libs/wpp/wpp.c

   1 /*
   2  * Exported functions of the Wine preprocessor
   3  *
   4  * Copyright 1998 Bertho A. Stultiens
   5  * Copyright 2002 Alexandre Julliard
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23 #include "wine/port.h"
  24
  25 #include <time.h>
  26 #include <stdlib.h>
  27
  28 #include "wpp_private.h"
  29 #include "wine/wpp.h"
  30
  31 int ppy_debug, pp_flex_debug;
  32
  33 struct define
  34 {
  35     struct define *next;
  36     char          *name;
  37     char          *value;
  38 };
  39
  40 static struct define *cmdline_defines;
  41
  42 static void add_cmdline_defines(void)
  43 {
  44     struct define *def;
  45
  46     for (def = cmdline_defines; def; def = def->next)
  47     {
  48         if (def->value) pp_add_define( def->name, def->value );
  49     }
  50 }
  51
  52 static void add_special_defines(void)
  53 {
  54     time_t now = time(NULL);
  55     pp_entry_t *ppp;
  56     char buf[32];
  57
  58     strftime(buf, sizeof(buf), "\"%b %d %Y\"", localtime(&now));
  59     pp_add_define( "__DATE__", buf );
  60
  61     strftime(buf, sizeof(buf), "\"%H:%M:%S\"", localtime(&now));
  62     pp_add_define( "__TIME__", buf );
  63
  64     ppp = pp_add_define( "__FILE__", "" );
  65     if(ppp)
  66         ppp->type = def_special;
  67
  68     ppp = pp_add_define( "__LINE__", "" );
  69     if(ppp)
  70         ppp->type = def_special;
  71 }
  72
  73
  74 /* add a define to the preprocessor list */
  75 int wpp_add_define( const char *name, const char *value )
  76 {
  77     struct define *def;
  78
  79     if (!value) value = "";
  80
  81     for (def = cmdline_defines; def; def = def->next)
  82     {
  83         if (!strcmp( def->name, name ))
  84         {
  85             char *new_value = pp_xstrdup(value);
  86             if(!new_value)
  87                 return 1;
  88             free( def->value );
  89             def->value = new_value;
  90
  91             return 0;
  92         }
  93     }
  94
  95     def = pp_xmalloc( sizeof(*def) );
  96     if(!def)
  97         return 1;
  98     def->next  = cmdline_defines;
  99     def->name  = pp_xstrdup(name);
 100     if(!def->name)
 101     {
 102         free(def);
 103         return 1;
 104     }
 105     def->value = pp_xstrdup(value);
 106     if(!def->value)
 107     {
 108         free(def->name);
 109         free(def);
 110         return 1;
 111     }
 112     cmdline_defines = def;
 113     return 0;
 114 }
 115
 116
 117 /* undefine a previously added definition */
 118 void wpp_del_define( const char *name )
 119 {
 120     struct define *def;
 121
 122     for (def = cmdline_defines; def; def = def->next)
 123     {
 124         if (!strcmp( def->name, name ))
 125         {
 126             free( def->value );
 127             def->value = NULL;
 128             return;
 129         }
 130     }
 131 }
 132
 133
 134 /* add a command-line define of the form NAME=VALUE */
 135 int wpp_add_cmdline_define( const char *value )
 136 {
 137     char *p;
 138     char *str = pp_xstrdup(value);
 139     if(!str)
 140         return 1;
 141     p = strchr( str, '=' );
 142     if (p) *p++ = 0;
 143     wpp_add_define( str, p );
 144     free( str );
 145     return 0;
 146 }
 147
 148
 149 /* set the various debug flags */
 150 void wpp_set_debug( int lex_debug, int parser_debug, int msg_debug )
 151 {
 152     pp_flex_debug   = lex_debug;
 153     ppy_debug       = parser_debug;
 154     pp_status.debug = msg_debug;
 155 }
 156
 157
 158 /* set the pedantic mode */
 159 void wpp_set_pedantic( int on )
 160 {
 161     pp_status.pedantic = on;
 162 }
 163
 164
 165 /* the main preprocessor parsing loop */
 166 int wpp_parse( const char *input, FILE *output )
 167 {
 168     int ret;
 169
 170     pp_status.input = NULL;
 171     pp_status.line_number = 1;
 172     pp_status.char_number = 1;
 173     pp_status.state = 0;
 174
 175     ret = pp_push_define_state();
 176     if(ret)
 177         return ret;
 178     add_cmdline_defines();
 179     add_special_defines();
 180
 181     if (!input) pp_status.file = stdin;
 182     else if (!(pp_status.file = wpp_callbacks->open(input, 1)))
 183     {
 184         ppy_error("Could not open %s\n", input);
 185         pp_pop_define_state();
 186         return 2;
 187     }
 188
 189     pp_status.input = input;
 190
 191     ppy_out = output;
 192     pp_writestring("# 1 \"%s\" 1\n", input ? input : "");
 193
 194     ret = ppy_parse();
 195     /* If there were errors during processing, return an error code */
 196     if (!ret && pp_status.state) ret = pp_status.state;
 197
 198     if (input) wpp_callbacks->close(pp_status.file);
 199     /* Clean if_stack, it could remain dirty on errors */
 200     while (pp_get_if_depth()) pp_pop_if();
 201     pp_pop_define_state();
 202     return ret;
 203 }
 204
 205
 206 void wpp_set_callbacks( const struct wpp_callbacks *callbacks )
 207 {
 208     wpp_callbacks = callbacks;
 209 }