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newlib-cygwin/newlib/libc/stdlib/wctomb_r.c

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#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <locale.h>
#include "mbctype.h"
#include "local.h"
int (*__wctomb) (struct _reent *, char *, wchar_t, const char *charset,
mbstate_t *)
#ifdef __CYGWIN__
/* Cygwin starts up in UTF-8 mode. */
= __utf8_wctomb;
#else
= __ascii_wctomb;
#endif
int
_DEFUN (_wctomb_r, (r, s, wchar, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
mbstate_t *state)
{
return __wctomb (r, s, _wchar, __locale_charset (), state);
}
int
_DEFUN (__ascii_wctomb, (r, s, wchar, charset, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
const char *charset _AND
mbstate_t *state)
{
/* Avoids compiler warnings about comparisons that are always false
due to limited range when sizeof(wchar_t) is 2 but sizeof(wint_t)
is 4, as is the case on cygwin. */
wint_t wchar = _wchar;
if (s == NULL)
return 0;
#ifdef __CYGWIN__
if ((size_t)wchar >= 0x80)
#else
if ((size_t)wchar >= 0x100)
#endif
{
r->_errno = EILSEQ;
return -1;
}
*s = (char) wchar;
return 1;
}
#ifdef _MB_CAPABLE
/* for some conversions, we use the __count field as a place to store a state value */
#define __state __count
int
_DEFUN (__utf8_wctomb, (r, s, wchar, charset, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
const char *charset _AND
mbstate_t *state)
{
wint_t wchar = _wchar;
int ret = 0;
if (s == NULL)
return 0; /* UTF-8 encoding is not state-dependent */
if (sizeof (wchar_t) == 2 && state->__count == -4
&& (wchar < 0xdc00 || wchar > 0xdfff))
{
/* There's a leftover lone high surrogate. Write out the CESU-8 value
of the surrogate and proceed to convert the given character. Note
to return extra 3 bytes. */
wchar_t tmp;
tmp = (state->__value.__wchb[0] << 16 | state->__value.__wchb[1] << 8)
- (0x10000 >> 10 | 0xd80d);
*s++ = 0xe0 | ((tmp & 0xf000) >> 12);
*s++ = 0x80 | ((tmp & 0xfc0) >> 6);
*s++ = 0x80 | (tmp & 0x3f);
state->__count = 0;
ret = 3;
}
if (wchar <= 0x7f)
{
*s = wchar;
return ret + 1;
}
if (wchar >= 0x80 && wchar <= 0x7ff)
{
*s++ = 0xc0 | ((wchar & 0x7c0) >> 6);
*s = 0x80 | (wchar & 0x3f);
return ret + 2;
}
if (wchar >= 0x800 && wchar <= 0xffff)
{
/* No UTF-16 surrogate handling in UCS-4 */
if (sizeof (wchar_t) == 2 && wchar >= 0xd800 && wchar <= 0xdfff)
{
wint_t tmp;
if (wchar <= 0xdbff)
{
/* First half of a surrogate pair. Store the state and
return ret + 0. */
tmp = ((wchar & 0x3ff) << 10) + 0x10000;
state->__value.__wchb[0] = (tmp >> 16) & 0xff;
state->__value.__wchb[1] = (tmp >> 8) & 0xff;
state->__count = -4;
*s = (0xf0 | ((tmp & 0x1c0000) >> 18));
return ret;
}
if (state->__count == -4)
{
/* Second half of a surrogate pair. Reconstruct the full
Unicode value and return the trailing three bytes of the
UTF-8 character. */
tmp = (state->__value.__wchb[0] << 16)
| (state->__value.__wchb[1] << 8)
| (wchar & 0x3ff);
state->__count = 0;
*s++ = 0xf0 | ((tmp & 0x1c0000) >> 18);
*s++ = 0x80 | ((tmp & 0x3f000) >> 12);
*s++ = 0x80 | ((tmp & 0xfc0) >> 6);
*s = 0x80 | (tmp & 0x3f);
return 4;
}
/* Otherwise translate into CESU-8 value. */
}
*s++ = 0xe0 | ((wchar & 0xf000) >> 12);
*s++ = 0x80 | ((wchar & 0xfc0) >> 6);
*s = 0x80 | (wchar & 0x3f);
return ret + 3;
}
if (wchar >= 0x10000 && wchar <= 0x10ffff)
{
*s++ = 0xf0 | ((wchar & 0x1c0000) >> 18);
*s++ = 0x80 | ((wchar & 0x3f000) >> 12);
*s++ = 0x80 | ((wchar & 0xfc0) >> 6);
*s = 0x80 | (wchar & 0x3f);
return 4;
}
r->_errno = EILSEQ;
return -1;
}
/* Cygwin defines its own doublebyte charset conversion functions
because the underlying OS requires wchar_t == UTF-16. */
#ifndef __CYGWIN__
int
_DEFUN (__sjis_wctomb, (r, s, wchar, charset, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
const char *charset _AND
mbstate_t *state)
{
wint_t wchar = _wchar;
unsigned char char2 = (unsigned char)wchar;
unsigned char char1 = (unsigned char)(wchar >> 8);
if (s == NULL)
return 0; /* not state-dependent */
if (char1 != 0x00)
{
/* first byte is non-zero..validate multi-byte char */
if (_issjis1(char1) && _issjis2(char2))
{
*s++ = (char)char1;
*s = (char)char2;
return 2;
}
else
{
r->_errno = EILSEQ;
return -1;
}
}
*s = (char) wchar;
return 1;
}
int
_DEFUN (__eucjp_wctomb, (r, s, wchar, charset, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
const char *charset _AND
mbstate_t *state)
{
wint_t wchar = _wchar;
unsigned char char2 = (unsigned char)wchar;
unsigned char char1 = (unsigned char)(wchar >> 8);
if (s == NULL)
return 0; /* not state-dependent */
if (char1 != 0x00)
{
/* first byte is non-zero..validate multi-byte char */
if (_iseucjp1 (char1) && _iseucjp2 (char2))
{
*s++ = (char)char1;
*s = (char)char2;
return 2;
}
else if (_iseucjp2 (char1) && _iseucjp2 (char2 | 0x80))
{
*s++ = (char)0x8f;
*s++ = (char)char1;
*s = (char)(char2 | 0x80);
return 3;
}
else
{
r->_errno = EILSEQ;
return -1;
}
}
*s = (char) wchar;
return 1;
}
int
_DEFUN (__jis_wctomb, (r, s, wchar, charset, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
const char *charset _AND
mbstate_t *state)
{
wint_t wchar = _wchar;
int cnt = 0;
unsigned char char2 = (unsigned char)wchar;
unsigned char char1 = (unsigned char)(wchar >> 8);
if (s == NULL)
return 1; /* state-dependent */
if (char1 != 0x00)
{
/* first byte is non-zero..validate multi-byte char */
if (_isjis (char1) && _isjis (char2))
{
if (state->__state == 0)
{
/* must switch from ASCII to JIS state */
state->__state = 1;
*s++ = ESC_CHAR;
*s++ = '$';
*s++ = 'B';
cnt = 3;
}
*s++ = (char)char1;
*s = (char)char2;
return cnt + 2;
}
r->_errno = EILSEQ;
return -1;
}
if (state->__state != 0)
{
/* must switch from JIS to ASCII state */
state->__state = 0;
*s++ = ESC_CHAR;
*s++ = '(';
*s++ = 'B';
cnt = 3;
}
*s = (char)char2;
return cnt + 1;
}
#endif /* !__CYGWIN__ */
#ifdef _MB_EXTENDED_CHARSETS_ISO
int
_DEFUN (__iso_wctomb, (r, s, wchar, charset, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
const char *charset _AND
mbstate_t *state)
{
wint_t wchar = _wchar;
if (s == NULL)
return 0;
/* wchars <= 0x9f translate to all ISO charsets directly. */
if (wchar >= 0xa0)
{
int iso_idx = __iso_8859_index (charset + 9);
if (iso_idx >= 0)
{
unsigned char mb;
if (s == NULL)
return 0;
for (mb = 0; mb < 0x60; ++mb)
if (__iso_8859_conv[iso_idx][mb] == wchar)
{
*s = (char) (mb + 0xa0);
return 1;
}
r->_errno = EILSEQ;
return -1;
}
}
if ((size_t)wchar >= 0x100)
{
r->_errno = EILSEQ;
return -1;
}
*s = (char) wchar;
return 1;
}
#endif /* _MB_EXTENDED_CHARSETS_ISO */
#ifdef _MB_EXTENDED_CHARSETS_WINDOWS
int
_DEFUN (__cp_wctomb, (r, s, wchar, charset, state),
struct _reent *r _AND
char *s _AND
wchar_t _wchar _AND
const char *charset _AND
mbstate_t *state)
{
wint_t wchar = _wchar;
if (s == NULL)
return 0;
if (wchar >= 0x80)
{
int cp_idx = __cp_index (charset + 2);
if (cp_idx >= 0)
{
unsigned char mb;
if (s == NULL)
return 0;
for (mb = 0; mb < 0x80; ++mb)
if (__cp_conv[cp_idx][mb] == wchar)
{
*s = (char) (mb + 0x80);
return 1;
}
r->_errno = EILSEQ;
return -1;
}
}
if ((size_t)wchar >= 0x100)
{
r->_errno = EILSEQ;
return -1;
}
*s = (char) wchar;
return 1;
}
#endif /* _MB_EXTENDED_CHARSETS_WINDOWS */
#endif /* _MB_CAPABLE */
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