diff options
Diffstat (limited to 'src/nxt_string.c')
| -rw-r--r-- | src/nxt_string.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/nxt_string.c b/src/nxt_string.c index 7d8c1ce3..4d3b3954 100644 --- a/src/nxt_string.c +++ b/src/nxt_string.c @@ -451,3 +451,59 @@ nxt_strvers_match(u_char *version, u_char *prefix, size_t length) return 0; } + + +u_char * +nxt_decode_uri(u_char *dst, u_char *src, size_t length) +{ + u_char *end, ch; + uint8_t d0, d1; + + static const uint8_t hex[256] + nxt_aligned(32) = + { + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 16, 16, 16, 16, 16, 16, + 16, 10, 11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 10, 11, 12, 13, 14, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, + }; + + nxt_prefetch(&hex['0']); + + end = src + length; + + while (src < end) { + ch = *src++; + + if (ch == '%') { + if (nxt_slow_path(end - src < 2)) { + return NULL; + } + + d0 = hex[*src++]; + d1 = hex[*src++]; + + if (nxt_slow_path((d0 | d1) >= 16)) { + return NULL; + } + + ch = (d0 << 4) + d1; + } + + *dst++ = ch; + } + + return dst; +} |