Read settings in a bit

src/Tools/cpp_out/src/lib.rs

@@ -1,13 +1,44 @@
 use tool_helper::{Input, Output, Result};
 pub use tool_helper::Error;
 
-fn write_cpp(_input: Input, output: &mut Output, line_feed: &str) -> Result<()> {
-    Error::try_with(write!(output, "const char data[] = {{{}", line_feed))?;
-    Error::try_with(write!(output, "}};"))?;
+pub enum LineFeed {
+    Unix,
+    Windows
+}
+
+pub enum FileType {
+    CHeader,
+    CSource,
+    CPPHeader,
+    CPPSource,
+}
+
+pub struct Configuration {
+    pub file_name:     String,
+    pub data_name:     String,
+    pub line_feed:     LineFeed,
+    pub file_type:     FileType,
+}
+
+struct FileVariables<'a> {
+    include:  &'a str,
+    var_type: &'a str,
+}
+
+const UNIX_LINEFEED:    &'static str = "\n";
+const WINDOWS_LINEFEED: &'static str = "\r\n";
+
+const   C_VARIABLES: FileVariables = FileVariables{include: "", var_type: "char"};
+const CPP_VARIABLES: FileVariables = FileVariables{include: "#include <stdint.h>", var_type: "uint8_t"};
+
+fn write_source_file(variables: &FileVariables, input: Input, output: &mut Output, line_feed: &str) -> Result<()> {
+    Error::try_or_new(write!(output, "{}{}{}", variables.include, line_feed, line_feed), None)?;
+    Error::try_or_new(write!(output, "const {} data[] = {{{}", variables.var_type, line_feed), None)?;
+    Error::try_or_new(write!(output, "}};"), None)?;
     
     Ok(())
 }
 
-pub fn convert(_input: Input, mut output: Output) -> Result<()> {
-    write_cpp(_input, &mut output, "\r\n")
+pub fn convert(_cfg: Configuration, _input: Input, mut output: Output) -> Result<()> {
+    write_source_file(&CPP_VARIABLES, _input, &mut output, WINDOWS_LINEFEED)
 }

src/Tools/cpp_out/src/main.rs

@@ -1,5 +1,6 @@
 use clap::{Parser};
 use std::path::PathBuf;
+use cpp_out::{Configuration, Error, FileType};
 
 #[derive(Parser)]
 #[clap(about = "Output a file content or stdin to a c++ header/source file", long_about = None)]
@@ -11,15 +12,32 @@ struct CommandLine {
     output_file: PathBuf,
 }
 
+fn configurate(cmd: &CommandLine) -> tool_helper::Result<Configuration> {
+    let file_name = tool_helper::get_file_name_from_path_buf(&cmd.output_file, "output")?;
+    let extension = tool_helper::os_str_to_string(Error::ok_or_new(cmd.output_file.extension(), "File extension required for output".to_owned(), None)?, "extension")?.to_ascii_lowercase();
+    let file_type = Error::ok_or_new({
+        match extension.as_ref() {
+            "h"   => Some(FileType::CHeader),
+            "hpp" => Some(FileType::CPPHeader),
+            "c"   => Some(FileType::CSource),
+            "cpp" => Some(FileType::CPPSource),
+            _     => None
+        }
+    }, format!("{} unkown file extension", extension), None)?;
+
+    Ok(Configuration{file_name, data_name: "Planschbecken".to_owned(), line_feed: cpp_out::LineFeed::Windows, file_type})
+}
+
 fn run_main() -> tool_helper::Result<()> {
     match CommandLine::try_parse() {
         Ok(cmd) => {
+            let cfg    = configurate(&cmd)?;
             let input  = tool_helper::open_input(cmd.input_file)?;
             let output = tool_helper::open_output(Some(cmd.output_file))?;
 
-            return cpp_out::convert(input, output);
+            return cpp_out::convert(cfg, input, output);
         },
-        Err(error) => Err(tool_helper::Error::new(-1, error.to_string()))
+        Err(error) => Err(tool_helper::Error::new(error.to_string(), None))
     }    
 }
 

src/Tools/tool_helper/src/lib.rs

@@ -10,19 +10,19 @@ pub struct Error {
 }
 
 impl Error {
-    pub fn new(exit_code: i32, text: String) -> Error {
-        Error{exit_code, text}
+    pub fn new(text: String, exit_code: Option<i32>) -> Error {
+        Error{exit_code: Self::get_exit_code(exit_code), text}
     }
 
-    pub fn try_with_code<T, S>(result: std::result::Result<T, S>, exit_code: Option<i32>) -> Result<T> where S: std::fmt::Display {
+    pub fn try_or_new<T, S>(result: std::result::Result<T, S>, exit_code: Option<i32>) -> Result<T> where S: std::fmt::Display {
         match result {
             Ok(value)  => Ok(value),
-            Err(error) => Err(Error::new(Self::get_exit_code(exit_code), error.to_string())),
+            Err(error) => Err(Error::new(error.to_string(), exit_code)),
         }
     }
 
-    pub fn try_with<T, S>(result: std::result::Result<T, S>) -> Result<T> where S: std::fmt::Display {
-        Self::try_with_code(result, None)
+    pub fn ok_or_new<T>(option: Option<T>, error_text: String, code: Option<i32>) -> Result<T> {
+        Ok(option.ok_or(Error::new(error_text, code))?)
     }
 
     fn get_exit_code(exit_code: Option<i32>) -> i32 {
@@ -35,14 +35,22 @@ impl Error {
 
 pub fn open_output(output_file: Option<PathBuf>) -> Result<Output> {
     match output_file {
-        Some(output_path) => Ok(Box::new(Error::try_with(std::fs::File::create(output_path))?)),
+        Some(output_path) => Ok(Box::new(Error::try_or_new(std::fs::File::create(output_path), None)?)),
         None              => Ok(Box::new(std::io::stdout())),
     }
 }
 
 pub fn open_input(input_file: Option<PathBuf>) -> Result<Input> {
     match input_file {
-        Some(input_path) => Ok(Box::new(Error::try_with(std::fs::File::open(input_path))?)),
+        Some(input_path) => Ok(Box::new(Error::try_or_new(std::fs::File::open(input_path), None)?)),
         None             => Ok(Box::new(std::io::stdin())),
     }
+}
+
+pub fn os_str_to_string(input: &std::ffi::OsStr, name: &str) -> Result<String> {
+    Ok(Error::ok_or_new(input.to_str(), format!("Converting {} to UTF-8 failed", name), None)?.to_owned())
+}
+
+pub fn get_file_name_from_path_buf(input: &PathBuf, name: &str) -> Result<String> {
+    os_str_to_string(Error::ok_or_new(input.file_name(), format!("No {} file name found", name), None)?, name)
 }