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/*
* Copyright (c) 2017 rxi
* Copyright (c) 2021 Aidan MacDonald
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#ifndef MICROTAR_H
#define MICROTAR_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdio.h> /* SEEK_SET et al. */
enum mtar_error {
MTAR_ESUCCESS = 0,
MTAR_EFAILURE = -1,
MTAR_EOPENFAIL = -2,
MTAR_EREADFAIL = -3,
MTAR_EWRITEFAIL = -4,
MTAR_ESEEKFAIL = -5,
MTAR_ESEEKRANGE = -6,
MTAR_EBADCHKSUM = -7,
MTAR_ENULLRECORD = -8,
MTAR_ENOTFOUND = -9,
MTAR_EOVERFLOW = -10,
MTAR_EAPI = -11,
MTAR_ENAMETOOLONG = -12,
MTAR_EWRONGSIZE = -13,
MTAR_EACCESS = -14,
};
enum mtar_type {
MTAR_TREG = '0',
MTAR_TLNK = '1',
MTAR_TSYM = '2',
MTAR_TCHR = '3',
MTAR_TBLK = '4',
MTAR_TDIR = '5',
MTAR_TFIFO = '6',
};
enum mtar_access {
MTAR_READ,
MTAR_WRITE,
};
typedef struct mtar_header mtar_header_t;
typedef struct mtar mtar_t;
typedef struct mtar_ops mtar_ops_t;
typedef int(*mtar_foreach_cb)(mtar_t*, const mtar_header_t*, void*);
struct mtar_header {
unsigned mode;
unsigned owner;
unsigned group;
unsigned size;
unsigned mtime;
unsigned type;
char name[101]; /* +1 byte in order to ensure null termination */
char linkname[101];
};
struct mtar_ops {
int(*read)(void* stream, void* data, unsigned size);
int(*write)(void* stream, const void* data, unsigned size);
int(*seek)(void* stream, unsigned pos);
int(*close)(void* stream);
};
struct mtar {
char buffer[512]; /* IO buffer, put first to allow library users to
* control its alignment */
int state; /* Used to simplify the API and verify API usage */
int access; /* Access mode */
unsigned pos; /* Current position in file */
unsigned end_pos; /* End position of the current file */
unsigned header_pos; /* Position of the current header */
mtar_header_t header; /* Most recently parsed header */
const mtar_ops_t* ops; /* Stream operations */
void* stream; /* Stream handle */
};
const char* mtar_strerror(int err);
void mtar_init(mtar_t* tar, int access, const mtar_ops_t* ops, void* stream);
int mtar_close(mtar_t* tar);
int mtar_is_open(mtar_t* tar);
mtar_header_t* mtar_get_header(mtar_t* tar);
int mtar_access_mode(const mtar_t* tar);
int mtar_rewind(mtar_t* tar);
int mtar_next(mtar_t* tar);
int mtar_foreach(mtar_t* tar, mtar_foreach_cb cb, void* arg);
int mtar_find(mtar_t* tar, const char* name);
int mtar_read_data(mtar_t* tar, void* ptr, unsigned size);
int mtar_seek_data(mtar_t* tar, int offset, int whence);
unsigned mtar_tell_data(mtar_t* tar);
int mtar_eof_data(mtar_t* tar);
int mtar_write_header(mtar_t* tar, const mtar_header_t* h);
int mtar_update_header(mtar_t* tar, const mtar_header_t* h);
int mtar_write_file_header(mtar_t* tar, const char* name, unsigned size);
int mtar_write_dir_header(mtar_t* tar, const char* name);
int mtar_write_data(mtar_t* tar, const void* ptr, unsigned size);
int mtar_update_file_size(mtar_t* tar);
int mtar_end_data(mtar_t* tar);
int mtar_finalize(mtar_t* tar);
#ifdef __cplusplus
}
#endif
#endif
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