BinData Node.js Reference Documentation

BinData

Current Version: 9.5.0.97

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

Object Creation

var obj = new chilkat.BinData();

Properties

LastMethodSuccess
LastMethodSuccess
· boolean

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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NumBytes
NumBytes
· integer, read-only
Introduced in version 9.5.0.51

The number of bytes contained within the object.

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Methods

AppendBd
var status = AppendBd(binData);
· Returns Boolean (true for success, false for failure).
· binData BinData
Introduced in version 9.5.0.62

Appends the contents of another BinData to this object.

Returns true for success, false for failure.

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AppendBinary
var status = AppendBinary(data);
· Returns Boolean (true for success, false for failure).
· data Buffer
Introduced in version 9.5.0.51

Appends binary data to the current contents, if any.

Returns true for success, false for failure.

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AppendBom
var status = AppendBom(charset);
· Returns Boolean (true for success, false for failure).
· charset String
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 true for success, false for failure.

More Information and Examples
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AppendByte
var status = AppendByte(byteValue);
· Returns Boolean (true for success, false for failure).
· byteValue Number
Introduced in version 9.5.0.77

Appends a single byte. The byteValue should be a value from 0 to 255.

Returns true for success, false for failure.

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AppendCountedString
var status = AppendCountedString(numCountBytes, bigEndian, str, charset);
· Returns Boolean (true for success, false for failure).
· numCountBytes Number
· bigEndian Boolean
· str String
· charset String
Introduced in version 9.5.0.91

Appends a byte count followed by the string in the desired character encoding, such as "utf-8". The numCountBytes is the size in bytes of the integer to represent the byte count. If 0, then a minimal number of bytes is used. If bigEndian is true, the byte count is appended in big endian byte ordering, otherwise little-ending byte ordering. The str is the string to be appended. The charset is the character encoding, such as "utf-8", "utf-16", "windows-1252", etc.

Returns true for success, false for failure.

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AppendEncoded
var status = AppendEncoded(encData, encoding);
· Returns Boolean (true for success, false for failure).
· encData String
· encoding String
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 true for success, false for failure.

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AppendEncodedSb
var status = AppendEncodedSb(sb, encoding);
· Returns Boolean (true for success, false for failure).
· sb StringBuilder
· encoding String
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 true for success, false for failure.

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AppendInt2
var status = AppendInt2(value, littleEndian);
· Returns Boolean (true for success, false for failure).
· value Number
· littleEndian Boolean
Introduced in version 9.5.0.77

Appends a 16-bit integer (2 bytes). If littleEndian is true, then the integer bytes are appended in little-endian byte order, otherwise big-endian byte order is used.

Returns true for success, false for failure.

More Information and Examples
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AppendInt4
var status = AppendInt4(value, littleEndian);
· Returns Boolean (true for success, false for failure).
· value Number
· littleEndian Boolean
Introduced in version 9.5.0.77

Appends a 32-bit integer (4 bytes). If littleEndian is true, then the integer bytes are appended in little-endian byte order, otherwise big-endian byte order is used.

Returns true for success, false for failure.

More Information and Examples
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AppendPadded
var status = AppendPadded(str, charset, padWithSpace, fieldLen);
· Returns Boolean (true for success, false for failure).
· str String
· charset String
· padWithSpace Boolean
· fieldLen Number
Introduced in version 9.5.0.80

Appends a string to this object, padded to the fieldLen with NULL or SPACE chars. If padWithSpace is true, then SPACE chars are used and the string is not null-terminated. If fieldLen is false, then null bytes are used. The charset controls the byte representation to use, such as "utf-8".

Note: This call will always append a total number of bytes equal to fieldLen. If the str is longer than fieldLen, the method returns false to indicate failure and nothing is appended.

Returns true for success, false for failure.

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AppendSb
var status = AppendSb(sb, charset);
· Returns Boolean (true for success, false for failure).
· sb StringBuilder
· charset String
Introduced in version 9.5.0.62

Appends the contents of a StringBuilder to this object.

Returns true for success, false for failure.

More Information and Examples
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AppendString
var status = AppendString(str, charset);
· Returns Boolean (true for success, false for failure).
· str String
· charset String
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 true for success, false for failure.

More Information and Examples
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Clear
var status = Clear();
· Returns Boolean (true for success, false for failure).
Introduced in version 9.5.0.51

Clears the contents.

Returns true for success, false for failure.

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ContentsEqual
var retBool = ContentsEqual(binData);
· Returns a Boolean.
· binData BinData
Introduced in version 9.5.0.62

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

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FindString
var retInt = FindString(str, startIdx, charset);
· Returns a Number.
· str String
· startIdx Number
· charset String
Introduced in version 9.5.0.85

Return the index where the first occurrence of str is found. Return -1 if not found. The startIdx indicates the byte index where the search begins. The charset specifies the byte representation of str that is to be searched. For example, it can be "utf-8", "windows-1252", "ansi", "utf-16", etc.

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GetBinary
var retBuf = GetBinary();
· Returns a Buffer.
Introduced in version 9.5.0.51

Retrieves the binary data contained within the object.

Returns null on failure

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GetBinaryChunk
var retBuf = GetBinaryChunk(offset, numBytes);
· Returns a Buffer.
Introduced in version 9.5.0.51

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

Returns null on failure

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GetByte
var retInt = GetByte(index);
· Returns a Number.
· index Number
Introduced in version 9.5.0.92

Returns the value of the byte at the given index. The returned value is an integer from 0 to 255.

Returns true for success, false for failure.

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GetEncoded
var retStr = GetEncoded(encoding);
· Returns a String.
· encoding String
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 null on failure

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GetEncodedChunk
var retStr = GetEncodedChunk(offset, numBytes, encoding);
· Returns a String.
· offset Number
· numBytes Number
· encoding String
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 null on failure

More Information and Examples
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GetEncodedSb
var status = GetEncodedSb(encoding, sb);
· Returns Boolean (true for success, false for failure).
· encoding String
· sb StringBuilder
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 true for success, false for failure.

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GetHash
var retStr = GetHash(algorithm, encoding);
· Returns a String.
· algorithm String
· encoding String
Introduced in version 9.5.0.91

Returns the hash of the contents of this object. The algorithm is the hash algorithm, and can be "sha1", "sha256", "sha384", "sha512", "sha3-224", "sha3-256", "sha3-384", "sha3-512", "md2", "md5", "ripemd128", "ripemd160","ripemd256", or "ripemd320". The encoding can be "base64", "modBase64", "base64Url", "base32", "base58", "qp" (for quoted-printable), "url" (for url-encoding), "hex", "hexLower", or any of the encodings found at Chilkat Binary Encodings List.

Returns null on failure

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GetInt2
var retInt = GetInt2(index, littleEndian);
· Returns a Number.
· index Number
· littleEndian Boolean
Introduced in version 9.5.0.88

Returns the value of the 16-bit signed integer stored in big-endian or little-endian byte ordering at the given index.

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GetInt4
var retInt = GetInt4(index, littleEndian);
· Returns a Number.
· index Number
· littleEndian Boolean
Introduced in version 9.5.0.88

Returns the value of the 32-bit signed integer stored in big-endian or little-endian byte ordering at the given index.

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GetString
var retStr = GetString(charset);
· Returns a String.
· charset String
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 null on failure

More Information and Examples
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GetTextChunk
var retStr = GetTextChunk(startIdx, numBytes, charset);
· Returns a String.
· startIdx Number
· numBytes Number
· charset String
Introduced in version 9.5.0.85

Returns numBytes bytes starting at startIdx. The bytes are interpreted according to charset (for example, "utf-8", "ansi", "utf-16", "windows-1252", etc.)

Returns null on failure

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GetUInt2
var = GetUInt2(index, littleEndian);
· index Number
· littleEndian Boolean
Introduced in version 9.5.0.88

Returns the value of the 16-bit unsigned integer stored in big-endian or little-endian byte ordering at the given index.

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GetUInt4
var = GetUInt4(index, littleEndian);
· index Number
· littleEndian Boolean
Introduced in version 9.5.0.88

Returns the value of the 32-bit unsigned integer stored in big-endian or little-endian byte ordering at the given index.

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LoadBinary
var status = LoadBinary(data);
· Returns Boolean (true for success, false for failure).
· data Buffer
Introduced in version 9.5.0.51

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

Returns true for success, false for failure.

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LoadEncoded
var status = LoadEncoded(encData, encoding);
· Returns Boolean (true for success, false for failure).
· encData String
· encoding String
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 true for success, false for failure.

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LoadFile
var status = LoadFile(path);
· Returns Boolean (true for success, false for failure).
· path String
Introduced in version 9.5.0.51

Loads data from a file.

Returns true for success, false for failure.

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RemoveByteVal
RemoveByteVal(value);
· Does not return anything (returns Undefined).
· value Number
Introduced in version 9.5.0.90

Removes bytes having a specified value (0-255). For example, to remove all null bytes, pass 0 in value.

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RemoveChunk
var retBool = RemoveChunk(offset, numBytes);
· Returns a Boolean.
· offset Number
· numBytes Number
Introduced in version 9.5.0.51

Removes a chunk of bytes from the binary data.

More Information and Examples
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SecureClear
var status = SecureClear();
· Returns Boolean (true for success, false for failure).
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 true for success, false for failure.

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WriteAppendFile
var status = WriteAppendFile(path);
· Returns Boolean (true for success, false for failure).
· path String
Introduced in version 9.5.0.91

Appends the contents of this object to a file.

Returns true for success, false for failure.

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WriteFile
var status = WriteFile(path);
· Returns Boolean (true for success, false for failure).
· path String
Introduced in version 9.5.0.62

Writes the contents to a file.

Returns true for success, false for failure.

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