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_findnext, _findnext32, _findnext32i64, _findnext64, _findnext64i32, _findnexti64, _wfindnext, _wfindnext32, _wfindnext32i64, _wfindnext64, _wfindnext64i32, _wfindnexti64

  • Članek

Find the next name, if any, that matches the filespec argument in a previous call to _findfirst, and then alter the fileinfo structure contents accordingly.

Syntax

int _findnext(
   intptr_t handle,
   struct _finddata_t *fileinfo
);
int _findnext32(
   intptr_t handle,
   struct _finddata32_t *fileinfo
);
int _findnext64(
   intptr_t handle,
   struct __finddata64_t *fileinfo
);
int _findnexti64(
   intptr_t handle,
   struct __finddatai64_t *fileinfo
);
int _findnext32i64(
   intptr_t handle,
   struct _finddata32i64_t *fileinfo
);
int _findnext64i32(
   intptr_t handle,
   struct _finddata64i32_t *fileinfo
);
int _wfindnext(
   intptr_t handle,
   struct _wfinddata_t *fileinfo
);
int _wfindnext32(
   intptr_t handle,
   struct _wfinddata32_t *fileinfo
);
int _wfindnext64(
   intptr_t handle,
   struct _wfinddata64_t *fileinfo
);
int _wfindnexti64(
   intptr_t handle,
   struct _wfinddatai64_t *fileinfo
);
int _wfindnext32i64(
   intptr_t handle,
   struct _wfinddatai64_t *fileinfo
);
int _wfindnext64i32(
   intptr_t handle,
   struct _wfinddata64i32_t *fileinfo
);

Parameters

handle
The search handle returned by a previous call to _findfirst.

fileinfo
File information buffer.

Return value

If successful, returns 0. Otherwise, returns -1 and sets errno to a value indicating the nature of the failure. Possible error codes are shown in the following table.

errno value Condition
EINVAL Invalid parameter: fileinfo was NULL. Or, the operating system returned an unexpected error.
ENOENT No more matching files could be found.
ENOMEM Not enough memory or the file name's length exceeded MAX_PATH.

If an invalid parameter is passed in, these functions invoke the invalid parameter handler, as described in Parameter validation.

Remarks

You must call _findclose after you're finished using either the _findfirst or _findnext function (or any variants). _findclose frees up resources used by these functions in your application.

The variations of these functions with the w prefix are wide-character versions; otherwise, they're identical to the corresponding single-byte functions.

Variations of these functions support 32-bit or 64-bit time types and 32-bit or 64-bit file sizes. The first numerical suffix (32 or 64) indicates the size of the time type used; the second suffix is either i32 or i64, indicating whether the file size is represented as a 32-bit or 64-bit integer. For information about which versions support 32-bit and 64-bit time types and file sizes, see the following table. The variations that use a 64-bit time type allow file-creation dates to be expressed up through 23:59:59, December 31, 3000, UTC; whereas those using 32-bit time types only represent dates through 23:59:59 January 18, 2038, UTC. Midnight, January 1, 1970, is the lower bound of the date range for all these functions.

Unless you have a specific reason to use the versions that specify the time size explicitly, use _findnext or _wfindnext or, if you need to support file sizes greater than 3 GB, use _findnexti64 or _wfindnexti64. All these functions use the 64-bit time type. In previous versions, these functions used a 32-bit time type. If this change is a breaking change for an application, you might define _USE_32BIT_TIME_T to get the old behavior. If _USE_32BIT_TIME_T is defined, _findnext, _findnexti64 and their corresponding Unicode versions use a 32-bit time.

By default, this function's global state is scoped to the application. To change this behavior, see Global state in the CRT.

Time Type and File Length Type Variations of _findnext

Functions _USE_32BIT_TIME_T defined? Time type File length type
_findnext, _wfindnext Not defined 64-bit 32-bit
_findnext, _wfindnext Defined 32-bit 32-bit
_findnext32, _wfindnext32 Not affected by the macro definition 32-bit 32-bit
_findnext64, _wfindnext64 Not affected by the macro definition 64-bit 64-bit
_findnexti64, _wfindnexti64 Not defined 64-bit 64-bit
_findnexti64, _wfindnexti64 Defined 32-bit 64-bit
_findnext32i64, _wfindnext32i64 Not affected by the macro definition 32-bit 64-bit
_findnext64i32, _wfindnext64i32 Not affected by the macro definition 64-bit 32-bit

Generic-text routine mappings

Tchar.h routine _UNICODE and _MBCS not defined _MBCS defined _UNICODE defined
_tfindnext _findnext _findnext _wfindnext
_tfindnext32 _findnext32 _findnext32 _wfindnext32
_tfindnext64 _findnext64 _findnext64 _wfindnext64
_tfindnexti64 _findnexti64 _findnexti64 _wfindnexti64
_tfindnext32i64 _findnext32i64 _findnext32i64 _wfindnext32i64
_tfindnext64i32 _findnext64i32 _findnext64i32 _wfindnext64i32

Requirements

Function Required header
_findnext <io.h>
_findnext32 <io.h>
_findnext64 <io.h>
_findnexti64 <io.h>
_findnext32i64 <io.h>
_findnext64i32 <io.h>
_wfindnext <io.h> or <wchar.h>
_wfindnext32 <io.h> or <wchar.h>
_wfindnext64 <io.h> or <wchar.h>
_wfindnexti64 <io.h> or <wchar.h>
_wfindnext32i64 <io.h> or <wchar.h>
_wfindnext64i32 <io.h> or <wchar.h>

For more compatibility information, see Compatibility.

Libraries

All versions of the C run-time libraries.

See also

System calls
Filename search functions