# HG changeset patch
# User Vojtěch Král <vojtech@kral.hk>
# Date 1475331560 -7200
# Node ID 2d2eaba76d70f74fb9d0c30b936011f687f927cf
# Parent  bfef9f34e438642fd780fea2c47ac13384479523
implementation in the Rust language
discussion and source: https://www.abclinuxu.cz/blog/xkucf03/2016/9/parametry-prikazu-roury-java-a-jine-jazyky#12
Committed by: František Kučera <franta-hg@frantovo.cz>

diff -r bfef9f34e438 -r 2d2eaba76d70 .hgignore
--- a/.hgignore	Sun Sep 11 19:52:26 2016 +0200
+++ b/.hgignore	Sat Oct 01 16:19:20 2016 +0200
@@ -12,3 +12,5 @@
 ^java/[^/]+/dist/
 ^java/[^/]+/build/
 ^java/[^/]+/nbproject/private/
+
+^rust/parameter-lister/target/
\ No newline at end of file
diff -r bfef9f34e438 -r 2d2eaba76d70 rust/parameter-lister/Cargo.lock
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/parameter-lister/Cargo.lock	Sat Oct 01 16:19:20 2016 +0200
@@ -0,0 +1,4 @@
+[root]
+name = "parameter-lister-rust"
+version = "0.1.0"
+
diff -r bfef9f34e438 -r 2d2eaba76d70 rust/parameter-lister/Cargo.toml
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/parameter-lister/Cargo.toml	Sat Oct 01 16:19:20 2016 +0200
@@ -0,0 +1,6 @@
+[package]
+name = "parameter-lister-rust"
+version = "0.1.0"
+authors = ["Vojtech Kral <vojtech@kral.hk>"]
+
+[dependencies]
diff -r bfef9f34e438 -r 2d2eaba76d70 rust/parameter-lister/src/main.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/parameter-lister/src/main.rs	Sat Oct 01 16:19:20 2016 +0200
@@ -0,0 +1,45 @@
+/**
+ * parameter-lister (Rust implementation)
+ * Copyright © 2016 Vojtěch Král <vojtech@kral.hk>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+use std::collections::HashMap;
+use std::env;
+use std::io;
+
+mod outputmodule;
+mod terminalmodule;
+mod xmlmodule;
+
+use outputmodule::OutputModule;
+use terminalmodule::TerminalModule;
+use xmlmodule::XMLModule;
+
+static ENV_OUTPUT_MODULE_NAME: &'static str = "PARAMETER_LISTER_OUTPUT";
+
+
+fn main() {
+	let mut modules: HashMap<_, Box<OutputModule>> = HashMap::new();
+	modules.insert(terminalmodule::MOD_NAME, Box::new(TerminalModule::new()));
+	modules.insert(xmlmodule::MOD_NAME, Box::new(XMLModule::new()));
+
+	let module_name = env::var(ENV_OUTPUT_MODULE_NAME).unwrap_or(String::from("terminal"));
+	let module = modules.get(&*module_name).expect(&*format!("No such module: {}", module_name));
+
+	match module.process(&mut io::stdout(), env::args().collect()) {
+		Ok(()) => {},
+		Err(msg) => panic!("Error while processing output with module {}: {}", module_name, msg),
+	}
+}
diff -r bfef9f34e438 -r 2d2eaba76d70 rust/parameter-lister/src/outputmodule.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/parameter-lister/src/outputmodule.rs	Sat Oct 01 16:19:20 2016 +0200
@@ -0,0 +1,22 @@
+/**
+ * parameter-lister (Rust implementation)
+ * Copyright © 2016 Vojtěch Král <vojtech@kral.hk>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+pub use std::io::Write;
+
+pub trait OutputModule {
+	fn process(&self, output: &mut Write, parameters: Vec<String>) -> Result<(), String>;
+}
diff -r bfef9f34e438 -r 2d2eaba76d70 rust/parameter-lister/src/terminalmodule.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/parameter-lister/src/terminalmodule.rs	Sat Oct 01 16:19:20 2016 +0200
@@ -0,0 +1,38 @@
+/**
+ * parameter-lister (Rust implementation)
+ * Copyright © 2016 Vojtěch Král <vojtech@kral.hk>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+use outputmodule::*;
+
+pub static MOD_NAME: &'static str = "terminal";
+
+
+pub struct TerminalModule;
+
+impl TerminalModule {
+	pub fn new() -> TerminalModule { TerminalModule }
+}
+
+impl OutputModule for TerminalModule {
+	fn process(&self, output: &mut Write, parameters: Vec<String>) -> Result<(), String> {
+		for p in parameters {
+			if let Err(err) = write!(output, "{}\n", p) {
+				return Err(format!("{}", err));
+			}
+		}
+		Ok(())
+	}
+}
diff -r bfef9f34e438 -r 2d2eaba76d70 rust/parameter-lister/src/xmlmodule.rs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/parameter-lister/src/xmlmodule.rs	Sat Oct 01 16:19:20 2016 +0200
@@ -0,0 +1,58 @@
+/**
+ * parameter-lister (Rust implementation)
+ * Copyright © 2016 Vojtěch Král <vojtech@kral.hk>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+use std::io;
+
+use outputmodule::*;
+
+pub static MOD_NAME: &'static str = "xml";
+
+
+trait XMLEscape {
+	fn xml_escape(self) -> Self;
+}
+
+impl XMLEscape for String {
+	fn xml_escape(self) -> String {
+		self.replace("&", "&amp;").replace("<", "&lt;").replace(">", "&gt;")
+	}
+}
+
+
+pub struct XMLModule;
+
+impl XMLModule {
+	pub fn new() -> XMLModule { XMLModule }
+
+	fn process_io(&self, output: &mut Write, parameters: Vec<String>) -> io::Result<()> {
+		try!(write!(output, "<parameters>\n"));
+		for p in parameters {
+			try!(write!(output, "\t<parameter>{}</parameter>\n", p.xml_escape()));
+		}
+		try!(write!(output, "</parameters>\n"));
+		Ok(())
+	}
+}
+
+impl OutputModule for XMLModule {
+	fn process(&self, output: &mut Write, parameters: Vec<String>) -> Result<(), String> {
+		match self.process_io(output, parameters) {
+			Ok(()) => Ok(()),
+			Err(err) => Err(format!("{}", err)),
+		}
+	}
+}
diff -r bfef9f34e438 -r 2d2eaba76d70 rust/parameter-lister/start.sh
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rust/parameter-lister/start.sh	Sat Oct 01 16:19:20 2016 +0200
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+# syntax highlight:
+# ./start.sh | pygmentize -l xml
+
+p1="aaa";
+p2="first line
+second line
+third line";
+p3="a & b >> OMG <<";
+
+export PARAMETER_LISTER_OUTPUT="xml";
+
+target/debug/parameter-lister-rust "$p1" "$p2" "$p3";
+#cargo run -q "$p1" "$p2" "$p3";