396 lines
9.9 KiB
C
396 lines
9.9 KiB
C
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#include "precomp.h"
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#pragma hdrstop
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/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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cf.c
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Abstract:
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1. Contains code to perform simple text substitutions on a text file.
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2. Contains code to append text entries to a text file.
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This module has no external dependencies and is not statically linked
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to any part of Setup.
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Author:
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Ted Miller (tedm) July 1991
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--*/
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BOOL WriteData(HANDLE Handle,PVOID Data,DWORD DataSize);
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BOOL
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ConfigFileSubstWorker(
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IN LPSTR File,
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IN DWORD NumSubsts,
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IN LPSTR *Substs
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)
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{
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LPSTR CharPtr,old;
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LPSTR FileBuf=NULL,FileBufEnd;
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DWORD *StrLenArray;
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DWORD FileLength = 0xffffffff;
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HANDLE FileHandle = (HANDLE)(-1);
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DWORD rcID;
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BOOL Match;
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DWORD x,i;
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char CRLF[2];
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BOOL IsCFGFile;
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#define ORIGINAL_TEXT(i) Substs[(2*i)]
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#define REPLACEMENT_TEXT(i) Substs[(2*i)+1]
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#define ORIGINAL_TEXT_LENGTH(i) StrLenArray[i]
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CRLF[0] = '\r';
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CRLF[1] = '\n';
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if((StrLenArray = SAlloc(NumSubsts * sizeof(DWORD))) == NULL) {
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SetErrorText(IDS_ERROR_DLLOOM);
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return(FALSE);
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}
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for(i=0; i<NumSubsts; i++) {
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ORIGINAL_TEXT_LENGTH(i) = lstrlen(ORIGINAL_TEXT(i));
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}
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if(((FileHandle = CreateFile(File,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,0,NULL)) == (HANDLE)(-1))
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|| ((FileLength = GetFileSize(FileHandle,NULL)) == 0xffffffff)
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|| ((FileBuf = SAlloc(FileLength+1)) == NULL)
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|| (ReadFile(FileHandle,FileBuf,FileLength,&i,NULL) == FALSE))
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{
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if(FileBuf != NULL) {
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rcID = IDS_ERROR_READFAILED;
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SFree(FileBuf);
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} else if(FileLength != 0xffffffff) {
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rcID = IDS_ERROR_DLLOOM;
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} else if(FileHandle != (HANDLE)-1) {
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rcID = IDS_ERROR_NOSIZE;
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} else {
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rcID = IDS_ERROR_BADFILE;
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}
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if(rcID != IDS_ERROR_BADFILE) {
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CloseHandle(FileHandle);
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}
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SFree(StrLenArray);
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SetErrorText(rcID);
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return(FALSE);
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}
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CloseHandle(FileHandle);
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if((FileHandle = CreateFile(File,GENERIC_WRITE,0,NULL,TRUNCATE_EXISTING,0,NULL)) == (HANDLE)(-1)) { // truncate
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SFree(StrLenArray);
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SFree(FileBuf);
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SetErrorText(IDS_ERROR_BADFILE);
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return(FALSE);
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}
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FileBufEnd = FileBuf + FileLength - 1;
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if(*FileBufEnd != '\n') {
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*(FileBufEnd+1) = '\n';
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}
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for(CharPtr = FileBuf; CharPtr <= FileBufEnd; CharPtr++) {
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if(*CharPtr == '\n') {
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*CharPtr = '\0';
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}
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}
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if((x = lstrlen(File)) > 4) {
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IsCFGFile = !lstrcmpi(&File[x-4],".cfg");
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}
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CharPtr = FileBuf-1;
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while(++CharPtr <= FileBufEnd) { // skips NUL
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while(*CharPtr) {
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if(*CharPtr == '\r') {
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CharPtr++;
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continue;
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}
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// ignore comments in .cfg files
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if(IsCFGFile && (*CharPtr == '/') && (*(CharPtr+1) == '/')) {
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old = CharPtr;
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while(*CharPtr && (*CharPtr != '\r')) {
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CharPtr++;
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}
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if(!WriteData(FileHandle,old,(DWORD)(CharPtr - old))) {
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goto xxx_err1;
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}
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if(*CharPtr == '\r') {
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CharPtr++;
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}
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continue;
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}
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Match = FALSE;
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for(i=0; i<NumSubsts && !Match; i++) {
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if(!strncmp(ORIGINAL_TEXT(i),CharPtr,ORIGINAL_TEXT_LENGTH(i))) {
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Match = TRUE;
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if(!WriteData(FileHandle,REPLACEMENT_TEXT(i),lstrlen(REPLACEMENT_TEXT(i)))) {
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goto xxx_err1;
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}
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CharPtr += ORIGINAL_TEXT_LENGTH(i);
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}
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}
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if(!Match) {
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if(!WriteData(FileHandle,CharPtr,1)) {
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goto xxx_err1;
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}
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CharPtr++;
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}
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}
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if(!WriteData(FileHandle,CRLF,sizeof(CRLF))) {
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goto xxx_err1;
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}
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}
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xxx_err1:
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FlushFileBuffers(FileHandle);
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CloseHandle(FileHandle);
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SFree(StrLenArray);
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SFree(FileBuf);
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return(TRUE);
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}
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BOOL
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BinaryFileSubstWorker(
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IN LPSTR File,
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IN DWORD NumSubsts,
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IN LPSTR *Substs
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)
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{
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LPSTR CharPtr;
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LPSTR FileBuf=NULL;
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DWORD *StrLenArray;
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DWORD FileLength = 0xffffffff;
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HANDLE FileHandle = (HANDLE)(-1);
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DWORD rcID;
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BOOL Match;
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DWORD i;
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if((StrLenArray = SAlloc(NumSubsts * sizeof(DWORD))) == NULL) {
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SetErrorText(IDS_ERROR_DLLOOM);
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return(FALSE);
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}
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// make sure original and replacement text are the same length
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// within a given pair
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for(i=0; i<NumSubsts; i++) {
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ORIGINAL_TEXT_LENGTH(i) = lstrlen(ORIGINAL_TEXT(i));
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if(ORIGINAL_TEXT_LENGTH(i) != (DWORD)lstrlen(REPLACEMENT_TEXT(i))) {
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SFree(StrLenArray);
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SetErrorText(IDS_ERROR_BADARGS);
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return(FALSE);
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}
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}
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if(((FileHandle = CreateFile(File,GENERIC_READ,FILE_SHARE_READ,NULL,OPEN_EXISTING,0,NULL)) == (HANDLE)(-1))
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|| ((FileLength = GetFileSize(FileHandle,NULL)) == 0xffffffff)
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|| ((FileBuf = SAlloc(FileLength)) == NULL)
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|| (ReadFile(FileHandle,FileBuf,FileLength,&i,NULL) == FALSE))
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{
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if(FileBuf != NULL) {
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rcID = IDS_ERROR_READFAILED;
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SFree(FileBuf);
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} else if(FileLength != 0xffffffff) {
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rcID = IDS_ERROR_DLLOOM;
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} else if(FileHandle != (HANDLE)-1) {
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rcID = IDS_ERROR_NOSIZE;
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} else {
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rcID = IDS_ERROR_BADFILE;
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}
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if(rcID != IDS_ERROR_BADFILE) {
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CloseHandle(FileHandle);
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}
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SFree(StrLenArray);
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SetErrorText(rcID);
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return(FALSE);
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}
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CloseHandle(FileHandle);
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if((FileHandle = CreateFile(File,GENERIC_WRITE,0,NULL,TRUNCATE_EXISTING,0,NULL)) == (HANDLE)(-1)) { // truncate
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SFree(StrLenArray);
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SFree(FileBuf);
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SetErrorText(IDS_ERROR_BADFILE);
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return(FALSE);
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}
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for(CharPtr=FileBuf; CharPtr<FileBuf+FileLength; ) {
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for(Match=FALSE,i=0; i<NumSubsts && !Match; i++) {
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if(!strncmp(ORIGINAL_TEXT(i),CharPtr,ORIGINAL_TEXT_LENGTH(i))) {
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Match = TRUE;
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if(!WriteData(FileHandle,REPLACEMENT_TEXT(i),lstrlen(REPLACEMENT_TEXT(i)))) {
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goto xxx_err2;
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}
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CharPtr += ORIGINAL_TEXT_LENGTH(i);
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}
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}
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if(!Match) {
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if(!WriteData(FileHandle,CharPtr,1)) {
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goto xxx_err2;
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}
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CharPtr++;
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}
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}
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xxx_err2:
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FlushFileBuffers(FileHandle);
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CloseHandle(FileHandle);
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SFree(StrLenArray);
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SFree(FileBuf);
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return(TRUE);
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}
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BOOL
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ConfigFileAppendWorker(
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IN LPSTR File,
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IN DWORD NumSubsts,
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IN LPSTR *Substs
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)
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{
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HANDLE FileHandle;
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DWORD rcID;
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DWORD i;
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char CRLF[2];
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DWORD OriginalAttributes;
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OFSTRUCT ReOpen;
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CRLF[0] = '\r';
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CRLF[1] = '\n';
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// See if file exists, if it doesn't open it with create option. else
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// Open existing after modifying attributes to FILE_ATTRIBUTE_NORMAL
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if (OpenFile(File,&ReOpen,OF_EXIST) == -1) {
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OriginalAttributes = FILE_ATTRIBUTE_NORMAL;
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FileHandle = CreateFile(
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File,
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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CREATE_NEW,
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OriginalAttributes,
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NULL
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);
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if (FileHandle == (HANDLE)-1) {
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SetErrorText(IDS_ERROR_BADFILE);
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return(FALSE);
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}
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}
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else {
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// 1. Modify Attributes
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if (!(
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((OriginalAttributes = GetFileAttributes(File)) != -1L)
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&&
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(
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OriginalAttributes == FILE_ATTRIBUTE_NORMAL
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SetFileAttributes(File, FILE_ATTRIBUTE_NORMAL)
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)
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)
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) {
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SetErrorText(IDS_ERROR_BADFILE);
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return(FALSE);
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}
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// 2. Open the file
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if((FileHandle = CreateFile(
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File,
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GENERIC_READ | GENERIC_WRITE,
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0,
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NULL,
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OPEN_EXISTING,
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0,
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NULL
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)) == (HANDLE)(-1)) {
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rcID = IDS_ERROR_BADFILE;
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SetErrorText(rcID);
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return(FALSE);
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}
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// 3. Shift file pointer to end
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if(SetFilePointer(
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FileHandle, // The File Handle
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0L, // Distance to move, low dword
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0L, // Distance to move, high dword
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FILE_END // Move Method, (relative to eof)
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) == (DWORD)-1L){
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rcID = IDS_ERROR_BADFILE;
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CloseHandle(FileHandle);
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SetErrorText(rcID);
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return(FALSE);
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}
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} // end of else
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// Append all the text entries to the end of the file
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for (i = 0; i < NumSubsts; i++)
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if(!WriteData (FileHandle, Substs[i], lstrlen(Substs[i])) ||
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!WriteData(FileHandle,CRLF,sizeof(CRLF)))
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break;
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// Clean up
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FlushFileBuffers(FileHandle);
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CloseHandle(FileHandle);
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// reset the attributes to the previous attributes
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if(!(OriginalAttributes == FILE_ATTRIBUTE_NORMAL ||
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SetFileAttributes(File, OriginalAttributes)))
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SetErrorText(IDS_ERROR_BADFILE);
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return(TRUE);
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}
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BOOL
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WriteData(
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IN HANDLE Handle,
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IN PVOID Data,
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IN DWORD DataSize
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)
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{
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BOOL rc;
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DWORD bw;
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if(!(rc = WriteFile(Handle,Data,DataSize,&bw,NULL))) {
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SetErrorText(IDS_ERROR_WRITE);
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}
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return(rc);
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}
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