175 lines
4.7 KiB
C
175 lines
4.7 KiB
C
#include <stdlib.h>
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#include <string.h>
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#include <wchar.h>
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#include <locale.h>
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#include "mbctype.h"
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/* for some conversions, we use the __count field as a place to store a state value */
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#define __state __count
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extern char __lc_ctype[12];
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int
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_DEFUN (_wctomb_r, (r, s, wchar, state),
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struct _reent *r _AND
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char *s _AND
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wchar_t wchar _AND
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mbstate_t *state)
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{
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if (strlen (__lc_ctype) <= 1)
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{ /* fall-through */ }
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else if (!strcmp (__lc_ctype, "C-UTF-8"))
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{
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if (s == NULL)
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return 0; /* UTF-8 encoding is not state-dependent */
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if (wchar <= 0x7f)
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{
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*s = wchar;
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return 1;
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}
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else if (wchar >= 0x80 && wchar <= 0x7ff)
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{
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*s++ = 0xc0 | ((wchar & 0x7c0) >> 6);
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*s = 0x80 | (wchar & 0x3f);
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return 2;
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}
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else if (wchar >= 0x800 && wchar <= 0xffff)
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{
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/* UTF-16 surrogates -- must not occur in normal UCS-4 data */
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if (wchar >= 0xd800 && wchar <= 0xdfff)
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return -1;
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*s++ = 0xe0 | ((wchar & 0xf000) >> 12);
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*s++ = 0x80 | ((wchar & 0xfc0) >> 6);
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*s = 0x80 | (wchar & 0x3f);
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return 3;
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}
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else if (wchar >= 0x10000 && wchar <= 0x1fffff)
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{
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*s++ = 0xf0 | ((wchar & 0x1c0000) >> 18);
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*s++ = 0x80 | ((wchar & 0x3f000) >> 12);
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*s++ = 0x80 | ((wchar & 0xfc0) >> 6);
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*s = 0x80 | (wchar & 0x3f);
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return 4;
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}
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else if (wchar >= 0x200000 && wchar <= 0x3ffffff)
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{
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*s++ = 0xf8 | ((wchar & 0x3000000) >> 24);
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*s++ = 0x80 | ((wchar & 0xfc0000) >> 18);
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*s++ = 0x80 | ((wchar & 0x3f000) >> 12);
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*s++ = 0x80 | ((wchar & 0xfc0) >> 6);
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*s = 0x80 | (wchar & 0x3f);
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return 5;
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}
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else if (wchar >= 0x4000000 && wchar <= 0x7fffffff)
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{
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*s++ = 0xfc | ((wchar & 0x40000000) >> 30);
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*s++ = 0x80 | ((wchar & 0x3f000000) >> 24);
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*s++ = 0x80 | ((wchar & 0xfc0000) >> 18);
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*s++ = 0x80 | ((wchar & 0x3f000) >> 12);
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*s++ = 0x80 | ((wchar & 0xfc0) >> 6);
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*s = 0x80 | (wchar & 0x3f);
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return 6;
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}
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else
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return -1;
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}
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else if (!strcmp (__lc_ctype, "C-SJIS"))
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{
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unsigned char char2 = (unsigned char)wchar;
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unsigned char char1 = (unsigned char)(wchar >> 8);
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if (s == NULL)
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return 0; /* not state-dependent */
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if (char1 != 0x00)
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{
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/* first byte is non-zero..validate multi-byte char */
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if (_issjis1(char1) && _issjis2(char2))
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{
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*s++ = (char)char1;
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*s = (char)char2;
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return 2;
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}
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else
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return -1;
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}
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}
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else if (!strcmp (__lc_ctype, "C-EUCJP"))
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{
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unsigned char char2 = (unsigned char)wchar;
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unsigned char char1 = (unsigned char)(wchar >> 8);
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if (s == NULL)
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return 0; /* not state-dependent */
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if (char1 != 0x00)
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{
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/* first byte is non-zero..validate multi-byte char */
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if (_iseucjp (char1) && _iseucjp (char2))
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{
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*s++ = (char)char1;
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*s = (char)char2;
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return 2;
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}
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else
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return -1;
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}
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}
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else if (!strcmp (__lc_ctype, "C-JIS"))
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{
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int cnt = 0;
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unsigned char char2 = (unsigned char)wchar;
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unsigned char char1 = (unsigned char)(wchar >> 8);
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if (s == NULL)
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return 1; /* state-dependent */
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if (char1 != 0x00)
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{
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/* first byte is non-zero..validate multi-byte char */
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if (_isjis (char1) && _isjis (char2))
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{
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if (state->__state == 0)
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{
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/* must switch from ASCII to JIS state */
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state->__state = 1;
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*s++ = ESC_CHAR;
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*s++ = '$';
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*s++ = 'B';
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cnt = 3;
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}
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*s++ = (char)char1;
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*s = (char)char2;
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return cnt + 2;
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}
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else
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return -1;
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}
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else
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{
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if (state->__state != 0)
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{
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/* must switch from JIS to ASCII state */
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state->__state = 0;
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*s++ = ESC_CHAR;
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*s++ = '(';
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*s++ = 'B';
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cnt = 3;
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}
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*s = (char)char2;
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return cnt + 1;
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}
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}
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if (s == NULL)
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return 0;
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/* otherwise we are dealing with a single byte character */
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*s = (char) wchar;
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return 1;
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}
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