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mach: wasm: implement logging and panic handler

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iddev5 2022-05-22 13:25:31 +05:30 • committed by Stephen Gutekanst
parent c8c6dab65b
commit f7301cc242
2 changed files with 46 additions and 0 deletions
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33
src/wasm.zig
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@ -11,6 +11,11 @@ const js = struct {
extern fn machCanvasSetSize(canvas: CanvasId, width: u32, height: u32) void;
extern fn machCanvasGetWidth(canvas: CanvasId) u32;
extern fn machCanvasGetHeight(canvas: CanvasId) u32;
extern fn machLog(str: [*]const u8, len: u32) void;
extern fn machLogWrite(str: [*]const u8, len: u32) void;
extern fn machLogFlush() void;
extern fn machPanic(str: [*]const u8, len: u32) void;
};
pub const CanvasId = u32;
@ -75,3 +80,31 @@ export fn wasmUpdate() bool {
export fn wasmDeinit() void {
app.deinit(&engine);
}
pub const log_level = .info;
const LogError = error{};
const LogWriter = std.io.Writer(void, LogError, writeLog);
fn writeLog(_: void, msg: []const u8) LogError!usize {
js.machLogWrite(msg.ptr, msg.len);
return msg.len;
}
pub fn log(
comptime message_level: std.log.Level,
comptime scope: @Type(.EnumLiteral),
comptime format: []const u8,
args: anytype,
) void {
const prefix = if (scope == .default) ": " else "(" ++ @tagName(scope) ++ "): ";
const writer = LogWriter{ .context = {} };
writer.print(message_level.asText() ++ prefix ++ format ++ "\n", args) catch return;
js.machLogFlush();
}
pub fn panic(msg: []const u8, _: ?*std.builtin.StackTrace) noreturn {
js.machPanic(msg.ptr, msg.len);
unreachable;
}