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/* Access functions for JISX0212 conversion.
Copyright (C) 1997, 1998 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 <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 wchar_t
jisx0212_to_ucs4 (const char **s, size_t avail, unsigned char offset)
{
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 < offset || (ch - offset) <= 0x6d || (ch - offset) > 0xea)
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 - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
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[0] = cp[0];
if (cp[1] != '\0')
{
if (avail < 2)
return 0;
s[1] = cp[1];
}
return 2;
}
#endif /* jis0212.h */
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