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head
meta(charset="utf-8")
title "ref" documentation v#{package.version}
meta(name="description", content=package.description)
meta(name="keywords", content=['node.js', package.name].concat(package.keywords).join(', '))
meta(name="author", content="Nathan Rajlich")
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body
.container
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h1 #{package.name}
span.pointer *
span.version v#{package.version}
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h3= package.description
.columns.sixteen.intro
h4 What is <code>ref</code>?
p
code ref
| is a native addon for
a(href="http://nodejs.org") Node.js
| that aids in doing C programming in JavaScript, by extending
| the built-in
a(href="http://nodejs.org/api/buffer.html")
code Buffer
| class
| with some fancy additions like:
ul
li Getting the memory address of a Buffer
li Checking the endianness of the processor
li Checking if a Buffer represents the NULL pointer
li Reading and writing "pointers" with Buffers
li Reading and writing C Strings (NULL-terminated)
li Reading and writing JavaScript Object references
li Reading and writing
strong int64_t
| and
strong uint64_t
| values
li A "type" convention to define the contents of a Buffer
p
| There is indeed a lot of
em meat
| to
code ref
| , but it all fits together in one way or another in the end.
br
| For simplicity,
code ref
| 's API can be broken down into 3 sections:
a.nav.columns.five(href='#exports')
h4 ref <code>exports</code>
p
| All the static versions of
code ref
| 's functions and default "types" available on the exports returned from
code require('ref')
| .
a.nav.columns.five(href='#types')
h4 <em>"type"</em> system
p
| The
em "type"
| system allows you to define a "type" on any Buffer instance, and then
| use generic
code ref()
| and
code deref()
| functions to reference and dereference values.
a.nav.columns.five(href='#extensions')
h4 <code>Buffer</code> extensions
p
code Buffer.prototype
| gets extended with some convenience functions. These all just mirror
| their static counterpart, using the Buffer's
code this
| variable as the
code buffer
| variable.
hr
.columns.eight.section.exports
a(name="exports")
a(href="#exports")
h2 ref exports
.columns.sixteen.intro
p
| This section documents all the functions exported from
code require('ref')
| .
each doc in exports
if (!doc.ignore)
.columns.sixteen.section
a(name='exports-' + doc.name)
a(href='#exports-' + doc.name)
isFunc = doc.type == 'method' || doc.isPrivate
h3
| ref.#{doc.name}
if (isFunc)
| (
each param, i in doc.paramTypes
span.param #{param.types.join('|')} #{param.name}
if (i + 1 < doc.paramTypes.length)
| ,
| )
if (doc.returnType)
|
span.rtn &rarr; #{doc.returnType.types.join('|')}
if (!isFunc)
|
span.rtn &rArr; #{doc.type}
if (doc.paramTypes.length > 0 || doc.returnType)
ul
each param in doc.paramTypes
li #{param.name} - !{param.description}
if (doc.returnType)
li
strong Return:
| !{doc.returnType.description}
!= (doc && doc.description.full || '').replace(/\<br ?\/?\>/g, ' ')
hr
.columns.eight.section.types
a(name="types")
a(href="#types")
h2
em "type"
| system
.columns.sixteen.intro.types
p
| A "type" in
code ref
| is simply an plain 'ol JavaScript Object, with a set
| of expected properties attached that implement the logic for getting
| &amp; setting values on a given
code Buffer
| instance.
p
| To attach a "type" to a Buffer instance, you simply attach the "type"
| object to the Buffer's <code>type</code> property.
code ref
| comes with a set of commonly used types which are described in this
| section.
h4 Creating your own "type"
p
| It's trivial to create your own "type" that reads and writes your
| own custom datatype/class to and from Buffer instances using
code ref
| 's unified API.
br
| To create your own "type", simply create a JavaScript Object with
| the following properties defined:
table
tr
th Name
th Data Type
th Description
tr
td: code size
td: code Number
td The size in bytes required to hold this datatype.
tr
td: code indirection
td: code Number
td
| The current level of indirection of the buffer. When defining
| your own "types", just set this value to <code>1</code>.
tr
td: code get
td: code Function
td
| The function to invoke when
a(href="#exports-get")
code ref.get()
| is invoked on a buffer of this type.
tr
td: code set
td: code Function
td
| The function to invoke when
a(href="#exports-set")
code ref.set()
| is invoked on a buffer of this type.
tr
td: code name
td: code String
td
em (Optional)
| The name to use during debugging for this datatype.
tr
td: code alignment
td: code Number
td
em (Optional)
| The alignment of this datatype when placed inside a struct.
| Defaults to the type's
code size
| .
h4 The built-in "types"
p
| Here is the list of
code ref
| 's built-in "type" Objects. All these built-in "types" can be found
| on the
code ref.types
| export Object. All the built-in types use "native endianness" when
| multi-byte datatypes are involved.
each doc in types
if (!doc.ignore)
.columns.sixteen.section
a(name='types-' + doc.name)
a(href='#types-' + doc.name)
h3 types.#{doc.name}
!= doc.description.full.replace(/\<br ?\/?\>/g, ' ')
hr
.columns.eight.section.exports
a(name="extensions")
a(href="#extensions")
h2 Buffer extensions
.columns.sixteen.intro
p
code Buffer.prototype
| gets extended with some convenience functions that you can use in
| your modules and/or applications.
each doc in extensions
if (!doc.ignore)
.columns.sixteen.section
a(name='extensions-' + doc.name)
a(href='#extensions-' + doc.name)
h3 Buffer##{doc.name}()
if (doc.name === 'inspect')
!= doc.description.full.replace(/\<br ?\/?\>/g, ' ')
else
p
| Shorthand for
a(href='#exports-' + doc.name)
code ref.#{doc.name}(this, …)
| .
!= (doc.ref && doc.ref.description.full || '').replace(/\<br ?\/?\>/g, ' ')
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