DirTree Unicode C Reference Documentation

DirTree

Current Version: 9.5.0.73

API for iterating over the files and sub-directories in a directory tree. The intent of this class is to provide a simplified, non-recursive way to iterate over an entire directory tree.

Create/Dispose

HCkDirTreeW instance = CkDirTreeW_Create();
// ...
CkDirTreeW_Dispose(instance);
HCkDirTreeW CkDirTreeW_Create(void);

Creates an instance of the HCkDirTreeW object and returns a handle ("void *" pointer). The handle is passed in the 1st argument for the functions listed on this page.

void CkDirTreeW_Dispose(HCkDirTreeW handle);

Objects created by calling CkDirTreeW_Create must be freed by calling this method. A memory leak occurs if a handle is not disposed by calling this function. Also, any handle returned by a Chilkat "C" function must also be freed by the application by calling the appropriate Dispose method, such as CkDirTreeW_Dispose.

Properties

BaseDir
void CkDirTreeW_getBaseDir(HCkDirTreeW cHandle, HCkString retval);
void CkDirTreeW_putBaseDir(HCkDirTreeW cHandle, const wchar_t *newVal);
const wchar_t *CkDirTreeW_baseDir(HCkDirTreeW cHandle);

Begin iterating from this directory.

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DebugLogFilePath
void CkDirTreeW_getDebugLogFilePath(HCkDirTreeW cHandle, HCkString retval);
void CkDirTreeW_putDebugLogFilePath(HCkDirTreeW cHandle, const wchar_t *newVal);
const wchar_t *CkDirTreeW_debugLogFilePath(HCkDirTreeW cHandle);

If set to a file path, causes each Chilkat method or property call to automatically append it's LastErrorText to the specified log file. The information is appended such that if a hang or crash occurs, it is possible to see the context in which the problem occurred, as well as a history of all Chilkat calls up to the point of the problem. The VerboseLogging property can be set to provide more detailed information.

This property is typically used for debugging the rare cases where a Chilkat method call hangs or generates an exception that halts program execution (i.e. crashes). A hang or crash should generally never happen. The typical causes of a hang are:

  1. a timeout related property was set to 0 to explicitly indicate that an infinite timeout is desired,
  2. the hang is actually a hang within an event callback (i.e. it is a hang within the application code), or
  3. there is an internal problem (bug) in the Chilkat code that causes the hang.

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DoneIterating
BOOL CkDirTreeW_getDoneIterating(HCkDirTreeW cHandle);

Set to TRUE when the last file or sub-directory has been iterated.

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FileSize32
int CkDirTreeW_getFileSize32(HCkDirTreeW cHandle);

The file size of the current file in the iteration. (0 if it is a directory.)

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FileSize64
__int64 CkDirTreeW_getFileSize64(HCkDirTreeW cHandle);

The file size as a 64-bit integer of the current file in the iteration. (0 if it is a directory.)

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FullPath
void CkDirTreeW_getFullPath(HCkDirTreeW cHandle, HCkString retval);
const wchar_t *CkDirTreeW_fullPath(HCkDirTreeW cHandle);

The absolute directory path of the current file or sub-directory.

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FullUncPath
void CkDirTreeW_getFullUncPath(HCkDirTreeW cHandle, HCkString retval);
const wchar_t *CkDirTreeW_fullUncPath(HCkDirTreeW cHandle);

The absolute UNC directory path of the current file or sub-directory.

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IsDirectory
BOOL CkDirTreeW_getIsDirectory(HCkDirTreeW cHandle);

TRUE if the current position is a sub-directory, FALSE if it is a file.

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LastErrorHtml
void CkDirTreeW_getLastErrorHtml(HCkDirTreeW cHandle, HCkString retval);
const wchar_t *CkDirTreeW_lastErrorHtml(HCkDirTreeW cHandle);

Provides information in HTML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorText
void CkDirTreeW_getLastErrorText(HCkDirTreeW cHandle, HCkString retval);
const wchar_t *CkDirTreeW_lastErrorText(HCkDirTreeW cHandle);

Provides information in plain-text format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastErrorXml
void CkDirTreeW_getLastErrorXml(HCkDirTreeW cHandle, HCkString retval);
const wchar_t *CkDirTreeW_lastErrorXml(HCkDirTreeW cHandle);

Provides information in XML format about the last method/property called. If a method call returns a value indicating failure, or behaves unexpectedly, examine this property to get more information.

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LastMethodSuccess
BOOL CkDirTreeW_getLastMethodSuccess(HCkDirTreeW cHandle);
void CkDirTreeW_putLastMethodSuccess(HCkDirTreeW cHandle, BOOL newVal);
Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of TRUE indicates success, a value of FALSE indicates failure. This property is automatically set for method calls. It is not modified by property accesses. The property is automatically set to indicate success for the following types of method calls:

  • Any method that returns a string.
  • Any method returning a Chilkat object, binary bytes, or a date/time.
  • Any method returning a standard boolean status value where success = TRUE and failure = FALSE.
  • Any method returning an integer where failure is defined by a return value less than zero.

Note: Methods that do not fit the above requirements will always set this property equal to TRUE. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

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Recurse
BOOL CkDirTreeW_getRecurse(HCkDirTreeW cHandle);
void CkDirTreeW_putRecurse(HCkDirTreeW cHandle, BOOL newVal);

If TRUE, the iteration will be recursive. If FALSE the iteration is non-recursive. The default value is TRUE.

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RelativePath
void CkDirTreeW_getRelativePath(HCkDirTreeW cHandle, HCkString retval);
const wchar_t *CkDirTreeW_relativePath(HCkDirTreeW cHandle);

The relative directory path of the current file or sub-directory. (Relative to the BaseDir)

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VerboseLogging
BOOL CkDirTreeW_getVerboseLogging(HCkDirTreeW cHandle);
void CkDirTreeW_putVerboseLogging(HCkDirTreeW cHandle, BOOL newVal);

If set to TRUE, then the contents of LastErrorText (or LastErrorXml, or LastErrorHtml) may contain more verbose information. The default value is FALSE. Verbose logging should only be used for debugging. The potentially large quantity of logged information may adversely affect peformance.

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Version
void CkDirTreeW_getVersion(HCkDirTreeW cHandle, HCkString retval);
const wchar_t *CkDirTreeW_version(HCkDirTreeW cHandle);

Version of the component/library, such as "9.5.0.63"

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Methods

AdvancePosition
BOOL CkDirTreeW_AdvancePosition(HCkDirTreeW cHandle);

Advances the current position in the directory tree traversal to the next file or sub-directory.

Important: If AdvancePosition returns FALSE, it can be an error, or it could be that there are no more files and directories. To distinguish between the two cases, examine the DoneIterating property. If DoneIterating is TRUE, then the FALSE return value is not an error, but instead indicates that the end has been reached.

Returns TRUE for success, FALSE for failure.

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BeginIterate
BOOL CkDirTreeW_BeginIterate(HCkDirTreeW cHandle);

Begins a directory tree traversal. After calling this method, the various property values such as Fullpath, FileSize32, etc. can be retrieved for the 1st file / sub-directory in the traversal.

Important: If BeginIterate returns FALSE, it can be an error, or it could be that there are 0 files and directories. To distinguish between the two cases, examine the DoneIterating property. If DoneIterating is TRUE, then the FALSE return value is not an error, but instead indicates 0 files/directories.

Returns TRUE for success, FALSE for failure.

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SaveLastError
BOOL CkDirTreeW_SaveLastError(HCkDirTreeW cHandle, const wchar_t *path);

Saves the last-error information (the contents of LastErrorXml) to an XML formatted file.

Returns TRUE for success, FALSE for failure.

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