… | |
… | |
155 | SvPV_renew (sv, SvCUR (sv) + 1); |
155 | SvPV_renew (sv, SvCUR (sv) + 1); |
156 | #endif |
156 | #endif |
157 | } |
157 | } |
158 | } |
158 | } |
159 | |
159 | |
|
|
160 | /* adds two STRLENs together, slow, and with paranoia */ |
|
|
161 | STRLEN |
|
|
162 | strlen_sum (STRLEN l1, STRLEN l2) |
|
|
163 | { |
|
|
164 | size_t sum = l1 + l2; |
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|
165 | |
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|
166 | if (sum < (size_t)l2 || sum != (size_t)(STRLEN)sum) |
|
|
167 | croak ("JSON::XS: string size overflow"); |
|
|
168 | |
|
|
169 | return sum; |
|
|
170 | } |
|
|
171 | |
|
|
172 | /* similar to SvGROW, but somewhat safer and guarantees exponential realloc strategy */ |
|
|
173 | static char * |
|
|
174 | json_sv_grow (SV *sv, size_t len1, size_t len2) |
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|
175 | { |
|
|
176 | len1 = strlen_sum (len1, len2); |
|
|
177 | len1 = strlen_sum (len1, len1 >> 1); |
|
|
178 | |
|
|
179 | if (len1 > 4096 - 24) |
|
|
180 | len1 = (len1 | 4095) - 24; |
|
|
181 | |
|
|
182 | return SvGROW (sv, len1); |
|
|
183 | } |
|
|
184 | |
160 | // decode an utf-8 character and return it, or (UV)-1 in |
185 | // decode an utf-8 character and return it, or (UV)-1 in |
161 | // case of an error. |
186 | // case of an error. |
162 | // we special-case "safe" characters from U+80 .. U+7FF, |
187 | // we special-case "safe" characters from U+80 .. U+7FF, |
163 | // but use the very good perl function to parse anything else. |
188 | // but use the very good perl function to parse anything else. |
164 | // note that we never call this function for a ascii codepoints |
189 | // note that we never call this function for a ascii codepoints |
… | |
… | |
365 | need (enc_t *enc, STRLEN len) |
390 | need (enc_t *enc, STRLEN len) |
366 | { |
391 | { |
367 | if (expect_false ((uintptr_t)(enc->end - enc->cur) < len)) |
392 | if (expect_false ((uintptr_t)(enc->end - enc->cur) < len)) |
368 | { |
393 | { |
369 | STRLEN cur = enc->cur - (char *)SvPVX (enc->sv); |
394 | STRLEN cur = enc->cur - (char *)SvPVX (enc->sv); |
370 | SvGROW (enc->sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
395 | char *buf = json_sv_grow (enc->sv, cur, len); |
371 | enc->cur = SvPVX (enc->sv) + cur; |
396 | enc->cur = buf + cur; |
372 | enc->end = SvPVX (enc->sv) + SvLEN (enc->sv) - 1; |
397 | enc->end = buf + SvLEN (enc->sv) - 1; |
373 | } |
398 | } |
374 | } |
399 | } |
375 | |
400 | |
376 | INLINE void |
401 | INLINE void |
377 | encode_ch (enc_t *enc, char ch) |
402 | encode_ch (enc_t *enc, char ch) |
… | |
… | |
393 | |
418 | |
394 | if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case |
419 | if (expect_true (ch >= 0x20 && ch < 0x80)) // most common case |
395 | { |
420 | { |
396 | if (expect_false (ch == '"')) // but with slow exceptions |
421 | if (expect_false (ch == '"')) // but with slow exceptions |
397 | { |
422 | { |
398 | need (enc, len += 1); |
423 | need (enc, len + 1); |
399 | *enc->cur++ = '\\'; |
424 | *enc->cur++ = '\\'; |
400 | *enc->cur++ = '"'; |
425 | *enc->cur++ = '"'; |
401 | } |
426 | } |
402 | else if (expect_false (ch == '\\')) |
427 | else if (expect_false (ch == '\\')) |
403 | { |
428 | { |
404 | need (enc, len += 1); |
429 | need (enc, len + 1); |
405 | *enc->cur++ = '\\'; |
430 | *enc->cur++ = '\\'; |
406 | *enc->cur++ = '\\'; |
431 | *enc->cur++ = '\\'; |
407 | } |
432 | } |
408 | else |
433 | else |
409 | *enc->cur++ = ch; |
434 | *enc->cur++ = ch; |
… | |
… | |
412 | } |
437 | } |
413 | else |
438 | else |
414 | { |
439 | { |
415 | switch (ch) |
440 | switch (ch) |
416 | { |
441 | { |
417 | case '\010': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break; |
442 | case '\010': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'b'; ++str; break; |
418 | case '\011': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break; |
443 | case '\011': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 't'; ++str; break; |
419 | case '\012': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break; |
444 | case '\012': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'n'; ++str; break; |
420 | case '\014': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break; |
445 | case '\014': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'f'; ++str; break; |
421 | case '\015': need (enc, len += 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break; |
446 | case '\015': need (enc, len + 1); *enc->cur++ = '\\'; *enc->cur++ = 'r'; ++str; break; |
422 | |
447 | |
423 | default: |
448 | default: |
424 | { |
449 | { |
425 | STRLEN clen; |
450 | STRLEN clen; |
426 | UV uch; |
451 | UV uch; |
… | |
… | |
442 | if (uch >= 0x10000UL) |
467 | if (uch >= 0x10000UL) |
443 | { |
468 | { |
444 | if (uch >= 0x110000UL) |
469 | if (uch >= 0x110000UL) |
445 | croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
470 | croak ("out of range codepoint (0x%lx) encountered, unrepresentable in JSON", (unsigned long)uch); |
446 | |
471 | |
447 | need (enc, len += 11); |
472 | need (enc, len + 11); |
448 | sprintf (enc->cur, "\\u%04x\\u%04x", |
473 | sprintf (enc->cur, "\\u%04x\\u%04x", |
449 | (int)((uch - 0x10000) / 0x400 + 0xD800), |
474 | (int)((uch - 0x10000) / 0x400 + 0xD800), |
450 | (int)((uch - 0x10000) % 0x400 + 0xDC00)); |
475 | (int)((uch - 0x10000) % 0x400 + 0xDC00)); |
451 | enc->cur += 12; |
476 | enc->cur += 12; |
452 | } |
477 | } |
453 | else |
478 | else |
454 | { |
479 | { |
455 | need (enc, len += 5); |
480 | need (enc, len + 5); |
456 | *enc->cur++ = '\\'; |
481 | *enc->cur++ = '\\'; |
457 | *enc->cur++ = 'u'; |
482 | *enc->cur++ = 'u'; |
458 | *enc->cur++ = PL_hexdigit [ uch >> 12 ]; |
483 | *enc->cur++ = PL_hexdigit [ uch >> 12 ]; |
459 | *enc->cur++ = PL_hexdigit [(uch >> 8) & 15]; |
484 | *enc->cur++ = PL_hexdigit [(uch >> 8) & 15]; |
460 | *enc->cur++ = PL_hexdigit [(uch >> 4) & 15]; |
485 | *enc->cur++ = PL_hexdigit [(uch >> 4) & 15]; |
… | |
… | |
468 | *enc->cur++ = uch; |
493 | *enc->cur++ = uch; |
469 | str += clen; |
494 | str += clen; |
470 | } |
495 | } |
471 | else if (is_utf8) |
496 | else if (is_utf8) |
472 | { |
497 | { |
473 | need (enc, len += clen); |
498 | need (enc, len + clen); |
474 | do |
499 | do |
475 | { |
500 | { |
476 | *enc->cur++ = *str++; |
501 | *enc->cur++ = *str++; |
477 | } |
502 | } |
478 | while (--clen); |
503 | while (--clen); |
479 | } |
504 | } |
480 | else |
505 | else |
481 | { |
506 | { |
482 | need (enc, len += UTF8_MAXBYTES - 1); // never more than 11 bytes needed |
507 | need (enc, len + UTF8_MAXBYTES - 1); // never more than 11 bytes needed |
483 | enc->cur = encode_utf8 (enc->cur, uch); |
508 | enc->cur = encode_utf8 (enc->cur, uch); |
484 | ++str; |
509 | ++str; |
485 | } |
510 | } |
486 | } |
511 | } |
487 | } |
512 | } |
… | |
… | |
1168 | |
1193 | |
1169 | if (sv) |
1194 | if (sv) |
1170 | { |
1195 | { |
1171 | STRLEN cur = SvCUR (sv); |
1196 | STRLEN cur = SvCUR (sv); |
1172 | |
1197 | |
1173 | if (SvLEN (sv) <= cur + len) |
1198 | if (SvLEN (sv) - cur <= len) |
1174 | SvGROW (sv, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
1199 | json_sv_grow (sv, cur, len); |
1175 | |
1200 | |
1176 | memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
1201 | memcpy (SvPVX (sv) + SvCUR (sv), buf, len); |
1177 | SvCUR_set (sv, SvCUR (sv) + len); |
1202 | SvCUR_set (sv, SvCUR (sv) + len); |
1178 | } |
1203 | } |
1179 | else |
1204 | else |
… | |
… | |
2159 | { |
2184 | { |
2160 | STRLEN len; |
2185 | STRLEN len; |
2161 | const char *str = SvPV (jsonstr, len); |
2186 | const char *str = SvPV (jsonstr, len); |
2162 | STRLEN cur = SvCUR (self->incr_text); |
2187 | STRLEN cur = SvCUR (self->incr_text); |
2163 | |
2188 | |
2164 | if (SvLEN (self->incr_text) <= cur + len) |
2189 | if (SvLEN (self->incr_text) - cur <= len) |
2165 | SvGROW (self->incr_text, cur + (len < (cur >> 2) ? cur >> 2 : len) + 1); |
2190 | json_sv_grow (self->incr_text, cur, len); |
2166 | |
2191 | |
2167 | Move (str, SvEND (self->incr_text), len, char); |
2192 | Move (str, SvEND (self->incr_text), len, char); |
2168 | SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len); |
2193 | SvCUR_set (self->incr_text, SvCUR (self->incr_text) + len); |
2169 | *SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there |
2194 | *SvEND (self->incr_text) = 0; // this should basically be a nop, too, but make sure it's there |
2170 | } |
2195 | } |