1 files changed, 50 insertions, 0 deletions
diff --git a/src/pdclib/functions/string/strxfrm.c b/src/pdclib/functions/string/strxfrm.c
new file mode 100644
index 0000000..e08dba2
--- /dev/null
+++ b/src/pdclib/functions/string/strxfrm.c
@@ -0,0 +1,50 @@
+/* strxfrm( char *, const char *, size_t )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <string.h>
+
+#ifndef REGTEST
+
+#include <locale.h>
+
+size_t strxfrm( char * _PDCLIB_restrict s1, const char * _PDCLIB_restrict s2, size_t n )
+{
+    size_t len = strlen( s2 );
+    if ( len < n )
+    {
+        /* Cannot use strncpy() here as the filling of s1 with '\0' is not part
+           of the spec.
+        */
+        /* FIXME: The code below became invalid when we started doing *real* locales... */
+        /*while ( n-- && ( *s1++ = _PDCLIB_lc_collate[(unsigned char)*s2++].collation ) );*/
+        while ( n-- && ( *s1++ = (unsigned char)*s2++ ) );
+    }
+    return len;
+}
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+    char s[] = "xxxxxxxxxxx";
+    TESTCASE( strxfrm( NULL, "123456789012", 0 ) == 12 );
+    TESTCASE( strxfrm( s, "123456789012", 12 ) == 12 );
+    /*
+    The following test case is true in *this* implementation, but doesn't have to.
+    TESTCASE( s[0] == 'x' );
+    */
+    TESTCASE( strxfrm( s, "1234567890", 11 ) == 10 );
+    TESTCASE( s[0] == '1' );
+    TESTCASE( s[9] == '0' );
+    TESTCASE( s[10] == '\0' );
+    return TEST_RESULTS;
+}
+
+#endif