Struct

Internal module that parses "struct type encodings" and turns them into proper node-ffi Struct instances.

isStruct()

This is a private function used internally by NodObjC. You should not need to use this function in your code.

Tests if the given arg is a Struct constructor or a string type encoding describing a struct (then true), otherwise false.

function isStruct (type) {
  return !!type.__isStructType__ || test.test(type)
}

getStruct()

This is a private function used internally by NodObjC. You should not need to use this function in your code.

Returns the struct constructor function for the given struct name or type.

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function getStruct (type) {
  // First check if a regular name was passed in
  var rtn = structs[type];
  if (rtn) return rtn;
  // If the struct type name has already been created, return that one
  var name = exports.parseStructName(type)
  //console.error('name: %s', name)
  rtn = structs[name];
  if (rtn) {
    //console.error('returning cached Struct')
    return rtn;
  }
  // Next parse the type structure
  var parsed = exports.parseStruct(type);
  // Otherwise we need to create a new Struct constructor
  var props = [];
  parsed.props.forEach(function (prop) {
    props.push([ types.map(prop[1]), prop[0] ])
  })
  return structs[parsed.name] = Struct(props)
}

parseStructName()

This is a private function used internally by NodObjC. You should not need to use this function in your code.

Extracts only the name of the given struct type encoding string.

function parseStructName (struct) {
  var s = struct.substring(1, struct.length-1)
    , equalIndex = s.indexOf('=')
  if (~equalIndex)
    s = s.substring(0, equalIndex)
  return s
}

parseStruct()

This is a private function used internally by NodObjC. You should not need to use this function in your code.

Parses a struct type string into an Object with a name String and a props Array (entries are a type string, or another parsed struct object)

function parseStruct (struct) {
  var s = struct.substring(1, struct.length-1)
    , equalIndex = s.indexOf('=')
    , rtn = {
        name: s.substring(0, equalIndex)
      , props: []
    }
  s = s.substring(equalIndex+1)
  var curProp = []
    , numBrackets = 0
    , entries = []
  for (var i=0; i < s.length; i++) {
    var cur = s[i]
    switch (cur) {
      case '"':
        if (numBrackets > 0)
          curProp.push(cur)
        else
          addProp()
        break;
      case '{':
      case '[':
      case '(':
        numBrackets++
        curProp.push(cur)
        break;
      case '}':
      case ']':
      case ')':
        numBrackets--
        curProp.push(cur)
        break;
      default:
        curProp.push(cur)
        break;
    }
  }
  addProp()
  function addProp () {
    entries.push(curProp.join(''))
    curProp = []
    numBrackets = 0
  }
  for (var i=1; i < entries.length; i+=2) {
    rtn.props.push([entries[i], entries[i+1]])
  }
  return rtn
}

NodObjC

The NodeJS ⇆ Objective-C Bridge

Struct

isStruct()

getStruct()

parseStructName()

parseStruct()