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#ifndef XM_UTF8_UTF8_H
#define XM_UTF8_UTF8_H
/* //////////////////////////////////////////////////////////////////////////////////////
* includes
*/
#include "prefix.h"
/* //////////////////////////////////////////////////////////////////////////////////////
* macros
*/
#define xm_utf8_iscont(c) (((c) & 0xC0) == 0x80)
#define xm_utf8_iscontp(p) xm_utf8_iscont(*(p))
#define XM_UTF8_MAXUNICODE 0x10FFFFu
#define XM_UTF8_MAXUTF 0x7FFFFFFFu
#define XM_UTF8_MSGInvalid "invalid UTF-8 code"
/* //////////////////////////////////////////////////////////////////////////////////////
* types
*/
typedef tb_uint32_t xm_utf8_int_t;
typedef tb_bool_t (*xm_utf8_codepoint_func_t)(xm_utf8_int_t code, tb_cpointer_t udata);
/* //////////////////////////////////////////////////////////////////////////////////////
* inline interfaces
*/
static __tb_inline__ tb_long_t xm_utf8_posrelat(tb_long_t pos, tb_size_t len) {
if (pos >= 0) {
return pos;
} else if (0u - (tb_size_t)pos > len) {
return 0;
} else {
return (tb_long_t)len + pos + 1;
}
}
/* //////////////////////////////////////////////////////////////////////////////////////
* interfaces
*/
tb_char_t const* xm_utf8_decode(tb_char_t const* s, xm_utf8_int_t* val, tb_bool_t strict);
tb_size_t xm_utf8_encode(tb_char_t* s, xm_utf8_int_t val);
tb_long_t xm_utf8_charpos(tb_char_t const* s, tb_size_t len, tb_long_t byte_pos);
tb_long_t xm_utf8_charwidth(xm_utf8_int_t val);
tb_long_t xm_utf8_strwidth(tb_char_t const* s, tb_size_t len);
/* //////////////////////////////////////////////////////////////////////////////////////
* implementation interfaces
*/
tb_long_t xm_utf8_len_impl(tb_char_t const* s, tb_size_t len, tb_long_t posi, tb_long_t posj, tb_bool_t strict, tb_size_t* errpos);
tb_long_t xm_utf8_offset_impl(tb_char_t const* s, tb_size_t len, tb_long_t n, tb_long_t posi);
tb_bool_t xm_utf8_codepoint_impl(tb_char_t const* s, tb_size_t len, tb_long_t posi, tb_long_t posj, tb_bool_t strict, xm_utf8_codepoint_func_t func, tb_cpointer_t udata);
tb_long_t xm_utf8_find_impl(tb_char_t const* s, tb_size_t len, tb_char_t const* sub, tb_size_t sublen, tb_long_t init, tb_long_t* pchar_end);
tb_long_t xm_utf8_lastof_impl(tb_char_t const* s, tb_size_t len, tb_char_t const* sub, tb_size_t sublen);
tb_long_t xm_utf8_byte_impl(tb_char_t const* s, tb_size_t len, tb_long_t i, tb_long_t j, xm_utf8_codepoint_func_t func, tb_cpointer_t udata);
tb_char_t const* xm_utf8_sub_impl(tb_char_t const* s, tb_size_t len, tb_long_t i, tb_long_t j, tb_size_t* psublen);
tb_char_t* xm_utf8_reverse_impl(tb_char_t const* s, tb_size_t len, tb_char_t* buf);
#endif
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