locale/programs/linereader.h

   1 /* Copyright (C) 1996-2001, 2002, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper, <drepper@gnu.org>.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #ifndef _LINEREADER_H
  21 #define _LINEREADER_H 1
  22
  23 #include <ctype.h>
  24 #include <libintl.h>
  25 #include <stdint.h>
  26 #include <stdio.h>
  27
  28 #include "charmap.h"
  29 #include "error.h"
  30 #include "locfile-token.h"
  31 #include "repertoire.h"
  32
  33
  34 typedef const struct keyword_t *(*kw_hash_fct_t) (const char *, unsigned int);
  35 struct charset_t;
  36 struct localedef_t;
  37
  38 struct token
  39 {
  40   enum token_t tok;
  41   union
  42   {
  43     struct
  44     {
  45       char *startmb;
  46       size_t lenmb;
  47       uint32_t *startwc;
  48       size_t lenwc;
  49     } str;
  50     unsigned long int num;
  51     struct
  52     {
  53       /* This element is sized on the safe expectation that no single
  54          character in any character set uses more then 16 bytes.  */
  55       unsigned char bytes[16];
  56       int nbytes;
  57     } charcode;
  58     uint32_t ucs4;
  59   } val;
  60 };
  61
  62
  63 struct linereader
  64 {
  65   FILE *fp;
  66   const char *fname;
  67   char *buf;
  68   size_t bufsize;
  69   size_t bufact;
  70   size_t lineno;
  71
  72   size_t idx;
  73
  74   char comment_char;
  75   char escape_char;
  76
  77   struct token token;
  78
  79   int translate_strings;
  80   int return_widestr;
  81
  82   kw_hash_fct_t hash_fct;
  83 };
  84
  85
  86 /* Functions defined in linereader.c.  */
  87 extern struct linereader *lr_open (const char *fname, kw_hash_fct_t hf);
  88 extern struct linereader *lr_create (FILE *fp, const char *fname,
  89                                      kw_hash_fct_t hf);
  90 extern int lr_eof (struct linereader *lr);
  91 extern void lr_close (struct linereader *lr);
  92 extern int lr_next (struct linereader *lr);
  93 extern struct token *lr_token (struct linereader *lr,
  94                                const struct charmap_t *charmap,
  95                                struct localedef_t *locale,
  96                                const struct repertoire_t *repertoire,
  97                                int verbose);
  98 extern void lr_ignore_rest (struct linereader *lr, int verbose);
  99
 100
 101 #define lr_error(lr, fmt, args...) \
 102   WITH_CUR_LOCALE (error_at_line (0, 0, lr->fname, lr->lineno, fmt, ## args))
 103
 104
 105
 106 static inline int
 107 __attribute ((always_inline))
 108 lr_getc (struct linereader *lr)
 109 {
 110   if (lr->idx == lr->bufact)
 111     {
 112       if (lr->bufact != 0)
 113         if (lr_next (lr) < 0)
 114           return EOF;
 115
 116       if (lr->bufact == 0)
 117         return EOF;
 118     }
 119
 120   return lr->buf[lr->idx] == '\32' ? EOF : lr->buf[lr->idx++];
 121 }
 122
 123
 124 static inline int
 125 __attribute ((always_inline))
 126 lr_ungetc (struct linereader *lr, int ch)
 127 {
 128   if (lr->idx == 0)
 129     return -1;
 130
 131   if (ch != EOF)
 132     lr->buf[--lr->idx] = ch;
 133   return 0;
 134 }
 135
 136
 137 static inline int
 138 lr_ungetn (struct linereader *lr, size_t n)
 139 {
 140   if (lr->idx < n)
 141     return -1;
 142
 143   lr->idx -= n;
 144   return 0;
 145 }
 146
 147
 148 #endif /* linereader.h */