Some stuff added to userland.

1 files changed, 39 insertions, 0 deletions

diff --git a/src/library/std/string.c b/src/library/std/string.c
new file mode 100644
index 0000000..869256a
--- /dev/null
+++ b/src/library/std/string.c
@@ -0,0 +1,39 @@
+#include <string.h>
+
+int strlen(const char *str) {
+	int i = 0;
+	while (str[i++]);
+	return i;
+}
+
+void *memcpy(void *vd, const void *vs, int count) {
+	uint8_t *dest = (uint8_t*)vd, *src = (uint8_t*)vs;
+	uint32_t f = count % 4, n = count / 4, i;
+	const uint32_t* s = (uint32_t*)src;
+	uint32_t* d = (uint32_t*)dest;
+	for (i = 0; i < n; i++) {
+		d[i] = s[i];
+	}
+	if (f != 0) {
+		for (i = count - f; i < count; i++) {
+			dest[i] = src[i];
+		}
+	}
+	return vd;
+}
+
+uint8_t *memset(uint8_t *dest, uint8_t val, int count) {
+	int i;
+	for (i = 0; i < count; i++) {
+		dest[i] = val;
+	}
+	return dest;
+}
+
+uint16_t *memsetw(uint16_t *dest, uint16_t val, int count) {
+	int i;
+	for (i = 0; i < count; i++) {
+		dest[i] = val;
+	}
+	return dest;
+}