159 lines
3.5 KiB
C
159 lines
3.5 KiB
C
/*++
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Copyright (c) 1996 Microsoft Corporation
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Module Name:
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help.c
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Abstract:
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This file implements the code for the help file installation.
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Environment:
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WIN32 User Mode
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Author:
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Wesley Witt (wesw) 17-Feb-1996
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--*/
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#include "wizard.h"
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#pragma hdrstop
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#define HELP_INDEX_TAG ":Index "
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#define HELP_INDEX_SEP '='
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#define CRLF "\r\n"
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#define FAX_HELP_STRING ":Index Fax Help=fax.hlp"
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#define FAX_HELP_TAG "Fax Help"
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#define HELP_INDEX_TAG_LEN 7
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#define FAX_HELP_TAG_LEN 8
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#define FAX_HELP_STRING_LEN 23
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#define CRLF_LEN 2
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BOOL
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InstallHelpFiles(
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VOID
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)
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{
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BOOL rVal = FALSE;
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TCHAR Buffer[MAX_PATH];
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HANDLE hFile = INVALID_HANDLE_VALUE;
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HANDLE hMap = NULL;
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LPSTR fPtr = NULL;
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LPSTR p,s;
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DWORD FileSize;
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INT cmp;
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ExpandEnvironmentStrings( TEXT("%windir%\\system32\\windows.cnt"), Buffer, sizeof(Buffer) );
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hFile = CreateFile(
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Buffer,
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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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);
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if (hFile == INVALID_HANDLE_VALUE) {
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goto exit;
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}
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FileSize = GetFileSize( hFile, NULL );
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if (FileSize == 0xffffffff) {
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goto exit;
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}
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hMap = CreateFileMapping(
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hFile,
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NULL,
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PAGE_READWRITE,
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0,
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FileSize + 1024,
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NULL
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);
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if (!hMap) {
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goto exit;
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}
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fPtr = (LPSTR) MapViewOfFile(
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hMap,
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FILE_MAP_ALL_ACCESS,
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0,
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0,
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0
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);
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if (!fPtr) {
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goto exit;
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}
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p = fPtr;
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while (p<fPtr+FileSize) {
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if (_strnicmp( p, HELP_INDEX_TAG, HELP_INDEX_TAG_LEN ) == 0) {
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p += HELP_INDEX_TAG_LEN;
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s = strchr( p, HELP_INDEX_SEP );
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if (s) {
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cmp = strncmp( p, FAX_HELP_TAG, s-p );
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if (cmp == 0) {
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//
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// fax help is already installed
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//
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goto exit;
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} else if (cmp > 0) {
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//
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// this is where we insert it
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//
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p -= HELP_INDEX_TAG_LEN;
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MoveMemory( p+FAX_HELP_STRING_LEN+CRLF_LEN, p, FileSize-(p-fPtr) );
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CopyMemory( p, FAX_HELP_STRING, FAX_HELP_STRING_LEN );
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p += FAX_HELP_STRING_LEN;
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CopyMemory( p, CRLF, CRLF_LEN );
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UnmapViewOfFile( fPtr );
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CloseHandle( hMap );
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fPtr = NULL;
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hMap = NULL;
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SetFilePointer( hFile, FileSize+FAX_HELP_STRING_LEN+CRLF_LEN, NULL, FILE_BEGIN );
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SetEndOfFile( hFile );
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break;
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}
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}
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}
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//
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// skip to the next line
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//
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while( *p != '\n' ) p++;
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p += 1;
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}
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ExpandEnvironmentStrings( TEXT("%windir%\\system32\\windows.gid"), Buffer, sizeof(Buffer) );
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MyDeleteFile( Buffer );
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ExpandEnvironmentStrings( TEXT("%windir%\\system32\\windows.fts"), Buffer, sizeof(Buffer) );
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MyDeleteFile( Buffer );
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ExpandEnvironmentStrings( TEXT("%windir%\\system32\\windows.ftg"), Buffer, sizeof(Buffer) );
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MyDeleteFile( Buffer );
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rVal = TRUE;
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exit:
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if (fPtr) {
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UnmapViewOfFile( fPtr );
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}
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if (hMap) {
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CloseHandle( hMap );
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}
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if (hFile) {
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CloseHandle( hFile );
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}
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return rVal;
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}
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