1 /* Default error handlers for CPP Library. 2 Copyright (C) 1986-2016 Free Software Foundation, Inc. 3 Written by Per Bothner, 1994. 4 Based on CCCP program by Paul Rubin, June 1986 5 Adapted to ANSI C, Richard Stallman, Jan 1987 6 7 This program is free software; you can redistribute it and/or modify it 8 under the terms of the GNU General Public License as published by the 9 Free Software Foundation; either version 3, or (at your option) any 10 later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; see the file COPYING3. If not see 19 <http://www.gnu.org/licenses/>. 20 21 In other words, you are welcome to use, share and improve this program. 22 You are forbidden to forbid anyone else to use, share and improve 23 what you give them. Help stamp out software-hoarding! */ 24 25 #include "config.h" 26 #include "system.h" 27 #include "cpplib.h" 28 #include "internal.h" 29 30 /* Print a diagnostic at the location of the previously lexed token. */ 31 32 ATTRIBUTE_FPTR_PRINTF(4,0) 33 static bool 34 cpp_diagnostic (cpp_reader * pfile, int level, int reason, 35 const char *msgid, va_list *ap) 36 { 37 source_location src_loc; 38 bool ret; 39 40 if (CPP_OPTION (pfile, traditional)) 41 { 42 if (pfile->state.in_directive) 43 src_loc = pfile->directive_line; 44 else 45 src_loc = pfile->line_table->highest_line; 46 } 47 /* We don't want to refer to a token before the beginning of the 48 current run -- that is invalid. */ 49 else if (pfile->cur_token == pfile->cur_run->base) 50 { 51 src_loc = 0; 52 } 53 else 54 { 55 src_loc = pfile->cur_token[-1].src_loc; 56 } 57 58 if (!pfile->cb.error) 59 abort (); 60 rich_location richloc (pfile->line_table, src_loc); 61 ret = pfile->cb.error (pfile, level, reason, &richloc, _(msgid), ap); 62 63 return ret; 64 } 65 66 /* Print a warning or error, depending on the value of LEVEL. */ 67 68 bool 69 cpp_error (cpp_reader * pfile, int level, const char *msgid, ...) 70 { 71 va_list ap; 72 bool ret; 73 74 va_start (ap, msgid); 75 76 ret = cpp_diagnostic (pfile, level, CPP_W_NONE, msgid, &ap); 77 78 va_end (ap); 79 return ret; 80 } 81 82 /* Print a warning. The warning reason may be given in REASON. */ 83 84 bool 85 cpp_warning (cpp_reader * pfile, int reason, const char *msgid, ...) 86 { 87 va_list ap; 88 bool ret; 89 90 va_start (ap, msgid); 91 92 ret = cpp_diagnostic (pfile, CPP_DL_WARNING, reason, msgid, &ap); 93 94 va_end (ap); 95 return ret; 96 } 97 98 /* Print a pedantic warning. The warning reason may be given in REASON. */ 99 100 bool 101 cpp_pedwarning (cpp_reader * pfile, int reason, const char *msgid, ...) 102 { 103 va_list ap; 104 bool ret; 105 106 va_start (ap, msgid); 107 108 ret = cpp_diagnostic (pfile, CPP_DL_PEDWARN, reason, msgid, &ap); 109 110 va_end (ap); 111 return ret; 112 } 113 114 /* Print a warning, including system headers. The warning reason may be 115 given in REASON. */ 116 117 bool 118 cpp_warning_syshdr (cpp_reader * pfile, int reason, const char *msgid, ...) 119 { 120 va_list ap; 121 bool ret; 122 123 va_start (ap, msgid); 124 125 ret = cpp_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, reason, msgid, &ap); 126 127 va_end (ap); 128 return ret; 129 } 130 131 /* Print a diagnostic at a specific location. */ 132 133 ATTRIBUTE_FPTR_PRINTF(6,0) 134 static bool 135 cpp_diagnostic_with_line (cpp_reader * pfile, int level, int reason, 136 source_location src_loc, unsigned int column, 137 const char *msgid, va_list *ap) 138 { 139 bool ret; 140 141 if (!pfile->cb.error) 142 abort (); 143 rich_location richloc (pfile->line_table, src_loc); 144 if (column) 145 richloc.override_column (column); 146 ret = pfile->cb.error (pfile, level, reason, &richloc, _(msgid), ap); 147 148 return ret; 149 } 150 151 /* Print a warning or error, depending on the value of LEVEL. */ 152 153 bool 154 cpp_error_with_line (cpp_reader *pfile, int level, 155 source_location src_loc, unsigned int column, 156 const char *msgid, ...) 157 { 158 va_list ap; 159 bool ret; 160 161 va_start (ap, msgid); 162 163 ret = cpp_diagnostic_with_line (pfile, level, CPP_W_NONE, src_loc, 164 column, msgid, &ap); 165 166 va_end (ap); 167 return ret; 168 } 169 170 /* Print a warning. The warning reason may be given in REASON. */ 171 172 bool 173 cpp_warning_with_line (cpp_reader *pfile, int reason, 174 source_location src_loc, unsigned int column, 175 const char *msgid, ...) 176 { 177 va_list ap; 178 bool ret; 179 180 va_start (ap, msgid); 181 182 ret = cpp_diagnostic_with_line (pfile, CPP_DL_WARNING, reason, src_loc, 183 column, msgid, &ap); 184 185 va_end (ap); 186 return ret; 187 } 188 189 /* Print a pedantic warning. The warning reason may be given in REASON. */ 190 191 bool 192 cpp_pedwarning_with_line (cpp_reader *pfile, int reason, 193 source_location src_loc, unsigned int column, 194 const char *msgid, ...) 195 { 196 va_list ap; 197 bool ret; 198 199 va_start (ap, msgid); 200 201 ret = cpp_diagnostic_with_line (pfile, CPP_DL_PEDWARN, reason, src_loc, 202 column, msgid, &ap); 203 204 va_end (ap); 205 return ret; 206 } 207 208 /* Print a warning, including system headers. The warning reason may be 209 given in REASON. */ 210 211 bool 212 cpp_warning_with_line_syshdr (cpp_reader *pfile, int reason, 213 source_location src_loc, unsigned int column, 214 const char *msgid, ...) 215 { 216 va_list ap; 217 bool ret; 218 219 va_start (ap, msgid); 220 221 ret = cpp_diagnostic_with_line (pfile, CPP_DL_WARNING_SYSHDR, reason, src_loc, 222 column, msgid, &ap); 223 224 va_end (ap); 225 return ret; 226 } 227 228 /* Print a warning or error, depending on the value of LEVEL. Include 229 information from errno. */ 230 231 bool 232 cpp_errno (cpp_reader *pfile, int level, const char *msgid) 233 { 234 return cpp_error (pfile, level, "%s: %s", _(msgid), xstrerror (errno)); 235 } 236 237 /* Print a warning or error, depending on the value of LEVEL. Include 238 information from errno. Unlike cpp_errno, the argument is a filename 239 that is not localized, but "" is replaced with localized "stdout". */ 240 241 bool 242 cpp_errno_filename (cpp_reader *pfile, int level, const char *filename) 243 { 244 if (filename[0] == '\0') 245 filename = _("stdout"); 246 247 return cpp_error (pfile, level, "%s: %s", filename, xstrerror (errno)); 248 } 249