BinData Tcl Reference Documentation

BinData

Container for binary data. Provides methods for getting, setting, appending, etc. in binary and string encoded formats.

Object Creation

set myBinData [new CkBinData]

Properties

LastMethodSuccess (boolean 1/0)

set boolVal [CkBinData_get_LastMethodSuccess $myBinData]
CkBinData_put_LastMethodSuccess $myBinData $boolVal

Introduced in version 9.5.0.52

Indicate whether the last method call succeeded or failed. A value of 1 indicates success, a value of 0 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 = 1 and failure = 0.
  • 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 1. For example, a method that returns no value (such as a "void" in C++) will technically always succeed.

NumBytes (integer)

set intVal [CkBinData_get_NumBytes $myBinData]

Introduced in version 9.5.0.51

The number of bytes contained within the object.

Utf8 (boolean 1/0)

set boolVal [CkBinData_get_Utf8 $myBinData]
CkBinData_put_Utf8 $myBinData $boolVal

When set to 1, all "const char *" arguments are interpreted as utf-8 strings. If set to 0 (the default), then "const char *" arguments are interpreted as ANSI strings. Also, when set to 1, and Chilkat method returning a "const char *" is returning the utf-8 representation. If set to 0, all "const char *" return values are ANSI strings.

Methods

# binData is a CkBinData
set status [CkBinData_AppendBd $binData]

Introduced in version 9.5.0.62

Appends the contents of another BinData to this object.

Returns 1 for success, 0 for failure.

# data is a CkByteData
set status [CkBinData_AppendBinary $data]

Introduced in version 9.5.0.51

Appends binary data to the current contents, if any.

Returns 1 for success, 0 for failure.

# charset is a string
set status [CkBinData_AppendBom $charset]

Introduced in version 9.5.0.62

Appends the appropriate BOM (byte order mark), also known as a "preamble", for the given charset. If the charset has no defined BOM, then nothing is appended. An application would typically call this to append the utf-8, utf-16, or utf-32 BOM.

Returns 1 for success, 0 for failure.

StringBuilder to Bytes (in BinData)

# encData is a string
# encoding is a string
set status [CkBinData_AppendEncoded $encData $encoding]

Introduced in version 9.5.0.51

Appends encoded binary data to the current data. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns 1 for success, 0 for failure.

Demonstrate Binary Data Encoding Methods

# sb is a CkStringBuilder
# encoding is a string
set status [CkBinData_AppendEncodedSb $sb $encoding]

Introduced in version 9.5.0.62

Decodes the contents of sb and appends the decoded bytes to this object. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns 1 for success, 0 for failure.

# sb is a CkStringBuilder
# charset is a string
set status [CkBinData_AppendSb $sb $charset]

Introduced in version 9.5.0.62

Appends the contents of a StringBuilder to this object.

Returns 1 for success, 0 for failure.

StringBuilder to Bytes (in BinData)

# str is a string
# charset is a string
set status [CkBinData_AppendString $str $charset]

Introduced in version 9.5.0.62

Appends a string to this object. (This does not append the BOM. If a BOM is required, the AppendBom method can be called to append the appropriate BOM.)

Returns 1 for success, 0 for failure.

Appending Strings to BinData

set status [CkBinData_Clear]

Introduced in version 9.5.0.51

Clears the contents.

Returns 1 for success, 0 for failure.

# binData is a CkBinData
set retBool [CkBinData_ContentsEqual $binData]

Introduced in version 9.5.0.62

Return 1 if the contents of this object equals the contents of binData.

# outBytes is a CkByteData (output)
set status [CkBinData_GetBinary $outData]

Introduced in version 9.5.0.51

Retrieves the binary data contained within the object.

Returns 1 for success, 0 for failure.

# offset is an integer
# numBytes is an integer
# outBytes is a CkByteData (output)
set status [CkBinData_GetBinaryChunk $offset $numBytes $outData]

Introduced in version 9.5.0.51

Retrieves a chunk of the binary data contained within the object.

Returns 1 for success, 0 for failure.

# encoding is a string
# outStr is a CkString (output)
set status [CkBinData_GetEncoded $encoding $outStr]
set retStr [CkBinData_getEncoded $myBinData $encoding]

Introduced in version 9.5.0.51

Retrieves the binary data as an encoded string. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns 1 for success, 0 for failure.

Demonstrate Binary Data Encoding Methods

Determine File Type from Binary Content of File

# offset is an integer
# numBytes is an integer
# encoding is a string
# outStr is a CkString (output)
set status [CkBinData_GetEncodedChunk $offset $numBytes $encoding $outStr]
set retStr [CkBinData_getEncodedChunk $myBinData $offset $numBytes $encoding]

Introduced in version 9.5.0.51

Retrieves a chunk of the binary data and returns it in encoded form. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns 1 for success, 0 for failure.

Demonstrate Binary Data Encoding Methods

# encoding is a string
# sb is a CkStringBuilder
set status [CkBinData_GetEncodedSb $encoding $sb]

Introduced in version 9.5.0.64

Writes the encoded data to a StringBuilder. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns 1 for success, 0 for failure.

Demonstrate Binary Data Encoding Methods

# charset is a string
# outStr is a CkString (output)
set status [CkBinData_GetString $charset $outStr]
set retStr [CkBinData_getString $myBinData $charset]

Introduced in version 9.5.0.67

Interprets the bytes according to charset and returns the string. The charset can be "utf-8", "utf-16", "ansi", "iso-8859-*", "windows-125*", or any of the supported character encodings listed in the link below.

Returns 1 for success, 0 for failure.

Chilkat Supported Character Encodings

# data is a CkByteData
set status [CkBinData_LoadBinary $data]

Introduced in version 9.5.0.51

Loads binary data and replaces the current contents, if any.

Returns 1 for success, 0 for failure.

# encData is a string
# encoding is a string
set status [CkBinData_LoadEncoded $encData $encoding]

Introduced in version 9.5.0.51

Loads binary data from an encoded string, replacing the current contents, if any. The encoding may be "Base64", "modBase64", "base64Url", "Base32", "Base58", "QP" (for quoted-printable), "URL" (for url-encoding), "Hex", or any of the encodings found at Chilkat Binary Encodings List.

Returns 1 for success, 0 for failure.

# path is a string
set status [CkBinData_LoadFile $path]

Introduced in version 9.5.0.51

Loads data from a file.

Returns 1 for success, 0 for failure.

# offset is an integer
# numBytes is an integer
set retBool [CkBinData_RemoveChunk $offset $numBytes]

Introduced in version 9.5.0.51

Removes a chunk of bytes from the binary data.

Demonstrate Binary Data Encoding Methods

set status [CkBinData_SecureClear]

Introduced in version 9.5.0.67

Securely clears the contents by writing 0 bytes to the memory prior to deallocating the internal memory.

Returns 1 for success, 0 for failure.

# path is a string
set status [CkBinData_WriteFile $path]

Introduced in version 9.5.0.62

Writes the contents to a file.

Returns 1 for success, 0 for failure.