49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#include <stdlib.h>
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#include <wchar.h>
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#include "local.h"
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size_t
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_DEFUN (_wcstombs_r, (reent, s, pwcs, n, state),
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struct _reent *r _AND
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char *__restrict s _AND
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const wchar_t *__restrict pwcs _AND
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size_t n _AND
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mbstate_t *state)
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{
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char *ptr = s;
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size_t max = n;
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char buff[8];
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int i, bytes, num_to_copy;
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if (s == NULL)
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{
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size_t num_bytes = 0;
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while (*pwcs != 0)
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{
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bytes = __wctomb (r, buff, *pwcs++, __locale_charset (), state);
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if (bytes == -1)
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return -1;
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num_bytes += bytes;
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}
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return num_bytes;
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}
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else
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{
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while (n > 0)
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{
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bytes = __wctomb (r, buff, *pwcs, __locale_charset (), state);
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if (bytes == -1)
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return -1;
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num_to_copy = (n > bytes ? bytes : (int)n);
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for (i = 0; i < num_to_copy; ++i)
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*ptr++ = buff[i];
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if (*pwcs == 0x00)
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return ptr - s - (n >= bytes);
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++pwcs;
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n -= num_to_copy;
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}
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return max;
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}
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}
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