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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdlib/] [mbsnrtowcs.c] - Rev 214
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/* FUNCTION <<mbsrtowcs>>, <<mbsnrtowcs>>---convert a character string to a wide-character string INDEX mbsrtowcs INDEX _mbsrtowcs_r INDEX mbsnrtowcs INDEX _mbsnrtowcs_r ANSI_SYNOPSIS #include <wchar.h> size_t mbsrtowcs(wchar_t *<[dst]>, const char **<[src]>, size_t <[len]>, mbstate_t *<[ps]>); #include <wchar.h> size_t _mbsrtowcs_r(struct _reent *<[ptr]>, wchar_t *<[dst]>, const char **<[src]>, size_t <[len]>, mbstate_t *<[ps]>); #include <wchar.h> size_t mbsnrtowcs(wchar_t *<[dst]>, const char **<[src]>, size_t <[nms]>, size_t <[len]>, mbstate_t *<[ps]>); #include <wchar.h> size_t _mbsnrtowcs_r(struct _reent *<[ptr]>, wchar_t *<[dst]>, const char **<[src]>, size_t <[nms]>, size_t <[len]>, mbstate_t *<[ps]>); TRAD_SYNOPSIS #include <wchar.h> size_t mbsrtowcs(<[dst]>, <[src]>, <[len]>, <[ps]>) wchar_t *<[dst]>; const char **<[src]>; size_t <[len]>; mbstate_t *<[ps]>; #include <wchar.h> size_t _mbsrtowcs_r(<[ptr]>, <[dst]>, <[src]>, <[len]>, <[ps]>) struct _reent *<[ptr]>; wchar_t *<[dst]>; const char **<[src]>; size_t <[len]>; mbstate_t *<[ps]>; #include <wchar.h> size_t mbsnrtowcs(<[dst]>, <[src]>, <[nms]>, <[len]>, <[ps]>) wchar_t *<[dst]>; const char **<[src]>; size_t <[nms]>; size_t <[len]>; mbstate_t *<[ps]>; #include <wchar.h> size_t _mbsnrtowcs_r(<[ptr]>, <[dst]>, <[src]>, <[nms]>, <[len]>, <[ps]>) struct _reent *<[ptr]>; wchar_t *<[dst]>; const char **<[src]>; size_t <[nms]>; size_t <[len]>; mbstate_t *<[ps]>; DESCRIPTION The <<mbsrtowcs>> function converts a sequence of multibyte characters pointed to indirectly by <[src]> into a sequence of corresponding wide characters and stores at most <[len]> of them in the wchar_t array pointed to by <[dst]>, until it encounters a terminating null character ('\0'). 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, <<mbsrtowcs>> uses an internal, static mbstate_t object, which is initialized to the initial conversion state at program startup. The <<mbsnrtowcs>> function behaves identically to <<mbsrtowcs>>, except that conversion stops after reading at most <[nms]> bytes from the buffer pointed to by <[src]>. RETURNS The <<mbsrtowcs>> and <<mbsnrtowcs>> functions return the number of wide characters stored in the array pointed to by <[dst]> if successful, otherwise it returns (size_t)-1. PORTABILITY <<mbsrtowcs>> is defined by the C99 standard. <<mbsnrtowcs>> 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> size_t _DEFUN (_mbsnrtowcs_r, (r, dst, src, nms, len, ps), struct _reent *r _AND wchar_t *dst _AND const char **src _AND size_t nms _AND size_t len _AND mbstate_t *ps) { wchar_t *ptr = dst; const char *tmp_src; size_t max; size_t count = 0; int bytes; #ifdef _MB_CAPABLE if (ps == NULL) { _REENT_CHECK_MISC(r); ps = &(_REENT_MBSRTOWCS_STATE(r)); } #endif if (dst == NULL) { /* Ignore original len value and do not alter src pointer if the dst pointer is NULL. */ len = (size_t)-1; tmp_src = *src; src = &tmp_src; } max = len; while (len > 0) { bytes = _mbrtowc_r (r, ptr, *src, nms, ps); if (bytes > 0) { *src += bytes; nms -= bytes; ++count; ptr = (dst == NULL) ? NULL : ptr + 1; --len; } else if (bytes == -2) { *src += nms; return count; } else if (bytes == 0) { *src = NULL; return count; } else { ps->__count = 0; r->_errno = EILSEQ; return (size_t)-1; } } return (size_t)max; } #ifndef _REENT_ONLY size_t _DEFUN (mbsnrtowcs, (dst, src, nms, len, ps), wchar_t *dst _AND const char **src _AND size_t nms _AND size_t len _AND mbstate_t *ps) { return _mbsnrtowcs_r (_REENT, dst, src, nms, len, ps); } #endif /* !_REENT_ONLY */
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