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/* Access functions for CNS 11643, plane 2 handling.
Copyright (C) 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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. */
#include <stdint.h>
/* Table for CNS 11643, plane 2 to UCS4 conversion. */
extern const uint16_t __cns11643l2_to_ucs4_tab[];
extern const uint16_t __cns11643l14_to_ucs4_tab[];
static inline uint32_t
cns11643_to_ucs4 (const char **s, size_t avail, unsigned char offset)
{
unsigned char ch = *(*s);
unsigned char ch2;
unsigned char ch3;
uint32_t result;
int idx;
if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x30)
return UNKNOWN_10646_CHAR;
if (avail < 3)
return 0;
ch2 = (*s)[1];
if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
return UNKNOWN_10646_CHAR;
ch3 = (*s)[2];
if ((ch3 - offset) <= 0x20 || (ch3 - offset) >= 0x7f)
return UNKNOWN_10646_CHAR;
idx = (ch2 - 0x21 - offset) * 94 + (ch3 - 0x21 - offset);
if ((ch - 0x21 - offset) == 1)
{
if (idx > 0x2196)
return UNKNOWN_10646_CHAR;
result = __cns11643l1_to_ucs4_tab[idx];
}
else if ((ch - 0x21 - offset) == 2)
{
if (idx > 0x1de1)
return UNKNOWN_10646_CHAR;
result = __cns11643l2_to_ucs4_tab[idx];
}
else if ((ch - 0x21 - offset) == 0xe)
{
if (idx > 0x19bd)
return UNKNOWN_10646_CHAR;
result = __cns11643l14_to_ucs4_tab[idx];
}
else
return UNKNOWN_10646_CHAR;
if (result != L'\0')
(*s) += 3;
else
result = UNKNOWN_10646_CHAR;
return result;
}
/* Tables for the UCS4 -> CNS conversion. */
extern const char __cns11643l1_from_ucs4_tab1[][2];
extern const char __cns11643l1_from_ucs4_tab2[][2];
extern const char __cns11643l1_from_ucs4_tab3[][2];
extern const char __cns11643l1_from_ucs4_tab4[][2];
extern const char __cns11643l1_from_ucs4_tab5[][2];
extern const char __cns11643l1_from_ucs4_tab6[][2];
extern const char __cns11643l1_from_ucs4_tab7[][2];
extern const char __cns11643l1_from_ucs4_tab8[][2];
extern const char __cns11643l1_from_ucs4_tab9[][2];
extern const char __cns11643l1_from_ucs4_tab10[][2];
extern const char __cns11643l1_from_ucs4_tab11[][2];
extern const char __cns11643l1_from_ucs4_tab12[][2];
extern const char __cns11643l1_from_ucs4_tab13[][2];
extern const char __cns11643l1_from_ucs4_tab14[][2];
extern const char __cns11643_from_ucs4_tab[][3];
static inline size_t
ucs4_to_cns11643 (uint32_t wch, char *s, size_t avail)
{
unsigned int ch = (unsigned int) wch;
char buf[2];
const char *cp = buf;
int needed = 2;
switch (ch)
{
case 0xa7 ... 0xf7:
cp = __cns11643l1_from_ucs4_tab1[ch - 0xa7];
break;
case 0x2c7 ... 0x2d9:
cp = __cns11643l1_from_ucs4_tab2[ch - 0x2c7];
break;
case 0x391 ... 0x3c9:
cp = __cns11643l1_from_ucs4_tab3[ch - 0x391];
break;
case 0x2013 ... 0x203e:
cp = __cns11643l1_from_ucs4_tab4[ch - 0x2013];
break;
case 0x2103:
cp = "\x22\x6a";
break;
case 0x2105:
cp = "\x22\x22";
break;
case 0x2109:
cp = "\x22\x6b";
break;
case 0x2160 ... 0x2169:
buf[0] = '\x24';
buf[1] = '\x2b' + (ch - 0x2160);
break;
case 0x2170 ... 0x2179:
buf[0] = '\x26';
buf[1] = '\x35' + (ch - 0x2170);
break;
case 0x2190 ... 0x2199:
cp = __cns11643l1_from_ucs4_tab5[ch - 0x2190];
break;
case 0x2215 ... 0x2267:
cp = __cns11643l1_from_ucs4_tab6[ch - 0x2215];
break;
case 0x22a5:
cp = "\x22\x47";
break;
case 0x22bf:
cp = "\x22\x4a";
break;
case 0x2400 ... 0x2421:
cp = __cns11643l1_from_ucs4_tab7[ch - 0x2400];
break;
case 0x2460 ... 0x247d:
cp = __cns11643l1_from_ucs4_tab8[ch - 0x2460];
break;
case 0x2500 ... 0x2642:
cp = __cns11643l1_from_ucs4_tab9[ch - 0x2500];
break;
case 0x3000 ... 0x3029:
cp = __cns11643l1_from_ucs4_tab10[ch - 0x3000];
break;
case 0x30fb:
cp = "\x21\x26";
break;
case 0x3105 ... 0x3129:
buf[0] = '\x25';
buf[1] = '\x26' + (ch - 0x3105);
break;
case 0x32a3:
cp = "\x22\x21";
break;
case 0x338e ... 0x33d5:
cp = __cns11643l1_from_ucs4_tab11[ch - 0x338e];
break;
case 0x4e00 ... 0x9f9c:
cp = __cns11643l1_from_ucs4_tab12[ch - 0x4e00];
if (cp[0] == '\0')
{
/* Let's try the other planes. */
needed = 3;
cp = __cns11643_from_ucs4_tab[ch - 0x4e00];
}
break;
case 0xfe30 ... 0xfe6b:
cp = __cns11643l1_from_ucs4_tab13[ch - 0xfe30];
break;
case 0xff01 ... 0xff5d:
cp = __cns11643l1_from_ucs4_tab14[ch - 0xff01];
break;
case 0xffe0:
cp = "\x22\x66";
break;
case 0xffe1:
cp = "\x22\x67";
break;
case 0xffe5:
cp = "\x22\x64";
break;
default:
return UNKNOWN_10646_CHAR;
}
if (cp[0] == '\0')
return UNKNOWN_10646_CHAR;
if (avail < needed)
return 0;
s[0] = cp[0];
s[1] = cp[1];
if (needed == 3)
s[2] = cp[2];
return needed;
}
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