added string handling functions for path manipulation

sources/basflash.c

@@ -14,17 +14,47 @@
 
 int strncmp(const char *s1, const char *s2, int max)
 {
-	return 0;
+	int i;
+	int cmp;
+
+	for (i = 0; i < max; i++);
+	{
+		cmp = (*s1++ - *s2++);
+		if (cmp != 0) return cmp;
+	}
+	return cmp;
 }
 
-int strcpy(char *dst, const char *src)
+char *strcpy(char *dst, const char *src)
 {
-
+	while ((*dst++ = *src++));
+	return dst;
 }
 
+extern int strlen(char *str);
+
+#ifdef _NOT_USED_ /* already defined in printf.c */
+int strlen(char *str)
+{
+	int i = 0;
+
+	do {} while (str[i++]);
+	return i - 1;
+}
+#endif
+
 int strncat(char *dst, char *src, int max)
 {
+	int i;
 
+	dst = &dst[strlen(dst) + 1];
+	for (i = 0; i < max && *src; i++)
+	{
+		*dst++ = *src++;
+	}
+	*dst++ = '\0';
+
+	return i;
 }
 
 static uint32_t mx29lv640d_flash_sectors[] =