compression_wrapper.h

/* createrepo_c - Library of routines for manipulation with repodata
 * Copyright (C) 2012  Tomas Mlcoch
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 */

#ifndef __C_CREATEREPOLIB_COMPRESSION_WRAPPER_H__
#define __C_CREATEREPOLIB_COMPRESSION_WRAPPER_H__

#ifdef __cplusplus
extern "C" {
#endif

#include <glib.h>
#include "checksum.h"

typedef enum {
    CR_CW_AUTO_DETECT_COMPRESSION,    
    CR_CW_UNKNOWN_COMPRESSION,        
    CR_CW_NO_COMPRESSION,             
    CR_CW_GZ_COMPRESSION,             
    CR_CW_BZ2_COMPRESSION,            
    CR_CW_XZ_COMPRESSION,             
    CR_CW_ZCK_COMPRESSION,            
    CR_CW_ZSTD_COMPRESSION,           
    CR_CW_COMPRESSION_SENTINEL,       
} cr_CompressionType;

/* Default compression method (configurable at build time) */
#ifndef CR_DEFAULT_COMPRESSION
#define CR_DEFAULT_COMPRESSION CR_CW_ZSTD_COMPRESSION
#endif

typedef enum {
    CR_CW_MODE_READ,            
    CR_CW_MODE_WRITE,           
    CR_CW_MODE_SENTINEL,        
} cr_OpenMode;

typedef struct {
    gint64          size;               
    cr_ChecksumType checksum_type;      
    char            *checksum;          
    gint64          hdr_size;           
    cr_ChecksumType hdr_checksum_type;  
    char            *hdr_checksum;      
} cr_ContentStat;

cr_ContentStat *cr_contentstat_new(cr_ChecksumType type, GError **err);

void cr_contentstat_free(cr_ContentStat *cstat, GError **err);

typedef struct {
    cr_CompressionType  type;           
    void                *FILE;          
    void                *INNERFILE;     
    cr_OpenMode         mode;           
    cr_ContentStat      *stat;          
    cr_ChecksumCtx      *checksum_ctx;  
} CR_FILE;

#define CR_CW_ERR       -1      
const char *cr_compression_suffix(cr_CompressionType comtype);

cr_CompressionType cr_detect_compression(const char* filename, GError **err);

cr_CompressionType cr_compression_type(const char *name);

#define cr_open(FILENAME, MODE, COMTYPE, ERR) \
                    cr_sopen(FILENAME, MODE, COMTYPE, NULL, ERR)

CR_FILE *cr_sopen(const char *filename,
                  cr_OpenMode mode,
                  cr_CompressionType comtype,
                  cr_ContentStat *stat,
                  GError **err);

int cr_set_dict(CR_FILE *cr_file, const void *dict, unsigned int len, GError **err);

int cr_read(CR_FILE *cr_file, void *buffer, unsigned int len, GError **err);

int cr_write(CR_FILE *cr_file,
             const void *buffer,
             unsigned int len,
             GError **err);

int cr_puts(CR_FILE *cr_file, const char *str, GError **err);

int cr_end_chunk(CR_FILE *cr_file, GError **err);

int cr_set_autochunk(CR_FILE *cr_file, gboolean auto_chunk, GError **err);

ssize_t cr_get_zchunk_with_index(CR_FILE *f, ssize_t zchunk_index, char **copy_buf, GError **err);

int cr_printf(GError **err, CR_FILE *cr_file, const char *format, ...);

int cr_close(CR_FILE *cr_file, GError **err);

#ifdef __cplusplus
}
#endif

#endif /* __C_CREATEREPOLIB_COMPRESSION_WRAPPER_H__ */