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/* xdelta3 - delta compression tools and library
* Copyright (C) 2011, 2012 Joshua P. MacDonald
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef XDELTA3_INTERNAL_H__
#define XDELTA3_INTERNAL_H__
#include <stdio.h>
#include <stdarg.h>
#ifndef _XDELTA3_INTERNAL_H_
#define _XDELTA3_INTERNAL_H_
typedef struct _main_file main_file;
typedef struct _main_extcomp main_extcomp;
void main_file_init (main_file *xfile);
int main_file_close (main_file *xfile);
void main_file_cleanup (main_file *xfile);
int main_file_isopen (main_file *xfile);
int main_file_open (main_file *xfile, const char* name, int mode);
int main_file_exists (main_file *xfile);
int xd3_whole_append_window (xd3_stream *stream);
int xd3_main_cmdline (int argc, char **argv);
int main_file_read (main_file *ifile,
uint8_t *buf,
usize_t size,
usize_t *nread,
const char *msg);
int main_file_write (main_file *ofile, uint8_t *buf,
usize_t size, const char *msg);
usize_t xd3_bytes_on_srcblk (xd3_source *src, xoff_t blkno);
xoff_t xd3_source_eof(const xd3_source *src);
uint32_t xd3_large_cksum_update (uint32_t cksum,
const uint8_t *base,
usize_t look);
int xd3_encode_init_full (xd3_stream *stream);
#if PYTHON_MODULE || SWIG_MODULE || NOT_MAIN
int xd3_main_cmdline (int argc, char **argv);
#endif
/* main_file->mode values */
typedef enum
{
XO_READ = 0,
XO_WRITE = 1
} main_file_modes;
struct _main_file
{
#if XD3_STDIO
FILE *file;
#elif XD3_POSIX
int file;
#elif XD3_WIN32
HANDLE file;
#endif
int mode; /* XO_READ and XO_WRITE */
const char *filename; /* File name or /dev/stdin,
* /dev/stdout, /dev/stderr. */
char *filename_copy; /* File name or /dev/stdin,
* /dev/stdout, /dev/stderr. */
const char *realname; /* File name or /dev/stdin,
* /dev/stdout, /dev/stderr. */
const main_extcomp *compressor; /* External compression struct. */
int flags; /* RD_FIRST, RD_NONEXTERNAL, ... */
xoff_t nread; /* for input position */
xoff_t nwrite; /* for output position */
uint8_t *snprintf_buf; /* internal snprintf() use */
int size_known; /* Set by main_set_souze */
xoff_t source_position; /* for avoiding seek in getblk_func */
int seek_failed; /* after seek fails once, try FIFO */
};
/* According to the internet, Windows vsnprintf() differs from most
* Unix implementations regarding the terminating 0 when the boundary
* condition is met. It doesn't matter here, we don't rely on the
* trailing 0. Besides, both Windows and DJGPP vsnprintf return -1
* upon truncation, which isn't C99 compliant. To overcome this,
* recent MinGW runtimes provided their own vsnprintf (notice the
* absence of the '_' prefix) but they were initially buggy. So,
* always use the native '_'-prefixed version with Win32. */
#ifdef _WIN32
#define vsnprintf_func _vsnprintf
#else
#define vsnprintf_func vsnprintf
#endif
/* Prior to SVN 303 this function was only defined in DJGPP and WIN32
* environments and other platforms would use the builtin snprintf()
* with an arrangement of macros below. In OS X 10.6, Apply made
* snprintf() a macro, which defeated those macros (since snprintf
* would be evaluated before its argument macros were expanded,
* therefore always define xsnprintf_func. */
#undef PRINTF_ATTRIBUTE
#ifdef __GNUC__
/* Let's just assume no one uses gcc 2.x! */
#define PRINTF_ATTRIBUTE(x,y) __attribute__ ((__format__ (__printf__, x, y)))
#else
#define PRINTF_ATTRIBUTE(x,y)
#endif
/* Underlying xprintf() */
int xsnprintf_func (char *str, int n, const char *fmt, ...)
PRINTF_ATTRIBUTE(3,4);
/* XPR(NT "", ...) (used by main) prefixes an "xdelta3: " to the output. */
void xprintf(const char *fmt, ...) PRINTF_ATTRIBUTE(1,2);
#define XPR xprintf
#define NT "xdelta3: "
#define NTR ""
#endif
#endif // XDELTA3_INTERNAL_H__
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