wasm: export terminal core API

src/main_wasm.zig

@@ -6,6 +6,7 @@ const builtin = @import("builtin");
 pub usingnamespace @import("os/wasm.zig");
 pub usingnamespace @import("os/wasm/log.zig");
 pub usingnamespace @import("font/main.zig");
+pub usingnamespace @import("terminal/main.zig");
 
 // Set our log level. We try to get as much logging as possible but in
 // ReleaseSmall mode where we're optimizing for space, we elevate the

src/terminal/main.zig

@@ -28,6 +28,11 @@ pub const EraseLine = csi.EraseLine;
 pub const TabClear = csi.TabClear;
 pub const Attribute = sgr.Attribute;
 
+/// If we're targeting wasm then we export some wasm APIs.
+pub usingnamespace if (builtin.target.isWasm()) struct {
+    pub usingnamespace @import("wasm.zig");
+} else struct {};
+
 test {
     @import("std").testing.refAllDecls(@This());
 }

src/terminal/main_wasm.zig

@@ -1,4 +0,0 @@
-// This is the main file for the WASM module. The WASM module just
-// imports the C API.
-
-pub usingnamespace @import("c_api.zig");

src/terminal/wasm.zig

@@ -8,12 +8,8 @@ const std = @import("std");
 const builtin = @import("builtin");
 const Allocator = std.mem.Allocator;
 const Terminal = @import("main.zig").Terminal;
-
-// The allocator that we want to use.
-const alloc = if (builtin.link_libc)
-    std.heap.c_allocator
-else
-    std.heap.page_allocator;
+const wasm = @import("../os/wasm.zig");
+const alloc = wasm.alloc;
 
 export fn terminal_new(cols: usize, rows: usize) ?*Terminal {
     const term = Terminal.init(alloc, cols, rows) catch return null;
@@ -31,6 +27,6 @@ export fn terminal_free(ptr: ?*Terminal) void {
 
 export fn terminal_print(ptr: ?*Terminal, char: u32) void {
     if (ptr) |t| {
-        t.print(@intCast(u21, char)) catch return null;
+        t.print(@intCast(u21, char)) catch return;
     }
 }