105 lines
3.3 KiB
Zig
105 lines
3.3 KiB
Zig
const std = @import("std");
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pub const ciutf8 = @import("./ciutf8.zig");
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pub const Uuid = @import("./Uuid.zig");
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pub const DateTime = @import("./DateTime.zig");
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pub const PathIter = @import("./PathIter.zig");
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pub const Url = @import("./Url.zig");
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pub fn cloneStr(str: []const u8, alloc: std.mem.Allocator) ![]const u8 {
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var new = try alloc.alloc(u8, str.len);
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std.mem.copy(u8, new, str);
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return new;
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}
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pub fn deepFree(alloc: ?std.mem.Allocator, val: anytype) void {
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const T = @TypeOf(val);
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switch (@typeInfo(T)) {
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.Pointer => |ptr| switch (ptr.size) {
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.One => alloc.?.destroy(val),
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.Slice => {
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for (val) |v| deepFree(alloc, v);
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alloc.?.free(val);
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},
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else => @compileError("Many and C-style pointers not supported by deepfree"),
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},
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.Optional => if (val) |v| deepFree(alloc, v) else {},
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.Struct => |struct_info| inline for (struct_info.fields) |field| deepFree(alloc, @field(val, field.name)),
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.Union, .ErrorUnion => @compileError("TODO: Unions not yet supported by deepFree"),
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.Array => for (val) |v| deepFree(alloc, v),
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.Enum, .Int, .Float, .Bool, .Void, .Type => {},
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else => @compileError("Type " ++ @typeName(T) ++ " not supported by deepFree"),
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}
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}
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// deepClone assumes the value owns any pointers inside it
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pub fn deepClone(alloc: std.mem.Allocator, val: anytype) !@TypeOf(val) {
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const T = @TypeOf(val);
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var result: T = undefined;
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switch (@typeInfo(T)) {
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.Pointer => |ptr| switch (ptr.size) {
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.One => {
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result = try alloc.create(ptr.child);
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errdefer alloc.free(result);
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result.* = try deepClone(alloc, val.*);
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},
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.Slice => {
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const slice = try alloc.alloc(ptr.child, val.len);
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errdefer alloc.free(slice);
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var count: usize = 0;
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errdefer for (slice[0..count]) |v| deepFree(alloc, v);
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for (val) |v, i| {
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slice[i] = try deepClone(alloc, v);
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count += 1;
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}
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result = slice;
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},
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else => @compileError("Many and C-style pointers not supported"),
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},
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.Optional => {
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result = if (val) |v| try deepClone(alloc, v) else null;
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},
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.Struct => {
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const fields = std.meta.fields(T);
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var count: usize = 0;
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errdefer {
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inline for (fields) |f, i| {
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if (i < count) deepFree(alloc, @field(result, f.name));
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}
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}
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inline for (fields) |f| {
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@field(result, f.name) = try deepClone(alloc, @field(val, f.name));
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count += 1;
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}
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},
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.Array => {
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var count: usize = 0;
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errdefer for (result[0..count]) |v| deepFree(alloc, v);
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for (val) |v, i| {
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result[i] = try deepClone(alloc, v);
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count += 1;
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}
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},
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.Enum, .Int, .Float, .Bool, .Void, .Type => {
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result = val;
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},
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else => @compileError("Type " ++ @typeName(T) ++ " not supported"),
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}
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return result;
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}
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test {
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_ = ciutf8;
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_ = Uuid;
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_ = PathIter;
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_ = DateTime;
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}
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