| 398 | |
| 399 | |
| 400 | static void read_string(LexState *ls, int del, SemInfo *seminfo) { |
| 401 | save_and_next(ls); /* keep delimiter (for error messages) */ |
| 402 | while (ls->current != del) { |
| 403 | switch (ls->current) { |
| 404 | case EOZ: |
| 405 | lexerror(ls, "unfinished string", TK_EOS); |
| 406 | break; /* to avoid warnings */ |
| 407 | case '\n': |
| 408 | case '\r': |
| 409 | lexerror(ls, "unfinished string", TK_STRING); |
| 410 | break; /* to avoid warnings */ |
| 411 | case '\\': { /* escape sequences */ |
| 412 | int c; /* final character to be saved */ |
| 413 | save_and_next(ls); /* keep '\\' for error messages */ |
| 414 | switch (ls->current) { |
| 415 | case 'a': c = '\a'; goto read_save; |
| 416 | case 'b': c = '\b'; goto read_save; |
| 417 | case 'f': c = '\f'; goto read_save; |
| 418 | case 'n': c = '\n'; goto read_save; |
| 419 | case 'r': c = '\r'; goto read_save; |
| 420 | case 't': c = '\t'; goto read_save; |
| 421 | case 'v': c = '\v'; goto read_save; |
| 422 | case 'x': c = readhexaesc(ls); goto read_save; |
| 423 | case 'u': utf8esc(ls); goto no_save; |
| 424 | case '\n': case '\r': |
| 425 | inclinenumber(ls); c = '\n'; goto only_save; |
| 426 | case '\\': case '\"': case '\'': |
| 427 | c = ls->current; goto read_save; |
| 428 | case EOZ: goto no_save; /* will raise an error next loop */ |
| 429 | case 'z': { /* zap following span of spaces */ |
| 430 | luaZ_buffremove(ls->buff, 1); /* remove '\\' */ |
| 431 | next(ls); /* skip the 'z' */ |
| 432 | while (lisspace(ls->current)) { |
| 433 | if (currIsNewline(ls)) inclinenumber(ls); |
| 434 | else next(ls); |
| 435 | } |
| 436 | goto no_save; |
| 437 | } |
| 438 | default: { |
| 439 | esccheck(ls, lisdigit(ls->current), "invalid escape sequence"); |
| 440 | c = readdecesc(ls); /* digital escape '\ddd' */ |
| 441 | goto only_save; |
| 442 | } |
| 443 | } |
| 444 | read_save: |
| 445 | next(ls); |
| 446 | /* go through */ |
| 447 | only_save: |
| 448 | luaZ_buffremove(ls->buff, 1); /* remove '\\' */ |
| 449 | save(ls, c); |
| 450 | /* go through */ |
| 451 | no_save: break; |
| 452 | } |
| 453 | default: |
| 454 | save_and_next(ls); |
| 455 | } |
| 456 | } |
| 457 | save_and_next(ls); /* skip delimiter */ |
no test coverage detected