implement decode vector

[Mitarbeiter/Tim-Zeitz/stud-rust-base.git] / src / bin / decode_vector.rs

diff --git a/src/bin/decode_vector.rs b/src/bin/decode_vector.rs
new file mode 100644 (file)
index 0000000..180804b
--- /dev/null
+++ b/src/bin/decode_vector.rs
@@ -0,0 +1,71 @@
+extern crate stud_rust_base;
+use stud_rust_base::io::*;
+use std::env;
+
+fn main() {
+    let mut args = env::args();
+    args.next();
+
+    match &args.collect::<Vec<String>>()[..] {
+        [data_type, input] => {
+            match data_type.as_ref() {
+                "i8" => print_values(Vec::<i8>::load_from(input).expect("Failed to read from input")),
+                "u8" => print_values(Vec::<u8>::load_from(input).expect("Failed to read from input")),
+                "i16" => print_values(Vec::<i16>::load_from(input).expect("Failed to read from input")),
+                "u16" => print_values(Vec::<u16>::load_from(input).expect("Failed to read from input")),
+                "i32" => print_values(Vec::<i32>::load_from(input).expect("Failed to read from input")),
+                "u32" => print_values(Vec::<u32>::load_from(input).expect("Failed to read from input")),
+                "i64" => print_values(Vec::<i64>::load_from(input).expect("Failed to read from input")),
+                "u64" => print_values(Vec::<u64>::load_from(input).expect("Failed to read from input")),
+                "f32" => print_values(Vec::<f32>::load_from(input).expect("Failed to read from input")),
+                "f64" => print_values(Vec::<f64>::load_from(input).expect("Failed to read from input")),
+                "int8" => print_values(Vec::<i8>::load_from(input).expect("Failed to read from input")),
+                "uint8" => print_values(Vec::<u8>::load_from(input).expect("Failed to read from input")),
+                "int16" => print_values(Vec::<i16>::load_from(input).expect("Failed to read from input")),
+                "uint16" => print_values(Vec::<u16>::load_from(input).expect("Failed to read from input")),
+                "int32" => print_values(Vec::<i32>::load_from(input).expect("Failed to read from input")),
+                "uint32" => print_values(Vec::<u32>::load_from(input).expect("Failed to read from input")),
+                "int64" => print_values(Vec::<i64>::load_from(input).expect("Failed to read from input")),
+                "uint64" => print_values(Vec::<u64>::load_from(input).expect("Failed to read from input")),
+                "float32" => print_values(Vec::<f32>::load_from(input).expect("Failed to read from input")),
+                "float64" => print_values(Vec::<f64>::load_from(input).expect("Failed to read from input")),
+                _ => {
+                    print_usage();
+                    panic!("Unknown data_type {}", data_type);
+                }
+            };
+        },
+        _ => {
+            print_usage();
+            panic!("Invalid input")
+        },
+    }
+}
+
+fn print_usage() {
+    eprintln!("Usage: decode_vector data_type input_vector_file
+
+Reads binary data from input_vector_file and writes the data to the standard output. data_type can be one of
+* i8
+* u8
+* i16
+* u16
+* i32
+* u32
+* i64
+* u64
+* f32
+* f64
+
+");
+}
+
+use std::fmt::Display;
+
+fn print_values<T>(values: Vec<T>) where
+    T: Display
+{
+    for v in values {
+        println!("{}", v);
+    }
+}