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update to latest zig

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This commit is contained in:
Andrew Kelley 2018-03-27 17:57:07 -04:00
parent 7e4872a02c
commit a2a3fc57d1
2 changed files with 12 additions and 20 deletions
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2
build.zig
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@ -1,6 +1,6 @@
const Builder = @import("std").build.Builder; const Builder = @import("std").build.Builder;
pub fn build(b: &Builder) { pub fn build(b: &Builder) void {
const mode = b.standardReleaseOptions(); const mode = b.standardReleaseOptions();
const exe = b.addExecutable("sdl-zig-demo", "src/main.zig"); const exe = b.addExecutable("sdl-zig-demo", "src/main.zig");
exe.setBuildMode(mode); exe.setBuildMode(mode);

30
src/main.zig
View File

@ -10,13 +10,7 @@ const assert = @import("std").debug.assert;
// SDL_video.h:#define SDL_WINDOWPOS_UNDEFINED_MASK 0x1FFF0000u // SDL_video.h:#define SDL_WINDOWPOS_UNDEFINED_MASK 0x1FFF0000u
const SDL_WINDOWPOS_UNDEFINED = @bitCast(c_int, c.SDL_WINDOWPOS_UNDEFINED_MASK); const SDL_WINDOWPOS_UNDEFINED = @bitCast(c_int, c.SDL_WINDOWPOS_UNDEFINED_MASK);
// Zig does not support extern unions yet. extern fn SDL_PollEvent(event: &c.SDL_Event) c_int;
// See https://github.com/zig-lang/zig/issues/144
const SDL_Event = extern struct {
_type: c.Uint32,
_union: [56]u8,
};
extern fn SDL_PollEvent(event: &SDL_Event) -> c_int;
// SDL_RWclose is fundamentally unrepresentable in Zig, because `ctx` is // SDL_RWclose is fundamentally unrepresentable in Zig, because `ctx` is
// evaluated twice. One could make the case that this is a bug in SDL, // evaluated twice. One could make the case that this is a bug in SDL,
@ -26,7 +20,7 @@ extern fn SDL_PollEvent(event: &SDL_Event) -> c_int;
// it would resolve the SDL bug as well as make the function visible to Zig // it would resolve the SDL bug as well as make the function visible to Zig
// and to debuggers. // and to debuggers.
// SDL_rwops.h:#define SDL_RWclose(ctx) (ctx)->close(ctx) // SDL_rwops.h:#define SDL_RWclose(ctx) (ctx)->close(ctx)
inline fn SDL_RWclose(ctx: &c.SDL_RWops) -> c_int { inline fn SDL_RWclose(ctx: &c.SDL_RWops) c_int {
const aligned_ctx = @alignCast(@alignOf(my_SDL_RWops), ctx); const aligned_ctx = @alignCast(@alignOf(my_SDL_RWops), ctx);
const casted_ctx = @ptrCast(&my_SDL_RWops, aligned_ctx); const casted_ctx = @ptrCast(&my_SDL_RWops, aligned_ctx);
return casted_ctx.close(casted_ctx); return casted_ctx.close(casted_ctx);
@ -34,16 +28,14 @@ inline fn SDL_RWclose(ctx: &c.SDL_RWops) -> c_int {
// Zig does not support extern unions yet. // Zig does not support extern unions yet.
// See https://github.com/zig-lang/zig/issues/144 // See https://github.com/zig-lang/zig/issues/144
const my_SDL_RWops = extern struct { const my_SDL_RWops = extern struct {
size: extern fn(), size: extern fn()void,
seek: extern fn(), seek: extern fn()void,
read: extern fn(), read: extern fn()void,
write: extern fn(), write: extern fn()void,
close: extern fn(context: &my_SDL_RWops)->c_int, close: extern fn(context: &my_SDL_RWops)c_int,
}; };
error SDLInitializationFailed; pub fn main() !void {
pub fn main() -> %void {
if (c.SDL_Init(c.SDL_INIT_VIDEO) != 0) { if (c.SDL_Init(c.SDL_INIT_VIDEO) != 0) {
c.SDL_Log(c"Unable to initialize SDL: %s", c.SDL_GetError()); c.SDL_Log(c"Unable to initialize SDL: %s", c.SDL_GetError());
return error.SDLInitializationFailed; return error.SDLInitializationFailed;
@ -68,7 +60,7 @@ pub fn main() -> %void {
defer c.SDL_DestroyRenderer(renderer); defer c.SDL_DestroyRenderer(renderer);
const zig_bmp = @embedFile("zig.bmp"); const zig_bmp = @embedFile("zig.bmp");
const rw = c.SDL_RWFromConstMem(@ptrCast(&c_void, &zig_bmp[0]), c_int(zig_bmp.len)) ?? { const rw = c.SDL_RWFromConstMem(@ptrCast(&const c_void, &zig_bmp[0]), c_int(zig_bmp.len)) ?? {
c.SDL_Log(c"Unable to get RWFromConstMem: %s", c.SDL_GetError()); c.SDL_Log(c"Unable to get RWFromConstMem: %s", c.SDL_GetError());
return error.SDLInitializationFailed; return error.SDLInitializationFailed;
}; };
@ -88,9 +80,9 @@ pub fn main() -> %void {
var quit = false; var quit = false;
while (!quit) { while (!quit) {
var event: SDL_Event = undefined; var event: c.SDL_Event = undefined;
while (SDL_PollEvent(&event) != 0) { while (SDL_PollEvent(&event) != 0) {
switch (event._type) { switch (event.@"type") {
c.SDL_QUIT => { c.SDL_QUIT => {
quit = true; quit = true;
}, },