base64VLQ

Full name Microsoft.VisualBasic.ApplicationServices.Development.VisualStudio.SourceMap.base64VLQ Assembly Microsoft.VisualBasic.ApplicationServices.Development.VisualStudio Members 10

VLQ编码

https://github.com/mozilla/source-map/blob/master/lib/base64-vlq.js

01 Syntax

Microsoft.VisualBasic.ApplicationServices.Development.VisualStudio.SourceMap.base64VLQ

02 Methods

Name	Overloads	Summary
toVLQSigned	1	Converts from a two-complement value to a value where the sign bit Is placed in the least significant bit.
fromVLQSigned	1	Converts to a two-complement value from a value where the sign bit Is Is placed in the least significant bit.
base64VLQ_decode	2	Decodes the next VLQValue from the provided chars.
base64VLQ_encode	1
getIntegers	1

03 Fields

Name	Overloads	Summary
VLQ_BASE_SHIFT	1	A single base 64 digit can contain 6 bits of data.
VLQ_BASE	1	binary 100000
VLQ_BASE_MASK	1	binary 011111
VLQ_CONTINUATION_BIT	1	binary 100000

04 Members

method toVLQSigned #

toVLQSigned(Int32)

Converts from a two-complement value to a value where the sign bit Is placed in the least significant bit.

For example, as decimals:

1 becomes 2 (10 binary), -1 becomes 3 (11 binary)
2 becomes 4 (100 binary), -2 becomes 5 (101 binary)

Parameters

Name	Type	Description
`a`	`Int32`	-

method fromVLQSigned #

fromVLQSigned(Int32)

Converts to a two-complement value from a value where the sign bit Is Is placed in the least significant bit.

For example, as decimals:

2 (10 binary) becomes 1, 3 (11 binary) becomes -1
4 (100 binary) becomes 2, 5 (101 binary) becomes -2

Parameters

Name	Type	Description
`value`	`Int32`	-

method base64VLQ_decode overload 2 #

base64VLQ_decode(String)

Decodes the next VLQValue from the provided chars.

Parameters

Name	Type	Description
`[in]`	`String`	-

method base64VLQ_decode #

base64VLQ_decode(CharEnumerator)

Decodes the next VLQValue from the provided chars.

field VLQ_BASE_SHIFT #

VLQ_BASE_SHIFT

A single base 64 digit can contain 6 bits of data. For the base 64 variable length quantities we use in the source map spec, the first bit Is the sign, the next four bits are the actual value, And the 6th bit Is the continuation bit. The continuation bit tells us whether there are more digits in this value following this digit.

   Continuation
   |    Sign
   |    |
   V    V
   101011

field VLQ_BASE #

VLQ_BASE

binary 100000

field VLQ_BASE_MASK #

VLQ_BASE_MASK

binary 011111

field VLQ_CONTINUATION_BIT #

VLQ_CONTINUATION_BIT

binary 100000

method base64VLQ_encode #

base64VLQ_encode(Int32)

method getIntegers #

getIntegers(String)