nsz Git - cparser/blob - diagnostic.c

   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 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 <stdarg.h>
  21 #include <stdio.h>
  22
  23 #include "diagnostic.h"
  24 #include "adt/error.h"
  25 #include "symbol_t.h"
  26 #include "token_t.h"
  27 #include "ast.h"
  28 #include "type.h"
  29 #include "warning.h"
  30
  31 /** Number of occurred diagnostics. */
  32 unsigned diagnostic_count = 0;
  33 /** Number of occurred errors. */
  34 unsigned error_count      = 0;
  35 /** Number of occurred warnings. */
  36 unsigned warning_count    = 0;
  37
  38 static const source_position_t *curr_pos = NULL;
  39
  40 /**
  41  * prints an additional source position
  42  */
  43 static void print_source_position(FILE *out, const source_position_t *pos) {
  44         fprintf(out, "at line %u", pos->linenr);
  45         if (curr_pos == NULL || curr_pos->input_name != pos->input_name)
  46                 fprintf(out, " of \"%s\"", pos->input_name);
  47 }
  48
  49 /**
  50  * Issue a diagnostic message.
  51  */
  52 static void diagnosticvf(const char *const fmt, va_list ap)
  53 {
  54         for (const char* f = fmt; *f != '\0'; ++f) {
  55                 if (*f == '%') {
  56                         ++f;
  57
  58                         bool extended = false;
  59                         if (*f == '#') {
  60                                 extended = true;
  61                                 ++f;
  62                         }
  63
  64                         switch (*f) {
  65                                 case '%':
  66                                         fputc(*f, stderr);
  67                                         break;
  68
  69                                 case 'c': {
  70                                         const unsigned char val = (unsigned char) va_arg(ap, int);
  71                                         fputc(val, stderr);
  72                                         break;
  73                                 }
  74
  75                                 case 'd': {
  76                                         const int val = va_arg(ap, int);
  77                                         fprintf(stderr, "%d", val);
  78                                         break;
  79                                 }
  80
  81                                 case 's': {
  82                                         const char* const str = va_arg(ap, const char*);
  83                                         fputs(str, stderr);
  84                                         break;
  85                                 }
  86
  87                                 case 'u': {
  88                                         const unsigned int val = va_arg(ap, unsigned int);
  89                                         fprintf(stderr, "%u", val);
  90                                         break;
  91                                 }
  92
  93                                 case 'Y': {
  94                                         const symbol_t *const symbol = va_arg(ap, const symbol_t*);
  95                                         if (symbol == NULL)
  96                                                 fputs("(null)", stderr);
  97                                         else
  98                                                 fputs(symbol->string, stderr);
  99                                         break;
 100                                 }
 101
 102                                 case 'E': {
 103                                         const expression_t* const expr = va_arg(ap, const expression_t*);
 104                                         print_expression(expr);
 105                                         break;
 106                                 }
 107
 108                                 case 'Q': {
 109                                         const unsigned qualifiers = va_arg(ap, unsigned);
 110                                         print_type_qualifiers(qualifiers);
 111                                         break;
 112                                 }
 113
 114                                 case 'T': {
 115                                         const type_t* const type = va_arg(ap, const type_t*);
 116                                         const symbol_t*     sym  = NULL;
 117                                         if (extended) {
 118                                                 sym = va_arg(ap, const symbol_t*);
 119                                         }
 120                                         print_type_ext(type, sym, NULL);
 121                                         break;
 122                                 }
 123
 124                                 case 't': {
 125                                         const token_t *const token = va_arg(ap, const token_t*);
 126                                         print_pp_token(stderr, token);
 127                                         break;
 128                                 }
 129
 130                                 case 'K': {
 131                                         const token_t* const token = va_arg(ap, const token_t*);
 132                                         print_token(stderr, token);
 133                                         break;
 134                                 }
 135
 136                                 case 'k': {
 137                                         if (extended) {
 138                                                 bool              first     = true;
 139                                                 va_list*          toks      = va_arg(ap, va_list*);
 140                                                 const char* const delimiter = va_arg(ap, const char*);
 141                                                 for (;;) {
 142                                                         const token_type_t tok = va_arg(*toks, token_type_t);
 143                                                         if (tok == 0)
 144                                                                 break;
 145                                                         if (first) {
 146                                                                 first = false;
 147                                                         } else {
 148                                                                 fputs(delimiter, stderr);
 149                                                         }
 150                                                         print_token_type(stderr, tok);
 151                                                 }
 152                                         } else {
 153                                                 const token_type_t token = va_arg(ap, token_type_t);
 154                                                 print_token_type(stderr, token);
 155                                         }
 156                                         break;
 157                                 }
 158
 159                                 case 'P': {
 160                                         const source_position_t *pos = va_arg(ap, const source_position_t *);
 161                                         print_source_position(stderr, pos);
 162                                         break;
 163                                 }
 164
 165                                 default:
 166                                         panic("unknown format specifier");
 167                         }
 168                 } else {
 169                         fputc(*f, stderr);
 170                 }
 171         }
 172 }
 173
 174 void diagnosticf(const char *const fmt, ...)
 175 {
 176         va_list ap;
 177         va_start(ap, fmt);
 178         ++diagnostic_count;
 179         curr_pos = NULL;
 180         diagnosticvf(fmt, ap);
 181         va_end(ap);
 182 }
 183
 184 static void errorvf(const source_position_t *pos,
 185                     const char *const fmt, va_list ap)
 186 {
 187         fprintf(stderr, "%s:%u: error: ", pos->input_name, pos->linenr);
 188         ++error_count;
 189         curr_pos = pos;
 190         diagnosticvf(fmt, ap);
 191         fputc('\n', stderr);
 192
 193         if (warning.fatal_errors)
 194                 exit(EXIT_FAILURE);
 195 }
 196
 197 void errorf(const source_position_t *pos, const char *const fmt, ...)
 198 {
 199         va_list ap;
 200         va_start(ap, fmt);
 201         curr_pos = pos;
 202         errorvf(pos, fmt, ap);
 203         va_end(ap);
 204 }
 205
 206 static void warningvf(const source_position_t *pos,
 207                       const char *const fmt, va_list ap)
 208 {
 209         fprintf(stderr, "%s:%u: warning: ", pos->input_name, pos->linenr);
 210         ++warning_count;
 211         curr_pos = pos;
 212         diagnosticvf(fmt, ap);
 213         fputc('\n', stderr);
 214 }
 215
 216 void warningf(const source_position_t *pos, const char *const fmt, ...)
 217 {
 218         va_list ap;
 219         va_start(ap, fmt);
 220         curr_pos = pos;
 221         if (warning.s_are_errors) {
 222                 errorvf(pos, fmt, ap);
 223         } else {
 224                 warningvf(pos, fmt, ap);
 225         }
 226         va_end(ap);
 227 }
 228
 229 static void internal_errorvf(const source_position_t *pos,
 230                     const char *const fmt, va_list ap)
 231 {
 232         fprintf(stderr, "%s:%u: internal error: ", pos->input_name, pos->linenr);
 233         curr_pos = pos;
 234         diagnosticvf(fmt, ap);
 235         fputc('\n', stderr);
 236 }
 237
 238 void internal_errorf(const source_position_t *pos, const char *const fmt, ...)
 239 {
 240         va_list ap;
 241         va_start(ap, fmt);
 242         curr_pos = pos;
 243         internal_errorvf(pos, fmt, ap);
 244         va_end(ap);
 245         abort();
 246 }