From 3e53d3ae08d41b21d9edcd0f9bbd9e0edbdfb138 Mon Sep 17 00:00:00 2001
From: Matthias Andreas Benkard <code@mail.matthias.benkard.de>
Date: Sat, 16 Aug 2025 13:02:47 +0200
Subject: Unify input handling.

---
 src/cmd/lib/types.zig | 59 ++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 56 insertions(+), 3 deletions(-)

(limited to 'src/cmd/lib')

diff --git a/src/cmd/lib/types.zig b/src/cmd/lib/types.zig
index f663a64..f6a32c0 100644
--- a/src/cmd/lib/types.zig
+++ b/src/cmd/lib/types.zig
@@ -72,6 +72,59 @@ pub const InputSource = struct {
     }
 };
 
+pub const StdinInputReader = struct {
+    pub fn readLine(self: *StdinInputReader, allocator: Allocator) !?[]const u8 {
+        _ = self;
+        const stdin = std.io.getStdIn().reader();
+
+        // Read line from stdin with proper DOS handling
+        const line = stdin.readUntilDelimiterOrEofAlloc(allocator, '\n', 4096) catch |err| switch (err) {
+            error.StreamTooLong => {
+                // Line too long, skip to next line
+                while (true) {
+                    const ch = stdin.readByte() catch return null;
+                    if (ch == '\n') break;
+                }
+                return try allocator.dupe(u8, "");
+            },
+            else => return null,
+        };
+
+        if (line) |input| {
+            // Check for Ctrl+Z (EOF marker) - ASCII 26 or ^Z text
+            if ((input.len == 1 and input[0] == 26) or
+                (input.len == 2 and input[0] == '^' and input[1] == 'Z'))
+            {
+                allocator.free(input);
+                return null; // EOF
+            }
+
+            // Remove trailing \r if present (DOS line endings)
+            if (input.len > 0 and input[input.len - 1] == '\r') {
+                const trimmed = try allocator.dupe(u8, input[0 .. input.len - 1]);
+                allocator.free(input);
+                return trimmed;
+            } else {
+                return input;
+            }
+        } else {
+            return null; // EOF
+        }
+    }
+};
+
+pub const InputReader = union(enum) {
+    source: *InputSource,
+    stdin: *StdinInputReader,
+
+    pub fn readLine(self: *InputReader, allocator: Allocator) !?[]const u8 {
+        switch (self.*) {
+            .source => |source| return source.readLine(allocator),
+            .stdin => |stdin| return stdin.readLine(allocator),
+        }
+    }
+};
+
 pub const OutputWriter = union(enum) {
     capture: *OutputCapture,
     stdout: *StdoutOutputCapture,
@@ -89,14 +142,14 @@ pub const ExecuteCommandFn = *const fn (Command, Allocator, ?*OutputCapture, ?*I
 pub const CommandContext = struct {
     allocator: Allocator,
     output_writer: OutputWriter,
-    input_source: ?*InputSource,
+    input_reader: InputReader,
     execute_command: ExecuteCommandFn,
 
-    pub fn init(allocator: Allocator, output_writer: OutputWriter, input_source: ?*InputSource, execute_command: ExecuteCommandFn) CommandContext {
+    pub fn init(allocator: Allocator, output_writer: OutputWriter, input_reader: InputReader, execute_command: ExecuteCommandFn) CommandContext {
         return CommandContext{
             .allocator = allocator,
             .output_writer = output_writer,
-            .input_source = input_source,
+            .input_reader = input_reader,
             .execute_command = execute_command,
         };
     }
-- 
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