findfile.cpp File Reference

#include <corecrt_internal.h>
#include <errno.h>
#include <corecrt_internal_time.h>
#include <io.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <corecrt_internal_win32_buffer.h>

Include dependency graph for findfile.cpp:

Go to the source code of this file.

Functions
template<typename CrtTime >
static CrtTime __cdecl	convert_system_time_to_time_t (SYSTEMTIME const &st) throw ()
template<>
__time32_t __cdecl	convert_system_time_to_time_t (SYSTEMTIME const &st) throw ()
template<>
__time64_t __cdecl	convert_system_time_to_time_t (SYSTEMTIME const &st) throw ()
template<typename CrtTime >
static CrtTime __cdecl	convert_file_time_to_time_t (FILETIME const &ft) throw ()
template<typename Integer >
static Integer	convert_file_size_to_integer (DWORD const high, DWORD const low) throw ()
template<>
__int64	convert_file_size_to_integer (DWORD const high, DWORD const low) throw ()
template<>
unsigned long	convert_file_size_to_integer (DWORD const high, DWORD const low) throw ()
template<typename WideFileData , typename NarrowFileData >
	_Success_ (return) static bool __cdecl copy_wide_to_narrow_find_data(WideFileData const &wfd
_Out_ NarrowFileData unsigned int const code_page	throw ()
template<typename WideFileData >
	_Success_ (return !=-1) static intptr_t __cdecl common_find_first_wide(wchar_t const *const pattern
template<typename WideFileData , typename NarrowFileData >
	_Success_ (return !=-1) static intptr_t __cdecl common_find_first_narrow(char const *const pattern
intptr_t __cdecl	_findfirst32 (char const *const pattern, _finddata32_t *const result)
intptr_t __cdecl	_findfirst32i64 (char const *const pattern, _finddata32i64_t *const result)
intptr_t __cdecl	_findfirst64i32 (char const *const pattern, _finddata64i32_t *const result)
intptr_t __cdecl	_findfirst64 (char const *const pattern, __finddata64_t *const result)
intptr_t __cdecl	_wfindfirst32 (wchar_t const *const pattern, _wfinddata32_t *const result)
intptr_t __cdecl	_wfindfirst32i64 (wchar_t const *const pattern, _wfinddata32i64_t *const result)
intptr_t __cdecl	_wfindfirst64i32 (wchar_t const *const pattern, _wfinddata64i32_t *const result)
intptr_t __cdecl	_wfindfirst64 (wchar_t const *const pattern, _wfinddata64_t *const result)
template<typename WideFileData >
static int __cdecl	common_find_next_wide (intptr_t const handle, WideFileData *const result) throw ()
template<typename WideFileData , typename NarrowFileData >
static int __cdecl	common_find_next_narrow (intptr_t const pattern, NarrowFileData *const result, unsigned int const code_page) throw ()
int __cdecl	_findnext32 (intptr_t const handle, _finddata32_t *const result)
int __cdecl	_findnext32i64 (intptr_t const handle, _finddata32i64_t *const result)
int __cdecl	_findnext64i32 (intptr_t const handle, _finddata64i32_t *const result)
int __cdecl	_findnext64 (intptr_t const handle, __finddata64_t *const result)
int __cdecl	_wfindnext32 (intptr_t const handle, _wfinddata32_t *const result)
int __cdecl	_wfindnext32i64 (intptr_t const handle, _wfinddata32i64_t *const result)
int __cdecl	_wfindnext64i32 (intptr_t const handle, _wfinddata64i32_t *const result)
int __cdecl	_wfindnext64 (intptr_t const handle, _wfinddata64_t *const result)
int __cdecl	_findclose (intptr_t const handle)

Variables
_Out_ NarrowFileData &	fd
_Out_ NarrowFileData *const	result

Function Documentation

_findclose()

int __cdecl _findclose

(

intptr_t const

handle

)

Definition at line 387 of file findfile.cpp.

{
    if (!FindClose(reinterpret_cast<HANDLE>(handle)))
    {
        errno = EINVAL;
        return -1;
    }
    return 0;
}

_findfirst32()

intptr_t __cdecl _findfirst32	(	char const *const	pattern,
		_finddata32_t *const	result
	)

Definition at line 198 of file findfile.cpp.

{
    return common_find_first_narrow<_wfinddata32_t>(pattern, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_findfirst32i64()

intptr_t __cdecl _findfirst32i64	(	char const *const	pattern,
		_finddata32i64_t *const	result
	)

Definition at line 204 of file findfile.cpp.

{
    return common_find_first_narrow<_wfinddata32i64_t>(pattern, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_findfirst64()

intptr_t __cdecl _findfirst64	(	char const *const	pattern,
		__finddata64_t *const	result
	)

Definition at line 216 of file findfile.cpp.

{
    return common_find_first_narrow<_wfinddata64_t>(pattern, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_findfirst64i32()

intptr_t __cdecl _findfirst64i32	(	char const *const	pattern,
		_finddata64i32_t *const	result
	)

Definition at line 210 of file findfile.cpp.

{
    return common_find_first_narrow<_wfinddata64i32_t>(pattern, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_findnext32()

int __cdecl _findnext32	(	intptr_t const	handle,
		_finddata32_t *const	result
	)

Definition at line 330 of file findfile.cpp.

{
    return common_find_next_narrow<_wfinddata32_t>(handle, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_findnext32i64()

int __cdecl _findnext32i64	(	intptr_t const	handle,
		_finddata32i64_t *const	result
	)

Definition at line 336 of file findfile.cpp.

{
    return common_find_next_narrow<_wfinddata32i64_t>(handle, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_findnext64()

int __cdecl _findnext64	(	intptr_t const	handle,
		__finddata64_t *const	result
	)

Definition at line 348 of file findfile.cpp.

{
    return common_find_next_narrow<_wfinddata64_t>(handle, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_findnext64i32()

int __cdecl _findnext64i32	(	intptr_t const	handle,
		_finddata64i32_t *const	result
	)

Definition at line 342 of file findfile.cpp.

{
    return common_find_next_narrow<_wfinddata64i32_t>(handle, result, __acrt_get_utf8_acp_compatibility_codepage());
}

_Success_() [1/3]

template<typename WideFileData , typename NarrowFileData >

_Success_

(

return !

= -1

)

const

_Success_() [2/3]

template<typename WideFileData >

_Success_

(

return !

= -1

)

const

_Success_() [3/3]

template<typename WideFileData , typename NarrowFileData >

_Success_

(

return

)

const &

_wfindfirst32()

intptr_t __cdecl _wfindfirst32	(	wchar_t const *const	pattern,
		_wfinddata32_t *const	result
	)

Definition at line 222 of file findfile.cpp.

{
    return common_find_first_wide(pattern, result);
}

_wfindfirst32i64()

intptr_t __cdecl _wfindfirst32i64	(	wchar_t const *const	pattern,
		_wfinddata32i64_t *const	result
	)

Definition at line 228 of file findfile.cpp.

{
    return common_find_first_wide(pattern, result);
}

_wfindfirst64()

intptr_t __cdecl _wfindfirst64	(	wchar_t const *const	pattern,
		_wfinddata64_t *const	result
	)

Definition at line 240 of file findfile.cpp.

{
    return common_find_first_wide(pattern, result);
}

_wfindfirst64i32()

intptr_t __cdecl _wfindfirst64i32	(	wchar_t const *const	pattern,
		_wfinddata64i32_t *const	result
	)

Definition at line 234 of file findfile.cpp.

{
    return common_find_first_wide(pattern, result);
}

_wfindnext32()

int __cdecl _wfindnext32	(	intptr_t const	handle,
		_wfinddata32_t *const	result
	)

Definition at line 354 of file findfile.cpp.

{
    return common_find_next_wide(handle, result);
}

_wfindnext32i64()

int __cdecl _wfindnext32i64	(	intptr_t const	handle,
		_wfinddata32i64_t *const	result
	)

Definition at line 360 of file findfile.cpp.

{
    return common_find_next_wide(handle, result);
}

_wfindnext64()

int __cdecl _wfindnext64	(	intptr_t const	handle,
		_wfinddata64_t *const	result
	)

Definition at line 372 of file findfile.cpp.

{
    return common_find_next_wide(handle, result);
}

_wfindnext64i32()

int __cdecl _wfindnext64i32	(	intptr_t const	handle,
		_wfinddata64i32_t *const	result
	)

Definition at line 366 of file findfile.cpp.

{
    return common_find_next_wide(handle, result);
}

common_find_next_narrow()

template<typename WideFileData , typename NarrowFileData >

static int __cdecl common_find_next_narrow ( intptr_t const  pattern, NarrowFileData *const  result, unsigned int const  code_page  ) throw ( )

static

Definition at line 316 of file findfile.cpp.

{
    WideFileData wide_result;
    int const return_value = common_find_next_wide(pattern, &wide_result);
    if (return_value == -1)
        return -1;
 
    if (!copy_wide_to_narrow_find_data(wide_result, *result, code_page))
        return -1;
 
    return return_value;
}

common_find_next_wide()

template<typename WideFileData >

static int __cdecl common_find_next_wide ( intptr_t const  handle, WideFileData *const  result  ) throw ( )

static

Definition at line 266 of file findfile.cpp.

{
    HANDLE const os_handle = reinterpret_cast<HANDLE>(handle);
 
    _VALIDATE_RETURN(os_handle != 0                   , EINVAL, -1);
    _VALIDATE_RETURN(os_handle != INVALID_HANDLE_VALUE, EINVAL, -1);
    _VALIDATE_RETURN(result != nullptr,                 EINVAL, -1);
 
    WIN32_FIND_DATAW wfd;
    if (!FindNextFileW(os_handle, &wfd))
    {
        DWORD const os_error = GetLastError();
        switch (os_error)
        {
        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;
    }
 
    result->attrib = wfd.dwFileAttributes == FILE_ATTRIBUTE_NORMAL
        ? 0
        : wfd.dwFileAttributes;
 
    typedef decltype(result->time_create) crt_time_type;
    result->time_create = convert_file_time_to_time_t<crt_time_type>(wfd.ftCreationTime);
    result->time_access = convert_file_time_to_time_t<crt_time_type>(wfd.ftLastAccessTime);
    result->time_write  = convert_file_time_to_time_t<crt_time_type>(wfd.ftLastWriteTime);
 
    typedef decltype(result->size) file_size_type;
    result->size = convert_file_size_to_integer<file_size_type>(wfd.nFileSizeHigh, wfd.nFileSizeLow);
 
    _ERRCHECK(wcscpy_s(result->name, _countof(result->name), wfd.cFileName));
 
    return 0;
}

Referenced by _wfindnext32(), _wfindnext32i64(), _wfindnext64(), _wfindnext64i32(), and common_find_next_narrow().

convert_file_size_to_integer() [1/3]

template<typename Integer >

static Integer convert_file_size_to_integer ( DWORD const  high, DWORD const  low  ) throw ( )

static

convert_file_size_to_integer() [2/3]

template<>

__int64 convert_file_size_to_integer	(	DWORD const	high,
		DWORD const	low
	)
throw	(
	)

Definition at line 67 of file findfile.cpp.

{
    return static_cast<__int64>(high) * 0x100000000ll + static_cast<__int64>(low);
}

convert_file_size_to_integer() [3/3]

template<>

unsigned long convert_file_size_to_integer	(	DWORD const	high,
		DWORD const	low
	)
throw	(
	)

Definition at line 73 of file findfile.cpp.

{
    UNREFERENCED_PARAMETER(high);
    return low;
}

convert_file_time_to_time_t()

template<typename CrtTime >

static CrtTime __cdecl convert_file_time_to_time_t ( FILETIME const &  ft ) throw ( )

static

Definition at line 44 of file findfile.cpp.

{
    // A FILETIME of 0 becomes a time_t of -1:
    if (ft.dwLowDateTime == 0 && ft.dwHighDateTime == 0)
        return static_cast<CrtTime>(-1);
 
    SYSTEMTIME st_utc;
    if (!FileTimeToSystemTime(&ft, &st_utc))
        return static_cast<CrtTime>(-1);
 
    SYSTEMTIME st_local;
    if (!SystemTimeToTzSpecificLocalTime(nullptr, &st_utc, &st_local))
        return static_cast<CrtTime>(-1);
 
    return convert_system_time_to_time_t<CrtTime>(st_local);
}

convert_system_time_to_time_t() [1/3]

template<typename CrtTime >

static CrtTime __cdecl convert_system_time_to_time_t ( SYSTEMTIME const &  st ) throw ( )

static

convert_system_time_to_time_t() [2/3]

template<>

__time32_t __cdecl convert_system_time_to_time_t	(	SYSTEMTIME const &	st	)
throw	(
	)

Definition at line 30 of file findfile.cpp.

{
    return __loctotime32_t(st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, -1);
}

convert_system_time_to_time_t() [3/3]

template<>

__time64_t __cdecl convert_system_time_to_time_t	(	SYSTEMTIME const &	st	)
throw	(
	)

Definition at line 36 of file findfile.cpp.

{
    return __loctotime64_t(st.wYear, st.wMonth, st.wDay, st.wHour, st.wMinute, st.wSecond, -1);
}

throw()

_Out_ NarrowFileData unsigned int const code_page throw

(

)

Definition at line 83 of file findfile.cpp.

{
    __crt_internal_win32_buffer<char> name;
 
    errno_t const cvt = __acrt_wcs_to_mbs_cp(wfd.name, name, code_page);
 
    if (cvt != 0) {
        return false;
    }
 
    _ERRCHECK(strcpy_s(fd.name, _countof(fd.name), name.data()));
 
    fd.attrib       = wfd.attrib;
    fd.time_create  = wfd.time_create;
    fd.time_access  = wfd.time_access;
    fd.time_write   = wfd.time_write;
    fd.size         = wfd.size;
 
    return true;
}

Variable Documentation

fd

_Out_ NarrowFileData& fd

Definition at line 83 of file findfile.cpp.

result

_Out_ NarrowFileData* const result

Definition at line 174 of file findfile.cpp.