src/struniq.h

   1 /* Keeping a unique copy of strings.
   2    Copyright (C) 2002 Free Software Foundation, Inc.
   3
   4    This file is part of Bison, the GNU Compiler Compiler.
   5
   6    Bison is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    Bison is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with Bison; see the file COPYING.  If not, write to
  18    the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef STRUNIQ_H_
  22 # define STRUNIQ_H_
  23
  24 /*------------------------------------------------------.
  25 | struniq_t -- pointers to unique copies of C strings.  |
  26 `------------------------------------------------------*/
  27
  28 typedef const char *struniq_t;
  29
  30 /* Return the struniq for S.  */
  31 const struniq_t struniq_new (const char *s);
  32
  33 /* Two struniq have the same value iff they are the same.  */
  34 #define STRUNIQ_EQ(S1, S2) ((S1) == (S2))
  35
  36 /*--------------------------------------.
  37 | Initializing, destroying, debugging.  |
  38 `--------------------------------------*/
  39
  40 /* Create the string table.  */
  41 void struniqs_new (void);
  42
  43 /* Die if S is not a struniq.  */
  44 #define struniq_assert(S) assert (struniq_assert_p (S));
  45 bool struniq_assert_p (const char *s);
  46
  47 /* Free all the memory allocated for symbols.  */
  48 void struniqs_free (void);
  49
  50 /* Report them all.  */
  51 void struniqs_print (void);
  52
  53 #endif /* !STRUNIQ_H_ */