X-Git-Url: https://plomlompom.com/repos/?a=blobdiff_plain;f=src%2Freadwrite.h;h=cf4de14cb108750527cc0368e88ee2f68546cd43;hb=c8ff28bbc9394d2788bc9d106f1375c6c7836f34;hp=62e222a85467b8fe5ce42aa30f4037e34f3ff9c8;hpb=cbb8526dc9982af9e4611a9e77ba4ca1392f2c02;p=plomrogue

diff --git a/src/readwrite.h b/src/readwrite.h
index 62e222a..cf4de14 100644
--- a/src/readwrite.h
+++ b/src/readwrite.h
@@ -1,18 +1,28 @@
-/*   readwrite.h:
+/* readwrite.h:
  *
- *   Routines for reading/writing multibyte data from/to files. They ensure a
- *   defined endianness.
+ * Routines for reading/writing (multi-)byte data from/to files. They ensure a
+ * defined endianness.
  */
 
 #ifndef READWRITE_H
 #define READWRITE_H
 
-#include <stdio.h>
-#include <stdint.h>
 
-extern uint16_t read_uint16_bigendian( FILE * file );
-extern uint32_t read_uint32_bigendian( FILE * file );
-extern void     write_uint16_bigendian( uint16_t x, FILE * file );
-extern void     write_uint32_bigendian( uint32_t x, FILE * file );
+
+#include <stdio.h> /* for FILE typedef */
+#include <stdint.h> /* 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