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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdlib/] [wcsnrtombs.c] - Rev 301
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/* FUNCTION <<wcsrtombs>>, <<wcsnrtombs>>---convert a wide-character string to a character string INDEX wcsrtombs INDEX _wcsrtombs_r INDEX wcsnrtombs INDEX _wcsnrtombs_r ANSI_SYNOPSIS #include <wchar.h> size_t wcsrtombs(char *<[dst]>, const wchar_t **<[src]>, size_t <[len]>, mbstate_t *<[ps]>); #include <wchar.h> size_t _wcsrtombs_r(struct _reent *<[ptr]>, char *<[dst]>, const wchar_t **<[src]>, size_t <[len]>, mbstate_t *<[ps]>); #include <wchar.h> size_t wcsnrtombs(char *<[dst]>, const wchar_t **<[src]>, size_t <[nwc]>, size_t <[len]>, mbstate_t *<[ps]>); #include <wchar.h> size_t _wcsnrtombs_r(struct _reent *<[ptr]>, char *<[dst]>, const wchar_t **<[src]>, size_t <[nwc]>, size_t <[len]>, mbstate_t *<[ps]>); TRAD_SYNOPSIS #include <wchar.h> size_t wcsrtombs(<[dst]>, <[src]>, <[len]>, <[ps]>) char *<[dst]>; const wchar_t **<[src]>; size_t <[len]>; mbstate_t *<[ps]>; #include <wchar.h> size_t _wcsrtombs_r(<[ptr]>, <[dst]>, <[src]>, <[len]>, <[ps]>) struct _rent *<[ptr]>; char *<[dst]>; const wchar_t **<[src]>; size_t <[len]>; mbstate_t *<[ps]>; #include <wchar.h> size_t wcsnrtombs(<[dst]>, <[src]>, <[nwc]>, <[len]>, <[ps]>) char *<[dst]>; const wchar_t **<[src]>; size_t <[nwc]>; size_t <[len]>; mbstate_t *<[ps]>; #include <wchar.h> size_t _wcsnrtombs_r(<[ptr]>, <[dst]>, <[src]>, <[nwc]>, <[len]>, <[ps]>) struct _rent *<[ptr]>; char *<[dst]>; const wchar_t **<[src]>; size_t <[nwc]>; size_t <[len]>; mbstate_t *<[ps]>; DESCRIPTION The <<wcsrtombs>> function converts a string of wide characters indirectly pointed to by <[src]> to a corresponding multibyte character string stored in the array pointed to by <[dst}>. No more than <[len]> bytes are written to <[dst}>. If <[dst}> is NULL, no characters are stored. If <[dst}> is not NULL, the pointer pointed to by <[src]> is updated to point to the character after the one that conversion stopped at. If conversion stops because a null character is encountered, *<[src]> is set to NULL. The mbstate_t argument, <[ps]>, is used to keep track of the shift state. If it is NULL, <<wcsrtombs>> uses an internal, static mbstate_t object, which is initialized to the initial conversion state at program startup. The <<wcsnrtombs>> function behaves identically to <<wcsrtombs>>, except that conversion stops after reading at most <[nwc]> characters from the buffer pointed to by <[src]>. RETURNS The <<wcsrtombs>> and <<wcsnrtombs>> functions return the number of bytes stored in the array pointed to by <[dst]> (not including any terminating null), if successful, otherwise it returns (size_t)-1. PORTABILITY <<wcsrtombs>> is defined by C99 standard. <<wcsnrtombs>> is defined by the POSIX.1-2008 standard. */ #include <reent.h> #include <newlib.h> #include <wchar.h> #include <stdlib.h> #include <stdio.h> #include <errno.h> #include "local.h" size_t _DEFUN (_wcsnrtombs_r, (r, dst, src, nwc, len, ps), struct _reent *r _AND char *dst _AND const wchar_t **src _AND size_t nwc _AND size_t len _AND mbstate_t *ps) { char *ptr = dst; char buff[10]; wchar_t *pwcs; size_t n; int i; #ifdef _MB_CAPABLE if (ps == NULL) { _REENT_CHECK_MISC(r); ps = &(_REENT_WCSRTOMBS_STATE(r)); } #endif /* If no dst pointer, treat len as maximum possible value. */ if (dst == NULL) len = (size_t)-1; n = 0; pwcs = (wchar_t *)(*src); while (n < len && nwc-- > 0) { int count = ps->__count; wint_t wch = ps->__value.__wch; int bytes = __wctomb (r, buff, *pwcs, __locale_charset (), ps); if (bytes == -1) { r->_errno = EILSEQ; ps->__count = 0; return (size_t)-1; } if (n + bytes <= len) { n += bytes; if (dst) { for (i = 0; i < bytes; ++i) *ptr++ = buff[i]; ++(*src); } if (*pwcs++ == 0x00) { if (dst) *src = NULL; ps->__count = 0; return n - 1; } } else { /* not enough room, we must back up state to before __wctomb call */ ps->__count = count; ps->__value.__wch = wch; len = 0; } } return n; } #ifndef _REENT_ONLY size_t _DEFUN (wcsnrtombs, (dst, src, nwc, len, ps), char *dst _AND const wchar_t **src _AND size_t nwc _AND size_t len _AND mbstate_t *ps) { return _wcsnrtombs_r (_REENT, dst, src, nwc, len, ps); } #endif /* !_REENT_ONLY */
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