1 files changed, 98 insertions, 10 deletions
diff --git a/src/common/grfio.h b/src/common/grfio.h
index 36ed8fb39..857bc507e 100644
--- a/src/common/grfio.h
+++ b/src/common/grfio.h
@@ -2,7 +2,7 @@
  * This file is part of Hercules.
  * http://herc.ws - http://github.com/HerculesWS/Hercules
  *
- * Copyright (C) 2012-2015  Hercules Dev Team
+ * Copyright (C) 2012-2016  Hercules Dev Team
  * Copyright (C)  Athena Dev Teams
  *
  * Hercules is free software: you can redistribute it and/or modify
@@ -21,16 +21,104 @@
 #ifndef COMMON_GRFIO_H
 #define COMMON_GRFIO_H
 
+#include "common/hercules.h"
+
+/** @file
+ * GRF I/O library.
+ */
+
+/// The GRF I/O interface.
+struct grfio_interface {
+	/**
+	 * Interface initialization.
+	 *
+	 * @param fname Name of the configuration file.
+	 */
+	void (*init) (const char *fname);
+
+	/// Interface finalization.
+	void (*final) (void);
+
+	/**
+	 * Reads a file into a newly allocated buffer (from grf or data directory).
+	 *
+	 * @param[in]  fname Name of the file to read.
+	 * @param[out] size  Buffer to return the size of the read file (optional).
+	 * @return The file data.
+	 * @retval NULL in case of error.
+	 */
+	void *(*reads) (const char *fname, int *size);
+
+	/**
+	 * Finds a file in the grf or data directory
+	 *
+	 * @param fname The file to find.
+	 * @return The original file name.
+	 * @retval NULL if the file wasn't found.
+	 */
+	const char *(*find_file) (const char *fname);
+
+	/**
+	 * Calculates a CRC32 hash.
+	 *
+	 * @param buf The data to hash.
+	 * @param len Data length.
+	 *
+	 * @return The CRC32 hash.
+	 */
+	unsigned long (*crc32) (const unsigned char *buf, unsigned int len);
+
+	/**
+	 * Decompresses ZIP data.
+	 *
+	 * Decompresses the source buffer into the destination buffer.
+	 * source_len is the byte length of the source buffer.  Upon entry,
+	 * dest_len is the total size of the destination buffer, which must be
+	 * large enough to hold the entire uncompressed data.  (The size of the
+	 * uncompressed data must have been saved previously by the compressor
+	 * and transmitted to the decompressor by some mechanism outside the
+	 * scope of this compression library.) Upon exit, dest_len is the
+	 * actual size of the uncompressed buffer.
+	 *
+	 * @param[in,out] dest       The destination (uncompressed) buffer.
+	 * @param[in,out] dest_len   Max length of the destination buffer, returns length of the decompressed data.
+	 * @param[in]     source     The source (compressed) buffer.
+	 * @param[in]     source_len Source data length.
+	 * @return error code.
+	 * @retval Z_OK in case of success.
+	 */
+	int (*decode_zip) (void *dest, unsigned long *dest_len, const void *source, unsigned long source_len);
+
+	/**
+	 * Compresses data to ZIP format.
+	 *
+	 * Compresses the source buffer into the destination buffer.
+	 * source_len is the byte length of the source buffer.  Upon entry,
+	 * dest_len is the total size of the destination buffer, which must be
+	 * at least the value returned by compressBound(source_len).  Upon
+	 * exit, dest_len is the actual size of the compressed buffer.
+	 *
+	 * @param[in,out] dest       The destination (compressed) buffer (if NULL, a new buffer will be created).
+	 * @param[in,out] dest_len   Max length of the destination buffer (if 0, it will be calculated).
+	 * @param[in]     source     The source (uncompressed) buffer.
+	 * @param[in]     source_len Source data length.
+	 */
+	int (*encode_zip) (void *dest, unsigned long *dest_len, const void *source, unsigned long source_len);
+};
+
+/**
+ * Reads a file into a newly allocated buffer (from grf or data directory)
+ *
+ * @param fn The filename to read.
+ *
+ * @see grfio_interface::reads()
+ * @related grfio_interface
+ */
+#define grfio_read(fn) grfio->reads((fn), NULL)
+
 #ifdef HERCULES_CORE
-void grfio_init(const char* fname);
-void grfio_final(void);
-void* grfio_reads(const char* fname, int* size);
-char* grfio_find_file(const char* fname);
-#define grfio_read(fn) grfio_reads((fn), NULL)
-
-unsigned long grfio_crc32(const unsigned char *buf, unsigned int len);
-int decode_zip(void* dest, unsigned long* destLen, const void* source, unsigned long sourceLen);
-int encode_zip(void* dest, unsigned long* destLen, const void* source, unsigned long sourceLen);
+void grfio_defaults(void);
 #endif // HERCULES_CORE
 
+HPShared struct grfio_interface *grfio; ///< Pointer to the grfio interface.
 #endif /* COMMON_GRFIO_H */