tiny.wayland.protocol.value.validate

1pub const validate = @import("validate.zig");

1const decode = @import("decode.zig");2const protocol = @import("../root.zig");34pub fn message(5    metadata: *const protocol.schema.Message,6    payload: []const u8,7    descriptors: []const @import("sys").fd.Descriptor,8) decode.Error!void {9    var decoder = try decode.Decoder.init(metadata, payload, descriptors);10    var optional = false;11    for (metadata.signature) |symbol| switch (symbol) {12        '0'...'9' => {},13        '?' => optional = true,14        'i' => {15            _ = try decoder.signed();16            optional = false;17        },18        'u' => {19            _ = try decoder.unsigned();20            optional = false;21        },22        'f' => {23            _ = try decoder.fixed();24            optional = false;25        },26        's' => {27            if (optional) {28                _ = try decoder.optionalString();29            } else {30                _ = try decoder.string();31            }32            optional = false;33        },34        'o' => {35            if (optional) {36                _ = try decoder.optionalObject();37            } else {38                _ = try decoder.object();39            }40            optional = false;41        },42        'n' => {43            _ = try decoder.newId();44            optional = false;45        },46        'a' => {47            _ = try decoder.array();48            optional = false;49        },50        'h' => {51            _ = try decoder.descriptor();52            optional = false;53        },54        else => unreachable,55    };56    if (optional) unreachable;57    try decoder.finish();58}5960test "generic validation follows expanded scanner signatures" {61    const std = @import("std");62    const encode = @import("encode.zig");63    const bind = &protocol.core.wl_registry.requests.bind;64    var encoder = try encode.Encoder.init(std.testing.allocator, encode.default_capacity);65    defer encoder.deinit();66    try encoder.unsigned(4);67    try encoder.dynamicNewId("wl_output", 3, try .init(9));68    const encoded = try encoder.finish(bind);69    try message(bind, encoded.payload, encoded.descriptors);7071    try std.testing.expectError(72        error.IncompletePayload,73        message(bind, encoded.payload[0 .. encoded.payload.len - 4], encoded.descriptors),74    );75}7677test "generic validation applies nullable wire modifiers" {78    const metadata: protocol.schema.Message = .{79        .name = "nullable",80        .opcode = 0,81        .since = 1,82        .deprecated_since = null,83        .destructor = false,84        .signature = "?s?o",85        .descriptor_count = 0,86        .minimum_payload_size = 8,87        .arguments = &.{},88    };89    try message(&metadata, &(@as([8]u8, @splat(0))), &.{});90}