ZipEntry Unicode C Reference Documentation

ZipEntry

Represents a single file or directory entry within a Chilkat Zip object. A zip entry can be one of 5 types (see the description of the EntryType property below).

Create/Dispose

HCkZipEntryW CkZipEntryW_Create(void);

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

void CkZipEntryW_Dispose(HCkZipEntryW handle);

Objects created by calling CkZipEntryW_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 CkZipEntryW_Dispose.

Callback Functions

Callback Functions are Introduced in Chilkat v9.5.0.56

void CkZipEntryW_setAbortCheck(HCkHttp cHandle, BOOL (*fnAbortCheck)());

Provides the opportunity for a method call to be aborted. If TRUE is returned, the operation in progress is aborted. Return FALSE to allow the current method call to continue. This callback function is called periodically based on the value of the HeartbeatMs property. (If HeartbeatMs is 0, then no callbacks are made.) As an example, to make 5 AbortCheck callbacks per second, set the HeartbeatMs property equal to 200.

C Example using Callback Functions

void CkZipEntryW_setPercentDone(HCkHttp cHandle, BOOL (*fnPercentDone)(int pctDone));

Provides the percentage completed for any method that involves network communications or time-consuming processing (assuming it is a method where a percentage completion can be measured). This callback is only called when it is possible to know a percentage completion, and when it makes sense to express the operation as a percentage completed. The pctDone argument will have a value from 1 to 100. For methods that complete very quickly, the number of PercentDone callbacks will vary, but the final callback should have a value of 100. For long running operations, no more than one callback per percentage point will occur (for example: 1, 2, 3, ... 98, 99, 100).

This callback counts as an AbortCheck callback, and takes the place of the AbortCheck event when it fires.

The return value indicates whether the method call should be aborted, or whether it should proceed. Return TRUE to abort, and FALSE to proceed.

void CkZipEntryW_setProgressInfo(HCkHttp cHandle, void (*fnProgressInfo)(const wchar_t *name, const wchar_t *value));

This is a general callback that provides name/value information about what is happening at certain points during a method call. To see the information provided in ProgressInfo callbacks, if any, write code to handle this event and log the name/value pairs. Most are self-explanatory.

void CkZipEntryW_setTaskCompleted(HCkHttp cHandle, void (*fnTaskCompleted)(HCkTask hTask));

Called in the background thread when an asynchronous task completes. (Note: When an async method is running, all callbacks are in the background thread.)

Properties

void CkZipEntryW_getComment(HCkZipEntryW cHandle, HCkString retval);

void CkZipEntryW_putComment(HCkZipEntryW cHandle, const wchar_t *newVal);

const wchar_t *CkZipEntryW_comment(HCkZipEntryW cHandle);

The comment stored within the Zip for this entry.

unsigned long CkZipEntryW_getCompressedLength(HCkZipEntryW cHandle);

The size in bytes of this entry's file data when compression is applied

__int64 CkZipEntryW_getCompressedLength64(HCkZipEntryW cHandle);

The size in bytes of this entry's file data when compression is applied

void CkZipEntryW_getCompressedLengthStr(HCkZipEntryW cHandle, HCkString retval);

const wchar_t *CkZipEntryW_compressedLengthStr(HCkZipEntryW cHandle);

The size in decimal string format of this file when Zip compression is applied.

int CkZipEntryW_getCompressionLevel(HCkZipEntryW cHandle);

void CkZipEntryW_putCompressionLevel(HCkZipEntryW cHandle, int newVal);

The compression level. 0 = no compression, while 9 = maximum compression. The default is 6.

int CkZipEntryW_getCompressionMethod(HCkZipEntryW cHandle);

void CkZipEntryW_putCompressionMethod(HCkZipEntryW cHandle, int newVal);

Set to 0 for no compression, or 8 for the Deflate algorithm. The Deflate algorithm is the default algorithm of the most popular Zip utility programs, such as WinZip

int CkZipEntryW_getCrc(HCkZipEntryW cHandle);

The CRC for the zip entry. For AES encrypted entries, the CRC value will be 0. (See http://www.winzip.com/aes_info.htm#CRC )

void CkZipEntryW_getDebugLogFilePath(HCkZipEntryW cHandle, HCkString retval);

void CkZipEntryW_putDebugLogFilePath(HCkZipEntryW cHandle, const wchar_t *newVal);

const wchar_t *CkZipEntryW_debugLogFilePath(HCkZipEntryW 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.

int CkZipEntryW_getEncryptionKeyLen(HCkZipEntryW cHandle);

Introduced in version 9.5.0.69

If this entry is AES encrypted, then this property contains the AES key length (128, 192, or 256). If the entry is not AES encrypted, then the value is 0.

int CkZipEntryW_getEntryID(HCkZipEntryW cHandle);

The unique ID assigned by Zip.NET while the object is instantiated in memory.

int CkZipEntryW_getEntryType(HCkZipEntryW cHandle);

Indicates the origin of the entry. There are three possible values:

  1. Mapped Entry: An entry in an existing Zip file.
  2. File Entry: A file not yet in memory, but referenced. These entries are added by calling AppendFiles, AppendFilesEx, AppendOneFileOrDir, etc.
  3. Data Entry: An entry containing uncompressed data from memory. These entries are added by calling AppendData, AppendString, etc.
  4. Null Entry: An entry that no longer exists in the .zip.
  5. New Directory Entry: A directory entry added by calling AppendNewDir.
When the zip is written by calling WriteZip or WriteToMemory, all of the zip entries are transformed into mapped entries. They become entries that contain the compressed data within the .zip that was just created. (The WriteZip method call effectively writes the zip and then opens it, replacing all of the existing entries with mapped entries.)

SYSTEMTIME * CkZipEntryW_getFileDateTime(HCkZipEntryW cHandle);

void CkZipEntryW_putFileDateTime(HCkZipEntryW cHandle, SYSTEMTIME *newVal);

This property is deprecated. It will be removed in a future version.

The local last-modified date/time.

void CkZipEntryW_getFileDateTimeStr(HCkZipEntryW cHandle, HCkString retval);

void CkZipEntryW_putFileDateTimeStr(HCkZipEntryW cHandle, const wchar_t *newVal);

const wchar_t *CkZipEntryW_fileDateTimeStr(HCkZipEntryW cHandle);

The local last-modified date/time in RFC822 string format.

void CkZipEntryW_getFileName(HCkZipEntryW cHandle, HCkString retval);

void CkZipEntryW_putFileName(HCkZipEntryW cHandle, const wchar_t *newVal);

const wchar_t *CkZipEntryW_fileName(HCkZipEntryW cHandle);

The file name of the Zip entry.

Set Entry Filepath (in output Zip) when Zipping

void CkZipEntryW_getFileNameHex(HCkZipEntryW cHandle, HCkString retval);

const wchar_t *CkZipEntryW_fileNameHex(HCkZipEntryW cHandle);

A string containing the hex encoded raw filename bytes found in the Zip entry.

int CkZipEntryW_getHeartbeatMs(HCkZipEntryW cHandle);

void CkZipEntryW_putHeartbeatMs(HCkZipEntryW cHandle, int newVal);

The number of milliseconds between each AbortCheck event callback. The AbortCheck callback allows an application to abort inflate/extract/unzip calls prior to completion. If HeartbeatMs is 0 (the default), no AbortCheck event callbacks will fire.

BOOL CkZipEntryW_getIsAesEncrypted(HCkZipEntryW cHandle);

Introduced in version 9.5.0.69

TRUE if the entry is AES encrypted. This property can only be TRUE for entries already contained in a .zip (i.e. entries obtained from a zip archive that was opened via OpenZip, OpenBd, OpenFromMemory, etc.) The property is FALSE if the entry contained in the zip is not AES encrypted.

BOOL CkZipEntryW_getIsDirectory(HCkZipEntryW cHandle);

True if the Zip entry is a directory, false if it is a file.

void CkZipEntryW_getLastErrorHtml(HCkZipEntryW cHandle, HCkString retval);

const wchar_t *CkZipEntryW_lastErrorHtml(HCkZipEntryW 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.

void CkZipEntryW_getLastErrorText(HCkZipEntryW cHandle, HCkString retval);

const wchar_t *CkZipEntryW_lastErrorText(HCkZipEntryW 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.

Concept of LastErrorText

LastErrorText Standard Information

void CkZipEntryW_getLastErrorXml(HCkZipEntryW cHandle, HCkString retval);

const wchar_t *CkZipEntryW_lastErrorXml(HCkZipEntryW 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.

BOOL CkZipEntryW_getLastMethodSuccess(HCkZipEntryW cHandle);

void CkZipEntryW_putLastMethodSuccess(HCkZipEntryW 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.

BOOL CkZipEntryW_getTextFlag(HCkZipEntryW cHandle);

void CkZipEntryW_putTextFlag(HCkZipEntryW cHandle, BOOL newVal);

Controls whether the "text flag" of the internal file attributes for this entry within the zip is set. This is a bit flag that indicates whether the file contents are text or binary. It is for informational use and it is not imperative that this bit flag is accurately set. The ability to set this bit flag is only provided to satisfy certain cases where another application might be sensitive to the flag.

unsigned long CkZipEntryW_getUncompressedLength(HCkZipEntryW cHandle);

The size in bytes of this entry's file data when uncompressed.

__int64 CkZipEntryW_getUncompressedLength64(HCkZipEntryW cHandle);

The size in bytes of this entry's file data when uncompressed.

void CkZipEntryW_getUncompressedLengthStr(HCkZipEntryW cHandle, HCkString retval);

const wchar_t *CkZipEntryW_uncompressedLengthStr(HCkZipEntryW cHandle);

The size in bytes (in decimal string format) of this zip entry's data when uncompressed.

BOOL CkZipEntryW_getVerboseLogging(HCkZipEntryW cHandle);

void CkZipEntryW_putVerboseLogging(HCkZipEntryW 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.

void CkZipEntryW_getVersion(HCkZipEntryW cHandle, HCkString retval);

const wchar_t *CkZipEntryW_version(HCkZipEntryW cHandle);

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

Methods

BOOL CkZipEntryW_AppendData(HCkZipEntryW cHandle, const unsigned char * inData);

Appends binary data to the zip entry's file contents.

Returns TRUE for success, FALSE for failure.

HCkTaskW CkZipEntryW_AppendDataAsync(HCkZipEntryW cHandle, const unsigned char * inData);

Creates an asynchronous task to call the AppendData method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task

BOOL CkZipEntryW_AppendString(HCkZipEntryW cHandle, const wchar_t *strContent, const wchar_t *charset);

Appends text data to the zip entry's file contents. The text is appended using the character encoding specified by the charset, which can be "utf-8", "ansi", etc.

Returns TRUE for success, FALSE for failure.

HCkTaskW CkZipEntryW_AppendStringAsync(HCkZipEntryW cHandle, const wchar_t *strContent, const wchar_t *charset);

Creates an asynchronous task to call the AppendString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task

BOOL CkZipEntryW_Copy(HCkZipEntryW cHandle, const unsigned char * outData);

Returns the compressed data as a byte array.

Note: The Copy method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry"). This is the case when an existing .zip is opened (from memory or from a file), or after the .zip has been written (by calling WriteZip or WriteToMemory). If a zip entry is created via AppendData, AppendFiles, etc., then it does not yet contain compressed data. When the zip is written, each entry becomes a "mapped entry" (The value of the EntryType property becomes 0.)

Returns TRUE for success, FALSE for failure.

BOOL CkZipEntryW_CopyToBase64(HCkZipEntryW cHandle, const wchar_t *outStr);

const wchar_t *CkZipEntryW_copyToBase64(HCkZipEntryW cHandle);

Returns the compressed data as a Base64-encoded string. It is only possible to retrieve the compressed data from a pre-existing .zip that has been opened or after writing the .zip but not closing it.

Note: The CopyToBase64 method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry").

Returns TRUE for success, FALSE for failure.

BOOL CkZipEntryW_CopyToHex(HCkZipEntryW cHandle, const wchar_t *outStr);

const wchar_t *CkZipEntryW_copyToHex(HCkZipEntryW cHandle);

Returns the compressed data as a hexidecimal encoded string. It is only possible to retrieve the compressed data from a pre-existing .zip that has been opened or after writing the .zip but not closing it.

Note: The CopyToBase64 method can only be called if the zip entry already contains compressed data (i.e. it is a "mapped entry").

Returns TRUE for success, FALSE for failure.

BOOL CkZipEntryW_Extract(HCkZipEntryW cHandle, const wchar_t *dirPath);

Unzips this entry into the specified base directory. The file is unzipped to the subdirectory according to the relative path stored with the entry in the Zip. Use ExtractInto to unzip into a specific directory regardless of the path information stored in the Zip.

Returns TRUE for success, FALSE for failure.

HCkTaskW CkZipEntryW_ExtractAsync(HCkZipEntryW cHandle, const wchar_t *dirPath);

Creates an asynchronous task to call the Extract method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task

BOOL CkZipEntryW_ExtractInto(HCkZipEntryW cHandle, const wchar_t *dirPath);

Unzip a file into a specific directory

Returns TRUE for success, FALSE for failure.

HCkTaskW CkZipEntryW_ExtractIntoAsync(HCkZipEntryW cHandle, const wchar_t *dirPath);

Creates an asynchronous task to call the ExtractInto method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task

HCkDateTimeW CkZipEntryW_GetDt(HCkZipEntryW cHandle);

Returns the last-modified date/time of this zip entry.

Returns NULL on failure

BOOL CkZipEntryW_Inflate(HCkZipEntryW cHandle, const unsigned char * outData);

Inflate a file within a Zip directly into memory.

Returns TRUE for success, FALSE for failure.

HCkTaskW CkZipEntryW_InflateAsync(HCkZipEntryW cHandle);

Creates an asynchronous task to call the Inflate method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task

HCkZipEntryW CkZipEntryW_NextEntry(HCkZipEntryW cHandle);

Return the next entry (file or directory) within the Zip

Returns NULL on failure

HCkZipEntryW CkZipEntryW_NextMatchingEntry(HCkZipEntryW cHandle, const wchar_t *matchStr);

Introduced in version 9.5.0.50

Returns the next entry having a filename matching the matchStr. The "*" characters matches 0 or more of any character. The full filename, including path, is used when matching against the pattern.

Returns NULL on failure

Iterate over Matching Filenames

BOOL CkZipEntryW_ReplaceData(HCkZipEntryW cHandle, const unsigned char * inData);

Replaces the zip entry's existing contents with new data.

Returns TRUE for success, FALSE for failure.

BOOL CkZipEntryW_ReplaceString(HCkZipEntryW cHandle, const wchar_t *strContent, const wchar_t *charset);

Replaces the zip entry's existing contents with new text data. The text will be stored using the character encoding as specified by charset, which can be "utf-8", "ansi", etc.

Returns TRUE for success, FALSE for failure.

Replace/Update a FIle in a .zip

BOOL CkZipEntryW_SaveLastError(HCkZipEntryW 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.

void CkZipEntryW_SetDt(HCkZipEntryW cHandle, HCkDateTimeW dt);

Sets the last-modified date/time for this zip entry.

BOOL CkZipEntryW_UnzipToBd(HCkZipEntryW cHandle, HCkBinDataW binData);

Introduced in version 9.5.0.67

Unzips the entry contents into the binData.

Returns TRUE for success, FALSE for failure.

HCkTaskW CkZipEntryW_UnzipToBdAsync(HCkZipEntryW cHandle, HCkBinDataW binData);

Introduced in version 9.5.0.67

Creates an asynchronous task to call the UnzipToBd method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task

BOOL CkZipEntryW_UnzipToSb(HCkZipEntryW cHandle, int lineEndingBehavior, const wchar_t *srcCharset, HCkStringBuilderW sb);

Introduced in version 9.5.0.67

Unzips a text file to the sb. The contents of sb are appended with the unzipped file. The lineEndingBehavior is as follows:

0 = leave unchanged.
1 = convert all to bare LF's
2 = convert all to CRLF's

The srcCharset tells the component how to interpret the bytes of the uncompressed file -- i.e. as utf-8, utf-16, windows-1252, etc.

Returns TRUE for success, FALSE for failure.

HCkTaskW CkZipEntryW_UnzipToSbAsync(HCkZipEntryW cHandle, int lineEndingBehavior, const wchar_t *srcCharset, HCkStringBuilderW sb);

Introduced in version 9.5.0.67

Creates an asynchronous task to call the UnzipToSb method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task

BOOL CkZipEntryW_UnzipToStream(HCkZipEntryW cHandle, HCkStreamW toStream);

Introduced in version 9.5.0.67

Unzips a file within a Zip to a stream. If called synchronously, the toStream must have a sink, such as a file or another stream object. If called asynchronously, then the foreground thread can read the stream.

Returns TRUE for success, FALSE for failure.

Unzip Binary File to Stream

HCkTaskW CkZipEntryW_UnzipToStreamAsync(HCkZipEntryW cHandle, HCkStreamW toStream);

Introduced in version 9.5.0.67

Creates an asynchronous task to call the UnzipToStream method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

Unzip One File to a Stream

BOOL CkZipEntryW_UnzipToString(HCkZipEntryW cHandle, int lineEndingBehavior, const wchar_t *srcCharset, const wchar_t *outStr);

const wchar_t *CkZipEntryW_unzipToString(HCkZipEntryW cHandle, int lineEndingBehavior, const wchar_t *srcCharset);

Inflate and return the uncompressed data as a string The lineEndingBehavior is as follows:

0 = leave unchanged.
1 = convert all to bare LF's
2 = convert all to CRLF's

The srcCharset tells the component how to interpret the bytes of the uncompressed file -- i.e. as utf-8, utf-16, windows-1252, etc.

Returns TRUE for success, FALSE for failure.

Iterate over Matching Filenames

Download a Zip from a URL and OpenFromMemory. (No .zip fie is created)

HCkTaskW CkZipEntryW_UnzipToStringAsync(HCkZipEntryW cHandle, int lineEndingBehavior, const wchar_t *srcCharset);

Creates an asynchronous task to call the UnzipToString method with the arguments provided. (Async methods are available starting in Chilkat v9.5.0.52.)

Returns NULL on failure

How to Run an Asynchronous Task