| 1 | /* |
| 2 | * error.c: Halibut error handling |
| 3 | */ |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <stdlib.h> |
| 7 | #include <stdarg.h> |
| 8 | #include "halibut.h" |
| 9 | |
| 10 | /* |
| 11 | * Error flags |
| 12 | */ |
| 13 | #define PREFIX 0x0001 /* give `halibut:' prefix */ |
| 14 | #define FILEPOS 0x0002 /* give file position prefix */ |
| 15 | |
| 16 | static void do_error(int code, va_list ap) { |
| 17 | char error[1024]; |
| 18 | char auxbuf[256]; |
| 19 | char *sp, *sp2; |
| 20 | wchar_t *wsp; |
| 21 | filepos fpos, fpos2; |
| 22 | int flags; |
| 23 | |
| 24 | switch(code) { |
| 25 | case err_nomemory: /* no arguments */ |
| 26 | sprintf(error, "out of memory"); |
| 27 | flags = PREFIX; |
| 28 | break; |
| 29 | case err_optnoarg: |
| 30 | sp = va_arg(ap, char *); |
| 31 | sprintf(error, "option `-%.200s' requires an argument", sp); |
| 32 | flags = PREFIX; |
| 33 | break; |
| 34 | case err_nosuchopt: |
| 35 | sp = va_arg(ap, char *); |
| 36 | sprintf(error, "unrecognised option `-%.200s'", sp); |
| 37 | flags = PREFIX; |
| 38 | break; |
| 39 | case err_noinput: /* no arguments */ |
| 40 | sprintf(error, "no input files"); |
| 41 | flags = PREFIX; |
| 42 | break; |
| 43 | case err_cantopen: |
| 44 | sp = va_arg(ap, char *); |
| 45 | sprintf(error, "unable to open input file `%.200s'", sp); |
| 46 | flags = PREFIX; |
| 47 | break; |
| 48 | case err_nodata: /* no arguments */ |
| 49 | sprintf(error, "no data in input files"); |
| 50 | flags = PREFIX; |
| 51 | break; |
| 52 | case err_brokencodepara: |
| 53 | fpos = *va_arg(ap, filepos *); |
| 54 | sprintf(error, "every line of a code paragraph should begin `\\c'"); |
| 55 | flags = FILEPOS; |
| 56 | break; |
| 57 | case err_kwunclosed: |
| 58 | fpos = *va_arg(ap, filepos *); |
| 59 | sprintf(error, "expected `}' after paragraph keyword"); |
| 60 | flags = FILEPOS; |
| 61 | break; |
| 62 | case err_kwexpected: |
| 63 | fpos = *va_arg(ap, filepos *); |
| 64 | sprintf(error, "expected a paragraph keyword"); |
| 65 | flags = FILEPOS; |
| 66 | break; |
| 67 | case err_kwillegal: |
| 68 | fpos = *va_arg(ap, filepos *); |
| 69 | sprintf(error, "expected no paragraph keyword"); |
| 70 | flags = FILEPOS; |
| 71 | break; |
| 72 | case err_kwtoomany: |
| 73 | fpos = *va_arg(ap, filepos *); |
| 74 | sprintf(error, "expected only one paragraph keyword"); |
| 75 | flags = FILEPOS; |
| 76 | break; |
| 77 | case err_bodyillegal: |
| 78 | fpos = *va_arg(ap, filepos *); |
| 79 | sprintf(error, "expected no text after paragraph keyword"); |
| 80 | flags = FILEPOS; |
| 81 | break; |
| 82 | case err_badparatype: |
| 83 | wsp = va_arg(ap, wchar_t *); |
| 84 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
| 85 | fpos = *va_arg(ap, filepos *); |
| 86 | sprintf(error, "command `%.200s' unrecognised at start of" |
| 87 | " paragraph", sp); |
| 88 | flags = FILEPOS; |
| 89 | break; |
| 90 | case err_badmidcmd: |
| 91 | wsp = va_arg(ap, wchar_t *); |
| 92 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
| 93 | fpos = *va_arg(ap, filepos *); |
| 94 | sprintf(error, "command `%.200s' unexpected in mid-paragraph", sp); |
| 95 | flags = FILEPOS; |
| 96 | break; |
| 97 | case err_unexbrace: |
| 98 | fpos = *va_arg(ap, filepos *); |
| 99 | sprintf(error, "brace character unexpected in mid-paragraph"); |
| 100 | flags = FILEPOS; |
| 101 | break; |
| 102 | case err_explbr: |
| 103 | fpos = *va_arg(ap, filepos *); |
| 104 | sprintf(error, "expected `{' after command"); |
| 105 | flags = FILEPOS; |
| 106 | break; |
| 107 | case err_commenteof: |
| 108 | fpos = *va_arg(ap, filepos *); |
| 109 | sprintf(error, "end of file unexpected inside `\\#{...}' comment"); |
| 110 | flags = FILEPOS; |
| 111 | break; |
| 112 | case err_kwexprbr: |
| 113 | fpos = *va_arg(ap, filepos *); |
| 114 | sprintf(error, "expected `}' after cross-reference"); |
| 115 | flags = FILEPOS; |
| 116 | break; |
| 117 | case err_missingrbrace: |
| 118 | fpos = *va_arg(ap, filepos *); |
| 119 | sprintf(error, "unclosed braces at end of paragraph"); |
| 120 | flags = FILEPOS; |
| 121 | break; |
| 122 | case err_missingrbrace2: |
| 123 | fpos = *va_arg(ap, filepos *); |
| 124 | sprintf(error, "unclosed braces at end of input file"); |
| 125 | flags = FILEPOS; |
| 126 | break; |
| 127 | case err_nestedstyles: |
| 128 | fpos = *va_arg(ap, filepos *); |
| 129 | sprintf(error, "unable to nest text styles"); |
| 130 | flags = FILEPOS; |
| 131 | break; |
| 132 | case err_nestedindex: |
| 133 | fpos = *va_arg(ap, filepos *); |
| 134 | sprintf(error, "unable to nest index markings"); |
| 135 | flags = FILEPOS; |
| 136 | break; |
| 137 | case err_nosuchkw: |
| 138 | fpos = *va_arg(ap, filepos *); |
| 139 | wsp = va_arg(ap, wchar_t *); |
| 140 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
| 141 | sprintf(error, "unable to resolve cross-reference to `%.200s'", sp); |
| 142 | flags = FILEPOS; |
| 143 | break; |
| 144 | case err_multiBR: |
| 145 | fpos = *va_arg(ap, filepos *); |
| 146 | wsp = va_arg(ap, wchar_t *); |
| 147 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
| 148 | sprintf(error, "multiple `\\BR' entries given for `%.200s'", sp); |
| 149 | flags = FILEPOS; |
| 150 | break; |
| 151 | case err_nosuchidxtag: |
| 152 | wsp = va_arg(ap, wchar_t *); |
| 153 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
| 154 | sprintf(error, "`\\IM' on unknown index tag `%.200s'", sp); |
| 155 | flags = 0; |
| 156 | /* FIXME: need to get a filepos to here somehow */ |
| 157 | break; |
| 158 | case err_cantopenw: |
| 159 | sp = va_arg(ap, char *); |
| 160 | sprintf(error, "unable to open output file `%.200s'", sp); |
| 161 | flags = PREFIX; |
| 162 | break; |
| 163 | case err_macroexists: |
| 164 | fpos = *va_arg(ap, filepos *); |
| 165 | wsp = va_arg(ap, wchar_t *); |
| 166 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
| 167 | sprintf(error, "macro `%.200s' already defined", sp); |
| 168 | flags = FILEPOS; |
| 169 | break; |
| 170 | case err_sectjump: |
| 171 | fpos = *va_arg(ap, filepos *); |
| 172 | sprintf(error, "expected higher heading levels before this one"); |
| 173 | flags = FILEPOS; |
| 174 | break; |
| 175 | case err_winhelp_ctxclash: |
| 176 | fpos = *va_arg(ap, filepos *); |
| 177 | sp = va_arg(ap, char *); |
| 178 | sp2 = va_arg(ap, char *); |
| 179 | sprintf(error, "Windows Help context id `%.200s' clashes with " |
| 180 | "previously defined `%.200s'", sp, sp2); |
| 181 | flags = FILEPOS; |
| 182 | break; |
| 183 | case err_multikw: |
| 184 | fpos = *va_arg(ap, filepos *); |
| 185 | fpos2 = *va_arg(ap, filepos *); |
| 186 | wsp = va_arg(ap, wchar_t *); |
| 187 | sp = ustrtoa(wsp, auxbuf, sizeof(auxbuf)); |
| 188 | sprintf(error, "paragraph keyword `%.200s' already defined at ", sp); |
| 189 | sprintf(error + strlen(error), "%s:%d", fpos2.filename, fpos2.line); |
| 190 | flags = FILEPOS; |
| 191 | break; |
| 192 | case err_misplacedlcont: |
| 193 | fpos = *va_arg(ap, filepos *); |
| 194 | sprintf(error, "\\lcont is only expected after a list item"); |
| 195 | flags = FILEPOS; |
| 196 | break; |
| 197 | case err_sectmarkerinlcont: |
| 198 | fpos = *va_arg(ap, filepos *); |
| 199 | sprintf(error, "section headings are not supported within \\lcont"); |
| 200 | flags = FILEPOS; |
| 201 | break; |
| 202 | case err_whatever: |
| 203 | sp = va_arg(ap, char *); |
| 204 | vsprintf(error, sp, ap); |
| 205 | flags = PREFIX; |
| 206 | break; |
| 207 | } |
| 208 | |
| 209 | if (flags & PREFIX) |
| 210 | fputs("halibut: ", stderr); |
| 211 | if (flags & FILEPOS) { |
| 212 | fprintf(stderr, "%s:%d:", fpos.filename, fpos.line); |
| 213 | if (fpos.col > 0) |
| 214 | fprintf(stderr, "%d:", fpos.col); |
| 215 | fputc(' ', stderr); |
| 216 | } |
| 217 | fputs(error, stderr); |
| 218 | fputc('\n', stderr); |
| 219 | } |
| 220 | |
| 221 | void fatal(int code, ...) { |
| 222 | va_list ap; |
| 223 | va_start(ap, code); |
| 224 | do_error(code, ap); |
| 225 | va_end(ap); |
| 226 | exit(EXIT_FAILURE); |
| 227 | } |
| 228 | |
| 229 | void error(int code, ...) { |
| 230 | va_list ap; |
| 231 | va_start(ap, code); |
| 232 | do_error(code, ap); |
| 233 | va_end(ap); |
| 234 | } |