223 lines
6.3 KiB
C
223 lines
6.3 KiB
C
/*
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Copyright (c) 1990-2007 Info-ZIP. All rights reserved.
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See the accompanying file LICENSE, version 2003-May-08 or later
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(the contents of which are also included in unzip.h) for terms of use.
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If, for some reason, all these files are missing, the Info-ZIP license
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also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html
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*/
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/*---------------------------------------------------------------------------
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globals.c
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Routines to allocate and initialize globals, with or without threads.
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Contents: registerGlobalPointer()
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deregisterGlobalPointer()
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getGlobalPointer()
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globalsCtor()
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---------------------------------------------------------------------------*/
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#define UNZIP_INTERNAL
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#include "unzip.h"
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#ifndef FUNZIP
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/* initialization of sigs is completed at runtime so unzip(sfx) executable
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* won't look like a zipfile
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*/
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char central_hdr_sig[4] = {0, 0, 0x01, 0x02};
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char local_hdr_sig[4] = {0, 0, 0x03, 0x04};
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char end_central_sig[4] = {0, 0, 0x05, 0x06};
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char end_central64_sig[4] = {0, 0, 0x06, 0x06};
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char end_centloc64_sig[4] = {0, 0, 0x06, 0x07};
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/* extern char extd_local_sig[4] = {0, 0, 0x07, 0x08}; NOT USED YET */
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ZCONST char *fnames[2] = {"*", NULL}; /* default filenames vector */
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#endif
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#ifndef REENTRANT
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Uz_Globs G;
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#else /* REENTRANT */
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# ifndef USETHREADID
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Uz_Globs *GG;
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# else /* USETHREADID */
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# define THREADID_ENTRIES 0x40
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int lastScan;
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Uz_Globs *threadPtrTable[THREADID_ENTRIES];
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ulg threadIdTable [THREADID_ENTRIES] = {
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0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0,
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0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, /* Make sure there are */
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0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0, /* THREADID_ENTRIES 0s */
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0,0,0,0, 0,0,0,0, 0,0,0,0, 0,0,0,0
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};
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static ZCONST char Far TooManyThreads[] =
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"error: more than %d simultaneous threads.\n\
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Some threads are probably not calling DESTROYTHREAD()\n";
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static ZCONST char Far EntryNotFound[] =
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"error: couldn't find global pointer in table.\n\
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Maybe somebody accidentally called DESTROYTHREAD() twice.\n";
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static ZCONST char Far GlobalPointerMismatch[] =
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"error: global pointer in table does not match pointer passed as\
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parameter\n";
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static void registerGlobalPointer OF((__GPRO));
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static void registerGlobalPointer(__G)
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__GDEF
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{
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int scan=0;
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ulg tid = GetThreadId();
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while (threadIdTable[scan] && scan < THREADID_ENTRIES)
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scan++;
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if (scan == THREADID_ENTRIES) {
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ZCONST char *tooMany = LoadFarString(TooManyThreads);
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Info(slide, 0x421, ((char *)slide, tooMany, THREADID_ENTRIES));
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free(pG);
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EXIT(PK_MEM); /* essentially memory error before we've started */
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}
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threadIdTable [scan] = tid;
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threadPtrTable[scan] = pG;
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lastScan = scan;
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}
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void deregisterGlobalPointer(__G)
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__GDEF
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{
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int scan=0;
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ulg tid = GetThreadId();
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while (threadIdTable[scan] != tid && scan < THREADID_ENTRIES)
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scan++;
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/*---------------------------------------------------------------------------
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There are two things we can do if we can't find the entry: ignore it or
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scream. The most likely reason for it not to be here is the user calling
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this routine twice. Since this could cause BIG problems if any globals
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are accessed after the first call, we'd better scream.
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---------------------------------------------------------------------------*/
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if (scan == THREADID_ENTRIES || threadPtrTable[scan] != pG) {
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ZCONST char *noEntry;
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if (scan == THREADID_ENTRIES)
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noEntry = LoadFarString(EntryNotFound);
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else
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noEntry = LoadFarString(GlobalPointerMismatch);
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Info(slide, 0x421, ((char *)slide, noEntry));
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EXIT(PK_WARN); /* programming error, but after we're all done */
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}
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threadIdTable [scan] = 0;
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lastScan = scan;
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free(threadPtrTable[scan]);
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}
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Uz_Globs *getGlobalPointer()
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{
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int scan=0;
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ulg tid = GetThreadId();
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while (threadIdTable[scan] != tid && scan < THREADID_ENTRIES)
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scan++;
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/*---------------------------------------------------------------------------
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There are two things we can do if we can't find the entry: ignore it or
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scream. The most likely reason for it not to be here is the user calling
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this routine twice. Since this could cause BIG problems if any globals
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are accessed after the first call, we'd better scream.
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---------------------------------------------------------------------------*/
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if (scan == THREADID_ENTRIES) {
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ZCONST char *noEntry = LoadFarString(EntryNotFound);
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fprintf(stderr, noEntry); /* can't use Info w/o a global pointer */
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EXIT(PK_ERR); /* programming error while still working */
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}
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return threadPtrTable[scan];
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}
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# endif /* ?USETHREADID */
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#endif /* ?REENTRANT */
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Uz_Globs *globalsCtor()
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{
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#ifdef REENTRANT
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Uz_Globs *pG = (Uz_Globs *)malloc(sizeof(Uz_Globs));
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if (!pG)
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return (Uz_Globs *)NULL;
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#endif /* REENTRANT */
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/* for REENTRANT version, G is defined as (*pG) */
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memzero(&G, sizeof(Uz_Globs));
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#ifndef FUNZIP
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#ifdef CMS_MVS
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uO.aflag=1;
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uO.C_flag=1;
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#endif
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#ifdef TANDEM
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uO.aflag=1; /* default to '-a' auto create Text Files as type 101 */
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#endif
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#ifdef VMS
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# if (!defined(NO_TIMESTAMPS))
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uO.D_flag=1; /* default to '-D', no restoration of dir timestamps */
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# endif
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#endif
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uO.lflag=(-1);
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G.wildzipfn = "";
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G.pfnames = (char **)fnames;
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G.pxnames = (char **)&fnames[1];
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G.pInfo = G.info;
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G.sol = TRUE; /* at start of line */
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G.message = UzpMessagePrnt;
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G.input = UzpInput; /* not used by anyone at the moment... */
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#if defined(WINDLL) || defined(MACOS)
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G.mpause = NULL; /* has scrollbars: no need for pausing */
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#else
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G.mpause = UzpMorePause;
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#endif
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G.decr_passwd = UzpPassword;
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#endif /* !FUNZIP */
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#if (!defined(DOS_FLX_H68_NLM_OS2_W32) && !defined(AMIGA) && !defined(RISCOS))
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#if (!defined(MACOS) && !defined(ATARI) && !defined(VMS))
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G.echofd = -1;
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#endif /* !(MACOS || ATARI || VMS) */
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#endif /* !(DOS_FLX_H68_NLM_OS2_W32 || AMIGA || RISCOS) */
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#ifdef SYSTEM_SPECIFIC_CTOR
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SYSTEM_SPECIFIC_CTOR(__G);
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#endif
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#ifdef REENTRANT
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#ifdef USETHREADID
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registerGlobalPointer(__G);
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#else
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GG = &G;
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#endif /* ?USETHREADID */
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#endif /* REENTRANT */
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return &G;
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}
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