377 lines
8.9 KiB
C
377 lines
8.9 KiB
C
#include <errno.h>
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#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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#include "local.h"
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int (*__wctomb) (struct _reent *, char *, wchar_t, const char *charset,
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mbstate_t *)
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#ifdef __CYGWIN__
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/* Cygwin starts up in UTF-8 mode. */
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= __utf8_wctomb;
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#else
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= __ascii_wctomb;
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#endif
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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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return __wctomb (r, s, _wchar, __locale_charset (), state);
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}
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int
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_DEFUN (__ascii_wctomb, (r, s, wchar, charset, 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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const char *charset _AND
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mbstate_t *state)
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{
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/* Avoids compiler warnings about comparisons that are always false
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due to limited range when sizeof(wchar_t) is 2 but sizeof(wint_t)
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is 4, as is the case on cygwin. */
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wint_t wchar = _wchar;
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if (s == NULL)
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return 0;
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#ifdef __CYGWIN__
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if ((size_t)wchar >= 0x80)
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#else
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if ((size_t)wchar >= 0x100)
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#endif
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{
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r->_errno = EILSEQ;
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return -1;
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}
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*s = (char) wchar;
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return 1;
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}
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#ifdef _MB_CAPABLE
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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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int
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_DEFUN (__utf8_wctomb, (r, s, wchar, charset, 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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const char *charset _AND
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mbstate_t *state)
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{
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wint_t wchar = _wchar;
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int ret = 0;
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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 (sizeof (wchar_t) == 2 && state->__count == -4
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&& (wchar < 0xdc00 || wchar >= 0xdfff))
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{
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/* There's a leftover lone high surrogate. Write out the CESU-8 value
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of the surrogate and proceed to convert the given character. Note
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to return extra 3 bytes. */
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wchar_t tmp;
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tmp = (state->__value.__wchb[0] << 16 | state->__value.__wchb[1] << 8)
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- 0x10000 >> 10 | 0xd80d;
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*s++ = 0xe0 | ((tmp & 0xf000) >> 12);
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*s++ = 0x80 | ((tmp & 0xfc0) >> 6);
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*s++ = 0x80 | (tmp & 0x3f);
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state->__count = 0;
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ret = 3;
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}
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if (wchar <= 0x7f)
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{
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*s = wchar;
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return ret + 1;
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}
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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 ret + 2;
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}
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if (wchar >= 0x800 && wchar <= 0xffff)
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{
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/* No UTF-16 surrogate handling in UCS-4 */
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if (sizeof (wchar_t) == 2 && wchar >= 0xd800 && wchar <= 0xdfff)
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{
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wint_t tmp;
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if (wchar <= 0xdbff)
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{
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/* First half of a surrogate pair. Store the state and
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return ret + 0. */
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tmp = ((wchar & 0x3ff) << 10) + 0x10000;
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state->__value.__wchb[0] = (tmp >> 16) & 0xff;
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state->__value.__wchb[1] = (tmp >> 8) & 0xff;
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state->__count = -4;
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*s = (0xf0 | ((tmp & 0x1c0000) >> 18));
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return ret;
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}
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if (state->__count == -4)
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{
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/* Second half of a surrogate pair. Reconstruct the full
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Unicode value and return the trailing three bytes of the
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UTF-8 character. */
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tmp = (state->__value.__wchb[0] << 16)
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| (state->__value.__wchb[1] << 8)
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| (wchar & 0x3ff);
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state->__count = 0;
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*s++ = 0xf0 | ((tmp & 0x1c0000) >> 18);
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*s++ = 0x80 | ((tmp & 0x3f000) >> 12);
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*s++ = 0x80 | ((tmp & 0xfc0) >> 6);
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*s = 0x80 | (tmp & 0x3f);
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return 4;
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}
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/* Otherwise translate into CESU-8 value. */
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}
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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 ret + 3;
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}
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if (wchar >= 0x10000 && wchar <= 0x10ffff)
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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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r->_errno = EILSEQ;
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return -1;
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}
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/* Cygwin defines its own doublebyte charset conversion functions
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because the underlying OS requires wchar_t == UTF-16. */
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#ifndef __CYGWIN__
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int
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_DEFUN (__sjis_wctomb, (r, s, wchar, charset, 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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const char *charset _AND
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mbstate_t *state)
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{
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wint_t wchar = _wchar;
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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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{
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r->_errno = EILSEQ;
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return -1;
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}
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}
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*s = (char) wchar;
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return 1;
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}
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int
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_DEFUN (__eucjp_wctomb, (r, s, wchar, charset, 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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const char *charset _AND
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mbstate_t *state)
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{
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wint_t wchar = _wchar;
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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 (_iseucjp1 (char1) && _iseucjp2 (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 if (_iseucjp2 (char1) && _iseucjp2 (char2 | 0x80))
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{
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*s++ = (char)0x8f;
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*s++ = (char)char1;
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*s = (char)(char2 | 0x80);
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return 3;
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}
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else
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{
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r->_errno = EILSEQ;
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return -1;
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}
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}
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*s = (char) wchar;
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return 1;
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}
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int
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_DEFUN (__jis_wctomb, (r, s, wchar, charset, 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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const char *charset _AND
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mbstate_t *state)
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{
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wint_t wchar = _wchar;
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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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r->_errno = EILSEQ;
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return -1;
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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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#endif /* !__CYGWIN__ */
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#ifdef _MB_EXTENDED_CHARSETS_ISO
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int
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_DEFUN (__iso_wctomb, (r, s, wchar, charset, 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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const char *charset _AND
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mbstate_t *state)
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{
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wint_t wchar = _wchar;
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if (s == NULL)
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return 0;
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/* wchars <= 0x9f translate to all ISO charsets directly. */
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if (wchar >= 0xa0)
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{
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int iso_idx = __iso_8859_index (charset + 9);
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if (iso_idx >= 0)
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{
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unsigned char mb;
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if (s == NULL)
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return 0;
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for (mb = 0; mb < 0x60; ++mb)
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if (__iso_8859_conv[iso_idx][mb] == wchar)
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{
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*s = (char) (mb + 0xa0);
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return 1;
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}
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r->_errno = EILSEQ;
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return -1;
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}
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}
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if ((size_t)wchar >= 0x100)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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*s = (char) wchar;
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return 1;
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}
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#endif /* _MB_EXTENDED_CHARSETS_ISO */
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#ifdef _MB_EXTENDED_CHARSETS_WINDOWS
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int
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_DEFUN (__cp_wctomb, (r, s, wchar, charset, 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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const char *charset _AND
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mbstate_t *state)
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{
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wint_t wchar = _wchar;
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if (s == NULL)
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return 0;
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if (wchar >= 0x80)
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{
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int cp_idx = __cp_index (charset + 2);
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if (cp_idx >= 0)
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{
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unsigned char mb;
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if (s == NULL)
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return 0;
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for (mb = 0; mb < 0x80; ++mb)
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if (__cp_conv[cp_idx][mb] == wchar)
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{
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*s = (char) (mb + 0x80);
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return 1;
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}
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r->_errno = EILSEQ;
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return -1;
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}
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}
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if ((size_t)wchar >= 0x100)
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{
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r->_errno = EILSEQ;
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return -1;
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}
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*s = (char) wchar;
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return 1;
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}
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#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */
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#endif /* _MB_CAPABLE */
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