X-Git-Url: https://plomlompom.com/repos/foo.html?a=blobdiff_plain;f=src%2Freadwrite.h;h=cf4de14cb108750527cc0368e88ee2f68546cd43;hb=3b2c82991c9ab169b33248c7be840a9bcd351e6d;hp=28bc3ab2316f5a0dfb1e667aec337edf57c90417;hpb=e9d8b1aca776341c9cdaa2ea6406336661d82a76;p=plomrogue
diff --git a/src/readwrite.h b/src/readwrite.h
index 28bc3ab..cf4de14 100644
--- a/src/readwrite.h
+++ b/src/readwrite.h
@@ -1,5 +1,28 @@
-uint16_t read_uint16_bigendian(FILE * file);
-void write_uint16_bigendian(uint16_t x, FILE * file);
-uint32_t read_uint32_bigendian(FILE * file);
-void write_uint32_bigendian(uint32_t x, FILE * file);
+/* readwrite.h:
+ *
+ * Routines for reading/writing (multi-)byte data from/to files. They ensure a
+ * defined endianness.
+ */
+#ifndef READWRITE_H
+#define READWRITE_H
+
+
+
+#include /* for FILE typedef */
+#include /* for uint8_t, uint16_t, uint32_t */
+
+
+
+/* Each function returns 0 on success and 1 on failure. "x" is the value to be
+ * written to "file" for write_* functions and for read_* functions the pointer
+ * to where the value read from "file" is to be written.
+ */
+extern uint8_t read_uint8(FILE * file, uint8_t * x);
+extern uint8_t read_uint16_bigendian(FILE * file, uint16_t * x);
+extern uint8_t read_uint32_bigendian(FILE * file, uint32_t * x);
+extern uint8_t write_uint8(uint8_t x, FILE * file);
+extern uint8_t write_uint16_bigendian(uint16_t x, FILE * file);
+extern uint8_t write_uint32_bigendian(uint32_t x, FILE * file);
+
+#endif