genXMLSchemaCCode: Generate C code to read XML documents for a given schema

In duncantl/RCompileIdioms: Tools for creating code for compilation

Generate C code to read XML documents for a given schema

Description

This function takes an XML schema and generates C code to read a specific element/definition in that schema. It processes the sub-types and generates routines for those also. The routines are collected together as they are generated in a RoutineCollector object. We can generate shared routines for different schema element using the same collector and so collect all the routines in a single location.

Usage

genXMLSchemaCCode(desc, schema, ignore = c(), collector = genCollector())

Arguments

desc	the particular schema description object created via a call to readSchema
schema	the overall schema object from readSchema. This is used to find other types referenced by the schema object for which we are generating the code
collector	a manager collector object for managing the generated routines. These routines are generated for the referenced sub-types that also need generated routines for reading sub-XML nodes.

Value

The collector object which contains the generated routines.

Author(s)

Duncan Temple Lang

References

XML Schema http://www.w3.org/standards/xml/schema Definitive XML Schema, Priscilla Walmsley.

Examples

library(RCompileIdioms)

# Generate code
s = readSchema(system.file("XML", "Schema", "export-0.10.xsd", package = "RCompileIdioms"),
               followImports = FALSE)
g = genCollector()
k = genXMLSchemaCCode(s[[1]]$PageType, s, collector = g)

out = "wiki.c"
writeCode(g, out)

system("R CMD SHLIB wiki.c")

# Run time

dll = dyn.load(paste("wiki", .Platform$dynlib.ext, sep = ".")

library(XML)
doc = xmlParse(system.file("XML", "SAMPLE", package = "RCompileIdioms"))
pages = getNodeSet(doc, "//x:page", "x")

rpages = lapply(pages, function(p) .Call("R_PageType", p))

duncantl/RCompileIdioms documentation built on Nov. 23, 2023, 4:21 p.m.