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/**
* @file chunk.h
*
* @brief Pointer/lenght abstraction and its functions.
*
*/
/*
* Copyright (C) 2005-2006 Martin Willi
* Copyright (C) 2005 Jan Hutter
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef CHUNK_H_
#define CHUNK_H_
#include <string.h>
#include <stdarg.h>
#include <library.h>
typedef struct chunk_t chunk_t;
/**
* General purpose pointer/length abstraction.
*/
struct chunk_t {
/** Pointer to start of data */
u_char *ptr;
/** Length of data in bytes */
size_t len;
};
/**
* A { NULL, 0 }-chunk handy for initialization.
*/
extern chunk_t chunk_empty;
/**
* Initialize a chunk to point to a static(!) buffer
*/
#define chunk_from_buf(str) { str, sizeof(str) }
/**
* Clone chunk contents in a newly allocated chunk
*/
chunk_t chunk_clone(chunk_t chunk);
/**
* Allocate a chunk from concatenation of other chunks.
* mode is a string 'm' and 'c, 'm' means move chunk,
* 'c' means copy chunk.
*/
chunk_t chunk_cat(const char* mode, ...);
/**
* Free contents of a chunk
*/
void chunk_free(chunk_t *chunk);
/**
* Allocate a chunk
*/
chunk_t chunk_alloc(size_t bytes);
/**
* Compare two chunks for equality,
* NULL chunks are never equal.
*/
bool chunk_equals(chunk_t a, chunk_t b);
/**
* Compare two chunks for equality,
* NULL chunks are always equal.
*/
bool chunk_equals_or_null(chunk_t a, chunk_t b);
#endif /* CHUNK_H_ */
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