llbson

package
v0.0.14 Latest Latest
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 Go to latest Published: Sep 20, 2018 License: Apache-2.0 Imports: 4 Imported by: 0

Documentation

Overview

Package llbson contains functions that can be used to encode and decode BSON elements and values to or from a slice of bytes. These functions are aimed at allowing low level manipulation of BSON and can be used to build a higher level BSON library.

The Read* functions within this package return the values of the element and a boolean indicating if the values are valid. A boolean was used instead of an error because any error that would be returned would be the same: not enough bytes. This library attempts to do no validation, it will only return false if there are not enough bytes for an item to be read. For example, the ReadDocument function checks the length, if that length is larger than the number of bytes availble, it will return false, if there are enough bytes, it will return those bytes and true. It is the consumers responsibility to validate those bytes.

The Append* functions within this package will append the type value to the given dst slice. If the slice has enough capacity, it will not grow the slice. The Append*Element functions within this package operate in the same way, but additionally append the BSON type and the key before the value.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

func AppendArray 

func AppendArray(dst []byte, arr []byte) []byte

AppendArray will append arr to dst and return the extended buffer.

func AppendArrayElement 

func AppendArrayElement(dst []byte, key string, arr []byte) []byte

AppendArrayElement will append a BSON array element using key and arr to dst and return the extended buffer.

func AppendBinary 

func AppendBinary(dst []byte, subtype byte, b []byte) []byte

AppendBinary will append subtype and b to dst and return the extended buffer.

func AppendBinaryElement 

func AppendBinaryElement(dst []byte, key string, subtype byte, b []byte) []byte

AppendBinaryElement will append a BSON binary element using key, subtype, and b to dst and return the extended buffer.

func AppendBoolean 

func AppendBoolean(dst []byte, b bool) []byte

AppendBoolean will append b to dst and return the extended buffer.

func AppendBooleanElement 

func AppendBooleanElement(dst []byte, key string, b bool) []byte

AppendBooleanElement will append a BSON boolean element using key and b to dst and return the extended buffer.

func AppendCodeWithScope 

func AppendCodeWithScope(dst []byte, code string, scope []byte) []byte

AppendCodeWithScope will append code and scope to dst and return the extended buffer.

func AppendCodeWithScopeElement 

func AppendCodeWithScopeElement(dst []byte, key, code string, scope []byte) []byte

AppendCodeWithScopeElement will append a BSON code with scope element using key, code, and scope to dst and return the extended buffer.

func AppendDBPointer 

func AppendDBPointer(dst []byte, ns string, oid objectid.ObjectID) []byte

AppendDBPointer will append ns and oid to dst and return the extended buffer.

func AppendDBPointerElement 

func AppendDBPointerElement(dst []byte, key, ns string, oid objectid.ObjectID) []byte

AppendDBPointerElement will append a BSON DBPointer element using key, ns, and oid to dst and return the extended buffer.

func AppendDateTime 

func AppendDateTime(dst []byte, dt int64) []byte

AppendDateTime will append dt to dst and return the extended buffer.

func AppendDateTimeElement 

func AppendDateTimeElement(dst []byte, key string, dt int64) []byte

AppendDateTimeElement will append a BSON datetime element using key and dt to dst and return the extended buffer.

func AppendDecimal128 

func AppendDecimal128(dst []byte, d128 decimal.Decimal128) []byte

AppendDecimal128 will append d128 to dst and return the extended buffer.

func AppendDecimal128Element 

func AppendDecimal128Element(dst []byte, key string, d128 decimal.Decimal128) []byte

AppendDecimal128Element will append a BSON decimal128 element using key and d128 to dst and return the extended buffer.

func AppendDocument 

func AppendDocument(dst []byte, doc []byte) []byte

AppendDocument will append doc to dst and return the extended buffer.

func AppendDocumentElement 

func AppendDocumentElement(dst []byte, key string, doc []byte) []byte

AppendDocumentElement will append a BSON embeded document element using key and doc to dst and return the extended buffer.

func AppendDouble 

func AppendDouble(dst []byte, f float64) []byte

AppendDouble will append f to dst and return the extended buffer.

func AppendDoubleElement 

func AppendDoubleElement(dst []byte, key string, f float64) []byte

AppendDoubleElement will append a BSON double element using key and f to dst and return the extended buffer.

func AppendHeader 

func AppendHeader(dst []byte, t Type, key string) []byte

AppendHeader will append Type t and key to dst and return the extended buffer.

func AppendInt32 

func AppendInt32(dst []byte, i32 int32) []byte

AppendInt32 will append i32 to dst and return the extended buffer.

func AppendInt32Element 

func AppendInt32Element(dst []byte, key string, i32 int32) []byte

AppendInt32Element will append a BSON int32 element using key and i32 to dst and return the extended buffer.

func AppendInt64 

func AppendInt64(dst []byte, i64 int64) []byte

AppendInt64 will append i64 to dst and return the extended buffer.

func AppendInt64Element 

func AppendInt64Element(dst []byte, key string, i64 int64) []byte

AppendInt64Element will append a BSON int64 element using key and i64 to dst and return the extended buffer.

func AppendJavaScript 

func AppendJavaScript(dst []byte, js string) []byte

AppendJavaScript will append js to dst and return the extended buffer.

func AppendJavaScriptElement 

func AppendJavaScriptElement(dst []byte, key, js string) []byte

AppendJavaScriptElement will append a BSON JavaScript element using key and js to dst and return the extended buffer.

func AppendKey 

func AppendKey(dst []byte, key string) []byte

AppendKey will append key to dst and return the extended buffer.

func AppendMaxKeyElement 

func AppendMaxKeyElement(dst []byte, key string) []byte

AppendMaxKeyElement will append a BSON max key element using key to dst and return the extended buffer.

func AppendMinKeyElement 

func AppendMinKeyElement(dst []byte, key string) []byte

AppendMinKeyElement will append a BSON min key element using key to dst and return the extended buffer.

func AppendNullElement 

func AppendNullElement(dst []byte, key string) []byte

AppendNullElement will append a BSON null element using key to dst and return the extended buffer.

func AppendObjectID 

func AppendObjectID(dst []byte, oid objectid.ObjectID) []byte

AppendObjectID will append oid to dst and return the extended buffer.

func AppendObjectIDElement 

func AppendObjectIDElement(dst []byte, key string, oid objectid.ObjectID) []byte

AppendObjectIDElement will append a BSON ObjectID element using key and oid to dst and return the extended buffer.

func AppendRegex 

func AppendRegex(dst []byte, pattern, options string) []byte

AppendRegex will append pattern and options to dst and return the extended buffer.

func AppendRegexElement 

func AppendRegexElement(dst []byte, key, pattern, options string) []byte

AppendRegexElement will append a BSON regex element using key, pattern, and options to dst and return the extended buffer.

func AppendString 

func AppendString(dst []byte, s string) []byte

AppendString will append s to dst and return the extended buffer.

func AppendStringElement 

func AppendStringElement(dst []byte, key, val string) []byte

AppendStringElement will append a BSON string element using key and val to dst and return the extended buffer.

func AppendSymbol 

func AppendSymbol(dst []byte, symbol string) []byte

AppendSymbol will append symbol to dst and return the extended buffer.

func AppendSymbolElement 

func AppendSymbolElement(dst []byte, key, symbol string) []byte

AppendSymbolElement will append a BSON symbol element using key and symbol to dst and return the extended buffer.

func AppendTimestamp 

func AppendTimestamp(dst []byte, t, i uint32) []byte

AppendTimestamp will append t and i to dst and return the extended buffer.

func AppendTimestampElement 

func AppendTimestampElement(dst []byte, key string, t, i uint32) []byte

AppendTimestampElement will append a BSON timestamp element using key, t, and i to dst and return the extended buffer.

func AppendType 

func AppendType(dst []byte, t Type) []byte

AppendType will append t to dst and return the extended buffer.

func AppendUndefinedElement 

func AppendUndefinedElement(dst []byte, key string) []byte

AppendUndefinedElement will append a BSON undefined element using key to dst and return the extended buffer.

func ReadArray 

func ReadArray(src []byte) ([]byte, bool)

ReadArray will read an array from src. If there are not enough bytes it will return false.

func ReadBinary 

func ReadBinary(src []byte) (subtype byte, bin []byte, ok bool)

ReadBinary will read a subtype and bin from src. If there are not enough bytes it will return false.

func ReadBoolean 

func ReadBoolean(src []byte) (bool, bool)

ReadBoolean will read a bool from src. If there are not enough bytes it will return false.

func ReadCodeWithScope 

func ReadCodeWithScope(src []byte) (code string, scope []byte, ok bool)

ReadCodeWithScope will read code and scope from src. If there are not enough bytes it will return false.

func ReadDBPointer 

func ReadDBPointer(src []byte) (ns string, oid objectid.ObjectID, ok bool)

ReadDBPointer will read a ns and oid from src. If there are not enough bytes it will return false.

func ReadDateTime 

func ReadDateTime(src []byte) (int64, bool)

ReadDateTime will read an int64 datetime from src. If there are not enough bytes it will return false.

func ReadDecimal128 

func ReadDecimal128(src []byte) (decimal.Decimal128, bool)

ReadDecimal128 will read a decimal.Decimal128 from src. If there are not enough bytes it will return false.

func ReadDocument 

func ReadDocument(src []byte) ([]byte, bool)

ReadDocument will read a document from src. If there are not enough bytes it will return false.

func ReadDouble 

func ReadDouble(src []byte) (float64, bool)

ReadDouble will read a float64 from src. If there are not enough bytes it will return false.

func ReadInt32 

func ReadInt32(src []byte) (int32, bool)

ReadInt32 will read an int32 from src. If there are not enough bytes it will return false.

func ReadInt64 

func ReadInt64(src []byte) (int64, bool)

ReadInt64 will read an int64 from src. If there are not enough bytes it will return false.

func ReadJavaScript 

func ReadJavaScript(src []byte) (js string, ok bool)

ReadJavaScript will read a js string from src. If there are not enough bytes it will return false.

func ReadKey 

func ReadKey(src []byte) (string, bool)

ReadKey will return the first key in src. The 0x00 byte will not be present in the returned string. If there are not enough bytes available, false is returned.

func ReadObjectID 

func ReadObjectID(src []byte) (objectid.ObjectID, bool)

ReadObjectID will read an ObjectID from src. If there are not enough bytes it will return false.

func ReadRegex 

func ReadRegex(src []byte) (pattern, options string, ok bool)

ReadRegex will read a pattern and options from src. If there are not enough bytes it will return false.

func ReadString 

func ReadString(src []byte) (string, bool)

ReadString will read a string from src. If there are not enough bytes it will return false.

func ReadSymbol 

func ReadSymbol(src []byte) (symbol string, ok bool)

ReadSymbol will read a symbol string from src. If there are not enough bytes it will return false.

func ReadTimestamp 

func ReadTimestamp(src []byte) (t, i uint32, ok bool)

ReadTimestamp will read t and i from src. If there are not enough bytes it will return false.

Types

type Type 

type Type byte

Type represents a BSON type. 

const (
	TypeDouble           Type = 0x01
	TypeString           Type = 0x02
	TypeEmbeddedDocument Type = 0x03
	TypeArray            Type = 0x04
	TypeBinary           Type = 0x05
	TypeUndefined        Type = 0x06
	TypeObjectID         Type = 0x07
	TypeBoolean          Type = 0x08
	TypeDateTime         Type = 0x09
	TypeNull             Type = 0x0A
	TypeRegex            Type = 0x0B
	TypeDBPointer        Type = 0x0C
	TypeJavaScript       Type = 0x0D
	TypeSymbol           Type = 0x0E
	TypeCodeWithScope    Type = 0x0F
	TypeInt32            Type = 0x10
	TypeTimestamp        Type = 0x11
	TypeInt64            Type = 0x12
	TypeDecimal128       Type = 0x13
	TypeMinKey           Type = 0xFF
	TypeMaxKey           Type = 0x7F
)

These constants uniquely refer to each BSON type.

func ReadHeader 

func ReadHeader(src []byte) (t Type, key string, ok bool)

ReadHeader will return the type byte and the key in src. If both of these values cannot be read, false is returned.

func ReadType 

func ReadType(src []byte) (Type, bool)

ReadType will return the first byte of the provided []byte as a type. If there is no availble byte, false is returned.

func (Type) String 

func (bt Type) String() string

String returns the string representation of the BSON type's name.

Source Files

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