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Rework positions handling.

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This commit is contained in:
Bruno Haible
2002-12-09 12:35:55 +00:00
parent d776b8df65
commit 5090f380e3
6 changed files with 197 additions and 121 deletions
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52
src/options.h
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@@ -50,57 +50,54 @@ enum Option_Type
/* Randomly initialize the associated values table. */
RANDOM = 1 << 4,
/* Make default char positions be 1,$ (end of keyword). */
DEFAULTCHARS = 1 << 5,
/* Generate switch output to save space. */
SWITCH = 1 << 6,
SWITCH = 1 << 5,
/* Don't include keyword length in hash computations. */
NOLENGTH = 1 << 7,
NOLENGTH = 1 << 6,
/* Generate a length table for string comparison. */
LENTABLE = 1 << 8,
LENTABLE = 1 << 7,
/* Handle duplicate hash values for keywords. */
DUP = 1 << 9,
DUP = 1 << 8,
/* Generate the hash function "fast". */
FAST = 1 << 10,
FAST = 1 << 9,
/* Don't include user-defined type definition in output -- it's already
defined elsewhere. */
NOTYPE = 1 << 11,
NOTYPE = 1 << 10,
/* Generate strncmp rather than strcmp. */
COMP = 1 << 12,
COMP = 1 << 11,
/* Make the keyword table a global variable. */
GLOBAL = 1 << 13,
GLOBAL = 1 << 12,
/* Make the generated tables readonly (const). */
CONST = 1 << 14,
CONST = 1 << 13,
/* Generate K&R C code: no prototypes, no const. */
KRC = 1 << 15,
KRC = 1 << 14,
/* Generate C code: no prototypes, but const (user can #define it away). */
C = 1 << 16,
C = 1 << 15,
/* Generate ISO/ANSI C code: prototypes and const, but no class. */
ANSIC = 1 << 17,
ANSIC = 1 << 16,
/* Generate C++ code: prototypes, const, class, inline, enum. */
CPLUSPLUS = 1 << 18,
CPLUSPLUS = 1 << 17,
/* Use enum for constants. */
ENUM = 1 << 19,
ENUM = 1 << 18,
/* Generate #include statements. */
INCLUDE = 1 << 20,
INCLUDE = 1 << 21,
/* Assume 7-bit, not 8-bit, characters. */
SEVENBIT = 1 << 21
SEVENBIT = 1 << 22
};
/* This class denotes a set of key positions. */
@@ -112,8 +109,9 @@ public:
/* Denotes the last char of a keyword, depending on the keyword's length. */
static const int LASTCHAR = 0;
/* Maximum size of the set. */
static const int MAX_KEY_POS = 127;
/* Maximum key position specifiable by the user.
Note that this must fit into the element type of _positions[], below. */
static const int MAX_KEY_POS = 255;
/* Constructors. */
Positions ();
@@ -133,11 +131,13 @@ public:
bool sort ();
private:
/* Number of positions, excluding the terminating PositionIterator::EOS. */
/* Number of positions. */
unsigned int _size;
/* Array of positions. 1 for the first char, 2 for the second char etc.,
LASTCHAR for the last char. PositionIterator::EOS past the end. */
unsigned char _positions[MAX_KEY_POS];
LASTCHAR for the last char.
Note that since duplicates are eliminated, the maximum possible size
is MAX_KEY_POS + 1. */
unsigned char _positions[MAX_KEY_POS + 1];
};
/* This class denotes an iterator through a set of key positions. */
@@ -149,14 +149,14 @@ public:
PositionIterator (Positions const& positions);
/* End of iteration marker. */
static const int EOS = Positions::MAX_KEY_POS;
static const int EOS = -1;
/* Retrieves the next position, or EOS past the end. */
int next ();
private:
const Positions& _set;
int _index;
unsigned int _index;
};
/* Class manager for gperf program Options. */