nsz Git - cparser/blob - token.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program 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
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #include <config.h>
  21
  22 #include "token_t.h"
  23 #include "symbol_t.h"
  24
  25 #include <assert.h>
  26 #include <stdio.h>
  27
  28 #include "symbol.h"
  29 #include "lang_features.h"
  30 #include "adt/array.h"
  31
  32 static symbol_t *token_symbols[T_LAST_TOKEN];
  33 static symbol_t *pp_token_symbols[TP_LAST_TOKEN];
  34
  35 const source_position_t builtin_source_position = { "<built-in>", 0 };
  36
  37 void init_tokens(void)
  38 {
  39         symbol_t *symbol;
  40         int       last_id = -2;
  41
  42         memset(token_symbols, 0, T_LAST_TOKEN * sizeof(token_symbols[0]));
  43         memset(pp_token_symbols, 0, TP_LAST_TOKEN * sizeof(pp_token_symbols[0]));
  44
  45 #define T(mode,x,str,val)                                          \
  46         if (T_##x > 255) {                                             \
  47                 assert(T_##x >= last_id);                                  \
  48                 last_id = T_##x;                                           \
  49         }                                                              \
  50         if (c_mode & (mode)) {                                         \
  51                 assert(T_##x >= 0 && T_##x < T_LAST_TOKEN);                \
  52                 symbol               = symbol_table_insert(str);           \
  53                 symbol->ID           = T_##x;                              \
  54                 if (token_symbols[T_##x] == NULL)                          \
  55                         token_symbols[T_##x] = symbol;                         \
  56         }
  57
  58 #define TS(x,str,val)                                              \
  59         assert(T_##x >= 0 && T_##x < T_LAST_TOKEN);                    \
  60         symbol               = symbol_table_insert(str);               \
  61         if (token_symbols[T_##x] == NULL)                              \
  62                 token_symbols[T_##x] = symbol;                             \
  63
  64 #include "tokens.inc"
  65
  66 #undef TS
  67 #undef T
  68
  69 #define T(mode,x,str,val)                                          \
  70         if (c_mode & (mode)) {                                         \
  71                 assert(TP_##x >= 0 && TP_##x < TP_LAST_TOKEN);             \
  72                 symbol                   = symbol_table_insert(str);       \
  73                 symbol->pp_ID            = TP_##x;                         \
  74                 if (pp_token_symbols[TP_##x] == NULL)                      \
  75                         pp_token_symbols[TP_##x] = symbol;                     \
  76         }
  77
  78 #define TS(x,str,val)                                              \
  79         assert(TP_##x >= 0 && TP_##x < T_LAST_TOKEN);                  \
  80         symbol                   = symbol_table_insert(str);           \
  81         if (pp_token_symbols[TP_##x] == NULL)                          \
  82                 pp_token_symbols[TP_##x] = symbol;
  83
  84 #include "tokens_preprocessor.inc"
  85
  86 #undef T
  87 }
  88
  89 void exit_tokens(void)
  90 {
  91 }
  92
  93 void print_token_type(FILE *f, token_type_t token_type)
  94 {
  95         if(token_type == T_EOF) {
  96                 fputs("end of file", f);
  97                 return;
  98         }
  99         if(token_type == T_ERROR) {
 100                 fputs("error", f);
 101                 return;
 102         }
 103
 104         int token_symbols_len = T_LAST_TOKEN;
 105         if(token_type < 0 || token_type >= token_symbols_len) {
 106                 fputs("invalid token", f);
 107                 return;
 108         }
 109
 110         const symbol_t *symbol = token_symbols[token_type];
 111         if(symbol != NULL) {
 112                 fputs(symbol->string, f);
 113         } else {
 114                 if(token_type >= 0 && token_type < 256) {
 115                         fputc(token_type, f);
 116                         return;
 117                 }
 118                 fputs("unknown token", f);
 119         }
 120 }
 121
 122 symbol_t *get_token_symbol(const token_t *token)
 123 {
 124         return token_symbols[token->type];
 125 }
 126
 127 static void print_stringrep(const string_t *string, FILE *f)
 128 {
 129         for (size_t i = 0; i < string->size; ++i) {
 130                 fputc(string->begin[i], f);
 131         }
 132 }
 133
 134 void print_token(FILE *f, const token_t *token)
 135 {
 136         switch(token->type) {
 137         case T_IDENTIFIER:
 138                 fprintf(f, "identifier '%s'", token->symbol->string);
 139                 break;
 140         case T_INTEGER:
 141         case T_INTEGER_OCTAL:
 142         case T_INTEGER_HEXADECIMAL:
 143         case T_FLOATINGPOINT:
 144         case T_FLOATINGPOINT_HEXADECIMAL:
 145                 print_token_type(f, (token_type_t)token->type);
 146                 fputs(" '", f);
 147                 print_stringrep(&token->literal, f);
 148                 if (token->symbol != NULL)
 149                         fputs(token->symbol->string, f);
 150                 fputc('\'', f);
 151                 break;
 152         case T_WIDE_STRING_LITERAL:
 153         case T_STRING_LITERAL:
 154                 print_token_type(f, (token_type_t)token->type);
 155                 fprintf(f, " \"%s\"", token->literal.begin);
 156                 break;
 157         case T_CHARACTER_CONSTANT:
 158         case T_WIDE_CHARACTER_CONSTANT:
 159                 print_token_type(f, (token_type_t)token->type);
 160                 fputs(" \'", f);
 161                 print_stringrep(&token->literal, f);
 162                 fputs("'", f);
 163                 break;
 164         default:
 165                 fputc('\'', f);
 166                 print_token_type(f, (token_type_t)token->type);
 167                 fputc('\'', f);
 168                 break;
 169         }
 170 }
 171
 172 void print_pp_token_type(FILE *f, int token_type)
 173 {
 174         if (token_type == TP_EOF) {
 175                 fputs("end of file", f);
 176                 return;
 177         }
 178         if (token_type == TP_ERROR) {
 179                 fputs("error", f);
 180                 return;
 181         }
 182
 183         int token_symbols_len = TP_LAST_TOKEN;
 184         if (token_type < 0 || token_type >= token_symbols_len) {
 185                 fputs("invalid token", f);
 186                 return;
 187         }
 188
 189         const symbol_t *symbol = pp_token_symbols[token_type];
 190         if (symbol != NULL) {
 191                 fputs(symbol->string, f);
 192         } else {
 193                 if(token_type >= 0 && token_type < 256) {
 194                         fputc(token_type, f);
 195                         return;
 196                 }
 197                 fputs("unknown token", f);
 198         }
 199 }
 200
 201 void print_pp_token(FILE *f, const token_t *token)
 202 {
 203         switch((preprocessor_token_type_t) token->type) {
 204         case TP_IDENTIFIER:
 205                 fprintf(f, "identifier '%s'", token->symbol->string);
 206                 break;
 207         case TP_NUMBER:
 208                 fprintf(f, "number '%s'", token->literal.begin);
 209                 break;
 210         case TP_STRING_LITERAL:
 211                 fprintf(f, "string \"%s\"", token->literal.begin);
 212                 break;
 213         default:
 214                 print_pp_token_type(f, (preprocessor_token_type_t) token->type);
 215                 break;
 216         }
 217 }