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unzipstb.c
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unzipstb.c
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/*
Copyright (c) 1990-2009 Info-ZIP. All rights reserved.
See the accompanying file LICENSE, version 2009-Jan-02 or later
(the contents of which are also included in unzip.h) for terms of use.
If, for some reason, all these files are missing, the Info-ZIP license
also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
*/
/*---------------------------------------------------------------------------
unzipstb.c
Simple stub function for UnZip DLL (or shared library, whatever); does
exactly the same thing as normal UnZip, except for additional printf()s
of various version numbers, solely as a demonstration of what can/should
be checked when using the DLL. (If major version numbers ever differ,
assume program is incompatible with DLL--especially if DLL version is
older. This is not likely to be a problem with *this* simple program,
but most user programs will be much more complex.)
---------------------------------------------------------------------------*/
#include <stdio.h>
#include "unzip.h"
#if defined(MODERN) && !defined(NO_STDDEF_H)
# include <stddef.h>
#endif
#include "unzvers.h"
int main(int argc, char *argv[])
{
static ZCONST UzpVer *pVersion; /* no pervert jokes, please... */
pVersion = UzpVersion();
printf("UnZip stub: checking version numbers (DLL is dated %s)\n",
pVersion->date);
printf(" UnZip versions: expecting %u.%u%u, using %u.%u%u%s\n",
UZ_MAJORVER, UZ_MINORVER, UZ_PATCHLEVEL, pVersion->unzip.major,
pVersion->unzip.minor, pVersion->unzip.patchlevel, pVersion->betalevel);
printf(" ZipInfo versions: expecting %u.%u%u, using %u.%u%u\n",
ZI_MAJORVER, ZI_MINORVER, UZ_PATCHLEVEL, pVersion->zipinfo.major,
pVersion->zipinfo.minor, pVersion->zipinfo.patchlevel);
/*
D2_M*VER and os2dll.* are obsolete, though retained for compatibility:
printf(" OS2 DLL versions: expecting %u.%u%u, using %u.%u%u\n",
D2_MAJORVER, D2_MINORVER, D2_PATCHLEVEL, pVersion->os2dll.major,
pVersion->os2dll.minor, pVersion->os2dll.patchlevel);
*/
if (pVersion->flag & 2)
printf(" using zlib version %s\n", pVersion->zlib_version);
/* This example code only uses the dll calls UzpVersion() and
* UzpMain(). The APIs for these two calls have maintained backward
* compatibility since at least the UnZip release 5.3 !
*/
# define UZDLL_MINVERS_MAJOR 5
# define UZDLL_MINVERS_MINOR 3
# define UZDLL_MINVERS_PATCHLEVEL 0
/* This UnZip DLL stub requires a DLL version of at least: */
if ( (pVersion->unzip.major < UZDLL_MINVERS_MAJOR) ||
((pVersion->unzip.major == UZDLL_MINVERS_MAJOR) &&
((pVersion->unzip.minor < UZDLL_MINVERS_MINOR) ||
((pVersion->unzip.minor == UZDLL_MINVERS_MINOR) &&
(pVersion->unzip.patchlevel < UZDLL_MINVERS_PATCHLEVEL)
)
)
) )
{
printf(" aborting because of too old UnZip DLL version!\n");
return -1;
}
/* In case the offsetof() macro is not supported by some C compiler
environment, it might be replaced by something like:
((extent)(void *)&(((UzpVer *)0)->dllapimin))
*/
if (pVersion->structlen >=
#if defined(MODERN) && !defined(NO_STDDEF_H)
( offsetof(UzpVer, dllapimin)
#else
((unsigned)&(((UzpVer *)0)->dllapimin))
#endif
+ sizeof(_version_type) ))
{
#ifdef OS2DLL
# define UZ_API_COMP_MAJOR UZ_OS2API_COMP_MAJOR
# define UZ_API_COMP_MINOR UZ_OS2API_COMP_MINOR
# define UZ_API_COMP_REVIS UZ_OS2API_COMP_REVIS
#else /* !OS2DLL */
#ifdef WINDLL
# define UZ_API_COMP_MAJOR UZ_WINAPI_COMP_MAJOR
# define UZ_API_COMP_MINOR UZ_WINAPI_COMP_MINOR
# define UZ_API_COMP_REVIS UZ_WINAPI_COMP_REVIS
#else /* !WINDLL */
# define UZ_API_COMP_MAJOR UZ_GENAPI_COMP_MAJOR
# define UZ_API_COMP_MINOR UZ_GENAPI_COMP_MINOR
# define UZ_API_COMP_REVIS UZ_GENAPI_COMP_REVIS
#endif /* ?WINDLL */
#endif /* ?OS2DLL */
printf(
" UnZip API version: can handle <= %u.%u%u, DLL supplies %u.%u%u\n",
UZ_API_COMP_MAJOR, UZ_API_COMP_MINOR, UZ_API_COMP_REVIS,
pVersion->dllapimin.major, pVersion->dllapimin.minor,
pVersion->dllapimin.patchlevel);
if ( (pVersion->dllapimin.major > UZ_API_COMP_MAJOR) ||
((pVersion->dllapimin.major == UZ_API_COMP_MAJOR) &&
((pVersion->dllapimin.minor > UZ_API_COMP_MINOR) ||
((pVersion->dllapimin.minor == UZ_API_COMP_MINOR) &&
(pVersion->dllapimin.patchlevel > UZ_API_COMP_REVIS)
)
)
) )
{
printf(" aborting because of unsupported dll api version!\n");
return -1;
}
}
printf("\n");
/* call the actual UnZip routine (string-arguments version) */
return UzpMain(argc, argv);
}