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utf8.h
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utf8.h
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#ifndef UTF8_H
#define UTF8_H
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include <utf8proc.h>
typedef struct {
bool ignore_bom;
bool bom_seen;
uint8_t pend_buf[3];
int pend_pos;
} utf8_dec_t;
utf8proc_ssize_t utf8_whatwg_decode(
utf8_dec_t *dec, const uint8_t *src, size_t len,
char *out, bool fatal, bool stream
);
size_t utf8_strlen(const char *str, size_t byte_len);
size_t utf16_strlen(const char *str, size_t byte_len);
size_t byte_offset_to_utf16(const char *str, size_t byte_off);
size_t utf8_char_len_at(const char *str, size_t byte_len, size_t pos);
char *utf8_json_quote(const char *str, size_t byte_len, size_t *out_len);
int utf16_index_to_byte_offset(
const char *str,
size_t byte_len,
size_t utf16_idx,
size_t *out_char_bytes
);
int utf16_range_to_byte_range(
const char *str,
size_t byte_len,
size_t utf16_start,
size_t utf16_end,
size_t *byte_start,
size_t *byte_end
);
uint32_t utf16_code_unit_at(const char *str, size_t byte_len, size_t utf16_idx);
uint32_t utf16_codepoint_at(const char *str, size_t byte_len, size_t utf16_idx);
static inline int utf8_sequence_length(unsigned char first_byte) {
if ((first_byte & 0x80) == 0) return 1;
if ((first_byte & 0xE0) == 0xC0) return 2;
if ((first_byte & 0xF0) == 0xE0) return 3;
if ((first_byte & 0xF8) == 0xF0) return 4;
return -1;
}
static inline int utf8_encode(uint32_t cp, char *out) {
return (int)
utf8proc_encode_char((utf8proc_int32_t)cp,
(utf8proc_uint8_t *)out);
}
static inline utf8proc_ssize_t utf8_next(
const utf8proc_uint8_t *p,
utf8proc_ssize_t len,
utf8proc_int32_t *cp
) {
utf8proc_ssize_t n = utf8proc_iterate(p, len, cp);
return n > 0 ? n : 1;
}
#endif

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utf8.h (1 KB)

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