From 755760a79ee31619035a3e8214d26adc274c4470 Mon Sep 17 00:00:00 2001
From: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Sun, 28 Aug 2022 10:24:07 -0700
Subject: [PATCH] pkg/harfbuzz: some functions and tests

---
 pkg/harfbuzz/build.zig   |  2 +-
 pkg/harfbuzz/c.zig       |  4 ++++
 pkg/harfbuzz/main.zig    |  7 +++++-
 pkg/harfbuzz/version.zig | 47 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 pkg/harfbuzz/c.zig
 create mode 100644 pkg/harfbuzz/version.zig

diff --git a/pkg/harfbuzz/build.zig b/pkg/harfbuzz/build.zig
index e110729b8..5b7d63e2c 100644
--- a/pkg/harfbuzz/build.zig
+++ b/pkg/harfbuzz/build.zig
@@ -2,7 +2,7 @@ const std = @import("std");
 
 /// Directories with our includes.
 const root = thisDir() ++ "../../../vendor/harfbuzz/";
-const include_path = root ++ "include";
+const include_path = root ++ "src/";
 
 pub const include_paths = .{include_path};
 
diff --git a/pkg/harfbuzz/c.zig b/pkg/harfbuzz/c.zig
new file mode 100644
index 000000000..958e398ea
--- /dev/null
+++ b/pkg/harfbuzz/c.zig
@@ -0,0 +1,4 @@
+pub usingnamespace @cImport({
+    @cInclude("hb.h");
+    @cInclude("hb-ft.h");
+});
diff --git a/pkg/harfbuzz/main.zig b/pkg/harfbuzz/main.zig
index 1f40f6a44..777a4d571 100644
--- a/pkg/harfbuzz/main.zig
+++ b/pkg/harfbuzz/main.zig
@@ -1 +1,6 @@
-// Todo!
+pub const c = @import("c.zig");
+pub usingnamespace @import("version.zig");
+
+test {
+    @import("std").testing.refAllDecls(@This());
+}
diff --git a/pkg/harfbuzz/version.zig b/pkg/harfbuzz/version.zig
new file mode 100644
index 000000000..0773e22fd
--- /dev/null
+++ b/pkg/harfbuzz/version.zig
@@ -0,0 +1,47 @@
+const std = @import("std");
+const c = @import("c.zig");
+
+pub const Version = struct {
+    major: u32,
+    minor: u32,
+    micro: u32,
+};
+
+/// Returns library version as three integer components.
+pub fn version() Version {
+    var major: c_uint = 0;
+    var minor: c_uint = 0;
+    var micro: c_uint = 0;
+    c.hb_version(&major, &minor, &micro);
+    return .{ .major = major, .minor = minor, .micro = micro };
+}
+
+/// Tests the library version against a minimum value, as three integer components.
+pub fn versionAtLeast(vsn: Version) bool {
+    return c.hb_version_atleast(
+        vsn.major,
+        vsn.minor,
+        vsn.micro,
+    ) > 0;
+}
+
+/// Returns library version as a string with three components.
+pub fn versionString() [:0]const u8 {
+    const res = c.hb_version_string();
+    return std.mem.sliceTo(res, 0);
+}
+
+test {
+    const testing = std.testing;
+
+    // Should be able to get the version
+    const vsn = version();
+    try testing.expect(vsn.major > 0);
+
+    // Should be at least version 1
+    try testing.expect(versionAtLeast(.{
+        .major = 1,
+        .minor = 0,
+        .micro = 0,
+    }));
+}