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291 lines
8.0 KiB
291 lines
8.0 KiB
/***
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*findfile.c - C find file functions
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*
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* Copyright (c) 1991-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Defines _findfirst(), _findnext(), and _findclose().
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*
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*Revision History:
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* 08-21-91 BWM Wrote Win32 versions.
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* 09-13-91 BWM Changed handle type to long.
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* 08-18-92 SKS Add a call to FileTimeToLocalFileTime
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* as a temporary fix until _dtoxtime takes UTC
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* 08-26-92 SKS creation and last access time should be same as the
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* last write time if ctime/atime are not available.
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* 01-08-93 SKS Remove change I made 8-26-92. Previous behavior
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* was deemed "by design" and preferable.
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* 03-30-93 GJF Replaced reference to _dtoxtime with __gmtotime_t. Also
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* made _timet_from_ft a static function.
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* 04-06-93 SKS Replace _CRTAPI* with _cdecl
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* 07-21-93 GJF Repaced use of _gmtotime_t by __loctotime_t.
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* 11-01-93 CFW Enable Unicode variant.
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* 12-28-94 GJF Added _[w]findfirsti64, _[w]findnexti64.
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* 09-25-95 GJF __loctotime_t now takes a DST flag, pass -1 in this
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* slot to indicate DST status is unknown.
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* 10-06-95 SKS Add "const" to "char *" in prototypes for *findfirst().
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* Prepend missing underscores to func names in comments.
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* 11-13-97 RKP Change longs to INT_PTR for 64 bit support.
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* 04-27-99 PML Change INT_PTR to intptr_t.
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*
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*******************************************************************************/
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#include <cruntime.h>
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#include <oscalls.h>
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#include <errno.h>
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#include <io.h>
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#include <time.h>
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#include <ctime.h>
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#include <string.h>
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#include <internal.h>
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#include <tchar.h>
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#ifndef _WIN32
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#error ERROR - ONLY WIN32 TARGET SUPPORTED!
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#endif
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time_t __cdecl __timet_from_ft(FILETIME * pft);
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/***
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*intptr_t _findfirst(wildspec, finddata) - Find first matching file
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*
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*Purpose:
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* Finds the first file matching a given wild card filespec and
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* returns data about the file.
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*
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*Entry:
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* char * wild - file spec optionally containing wild cards
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*
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* struct _finddata_t * finddata - structure to receive file data
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*
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*Exit:
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* Good return:
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* Unique handle identifying the group of files matching the spec
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*
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* Error return:
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* Returns -1 and errno is set to error value
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*
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*Exceptions:
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* None.
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*
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*******************************************************************************/
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#ifdef _USE_INT64
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intptr_t __cdecl _tfindfirsti64(
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const _TSCHAR * szWild,
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struct _tfinddatai64_t * pfd
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)
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#else /* ndef _USE_INT64 */
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intptr_t __cdecl _tfindfirst(
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const _TSCHAR * szWild,
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struct _tfinddata_t * pfd
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)
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#endif /* _USE_INT64 */
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{
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WIN32_FIND_DATA wfd;
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HANDLE hFile;
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DWORD err;
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if ((hFile = FindFirstFile(szWild, &wfd)) == INVALID_HANDLE_VALUE) {
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err = GetLastError();
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switch (err) {
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case ERROR_NO_MORE_FILES:
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case ERROR_FILE_NOT_FOUND:
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case ERROR_PATH_NOT_FOUND:
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errno = ENOENT;
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break;
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case ERROR_NOT_ENOUGH_MEMORY:
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errno = ENOMEM;
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break;
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default:
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errno = EINVAL;
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break;
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}
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return (-1);
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}
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pfd->attrib = (wfd.dwFileAttributes == FILE_ATTRIBUTE_NORMAL)
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? 0 : wfd.dwFileAttributes;
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pfd->time_create = __timet_from_ft(&wfd.ftCreationTime);
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pfd->time_access = __timet_from_ft(&wfd.ftLastAccessTime);
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pfd->time_write = __timet_from_ft(&wfd.ftLastWriteTime);
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#ifdef _USE_INT64
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pfd->size = ((__int64)(wfd.nFileSizeHigh)) * (0x100000000i64) +
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(__int64)(wfd.nFileSizeLow);
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#else /* ndef _USE_INT64 */
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pfd->size = wfd.nFileSizeLow;
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#endif /* ndef _USE_INT64 */
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_tcscpy(pfd->name, wfd.cFileName);
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return ((intptr_t)hFile);
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}
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/***
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*int _findnext(hfind, finddata) - Find next matching file
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*
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*Purpose:
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* Finds the next file matching a given wild card filespec and
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* returns data about the file.
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*
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*Entry:
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* hfind - handle from _findfirst
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*
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* struct _finddata_t * finddata - structure to receive file data
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*
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*Exit:
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* Good return:
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* 0 if file found
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* -1 if error or file not found
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* errno set
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*
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*Exceptions:
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* None.
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*
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*******************************************************************************/
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#ifdef _USE_INT64
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int __cdecl _tfindnexti64(intptr_t hFile, struct _tfinddatai64_t * pfd)
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#else /* ndef _USE_INT64 */
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int __cdecl _tfindnext(intptr_t hFile, struct _tfinddata_t * pfd)
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#endif /* _USE_INT64 */
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{
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WIN32_FIND_DATA wfd;
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DWORD err;
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if (!FindNextFile((HANDLE)hFile, &wfd)) {
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err = GetLastError();
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switch (err) {
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case ERROR_NO_MORE_FILES:
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case ERROR_FILE_NOT_FOUND:
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case ERROR_PATH_NOT_FOUND:
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errno = ENOENT;
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break;
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case ERROR_NOT_ENOUGH_MEMORY:
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errno = ENOMEM;
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break;
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default:
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errno = EINVAL;
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break;
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}
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return (-1);
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}
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pfd->attrib = (wfd.dwFileAttributes == FILE_ATTRIBUTE_NORMAL)
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? 0 : wfd.dwFileAttributes;
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pfd->time_create = __timet_from_ft(&wfd.ftCreationTime);
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pfd->time_access = __timet_from_ft(&wfd.ftLastAccessTime);
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pfd->time_write = __timet_from_ft(&wfd.ftLastWriteTime);
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#ifdef _USE_INT64
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pfd->size = ((__int64)(wfd.nFileSizeHigh)) * (0x100000000i64) +
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(__int64)(wfd.nFileSizeLow);
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#else /* ndef _USE_INT64 */
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pfd->size = wfd.nFileSizeLow;
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#endif /* ndef _USE_INT64 */
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_tcscpy(pfd->name, wfd.cFileName);
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return (0);
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}
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#if !defined(_UNICODE) && !defined(_USE_INT64)
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/***
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*int _findclose(hfind) - Release resources of find
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*
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*Purpose:
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* Releases resources of a group of files found by _findfirst and
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* _findnext
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*
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*Entry:
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* hfind - handle from _findfirst
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*
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*Exit:
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* Good return:
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* 0 if success
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* -1 if fail, errno set
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*
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*Exceptions:
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* None.
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*
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*******************************************************************************/
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int __cdecl _findclose(intptr_t hFile)
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{
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if (!FindClose((HANDLE)hFile)) {
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errno = EINVAL;
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return (-1);
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}
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return (0);
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}
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/***
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*time_t _fttotimet(ft) - convert Win32 file time to Xenix time
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*
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*Purpose:
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* converts a Win32 file time value to Xenix time_t
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*
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* Note: We cannot directly use the ft value. In Win32, the file times
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* returned by the API are ambiguous. In Windows NT, they are UTC. In
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* Win32S, and probably also Win32C, they are local time values. Thus,
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* the value in ft must be converted to a local time value (by an API)
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* before we can use it.
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*
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*Entry:
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* int yr, mo, dy - date
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* int hr, mn, sc - time
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*
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*Exit:
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* returns Xenix time value
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*
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*Exceptions:
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*
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*******************************************************************************/
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time_t __cdecl __timet_from_ft(FILETIME * pft)
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{
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SYSTEMTIME st;
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FILETIME lft;
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/* 0 FILETIME returns a -1 time_t */
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if (!pft->dwLowDateTime && !pft->dwHighDateTime) {
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return (-1L);
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}
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/*
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* Convert to a broken down local time value
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*/
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if ( !FileTimeToLocalFileTime(pft, &lft) ||
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!FileTimeToSystemTime(&lft, &st) )
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{
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return (-1L);
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}
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return ( __loctotime_t(st.wYear,
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st.wMonth,
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st.wDay,
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st.wHour,
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st.wMinute,
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st.wSecond,
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-1) );
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}
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#endif
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