Cross platform update -- merge branch 'JacobHin2-jacobhin2'

README.md

@@ -1,5 +1,5 @@
 # DOOMFIRE
-Test your TTY might!
+## Test your TTY's might!
 
 ![demo](https://user-images.githubusercontent.com/76228776/149635702-a331f892-7799-4f7f-a4a6-7048d3529dcf.mp4)
 
@@ -8,7 +8,11 @@ The doom-fire algo can push upwards of 180k a frame - results may vary!  It is,
 As a comparable, this is the younger sibling of a node variant ( https://github.com/const-void/DOOM-fire-node ).
 
 # INSTALL
-Tested on OX Monterey / M1 w/zig 0.9...unsure if it will work on Win or Linux, sadly, due to TIOCGWINSZ flag. No third party dependencies!
+Tested on OX Monterey / M1 w/zig 0.9...
+
+EDIT: Now tested on Artix Linux - links against libc to get the size of the TTY.
+
+This means that the program does rely on libc, this shouldn't be a problem.
 
 ```
 $ git clone https://github.com/const-void/DOOM-fire-zig/
@@ -22,6 +26,7 @@ $ zig build run
 * kitty.app - great
 * Terminal.app - poor -- seems to drop framerates 
 * VS Code - great
+* Alacritty (artix linux) - great
 
 # Inspiration / Credits
 * doom fire    - https://github.com/filipedeschamps/doom-fire-algorithm,  https://github.com/fabiensanglard/DoomFirePSX/blob/master/flames.html

build.zig

@@ -12,6 +12,8 @@ pub fn build(b: *std.build.Builder) void {
     const mode = b.standardReleaseOptions();
 
     const exe = b.addExecutable("DOOM-fire", "src/main.zig");
+
+    exe.linkLibC();
     exe.setTarget(target);
     exe.setBuildMode(mode);
     exe.install();

src/main.zig

@@ -4,14 +4,17 @@
 // Copy/paste as it helps!
 //
 const std = @import("std");
+const c = @cImport({
+    @cInclude("sys/ioctl.h");
+});
 
 const allocator = std.heap.page_allocator;
 
 const stdout = std.io.getStdOut().writer();
 const stdin = std.io.getStdIn().reader();
 
 ///////////////////////////////////
-// Tested on M1 osx12.1
+// Tested on M1 osx12.1 + Artix Linux.
 //   fast  - vs code terminal
 //   slow  - Terminal.app
 ///////////////////////////////////
@@ -79,8 +82,8 @@ pub fn emitFmt(comptime s: []const u8, args: anytype) void {
 
 //// Settings
 
-//OSX specific ... maybe
-const TIOCGWINSZ = 0x40087468; //ioctl flag
+// Get this value from libc.
+const TIOCGWINSZ = c.TIOCGWINSZ; // ioctl flag
 
 //term size
 const TermSz = struct { height: usize, width: usize };
@@ -143,7 +146,7 @@ pub fn initColor() void {
 
 //get terminal size given a tty
 pub fn getTermSz(tty: std.os.fd_t) !TermSz {
-    var winsz = std.os.system.winsize{ .ws_col = 0, .ws_row = 0, .ws_xpixel = 0, .ws_ypixel = 0 };
+    var winsz = c.winsize{ .ws_col = 0, .ws_row = 0, .ws_xpixel = 0, .ws_ypixel = 0 };
     const rv = std.os.system.ioctl(tty, TIOCGWINSZ, @ptrToInt(&winsz));
     const err = std.os.errno(rv);
     if (rv == 0) {