stdlib additions

Cargo.lock

@@ -22,7 +22,7 @@ checksum = "b03f7fbd470aa8b3ad163c85cce8bccfc11cc9c44ef12da0a4eddd98bd307352"
 
 [[package]]
 name = "spl"
-version = "0.2.1"
+version = "0.2.2"
 dependencies = [
  "multicall",
  "once_cell",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "spl"
-version = "0.2.2"
+version = "0.2.3"
 edition = "2021"
 description = "Stack Pogramming Language: A simple, concise scripting language."
 license = "MIT"

src/std_fns.rs

@@ -103,6 +103,9 @@ pub fn array_new(stack: &mut Stack) -> OError {
     let Value::Mega(i) = stack.pop().lock_ro().native.clone() else {
         return stack.err(ErrorKind::InvalidCall("anew".to_owned()));
     };
+    if i < 0 {
+        return stack.err(ErrorKind::InvalidCall("anew".to_owned()));
+    }
     stack.push(Value::Array(vec![Value::Null.spl(); i as usize]).spl());
     Ok(())
 }

src/stream.rs

@@ -1,10 +1,10 @@
 use std::{
     collections::HashMap,
     fs::OpenOptions,
-    io::Read,
-    io::Write,
+    io::{Read, Write},
     mem,
     net::{Shutdown, TcpStream, UdpSocket},
+    process::{self, Stdio},
     sync::Arc,
 };
 
@@ -326,11 +326,38 @@ fn stream_udp(stack: &mut Stack) -> Result<Stream, Error> {
     Ok(Stream::new(UdpRW(sock), close_udp))
 }
 
+fn stream_cmd(stack: &mut Stack) -> Result<Stream, Error> {
+    require_on_stack!(a, Array, stack, "CMD new-stream");
+    fn close_cmd(_stream: &mut Stream) {}
+    let mut args = Vec::new();
+    for item in a.iter() {
+        if let Value::Str(ref s) = item.lock_ro().native {
+            args.push(s.to_owned());
+        }
+    }
+    if args.is_empty() {
+        return stack.err(ErrorKind::InvalidCall("command".to_owned()));
+    }
+    let mut command = process::Command::new(&args[0])
+        .args(&args[1..])
+        .stdin(Stdio::piped())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::null())
+        .spawn()
+        .map_err(|x| stack.error(ErrorKind::IO(x.to_string())))?;
+    Ok(Stream::new_split(
+        command.stdout.take().unwrap(),
+        command.stdin.take().unwrap(),
+        close_cmd,
+    ))
+}
+
 pub fn register(r: &mut Stack, o: Arc<Frame>) {
     if !*IS_INITIALIZED.lock_ro() {
         register_stream_type("file", stream_file);
         register_stream_type("tcp", stream_tcp);
         register_stream_type("udp", stream_udp);
+        register_stream_type("cmd", stream_cmd);
         *IS_INITIALIZED.lock() = true;
     }
 

std.spl

@@ -79,6 +79,9 @@ construct _str_ext {
             }
         } ] _str
     }
+    starts-with { bool | with beginning this ;
+        beginning:to-bytes this:to-bytes:starts-with
+    }
 } include _str_ext in str
 
 construct _mega-ext {
@@ -124,6 +127,19 @@ construct _array-ext {
     sub { [any] | with begin end this ;
         this (end begin - anew) begin 0 (end begin -) acopy
     }
+    starts-with { bool | with beginning this ;
+        this:len beginning:len lt if {
+            0
+            2 stop
+        }
+        0 beginning:len this:sub beginning eq
+    }
+    last { | with this ;
+        this:len -- this:get
+    }
+    =last { | with this ;
+        this:len -- this:set
+    }
     0 { any | with this ;
         0 this:get
     }
@@ -403,6 +419,7 @@ func cache { ... | with arg-amt id body ;
     result
 }
 
+def do-not-dump 0 =do-not-dump
 func handle-panic { | with msg trace ;
     program-name dup if {
         program-name print " panicked at:" println
@@ -418,6 +435,10 @@ func handle-panic { | with msg trace ;
         null =map
         dyn-__dump
     } not if {
+        do-not-dump if {
+            "Not dumping." println
+            2 stop
+        }
         "SPL_PLAIN_PANIC" map:get dup if {
             "Not dumping because SPL_PLAIN_PANIC is set." println
         } not if {

stream.spl

@@ -78,13 +78,14 @@ construct _StreamType {
 }
 
 func register-stream-type { | with id ;
-    [ stream-types:to-stack id ] =stream-types
+    stream-types [ id ] aadd =stream-types
     id _StreamType dyn-def-field
 }
 
 "tcp" register-stream-type
 "udp" register-stream-type
 "file" register-stream-type
+"cmd" register-stream-type
 
 func StreamTypes { _StreamType |
     _StreamType:new