| 367 | |
| 368 | |
| 369 | static void read_string (LexState *ls, int del, SemInfo *seminfo) { |
| 370 | save_and_next(ls); /* keep delimiter (for error messages) */ |
| 371 | while (ls->current != del) { |
| 372 | switch (ls->current) { |
| 373 | case EOZ: |
| 374 | lexerror(ls, "unfinished string", TK_EOS); |
| 375 | break; /* to avoid warnings */ |
| 376 | case '\n': |
| 377 | case '\r': |
| 378 | lexerror(ls, "unfinished string", TK_STRING); |
| 379 | break; /* to avoid warnings */ |
| 380 | case '\\': { /* escape sequences */ |
| 381 | int c; /* final character to be saved */ |
| 382 | save_and_next(ls); /* keep '\\' for error messages */ |
| 383 | switch (ls->current) { |
| 384 | case 'a': c = '\a'; goto read_save; |
| 385 | case 'b': c = '\b'; goto read_save; |
| 386 | case 'f': c = '\f'; goto read_save; |
| 387 | case 'n': c = '\n'; goto read_save; |
| 388 | case 'r': c = '\r'; goto read_save; |
| 389 | case 't': c = '\t'; goto read_save; |
| 390 | case 'v': c = '\v'; goto read_save; |
| 391 | case 'x': c = readhexaesc(ls); goto read_save; |
| 392 | case 'u': utf8esc(ls); goto no_save; |
| 393 | case '\n': case '\r': |
| 394 | inclinenumber(ls); c = '\n'; goto only_save; |
| 395 | case '\\': case '\"': case '\'': |
| 396 | c = ls->current; goto read_save; |
| 397 | case EOZ: goto no_save; /* will raise an error next loop */ |
| 398 | case 'z': { /* zap following span of spaces */ |
| 399 | luaZ_buffremove(ls->buff, 1); /* remove '\\' */ |
| 400 | next(ls); /* skip the 'z' */ |
| 401 | while (lisspace(ls->current)) { |
| 402 | if (currIsNewline(ls)) inclinenumber(ls); |
| 403 | else next(ls); |
| 404 | } |
| 405 | goto no_save; |
| 406 | } |
| 407 | default: { |
| 408 | esccheck(ls, lisdigit(ls->current), "invalid escape sequence"); |
| 409 | c = readdecesc(ls); /* digital escape '\ddd' */ |
| 410 | goto only_save; |
| 411 | } |
| 412 | } |
| 413 | read_save: |
| 414 | next(ls); |
| 415 | /* go through */ |
| 416 | only_save: |
| 417 | luaZ_buffremove(ls->buff, 1); /* remove '\\' */ |
| 418 | save(ls, c); |
| 419 | /* go through */ |
| 420 | no_save: break; |
| 421 | } |
| 422 | default: |
| 423 | save_and_next(ls); |
| 424 | } |
| 425 | } |
| 426 | save_and_next(ls); /* skip delimiter */ |
no test coverage detected