More library functions & renaming.

2 files changed, 68 insertions, 8 deletions

diff --git a/kernel/lib/stdlib.c b/kernel/lib/stdlib.c
deleted file mode 100644
index 6710da2..0000000
--- a/kernel/lib/stdlib.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include <stdlib.h>
-
-size_t strlen(const char* str) {
-	size_t ret = 0;
-	while (str[ret] != 0)
-		ret++;
-	return ret;
-}
diff --git a/kernel/lib/string.c b/kernel/lib/string.c
new file mode 100644
index 0000000..da8f60e
--- /dev/null
+++ b/kernel/lib/string.c
@@ -0,0 +1,68 @@
+#include <string.h>
+
+
+size_t strlen(const char* str) {
+	size_t ret = 0;
+	while (str[ret] != 0)
+		ret++;
+	return ret;
+}
+
+char *strchr(const char *str, char c) {
+	while (*str) {
+		if (*str == c) return (char*)str;
+		str++;
+	}
+	return NULL;
+}
+
+char *strcpy(char *dest, const char *src) {
+	memcpy(dest, src, strlen(src) + 1);
+	return (char*)src;
+}
+
+char *strcat(char *dest, const char *src) {
+	char *dest2 = dest;
+	dest2 += strlen(dest) - 1;
+	while (*src) {
+		*dest2 = *src;
+		src++;
+		dest2++;
+	}
+	*dest2 = 0;
+	return dest;
+}
+
+int strcmp(const char *s1, const char *s2) {
+	while ((*s1) && (*s1 == *s2)) {
+		s1++;
+		s2++;
+	}
+	return (* (unsigned char*)s1 - *(unsigned char*)s2);
+}
+
+void *memcpy(void *vd, const void *vs, int count) {
+	uint8_t *dest = (uint8_t*)vd, *src = (uint8_t*)vs;
+	int 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;
+}
+
+void *memset(void *dest, int val, int count) {
+	uint8_t *dest_c = (uint8_t*)dest;
+	int i;
+	for (i = 0; i < count; i++) {
+		dest_c[i] = val;
+	}
+	return dest;
+}
+