typeinfo: S3 class for run-time type information of foreign C data...

In rdyncall: Improved Foreign Function Interface (FFI) and Dynamic Bindings to C Libraries (e.g. OpenGL)

Description

S3 class for run-time type information of foreign C data types.

Usage

TypeInfo(name, type = c("base","pointer","struct","union"), 
  size = NA, align = NA, basetype = NA, fields = NA, 
  signature = NA)
getTypeInfo(name, envir = parent.frame())

Arguments

name	character string specifying the type name.
type	character string specifying the type.
size	integer, size of type in bytes.
align	integer, alignment of type in bytes.
basetype	character string, base type of 'pointer' types.
signature	character string specifying the struct/union type signature.
envir	the environment to look for type object.
fields	data frame with type and offset information that specifies aggregate struct and union types.

Details

Type information objects are created at run-time to describe the concrete layout of foreign C data types on the host machine. While type signatures give an abstract information on e.g. the field types and names of aggregate structure types, these objects store concrete memory size, alignment and layout information about C data types.

Value

List object tagged as S3 class 'TypeInfo' with the following named entries

type	Type name.
size	Size in bytes.
align	Alignment in bytes.
fields	Data frame for field information with the following columns: type type name offset byte offset (starts counted from 0)

See Also

parseStructInfos for details on the framework for handling foreign C data types.

rdyncall documentation built on May 2, 2019, 6:15 p.m.