build(zig): test integrations with C

3 files changed, 57 insertions, 30 deletions

diff --git a/build.zig b/build.zig
index 5e82cec..57e8ff1 100644
--- a/build.zig
+++ b/build.zig
@@ -2,48 +2,45 @@ const std = @import("std");
 
 pub fn build(b: *std.Build) void {
     const target = b.standardTargetOptions(.{});
-    //const optimize = b.standardOptimizeOption(.{});
+    const optimize = b.standardOptimizeOption(.{});
 
     const mod = b.addModule("typdown", .{
         .root_source_file = b.path("src/root.zig"),
         .target = target,
+        .optimize = optimize,
         .link_libc = true,
     });
-
-    //const exe = b.addExecutable(.{
-    //    .name = "typdown",
-    //    .root_module = b.createModule(.{
-    //        .root_source_file = b.path("src/main.zig"),
-    //        .target = target,
-    //        .optimize = optimize,
-    //        .imports = &.{
-    //            .{ .name = "typdown", .module = mod },
-    //        },
-    //    }),
-    //});
-    //b.installArtifact(exe);
-
-    //const run_step = b.step("run", "Run the app");
-    //const run_cmd = b.addRunArtifact(exe);
-    //run_step.dependOn(&run_cmd.step);
-    //run_cmd.step.dependOn(b.getInstallStep());
-
-    //if (b.args) |args| {
-    //    run_cmd.addArgs(args);
-    //}
+    const lib = b.addLibrary(.{
+        .name = "typdown",
+        .linkage = .dynamic,
+        .root_module = mod,
+    });
+    b.installArtifact(lib);
+
+    const example = b.addExecutable(.{
+        .name = "example",
+        .root_module = b.createModule(.{
+            .link_libc = true,
+            .target = target,
+            .optimize = optimize,
+        }),
+    });
+    example.root_module.addCSourceFile(.{
+        .file = b.path("examples/main.c"),
+    });
+    example.root_module.linkLibrary(lib);
+    // manually writing headers because lib.getEmittedH() doesn't work.
+    example.root_module.addIncludePath(b.path("include"));
 
     const mod_tests = b.addTest(.{
         .root_module = mod,
     });
     const run_mod_tests = b.addRunArtifact(mod_tests);
 
-    //const exe_tests = b.addTest(.{
-    //    .root_module = exe.root_module,
-    //});
-
-    //const run_exe_tests = b.addRunArtifact(exe_tests);
-
     const test_step = b.step("test", "Run tests");
     test_step.dependOn(&run_mod_tests.step);
-    //test_step.dependOn(&run_exe_tests.step);
+
+    const examples_step = b.step("examples", "Run examples");
+    const example_run = b.addRunArtifact(example);
+    examples_step.dependOn(&example_run.step);
 }
diff --git a/examples/main.c b/examples/main.c
new file mode 100644
index 0000000..1409bd5
--- /dev/null
+++ b/examples/main.c
@@ -0,0 +1,25 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include "typdown.h"
+
+void foo(char *v) {
+    uint8_t code;
+    char *res = parse(v, &code);
+    if (code == 0) {
+        printf("%s\n", res);
+        free(res);
+    } else printf("cannot parse '%s', error: %s (%d)\n", v, getErrorString(code), code);
+}
+
+int main() {
+    // valid
+    foo("hello world");
+    foo("he*ll*o world");
+    foo("# he*ll*o world");
+
+    // invalid
+    foo("hello *world");
+    foo("# hello :::");
+    return 0;
+}
diff --git a/include/typdown.h b/include/typdown.h
new file mode 100644
index 0000000..4b08aaa
--- /dev/null
+++ b/include/typdown.h
@@ -0,0 +1,5 @@
+#pragma once
+#include <stdint.h>
+
+char * getErrorString(uint8_t);
+char * parse(char *, uint8_t *);