andrewrk

pub fn add(a: i32, b: i32) i32 {
    return a + b;
}

andrewrk

[nix-shell:~/dev/zig/build]$ ./zig test ../std/os/path.zig --test-filter resolve
Test 1/1 os.path.resolve...OK

[nix-shell:~/dev/zig/build]$ ./zig test ../std/os/path.zig 
/home/andy/dev/zig/std/buffer.zig:105:24: error: container 'Buffer' has no member called 'initFromBuffer'
    var buf2 = %%Buffer.initFromBuffer(&buf);
                       ^
/home/andy/dev/zig/std/buffer.zig:106:15: error: no member named 'eqlBuffer' in 'Buffer'
    assert(buf.eqlBuffer(&buf2));
              ^

andrewrk

Given an unsigned integer, return the number of trailing zero bits

Test framework:

#include <stdio.h>
#include <assert.h>

unsigned trailing_zeros(unsigned n) {
    // fill in this function

andrewrk

const std = @import("std");

const example =
    \\1abc2
    \\pqr3stu8vwx
    \\a1b2c3d4e5f
    \\treb7uchet
;

pub fn main() !void {

andrewrk

andy@ark ~/tmp> gcc -o hello hello.c
andy@ark ~/tmp> strace ./hello
execve("./hello", ["./hello"], 0x7ffe96b5ddb0 /* 62 vars */) = 0
brk(NULL)                               = 0x2129000
access("/etc/ld-nix.so.preload", R_OK)  = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/xg6ilb9g9zhi2zg1dpi4zcp288rhnvns-glibc-2.30/lib/tls/haswell/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/xg6ilb9g9zhi2zg1dpi4zcp288rhnvns-glibc-2.30/lib/tls/haswell/x86_64", 0x7fff2bd55cc0) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/xg6ilb9g9zhi2zg1dpi4zcp288rhnvns-glibc-2.30/lib/tls/haswell/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
stat("/nix/store/xg6ilb9g9zhi2zg1dpi4zcp288rhnvns-glibc-2.30/lib/tls/haswell", 0x7fff2bd55cc0) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/nix/store/xg6ilb9g9zhi2zg1dpi4zcp288rhnvns-glibc-2.30/lib/tls/x86_64/libc.so.6", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or dire

andrewrk

pub export fn _start() void {}

andrewrk

const std = @import("std");

// Although this function looks imperative, note that its job is to
// declaratively construct a build graph that will be executed by an external
// runner.
pub fn build(b: *std.Build) void {
    // Standard target options allows the person running `zig build` to choose
    // what target to build for. Here we do not override the defaults, which
    // means any target is allowed, and the default is native. Other options
    // for restricting supported target set are available.

andrewrk

1. drop db2json.js into your groovebasin instance
2. stop your groove basin instance so that it does not write to the db while you are dumping its data
3. node db2json.js (use the same node.js version as groove basin is using, and it also wants to use the same leveldown dependency you already have installed). It hard-codes the input as groovebasin.db.
4. groovebasin.db.json is created which is 100% of the information from the database, in JSON format. It is one giant map of every key-value pair.

andrewrk

int main(int argc, char **argv) {
    struct SoundIo *soundio = soundio_create();
    if (!soundio) {
        fprintf(stderr, "out of memory\n");
        return 1;
    }
    int err;
    if ((err = soundio_connect(soundio))) {
        fprintf(stderr, "unable to connect: %s\n", soundio_strerror(err));
        soundio_destroy(soundio);

andrewrk

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