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glibc/iconvdata/jis0212.h
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/* Access functions for JISX0212 conversion. | |
Copyright (C) 1997-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#ifndef _JIS0212_H | |
#define _JIS0212_H 1 | |
#include <assert.h> | |
#include <gconv.h> | |
#include <stdint.h> | |
/* Struct for table with indeces in mapping table. */ | |
struct jisx0212_idx | |
{ | |
uint16_t start; | |
uint16_t end; | |
uint16_t idx; | |
}; | |
/* Conversion table. */ | |
extern const struct jisx0212_idx __jisx0212_to_ucs_idx[]; | |
extern const uint16_t __jisx0212_to_ucs[]; | |
extern const struct jisx0212_idx __jisx0212_from_ucs_idx[]; | |
extern const char __jisx0212_from_ucs[][2]; | |
static inline uint32_t | |
__attribute ((always_inline)) | |
jisx0212_to_ucs4 (const unsigned char **s, size_t avail, unsigned char offset) | |
{ | |
const struct jisx0212_idx *rp = __jisx0212_to_ucs_idx; | |
unsigned char ch = *(*s); | |
unsigned char ch2; | |
uint32_t wch = 0; | |
int idx; | |
if (ch < offset || (ch - offset) < 0x22 || (ch - offset) > 0x6d) | |
return __UNKNOWN_10646_CHAR; | |
if (avail < 2) | |
return 0; | |
ch2 = (*s)[1]; | |
if (ch2 < offset || (ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f) | |
return __UNKNOWN_10646_CHAR; | |
idx = (ch - offset - 0x21) * 94 + (ch2 - offset - 0x21); | |
while (idx > rp->end) | |
++rp; | |
if (idx >= rp->start) | |
wch = __jisx0212_to_ucs[rp->idx + idx - rp->start]; | |
if (wch != L'\0') | |
(*s) += 2; | |
else | |
wch = __UNKNOWN_10646_CHAR; | |
return wch; | |
} | |
static inline size_t | |
__attribute ((always_inline)) | |
ucs4_to_jisx0212 (uint32_t wch, unsigned char *s, size_t avail) | |
{ | |
const struct jisx0212_idx *rp = __jisx0212_from_ucs_idx; | |
unsigned int ch = (unsigned int) wch; | |
const char *cp; | |
if (ch >= 0xffff) | |
return __UNKNOWN_10646_CHAR; | |
while (ch > rp->end) | |
++rp; | |
if (ch >= rp->start) | |
cp = __jisx0212_from_ucs[rp->idx + ch - rp->start]; | |
else | |
return __UNKNOWN_10646_CHAR; | |
if (cp[0] == '\0') | |
return __UNKNOWN_10646_CHAR; | |
s[0] = cp[0]; | |
assert (cp[1] != '\0'); | |
if (avail < 2) | |
return 0; | |
s[1] = cp[1]; | |
return 2; | |
} | |
#endif /* jis0212.h */ |