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const std = @import("std");
const Allocator = std.mem.Allocator;
const ArenaAllocator = std.heap.ArenaAllocator;
const glib = @import("glib");
const gobject = @import("gobject");
/// A boxed type that holds a list of string slices.
pub const StringList = struct {
arena: ArenaAllocator,
strings: []const [:0]const u8,
pub fn create(
alloc: Allocator,
strings: []const [:0]const u8,
) Allocator.Error!*StringList {
var arena: ArenaAllocator = .init(alloc);
errdefer arena.deinit();
const arena_alloc = arena.allocator();
var stored = try arena_alloc.alloc([:0]const u8, strings.len);
for (strings, 0..) |s, i| stored[i] = try arena_alloc.dupeZ(u8, s);
const ptr = try alloc.create(StringList);
errdefer alloc.destroy(ptr);
ptr.* = .{ .arena = arena, .strings = stored };
return ptr;
}
pub fn deinit(self: *StringList) void {
self.arena.deinit();
}
pub fn destroy(self: *StringList) void {
const alloc = self.arena.child_allocator;
self.deinit();
alloc.destroy(self);
}
/// Returns the general-purpose allocator used by this StringList.
pub fn allocator(self: *const StringList) Allocator {
return self.arena.child_allocator;
}
pub const getGObjectType = gobject.ext.defineBoxed(
StringList,
.{
.name = "GhosttyStringList",
.funcs = .{
.copy = &struct {
fn copy(self: *StringList) callconv(.c) *StringList {
return StringList.create(
self.arena.child_allocator,
self.strings,
) catch @panic("OOM");
}
}.copy,
.free = &struct {
fn free(self: *StringList) callconv(.c) void {
self.destroy();
}
}.free,
},
},
);
};
test "StringList create and destroy" {
const testing = std.testing;
const alloc = testing.allocator;
const input: []const [:0]const u8 = &.{ "hello", "world" };
const list = try StringList.create(alloc, input);
defer list.destroy();
try testing.expectEqual(@as(usize, 2), list.strings.len);
try testing.expectEqualStrings("hello", list.strings[0]);
try testing.expectEqualStrings("world", list.strings[1]);
}
test "StringList create empty list" {
const testing = std.testing;
const alloc = testing.allocator;
const input: []const [:0]const u8 = &.{};
const list = try StringList.create(alloc, input);
defer list.destroy();
try testing.expectEqual(@as(usize, 0), list.strings.len);
}
test "StringList boxedCopy and boxedFree" {
const testing = std.testing;
const alloc = testing.allocator;
const input: []const [:0]const u8 = &.{ "foo", "bar", "baz" };
const original = try StringList.create(alloc, input);
defer original.destroy();
const copied: *StringList = @ptrCast(@alignCast(gobject.boxedCopy(
StringList.getGObjectType(),
original,
)));
defer gobject.boxedFree(StringList.getGObjectType(), copied);
try testing.expectEqual(@as(usize, 3), copied.strings.len);
try testing.expectEqualStrings("foo", copied.strings[0]);
try testing.expectEqualStrings("bar", copied.strings[1]);
try testing.expectEqualStrings("baz", copied.strings[2]);
try testing.expect(original.strings.ptr != copied.strings.ptr);
}
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