Added AMAZING boot menu to KBOOT

boot/stage2/string.c

@@ -0,0 +1,74 @@
+#include "stdint.h"
+#include "string.h"
+
+char* itoa(size_t val, int base) {
+	static char buf[32] = { 0 };
+
+	if (base == 0 || base > 16) return NULL; 
+
+	if (val == 0) {
+		buf[0] = '0';
+		buf[1] = '\0';
+		return buf;
+	}
+
+	int i;
+	buf[31] = '\0';
+	for (i = 30; val && i; i--, val /= base) {
+		buf[i] = "0123456789abcdef"[val % base];
+	}
+
+	return &buf[i + 1];
+}
+
+void* memcpy(void* src, void* dst, size_t length) {
+	uint8_t* p = dst;
+	size_t i = 0;
+	while (i < length) p[i] = *(uint8_t*)(src + i);
+	return dst;
+}
+
+void* memset(void* dst, uint8_t val, size_t length) {
+	uint8_t* p = dst;
+	size_t i = 0;
+	while (i < length) p[i++] = val;
+	return dst;
+}
+
+char* strcpy(char* str1, const char* str2) {
+	char* p = str1;
+	while (*str2 != '\0') *p++ = *str2++;
+	return str1;
+}
+
+char* strcat(char* str1, const char* str2) {
+	char* p = str1;
+	while (*str2++ != '\0');
+	while (*str2 != '\0') *p++ = *str2++;
+	return str1;
+}
+
+char* strchr(const char* str, char c) {
+	char* p = (char*)str;
+	while (*p != '\0' && *p != c) p++;
+    	return (*p == c) ? p : NULL;
+}
+
+int strcmp(const char* str1, const char* str2) {
+    while (*str1 != '\0' && *str1 == *str2) {
+        str1++;
+        str2++;
+    }
+
+    uint8_t c1 = (*(uint8_t*)str1);
+    uint8_t c2 = (*(uint8_t*)str2);
+
+    return ((c1 < c2) ? -1 : (c1 > c2));
+}
+
+size_t strlen(const char* str) {
+	size_t len = 0;
+	while (str[len++] != '\0');
+	return len;
+}
+