use std::fs;
use std::fs::File;
use std::io::{Read, Write};
use std::path;
use bindgen::config::{Config, Language};
use bindgen::ir::{Constant, Function, ItemContainer, Static};
use bindgen::writer::{Source, SourceWriter};
pub struct Bindings {
config: Config,
globals: Vec<Static>,
constants: Vec<Constant>,
items: Vec<ItemContainer>,
functions: Vec<Function>,
}
impl Bindings {
pub(crate) fn new(
config: Config,
constants: Vec<Constant>,
globals: Vec<Static>,
items: Vec<ItemContainer>,
functions: Vec<Function>,
) -> Bindings {
Bindings {
config: config,
globals: globals,
constants: constants,
items: items,
functions: functions,
}
}
pub fn write_to_file<P: AsRef<path::Path>>(&self, path: P) -> bool {
if !path.as_ref().is_file() {
if let Some(parent) = path::Path::new(path.as_ref()).parent() {
fs::create_dir_all(parent).unwrap();
}
self.write(File::create(path).unwrap());
return true;
}
let mut new_file_contents = Vec::new();
self.write(&mut new_file_contents);
let mut old_file_contents = Vec::new();
{
let mut old_file = File::open(&path).unwrap();
old_file.read_to_end(&mut old_file_contents).unwrap();
}
if old_file_contents != new_file_contents {
let mut new_file = File::create(&path).unwrap();
new_file.write_all(&new_file_contents).unwrap();
true
} else {
false
}
}
pub fn write_headers<F: Write>(&self, out: &mut SourceWriter<F>) {
if let Some(ref f) = self.config.header {
out.new_line_if_not_start();
write!(out, "{}", f);
out.new_line();
}
if let Some(ref f) = self.config.include_guard {
out.new_line_if_not_start();
write!(out, "#ifndef {}", f);
out.new_line();
write!(out, "#define {}", f);
out.new_line();
}
if self.config.include_version {
out.new_line_if_not_start();
write!(
out,
"/* Generated with cbindgen:{} */",
::bindgen::config::VERSION
);
out.new_line();
}
if let Some(ref f) = self.config.autogen_warning {
out.new_line_if_not_start();
write!(out, "{}", f);
out.new_line();
}
out.new_line_if_not_start();
if self.config.language == Language::C {
out.write("#include <stdarg.h>");
out.new_line();
out.write("#include <stdbool.h>");
out.new_line();
out.write("#include <stdint.h>");
out.new_line();
out.write("#include <stdlib.h>");
out.new_line();
} else {
out.write("#include <cstdarg>");
out.new_line();
out.write("#include <cstdint>");
out.new_line();
out.write("#include <cstdlib>");
out.new_line();
}
for include in &self.config.sys_includes {
write!(out, "#include <{}>", include);
out.new_line();
}
for include in &self.config.includes {
write!(out, "#include \"{}\"", include);
out.new_line();
}
}
pub fn write<F: Write>(&self, file: F) {
let mut out = SourceWriter::new(file, &self.config);
if !self.config.no_includes {
self.write_headers(&mut out);
}
if self.config.language == Language::Cxx {
self.open_namespaces(&mut out);
}
for constant in &self.constants {
if constant.ty.is_primitive_or_ptr_primitive() {
out.new_line_if_not_start();
constant.write(&self.config, &mut out);
out.new_line();
}
}
for item in &self.items {
if item
.deref()
.annotations()
.bool("no-export")
.unwrap_or(false)
{
continue;
}
out.new_line_if_not_start();
match item {
&ItemContainer::Constant(..) => unreachable!(),
&ItemContainer::Static(..) => unreachable!(),
&ItemContainer::Enum(ref x) => x.write(&self.config, &mut out),
&ItemContainer::Struct(ref x) => x.write(&self.config, &mut out),
&ItemContainer::Union(ref x) => x.write(&self.config, &mut out),
&ItemContainer::OpaqueItem(ref x) => x.write(&self.config, &mut out),
&ItemContainer::Typedef(ref x) => x.write(&self.config, &mut out),
}
out.new_line();
}
for constant in &self.constants {
if !constant.ty.is_primitive_or_ptr_primitive() {
out.new_line_if_not_start();
constant.write(&self.config, &mut out);
out.new_line();
}
}
if !self.functions.is_empty() || !self.globals.is_empty() {
if self.config.language == Language::Cxx {
out.new_line_if_not_start();
out.write("extern \"C\" {");
out.new_line();
}
for global in &self.globals {
out.new_line_if_not_start();
global.write(&self.config, &mut out);
out.new_line();
}
for function in &self.functions {
out.new_line_if_not_start();
function.write(&self.config, &mut out);
out.new_line();
}
if self.config.language == Language::Cxx {
out.new_line_if_not_start();
out.write("} // extern \"C\"");
out.new_line();
}
}
if self.config.language == Language::Cxx {
self.close_namespaces(&mut out);
}
if let Some(ref f) = self.config.include_guard {
out.new_line_if_not_start();
if self.config.language == Language::C {
write!(out, "#endif /* {} */", f);
} else {
write!(out, "#endif // {}", f);
}
out.new_line();
}
if let Some(ref f) = self.config.trailer {
out.new_line_if_not_start();
write!(out, "{}", f);
out.new_line();
}
}
pub(crate) fn open_namespaces<F: Write>(&self, out: &mut SourceWriter<F>) {
let mut wrote_namespace: bool = false;
if let Some(ref namespace) = self.config.namespace {
wrote_namespace = true;
out.new_line();
write!(out, "namespace {} {{", namespace);
}
if let Some(ref namespaces) = self.config.namespaces {
wrote_namespace = true;
for namespace in namespaces {
out.new_line();
write!(out, "namespace {} {{", namespace);
}
}
if wrote_namespace {
out.new_line();
}
}
pub(crate) fn close_namespaces<F: Write>(&self, out: &mut SourceWriter<F>) {
let mut wrote_namespace: bool = false;
if let Some(ref namespaces) = self.config.namespaces {
wrote_namespace = true;
for namespace in namespaces.iter().rev() {
out.new_line_if_not_start();
write!(out, "}} // namespace {}", namespace);
}
}
if let Some(ref namespace) = self.config.namespace {
wrote_namespace = true;
out.new_line_if_not_start();
write!(out, "}} // namespace {}", namespace);
}
if wrote_namespace {
out.new_line();
}
}
}