 +79,13 @@ Jump to:
</DIR> </DIR>
<H2><A NAME="cindex_c">c</A></H2> <H2><A NAME="cindex_c">c</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_6.html#IDX41">Class name</A> <LI><A HREF="gperf_6.html#IDX42">Class name</A>
</DIR> </DIR>
<H2><A NAME="cindex_d">d</A></H2> <H2><A NAME="cindex_d">d</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_5.html#IDX5">Declaration section</A> <LI><A HREF="gperf_5.html#IDX5">Declaration section</A>
<LI><A HREF="gperf_6.html#IDX38">Delimiters</A> <LI><A HREF="gperf_6.html#IDX39">Delimiters</A>
<LI><A HREF="gperf_6.html#IDX44">Duplicates</A> <LI><A HREF="gperf_6.html#IDX46">Duplicates</A>
</DIR> </DIR>
<H2><A NAME="cindex_f">f</A></H2> <H2><A NAME="cindex_f">f</A></H2>
<DIR> <DIR>
@@ -92,17 +94,17 @@ Jump to:
</DIR> </DIR>
<H2><A NAME="cindex_h">h</A></H2> <H2><A NAME="cindex_h">h</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_5.html#IDX34">hash</A> <LI><A HREF="gperf_5.html#IDX35">hash</A>
<LI><A HREF="gperf_5.html#IDX33">hash table</A> <LI><A HREF="gperf_5.html#IDX34">hash table</A>
</DIR> </DIR>
<H2><A NAME="cindex_i">i</A></H2> <H2><A NAME="cindex_i">i</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_5.html#IDX35">in_word_set</A> <LI><A HREF="gperf_5.html#IDX36">in_word_set</A>
<LI><A HREF="gperf_6.html#IDX40">Initializers</A> <LI><A HREF="gperf_6.html#IDX41">Initializers</A>
</DIR> </DIR>
<H2><A NAME="cindex_j">j</A></H2> <H2><A NAME="cindex_j">j</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_6.html#IDX45">Jump value</A> <LI><A HREF="gperf_6.html#IDX47">Jump value</A>
</DIR> </DIR>
<H2><A NAME="cindex_k">k</A></H2> <H2><A NAME="cindex_k">k</A></H2>
<DIR> <DIR>
@@ -114,16 +116,16 @@ Jump to:
</DIR> </DIR>
<H2><A NAME="cindex_n">n</A></H2> <H2><A NAME="cindex_n">n</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_5.html#IDX37">NUL</A> <LI><A HREF="gperf_5.html#IDX38">NUL</A>
</DIR> </DIR>
<H2><A NAME="cindex_s">s</A></H2> <H2><A NAME="cindex_s">s</A></H2>
<DIR> <DIR>
<LI><A HREF="gperf_6.html#IDX39">Slot name</A> <LI><A HREF="gperf_6.html#IDX40">Slot name</A>
<LI><A HREF="gperf_4.html#IDX2">Static search structure</A> <LI><A HREF="gperf_4.html#IDX2">Static search structure</A>
<LI><A HREF="gperf_5.html#IDX36"><CODE>switch</CODE></A>, <A HREF="gperf_6.html#IDX43"><CODE>switch</CODE></A> <LI><A HREF="gperf_5.html#IDX37"><CODE>switch</CODE></A>, <A HREF="gperf_6.html#IDX45"><CODE>switch</CODE></A>
</DIR> </DIR>
</P>
<P><HR><P> <P><HR><P>
Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_9.html">previous</A>, next, last section, <A HREF="gperf_toc.html">table of contents</A>. Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_9.html">previous</A>, next, last section, <A HREF="gperf_toc.html">table of contents</A>.
</BODY> </BODY>

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@@ -1,6 +1,7 @@
<HTML> <HTML>
<HEAD> <HEAD>
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<TITLE>Perfect Hash Function Generator - 1. Introduction</TITLE> <TITLE>Perfect Hash Function Generator - 1 Introduction</TITLE>
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<H1><A NAME="SEC5" HREF="gperf_toc.html#TOC5">1. Introduction</A></H1> <H1><A NAME="SEC5" HREF="gperf_toc.html#TOC5">1 Introduction</A></H1>
<P> <P>
<CODE>gperf</CODE> is a perfect hash function generator written in C++. It <CODE>gperf</CODE> is a perfect hash function generator written in C++. It
@@ -22,7 +23,7 @@ pair of C functions. These functions determine whether a given
character string <VAR>s</VAR> occurs in <VAR>W</VAR>, using at most one probe into character string <VAR>s</VAR> occurs in <VAR>W</VAR>, using at most one probe into
the lookup table. the lookup table.
</P>
<P> <P>
<CODE>gperf</CODE> currently generates the reserved keyword recognizer for <CODE>gperf</CODE> currently generates the reserved keyword recognizer for
lexical analyzers in several production and research compilers and lexical analyzers in several production and research compilers and
@@ -33,7 +34,7 @@ A paper describing <CODE>gperf</CODE>'s design and implementation in greater
detail is available in the Second USENIX C++ Conference proceedings detail is available in the Second USENIX C++ Conference proceedings
or from <CODE>http://www.cs.wustl.edu/~schmidt/resume.html</CODE>. or from <CODE>http://www.cs.wustl.edu/~schmidt/resume.html</CODE>.
</P>
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<TITLE>Perfect Hash Function Generator - 2. Static search structures and GNU gperf</TITLE> <TITLE>Perfect Hash Function Generator - 2 Static search structures and GNU gperf</TITLE>
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<H1><A NAME="SEC6" HREF="gperf_toc.html#TOC6">2. Static search structures and GNU <CODE>gperf</CODE></A></H1> <H1><A NAME="SEC6" HREF="gperf_toc.html#TOC6">2 Static search structures and GNU <CODE>gperf</CODE></A></H1>
<P> <P>
<A NAME="IDX2"></A> <A NAME="IDX2"></A>
</P>
<P> <P>
A <EM>static search structure</EM> is an Abstract Data Type with certain A <EM>static search structure</EM> is an Abstract Data Type with certain
fundamental operations, e.g., <EM>initialize</EM>, <EM>insert</EM>, fundamental operations, e.g., <EM>initialize</EM>, <EM>insert</EM>,
@@ -29,7 +30,7 @@ commands. Search set members, called <EM>keywords</EM>, are inserted into
the structure only once, usually during program initialization, and are the structure only once, usually during program initialization, and are
not generally modified at run-time. not generally modified at run-time.
</P>
<P> <P>
Numerous static search structure implementations exist, e.g., Numerous static search structure implementations exist, e.g.,
arrays, linked lists, binary search trees, digital search tries, and arrays, linked lists, binary search trees, digital search tries, and
@@ -41,14 +42,14 @@ proportional to log <VAR>n</VAR>. Conversely, hash table implementations
often locate a table entry in constant time, but typically impose often locate a table entry in constant time, but typically impose
additional memory overhead and exhibit poor worst case performance. additional memory overhead and exhibit poor worst case performance.
</P>
<P> <P>
<A NAME="IDX3"></A> <A NAME="IDX3"></A>
<EM>Minimal perfect hash functions</EM> provide an optimal solution for a <EM>Minimal perfect hash functions</EM> provide an optimal solution for a
particular class of static search sets. A minimal perfect hash particular class of static search sets. A minimal perfect hash
function is defined by two properties: function is defined by two properties:
</P>
<UL> <UL>
<LI> <LI>
@@ -74,7 +75,7 @@ behavior generates <EM>near-minimal</EM> perfect hash functions for
keyword sets. However, <CODE>gperf</CODE> provides many options that permit keyword sets. However, <CODE>gperf</CODE> provides many options that permit
user control over the degree of minimality and perfection. user control over the degree of minimality and perfection.
</P>
<P> <P>
Static search sets often exhibit relative stability over time. For Static search sets often exhibit relative stability over time. For
example, Ada's 63 reserved words have remained constant for nearly a example, Ada's 63 reserved words have remained constant for nearly a
@@ -90,7 +91,7 @@ not yet part of the official GNU distribution. Each compiler utilizes
<CODE>gperf</CODE> to automatically generate static search structures that <CODE>gperf</CODE> to automatically generate static search structures that
efficiently identify their respective reserved keywords. efficiently identify their respective reserved keywords.
</P>
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<TITLE>Perfect Hash Function Generator - 3. High-Level Description of GNU gperf</TITLE> <TITLE>Perfect Hash Function Generator - 3 High-Level Description of GNU gperf</TITLE>
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<H1><A NAME="SEC7" HREF="gperf_toc.html#TOC7">3. High-Level Description of GNU <CODE>gperf</CODE></A></H1> <H1><A NAME="SEC7" HREF="gperf_toc.html#TOC7">3 High-Level Description of GNU <CODE>gperf</CODE></A></H1>
<P> <P>
The perfect hash function generator <CODE>gperf</CODE> reads a set of The perfect hash function generator <CODE>gperf</CODE> reads a set of
@@ -22,7 +23,7 @@ that perform hashing and table lookup recognition. All generated C code
is directed to the standard output. Command-line options described is directed to the standard output. Command-line options described
below allow you to modify the input and output format to <CODE>gperf</CODE>. below allow you to modify the input and output format to <CODE>gperf</CODE>.
</P>
<P> <P>
By default, <CODE>gperf</CODE> attempts to produce time-efficient code, with By default, <CODE>gperf</CODE> attempts to produce time-efficient code, with
less emphasis on efficient space utilization. However, several options less emphasis on efficient space utilization. However, several options
@@ -34,7 +35,7 @@ statement scheme that minimizes data space storage size. Furthermore,
using a C <CODE>switch</CODE> may actually speed up the keyword retrieval time using a C <CODE>switch</CODE> may actually speed up the keyword retrieval time
somewhat. Actual results depend on your C compiler, of course. somewhat. Actual results depend on your C compiler, of course.
</P>
<P> <P>
In general, <CODE>gperf</CODE> assigns values to the bytes it is using In general, <CODE>gperf</CODE> assigns values to the bytes it is using
for hashing until some set of values gives each keyword a unique value. for hashing until some set of values gives each keyword a unique value.
@@ -42,7 +43,7 @@ A helpful heuristic is that the larger the hash value range, the easier
it is for <CODE>gperf</CODE> to find and generate a perfect hash function. it is for <CODE>gperf</CODE> to find and generate a perfect hash function.
Experimentation is the key to getting the most from <CODE>gperf</CODE>. Experimentation is the key to getting the most from <CODE>gperf</CODE>.
</P>
<H2><A NAME="SEC8" HREF="gperf_toc.html#TOC8">3.1 Input Format to <CODE>gperf</CODE></A></H2> <H2><A NAME="SEC8" HREF="gperf_toc.html#TOC8">3.1 Input Format to <CODE>gperf</CODE></A></H2>
@@ -57,7 +58,7 @@ is similar to GNU utilities <CODE>flex</CODE> and <CODE>bison</CODE> (or UNIX
utilities <CODE>lex</CODE> and <CODE>yacc</CODE>). Here's an outline of the general utilities <CODE>lex</CODE> and <CODE>yacc</CODE>). Here's an outline of the general
format: format:
</P>
<PRE> <PRE>
declarations declarations
@@ -72,13 +73,14 @@ functions
the functions section are optional. The following sections describe the the functions section are optional. The following sections describe the
input format for each section. input format for each section.
</P>
<P> <P>
It is possible to omit the declaration section entirely, if the <SAMP>`-t'</SAMP> It is possible to omit the declaration section entirely, if the <SAMP>`-t'</SAMP>
option is not given. In this case the input file begins directly with the option is not given. In this case the input file begins directly with the
first keyword line, e.g.: first keyword line, e.g.:
</P>
<PRE> <PRE>
january january
@@ -98,6 +100,7 @@ arbitrary C declarations and definitions, <CODE>gperf</CODE> declarations that
act like command-line options, as well as for providing a user-supplied act like command-line options, as well as for providing a user-supplied
<CODE>struct</CODE>. <CODE>struct</CODE>.
</P>
@@ -114,12 +117,12 @@ This first field must be called <SAMP>`name'</SAMP>, although it is possible to
its name with the <SAMP>`-K'</SAMP> option (or, equivalently, the its name with the <SAMP>`-K'</SAMP> option (or, equivalently, the
<SAMP>`%define slot-name'</SAMP> declaration) described below. <SAMP>`%define slot-name'</SAMP> declaration) described below.
</P>
<P> <P>
Here is a simple example, using months of the year and their attributes as Here is a simple example, using months of the year and their attributes as
input: input:
</P>
<PRE> <PRE>
struct month { char *name; int number; int days; int leap_days; }; struct month { char *name; int number; int days; int leap_days; };
@@ -145,12 +148,12 @@ other fields are a pair of consecutive percent signs, <SAMP>`%%'</SAMP>,
appearing left justified in the first column, as in the UNIX utility appearing left justified in the first column, as in the UNIX utility
<CODE>lex</CODE>. <CODE>lex</CODE>.
</P>
<P> <P>
If the <CODE>struct</CODE> has already been declared in an include file, it can If the <CODE>struct</CODE> has already been declared in an include file, it can
be mentioned in an abbreviated form, like this: be mentioned in an abbreviated form, like this:
</P>
<PRE> <PRE>
struct month; struct month;
@@ -169,7 +172,7 @@ influence the way <CODE>gperf</CODE> works, like command line options do.
In fact, every such declaration is equivalent to a command line option. In fact, every such declaration is equivalent to a command line option.
There are three forms of declarations: There are three forms of declarations:
</P>
<OL> <OL>
<LI> <LI>
@@ -190,11 +193,11 @@ Declarations of names of entities in the output file, like
When a declaration is given both in the input file and as a command line When a declaration is given both in the input file and as a command line
option, the command-line option's value prevails. option, the command-line option's value prevails.
</P>
<P> <P>
The following <CODE>gperf</CODE> declarations are available. The following <CODE>gperf</CODE> declarations are available.
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`%delimiters=<VAR>delimiter-list</VAR>'</SAMP> <DT><SAMP>`%delimiters=<VAR>delimiter-list</VAR>'</SAMP>
@@ -386,9 +389,17 @@ hash table. Default name is <SAMP>`wordlist'</SAMP>. This option permits the
use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP> use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given. (or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`%switch=<VAR>count</VAR>'</SAMP> <DT><SAMP>`%define length-table-name <VAR>name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX29"></A> <A NAME="IDX29"></A>
Allows you to specify the name for the generated array containing the
length table. Default name is <SAMP>`lengthtable'</SAMP>. This option permits the
use of two length tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`%switch=<VAR>count</VAR>'</SAMP>
<DD>
<A NAME="IDX30"></A>
Causes the generated C code to use a <CODE>switch</CODE> statement scheme, Causes the generated C code to use a <CODE>switch</CODE> statement scheme,
rather than an array lookup table. This can lead to a reduction in both rather than an array lookup table. This can lead to a reduction in both
time and space requirements for some input files. The argument to this time and space requirements for some input files. The argument to this
@@ -401,7 +412,7 @@ was inspired in part by Keith Bostic's original C program.
<DT><SAMP>`%omit-struct-type'</SAMP> <DT><SAMP>`%omit-struct-type'</SAMP>
<DD> <DD>
<A NAME="IDX30"></A> <A NAME="IDX31"></A>
Prevents the transfer of the type declaration to the output file. Use Prevents the transfer of the type declaration to the output file. Use
this option if the type is already defined elsewhere. this option if the type is already defined elsewhere.
</DL> </DL>
@@ -411,8 +422,8 @@ this option if the type is already defined elsewhere.
<H4><A NAME="SEC12" HREF="gperf_toc.html#TOC12">3.1.1.3 C Code Inclusion</A></H4> <H4><A NAME="SEC12" HREF="gperf_toc.html#TOC12">3.1.1.3 C Code Inclusion</A></H4>
<P> <P>
<A NAME="IDX31"></A>
<A NAME="IDX32"></A> <A NAME="IDX32"></A>
<A NAME="IDX33"></A>
Using a syntax similar to GNU utilities <CODE>flex</CODE> and <CODE>bison</CODE>, it Using a syntax similar to GNU utilities <CODE>flex</CODE> and <CODE>bison</CODE>, it
is possible to directly include C source text and comments verbatim into is possible to directly include C source text and comments verbatim into
the generated output file. This is accomplished by enclosing the region the generated output file. This is accomplished by enclosing the region
@@ -420,7 +431,7 @@ inside left-justified surrounding <SAMP>`%{'</SAMP>, <SAMP>`%}'</SAMP> pairs. H
an input fragment based on the previous example that illustrates this an input fragment based on the previous example that illustrates this
feature: feature:
</P>
<PRE> <PRE>
%{ %{
@@ -448,7 +459,7 @@ in the first column is considered a comment. Everything following the
beginning with <SAMP>`%'</SAMP> in the first column is an option declaration and beginning with <SAMP>`%'</SAMP> in the first column is an option declaration and
must not occur within the keywords section. must not occur within the keywords section.
</P>
<P> <P>
The first field of each non-comment line is always the keyword itself. It The first field of each non-comment line is always the keyword itself. It
can be given in two ways: as a simple name, i.e., without surrounding can be given in two ways: as a simple name, i.e., without surrounding
@@ -460,7 +471,7 @@ In this context, a "field" is considered to extend up to, but
not include, the first blank, comma, or newline. Here is a simple not include, the first blank, comma, or newline. Here is a simple
example taken from a partial list of C reserved words: example taken from a partial list of C reserved words:
</P>
<PRE> <PRE>
# These are a few C reserved words, see the c.gperf file # These are a few C reserved words, see the c.gperf file
@@ -480,7 +491,7 @@ return
Note that unlike <CODE>flex</CODE> or <CODE>bison</CODE> the first <SAMP>`%%'</SAMP> marker Note that unlike <CODE>flex</CODE> or <CODE>bison</CODE> the first <SAMP>`%%'</SAMP> marker
may be elided if the declaration section is empty. may be elided if the declaration section is empty.
</P>
<P> <P>
Additional fields may optionally follow the leading keyword. Fields Additional fields may optionally follow the leading keyword. Fields
should be separated by commas, and terminate at the end of line. What should be separated by commas, and terminate at the end of line. What
@@ -491,7 +502,7 @@ declaration section. If the <SAMP>`-t'</SAMP> option (or, equivalently, the
these fields are simply ignored. All previous examples except the last these fields are simply ignored. All previous examples except the last
one contain keyword attributes. one contain keyword attributes.
</P>
<H3><A NAME="SEC14" HREF="gperf_toc.html#TOC14">3.1.3 Including Additional C Functions</A></H3> <H3><A NAME="SEC14" HREF="gperf_toc.html#TOC14">3.1.3 Including Additional C Functions</A></H3>
@@ -504,7 +515,7 @@ file, is included verbatim into the generated output file. Naturally,
it is your responsibility to ensure that the code contained in this it is your responsibility to ensure that the code contained in this
section is valid C. section is valid C.
</P>
<H3><A NAME="SEC15" HREF="gperf_toc.html#TOC15">3.1.4 Where to place directives for GNU <CODE>indent</CODE>.</A></H3> <H3><A NAME="SEC15" HREF="gperf_toc.html#TOC15">3.1.4 Where to place directives for GNU <CODE>indent</CODE>.</A></H3>
@@ -517,7 +528,7 @@ interpretation of the input file. Therefore you have to insert some
directives for GNU <CODE>indent</CODE>. More precisely, assuming the most directives for GNU <CODE>indent</CODE>. More precisely, assuming the most
general input file structure general input file structure
</P>
<PRE> <PRE>
declarations part 1 declarations part 1
@@ -535,7 +546,7 @@ functions
you would insert <SAMP>`*INDENT-OFF*'</SAMP> and <SAMP>`*INDENT-ON*'</SAMP> comments you would insert <SAMP>`*INDENT-OFF*'</SAMP> and <SAMP>`*INDENT-ON*'</SAMP> comments
as follows: as follows:
</P>
<PRE> <PRE>
/* *INDENT-OFF* */ /* *INDENT-OFF* */
@@ -557,9 +568,9 @@ functions
<H2><A NAME="SEC16" HREF="gperf_toc.html#TOC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A></H2> <H2><A NAME="SEC16" HREF="gperf_toc.html#TOC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A></H2>
<P> <P>
<A NAME="IDX33"></A> <A NAME="IDX34"></A>
</P>
<P> <P>
Several options control how the generated C code appears on the standard Several options control how the generated C code appears on the standard
output. Two C function are generated. They are called <CODE>hash</CODE> and output. Two C function are generated. They are called <CODE>hash</CODE> and
@@ -568,11 +579,11 @@ option. Both functions require two arguments, a string, <CODE>char *</CODE>
<VAR>str</VAR>, and a length parameter, <CODE>int</CODE> <VAR>len</VAR>. Their default <VAR>str</VAR>, and a length parameter, <CODE>int</CODE> <VAR>len</VAR>. Their default
function prototypes are as follows: function prototypes are as follows:
</P>
<P> <P>
<DL> <DL>
<DT><U>Function:</U> unsigned int <B>hash</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I> <DT><U>Function:</U> unsigned int <B>hash</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I>
<DD><A NAME="IDX34"></A> <DD><A NAME="IDX35"></A>
By default, the generated <CODE>hash</CODE> function returns an integer value By default, the generated <CODE>hash</CODE> function returns an integer value
created by adding <VAR>len</VAR> to several user-specified <VAR>str</VAR> byte created by adding <VAR>len</VAR> to several user-specified <VAR>str</VAR> byte
positions indexed into an <EM>associated values</EM> table stored in a positions indexed into an <EM>associated values</EM> table stored in a
@@ -580,14 +591,14 @@ local static array. The associated values table is constructed
internally by <CODE>gperf</CODE> and later output as a static local C array internally by <CODE>gperf</CODE> and later output as a static local C array
called <SAMP>`hash_table'</SAMP>. The relevant selected positions (i.e. indices called <SAMP>`hash_table'</SAMP>. The relevant selected positions (i.e. indices
into <VAR>str</VAR>) are specified via the <SAMP>`-k'</SAMP> option when running into <VAR>str</VAR>) are specified via the <SAMP>`-k'</SAMP> option when running
<CODE>gperf</CODE>, as detailed in the <EM>Options</EM> section below (see section <A HREF="gperf_6.html#SEC18">4. Invoking <CODE>gperf</CODE></A>). <CODE>gperf</CODE>, as detailed in the <EM>Options</EM> section below (see section <A HREF="gperf_6.html#SEC18">4 Invoking <CODE>gperf</CODE></A>).
</DL> </DL>
</P>
<P> <P>
<DL> <DL>
<DT><U>Function:</U> <B>in_word_set</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I> <DT><U>Function:</U> <B>in_word_set</B> <I>(const char * <VAR>str</VAR>, unsigned int <VAR>len</VAR>)</I>
<DD><A NAME="IDX35"></A> <DD><A NAME="IDX36"></A>
If <VAR>str</VAR> is in the keyword set, returns a pointer to that If <VAR>str</VAR> is in the keyword set, returns a pointer to that
keyword. More exactly, if the option <SAMP>`-t'</SAMP> (or, equivalently, the keyword. More exactly, if the option <SAMP>`-t'</SAMP> (or, equivalently, the
<SAMP>`%struct-type'</SAMP> declaration) was given, it returns <SAMP>`%struct-type'</SAMP> declaration) was given, it returns
@@ -595,7 +606,7 @@ a pointer to the matching keyword's structure. Otherwise it returns
<CODE>NULL</CODE>. <CODE>NULL</CODE>.
</DL> </DL>
</P>
<P> <P>
If the option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP> If the option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP>
declaration) is not used, <VAR>str</VAR> must be a NUL terminated declaration) is not used, <VAR>str</VAR> must be a NUL terminated
@@ -604,12 +615,12 @@ string of exactly length <VAR>len</VAR>. If <SAMP>`-c'</SAMP> (or, equivalently
simply be an array of <VAR>len</VAR> bytes and does not need to be NUL simply be an array of <VAR>len</VAR> bytes and does not need to be NUL
terminated. terminated.
</P>
<P> <P>
The code generated for these two functions is affected by the following The code generated for these two functions is affected by the following
options: options:
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-t'</SAMP> <DT><SAMP>`-t'</SAMP>
@@ -622,7 +633,7 @@ Make use of the user-defined <CODE>struct</CODE>.
<DD> <DD>
<DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP> <DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX36"></A> <A NAME="IDX37"></A>
Generate 1 or more C <CODE>switch</CODE> statement rather than use a large, Generate 1 or more C <CODE>switch</CODE> statement rather than use a large,
(and potentially sparse) static array. Although the exact time and (and potentially sparse) static array. Although the exact time and
space savings of this approach vary according to your C compiler's space savings of this approach vary according to your C compiler's
@@ -640,14 +651,14 @@ with the various input and output options, and timing the resulting C
code, you can determine the best option choices for different keyword code, you can determine the best option choices for different keyword
set characteristics. set characteristics.
</P>
<H2><A NAME="SEC17" HREF="gperf_toc.html#TOC17">3.3 Use of NUL bytes</A></H2> <H2><A NAME="SEC17" HREF="gperf_toc.html#TOC17">3.3 Use of NUL bytes</A></H2>
<P> <P>
<A NAME="IDX37"></A> <A NAME="IDX38"></A>
</P>
<P> <P>
By default, the code generated by <CODE>gperf</CODE> operates on zero By default, the code generated by <CODE>gperf</CODE> operates on zero
terminated strings, the usual representation of strings in C. This means terminated strings, the usual representation of strings in C. This means
@@ -655,7 +666,7 @@ that the keywords in the input file must not contain NUL bytes,
and the <VAR>str</VAR> argument passed to <CODE>hash</CODE> or <CODE>in_word_set</CODE> and the <VAR>str</VAR> argument passed to <CODE>hash</CODE> or <CODE>in_word_set</CODE>
must be NUL terminated and have exactly length <VAR>len</VAR>. must be NUL terminated and have exactly length <VAR>len</VAR>.
</P>
<P> <P>
If option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP> If option <SAMP>`-c'</SAMP> (or, equivalently, the <SAMP>`%compare-strncmp'</SAMP>
declaration) is used, then the <VAR>str</VAR> argument does not need declaration) is used, then the <VAR>str</VAR> argument does not need
@@ -664,7 +675,7 @@ access the first <VAR>len</VAR>, not <VAR>len+1</VAR>, bytes starting at <VAR>st
However, the keywords in the input file still must not contain NUL However, the keywords in the input file still must not contain NUL
bytes. bytes.
</P>
<P> <P>
If option <SAMP>`-l'</SAMP> (or, equivalently, the <SAMP>`%compare-lengths'</SAMP> If option <SAMP>`-l'</SAMP> (or, equivalently, the <SAMP>`%compare-lengths'</SAMP>
declaration) is used, then the hash table performs binary declaration) is used, then the hash table performs binary
@@ -674,7 +685,7 @@ generated by <CODE>gperf</CODE> will treat NUL like any other byte.
Also, in this case the <SAMP>`-c'</SAMP> option (or, equivalently, the Also, in this case the <SAMP>`-c'</SAMP> option (or, equivalently, the
<SAMP>`%compare-strncmp'</SAMP> declaration) is ignored. <SAMP>`%compare-strncmp'</SAMP> declaration) is ignored.
</P>
<P><HR><P> <P><HR><P>
Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_4.html">previous</A>, <A HREF="gperf_6.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>. Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_4.html">previous</A>, <A HREF="gperf_6.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>.
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<HTML> <HTML>
<HEAD> <HEAD>
<!-- Created by texi2html 1.56k from gperf.texi on 12 June 2003 --> <!-- This HTML file has been created by texi2html 1.52
from gperf.texi on 13 January 2006 -->
<TITLE>Perfect Hash Function Generator - 4. Invoking gperf</TITLE> <TITLE>Perfect Hash Function Generator - 4 Invoking gperf</TITLE>
</HEAD> </HEAD>
<BODY> <BODY>
Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_5.html">previous</A>, <A HREF="gperf_7.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>. Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_5.html">previous</A>, <A HREF="gperf_7.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>.
<P><HR><P> <P><HR><P>
<H1><A NAME="SEC18" HREF="gperf_toc.html#TOC18">4. Invoking <CODE>gperf</CODE></A></H1> <H1><A NAME="SEC18" HREF="gperf_toc.html#TOC18">4 Invoking <CODE>gperf</CODE></A></H1>
<P> <P>
There are <EM>many</EM> options to <CODE>gperf</CODE>. They were added to make There are <EM>many</EM> options to <CODE>gperf</CODE>. They were added to make
@@ -17,6 +18,7 @@ the program more convenient for use with real applications. "On-line"
help is readily available via the <SAMP>`--help'</SAMP> option. Here is the help is readily available via the <SAMP>`--help'</SAMP> option. Here is the
complete list of options. complete list of options.
</P>
@@ -33,7 +35,7 @@ Allows you to specify the name of the file to which the output is written to.
The results are written to standard output if no output file is specified The results are written to standard output if no output file is specified
or if it is <SAMP>`-'</SAMP>. or if it is <SAMP>`-'</SAMP>.
</P>
<H2><A NAME="SEC20" HREF="gperf_toc.html#TOC20">4.2 Options that affect Interpretation of the Input File</A></H2> <H2><A NAME="SEC20" HREF="gperf_toc.html#TOC20">4.2 Options that affect Interpretation of the Input File</A></H2>
@@ -42,14 +44,14 @@ or if it is <SAMP>`-'</SAMP>.
These options are also available as declarations in the input file These options are also available as declarations in the input file
(see section <A HREF="gperf_5.html#SEC11">3.1.1.2 Gperf Declarations</A>). (see section <A HREF="gperf_5.html#SEC11">3.1.1.2 Gperf Declarations</A>).
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-e <VAR>keyword-delimiter-list</VAR>'</SAMP> <DT><SAMP>`-e <VAR>keyword-delimiter-list</VAR>'</SAMP>
<DD> <DD>
<DT><SAMP>`--delimiters=<VAR>keyword-delimiter-list</VAR>'</SAMP> <DT><SAMP>`--delimiters=<VAR>keyword-delimiter-list</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX38"></A> <A NAME="IDX39"></A>
Allows you to provide a string containing delimiters used to Allows you to provide a string containing delimiters used to
separate keywords from their attributes. The default is ",". This separate keywords from their attributes. The default is ",". This
option is essential if you want to use keywords that have embedded option is essential if you want to use keywords that have embedded
@@ -88,7 +90,7 @@ the <CODE>gperf</CODE> generated function.
These options are also available as declarations in the input file These options are also available as declarations in the input file
(see section <A HREF="gperf_5.html#SEC11">3.1.1.2 Gperf Declarations</A>). (see section <A HREF="gperf_5.html#SEC11">3.1.1.2 Gperf Declarations</A>).
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-L <VAR>generated-language-name</VAR>'</SAMP> <DT><SAMP>`-L <VAR>generated-language-name</VAR>'</SAMP>
@@ -142,14 +144,14 @@ This option is supported for compatibility with previous releases of
Most of these options are also available as declarations in the input file Most of these options are also available as declarations in the input file
(see section <A HREF="gperf_5.html#SEC11">3.1.1.2 Gperf Declarations</A>). (see section <A HREF="gperf_5.html#SEC11">3.1.1.2 Gperf Declarations</A>).
</P>
<DL COMPACT> <DL COMPACT>
<DT><SAMP>`-K <VAR>slot-name</VAR>'</SAMP> <DT><SAMP>`-K <VAR>slot-name</VAR>'</SAMP>
<DD> <DD>
<DT><SAMP>`--slot-name=<VAR>slot-name</VAR>'</SAMP> <DT><SAMP>`--slot-name=<VAR>slot-name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX39"></A> <A NAME="IDX40"></A>
This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the
<SAMP>`%struct-type'</SAMP> declaration) has been given. <SAMP>`%struct-type'</SAMP> declaration) has been given.
By default, the program assumes the structure component identifier for By default, the program assumes the structure component identifier for
@@ -161,7 +163,7 @@ field in your supplied <CODE>struct</CODE>.
<DD> <DD>
<DT><SAMP>`--initializer-suffix=<VAR>initializers</VAR>'</SAMP> <DT><SAMP>`--initializer-suffix=<VAR>initializers</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX40"></A> <A NAME="IDX41"></A>
This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the This option is only useful when option <SAMP>`-t'</SAMP> (or, equivalently, the
<SAMP>`%struct-type'</SAMP> declaration) has been given. <SAMP>`%struct-type'</SAMP> declaration) has been given.
It permits to specify initializers for the structure members following It permits to specify initializers for the structure members following
@@ -189,7 +191,7 @@ generated hash functions to be used in the same application.
<DD> <DD>
<DT><SAMP>`--class-name=<VAR>class-name</VAR>'</SAMP> <DT><SAMP>`--class-name=<VAR>class-name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX41"></A> <A NAME="IDX42"></A>
This option is only useful when option <SAMP>`-L C++'</SAMP> (or, equivalently, This option is only useful when option <SAMP>`-L C++'</SAMP> (or, equivalently,
the <SAMP>`%language=C++'</SAMP> declaration) has been given. It the <SAMP>`%language=C++'</SAMP> declaration) has been given. It
allows you to specify the name of generated C++ class. Default name is allows you to specify the name of generated C++ class. Default name is
@@ -295,17 +297,25 @@ of one more test-and-branch instruction at run time.
<DD> <DD>
<DT><SAMP>`--word-array-name=<VAR>hash-table-array-name</VAR>'</SAMP> <DT><SAMP>`--word-array-name=<VAR>hash-table-array-name</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX42"></A> <A NAME="IDX43"></A>
Allows you to specify the name for the generated array containing the Allows you to specify the name for the generated array containing the
hash table. Default name is <SAMP>`wordlist'</SAMP>. This option permits the hash table. Default name is <SAMP>`wordlist'</SAMP>. This option permits the
use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP> use of two hash tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given. (or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`--length-table-name=<VAR>length-table-array-name</VAR>'</SAMP>
<DD>
<A NAME="IDX44"></A>
Allows you to specify the name for the generated array containing the
length table. Default name is <SAMP>`lengthtable'</SAMP>. This option permits the
use of two length tables in the same file, even when the option <SAMP>`-G'</SAMP>
(or, equivalently, the <SAMP>`%global-table'</SAMP> declaration) is given.
<DT><SAMP>`-S <VAR>total-switch-statements</VAR>'</SAMP> <DT><SAMP>`-S <VAR>total-switch-statements</VAR>'</SAMP>
<DD> <DD>
<DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP> <DT><SAMP>`--switch=<VAR>total-switch-statements</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX43"></A> <A NAME="IDX45"></A>
Causes the generated C code to use a <CODE>switch</CODE> statement scheme, Causes the generated C code to use a <CODE>switch</CODE> statement scheme,
rather than an array lookup table. This can lead to a reduction in both rather than an array lookup table. This can lead to a reduction in both
time and space requirements for some input files. The argument to this time and space requirements for some input files. The argument to this
@@ -365,7 +375,7 @@ through a search that minimizes the number of byte positions.
<DD> <DD>
<DT><SAMP>`--duplicates'</SAMP> <DT><SAMP>`--duplicates'</SAMP>
<DD> <DD>
<A NAME="IDX44"></A> <A NAME="IDX46"></A>
Handle keywords whose selected byte sets hash to duplicate values. Handle keywords whose selected byte sets hash to duplicate values.
Duplicate hash values can occur if a set of keywords has the same names, but Duplicate hash values can occur if a set of keywords has the same names, but
possesses different attributes, or if the selected byte positions are not well possesses different attributes, or if the selected byte positions are not well
@@ -402,7 +412,7 @@ option is not particularly useful when <SAMP>`-S'</SAMP> (or, equivalently,
<DD> <DD>
<DT><SAMP>`--jump=<VAR>jump-value</VAR>'</SAMP> <DT><SAMP>`--jump=<VAR>jump-value</VAR>'</SAMP>
<DD> <DD>
<A NAME="IDX45"></A> <A NAME="IDX47"></A>
Affects the "jump value", i.e., how far to advance the associated Affects the "jump value", i.e., how far to advance the associated
byte value upon collisions. <VAR>Jump-value</VAR> is rounded up to an byte value upon collisions. <VAR>Jump-value</VAR> is rounded up to an
odd number, the default is 5. If the <VAR>jump-value</VAR> is 0 <CODE>gperf</CODE> odd number, the default is 5. If the <VAR>jump-value</VAR> is 0 <CODE>gperf</CODE>

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<HTML> <HTML>
<HEAD> <HEAD>
<!-- Created by texi2html 1.56k from gperf.texi on 12 June 2003 --> <!-- This HTML file has been created by texi2html 1.52
from gperf.texi on 13 January 2006 -->
<TITLE>Perfect Hash Function Generator - 5. Known Bugs and Limitations with gperf</TITLE> <TITLE>Perfect Hash Function Generator - 5 Known Bugs and Limitations with gperf</TITLE>
</HEAD> </HEAD>
<BODY> <BODY>
Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_6.html">previous</A>, <A HREF="gperf_8.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>. Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_6.html">previous</A>, <A HREF="gperf_8.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>.
<P><HR><P> <P><HR><P>
<H1><A NAME="SEC25" HREF="gperf_toc.html#TOC25">5. Known Bugs and Limitations with <CODE>gperf</CODE></A></H1> <H1><A NAME="SEC25" HREF="gperf_toc.html#TOC25">5 Known Bugs and Limitations with <CODE>gperf</CODE></A></H1>
<P> <P>
The following are some limitations with the current release of The following are some limitations with the current release of
<CODE>gperf</CODE>: <CODE>gperf</CODE>:
</P>
<UL> <UL>
<LI> <LI>

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<HTML> <HTML>
<HEAD> <HEAD>
<!-- Created by texi2html 1.56k from gperf.texi on 12 June 2003 --> <!-- This HTML file has been created by texi2html 1.52
from gperf.texi on 13 January 2006 -->
<TITLE>Perfect Hash Function Generator - 6. Things Still Left to Do</TITLE> <TITLE>Perfect Hash Function Generator - 6 Things Still Left to Do</TITLE>
</HEAD> </HEAD>
<BODY> <BODY>
Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_7.html">previous</A>, <A HREF="gperf_9.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>. Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_7.html">previous</A>, <A HREF="gperf_9.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>.
<P><HR><P> <P><HR><P>
<H1><A NAME="SEC26" HREF="gperf_toc.html#TOC26">6. Things Still Left to Do</A></H1> <H1><A NAME="SEC26" HREF="gperf_toc.html#TOC26">6 Things Still Left to Do</A></H1>
<P> <P>
It should be "relatively" easy to replace the current perfect hash It should be "relatively" easy to replace the current perfect hash
@@ -17,7 +18,7 @@ function algorithm with a more exhaustive approach; the perfect hash
module is essential independent from other program modules. Additional module is essential independent from other program modules. Additional
worthwhile improvements include: worthwhile improvements include:
</P>
<UL> <UL>
<LI> <LI>

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<HTML> <HTML>
<HEAD> <HEAD>
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<TITLE>Perfect Hash Function Generator - 7. Bibliography</TITLE> <TITLE>Perfect Hash Function Generator - 7 Bibliography</TITLE>
</HEAD> </HEAD>
<BODY> <BODY>
Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_8.html">previous</A>, <A HREF="gperf_10.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>. Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_8.html">previous</A>, <A HREF="gperf_10.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>.
<P><HR><P> <P><HR><P>
<H1><A NAME="SEC27" HREF="gperf_toc.html#TOC27">7. Bibliography</A></H1> <H1><A NAME="SEC27" HREF="gperf_toc.html#TOC27">7 Bibliography</A></H1>
<P> <P>
[1] Chang, C.C.: <I>A Scheme for Constructing Ordered Minimal Perfect [1] Chang, C.C.: <I>A Scheme for Constructing Ordered Minimal Perfect
Hashing Functions</I> Information Sciences 39(1986), 187-195. Hashing Functions</I> Information Sciences 39(1986), 187-195.
</P>
<P> <P>
[2] Cichelli, Richard J. <I>Author's Response to "On Cichelli's Minimal Perfect Hash [2] Cichelli, Richard J. <I>Author's Response to "On Cichelli's Minimal Perfect Hash
Functions Method"</I> Communications of the ACM, 23, 12(December 1980), 729. Functions Method"</I> Communications of the ACM, 23, 12(December 1980), 729.
</P>
<P> <P>
[3] Cichelli, Richard J. <I>Minimal Perfect Hash Functions Made Simple</I> [3] Cichelli, Richard J. <I>Minimal Perfect Hash Functions Made Simple</I>
Communications of the ACM, 23, 1(January 1980), 17-19. Communications of the ACM, 23, 1(January 1980), 17-19.
</P>
<P> <P>
[4] Cook, C. R. and Oldehoeft, R.R. <I>A Letter Oriented Minimal [4] Cook, C. R. and Oldehoeft, R.R. <I>A Letter Oriented Minimal
Perfect Hashing Function</I> SIGPLAN Notices, 17, 9(September 1982), 18-27. Perfect Hashing Function</I> SIGPLAN Notices, 17, 9(September 1982), 18-27.
</P>
<P> <P>
[5] Cormack, G. V. and Horspool, R. N. S. and Kaiserwerth, M. [5] Cormack, G. V. and Horspool, R. N. S. and Kaiserwerth, M.
<I>Practical Perfect Hashing</I> Computer Journal, 28, 1(January 1985), 54-58. <I>Practical Perfect Hashing</I> Computer Journal, 28, 1(January 1985), 54-58.
</P>
<P> <P>
[6] Jaeschke, G. <I>Reciprocal Hashing: A Method for Generating Minimal [6] Jaeschke, G. <I>Reciprocal Hashing: A Method for Generating Minimal
Perfect Hashing Functions</I> Communications of the ACM, 24, 12(December Perfect Hashing Functions</I> Communications of the ACM, 24, 12(December
1981), 829-833. 1981), 829-833.
</P>
<P> <P>
[7] Jaeschke, G. and Osterburg, G. <I>On Cichelli's Minimal Perfect [7] Jaeschke, G. and Osterburg, G. <I>On Cichelli's Minimal Perfect
Hash Functions Method</I> Communications of the ACM, 23, 12(December 1980), Hash Functions Method</I> Communications of the ACM, 23, 12(December 1980),
728-729. 728-729.
</P>
<P> <P>
[8] Sager, Thomas J. <I>A Polynomial Time Generator for Minimal Perfect [8] Sager, Thomas J. <I>A Polynomial Time Generator for Minimal Perfect
Hash Functions</I> Communications of the ACM, 28, 5(December 1985), 523-532 Hash Functions</I> Communications of the ACM, 28, 5(December 1985), 523-532
</P>
<P> <P>
[9] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I> [9] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I>
Second USENIX C++ Conference Proceedings, April 1990. Second USENIX C++ Conference Proceedings, April 1990.
</P>
<P> <P>
[10] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I> [10] Schmidt, Douglas C. <I>GPERF: A Perfect Hash Function Generator</I>
C++ Report, SIGS 10 10 (November/December 1998). C++ Report, SIGS 10 10 (November/December 1998).
</P>
<P> <P>
[11] Sebesta, R.W. and Taylor, M.A. <I>Minimal Perfect Hash Functions [11] Sebesta, R.W. and Taylor, M.A. <I>Minimal Perfect Hash Functions
for Reserved Word Lists</I> SIGPLAN Notices, 20, 12(September 1985), 47-53. for Reserved Word Lists</I> SIGPLAN Notices, 20, 12(September 1985), 47-53.
</P>
<P> <P>
[12] Sprugnoli, R. <I>Perfect Hashing Functions: A Single Probe [12] Sprugnoli, R. <I>Perfect Hashing Functions: A Single Probe
Retrieving Method for Static Sets</I> Communications of the ACM, 20 Retrieving Method for Static Sets</I> Communications of the ACM, 20
11(November 1977), 841-850. 11(November 1977), 841-850.
</P>
<P> <P>
[13] Stallman, Richard M. <I>Using and Porting GNU CC</I> Free Software Foundation, [13] Stallman, Richard M. <I>Using and Porting GNU CC</I> Free Software Foundation,
1988. 1988.
</P>
<P> <P>
[14] Stroustrup, Bjarne <I>The C++ Programming Language.</I> Addison-Wesley, 1986. [14] Stroustrup, Bjarne <I>The C++ Programming Language.</I> Addison-Wesley, 1986.
</P>
<P> <P>
[15] Tiemann, Michael D. <I>User's Guide to GNU C++</I> Free Software [15] Tiemann, Michael D. <I>User's Guide to GNU C++</I> Free Software
Foundation, 1989. Foundation, 1989.
</P>
<P><HR><P> <P><HR><P>
Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_8.html">previous</A>, <A HREF="gperf_10.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>. Go to the <A HREF="gperf_1.html">first</A>, <A HREF="gperf_8.html">previous</A>, <A HREF="gperf_10.html">next</A>, <A HREF="gperf_10.html">last</A> section, <A HREF="gperf_toc.html">table of contents</A>.
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<HTML> <HTML>
<HEAD> <HEAD>
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from gperf.texi on 13 January 2006 -->
<TITLE>Perfect Hash Function Generator - Table of Contents</TITLE> <TITLE>Perfect Hash Function Generator - Table of Contents</TITLE>
</HEAD> </HEAD>
<BODY> <BODY>
<H1>User's Guide to <CODE>gperf</CODE> 3.0.1</H1> <H1>User's Guide to <CODE>gperf</CODE> 3.0.2</H1>
<H2>The GNU Perfect Hash Function Generator</H2> <H2>The GNU Perfect Hash Function Generator</H2>
<H2>Edition 3.0.1, 12 June 2003</H2> <H2>Edition 3.0.2, 13 January 2006</H2>
<ADDRESS>Douglas C. Schmidt</ADDRESS> <ADDRESS>Douglas C. Schmidt</ADDRESS>
<ADDRESS>Bruno Haible</ADDRESS> <ADDRESS>Bruno Haible</ADDRESS>
<P> <P>
@@ -19,9 +20,9 @@
<LI><A NAME="TOC3" HREF="gperf_1.html#SEC3">How to Apply These Terms to Your New Programs</A> <LI><A NAME="TOC3" HREF="gperf_1.html#SEC3">How to Apply These Terms to Your New Programs</A>
</UL> </UL>
<LI><A NAME="TOC4" HREF="gperf_2.html#SEC4">Contributors to GNU <CODE>gperf</CODE> Utility</A> <LI><A NAME="TOC4" HREF="gperf_2.html#SEC4">Contributors to GNU <CODE>gperf</CODE> Utility</A>
<LI><A NAME="TOC5" HREF="gperf_3.html#SEC5">1. Introduction</A> <LI><A NAME="TOC5" HREF="gperf_3.html#SEC5">1 Introduction</A>
<LI><A NAME="TOC6" HREF="gperf_4.html#SEC6">2. Static search structures and GNU <CODE>gperf</CODE></A> <LI><A NAME="TOC6" HREF="gperf_4.html#SEC6">2 Static search structures and GNU <CODE>gperf</CODE></A>
<LI><A NAME="TOC7" HREF="gperf_5.html#SEC7">3. High-Level Description of GNU <CODE>gperf</CODE></A> <LI><A NAME="TOC7" HREF="gperf_5.html#SEC7">3 High-Level Description of GNU <CODE>gperf</CODE></A>
<UL> <UL>
<LI><A NAME="TOC8" HREF="gperf_5.html#SEC8">3.1 Input Format to <CODE>gperf</CODE></A> <LI><A NAME="TOC8" HREF="gperf_5.html#SEC8">3.1 Input Format to <CODE>gperf</CODE></A>
<UL> <UL>
@@ -38,7 +39,7 @@
<LI><A NAME="TOC16" HREF="gperf_5.html#SEC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A> <LI><A NAME="TOC16" HREF="gperf_5.html#SEC16">3.2 Output Format for Generated C Code with <CODE>gperf</CODE></A>
<LI><A NAME="TOC17" HREF="gperf_5.html#SEC17">3.3 Use of NUL bytes</A> <LI><A NAME="TOC17" HREF="gperf_5.html#SEC17">3.3 Use of NUL bytes</A>
</UL> </UL>
<LI><A NAME="TOC18" HREF="gperf_6.html#SEC18">4. Invoking <CODE>gperf</CODE></A> <LI><A NAME="TOC18" HREF="gperf_6.html#SEC18">4 Invoking <CODE>gperf</CODE></A>
<UL> <UL>
<LI><A NAME="TOC19" HREF="gperf_6.html#SEC19">4.1 Specifying the Location of the Output File</A> <LI><A NAME="TOC19" HREF="gperf_6.html#SEC19">4.1 Specifying the Location of the Output File</A>
<LI><A NAME="TOC20" HREF="gperf_6.html#SEC20">4.2 Options that affect Interpretation of the Input File</A> <LI><A NAME="TOC20" HREF="gperf_6.html#SEC20">4.2 Options that affect Interpretation of the Input File</A>
@@ -47,13 +48,14 @@
<LI><A NAME="TOC23" HREF="gperf_6.html#SEC23">4.5 Options for changing the Algorithms employed by <CODE>gperf</CODE></A> <LI><A NAME="TOC23" HREF="gperf_6.html#SEC23">4.5 Options for changing the Algorithms employed by <CODE>gperf</CODE></A>
<LI><A NAME="TOC24" HREF="gperf_6.html#SEC24">4.6 Informative Output</A> <LI><A NAME="TOC24" HREF="gperf_6.html#SEC24">4.6 Informative Output</A>
</UL> </UL>
<LI><A NAME="TOC25" HREF="gperf_7.html#SEC25">5. Known Bugs and Limitations with <CODE>gperf</CODE></A> <LI><A NAME="TOC25" HREF="gperf_7.html#SEC25">5 Known Bugs and Limitations with <CODE>gperf</CODE></A>
<LI><A NAME="TOC26" HREF="gperf_8.html#SEC26">6. Things Still Left to Do</A> <LI><A NAME="TOC26" HREF="gperf_8.html#SEC26">6 Things Still Left to Do</A>
<LI><A NAME="TOC27" HREF="gperf_9.html#SEC27">7. Bibliography</A> <LI><A NAME="TOC27" HREF="gperf_9.html#SEC27">7 Bibliography</A>
<LI><A NAME="TOC28" HREF="gperf_10.html#SEC28">Concept Index</A> <LI><A NAME="TOC28" HREF="gperf_10.html#SEC28">Concept Index</A>
</UL> </UL>
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