A update

include/string.h

@@ -0,0 +1,27 @@
+#ifndef STRING_H
+#define STRING_H
+
+#include <types.h>
+
+/* TODO: change all applicable 'int32_t's with 'size_t's. */
+
+size_t strlen(const char* str);
+size_t strcmp(const char *s1, const char *s2);
+int32_t strncmp(const char *s1, const char *s2, size_t n);
+size_t strcpy(char *dst, const char *src);
+char *strncpy(char *dest, const char *src, uint32_t n);
+void strcat(char *dest, const char *src);
+
+int32_t ischar(int32_t c);
+int32_t isspace(char c);
+int32_t isalpha(char c);
+char upper(char c);
+char toupper(char c);
+char lower(char c);
+
+void *memset(void *dst, char c, uint32_t n);
+void *memcpy(void *dst, const void *src, uint32_t n);
+int32_t memcmp(uint8_t *s1, uint8_t *s2, uint32_t n);
+
+
+#endif