Add /strl(cpy|cat)/ under _BSD_SOURCE guards

[pdclib.old] / functions / string / strlcat.c

diff --git a/functions/string/strlcat.c b/functions/string/strlcat.c
new file mode 100644 (file)
index 0000000..34a47d4
--- /dev/null
+++ b/functions/string/strlcat.c
@@ -0,0 +1,60 @@
+/* strlcat(
+   char *_PDCLIB_restrict _Dst,
+   const char *_PDCLIB_restict _Src,
+   size_t _DstSize)
+
+   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
+
+#pragma weak strlcat = _PDCLIB_strlcat
+size_t _PDCLIB_strlcat(
+   char *restrict dst,
+   const char *restrict src,
+   size_t dstsize);
+
+size_t _PDCLIB_strlcat(
+   char *restrict dst,
+   const char *restrict src,
+   size_t dstsize)
+{
+    size_t needed = 0;
+    size_t j = 0;
+
+    while(dst[needed]) needed++;
+
+    while(needed < dstsize && (dst[needed] = src[j]))
+        needed++, j++;
+
+    while(src[j++]) needed++;
+    needed++;
+
+    if (needed > dstsize && dstsize)
+      dst[dstsize - 1] = 0;
+
+    return needed;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+    char dstbuf[16];
+
+    strcpy(dstbuf, "hi");
+    TESTCASE_NOREG( strlcat(dstbuf, "", 16) == 3 );
+    TESTCASE_NOREG( strlcat(dstbuf, "hi", 16) == 5 );
+    TESTCASE_NOREG( strlcat(dstbuf, "hello, world", 16) == 17 );
+    TESTCASE_NOREG( strlcat(dstbuf, "hi", 16) == 18 );
+    TESTCASE_NOREG( strcmp(dstbuf, "hihihello, worl") == 0);
+    return TEST_RESULTS;
+}
+
+#endif