C: categorize files, update .gitignore

c-programming/io/fwrite_le.h

@@ -0,0 +1,32 @@
+/*
+ * fwrite_le.h
+ *
+ * Author: Intel A80486DX2-66
+ * License: Creative Commons Zero 1.0 Universal
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef _FWRITE_LE_H
+#define _FWRITE_LE_H
+
+#define FWRITE_LE_NO_MODIFICATION 0
+
+#define DETECTED_LITTLE_ENDIAN 0
+#define DETECTED_BIG_ENDIAN 1
+#define UNSUPPORTED_ENDIANNESS -1
+
+int detect_endianness(void);
+size_t fwrite_le(void* ptr, size_t size, size_t count, FILE* stream);
+void reorder_le_be(
+#if FWRITE_LE_NO_MODIFICATION
+	uint8_t* dest, uint8_t* src,
+#else
+	uint8_t* bytes,
+#endif
+	size_t count, size_t step);
+
+#endif /* _FWRITE_LE_H */