Implement argument handling, add string.h

string/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "string"
+version = "0.1.0"
+authors = ["Jeremy Soller <jackpot51@gmail.com>"]
+build = "build.rs"
+
+[build-dependencies]
+cbindgen = { path = "../cbindgen" }
+
+[dependencies]
+platform = { path = "../platform" }

string/build.rs

@@ -0,0 +1,11 @@
+extern crate cbindgen;
+
+use std::{env, fs};
+
+fn main() {
+    let crate_dir = env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR not set");
+    fs::create_dir_all("../target/include").expect("failed to create include directory");
+    cbindgen::generate(crate_dir)
+      .expect("failed to generate bindings")
+      .write_to_file("../target/include/string.h");
+}

string/cbindgen.toml

@@ -0,0 +1,6 @@
+sys_includes = ["stddef.h"]
+include_guard = "_STRING_H"
+language = "C"
+
+[enum]
+prefix_with_name = true

string/src/lib.rs

@@ -0,0 +1,28 @@
+//! string implementation for Redox, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/string.h.html
+
+#![no_std]
+
+extern crate platform;
+
+use platform::types::*;
+
+#[no_mangle]
+pub unsafe extern "C" fn strlen(s: *const c_char) -> size_t {
+    let mut size = 0;
+
+    loop {
+        if *s.offset(size) == 0 {
+            break;
+        }
+        size += 1;
+    }
+
+    size as size_t
+}
+
+/*
+#[no_mangle]
+pub extern "C" fn func(args) -> c_int {
+    unimplemented!();
+}
+*/