api.c

zip压缩

/*
  Copyright (c) 1990-2001 Info-ZIP.  All rights reserved.

  See the accompanying file LICENSE, version 2000-Apr-09 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
*/
/*---------------------------------------------------------------------------

  api.c

  This module supplies an UnZip engine for use directly from C/C++
  programs.  The functions are:

    UzpVer *UzpVersion(void);
    void UzpVersion2(UzpVer2 *version)
    int UzpMain(int argc, char *argv[]);
    int UzpAltMain(int argc, char *argv[], UzpInit *init);
    int UzpValidate(char *archive, int AllCodes);
    void UzpFreeMemBuffer(UzpBuffer *retstr);
    int UzpUnzipToMemory(char *zip, char *file, UzpOpts *optflgs,
                         UzpCB *UsrFuncts, UzpBuffer *retstr);

  non-WINDLL only (a special WINDLL variant is defined in windll/windll.c):
    int UzpGrep(char *archive, char *file, char *pattern, int cmd, int SkipBin,
                UzpCB *UsrFuncts);

  OS/2 only (for now):
    int UzpFileTree(char *name, cbList(callBack), char *cpInclude[],
          char *cpExclude[]);

  You must define `DLL' in order to include the API extensions.

  ---------------------------------------------------------------------------*/


#ifdef OS2
#  define  INCL_DOSMEMMGR
#  include <os2.h>
#endif
#include <setjmp.h>

#define UNZIP_INTERNAL
#include "unzip.h"
#ifdef WINDLL
#  include "windll/windll.h"
#endif
#include "unzvers.h"

#ifdef DLL      /* This source file supplies DLL-only interface code. */

jmp_buf dll_error_return;

/*---------------------------------------------------------------------------
    Documented API entry points
  ---------------------------------------------------------------------------*/


UzpVer * UZ_EXP UzpVersion()   /* should be pointer to const struct */
{
    static UzpVer version;     /* doesn't change between calls */


    version.structlen = UZPVER_LEN;

#ifdef BETA
    version.flag = 1;
#else
    version.flag = 0;
#endif
    version.betalevel = UZ_BETALEVEL;
    version.date = UZ_VERSION_DATE;

#ifdef ZLIB_VERSION
    version.zlib_version = ZLIB_VERSION;
    version.flag |= 2;
#else
    version.zlib_version = NULL;
#endif

    /* someday each of these may have a separate patchlevel: */
    version.unzip.major = UZ_MAJORVER;
    version.unzip.minor = UZ_MINORVER;
    version.unzip.patchlevel = UZ_PATCHLEVEL;

    version.zipinfo.major = ZI_MAJORVER;
    version.zipinfo.minor = ZI_MINORVER;
    version.zipinfo.patchlevel = UZ_PATCHLEVEL;

    /* these are retained for backward compatibility only: */
    version.os2dll.major = UZ_MAJORVER;
    version.os2dll.minor = UZ_MINORVER;
    version.os2dll.patchlevel = UZ_PATCHLEVEL;

    version.windll.major = UZ_MAJORVER;
    version.windll.minor = UZ_MINORVER;
    version.windll.patchlevel = UZ_PATCHLEVEL;

    return &version;
}

void UZ_EXP UzpVersion2(UzpVer2 *version)
{

    version->structlen = UZPVER_LEN;

#ifdef BETA
    version->flag = 1;
#else
    version->flag = 0;
#endif
    strcpy(version->betalevel, UZ_BETALEVEL);
    strcpy(version->date, UZ_VERSION_DATE);

#ifdef ZLIB_VERSION
    strcpy(version->zlib_version, ZLIB_VERSION);
    version->flag |= 2;
#else
    version->zlib_version[0] = '\0';
#endif

    /* someday each of these may have a separate patchlevel: */
    version->unzip.major = UZ_MAJORVER;
    version->unzip.minor = UZ_MINORVER;
    version->unzip.patchlevel = UZ_PATCHLEVEL;

    version->zipinfo.major = ZI_MAJORVER;
    version->zipinfo.minor = ZI_MINORVER;
    version->zipinfo.patchlevel = UZ_PATCHLEVEL;

    /* these are retained for backward compatibility only: */
    version->os2dll.major = UZ_MAJORVER;
    version->os2dll.minor = UZ_MINORVER;
    version->os2dll.patchlevel = UZ_PATCHLEVEL;

    version->windll.major = UZ_MAJORVER;
    version->windll.minor = UZ_MINORVER;
    version->windll.patchlevel = UZ_PATCHLEVEL;
}





#ifndef WINDLL

int UZ_EXP UzpAltMain(int argc, char *argv[], UzpInit *init)
{
    int r, (*dummyfn)();


    CONSTRUCTGLOBALS();

    if (init->structlen >= (sizeof(ulg) + sizeof(dummyfn)) && init->msgfn)
        G.message = init->msgfn;

    if (init->structlen >= (sizeof(ulg) + 2*sizeof(dummyfn)) && init->inputfn)
        G.input = init->inputfn;

    if (init->structlen >= (sizeof(ulg) + 3*sizeof(dummyfn)) && init->pausefn)
        G.mpause = init->pausefn;

    if (init->structlen >= (sizeof(ulg) + 4*sizeof(dummyfn)) && init->userfn)
        (*init->userfn)();    /* allow void* arg? */

    r = unzip(__G__ argc, argv);
    DESTROYGLOBALS();
    RETURN(r);
}

#endif /* !WINDLL */




#ifndef __16BIT__

void UZ_EXP UzpFreeMemBuffer(UzpBuffer *retstr)
{
    if (retstr->strptr != NULL) {
        free(retstr->strptr);
        retstr->strptr = NULL;
    }
}




#ifndef WINDLL

static int UzpDLL_Init OF((zvoid *pG, UzpCB *UsrFuncts));

static int UzpDLL_Init(pG, UsrFuncts)
zvoid *pG;
UzpCB *UsrFuncts;
{
    int (*dummyfn)();

    if (UsrFuncts->structlen >= (sizeof(ulg) + sizeof(dummyfn)) &&
        UsrFuncts->msgfn)
        ((Uz_Globs *)pG)->message = UsrFuncts->msgfn;
    else
        return FALSE;

    if (UsrFuncts->structlen >= (sizeof(ulg) + 2*sizeof(dummyfn)) &&
        UsrFuncts->inputfn)
        ((Uz_Globs *)pG)->input = UsrFuncts->inputfn;

    if (UsrFuncts->structlen >= (sizeof(ulg) + 3*sizeof(dummyfn)) &&
        UsrFuncts->pausefn)
        ((Uz_Globs *)pG)->mpause = UsrFuncts->pausefn;

    if (UsrFuncts->structlen >= (sizeof(ulg) + 4*sizeof(dummyfn)) &&
        UsrFuncts->passwdfn)
        ((Uz_Globs *)pG)->decr_passwd = UsrFuncts->passwdfn;

    if (UsrFuncts->structlen >= (sizeof(ulg) + 5*sizeof(dummyfn)) &&
        UsrFuncts->statrepfn)
        ((Uz_Globs *)pG)->statreportcb = UsrFuncts->statrepfn;

    return TRUE;
}


int UZ_EXP UzpUnzipToMemory(char *zip, char *file, UzpOpts *optflgs,
    UzpCB *UsrFuncts, UzpBuffer *retstr)
{
    int r;
#if (defined(WINDLL) && !defined(CRTL_CP_IS_ISO))
    char *intern_zip, *intern_file;
#endif

    CONSTRUCTGLOBALS();
#if (defined(WINDLL) && !defined(CRTL_CP_IS_ISO))
    intern_zip = (char *)malloc(strlen(zip)+1);
    if (intern_zip == NULL) {
       DESTROYGLOBALS();
       return PK_MEM;
    }
    intern_file = (char *)malloc(strlen(file)+1);
    if (intern_file == NULL) {
       DESTROYGLOBALS();
       free(intern_zip);
       return PK_MEM;
    }
    ISO_TO_INTERN(zip, intern_zip);
    ISO_TO_INTERN(file, intern_file);
#   define zip intern_zip
#   define file intern_file
#endif
    /* Copy those options that are meaningful for UzpUnzipToMemory, instead of
     * a simple "memcpy(G.UzO, optflgs, sizeof(UzpOpts));"
     */
    uO.pwdarg = optflgs->pwdarg;
    uO.aflag = optflgs->aflag;
    uO.C_flag = optflgs->C_flag;
    uO.qflag = optflgs->qflag;  /* currently,  overridden in unzipToMemory */

    if (!UzpDLL_Init((zvoid *)&G, UsrFuncts)) {
       DESTROYGLOBALS();
       return PK_BADERR;
    }
    G.redirect_data = 1;

    r = (unzipToMemory(__G__ zip, file, retstr) <= PK_WARN);

    DESTROYGLOBALS();
#if (defined(WINDLL) && !defined(CRTL_CP_IS_ISO))
#  undef file
#  undef zip
    free(intern_file);
    free(intern_zip);
#endif
    if (!r && retstr->strlength) {
       free(retstr->strptr);
       retstr->strptr = NULL;
    }
    return r;
}
#endif /* !WINDLL */
#endif /* !__16BIT__ */





#ifdef OS2DLL

int UZ_EXP UzpFileTree(char *name, cbList(callBack), char *cpInclude[],
                char *cpExclude[])
{
    int r;

    CONSTRUCTGLOBALS();
    uO.qflag = 2;
    uO.vflag = 1;
    uO.C_flag = 1;
    G.wildzipfn = name;
    G.process_all_files = TRUE;
    if (cpInclude) {
        char **ptr = cpInclude;

        while (*ptr != NULL) ptr++;
        G.filespecs = ptr - cpInclude;
        G.pfnames = cpInclude, G.process_all_files = FALSE;