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696 lines
14 KiB
696 lines
14 KiB
#include <windows.h>
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#include <lzexpand.h>
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#include <fcntl.h>
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/************************************************************************\
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*
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* NOTE!!!!
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*
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* While the 'Diamond' interfaced functions defined in this file are
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* multi thread safe, EACH THREAD MUST ONLY HAVE ONE DIAMOND FILE
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* OPEN AT A TIME! (ie. You can not nest InitDiamond()/TermDiamond()
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* pairs in one thread of execution.)
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*
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\************************************************************************/
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//
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// diamond headers
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//
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#include <diamondd.h>
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#include "mydiam.h"
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INT CopyDateTimeStamp(INT doshFrom, INT doshTo)
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{
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FILETIME lpCreationTime, lpLastAccessTime, lpLastWriteTime;
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if(!GetFileTime((HANDLE) doshFrom, &lpCreationTime, &lpLastAccessTime,
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&lpLastWriteTime)){
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return((INT)LZERROR_BADINHANDLE);
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}
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if(!SetFileTime((HANDLE) doshTo, &lpCreationTime, &lpLastAccessTime,
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&lpLastWriteTime)){
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return((INT)LZERROR_BADINHANDLE);
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}
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return(TRUE);
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}
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int
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DIAMONDAPI
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SpdFdiOpen(
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IN PSTR FileName,
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IN int oflag,
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IN int pmode
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);
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int
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DIAMONDAPI
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SpdFdiClose(
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IN int Handle
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);
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typedef struct _DIAMOND_INFO {
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//
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// A read handle to the source file.
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//
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int SourceFileHandle;
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//
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// File names.
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//
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PSTR SourceFileName;
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PSTR TargetFileName;
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//
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// Flag indicating whether to rename the target file.
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//
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BOOL RenameTargetFile;
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//
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// Pointer to LZ information structure.
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// We'll fill in some of the fields to fool expand.
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//
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PLZINFO pLZI;
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} DIAMOND_INFO, *PDIAMOND_INFO;
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PSTR
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StringRevChar(
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IN PSTR String,
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IN CHAR Char
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)
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{
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//
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// Although not the most efficient possible algoeithm in each case,
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// this algorithm is correct for unicode, sbcs, or dbcs.
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//
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PCHAR Occurrence,Next;
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//
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// Check each character in the string and remember
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// the most recently encountered occurrence of the desired char.
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//
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for(Occurrence=NULL,Next=CharNextA(String); *String; ) {
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if(!memcmp(String,&Char,(PUCHAR)Next-(PUCHAR)String)) {
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Occurrence = String;
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}
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String = Next;
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Next = CharNextA(Next);
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}
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//
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// Return address of final occurrence of the character
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// (will be NULL if not found at all).
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//
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return(Occurrence);
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}
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int
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DIAMONDAPI
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DiamondNotifyFunction(
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IN FDINOTIFICATIONTYPE Operation,
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IN PFDINOTIFICATION Parameters
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)
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{
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switch(Operation) {
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case fdintCABINET_INFO:
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case fdintNEXT_CABINET:
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case fdintPARTIAL_FILE:
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//
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// Cabinet management functions which we don't use.
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// Return success.
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//
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return(0);
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case fdintCOPY_FILE:
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//
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// Diamond is asking us whether we want to copy the file.
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//
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{
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PDIAMOND_INFO Info = (PDIAMOND_INFO)Parameters->pv;
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HFILE h;
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//
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// If we need to rename the target file, do that here.
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// The name stored in the cabinet file will be used as
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// the uncompressed name.
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//
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if(Info->RenameTargetFile) {
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PSTR p,q;
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//
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// Find the start of the filename part of the target.
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//
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if(p = StringRevChar(Info->TargetFileName,'\\')) {
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p++;
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} else {
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p = Info->TargetFileName;
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}
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//
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// Find the start of the filename part of the name in the cabinet.
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//
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if(q = StringRevChar(Parameters->psz1,'\\')) {
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q++;
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} else {
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q = Parameters->psz1;
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}
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//
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// Copy the filename part of the name in the cabinet over
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// the filename part of the name in the target spec.
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//
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lstrcpyA(p,q);
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}
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{
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// Check they're not the same file
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CHAR Source[MAX_PATH];
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CHAR Target[MAX_PATH];
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PSTR FileName;
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DWORD PathLenSource;
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DWORD PathLenTarget;
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PathLenSource = GetFullPathNameA(Info->SourceFileName,
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MAX_PATH,
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Source,
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&FileName);
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PathLenTarget = GetFullPathNameA(Info->TargetFileName,
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MAX_PATH,
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Target,
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&FileName);
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if (PathLenSource == 0 || PathLenSource >= MAX_PATH ||
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PathLenTarget == 0 || PathLenTarget >= MAX_PATH ||
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lstrcmpiA(Source, Target) == 0) {
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return 0;
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}
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}
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//
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// Remember the uncompressed size and open the file.
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// Returns -1 if an error occurs opening the file.
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//
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Info->pLZI->cblOutSize = Parameters->cb;
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h = _lcreat(Info->TargetFileName,0);
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if(h == HFILE_ERROR) {
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DiamondLastIoError = LZERROR_BADOUTHANDLE;
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return(-1);
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}
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return(h);
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}
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case fdintCLOSE_FILE_INFO:
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//
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// Diamond is done with the target file and wants us to close it.
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// (ie, this is the counterpart to fdint_COPY_FILE).
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//
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{
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PDIAMOND_INFO Info = (PDIAMOND_INFO)Parameters->pv;
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CopyDateTimeStamp(Info->SourceFileHandle,Parameters->hf);
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_lclose(Parameters->hf);
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}
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return(TRUE);
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}
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}
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PVOID
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DIAMONDAPI
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SpdFdiAlloc(
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IN ULONG NumberOfBytes
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)
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/*++
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Routine Description:
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Callback used by FDICopy to allocate memory.
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Arguments:
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NumberOfBytes - supplies desired size of block.
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Return Value:
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Returns pointer to a block of memory or NULL
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if memory cannot be allocated.
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--*/
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{
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return((PVOID)LocalAlloc(LMEM_FIXED,NumberOfBytes));
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}
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VOID
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DIAMONDAPI
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SpdFdiFree(
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IN PVOID Block
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)
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/*++
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Routine Description:
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Callback used by FDICopy to free a memory block.
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The block must have been allocated with SpdFdiAlloc().
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Arguments:
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Block - supplies pointer to block of memory to be freed.
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Return Value:
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None.
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--*/
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{
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LocalFree((HLOCAL)Block);
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}
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int
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DIAMONDAPI
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SpdFdiOpen(
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IN PSTR FileName,
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IN int oflag,
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IN int pmode
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)
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/*++
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Routine Description:
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Callback used by FDICopy to open files.
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Arguments:
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FileName - supplies name of file to be opened.
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oflag - supplies flags for open.
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pmode - supplies additional flags for open.
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Return Value:
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Handle to open file or -1 if error occurs.
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--*/
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{
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HFILE h;
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int OpenMode;
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if(oflag & _O_WRONLY) {
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OpenMode = OF_WRITE;
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} else {
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if(oflag & _O_RDWR) {
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OpenMode = OF_READWRITE;
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} else {
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OpenMode = OF_READ;
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}
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}
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h = _lopen(FileName,OpenMode | OF_SHARE_DENY_WRITE);
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if(h == HFILE_ERROR) {
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DiamondLastIoError = LZERROR_BADINHANDLE;
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return(-1);
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}
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return((int)h);
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}
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UINT
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DIAMONDAPI
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SpdFdiRead(
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IN int Handle,
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OUT PVOID pv,
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IN UINT ByteCount
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)
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/*++
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Routine Description:
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Callback used by FDICopy to read from a file.
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Arguments:
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Handle - supplies handle to open file to be read from.
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pv - supplies pointer to buffer to receive bytes we read.
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ByteCount - supplies number of bytes to read.
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Return Value:
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Number of bytes read (ByteCount) or -1 if an error occurs.
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--*/
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{
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UINT rc;
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rc = _lread((HFILE)Handle,pv,ByteCount);
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if(rc == HFILE_ERROR) {
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rc = (UINT)(-1);
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DiamondLastIoError = LZERROR_READ;
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}
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return(rc);
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}
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UINT
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DIAMONDAPI
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SpdFdiWrite(
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IN int Handle,
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IN PVOID pv,
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IN UINT ByteCount
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)
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/*++
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Routine Description:
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Callback used by FDICopy to write to a file.
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Arguments:
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Handle - supplies handle to open file to be written to.
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pv - supplies pointer to buffer containing bytes to write.
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ByteCount - supplies number of bytes to write.
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Return Value:
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Number of bytes written (ByteCount) or -1 if an error occurs.
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--*/
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{
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UINT rc;
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rc = _lwrite((HFILE)Handle,pv,ByteCount);
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if(rc == HFILE_ERROR) {
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DiamondLastIoError = (GetLastError() == ERROR_DISK_FULL) ? LZERROR_WRITE : LZERROR_BADOUTHANDLE;
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} else {
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if(rc != ByteCount) {
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//
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// let caller interpret return value but record last error just in case
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//
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DiamondLastIoError = LZERROR_WRITE;
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}
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}
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return(rc);
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}
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int
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DIAMONDAPI
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SpdFdiClose(
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IN int Handle
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)
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/*++
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Routine Description:
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Callback used by FDICopy to close files.
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Arguments:
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Handle - handle of file to close.
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Return Value:
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0 (success).
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--*/
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{
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_lclose((HFILE)Handle);
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return(0);
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}
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LONG
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DIAMONDAPI
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SpdFdiSeek(
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IN int Handle,
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IN long Distance,
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IN int SeekType
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)
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/*++
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Routine Description:
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Callback used by FDICopy to seek files.
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Arguments:
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Handle - handle of file to close.
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Distance - supplies distance to seek. Interpretation of this
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parameter depends on the value of SeekType.
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SeekType - supplies a value indicating how Distance is to be
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interpreted; one of SEEK_SET, SEEK_CUR, SEEK_END.
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Return Value:
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New file offset or -1 if an error occurs.
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--*/
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{
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LONG rc;
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rc = _llseek((HFILE)Handle,Distance,SeekType);
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if(rc == HFILE_ERROR) {
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DiamondLastIoError = LZERROR_BADINHANDLE;
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rc = -1L;
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}
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return(rc);
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}
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INT
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ExpandDiamondFile(
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IN PSTR SourceFileName, // Note ASCII
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IN PTSTR TargetFileNameT,
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IN BOOL RenameTarget,
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OUT PLZINFO pLZI
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)
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{
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BOOL b;
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INT rc;
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int h;
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DIAMOND_INFO DiamondInfo;
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CHAR TargetFileName[MAX_PATH];
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#ifdef UNICODE
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wsprintfA(TargetFileName, "%ls", TargetFileNameT);
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#else
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lstrcpy(TargetFileName, TargetFileNameT);
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#endif
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if(!FdiContext) {
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return(LZERROR_BADVALUE);
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}
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DiamondLastIoError = TRUE;
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//
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// Get a handle to the source to use to
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// copy the date and time stamp.
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//
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h = SpdFdiOpen(SourceFileName,_O_RDONLY,0);
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if(h == -1) {
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return(LZERROR_BADINHANDLE);
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}
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pLZI->cblInSize = GetFileSize((HANDLE)h,NULL);
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if(pLZI->cblInSize == -1) {
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SpdFdiClose(h);
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return(LZERROR_BADINHANDLE);
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}
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DiamondInfo.SourceFileHandle = h;
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DiamondInfo.SourceFileName = SourceFileName;
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DiamondInfo.TargetFileName = TargetFileName;
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DiamondInfo.RenameTargetFile = RenameTarget;
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DiamondInfo.pLZI = pLZI;
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b = FDICopy(
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FdiContext,
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SourceFileName, // pass the whole path as the name
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"", // don't bother with the path part
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0, // flags
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DiamondNotifyFunction,
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NULL, // no decryption
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&DiamondInfo
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);
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if(b) {
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rc = TRUE;
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} else {
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switch(FdiError.erfOper) {
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case FDIERROR_CORRUPT_CABINET:
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case FDIERROR_UNKNOWN_CABINET_VERSION:
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case FDIERROR_BAD_COMPR_TYPE:
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rc = LZERROR_READ; // causes SID_FORMAT_ERROR message
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break;
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case FDIERROR_ALLOC_FAIL:
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rc = LZERROR_GLOBALLOC;
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break;
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case FDIERROR_TARGET_FILE:
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case FDIERROR_USER_ABORT:
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rc = DiamondLastIoError;
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break;
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default:
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//
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// The rest of the errors are not handled specially.
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//
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rc = LZERROR_BADVALUE;
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break;
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}
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//
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// Remove the partial target file.
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//
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DeleteFileA(TargetFileName);
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}
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SpdFdiClose(h);
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return(rc);
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}
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|
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BOOL
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IsDiamondFile(
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IN PSTR FileName
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)
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{
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FDICABINETINFO CabinetInfo;
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BOOL b;
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int h;
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if(!FdiContext) {
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return(FALSE);
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}
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//
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// Open the file such that the handle is valid for use
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// in the diamond context (ie, seek, read routines above).
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//
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h = SpdFdiOpen(FileName,_O_RDONLY,0);
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if(h == -1) {
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return(FALSE);
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}
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b = FDIIsCabinet(FdiContext,h,&CabinetInfo);
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SpdFdiClose(h);
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return(b);
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}
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BOOL
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InitDiamond(
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VOID
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)
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{
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PDIAMOND_CONTEXT pdcx;
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if (!GotDmdTlsSlot())
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return FALSE;
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if (GotDmdContext())
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return FALSE;
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pdcx = LocalAlloc(LPTR, sizeof(DIAMOND_CONTEXT));
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if (pdcx == NULL || !TlsSetValue(itlsDiamondContext, pdcx)) {
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/*
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* For some unknown reason, we can't associate
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* our thread storage with the slot, so free
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* it and say we never got one.
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*/
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if (pdcx) {
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LocalFree(pdcx);
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}
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return FALSE;
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}
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SetFdiContext( FDICreate(
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SpdFdiAlloc,
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SpdFdiFree,
|
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SpdFdiOpen,
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SpdFdiRead,
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SpdFdiWrite,
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SpdFdiClose,
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SpdFdiSeek,
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cpuUNKNOWN,
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&FdiError
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));
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return(FdiContext != NULL);
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}
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|
|
VOID
|
|
TermDiamond(
|
|
VOID
|
|
)
|
|
{
|
|
if (!GotDmdTlsSlot() || !GotDmdContext())
|
|
return;
|
|
|
|
if(FdiContext) {
|
|
FDIDestroy(FdiContext);
|
|
SetFdiContext( NULL );
|
|
}
|
|
|
|
LocalFree( TlsGetValue(itlsDiamondContext) );
|
|
TlsSetValue(itlsDiamondContext, NULL);
|
|
}
|