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findfile.c
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C/C++ Source or Header
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1997-02-23
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7KB
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269 lines
/***
*findfile.c - C find file functions
*
* Copyright (c) 1991-1995, Microsoft Corporation. All rights reserved.
*
*Purpose:
* Defines findfirst(), findnext(), and findclose().
*
*******************************************************************************/
#include <cruntime.h>
#include <oscalls.h>
#include <errno.h>
#include <io.h>
#include <time.h>
#include <ctime.h>
#include <string.h>
#include <internal.h>
#include <tchar.h>
#ifndef _WIN32
#error ERROR - ONLY WIN32 TARGET SUPPORTED!
#endif /* _WIN32 */
time_t __cdecl __timet_from_ft(FILETIME * pft);
/***
*long findfirst(wildspec, finddata) - Find first matching file
*
*Purpose:
* Finds the first file matching a given wild card filespec and
* returns data about the file.
*
*Entry:
* char * wild - file spec optionally containing wild cards
*
* struct _finddata_t * finddata - structure to receive file data
*
*Exit:
* Good return:
* Unique handle identifying the group of files matching the spec
*
* Error return:
* Returns -1 and errno is set to error value
*
*Exceptions:
* None.
*
*******************************************************************************/
#ifdef _USE_INT64
long __cdecl _tfindfirsti64(
_TSCHAR * szWild,
struct _tfinddatai64_t * pfd
)
#else /* _USE_INT64 */
long __cdecl _tfindfirst(
_TSCHAR * szWild,
struct _tfinddata_t * pfd
)
#endif /* _USE_INT64 */
{
WIN32_FIND_DATA wfd;
HANDLE hFile;
DWORD err;
if ((hFile = FindFirstFile(szWild, &wfd)) == INVALID_HANDLE_VALUE) {
err = GetLastError();
switch (err) {
case ERROR_NO_MORE_FILES:
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
errno = ENOENT;
break;
case ERROR_NOT_ENOUGH_MEMORY:
errno = ENOMEM;
break;
default:
errno = EINVAL;
break;
}
return (-1);
}
pfd->attrib = (wfd.dwFileAttributes == FILE_ATTRIBUTE_NORMAL)
? 0 : wfd.dwFileAttributes;
pfd->time_create = __timet_from_ft(&wfd.ftCreationTime);
pfd->time_access = __timet_from_ft(&wfd.ftLastAccessTime);
pfd->time_write = __timet_from_ft(&wfd.ftLastWriteTime);
#ifdef _USE_INT64
pfd->size = ((__int64)(wfd.nFileSizeHigh)) * (0x100000000i64) +
(__int64)(wfd.nFileSizeLow);
#else /* _USE_INT64 */
pfd->size = wfd.nFileSizeLow;
#endif /* _USE_INT64 */
_tcscpy(pfd->name, wfd.cFileName);
return ((long)hFile);
}
/***
*int _findnext(hfind, finddata) - Find next matching file
*
*Purpose:
* Finds the next file matching a given wild card filespec and
* returns data about the file.
*
*Entry:
* hfind - handle from _findfirst
*
* struct _finddata_t * finddata - structure to receive file data
*
*Exit:
* Good return:
* 0 if file found
* -1 if error or file not found
* errno set
*
*Exceptions:
* None.
*
*******************************************************************************/
#ifdef _USE_INT64
int __cdecl _tfindnexti64(long hFile, struct _tfinddatai64_t * pfd)
#else /* _USE_INT64 */
int __cdecl _tfindnext(long hFile, struct _tfinddata_t * pfd)
#endif /* _USE_INT64 */
{
WIN32_FIND_DATA wfd;
DWORD err;
if (!FindNextFile((HANDLE)hFile, &wfd)) {
err = GetLastError();
switch (err) {
case ERROR_NO_MORE_FILES:
case ERROR_FILE_NOT_FOUND:
case ERROR_PATH_NOT_FOUND:
errno = ENOENT;
break;
case ERROR_NOT_ENOUGH_MEMORY:
errno = ENOMEM;
break;
default:
errno = EINVAL;
break;
}
return (-1);
}
pfd->attrib = (wfd.dwFileAttributes == FILE_ATTRIBUTE_NORMAL)
? 0 : wfd.dwFileAttributes;
pfd->time_create = __timet_from_ft(&wfd.ftCreationTime);
pfd->time_access = __timet_from_ft(&wfd.ftLastAccessTime);
pfd->time_write = __timet_from_ft(&wfd.ftLastWriteTime);
#ifdef _USE_INT64
pfd->size = ((__int64)(wfd.nFileSizeHigh)) * (0x100000000i64) +
(__int64)(wfd.nFileSizeLow);
#else /* _USE_INT64 */
pfd->size = wfd.nFileSizeLow;
#endif /* _USE_INT64 */
_tcscpy(pfd->name, wfd.cFileName);
return (0);
}
#if !defined (_UNICODE) && !defined (_USE_INT64)
/***
*int _findclose(hfind) - Release resources of find
*
*Purpose:
* Releases resources of a group of files found by _findfirst and
* _findnext
*
*Entry:
* hfind - handle from _findfirst
*
*Exit:
* Good return:
* 0 if success
* -1 if fail, errno set
*
*Exceptions:
* None.
*
*******************************************************************************/
int __cdecl _findclose(long hFile)
{
if (!FindClose((HANDLE)hFile)) {
errno = EINVAL;
return (-1);
}
return (0);
}
/***
*time_t _fttotimet(ft) - convert Win32 file time to Xenix time
*
*Purpose:
* converts a Win32 file time value to Xenix time_t
*
* Note: We cannot directly use the ft value. In Win32, the file times
* returned by the API are ambiguous. In Windows NT, they are UTC. In
* Win32S, and probably also Win32C, they are local time values. Thus,
* the value in ft must be converted to a local time value (by an API)
* before we can use it.
*
*Entry:
* int yr, mo, dy - date
* int hr, mn, sc - time
*
*Exit:
* returns Xenix time value
*
*Exceptions:
*
*******************************************************************************/
time_t __cdecl __timet_from_ft(FILETIME * pft)
{
SYSTEMTIME st;
FILETIME lft;
/* 0 FILETIME returns a -1 time_t */
if (!pft->dwLowDateTime && !pft->dwHighDateTime) {
return (-1L);
}
/*
* Convert to a broken down local time value
*/
if ( !FileTimeToLocalFileTime(pft, &lft) ||
!FileTimeToSystemTime(&lft, &st) )
{
return (-1L);
}
return ( __loctotime_t(st.wYear,
st.wMonth,
st.wDay,
st.wHour,
st.wMinute,
st.wSecond) );
}
#endif /* !defined (_UNICODE) && !defined (_USE_INT64) */