| … | |
… | |
| 1023 | if (*dec->cur == '}') |
1023 | if (*dec->cur == '}') |
| 1024 | ++dec->cur; |
1024 | ++dec->cur; |
| 1025 | else |
1025 | else |
| 1026 | for (;;) |
1026 | for (;;) |
| 1027 | { |
1027 | { |
| 1028 | SV *key, *value; |
|
|
| 1029 | |
|
|
| 1030 | decode_ws (dec); EXPECT_CH ('"'); |
1028 | decode_ws (dec); EXPECT_CH ('"'); |
| 1031 | |
1029 | |
| 1032 | key = decode_str (dec); |
1030 | // heuristic: assume that |
| 1033 | if (!key) |
1031 | // a) decode_str + hv_store_ent are abysmally slow |
| 1034 | goto fail; |
1032 | // b) most hash keys are short, simple ascii text |
|
|
1033 | // so try to "fast-match" such strings to avoid |
|
|
1034 | // the overhead of hv_store_ent. |
|
|
1035 | { |
|
|
1036 | SV *value; |
|
|
1037 | char *p = dec->cur; |
|
|
1038 | char *e = p + 24; // only try up to 24 bytes |
| 1035 | |
1039 | |
| 1036 | decode_ws (dec); EXPECT_CH (':'); |
1040 | for (;;) |
| 1037 | |
|
|
| 1038 | value = decode_sv (dec); |
|
|
| 1039 | if (!value) |
|
|
| 1040 | { |
1041 | { |
|
|
1042 | if (p == e || *p < 0x20 || *p >= 0x80 || *p == '\\') |
|
|
1043 | { |
|
|
1044 | // slow path, back up and use decode_str |
|
|
1045 | SV *key = decode_str (dec); |
|
|
1046 | if (!key) |
|
|
1047 | goto fail; |
|
|
1048 | |
|
|
1049 | decode_ws (dec); EXPECT_CH (':'); |
|
|
1050 | |
|
|
1051 | value = decode_sv (dec); |
|
|
1052 | if (!value) |
|
|
1053 | { |
|
|
1054 | SvREFCNT_dec (key); |
|
|
1055 | goto fail; |
|
|
1056 | } |
|
|
1057 | |
|
|
1058 | hv_store_ent (hv, key, value, 0); |
| 1041 | SvREFCNT_dec (key); |
1059 | SvREFCNT_dec (key); |
|
|
1060 | |
|
|
1061 | break; |
|
|
1062 | } |
|
|
1063 | else if (*p == '"') |
|
|
1064 | { |
|
|
1065 | // fast path, got a simple key |
|
|
1066 | char *key = dec->cur; |
|
|
1067 | int len = p - key; |
|
|
1068 | dec->cur = p + 1; |
|
|
1069 | |
|
|
1070 | decode_ws (dec); EXPECT_CH (':'); |
|
|
1071 | |
|
|
1072 | value = decode_sv (dec); |
|
|
1073 | if (!value) |
| 1042 | goto fail; |
1074 | goto fail; |
|
|
1075 | |
|
|
1076 | hv_store (hv, key, len, value, 0); |
|
|
1077 | |
|
|
1078 | break; |
|
|
1079 | } |
|
|
1080 | |
|
|
1081 | ++p; |
| 1043 | } |
1082 | } |
| 1044 | |
1083 | } |
| 1045 | hv_store_ent (hv, key, value, 0); |
|
|
| 1046 | SvREFCNT_dec (key); |
|
|
| 1047 | |
1084 | |
| 1048 | decode_ws (dec); |
1085 | decode_ws (dec); |
| 1049 | |
1086 | |
| 1050 | if (*dec->cur == '}') |
1087 | if (*dec->cur == '}') |
| 1051 | { |
1088 | { |
