first steps

src/main.zig

@@ -0,0 +1,99 @@
+const std = @import("std");
+const ArrayList = std.ArrayList;
+
+const c = @cImport({
+    @cDefine("DEBUG", "1");
+    @cInclude("stdio.h");
+    @cInclude("cmph.h");
+});
+
+const tempMph = "temp.mph";
+
+pub fn main() !void {
+
+    //    var hash: ?*c.cmph_t = c.cmph_new(config);
+    //    c.cmph_config_destroy(config);
+    //    _ = c.cmph_dump(hash, mphf_fd);
+    //    c.cmph_destroy(hash);
+    //    _ = c.fclose(mphf_fd);
+    //    mphf_fd = c.fopen("temp.mph", "r");
+    //    hash = c.cmph_load(mphf_fd);
+    //    while (i < nkeys) {
+    //        var key: [*c]const u8 = vector[i];
+    //        var id: c_uint = c.cmph_search(hash, key, @bitCast(c.cmph_uint32, @truncate(c_uint, 10)));
+    //        try stdout.print("key:{s} -- hash:{u}\n", key, id);
+    //        i +%= 1;
+    //    }
+    //    c.cmph_destroy(hash);
+    //    c.cmph_io_vector_adapter_destroy(source);
+    //    _ = c.fclose(mphf_fd);
+    //    return 0;
+    //}
+}
+
+test "simple cmph usage" {
+    var arena_instance = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    const arena = arena_instance.allocator();
+    const stdout = std.io.getStdOut().writer();
+    const stderr = std.io.getStdErr().writer();
+
+    _ = stdout;
+    var vector = ArrayList([*:0]const u8).init(arena);
+    try vector.append("aaaaaaaaaa");
+    try vector.append("bbbbbbbbbb");
+    try vector.append("cccccccccc");
+    try vector.append("dddddddddd");
+    try vector.append("eeeeeeeeee");
+    try vector.append("ffffffffff");
+    try vector.append("gggggggggg");
+    try vector.append("hhhhhhhhhh");
+    try vector.append("iiiiiiiiii");
+    try vector.append("jjjjjjjjjj");
+
+    var mphf_fh = try std.fs.cwd().createFile(tempMph, .{});
+    defer {
+        std.fs.cwd().deleteFile(tempMph) catch |err| {
+            stderr.print("error removing file: {s}\n", .{@errorName(err)}) catch {};
+        };
+    }
+    var mphf_fd = c.fdopen(mphf_fh.handle, "w");
+    var vector_len = @truncate(c_uint, vector.items.len);
+    var cvector = @ptrCast([*c][*c]u8, vector.toOwnedSlice().ptr);
+    var source = c.cmph_io_vector_adapter(cvector, vector_len);
+    var config: *c.cmph_config_t = c.cmph_config_new(source) orelse return error.OutOfMemory;
+    c.cmph_config_set_algo(config, c.CMPH_BRZ);
+    c.cmph_config_set_mphf_fd(config, mphf_fd);
+    var hash: *c.cmph_t = c.cmph_new(config) orelse return error.OutOfMemory;
+    c.cmph_config_destroy(config);
+    _ = c.cmph_dump(hash, mphf_fd);
+    c.cmph_destroy(hash);
+    mphf_fh.close();
+
+    mphf_fh = try std.fs.cwd().openFile(tempMph, .{ .mode = .read_only });
+    mphf_fd = c.fdopen(mphf_fh.handle, "r");
+    defer mphf_fh.close();
+
+    var got_hash: ?*c.cmph_t = c.cmph_load(mphf_fd);
+    if (got_hash) |real_hash| {
+        hash = real_hash;
+    } else {
+        try stderr.print("failed to unwrap hash\n", .{});
+    }
+}
+
+const expectEqual = std.testing.expectEqual;
+
+test "char**" {
+    var arena_instance = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    const arena = arena_instance.allocator();
+
+    var arrl = ArrayList([*:0]const u8).init(arena);
+    try arrl.append("foo");
+    try arrl.append("bar");
+
+    var arr: [*][*:0]const u8 = arrl.toOwnedSlice().ptr;
+
+    try expectEqual(@TypeOf(arr[0]), [*:0]const u8);
+    try expectEqual(arr[0][2], 'o');
+    try expectEqual(arr[0][3], 0);
+}