初始化

clks/lib/string.c

@@ -0,0 +1,70 @@
+#include <clks/string.h>
+
+usize clks_strlen(const char *str) {
+    usize len = 0;
+
+    while (str[len] != '\0') {
+        len++;
+    }
+
+    return len;
+}
+
+void *clks_memset(void *dst, int value, usize count) {
+    u8 *d = (u8 *)dst;
+    u8 v = (u8)value;
+    usize i;
+
+    for (i = 0; i < count; i++) {
+        d[i] = v;
+    }
+
+    return dst;
+}
+
+void *clks_memcpy(void *dst, const void *src, usize count) {
+    u8 *d = (u8 *)dst;
+    const u8 *s = (const u8 *)src;
+    usize i;
+
+    for (i = 0; i < count; i++) {
+        d[i] = s[i];
+    }
+
+    return dst;
+}
+
+void *clks_memmove(void *dst, const void *src, usize count) {
+    u8 *d = (u8 *)dst;
+    const u8 *s = (const u8 *)src;
+    usize i;
+
+    if (d == s || count == 0) {
+        return dst;
+    }
+
+    if (d < s) {
+        for (i = 0; i < count; i++) {
+            d[i] = s[i];
+        }
+    } else {
+        for (i = count; i != 0; i--) {
+            d[i - 1] = s[i - 1];
+        }
+    }
+
+    return dst;
+}
+
+int clks_strcmp(const char *left, const char *right) {
+    usize i = 0;
+
+    while (left[i] != '\0' && right[i] != '\0') {
+        if (left[i] != right[i]) {
+            return (int)((u8)left[i] - (u8)right[i]);
+        }
+        i++;
+    }
+
+    return (int)((u8)left[i] - (u8)right[i]);
+}