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Tricks of the Windows Gam…ming Gurus (2nd Edition)
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Disc2.iso
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vc98
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crt
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unlink.c
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C/C++ Source or Header
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1998-06-17
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/***
*unlink.c - unlink a file
*
* Copyright (c) 1989-1997, Microsoft Corporation. All rights reserved.
*
*Purpose:
* defines unlink() - unlink a file
*
*******************************************************************************/
#ifndef _MAC
#include <cruntime.h>
#include <oscalls.h>
#include <internal.h>
#include <io.h>
#include <tchar.h>
/***
*int _unlink(path) - unlink(delete) the given file
*
*Purpose:
* This version deletes the given file because there is no
* distinction between a linked file and non-linked file.
*
* NOTE: remove() is an alternative entry point to the _unlink()
* routine* interface is identical.
*
*Entry:
* _TSCHAR *path - file to unlink/delete
*
*Exit:
* returns 0 if successful
* returns -1 and sets errno if unsuccessful
*
*Exceptions:
*
*******************************************************************************/
int __cdecl _tremove (
const _TSCHAR *path
)
{
ULONG dosretval;
if (!DeleteFile((LPTSTR)path))
dosretval = GetLastError();
else
dosretval = 0;
if (dosretval) {
/* error occured -- map error code and return */
_dosmaperr(dosretval);
return -1;
}
return 0;
}
int __cdecl _tunlink (
const _TSCHAR *path
)
{
/* remove is synonym for unlink */
return _tremove(path);
}
#else /* _MAC */
#include <cruntime.h>
//#include <oscalls.h>
#include <internal.h>
#include <io.h>
#include <errno.h>
#include <stdlib.h>
#include <macos\files.h>
#include <macos\errors.h>
#include <string.h>
/***
*int _unlink(path) - unlink(delete) the given file
*
*Purpose:
* This version deletes the given file but not a directory
*
*Entry:
* char *path - file to unlink/delete
*
*Exit:
* returns 0 if successful
* returns -1 and sets errno if unsuccessful
*
*Exceptions:
*
*******************************************************************************/
int __cdecl _unlink (
const char *path
)
{
ParamBlockRec parm;
OSErr osErr;
char stPath[256];
if (!*path || strlen(path) > 255)
{
errno = ENOENT;
return -1;
}
strcpy(stPath, path);
_c2pstr(stPath);
memset(&parm, '\0', sizeof(ParamBlockRec));
parm.fileParam.ioNamePtr = stPath;
/* parm.fileParam.ioVRefNum = 0; */
/* parm.fileParam.ioFDirIndex = 0; */
if (!(osErr = PBGetFInfoSync(&parm))) /* Make sure it's not a dir */
{
memset(&parm, '\0', sizeof(ParamBlockRec));
parm.ioParam.ioNamePtr = stPath;
/* parm.ioParam.ioVRefNum = 0; */
osErr = PBDeleteSync(&parm);
}
if (osErr)
{
/* error occured -- map error code and return */
_dosmaperr(osErr);
return -1;
}
return 0;
}
#endif /* _MAC */