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Geoff Catlin gcatlin

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gcatlin / go_c_go_alloc.go
Last active December 11, 2024 19:07
Minimal example of Go calling C calling a Go function pointer for memory allocation that C writes to
package main
/*
#include <stdint.h>
#include <stdlib.h>
typedef struct {
void **ptr;
uintptr_t *handle;
uintptr_t size;
@gcatlin
gcatlin / keybase.md
Created March 12, 2019 00:26
keybase.md

Keybase proof

I hereby claim:

  • I am gcatlin on github.
  • I am gcatlin (https://keybase.io/gcatlin) on keybase.
  • I have a public key ASDOkhxPwBV28ND_Pzm3rzNcVWViUFUakYvCgFb8dC-kiQo

To claim this, I am signing this object:

@gcatlin
gcatlin / glfw-opengl-example.c
Last active December 21, 2024 23:57
Minimal C GLFW OpenGL example
//
// cc glfw-opengl-example.c glad.c -lglfw
//
#include "glad.h" // https://glad.dav1d.de/
#include <GLFW/glfw3.h>
static void quit(GLFWwindow *window, int key, int scancode, int action, int mods)
{
if (key == GLFW_KEY_ESCAPE && action == GLFW_PRESS) {
glfwSetWindowShouldClose(window, GLFW_TRUE);
@gcatlin
gcatlin / sdl-opengl-example.c
Last active November 1, 2024 00:07
Minimal C SDL2 OpenGL example
//
// cc main.c glad.c -lSDL2
//
#include "glad.h" // https://glad.dav1d.de/
#include <SDL2/SDL.h>
#include <SDL2/SDL_opengl.h>
#include <stdbool.h>
int main()
{
@gcatlin
gcatlin / glfw-metal-example.m
Last active October 13, 2025 01:15
Minimal C GLFW Metal example
//
// cc glfw-metal-example.m `pkg-config --cflags --libs glfw3` -framework AppKit -framework Metal -framework QuartzCore
//
#define GLFW_INCLUDE_NONE
#define GLFW_EXPOSE_NATIVE_COCOA
#include <GLFW/glfw3.h>
#include <GLFW/glfw3native.h>
#import <Metal/Metal.h>
#import <QuartzCore/CAMetalLayer.h>
@gcatlin
gcatlin / sdl-metal-example.m
Last active February 24, 2025 15:11
Minimal C SDL2 Metal example
//
// cc sdl-metal-example.m `sdl2-config --cflags --libs` -framework Metal -framework QuartzCore && ./a.out
//
#include <SDL.h>
#import <Metal/Metal.h>
#import <QuartzCore/CAMetalLayer.h>
int main (int argc, char *args[])
{
SDL_SetHint(SDL_HINT_RENDER_DRIVER, "metal");
@gcatlin
gcatlin / core-audio-sine-wave.c
Last active September 8, 2025 02:04
Core Audio sine wave example
// To run:
// clang core-audio-sine-wave.c -framework AudioUnit && ./a.out
#include <AudioUnit/AudioUnit.h>
#define SAMPLE_RATE 48000
#define TONE_FREQUENCY 440
#define M_TAU 2.0 * M_PI
OSStatus RenderSineWave(
void *inRefCon,
@gcatlin
gcatlin / build.sh
Created July 13, 2015 14:07
Dynamic loading/unloading of Go shared library
#!/bin/sh
go build -buildmode=c-shared lib.go
clang main.m -g -Wall -Werror -Wfatal-errors -pedantic -Wno-c11-extensions -Wno-unused-variable -Wno-unused-function -o main.out
@gcatlin
gcatlin / triangle.go
Created January 12, 2015 13:10
Go SDL2 OpenGL minimal example
package main
import (
"runtime"
"github.com/go-gl/gl"
"github.com/veandco/go-sdl2/sdl"
)
func main() {
@gcatlin
gcatlin / multiple-error-handlers.php
Created May 30, 2013 13:53
Adds support for multiple error handlers in PHP
<?php
function append_error_handler($handler) {
set_error_handlers(array(set_error_handler($handler), $handler));
}
function prepend_error_handler($handler) {
set_error_handlers(array($handler, set_error_handler($handler)));
}