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30 .Nd "convert a character string to a wide-character string (restartable)"
37 .Fa "wchar_t * restrict dst" "const char ** restrict src" "size_t len"
38 .Fa "mbstate_t * restrict ps"
42 .Fa "wchar_t * restrict dst" "const char ** restrict src" "size_t nms"
43 .Fa "size_t len" "mbstate_t * restrict ps"
48 function converts a sequence of multibyte characters pointed to indirectly by
50 into a sequence of corresponding wide characters and stores at most
56 until it encounters a terminating null character
63 no characters are stored.
69 the pointer pointed to by
71 is updated to point to the character after the one that conversion stopped at.
72 If conversion stops because a null character is encountered,
81 is used to keep track of the shift state.
85 uses an internal, static
87 object, which is initialized to the initial conversion state
92 function behaves identically to
94 except that conversion stops after reading at most
96 bytes from the buffer pointed to by
105 functions return the number of wide characters stored in
106 the array pointed to by
111 was NULL then the functions
115 return the number of wide characters that would have been stored where
117 points to an infinitely large array.
119 If either one of the functions is not successful then
120 .Po Vt size_t Pc Ns \-1
127 functions will fail if:
130 An invalid multibyte character sequence was encountered.
132 The conversion state is invalid.
147 function is an extension to the standard.