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 list    entry;
  36     char          *name;
  37     char          *value;
  38 };
  39
  40 static struct list cmdline_defines = LIST_INIT( cmdline_defines );
  41
  42 static void add_cmdline_defines(void)
  43 {
  44     struct define *def;
  45
  46     LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
  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     ppp->type = def_special;
  66
  67     ppp = pp_add_define( "__LINE__", "" );
  68     ppp->type = def_special;
  69 }
  70
  71 /* add a define to the preprocessor list */
  72 static void wpp_add_define( const char *name, const char *value )
  73 {
  74     struct define *def;
  75
  76     if (!value) value = "";
  77
  78     LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
  79     {
  80         if (!strcmp( def->name, name ))
  81         {
  82             free( def->value );
  83             def->value = pp_xstrdup(value);
  84             return;
  85         }
  86     }
  87
  88     def = pp_xmalloc( sizeof(*def) );
  89     def->name  = pp_xstrdup(name);
  90     def->value = pp_xstrdup(value);
  91     list_add_head( &cmdline_defines, &def->entry );
  92 }
  93
  94
  95 /* undefine a previously added definition */
  96 void wpp_del_define( const char *name )
  97 {
  98     struct define *def;
  99
 100     LIST_FOR_EACH_ENTRY( def, &cmdline_defines, struct define, entry )
 101     {
 102         if (!strcmp( def->name, name ))
 103         {
 104             free( def->value );
 105             def->value = NULL;
 106             return;
 107         }
 108     }
 109 }
 110
 111
 112 /* add a command-line define of the form NAME=VALUE */
 113 void wpp_add_cmdline_define( const char *value )
 114 {
 115     char *p;
 116     char *str = pp_xstrdup(value);
 117
 118     p = strchr( str, '=' );
 119     if (p) *p++ = 0;
 120     wpp_add_define( str, p );
 121     free( str );
 122 }
 123
 124
 125 /* set the various debug flags */
 126 void wpp_set_debug( int lex_debug, int parser_debug, int msg_debug )
 127 {
 128     pp_flex_debug   = lex_debug;
 129     ppy_debug       = parser_debug;
 130     pp_status.debug = msg_debug;
 131 }
 132
 133
 134 /* set the pedantic mode */
 135 void wpp_set_pedantic( int on )
 136 {
 137     pp_status.pedantic = on;
 138 }
 139
 140
 141 /* the main preprocessor parsing loop */
 142 int wpp_parse( const char *input, FILE *output )
 143 {
 144     int ret;
 145
 146     pp_status.input = NULL;
 147     pp_status.line_number = 1;
 148     pp_status.char_number = 1;
 149
 150     pp_init_define_state();
 151     add_cmdline_defines();
 152     add_special_defines();
 153
 154     if (!input) pp_status.file = stdin;
 155     else if (!(pp_status.file = fopen(input, "rt")))
 156         ppy_error("Could not open %s\n", input);
 157
 158     pp_status.input = input ? pp_xstrdup(input) : NULL;
 159
 160     ppy_out = output;
 161     pp_writestring("# 1 \"%s\" 1\n", input ? input : "");
 162
 163     ret = ppy_parse();
 164
 165     if (input)
 166     {
 167         fclose(pp_status.file);
 168         free(pp_status.input);
 169     }
 170     /* Clean if_stack, it could remain dirty on errors */
 171     while (pp_get_if_depth()) pp_pop_if();
 172     pp_free_define_state();
 173     return ret;
 174 }