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 bool     diagnostics_show_option = true;
  40
  41 static const source_position_t *curr_pos = NULL;
  42
  43 /**
  44  * prints an additional source position
  45  */
  46 static void print_source_position(FILE *out, const source_position_t *pos)
  47 {
  48         fprintf(out, "at line %u", pos->lineno);
  49         if (show_column)
  50                 fprintf(out, ":%u", (unsigned)pos->colno);
  51         if (curr_pos == NULL || curr_pos->input_name != pos->input_name)
  52                 fprintf(out, " of \"%s\"", pos->input_name);
  53 }
  54
  55 /**
  56  * Issue a diagnostic message.
  57  */
  58 static void diagnosticvf(const char *const fmt, va_list ap)
  59 {
  60         for (const char* f = fmt; *f != '\0'; ++f) {
  61                 if (*f == '%') {
  62                         ++f;
  63
  64                         bool extended  = false;
  65                         bool flag_zero = false;
  66                         for (;; ++f) {
  67                                 switch (*f) {
  68                                 case '#': extended  = true; break;
  69                                 case '0': flag_zero = true; break;
  70                                 default:  goto done_flags;
  71                                 }
  72                         }
  73 done_flags:;
  74
  75                         int field_width = 0;
  76                         if (*f == '*') {
  77                                 ++f;
  78                                 field_width = va_arg(ap, int);
  79                         }
  80
  81                         switch (*f) {
  82                                 case '%':
  83                                         fputc(*f, stderr);
  84                                         break;
  85
  86                                 case 'c': {
  87                                         const unsigned char val = (unsigned char) va_arg(ap, int);
  88                                         fputc(val, stderr);
  89                                         break;
  90                                 }
  91
  92                                 case 'd': {
  93                                         const int val = va_arg(ap, int);
  94                                         fprintf(stderr, "%d", val);
  95                                         break;
  96                                 }
  97
  98                                 case 's': {
  99                                         const char* const str = va_arg(ap, const char*);
 100                                         fputs(str, stderr);
 101                                         break;
 102                                 }
 103
 104                                 case 'S': {
 105                                         const string_t *str = va_arg(ap, const string_t*);
 106                                         for (size_t i = 0; i < str->size; ++i) {
 107                                                 fputc(str->begin[i], stderr);
 108                                         }
 109                                         break;
 110                                 }
 111
 112                                 case 'u': {
 113                                         const unsigned int val = va_arg(ap, unsigned int);
 114                                         fprintf(stderr, "%u", val);
 115                                         break;
 116                                 }
 117
 118                                 case 'X': {
 119                                         unsigned int const val = va_arg(ap, unsigned int);
 120                                         char const  *const fmt = flag_zero ? "%0*X" : "%*X";
 121                                         fprintf(stderr, fmt, field_width, val);
 122                                         break;
 123                                 }
 124
 125                                 case 'Y': {
 126                                         const symbol_t *const symbol = va_arg(ap, const symbol_t*);
 127                                         if (symbol == NULL)
 128                                                 fputs("(null)", stderr);
 129                                         else
 130                                                 fputs(symbol->string, stderr);
 131                                         break;
 132                                 }
 133
 134                                 case 'E': {
 135                                         const expression_t* const expr = va_arg(ap, const expression_t*);
 136                                         print_expression(expr);
 137                                         break;
 138                                 }
 139
 140                                 case 'Q': {
 141                                         const unsigned qualifiers = va_arg(ap, unsigned);
 142                                         print_type_qualifiers(qualifiers, QUAL_SEP_NONE);
 143                                         break;
 144                                 }
 145
 146                                 case 'T': {
 147                                         const type_t* const type = va_arg(ap, const type_t*);
 148                                         const symbol_t*     sym  = NULL;
 149                                         if (extended) {
 150                                                 sym = va_arg(ap, const symbol_t*);
 151                                         }
 152                                         print_type_ext(type, sym, NULL);
 153                                         break;
 154                                 }
 155
 156                                 case 't': {
 157                                         const token_t *const token = va_arg(ap, const token_t*);
 158                                         print_pp_token(stderr, token);
 159                                         break;
 160                                 }
 161
 162                                 case 'K': {
 163                                         const token_t* const token = va_arg(ap, const token_t*);
 164                                         print_token(stderr, token);
 165                                         break;
 166                                 }
 167
 168                                 case 'k': {
 169                                         if (extended) {
 170                                                 bool              first     = true;
 171                                                 va_list*          toks      = va_arg(ap, va_list*);
 172                                                 const char* const delimiter = va_arg(ap, const char*);
 173                                                 for (;;) {
 174                                                         const token_kind_t tok = va_arg(*toks, token_kind_t);
 175                                                         if (tok == 0)
 176                                                                 break;
 177                                                         if (first) {
 178                                                                 first = false;
 179                                                         } else {
 180                                                                 fputs(delimiter, stderr);
 181                                                         }
 182                                                         print_token_kind(stderr, tok);
 183                                                 }
 184                                         } else {
 185                                                 const token_kind_t token = va_arg(ap, token_kind_t);
 186                                                 print_token_kind(stderr, token);
 187                                         }
 188                                         break;
 189                                 }
 190
 191                                 case 'N': {
 192                                         entity_t const *const ent = va_arg(ap, entity_t const*);
 193                                         if (extended && is_declaration(ent)) {
 194                                                 print_type_ext(ent->declaration.type, ent->base.symbol, NULL);
 195                                         } else {
 196                                                 char     const *const kind = get_entity_kind_name(ent->kind);
 197                                                 symbol_t const *const sym  = ent->base.symbol;
 198                                                 if (sym) {
 199                                                         fprintf(stderr, "%s %s", kind, sym->string);
 200                                                 } else {
 201                                                         fprintf(stderr, "anonymous %s", kind);
 202                                                 }
 203                                         }
 204                                         break;
 205                                 }
 206
 207                                 case 'P': {
 208                                         const source_position_t *pos = va_arg(ap, const source_position_t *);
 209                                         print_source_position(stderr, pos);
 210                                         break;
 211                                 }
 212
 213                                 default:
 214                                         panic("unknown format specifier");
 215                         }
 216                 } else {
 217                         fputc(*f, stderr);
 218                 }
 219         }
 220 }
 221
 222 void diagnosticf(const char *const fmt, ...)
 223 {
 224         va_list ap;
 225         va_start(ap, fmt);
 226         ++diagnostic_count;
 227         curr_pos = NULL;
 228         diagnosticvf(fmt, ap);
 229         va_end(ap);
 230 }
 231
 232 static void diagnosticposvf(source_position_t const *const pos, char const *const kind, char const *const fmt, va_list ap)
 233 {
 234         FILE *const out = stderr;
 235         fprintf(out, "%s:%u:", pos->input_name, pos->lineno);
 236         if (show_column)
 237                 fprintf(out, "%u:", (unsigned)pos->colno);
 238         fprintf(out, " %s: ", kind);
 239         curr_pos = pos;
 240         diagnosticvf(fmt, ap);
 241 }
 242
 243 static void errorvf(const source_position_t *pos,
 244                     const char *const fmt, va_list ap)
 245 {
 246         curr_pos = pos;
 247         ++error_count;
 248         diagnosticposvf(pos, "error", fmt, ap);
 249         fputc('\n', stderr);
 250         if (is_warn_on(WARN_FATAL_ERRORS))
 251                 exit(EXIT_FAILURE);
 252 }
 253
 254 void errorf(const source_position_t *pos, const char *const fmt, ...)
 255 {
 256         va_list ap;
 257         va_start(ap, fmt);
 258         errorvf(pos, fmt, ap);
 259         va_end(ap);
 260 }
 261
 262 void warningf(warning_t const warn, source_position_t const* pos, char const *const fmt, ...)
 263 {
 264         va_list ap;
 265         va_start(ap, fmt);
 266         warning_switch_t const *const s = get_warn_switch(warn);
 267         switch ((unsigned) s->state) {
 268                         char const* kind;
 269                 case WARN_STATE_ON:
 270                         if (is_warn_on(WARN_ERROR)) {
 271                 case WARN_STATE_ON | WARN_STATE_ERROR:
 272                                 ++error_count;
 273                                 kind = "error";
 274                         } else {
 275                 case WARN_STATE_ON | WARN_STATE_NO_ERROR:
 276                                 ++warning_count;
 277                                 kind = "warning";
 278                         }
 279                         diagnosticposvf(pos, kind, fmt, ap);
 280                         if (diagnostics_show_option)
 281                                 fprintf(stderr, " [-W%s]\n", s->name);
 282                         break;
 283
 284                 default:
 285                         break;
 286         }
 287         va_end(ap);
 288 }
 289
 290 static void internal_errorvf(const source_position_t *pos,
 291                     const char *const fmt, va_list ap)
 292 {
 293         diagnosticposvf(pos, "internal error", fmt, ap);
 294         fputc('\n', stderr);
 295 }
 296
 297 void internal_errorf(const source_position_t *pos, const char *const fmt, ...)
 298 {
 299         va_list ap;
 300         va_start(ap, fmt);
 301         curr_pos = pos;
 302         internal_errorvf(pos, fmt, ap);
 303         va_end(ap);
 304         abort();
 305 }