heirloom vi fixes from arch AUR

1 files changed, 47 insertions, 0 deletions

diff --git a/compat.c b/compat.c
new file mode 100644
index 0000000..85a46b1
--- /dev/null
+++ b/compat.c
@@ -0,0 +1,47 @@
+/* Carsten Kunze, 2016 */
+
+#include <string.h>
+
+#ifndef HAVE_STRLCPY
+size_t
+strlcpy(char *dst, const char *src, size_t dstsize) {
+	size_t srcsize;
+	/* Not conform to strlcpy, but avoids to access illegal memory in case
+	 * of unterminated strings */
+	for (srcsize = 0; srcsize < dstsize; srcsize++)
+		if (!src[srcsize])
+			break;
+	if (dstsize > srcsize)
+		dstsize = srcsize;
+	else if (dstsize)
+		dstsize--;
+	if (dstsize)
+		/* assumes non-overlapping buffers */
+		memcpy(dst, src, dstsize);
+	dst[dstsize] = 0;
+	return srcsize;
+}
+#endif
+
+#ifndef HAVE_STRLCAT
+size_t
+strlcat(char *dst, const char *src, size_t dstsize) {
+	size_t ld, ls;
+	for (ld = 0; ld < dstsize - 1; ld++)
+		if (!dst[ld])
+			break;
+	dst += ld;
+	dstsize -= ld;
+	for (ls = 0; ls < dstsize; ls++)
+		if (!src[ls])
+			break;
+	if (dstsize > ls)
+		dstsize = ls;
+	else if (dstsize)
+		dstsize--;
+	if (dstsize)
+		memcpy(dst, src, dstsize);
+	dst[dstsize] = 0;
+	return ld + ls;
+}
+#endif