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/*
* zipio.h - stdio emulation library for reading zip files
*
* Version 1.1.2
*/
/*
* Copyright (C) 1995, Edward B. Hamrick
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear in
* supporting documentation, and that the name of the copyright holders
* not be used in advertising or publicity pertaining to distribution of
* the software without specific, written prior permission. The copyright
* holders makes no representations about the suitability of this software
* for any purpose. It is provided "as is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
* SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
* IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT
* OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF
* USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
/*
* Changes from 1.1 to 1.1.1:
* Changed "z*" functions to "Z*" to avoid namespace pollution.
* Added "zungetc" macro.
* John Cowan <cowan@ccil.org>
*
* Changes from 1.1.1 to 1.1.2:
* Relicensed under the MIT license, with consent of the copyright holders.
* Claudio Matsuoka (Jan 11 2011)
*/
/*
* This library of routines has the same calling sequence as
* the stdio.h routines for reading files. If these routines
* detect that they are reading from a zip file, they transparently
* unzip the file and make the application think they're reading
* from the uncompressed file.
*
* Note that this library is designed to work for zip files that
* use the deflate compression method, and to read the first file
* within the zip archive.
*
* There are a number of tunable parameters in the reference
* implementation relating to in-memory decompression and the
* use of temporary files.
*
* Particular care was taken to make the Zgetc() macro work
* as efficiently as possible. When reading an uncompressed
* file with Zgetc(), it has exactly the same performance as
* when using getc(). WHen reading a compressed file with
* Zgetc(), it has the same performance as fread(). The total
* CPU overhead for decompression is about 50 cycles per byte.
*
* The Zungetc() macro is quite limited. It ignores the character
* specified for pushback, and essentially just forces the last
* character read to be re-read. This is essential when parsing
* numbers and such. (1.1.1)
*
* There are a few stdio routines that aren't represented here, but
* they can be layered on top of these routines if needed.
*/
#ifndef __ZIPIO_H
#define __ZIPIO_H
#include <stdio.h>
typedef struct {
int len;
unsigned char *ptr;
} ZFILE;
#define Zgetc(f) \
((--((f)->len) >= 0) \
? (unsigned char)(*(f)->ptr++) \
: _Zgetc (f))
#define Zungetc(c,f) \
((f)->ptr--, (f)->len++, (c))
#ifdef __cplusplus
extern "C" {
#endif
ZFILE *Zopen(const char *path, const char *mode);
int _Zgetc(ZFILE *stream);
size_t Zread(void *ptr, size_t size, size_t n, ZFILE *stream);
int Zseek(ZFILE *stream, long offset, int whence);
long Ztell(ZFILE *stream);
int Zclose(ZFILE *stream);
#ifdef __cplusplus
}
#endif
#endif
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