diff options
Diffstat (limited to 'src/serd_internal.h')
| -rw-r--r-- | src/serd_internal.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/serd_internal.h b/src/serd_internal.h index 481b56fa..267ef6f6 100644 --- a/src/serd_internal.h +++ b/src/serd_internal.h @@ -356,6 +356,30 @@ utf8_num_bytes(const uint8_t c) #endif } +/// Return the code point of a UTF-8 character with known length +static inline uint32_t +parse_counted_utf8_char(const uint8_t* utf8, size_t size) +{ + uint32_t c = utf8[0] & ((1 << (8 - size)) - 1); + for (size_t i = 1; i < size; ++i) { + const uint8_t in = utf8[i] & 0x3F; + c = (c << 6) | in; + } + return c; +} + +/// Parse a UTF-8 character, set *size to the length, and return the code point +static inline uint32_t +parse_utf8_char(const uint8_t* utf8, size_t* size) +{ + switch (*size = utf8_num_bytes(utf8[0])) { + case 1: case 2: case 3: case 4: + return parse_counted_utf8_char(utf8, *size); + default: + return *size = 0; + } +} + /* URI utilities */ static inline bool |