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yap-6.3/include/YapUTF8.h
Vitor Santos Costa 18c74933af full dir
2018-06-18 12:16:36 +01:00

199 lines
4.8 KiB
C

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: YapMirror.c *
* Last rev: 5/2/88 *
* mods: *
* comments: Term conversion C implemented support *
* *
*************************************************************************/
#ifndef YAP_UTF8_H
#define YAP_UTF8_H
/**
* @file YapUTF8.h
*
* @brief uTF-8 codepoint translation and processing.
*
*/
#if SIZEOF_WCHAR_T == 2
#define CHARCODE_MAX 0xffff
#else
#define CHARCODE_MAX 0x10ffff
#endif
#include "utf8proc.h"
#ifndef INLINE_ONLY
#define INLINE_ONLY
#endif
INLINE_ONLY utf8proc_ssize_t get_utf8(const utf8proc_uint8_t *ptr,
size_t n,
utf8proc_int32_t *valp);
INLINE_ONLY utf8proc_ssize_t get_utf8(const utf8proc_uint8_t *ptr,
size_t n,
utf8proc_int32_t *valp) {
utf8proc_ssize_t rc = utf8proc_iterate(ptr, n, valp);
if (rc < 0) {
// LOCAL_ActiveError->errorNo = REPRESENTATION_ERROR_IN_CHARACTER_CODE;
}
return rc < 1 ? 1 : rc;
}
INLINE_ONLY utf8proc_ssize_t put_utf8(utf8proc_uint8_t *ptr,
utf8proc_int32_t val);
INLINE_ONLY utf8proc_ssize_t put_utf8(utf8proc_uint8_t *ptr,
utf8proc_int32_t val) {
utf8proc_ssize_t rc = utf8proc_encode_char(val, ptr);
if (rc < 0) {
// LOCAL_ActiveError->errorNo = REPRESENTATION_ERROR_CHARACTER_CODE;
}
return rc < 1 ? 1 : rc;
}
inline static const utf8proc_uint8_t *skip_utf8(const utf8proc_uint8_t *pt,
utf8proc_ssize_t n) {
utf8proc_ssize_t i;
utf8proc_int32_t b;
for (i = 0; i < n; i++) {
utf8proc_ssize_t l = utf8proc_iterate(pt, -1, &b);
if (b == 0)
return pt;
if (l < 0) {
// LOCAL_ActiveError->errorNo = REPRESENTATION_ERROR_CHARACTER_CODE;
} else {
pt += l;
}
}
return pt;
}
inline static utf8proc_ssize_t utf8_nof(utf8proc_int32_t val) {
return utf8proc_charwidth(val);
}
inline static utf8proc_ssize_t strlen_utf8(const utf8proc_uint8_t *pt) {
utf8proc_ssize_t rc = 0;
utf8proc_int32_t b;
while (true) {
utf8proc_ssize_t l = utf8proc_iterate(pt, -1, &b);
if (b == 0)
return rc;
else if (l > 0) {
pt += l;
rc++;
} else {
// LOCAL_ActiveError->errorNo = REPRESENTATION_ERROR_CHARACTER_CODE;
pt++;
}
}
return rc;
}
inline static utf8proc_ssize_t strlen_latin_utf8(const unsigned char *pt) {
utf8proc_ssize_t rc = 0;
utf8proc_uint8_t b;
while (true) {
utf8proc_ssize_t l = utf8proc_encode_char(*pt, &b);
if (l<0) {
pt++;
}
if (b == 0)
return rc;
pt++;
rc += l;
}
return rc;
}
inline static utf8proc_ssize_t strnlen_latin_utf8(const unsigned char *pt,
size_t max) {
utf8proc_ssize_t rc = 0;
utf8proc_uint8_t b;
while (true) {
utf8proc_ssize_t l = utf8proc_encode_char(*pt, &b);
if (b == 0)
return rc;
pt++;
if (l > 0)
rc += l;
if (--max == 0)
return rc;
}
return rc;
}
inline static utf8proc_ssize_t strlen_ucs2_utf8(const wchar_t *pt) {
utf8proc_ssize_t rc = 0;
utf8proc_uint8_t b;
while (true) {
utf8proc_ssize_t l = utf8proc_encode_char(*pt, &b);
if (b == 0)
return rc;
if (l < 0)
continue;
pt++;
rc += l;
}
return rc;
}
inline static utf8proc_ssize_t strnlen_ucs2_utf8(const wchar_t *pt,
size_t max) {
utf8proc_ssize_t rc = 0;
utf8proc_uint8_t b;
while (true) {
utf8proc_ssize_t l = utf8proc_encode_char(*pt, &b);
if (b == 0)
return rc;
pt++;
rc += l;
if (--max == 0)
return rc;
}
return rc;
}
inline static int cmpn_utf8(const utf8proc_uint8_t *pt1,
const utf8proc_uint8_t *pt2, utf8proc_ssize_t n) {
utf8proc_ssize_t i;
utf8proc_int32_t b;
for (i = 0; i < n; i++) {
if (pt1[0] != pt2[0])
return pt1[0] - pt2[0];
utf8proc_ssize_t l = utf8proc_iterate(pt1, -1, &b);
if (l == 2) {
if (pt1[1] != pt2[1])
return pt1[1] - pt2[1];
} else if (l == 3) {
if (pt1[2] != pt2[2])
return pt1[2] - pt2[2];
} else if (l == 4) {
if (pt1[3] != pt2[3])
return pt1[3] - pt2[3];
}
pt1 += l;
pt2 += l;
}
return 0;
}
// UTF16
#define LEAD_OFFSET ((uint32_t)0xD800 - (uint32_t)(0x10000 >> 10))
#define SURROGATE_OFFSET \
((uint32_t)0x10000 - (uint32_t)(0xD800 << 10) - (uint32_t)0xDC00)
#endif