mirror/uvm32
1
Fork 0
mirror of https://github.com/ringtailsoftware/uvm32.git synced 2026-06-05 22:43:39 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add UVM32_SYSCALL_RAND to get a "true" random number from the host, as I want to play zigtris and not have it be the same every time.

Browse source
This commit is contained in:
Toby Jaffey 2025-12-17 20:19:31 +00:00
parent 3d83844d5c
commit d780c4e69d
6 changed files with 18 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

1
apps/common/uvm32_target.h
View file

@ -50,6 +50,7 @@ static uint32_t syscall(uint32_t id, uint32_t param1, uint32_t param2) {
#define printbuf(x, y) syscall_cast(UVM32_SYSCALL_PRINTBUF, x, y)
#define render(x, y) syscall_cast(UVM32_SYSCALL_RENDER, x, y)
#define getkey() syscall_cast(UVM32_SYSCALL_GETKEY, 0, 0)
#define rand() syscall_cast(UVM32_SYSCALL_RAND, 0, 0)
extern char _estack;

2
apps/zigtris/src/main.zig
View file

@ -10,7 +10,7 @@ export fn main() void {
var gameRunning = true;
var lastUpdate:u32 = 0;
zigtris.gamesetup(console, uvm.millis()) catch |err| {
zigtris.gamesetup(console, uvm.rand()) catch |err| {
_ = console.print("err {any}\n", .{err}) catch 0;
_ = console.flush() catch 0;
return;

4
apps/zigtris/src/uvm.zig
View file

@ -27,6 +27,10 @@ pub inline fn millis() u32 {
return syscall(uvm32.UVM32_SYSCALL_MILLIS, 0, 0);
}
pub inline fn rand() u32 {
return syscall(uvm32.UVM32_SYSCALL_RAND, 0, 0);
}
// dupeZ would be better, but want to avoid using an allocator
// this is of course, unsafe...
var termination_buf:[128]u8 = undefined;