add preliminary windows support to std.io.COutStream

4 files changed, 20 insertions, 2 deletions

diff --git a/std/c.zig b/std/c.zig
index ecbc55890a..db28105eec 100644
--- a/std/c.zig
+++ b/std/c.zig
@@ -13,6 +13,8 @@ pub use switch (builtin.os) {
 // TODO https://github.com/ziglang/zig/issues/265 on this whole file
 
 pub const FILE = @OpaqueType();
+pub extern "c" fn fopen(filename: [*]const u8, modes: [*]const u8) ?*FILE;
+pub extern "c" fn fclose(stream: *FILE) c_int;
 pub extern "c" fn fwrite(ptr: [*]const u8, size_of_type: usize, item_count: usize, stream: *FILE) usize;
 pub extern "c" fn fread(ptr: [*]u8, size_of_type: usize, item_count: usize, stream: *FILE) usize;
 
diff --git a/std/io.zig b/std/io.zig
index 5ad35c91fb..48cec478e4 100644
--- a/std/io.zig
+++ b/std/io.zig
@@ -1092,6 +1092,7 @@ test "io.readLineSliceFrom" {
 pub const Packing = enum {
     /// Pack data to byte alignment
     Byte,
+
     /// Pack data to bit alignment
     Bit,
 };
@@ -1454,6 +1455,6 @@ pub fn Serializer(comptime endian: builtin.Endian, comptime packing: Packing, co
 
 test "import io tests" {
     comptime {
-        _ = @import("io_test.zig");
+        _ = @import("io/test.zig");
     }
 }
diff --git a/std/io/c_out_stream.zig b/std/io/c_out_stream.zig
index 398668979e..c66b342f1e 100644
--- a/std/io/c_out_stream.zig
+++ b/std/io/c_out_stream.zig
@@ -24,6 +24,10 @@ pub const COutStream = struct {
         const self = @fieldParentPtr(COutStream, "stream", out_stream);
         const amt_written = std.c.fwrite(bytes.ptr, 1, bytes.len, self.c_file);
         if (amt_written == bytes.len) return;
+        // TODO errno on windows. should we have a posix layer for windows?
+        if (builtin.os == .windows) {
+            return error.InputOutput;
+        }
         const errno = std.c._errno().*;
         switch (errno) {
             0 => unreachable,
diff --git a/std/io_test.zig b/std/io/test.zig
index d6f2264a56..07a3c0e8dd 100644
--- a/std/io_test.zig
+++ b/std/io/test.zig
@@ -1,4 +1,4 @@
-const std = @import("std.zig");
+const std = @import("../std.zig");
 const io = std.io;
 const meta = std.meta;
 const trait = std.trait;
@@ -589,3 +589,14 @@ test "Deserializer bad data" {
     try testBadData(.Big, .Bit);
     try testBadData(.Little, .Bit);
 }
+
+test "c out stream" {
+    if (!builtin.link_libc) return error.SkipZigTest;
+
+    const filename = c"tmp_io_test_file.txt";
+    const out_file = std.c.fopen(filename, c"w") orelse return error.UnableToOpenTestFile;
+    defer std.os.deleteFileC(filename) catch {};
+
+    const out_stream = &io.COutStream.init(out_file).stream;
+    try out_stream.print("hi: {}\n", i32(123));
+}