125 lines
1.6 KiB
C
125 lines
1.6 KiB
C
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/*++
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Copyright (c) 1997 Microsoft Corporation
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All rights reserved.
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Module Name:
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FileIo.c
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Abstract:
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Routines to do File IO for the migration of Win95 printing to NT
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Author:
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Muhunthan Sivapragasam (MuhuntS) 24-Aug-1998
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Revision History:
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--*/
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#include "precomp.h"
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#pragma hdrstop
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CHAR
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My_fgetc(
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HANDLE hFile
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)
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/*++
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Routine Description:
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Gets a character from the file
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Arguments:
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Return Value:
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--*/
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{
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CHAR c;
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DWORD cbRead;
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if ( ReadFile(hFile, (LPBYTE)&c, sizeof(c), &cbRead, NULL) &&
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cbRead == sizeof(c) )
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return c;
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else
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return (CHAR) EOF;
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}
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LPSTR
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My_fgets(
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LPSTR pszBuf,
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DWORD dwSize,
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HANDLE hFile
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)
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/*++
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Routine Description:
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Gets a line, or at most n characters from the file
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Arguments:
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Return Value:
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--*/
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{
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CHAR c;
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DWORD dwRead;
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LPSTR ptr;
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ptr = pszBuf;
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while ( --dwSize > 0 && (c = My_fgetc(hFile)) != EOF )
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if ( (*ptr++ = c) == '\n' )
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break;
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*ptr = '\0';
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return ( c == EOF && ptr == pszBuf ) ? NULL : pszBuf;
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}
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DWORD
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My_fread(
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LPBYTE pBuf,
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DWORD dwSize,
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HANDLE hFile
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)
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/*++
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Routine Description:
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Read at most dwSize bytes to buffer
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Arguments:
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Return Value:
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Number of bytes read
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--*/
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{
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DWORD cbRead;
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return ReadFile(hFile, pBuf, dwSize, &cbRead, NULL) ? cbRead : 0;
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}
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BOOL
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My_ungetc(
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HANDLE hFile
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)
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/*++
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Routine Description:
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Unread one character
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Arguments:
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Return Value:
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--*/
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{
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return SetFilePointer(hFile, -1, NULL, FILE_CURRENT) != 0xFFFFFFFF;
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}
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