Implement storedevs, prepare to port littlefs

kernel/std/string.c

@@ -12,3 +12,28 @@ void *memcpy(void *dst, const void *src, size_t n) {
 size_t strlen(char *s) {
   return hal_strlen(s);
 }
+
+int strcmp(const char *a, const char *b) {
+  return hal_strcmp(a, b);
+}
+
+size_t strcspn(const char *s, const char *reject) {
+  return hal_strcspn(s, reject);
+}
+
+size_t strspn(const char *s, const char *accept) {
+  return hal_strspn(s, accept);
+}
+
+
+char *strcpy(char *dest, const char *src) {
+  return hal_strcpy(dest, src);
+}
+
+char *strchr(const char *s, int c) {
+  return hal_strchr(s, c);
+}
+
+int memcmp(const void *s1, const void *s2, int len) {
+  return hal_memcmp(s1, s2, len);
+}