| 1 | #include "stralloc.h" |
| 2 | #include "alloc.h" |
| 3 | #include "str.h" |
| 4 | #include "token822.h" |
| 5 | #include "gen_allocdefs.h" |
| 6 | |
| 7 | static struct token822 comma = { TOKEN822_COMMA }; |
| 8 | |
| 9 | void token822_reverse(ta) |
| 10 | token822_alloc *ta; |
| 11 | { |
| 12 | int i; |
| 13 | int n; |
| 14 | struct token822 temp; |
| 15 | |
| 16 | n = ta->len - 1; |
| 17 | for (i = 0;i + i < n;++i) |
| 18 | { |
| 19 | temp = ta->t[i]; |
| 20 | ta->t[i] = ta->t[n - i]; |
| 21 | ta->t[n - i] = temp; |
| 22 | } |
| 23 | } |
| 24 | |
| 25 | GEN_ALLOC_ready(token822_alloc,struct token822,t,len,a,i,n,x,30,token822_ready) |
| 26 | GEN_ALLOC_readyplus(token822_alloc,struct token822,t,len,a,i,n,x,30,token822_readyplus) |
| 27 | GEN_ALLOC_append(token822_alloc,struct token822,t,len,a,i,n,x,30,token822_readyplus,token822_append) |
| 28 | |
| 29 | static int needspace(t1,t2) |
| 30 | int t1; |
| 31 | int t2; |
| 32 | { |
| 33 | if (!t1) return 0; |
| 34 | if (t1 == TOKEN822_COLON) return 1; |
| 35 | if (t1 == TOKEN822_COMMA) return 1; |
| 36 | if (t2 == TOKEN822_LEFT) return 1; |
| 37 | switch(t1) |
| 38 | { |
| 39 | case TOKEN822_ATOM: case TOKEN822_LITERAL: |
| 40 | case TOKEN822_QUOTE: case TOKEN822_COMMENT: |
| 41 | switch(t2) |
| 42 | { |
| 43 | case TOKEN822_ATOM: case TOKEN822_LITERAL: |
| 44 | case TOKEN822_QUOTE: case TOKEN822_COMMENT: |
| 45 | return 1; |
| 46 | } |
| 47 | } |
| 48 | return 0; |
| 49 | } |
| 50 | |
| 51 | static int atomok(ch) |
| 52 | char ch; |
| 53 | { |
| 54 | switch(ch) |
| 55 | { |
| 56 | case ' ': case '\t': case '\r': case '\n': |
| 57 | case '(': case '[': case '"': |
| 58 | case '<': case '>': case ';': case ':': |
| 59 | case '@': case ',': case '.': |
| 60 | return 0; |
| 61 | } |
| 62 | return 1; |
| 63 | } |
| 64 | |
| 65 | static void atomcheck(t) |
| 66 | struct token822 *t; |
| 67 | { |
| 68 | int i; |
| 69 | char ch; |
| 70 | for (i = 0;i < t->slen;++i) |
| 71 | { |
| 72 | ch = t->s[i]; |
| 73 | if ((ch < 32) || (ch > 126) || (ch == ')') || (ch == ']') || (ch == '\\')) |
| 74 | { |
| 75 | t->type = TOKEN822_QUOTE; |
| 76 | return; |
| 77 | } |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | int token822_unparse(sa,ta,linelen) |
| 82 | stralloc *sa; |
| 83 | token822_alloc *ta; |
| 84 | unsigned int linelen; |
| 85 | { |
| 86 | struct token822 *t; |
| 87 | int len; |
| 88 | int ch; |
| 89 | int i; |
| 90 | int j; |
| 91 | int lasttype; |
| 92 | int newtype; |
| 93 | char *s; |
| 94 | char *lineb; |
| 95 | char *linee; |
| 96 | |
| 97 | len = 0; |
| 98 | lasttype = 0; |
| 99 | for (i = 0;i < ta->len;++i) |
| 100 | { |
| 101 | t = ta->t + i; |
| 102 | newtype = t->type; |
| 103 | if (needspace(lasttype,newtype)) |
| 104 | ++len; |
| 105 | lasttype = newtype; |
| 106 | switch(newtype) |
| 107 | { |
| 108 | case TOKEN822_COMMA: |
| 109 | len += 3; break; |
| 110 | case TOKEN822_AT: case TOKEN822_DOT: case TOKEN822_LEFT: case TOKEN822_RIGHT: |
| 111 | case TOKEN822_SEMI: case TOKEN822_COLON: |
| 112 | ++len; break; |
| 113 | case TOKEN822_ATOM: case TOKEN822_QUOTE: case TOKEN822_LITERAL: case TOKEN822_COMMENT: |
| 114 | if (t->type != TOKEN822_ATOM) len += 2; |
| 115 | for (j = 0;j < t->slen;++j) |
| 116 | switch(ch = t->s[j]) |
| 117 | { |
| 118 | case '"': case '[': case ']': case '(': case ')': |
| 119 | case '\\': case '\r': case '\n': ++len; |
| 120 | default: ++len; |
| 121 | } |
| 122 | break; |
| 123 | } |
| 124 | } |
| 125 | len += 2; |
| 126 | |
| 127 | if (!stralloc_ready(sa,len)) |
| 128 | return -1; |
| 129 | |
| 130 | s = sa->s; |
| 131 | lineb = s; |
| 132 | linee = 0; |
| 133 | |
| 134 | lasttype = 0; |
| 135 | for (i = 0;i < ta->len;++i) |
| 136 | { |
| 137 | t = ta->t + i; |
| 138 | newtype = t->type; |
| 139 | if (needspace(lasttype,newtype)) |
| 140 | *s++ = ' '; |
| 141 | lasttype = newtype; |
| 142 | switch(newtype) |
| 143 | { |
| 144 | case TOKEN822_COMMA: |
| 145 | *s++ = ','; |
| 146 | #define NSUW \ |
| 147 | s[0] = '\n'; s[1] = ' '; \ |
| 148 | if (linee && (!linelen || (s - lineb <= linelen))) \ |
| 149 | { while (linee < s) { linee[0] = linee[2]; ++linee; } linee -= 2; } \ |
| 150 | else { if (linee) lineb = linee + 1; linee = s; s += 2; } |
| 151 | NSUW |
| 152 | break; |
| 153 | case TOKEN822_AT: *s++ = '@'; break; |
| 154 | case TOKEN822_DOT: *s++ = '.'; break; |
| 155 | case TOKEN822_LEFT: *s++ = '<'; break; |
| 156 | case TOKEN822_RIGHT: *s++ = '>'; break; |
| 157 | case TOKEN822_SEMI: *s++ = ';'; break; |
| 158 | case TOKEN822_COLON: *s++ = ':'; break; |
| 159 | case TOKEN822_ATOM: case TOKEN822_QUOTE: case TOKEN822_LITERAL: case TOKEN822_COMMENT: |
| 160 | if (t->type == TOKEN822_QUOTE) *s++ = '"'; |
| 161 | if (t->type == TOKEN822_LITERAL) *s++ = '['; |
| 162 | if (t->type == TOKEN822_COMMENT) *s++ = '('; |
| 163 | for (j = 0;j < t->slen;++j) |
| 164 | switch(ch = t->s[j]) |
| 165 | { |
| 166 | case '"': case '[': case ']': case '(': case ')': |
| 167 | case '\\': case '\r': case '\n': *s++ = '\\'; |
| 168 | default: *s++ = ch; |
| 169 | } |
| 170 | if (t->type == TOKEN822_QUOTE) *s++ = '"'; |
| 171 | if (t->type == TOKEN822_LITERAL) *s++ = ']'; |
| 172 | if (t->type == TOKEN822_COMMENT) *s++ = ')'; |
| 173 | break; |
| 174 | } |
| 175 | } |
| 176 | NSUW |
| 177 | --s; |
| 178 | sa->len = s - sa->s; |
| 179 | return 1; |
| 180 | } |
| 181 | |
| 182 | int token822_unquote(sa,ta) |
| 183 | stralloc *sa; |
| 184 | token822_alloc *ta; |
| 185 | { |
| 186 | struct token822 *t; |
| 187 | int len; |
| 188 | int i; |
| 189 | int j; |
| 190 | char *s; |
| 191 | |
| 192 | len = 0; |
| 193 | for (i = 0;i < ta->len;++i) |
| 194 | { |
| 195 | t = ta->t + i; |
| 196 | switch(t->type) |
| 197 | { |
| 198 | case TOKEN822_COMMA: case TOKEN822_AT: case TOKEN822_DOT: case TOKEN822_LEFT: |
| 199 | case TOKEN822_RIGHT: case TOKEN822_SEMI: case TOKEN822_COLON: |
| 200 | ++len; break; |
| 201 | case TOKEN822_LITERAL: |
| 202 | len += 2; |
| 203 | case TOKEN822_ATOM: case TOKEN822_QUOTE: |
| 204 | len += t->slen; |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | if (!stralloc_ready(sa,len)) |
| 209 | return -1; |
| 210 | |
| 211 | s = sa->s; |
| 212 | |
| 213 | for (i = 0;i < ta->len;++i) |
| 214 | { |
| 215 | t = ta->t + i; |
| 216 | switch(t->type) |
| 217 | { |
| 218 | case TOKEN822_COMMA: *s++ = ','; break; |
| 219 | case TOKEN822_AT: *s++ = '@'; break; |
| 220 | case TOKEN822_DOT: *s++ = '.'; break; |
| 221 | case TOKEN822_LEFT: *s++ = '<'; break; |
| 222 | case TOKEN822_RIGHT: *s++ = '>'; break; |
| 223 | case TOKEN822_SEMI: *s++ = ';'; break; |
| 224 | case TOKEN822_COLON: *s++ = ':'; break; |
| 225 | case TOKEN822_ATOM: case TOKEN822_QUOTE: case TOKEN822_LITERAL: |
| 226 | if (t->type == TOKEN822_LITERAL) *s++ = '['; |
| 227 | for (j = 0;j < t->slen;++j) |
| 228 | *s++ = t->s[j]; |
| 229 | if (t->type == TOKEN822_LITERAL) *s++ = ']'; |
| 230 | break; |
| 231 | case TOKEN822_COMMENT: break; |
| 232 | } |
| 233 | } |
| 234 | sa->len = s - sa->s; |
| 235 | return 1; |
| 236 | } |
| 237 | |
| 238 | int token822_parse(ta,sa,buf) |
| 239 | token822_alloc *ta; |
| 240 | stralloc *sa; |
| 241 | stralloc *buf; |
| 242 | { |
| 243 | int i; |
| 244 | int salen; |
| 245 | int level; |
| 246 | struct token822 *t; |
| 247 | int numtoks; |
| 248 | int numchars; |
| 249 | char *cbuf; |
| 250 | |
| 251 | salen = sa->len; |
| 252 | |
| 253 | numchars = 0; |
| 254 | numtoks = 0; |
| 255 | for (i = 0;i < salen;++i) |
| 256 | switch(sa->s[i]) |
| 257 | { |
| 258 | case '.': case ',': case '@': case '<': case '>': case ':': case ';': |
| 259 | ++numtoks; break; |
| 260 | case ' ': case '\t': case '\r': case '\n': break; |
| 261 | case ')': case ']': return 0; |
| 262 | /* other control chars and non-ASCII chars are also bad, in theory */ |
| 263 | case '(': |
| 264 | level = 1; |
| 265 | while (level) |
| 266 | { |
| 267 | if (++i >= salen) return 0; |
| 268 | switch(sa->s[i]) |
| 269 | { |
| 270 | case '(': ++level; break; |
| 271 | case ')': --level; break; |
| 272 | case '\\': if (++i >= salen) return 0; |
| 273 | default: ++numchars; |
| 274 | } |
| 275 | } |
| 276 | ++numtoks; |
| 277 | break; |
| 278 | case '"': |
| 279 | level = 1; |
| 280 | while (level) |
| 281 | { |
| 282 | if (++i >= salen) return 0; |
| 283 | switch(sa->s[i]) |
| 284 | { |
| 285 | case '"': --level; break; |
| 286 | case '\\': if (++i >= salen) return 0; |
| 287 | default: ++numchars; |
| 288 | } |
| 289 | } |
| 290 | ++numtoks; |
| 291 | break; |
| 292 | case '[': |
| 293 | level = 1; |
| 294 | while (level) |
| 295 | { |
| 296 | if (++i >= salen) return 0; |
| 297 | switch(sa->s[i]) |
| 298 | { |
| 299 | case ']': --level; break; |
| 300 | case '\\': if (++i >= salen) return 0; |
| 301 | default: ++numchars; |
| 302 | } |
| 303 | } |
| 304 | ++numtoks; |
| 305 | break; |
| 306 | default: |
| 307 | do |
| 308 | { |
| 309 | if (sa->s[i] == '\\') if (++i >= salen) break; |
| 310 | ++numchars; |
| 311 | if (++i >= salen) |
| 312 | break; |
| 313 | } |
| 314 | while (atomok(sa->s[i])); |
| 315 | --i; |
| 316 | ++numtoks; |
| 317 | } |
| 318 | |
| 319 | if (!token822_ready(ta,numtoks)) |
| 320 | return -1; |
| 321 | if (!stralloc_ready(buf,numchars)) |
| 322 | return -1; |
| 323 | cbuf = buf->s; |
| 324 | ta->len = numtoks; |
| 325 | |
| 326 | t = ta->t; |
| 327 | for (i = 0;i < salen;++i) |
| 328 | switch(sa->s[i]) |
| 329 | { |
| 330 | case '.': t->type = TOKEN822_DOT; ++t; break; |
| 331 | case ',': t->type = TOKEN822_COMMA; ++t; break; |
| 332 | case '@': t->type = TOKEN822_AT; ++t; break; |
| 333 | case '<': t->type = TOKEN822_LEFT; ++t; break; |
| 334 | case '>': t->type = TOKEN822_RIGHT; ++t; break; |
| 335 | case ':': t->type = TOKEN822_COLON; ++t; break; |
| 336 | case ';': t->type = TOKEN822_SEMI; ++t; break; |
| 337 | case ' ': case '\t': case '\r': case '\n': break; |
| 338 | case '(': |
| 339 | t->type = TOKEN822_COMMENT; t->s = cbuf; t->slen = 0; |
| 340 | level = 1; |
| 341 | while (level) |
| 342 | { |
| 343 | ++i; /* assert: < salen */ |
| 344 | switch(sa->s[i]) |
| 345 | { |
| 346 | case '(': ++level; break; |
| 347 | case ')': --level; break; |
| 348 | case '\\': ++i; /* assert: < salen */ |
| 349 | default: *cbuf++ = sa->s[i]; ++t->slen; |
| 350 | } |
| 351 | } |
| 352 | ++t; |
| 353 | break; |
| 354 | case '"': |
| 355 | t->type = TOKEN822_QUOTE; t->s = cbuf; t->slen = 0; |
| 356 | level = 1; |
| 357 | while (level) |
| 358 | { |
| 359 | ++i; /* assert: < salen */ |
| 360 | switch(sa->s[i]) |
| 361 | { |
| 362 | case '"': --level; break; |
| 363 | case '\\': ++i; /* assert: < salen */ |
| 364 | default: *cbuf++ = sa->s[i]; ++t->slen; |
| 365 | } |
| 366 | } |
| 367 | ++t; |
| 368 | break; |
| 369 | case '[': |
| 370 | t->type = TOKEN822_LITERAL; t->s = cbuf; t->slen = 0; |
| 371 | level = 1; |
| 372 | while (level) |
| 373 | { |
| 374 | ++i; /* assert: < salen */ |
| 375 | switch(sa->s[i]) |
| 376 | { |
| 377 | case ']': --level; break; |
| 378 | case '\\': ++i; /* assert: < salen */ |
| 379 | default: *cbuf++ = sa->s[i]; ++t->slen; |
| 380 | } |
| 381 | } |
| 382 | ++t; |
| 383 | break; |
| 384 | default: |
| 385 | t->type = TOKEN822_ATOM; t->s = cbuf; t->slen = 0; |
| 386 | do |
| 387 | { |
| 388 | if (sa->s[i] == '\\') if (++i >= salen) break; |
| 389 | *cbuf++ = sa->s[i]; ++t->slen; |
| 390 | if (++i >= salen) |
| 391 | break; |
| 392 | } |
| 393 | while (atomok(sa->s[i])); |
| 394 | atomcheck(t); |
| 395 | --i; |
| 396 | ++t; |
| 397 | } |
| 398 | return 1; |
| 399 | } |
| 400 | |
| 401 | static int gotaddr(taout,taaddr,callback) |
| 402 | token822_alloc *taout; |
| 403 | token822_alloc *taaddr; |
| 404 | int (*callback)(); |
| 405 | { |
| 406 | int i; |
| 407 | |
| 408 | if (callback(taaddr) != 1) |
| 409 | return 0; |
| 410 | |
| 411 | if (!token822_readyplus(taout,taaddr->len)) |
| 412 | return 0; |
| 413 | |
| 414 | for (i = 0;i < taaddr->len;++i) |
| 415 | taout->t[taout->len++] = taaddr->t[i]; |
| 416 | |
| 417 | taaddr->len = 0; |
| 418 | return 1; |
| 419 | } |
| 420 | |
| 421 | int token822_addrlist(taout,taaddr,ta,callback) |
| 422 | token822_alloc *taout; |
| 423 | token822_alloc *taaddr; |
| 424 | token822_alloc *ta; |
| 425 | int (*callback)(); |
| 426 | { |
| 427 | struct token822 *t; |
| 428 | struct token822 *beginning; |
| 429 | int ingroup; |
| 430 | int wordok; |
| 431 | |
| 432 | taout->len = 0; |
| 433 | taaddr->len = 0; |
| 434 | |
| 435 | if (!token822_readyplus(taout,1)) return -1; |
| 436 | if (!token822_readyplus(taaddr,1)) return -1; |
| 437 | |
| 438 | ingroup = 0; |
| 439 | wordok = 1; |
| 440 | |
| 441 | beginning = ta->t + 2; |
| 442 | t = ta->t + ta->len - 1; |
| 443 | |
| 444 | /* rfc 822 address lists are easy to parse from right to left */ |
| 445 | |
| 446 | #define FLUSH if (taaddr->len) if (!gotaddr(taout,taaddr,callback)) return -1; |
| 447 | #define FLUSHCOMMA if (taaddr->len) { \ |
| 448 | if (!gotaddr(taout,taaddr,callback)) return -1; \ |
| 449 | if (!token822_append(taout,&comma)) return -1; } |
| 450 | #define ADDRLEFT if (!token822_append(taaddr,t--)) return -1; |
| 451 | #define OUTLEFT if (!token822_append(taout,t--)) return -1; |
| 452 | |
| 453 | while (t >= beginning) |
| 454 | { |
| 455 | switch(t->type) |
| 456 | { |
| 457 | case TOKEN822_SEMI: |
| 458 | FLUSHCOMMA |
| 459 | if (ingroup) return 0; |
| 460 | ingroup = 1; |
| 461 | wordok = 1; |
| 462 | break; |
| 463 | case TOKEN822_COLON: |
| 464 | FLUSH |
| 465 | if (!ingroup) return 0; |
| 466 | ingroup = 0; |
| 467 | while ((t >= beginning) && (t->type != TOKEN822_COMMA)) |
| 468 | OUTLEFT |
| 469 | if (t >= beginning) |
| 470 | OUTLEFT |
| 471 | wordok = 1; |
| 472 | continue; |
| 473 | case TOKEN822_RIGHT: |
| 474 | FLUSHCOMMA |
| 475 | OUTLEFT |
| 476 | while ((t >= beginning) && (t->type != TOKEN822_LEFT)) |
| 477 | ADDRLEFT |
| 478 | /* important to use address here even if it's empty: <> */ |
| 479 | if (!gotaddr(taout,taaddr,callback)) return -1; |
| 480 | if (t < beginning) return 0; |
| 481 | OUTLEFT |
| 482 | while ((t >= beginning) && ((t->type == TOKEN822_COMMENT) || (t->type == TOKEN822_ATOM) || (t->type == TOKEN822_QUOTE) || (t->type == TOKEN822_AT) || (t->type == TOKEN822_DOT))) |
| 483 | OUTLEFT |
| 484 | wordok = 0; |
| 485 | continue; |
| 486 | case TOKEN822_ATOM: case TOKEN822_QUOTE: case TOKEN822_LITERAL: |
| 487 | if (!wordok) |
| 488 | FLUSHCOMMA |
| 489 | wordok = 0; |
| 490 | ADDRLEFT |
| 491 | continue; |
| 492 | case TOKEN822_COMMENT: |
| 493 | /* comment is lexically a space; shouldn't affect wordok */ |
| 494 | break; |
| 495 | case TOKEN822_COMMA: |
| 496 | FLUSH |
| 497 | wordok = 1; |
| 498 | break; |
| 499 | default: |
| 500 | wordok = 1; |
| 501 | ADDRLEFT |
| 502 | continue; |
| 503 | } |
| 504 | OUTLEFT |
| 505 | } |
| 506 | FLUSH |
| 507 | ++t; |
| 508 | while (t > ta->t) |
| 509 | if (!token822_append(taout,--t)) return -1; |
| 510 | |
| 511 | token822_reverse(taout); |
| 512 | return 1; |
| 513 | } |