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/* data_buf.h --
* Copyright 2007 Red Hat Inc., Durham, North Carolina.
* All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Authors:
* John Dennis <jdennis@redhat.com>
*/
#ifndef DATA_BUF_HEADER
#define DATA_BUF_HEADER
/*****************************************************************************/
/******************************* Include Files *******************************/
/*****************************************************************************/
#include "config.h"
#include "private.h"
/*****************************************************************************/
/*********************************** Defines *********************************/
/*****************************************************************************/
#define DATABUF_FLAG_PRESERVE_HEAD (1 << 0)
#define DATABUF_FLAG_STRING (2 << 0)
/*****************************************************************************/
/******************************* Type Definitions ****************************/
/*****************************************************************************/
typedef struct Databuf {
unsigned flags;
size_t alloc_size;
char *alloc_ptr;
size_t offset;
size_t len;
size_t max_len;
} DataBuf;
/*****************************************************************************/
/************************* External Global Variables ***********************/
/*****************************************************************************/
/*****************************************************************************/
/***************************** Inline Functions ****************************/
/*****************************************************************************/
static inline char *databuf_beg(DataBuf *db)
{return (db->alloc_ptr == NULL) ? NULL : db->alloc_ptr+db->offset;}
static inline char *databuf_end(DataBuf *db)
{return (db->alloc_ptr == NULL) ? NULL : db->alloc_ptr+db->offset+db->len;}
static inline char *databuf_alloc_end(DataBuf *db)
{return (db->alloc_ptr == NULL) ? NULL : db->alloc_ptr+db->alloc_size;}
static inline int databuf_tail_size(DataBuf *db)
{return db->alloc_size - (db->offset+db->len);}
static inline int databuf_tail_available(DataBuf *db, size_t append_len)
{return append_len <= databuf_tail_size(db);}
static inline size_t databuf_free_size(DataBuf *db)
{return db->alloc_size-db->len;}
/*****************************************************************************/
/**************************** Exported Functions ***************************/
/*****************************************************************************/
void databuf_print(DataBuf *db, int print_data, char *fmt, ...) hidden;
int databuf_init(DataBuf *db, size_t size, unsigned flags) hidden;
void databuf_free(DataBuf *db) hidden;
char *databuf_export(DataBuf *db) hidden;
int databuf_append(DataBuf *db, const char *src, size_t src_size) hidden;
int databuf_strcat(DataBuf *db, const char *str) hidden;
int databuf_advance(DataBuf *db, size_t advance) hidden;
int databuf_compress(DataBuf *db) hidden;
int databuf_reset(DataBuf *db) hidden;
#endif
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