nsz Git - cparser/blob - diagnostic.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 <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 {
  45         fprintf(out, "at line %u", pos->lineno);
  46         if (curr_pos == NULL || curr_pos->input_name != pos->input_name)
  47                 fprintf(out, " of \"%s\"", pos->input_name);
  48 }
  49
  50 /**
  51  * Issue a diagnostic message.
  52  */
  53 static void diagnosticvf(const char *const fmt, va_list ap)
  54 {
  55         for (const char* f = fmt; *f != '\0'; ++f) {
  56                 if (*f == '%') {
  57                         ++f;
  58
  59                         bool extended = false;
  60                         if (*f == '#') {
  61                                 extended = true;
  62                                 ++f;
  63                         }
  64
  65                         switch (*f) {
  66                                 case '%':
  67                                         fputc(*f, stderr);
  68                                         break;
  69
  70                                 case 'c': {
  71                                         const unsigned char val = (unsigned char) va_arg(ap, int);
  72                                         fputc(val, stderr);
  73                                         break;
  74                                 }
  75
  76                                 case 'd': {
  77                                         const int val = va_arg(ap, int);
  78                                         fprintf(stderr, "%d", val);
  79                                         break;
  80                                 }
  81
  82                                 case 's': {
  83                                         const char* const str = va_arg(ap, const char*);
  84                                         fputs(str, stderr);
  85                                         break;
  86                                 }
  87
  88                                 case 'S': {
  89                                         const string_t *str = va_arg(ap, const string_t*);
  90                                         for (size_t i = 0; i < str->size; ++i) {
  91                                                 fputc(str->begin[i], stderr);
  92                                         }
  93                                         break;
  94                                 }
  95
  96                                 case 'u': {
  97                                         const unsigned int val = va_arg(ap, unsigned int);
  98                                         fprintf(stderr, "%u", val);
  99                                         break;
 100                                 }
 101
 102                                 case 'Y': {
 103                                         const symbol_t *const symbol = va_arg(ap, const symbol_t*);
 104                                         if (symbol == NULL)
 105                                                 fputs("(null)", stderr);
 106                                         else
 107                                                 fputs(symbol->string, stderr);
 108                                         break;
 109                                 }
 110
 111                                 case 'E': {
 112                                         const expression_t* const expr = va_arg(ap, const expression_t*);
 113                                         print_expression(expr);
 114                                         break;
 115                                 }
 116
 117                                 case 'Q': {
 118                                         const unsigned qualifiers = va_arg(ap, unsigned);
 119                                         print_type_qualifiers(qualifiers, QUAL_SEP_NONE);
 120                                         break;
 121                                 }
 122
 123                                 case 'T': {
 124                                         const type_t* const type = va_arg(ap, const type_t*);
 125                                         const symbol_t*     sym  = NULL;
 126                                         if (extended) {
 127                                                 sym = va_arg(ap, const symbol_t*);
 128                                         }
 129                                         print_type_ext(type, sym, NULL);
 130                                         break;
 131                                 }
 132
 133                                 case 't': {
 134                                         const token_t *const token = va_arg(ap, const token_t*);
 135                                         print_pp_token(stderr, token);
 136                                         break;
 137                                 }
 138
 139                                 case 'K': {
 140                                         const token_t* const token = va_arg(ap, const token_t*);
 141                                         print_token(stderr, token);
 142                                         break;
 143                                 }
 144
 145                                 case 'k': {
 146                                         if (extended) {
 147                                                 bool              first     = true;
 148                                                 va_list*          toks      = va_arg(ap, va_list*);
 149                                                 const char* const delimiter = va_arg(ap, const char*);
 150                                                 for (;;) {
 151                                                         const token_type_t tok = va_arg(*toks, token_type_t);
 152                                                         if (tok == 0)
 153                                                                 break;
 154                                                         if (first) {
 155                                                                 first = false;
 156                                                         } else {
 157                                                                 fputs(delimiter, stderr);
 158                                                         }
 159                                                         print_token_type(stderr, tok);
 160                                                 }
 161                                         } else {
 162                                                 const token_type_t token = va_arg(ap, token_type_t);
 163                                                 print_token_type(stderr, token);
 164                                         }
 165                                         break;
 166                                 }
 167
 168                                 case 'P': {
 169                                         const source_position_t *pos = va_arg(ap, const source_position_t *);
 170                                         print_source_position(stderr, pos);
 171                                         break;
 172                                 }
 173
 174                                 default:
 175                                         panic("unknown format specifier");
 176                         }
 177                 } else {
 178                         fputc(*f, stderr);
 179                 }
 180         }
 181 }
 182
 183 void diagnosticf(const char *const fmt, ...)
 184 {
 185         va_list ap;
 186         va_start(ap, fmt);
 187         ++diagnostic_count;
 188         curr_pos = NULL;
 189         diagnosticvf(fmt, ap);
 190         va_end(ap);
 191 }
 192
 193 static void diagnosticposvf(source_position_t const *const pos, char const *const kind, char const *const fmt, va_list ap)
 194 {
 195         FILE *const out = stderr;
 196         fprintf(out, "%s:%u: %s: ", pos->input_name, pos->lineno, kind);
 197         curr_pos = pos;
 198         diagnosticvf(fmt, ap);
 199         fputc('\n', out);
 200 }
 201
 202 static void errorvf(const source_position_t *pos,
 203                     const char *const fmt, va_list ap)
 204 {
 205         ++error_count;
 206         diagnosticposvf(pos, "error", fmt, ap);
 207         if (warning.fatal_errors)
 208                 exit(EXIT_FAILURE);
 209 }
 210
 211 void errorf(const source_position_t *pos, const char *const fmt, ...)
 212 {
 213         va_list ap;
 214         va_start(ap, fmt);
 215         curr_pos = pos;
 216         errorvf(pos, fmt, ap);
 217         va_end(ap);
 218 }
 219
 220 static void warningvf(const source_position_t *pos,
 221                       const char *const fmt, va_list ap)
 222 {
 223         ++warning_count;
 224         diagnosticposvf(pos, "warning", fmt, ap);
 225 }
 226
 227 void warningf(const source_position_t *pos, const char *const fmt, ...)
 228 {
 229         va_list ap;
 230         va_start(ap, fmt);
 231         curr_pos = pos;
 232         if (warning.s_are_errors) {
 233                 errorvf(pos, fmt, ap);
 234         } else {
 235                 warningvf(pos, fmt, ap);
 236         }
 237         va_end(ap);
 238 }
 239
 240 static void internal_errorvf(const source_position_t *pos,
 241                     const char *const fmt, va_list ap)
 242 {
 243         diagnosticposvf(pos, "internal error", fmt, ap);
 244 }
 245
 246 void internal_errorf(const source_position_t *pos, const char *const fmt, ...)
 247 {
 248         va_list ap;
 249         va_start(ap, fmt);
 250         curr_pos = pos;
 251         internal_errorvf(pos, fmt, ap);
 252         va_end(ap);
 253         abort();
 254 }