| 468 | |
| 469 | |
| 470 | const char* XMLUtil::GetCharacterRef( const char* p, char* value, int* length ) |
| 471 | { |
| 472 | // Presume an entity, and pull it out. |
| 473 | *length = 0; |
| 474 | |
| 475 | if ( *(p+1) == '#' && *(p+2) ) { |
| 476 | unsigned long ucs = 0; |
| 477 | TIXMLASSERT( sizeof( ucs ) >= 4 ); |
| 478 | ptrdiff_t delta = 0; |
| 479 | unsigned mult = 1; |
| 480 | static const char SEMICOLON = ';'; |
| 481 | |
| 482 | if ( *(p+2) == 'x' ) { |
| 483 | // Hexadecimal. |
| 484 | const char* q = p+3; |
| 485 | if ( !(*q) ) { |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | q = strchr( q, SEMICOLON ); |
| 490 | |
| 491 | if ( !q ) { |
| 492 | return 0; |
| 493 | } |
| 494 | TIXMLASSERT( *q == SEMICOLON ); |
| 495 | |
| 496 | delta = q-p; |
| 497 | --q; |
| 498 | |
| 499 | while ( *q != 'x' ) { |
| 500 | unsigned int digit = 0; |
| 501 | |
| 502 | if ( *q >= '0' && *q <= '9' ) { |
| 503 | digit = *q - '0'; |
| 504 | } |
| 505 | else if ( *q >= 'a' && *q <= 'f' ) { |
| 506 | digit = *q - 'a' + 10; |
| 507 | } |
| 508 | else if ( *q >= 'A' && *q <= 'F' ) { |
| 509 | digit = *q - 'A' + 10; |
| 510 | } |
| 511 | else { |
| 512 | return 0; |
| 513 | } |
| 514 | TIXMLASSERT( digit < 16 ); |
| 515 | TIXMLASSERT( digit == 0 || mult <= UINT_MAX / digit ); |
| 516 | const unsigned int digitScaled = mult * digit; |
| 517 | TIXMLASSERT( ucs <= ULONG_MAX - digitScaled ); |
| 518 | ucs += digitScaled; |
| 519 | TIXMLASSERT( mult <= UINT_MAX / 16 ); |
| 520 | mult *= 16; |
| 521 | --q; |
| 522 | } |
| 523 | } |
| 524 | else { |
| 525 | // Decimal. |
| 526 | const char* q = p+2; |
| 527 | if ( !(*q) ) { |
nothing calls this directly
no outgoing calls
no test coverage detected