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Diffstat (limited to 'newlib/libc/stdlib/mbsnrtowcs.c')
-rw-r--r-- | newlib/libc/stdlib/mbsnrtowcs.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/newlib/libc/stdlib/mbsnrtowcs.c b/newlib/libc/stdlib/mbsnrtowcs.c new file mode 100644 index 000000000..6729df951 --- /dev/null +++ b/newlib/libc/stdlib/mbsnrtowcs.c @@ -0,0 +1,179 @@ +/* +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 */ |