R: Write a Fragment of a C Program

Cfrag.list

R Documentation

Write a Fragment of a C Program

Description

Writes either the C declaration of items in a list, or initializes them with the contents of the list.

Usage

Cfrag.list(x, file = NULL,  item.num = c(3, 10, 5),
	indent = c("\t", "\t\t"), declaration.only = FALSE,
	long = FALSE, append = FALSE)

Arguments

`x`	required. A list with names.
`file`	either `NULL` or a character string. If `NULL` (or an empty string), then a vector of characters is returned.
`item.num`	length three vector giving the number of items per line for doubles, integers and characters.
`indent`	length two vector giving the amount to indent declarations and the items in the initialization.
`declaration.only`	logical flag. If `TRUE`, then the variables are declared but not given initial values.
`long`	logical flag. If `TRUE`, then integers are declared to be "long". If `FALSE`, then integers are declared to be "int".
`append`	logical flag. If `TRUE`, then the file is appended to; otherwise it is overwritten if it exists.

Value

if file is a non-empty character string, then the name of the file that is written. Otherwise, a character vector of the declarations – each element representing a different line.

Side Effects

if file is a non-empty character string, then the file is created, overwritten or appended.

Details

The type to declare is dependent on the storage mode of the component of x. You may need to coerce components to get them to be declared the correct type.

Note

Rcpp now probably makes most uses of this function obsolete.

Examples

test.list <- list(adoub=as.double(rnorm(20)), anint=as.integer(92:109),
	achar=c("aaa", "bbbb", "ccccc"))

Cfrag.list(test.list, file="")

## Not run: 
Cfrag.list(test.list, file="test.c")

Cfrag.list(test.list[1], file="test.c", dec=TRUE)
Cfrag.list(test.list[-1], file="test.c", dec=FALSE, append=TRUE)

## End(Not run)