DOCS: Added docs to imgio and refactored some of the names and code of imgio

include/image/utils.h

@@ -9,6 +9,7 @@
 
 // The u in the BYTE Macros are for unsigned calls so colors are not changed to
 // signed and the values cut in half
+#include <stddef.h>
 #define BYTE_A 0xFF000000u   /**< Isolates the First Byte for alpha */
 #define BYTE_R 0x00FF0000u   /**< Isolates the Second Byte for red */
 #define BYTE_G 0x0000FF00u   /**< Isolates the Third Byte for green */
@@ -21,6 +22,7 @@
 #define SHIFT_16 16 /**< Constant shift of 16-Bits */
 #define SHIFT_24 24 /**< Constant shift of 24-Bits */
 
+// These are success and error codes
 #define SUCCESS 0
 
 #define FAILURE 1
@@ -31,11 +33,14 @@
 #define ERR_IMG_NULL 24
 #define ERR_IMG_NAME_INVALID 25
 #define ERR_JHEADER 26
+#define ERR_MALLOC_NULL 27
 
 extern const char* error_messages[];
 
-#define LOG(msg) printf("LOG: %s\n", msg)
-#define LOGERROR(error_code) printf("ERROR: %s\n", error_messages[error_code])
+#define LOG(msg) printf("LOG: %s\n", msg) /**< Print log message*/
+#define LOGERROR(error_code)  \
+	printf("ERROR: %s\n", \
+	       error_messages[error_code]) /**< Print log error message*/
 
 /**
  *
@@ -167,4 +172,7 @@ print_attr(const PPM* src);
 void __attribute__((overloadable))
 print_attr(const JPEG* src);
 
+size_t
+find_extension(const char* n);
+
 #endif