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 "entity_t.h"
  26 #include "symbol_t.h"
  27 #include "token_t.h"
  28 #include "ast.h"
  29 #include "type.h"
  30 #include "warning.h"
  31
  32 /** Number of occurred diagnostics. */
  33 unsigned diagnostic_count    = 0;
  34 /** Number of occurred errors. */
  35 unsigned error_count         = 0;
  36 /** Number of occurred warnings. */
  37 unsigned warning_count       = 0;
  38 bool     show_column         = true;
  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, const source_position_t *pos)
  46 {
  47         fprintf(out, "at line %u", pos->lineno);
  48         if (show_column)
  49                 fprintf(out, ":%u", pos->colno);
  50         if (curr_pos == NULL || curr_pos->input_name != pos->input_name)
  51                 fprintf(out, " of \"%s\"", pos->input_name);
  52 }
  53
  54 /**
  55  * Issue a diagnostic message.
  56  */
  57 static void diagnosticvf(const char *const fmt, va_list ap)
  58 {
  59         for (const char* f = fmt; *f != '\0'; ++f) {
  60                 if (*f == '%') {
  61                         ++f;
  62
  63                         bool extended = false;
  64                         if (*f == '#') {
  65                                 extended = true;
  66                                 ++f;
  67                         }
  68
  69                         switch (*f) {
  70                                 case '%':
  71                                         fputc(*f, stderr);
  72                                         break;
  73
  74                                 case 'c': {
  75                                         const unsigned char val = (unsigned char) va_arg(ap, int);
  76                                         fputc(val, stderr);
  77                                         break;
  78                                 }
  79
  80                                 case 'd': {
  81                                         const int val = va_arg(ap, int);
  82                                         fprintf(stderr, "%d", val);
  83                                         break;
  84                                 }
  85
  86                                 case 's': {
  87                                         const char* const str = va_arg(ap, const char*);
  88                                         fputs(str, stderr);
  89                                         break;
  90                                 }
  91
  92                                 case 'S': {
  93                                         const string_t *str = va_arg(ap, const string_t*);
  94                                         for (size_t i = 0; i < str->size; ++i) {
  95                                                 fputc(str->begin[i], stderr);
  96                                         }
  97                                         break;
  98                                 }
  99
 100                                 case 'u': {
 101                                         const unsigned int val = va_arg(ap, unsigned int);
 102                                         fprintf(stderr, "%u", val);
 103                                         break;
 104                                 }
 105
 106                                 case 'Y': {
 107                                         const symbol_t *const symbol = va_arg(ap, const symbol_t*);
 108                                         if (symbol == NULL)
 109                                                 fputs("(null)", stderr);
 110                                         else
 111                                                 fputs(symbol->string, stderr);
 112                                         break;
 113                                 }
 114
 115                                 case 'E': {
 116                                         const expression_t* const expr = va_arg(ap, const expression_t*);
 117                                         print_expression(expr);
 118                                         break;
 119                                 }
 120
 121                                 case 'Q': {
 122                                         const unsigned qualifiers = va_arg(ap, unsigned);
 123                                         print_type_qualifiers(qualifiers, QUAL_SEP_NONE);
 124                                         break;
 125                                 }
 126
 127                                 case 'T': {
 128                                         const type_t* const type = va_arg(ap, const type_t*);
 129                                         const symbol_t*     sym  = NULL;
 130                                         if (extended) {
 131                                                 sym = va_arg(ap, const symbol_t*);
 132                                         }
 133                                         print_type_ext(type, sym, NULL);
 134                                         break;
 135                                 }
 136
 137                                 case 't': {
 138                                         const token_t *const token = va_arg(ap, const token_t*);
 139                                         print_pp_token(stderr, token);
 140                                         break;
 141                                 }
 142
 143                                 case 'K': {
 144                                         const token_t* const token = va_arg(ap, const token_t*);
 145                                         print_token(stderr, token);
 146                                         break;
 147                                 }
 148
 149                                 case 'k': {
 150                                         if (extended) {
 151                                                 bool              first     = true;
 152                                                 va_list*          toks      = va_arg(ap, va_list*);
 153                                                 const char* const delimiter = va_arg(ap, const char*);
 154                                                 for (;;) {
 155                                                         const token_type_t tok = va_arg(*toks, token_type_t);
 156                                                         if (tok == 0)
 157                                                                 break;
 158                                                         if (first) {
 159                                                                 first = false;
 160                                                         } else {
 161                                                                 fputs(delimiter, stderr);
 162                                                         }
 163                                                         print_token_type(stderr, tok);
 164                                                 }
 165                                         } else {
 166                                                 const token_type_t token = va_arg(ap, token_type_t);
 167                                                 print_token_type(stderr, token);
 168                                         }
 169                                         break;
 170                                 }
 171
 172                                 case 'N': {
 173                                         entity_t const *const ent = va_arg(ap, entity_t const*);
 174                                         if (extended && is_declaration(ent)) {
 175                                                 print_type_ext(ent->declaration.type, ent->base.symbol, NULL);
 176                                         } else {
 177                                                 char     const *const kind = get_entity_kind_name(ent->kind);
 178                                                 symbol_t const *const sym  = ent->base.symbol;
 179                                                 if (sym) {
 180                                                         fprintf(stderr, "%s %s", kind, sym->string);
 181                                                 } else {
 182                                                         fprintf(stderr, "anonymous %s", kind);
 183                                                 }
 184                                         }
 185                                         break;
 186                                 }
 187
 188                                 case 'P': {
 189                                         const source_position_t *pos = va_arg(ap, const source_position_t *);
 190                                         print_source_position(stderr, pos);
 191                                         break;
 192                                 }
 193
 194                                 default:
 195                                         panic("unknown format specifier");
 196                         }
 197                 } else {
 198                         fputc(*f, stderr);
 199                 }
 200         }
 201 }
 202
 203 void diagnosticf(const char *const fmt, ...)
 204 {
 205         va_list ap;
 206         va_start(ap, fmt);
 207         ++diagnostic_count;
 208         curr_pos = NULL;
 209         diagnosticvf(fmt, ap);
 210         va_end(ap);
 211 }
 212
 213 static void diagnosticposvf(source_position_t const *const pos, char const *const kind, char const *const fmt, va_list ap)
 214 {
 215         FILE *const out = stderr;
 216         fprintf(out, "%s:%u:", pos->input_name, pos->lineno);
 217         if (show_column)
 218                 fprintf(out, "%u:", pos->colno);
 219         fprintf(out, " %s: ", kind);
 220         curr_pos = pos;
 221         diagnosticvf(fmt, ap);
 222 }
 223
 224 static void errorvf(const source_position_t *pos,
 225                     const char *const fmt, va_list ap)
 226 {
 227         curr_pos = pos;
 228         ++error_count;
 229         diagnosticposvf(pos, "error", fmt, ap);
 230         fputc('\n', stderr);
 231         if (is_warn_on(WARN_FATAL_ERRORS))
 232                 exit(EXIT_FAILURE);
 233 }
 234
 235 void errorf(const source_position_t *pos, const char *const fmt, ...)
 236 {
 237         va_list ap;
 238         va_start(ap, fmt);
 239         errorvf(pos, fmt, ap);
 240         va_end(ap);
 241 }
 242
 243 void warningf(warning_t const warn, source_position_t const* pos, char const *const fmt, ...)
 244 {
 245         va_list ap;
 246         va_start(ap, fmt);
 247         warning_switch_t const *const s = get_warn_switch(warn);
 248         switch (s->state) {
 249                         char const* kind;
 250                 case WARN_STATE_ON:
 251                         if (is_warn_on(WARN_ERROR)) {
 252                 case WARN_STATE_ON | WARN_STATE_ERROR:
 253                                 ++error_count;
 254                                 kind = "error";
 255                         } else {
 256                 case WARN_STATE_ON | WARN_STATE_NO_ERROR:
 257                                 ++warning_count;
 258                                 kind = "warning";
 259                         }
 260                         diagnosticposvf(pos, kind, fmt, ap);
 261                         fprintf(stderr, " [-W%s]\n", s->name);
 262                         break;
 263
 264                 default:
 265                         break;
 266         }
 267         va_end(ap);
 268 }
 269
 270 static void internal_errorvf(const source_position_t *pos,
 271                     const char *const fmt, va_list ap)
 272 {
 273         diagnosticposvf(pos, "internal error", fmt, ap);
 274         fputc('\n', stderr);
 275 }
 276
 277 void internal_errorf(const source_position_t *pos, const char *const fmt, ...)
 278 {
 279         va_list ap;
 280         va_start(ap, fmt);
 281         curr_pos = pos;
 282         internal_errorvf(pos, fmt, ap);
 283         va_end(ap);
 284         abort();
 285 }