- Start rosapps rearrange and cleanup process.

svn path=/trunk/; revision=34303

rosapps/applications/net/ncftp/Strn/Strnpcpy.c

@@ -0,0 +1,54 @@
+#include <sys/types.h>
+#include <string.h>
+#include "Strn.h"
+
+/*
+ * Copy src to dst, truncating or null-padding to always copy n-1 bytes.
+ *
+ * This routine differs from strncpy in that it returns a pointer to the end
+ * of the buffer, instead of strncat which returns a pointer to the start.
+ */
+char *
+Strnpcpy(char *const dst, const char *const src, size_t n)
+{
+	register char *d;
+	register const char *s;
+	register char c;
+	char *ret;
+	register size_t i;
+
+	d = dst;
+	if (n != 0) {
+		s = src;
+		/* If they specified a maximum of n characters, use n - 1 chars to
+		 * hold the copy, and the last character in the array as a NUL.
+		 * This is the difference between the regular strncpy routine.
+		 * strncpy doesn't guarantee that your new string will have a
+		 * NUL terminator, but this routine does.
+		 */
+		for (i=1; i<n; i++) {
+			c = *s++;
+			if (c == '\0') {
+				ret = d;	/* Return ptr to end byte. */
+				*d++ = c;
+#if (STRNP_ZERO_PAD == 1)
+				/* Pad with zeros. */
+				for (; i<n; i++)
+					*d++ = 0;
+#endif	/* STRNP_ZERO_PAD */
+				return ret;
+			}
+			*d++ = c;
+		}
+		/* If we get here, then we have a full string, with n - 1 characters,
+		 * so now we NUL terminate it and go home.
+		 */
+		*d = '\0';
+		return (d);	/* Return ptr to end byte. */
+	} else {
+		*d = 0;
+	}
+	return (d);	/* Return ptr to end byte. */
+}	/* Strnpcpy */
+
+/* eof Strn.c */