Add option "-F", initializer suffix, to avoid warnings in gcc.

ChangeLog

@@ -1,5 +1,21 @@
 2000-08-19  Bruno Haible  <bruno@linuix.math.u-bordeaux.fr>
 
+        Make the structure initializers customizable. Based on a patch by
+        Kaveh R. Ghazi <ghazi@caip.rutgers.edu>.
+        * src/options.h (Options::get_initializer_suffix,
+          Options::initializer_suffix): New declarations.
+        * src/options.icc (Options::get_initializer_suffix): New function.
+        * src/options.cc (DEFAULT_INITIALIZER_SUFFIX): New constant.
+          (Options::initializer_suffix): New variable.
+          (Options::long_usage): Document option "-F".
+          (Options constructor): Initialize initializer_suffix.
+          (Options destructor): Dump initializer_suffix.
+          (long_options): Add option "-F".
+          (Options::operator()): Accept option "-F". Sets initializer_suffix.
+        * src/key-list.cc (output_keyword_blank_entries): Output
+          initializer_suffix.
+        * doc/gperf.texi: Document option "-F".
+
         * COPYING: Replace with GPL version 2 (with new FSF address and Y2K safe
           year format).
 

doc/gperf.texi

@@ -517,7 +517,7 @@ the literal tab character.
 
 @item -t
 Allows you to include a @code{struct} type declaration for generated
-code.  Any text before a pair of consecutive %% is consider part of the
+code.  Any text before a pair of consecutive %% is considered part of the
 type declaration.  Key words and additional fields may follow this, one
 group of fields per line.  A set of examples for generating perfect hash
 tables and functions for Ada, C, and G++, Pascal, and Modula 2 and 3
@@ -578,6 +578,13 @@ the keyword is @samp{name}.  This option allows an arbitrary choice of
 identifier for this component, although it still must occur as the first
 field in your supplied @code{struct}.
 
+@item -F @var{initializers}
+This option is only useful when option @samp{-t} has been given.
+It permits to specify initializers for the structure members following
+@var{key name} in empty hash table entries.  The list of initializers
+should start with a comma.  By default, the emitted code will
+zero-initialize structure members following @var{key name}.
+
 @item -H @var{hash function name}
 Allows you to specify the name for the generated hash function.  Default
 name is @samp{hash}.  This option permits the use of two hash tables in the

src/key-list.cc

@@ -1,5 +1,5 @@
 /* Routines for building, ordering, and printing the keyword list.
-   Copyright (C) 1989-1998 Free Software Foundation, Inc.
+   Copyright (C) 1989-1998, 2000 Free Software Foundation, Inc.
    written by Douglas C. Schmidt (schmidt@ics.uci.edu)
 
 This file is part of GNU GPERF.
@@ -1053,7 +1053,17 @@ output_keyword_entry (List_Node *temp, const char *indent)
 static void
 output_keyword_blank_entries (int count, const char *indent)
 {
-  const int columns = 9;
+  int columns;
+  if (option[TYPE])
+    {
+      columns = 58 / (6 + strlen (option.get_initializer_suffix()));
+      if (columns == 0)
+        columns = 1;
+    }
+  else
+    {
+      columns = 9;
+    }
   int column = 0;
   for (int i = 0; i < count; i++)
     {
@@ -1069,7 +1079,7 @@ output_keyword_blank_entries (int count, const char *indent)
             printf (", ");
         }
       if (option[TYPE])
-        printf ("{\"\"}");
+        printf ("{\"\"%s}", option.get_initializer_suffix());
       else
         printf ("\"\"");
       column++;

src/options.cc

@@ -1,5 +1,5 @@
 /* Handles parsing the Options provided to the user.
-   Copyright (C) 1989-1998 Free Software Foundation, Inc.
+   Copyright (C) 1989-1998, 2000 Free Software Foundation, Inc.
    written by Douglas C. Schmidt (schmidt@ics.uci.edu)
 
 This file is part of GNU GPERF.
@@ -43,6 +43,9 @@ static const char *const DEFAULT_NAME = "in_word_set";
 /* Default name for the key component. */
 static const char *const DEFAULT_KEY = "name";
 
+/* Default struct initializer suffix. */
+static const char *const DEFAULT_INITIALIZER_SUFFIX = "";
+
 /* Default name for the generated class. */
 static const char *const DEFAULT_CLASS_NAME = "Perfect_Hash";
 
@@ -67,6 +70,7 @@ int Options::iterations;
 char **Options::argument_vector;
 const char *Options::function_name;
 const char *Options::key_name;
+const char *Options::initializer_suffix;
 const char *Options::class_name;
 const char *Options::hash_name;
 const char *Options::wordlist_name;
@@ -116,6 +120,9 @@ Options::long_usage (FILE * strm)
            "Details in the output code:\n"
            "  -K, --slot-name=NAME   Select name of the keyword component in the keyword\n"
            "                         structure.\n"
+           "  -F, --initializer-suffix=INITIALIZERS\n"
+           "                         Initializers for additional components in the keyword\n"
+           "                         structure.\n"
            "  -H, --hash-fn-name=NAME\n"
            "                         Specify name of generated hash function. Default is\n"
            "                         `hash'.\n"
@@ -266,6 +273,7 @@ Options::Options (void)
   option_word         = DEFAULTCHARS | C;
   function_name       = DEFAULT_NAME;
   key_name            = DEFAULT_KEY;
+  initializer_suffix  = DEFAULT_INITIALIZER_SUFFIX;
   hash_name           = DEFAULT_HASH_NAME;
   wordlist_name       = DEFAULT_WORDLIST_NAME;
   class_name          = DEFAULT_CLASS_NAME;
@@ -309,6 +317,7 @@ Options::~Options (void)
                "\nhash function name = %s"
                "\nword list name = %s"
                "\nkey name = %s"
+               "\ninitializer suffix = %s"
                "\njump value = %d"
                "\nmax associated value = %d"
                "\ninitial associated value = %d"
@@ -337,7 +346,8 @@ Options::~Options (void)
                option_word & SEVENBIT ? "enabled" : "disabled",
                iterations,
                function_name, hash_name, wordlist_name, key_name,
-               jump, size - 1, initial_asso_value, delimiters, total_switches);
+               initializer_suffix, jump, size - 1, initial_asso_value,
+               delimiters, total_switches);
       if (option_word & ALLCHARS)
         fprintf (stderr, "all characters are used in the hash function\n");
 
@@ -363,6 +373,7 @@ static const struct option long_options[] =
   { "struct-type", no_argument, 0, 't' },
   { "language", required_argument, 0, 'L' },
   { "slot-name", required_argument, 0, 'K' },
+  { "initializer-suffix", required_argument, 0, 'F' },
   { "hash-fn-name", required_argument, 0, 'H' },
   { "lookup-fn-name", required_argument, 0, 'N' },
   { "class-name", required_argument, 0, 'Z' },
@@ -403,7 +414,7 @@ Options::operator() (int argc, char *argv[])
 
   while ((option_char =
             getopt_long (argument_count, argument_vector,
-                         "adcCDe:Ef:gGhH:i:Ij:k:K:lL:nN:oprs:S:tTvW:Z:7",
+                         "adcCDe:Ef:F:gGhH:i:Ij:k:K:lL:nN:oprs:S:tTvW:Z:7",
                          long_options, (int *)0))
          != -1)
     {
@@ -453,11 +464,16 @@ Options::operator() (int argc, char *argv[])
               }
             break;
           }
+        case 'F':
+          {
+            initializer_suffix = /*getopt*/optarg;
+            break;
+          }
         case 'g':               /* Use the ``inline'' keyword for generated sub-routines, ifdef __GNUC__. */
           break;                /* This is now the default. */
         case 'G':               /* Make the keyword table a global variable. */
           {
-                                                option_word |= GLOBAL;
+            option_word |= GLOBAL;
             break;
           }
         case 'h':               /* Displays a list of helpful Options to the user. */

src/options.h

@@ -2,7 +2,7 @@
 
 /* Handles parsing the Options provided to the user.
 
-   Copyright (C) 1989-1998 Free Software Foundation, Inc.
+   Copyright (C) 1989-1998, 2000 Free Software Foundation, Inc.
    written by Douglas C. Schmidt (schmidt@ics.uci.edu)
 
 This file is part of GNU GPERF.
@@ -98,6 +98,7 @@ public:
   static int          get_total_switches (void);
   static const char  *get_function_name (void);
   static const char  *get_key_name (void);
+  static const char  *get_initializer_suffix (void);
   static const char  *get_class_name (void);
   static const char  *get_hash_name (void);
   static const char  *get_wordlist_name (void);
@@ -116,6 +117,7 @@ private:
   static char       **argument_vector;                    /* Stores a pointer to command-line vector. */
   static const char  *function_name;                      /* Names used for generated lookup function. */
   static const char  *key_name;                           /* Name used for keyword key. */
+  static const char  *initializer_suffix;                 /* Suffix for empty struct initializers. */
   static const char  *class_name;                         /* Name used for generated C++ class. */
   static const char  *hash_name;                          /* Name used for generated hash function. */
   static const char  *wordlist_name;                      /* Name used for hash table array. */

src/options.icc

@@ -1,6 +1,6 @@
 /* Inline Functions for options.{h,cc}.
 
-   Copyright (C) 1989-1998 Free Software Foundation, Inc.
+   Copyright (C) 1989-1998, 2000 Free Software Foundation, Inc.
    written by Douglas C. Schmidt (schmidt@ics.uci.edu)
 
 This file is part of GNU GPERF.
@@ -118,6 +118,14 @@ Options::get_key_name (void)
   return key_name;
 }
 
+/* Returns the struct initializer suffix. */
+INLINE const char *
+Options::get_initializer_suffix (void)
+{
+  T (Trace t ("Options::get_initializer_suffix");)
+  return initializer_suffix;
+}
+
 /* Returns the hash function name. */
 INLINE const char *
 Options::get_hash_name (void)