cleaned up code; fixed some function stuff

1 files changed, 18 insertions, 0 deletions

diff --git a/util/str.c b/util/str.c
new file mode 100644
index 0000000..b05cc63
--- /dev/null
+++ b/util/str.c
@@ -0,0 +1,18 @@
+/* 
+A better alternative to strncpy. dest is guaranteed to be a null-terminated string
+after this function is run.
+Returns the number of characters copied to dest, not including the null character.
+destsz must be greater than 0.
+*/
+size_t str_copy(char *dest, size_t destsz, const char *src) {
+	assert(destsz);
+	for (size_t i = 0; i < destsz-1; i++) {
+		if (!*src) {
+			*dest = 0;
+			return i;
+		}
+		*dest++ = *src++;
+	}
+	dest[destsz] = 0;
+	return destsz-1;
+}