| 363 | } |
| 364 | |
| 365 | string unescapeString ( const string & input, bool * error, bool ) { |
| 366 | if ( error ) *error = false; |
| 367 | const char* str = input.c_str(); |
| 368 | const char* strEnd = str + input.length(); |
| 369 | string result; |
| 370 | result.reserve(input.size()); |
| 371 | for( ; str < strEnd; ++str ) { |
| 372 | if ( *str=='\\' ) { |
| 373 | ++str; |
| 374 | if ( str == strEnd ) { |
| 375 | if ( error ) *error = true; |
| 376 | return result; // invalid escape sequence |
| 377 | } |
| 378 | switch ( *str ) { |
| 379 | case '"': |
| 380 | case '/': |
| 381 | case '\\': result += *str; break; |
| 382 | case 'b': result += '\b'; break; |
| 383 | case 'f': result += '\f'; break; |
| 384 | case 'n': result += '\n'; break; |
| 385 | case 'r': result += '\r'; break; |
| 386 | case 't': result += '\t'; break; |
| 387 | case 'v': result += '\v'; break; |
| 388 | case '\n': break; // skip LF |
| 389 | case '{': result += '{'; break; |
| 390 | case '}': result += '}'; break; |
| 391 | case '\r': if ( str+1!=strEnd && str[1]=='\n' ) str++; break; // skip CR LF or just CR |
| 392 | case 'x': |
| 393 | case 'u': |
| 394 | case 'U': { |
| 395 | int symbols = (*str == 'x') ? 2 : (*str == 'u') ? 4 : 8; |
| 396 | uint32_t charCode = 0; |
| 397 | int x = 0; |
| 398 | str++; |
| 399 | for (; x < symbols && str != strEnd; x++, str++) { |
| 400 | int h = hexChar(*str); |
| 401 | if (h < 0) |
| 402 | break; |
| 403 | charCode = charCode * 16 + h; |
| 404 | } |
| 405 | str--; |
| 406 | |
| 407 | if (symbols == 2) { // \xNN |
| 408 | if (!x) { |
| 409 | if (error) *error = true; |
| 410 | } |
| 411 | else |
| 412 | result += char(charCode); |
| 413 | } |
| 414 | else if (x != symbols) { // \u \U requires exactly 4 or 8 hex symbols |
| 415 | if (error) *error = true; |
| 416 | } |
| 417 | else { |
| 418 | char buf[8]; |
| 419 | if (!encodeUtf8Char(charCode, buf) && error) |
| 420 | *error = true; |
| 421 | result += buf; |
| 422 | } |
no test coverage detected