108 lines
2.5 KiB
C
108 lines
2.5 KiB
C
/* Access functions for JISX0212 conversion.
|
|
Copyright (C) 1997 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 Library General Public License as
|
|
published by the Free Software Foundation; either version 2 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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _JIS0212_H
|
|
#define _JIS0212_H 1
|
|
|
|
#include <gconv.h>
|
|
#include <inttypes.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 wchar_t
|
|
jisx0212_to_ucs4 (char **s, size_t avail)
|
|
{
|
|
const struct jisx0212_idx *rp = jisx0212_to_ucs_idx;
|
|
unsigned char ch = *(*s);
|
|
unsigned char ch2;
|
|
wchar_t wch = L'\0';
|
|
int idx;
|
|
|
|
if (ch <= 0x6d || ch > 0xea)
|
|
return UNKNOWN_10646_CHAR;
|
|
|
|
if (avail < 2)
|
|
return 0;
|
|
|
|
ch2 = (*s)[1];
|
|
if (ch2 <= 0x20 || ch2 >= 0x7f)
|
|
return UNKNOWN_10646_CHAR;
|
|
|
|
idx = (ch - 0x21) * 94 + (ch2 - 0x21);
|
|
|
|
while (idx < rp->start)
|
|
++rp;
|
|
if (idx <= rp->end)
|
|
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
|
|
ucs4_to_jisx0212 (wchar_t wch, char **s, size_t avail)
|
|
{
|
|
const struct jisx0212_idx *rp = jisx0212_from_ucs_idx;
|
|
unsigned int ch = (unsigned int) wch;
|
|
const char *cp = NULL;
|
|
|
|
while (ch > rp->end)
|
|
++rp;
|
|
if (ch >= rp->start)
|
|
cp = jisx0212_from_ucs[rp->idx + ch - rp->start];
|
|
|
|
if (cp == NULL || cp[0] == '\0')
|
|
return UNKNOWN_10646_CHAR;
|
|
|
|
**s = cp[0];
|
|
if (cp[1] != '\0')
|
|
{
|
|
if (avail < 2)
|
|
return 0;
|
|
|
|
*++(*s) = cp[1];
|
|
}
|
|
++(*s);
|
|
|
|
return 2;
|
|
}
|
|
|
|
#endif /* jis0212.h */
|