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