PDCLIB-2 PDCLIB-9: Add char32/char16 conversions to header, incl. optional extras...

[pdclib] / functions / uchar / _PDCLIB_c32srtombs.c

diff --git a/functions/uchar/_PDCLIB_c32srtombs.c b/functions/uchar/_PDCLIB_c32srtombs.c
new file mode 100644 (file)
index 0000000..da80259
--- /dev/null
+++ b/functions/uchar/_PDCLIB_c32srtombs.c
@@ -0,0 +1,60 @@
+/* _PDCLIB_c32srtombs(
+    char            *_PDCLIB_restrict   dst, 
+    const char32_t **_PDCLIB_restrict   src, 
+    size_t                              len, 
+    mbstate_t       *_PDCLIB_restrict   ps);
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#ifndef REGTEST
+#include <uchar.h>
+#include <errno.h>
+#include <stdint.h>
+#include <_PDCLIB_encoding.h>
+#include <_PDCLIB_locale.h>
+
+size_t _PDCLIB_c32srtombs_l(
+    char                *restrict   dst, 
+    const char32_t     **restrict   src, 
+    size_t                          len, 
+    mbstate_t           *restrict   ps,
+    _PDCLIB_locale_t     restrict   l)
+{
+    char *restrict *restrict dstp = dst ? &dst : NULL;
+    len = dst ? len : SIZE_MAX;
+    
+    size_t srclen = _PDCLIB_c32slen(*src);
+    size_t dstlen = len;
+
+    if(l->_Codec->__c32stombs(dstp, &dstlen, src, &srclen, ps)) {
+        // Successful conversion
+        return len - dstlen;
+    } else {
+        // Failed conversion
+        errno = EILSEQ;
+        return (size_t) -1;
+    }
+}
+
+size_t _PDCLIB_c32srtombs(
+    char                *restrict   dst, 
+    const char32_t     **restrict   src, 
+    size_t                          len, 
+    mbstate_t           *restrict   ps
+)
+{
+    return _PDCLIB_c32srtombs_l(dst, src, len, ps, _PDCLIB_threadlocale());
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    return TEST_RESULTS;
+}
+#endif
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