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unibreakdef.h
Go to the documentation of this file.
/* vim: set expandtab tabstop=4 softtabstop=4 shiftwidth=4: */
/*
* Break processing in a Unicode sequence. Designed to be used in a
* generic text renderer.
*
* Copyright (C) 2015-2024 Wu Yongwei <wuyongwei at gmail dot com>
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the author be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute
* it freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must
* not claim that you wrote the original software. If you use this
* software in a product, an acknowledgement in the product
* documentation would be appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must
* not be misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source
* distribution.
*/
#ifndef UNIBREAKDEF_H
#define UNIBREAKDEF_H
#if defined(_MSC_VER) && _MSC_VER < 1800
typedef int bool;
#define false 0
#define true 1
#else
#include <stdbool.h>
#endif
#include <stddef.h>
#include "unibreakbase.h"
#define ARRAY_LEN(x) (sizeof(x) / sizeof(x[0]))
#ifdef __cplusplus
extern "C" {
#endif
#define EOS 0xFFFFFFFF
typedef utf32_t (*get_next_char_t)(const void *, size_t, size_t *);
/* Function Prototype */
utf32_t ub_get_next_char_utf8(const utf8_t *s, size_t len, size_t *ip);
utf32_t ub_get_next_char_utf16(const utf16_t *s, size_t len, size_t *ip);
utf32_t ub_get_next_char_utf32(const utf32_t *s, size_t len, size_t *ip);
__inline const void *ub_bsearch(utf32_t ch, const void *ptr, size_t count,
size_t size)
{
int min = 0;
int max = count - 1;
int mid;
do
{
mid = (min + max) / 2;
const unsigned char *mid_ptr =
(const unsigned char *)ptr + mid * size;
utf32_t mid_start = *(const utf32_t *)mid_ptr;
utf32_t mid_end = *((const utf32_t *)mid_ptr + 1);
if (ch < mid_start)
{
max = mid - 1;
}
else if (ch > mid_end)
{
min = mid + 1;
}
else
{
return mid_ptr;
}
} while (min <= max);
return NULL;
}
#ifdef __cplusplus
}
#endif
#endif /* UNIBREAKDEF_H */
unibreakbase.h
Header file for common definitions in the libunibreak library.
utf16_t
unsigned short utf16_t
Type for UTF-16 data points.
Definition unibreakbase.h:48
utf32_t
unsigned int utf32_t
Type for UTF-32 data points.
Definition unibreakbase.h:49
utf8_t
unsigned char utf8_t
Type for UTF-8 data points.
Definition unibreakbase.h:47
ub_bsearch
__inline const void * ub_bsearch(utf32_t ch, const void *ptr, size_t count, size_t size)
Definition unibreakdef.h:72
ub_get_next_char_utf8
utf32_t ub_get_next_char_utf8(const utf8_t *s, size_t len, size_t *ip)
Gets the next Unicode character in a UTF-8 sequence.
Definition unibreakdef.c:50
get_next_char_t
utf32_t(* get_next_char_t)(const void *, size_t, size_t *)
Abstract function interface for ub_get_next_char_utf8, ub_get_next_char_utf16, and ub_get_next_char_u...
Definition unibreakdef.h:65
ub_get_next_char_utf32
utf32_t ub_get_next_char_utf32(const utf32_t *s, size_t len, size_t *ip)
Gets the next Unicode character in a UTF-32 sequence.
Definition unibreakdef.c:159
ub_get_next_char_utf16
utf32_t ub_get_next_char_utf16(const utf16_t *s, size_t len, size_t *ip)
Gets the next Unicode character in a UTF-16 sequence.
Definition unibreakdef.c:118