| /* |
| 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 */ |