8df0b64676
Previously, weenieFlags bit 0x80 (UiEffects) was read + discarded with `pos += 4`. Now it is captured into `uiEffects` and surfaced as `Parsed.UiEffects` — the sole wire path for the effect bitfield since PropertyInt.UiEffects (18) has no [AssessmentProperty] and never appears in appraise responses. Test builder gains `uint uiEffects = 0` param; write line updated to use it. Three new parse tests: UiEffects_Captured, UiEffectsThenIconOverlay (cursor-arithmetic regression), and NoUiEffectsBit_LeavesUiEffectsZero. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
532 lines
22 KiB
C#
532 lines
22 KiB
C#
using System.Buffers.Binary;
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using System.Text;
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using AcDream.Core.Items;
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using AcDream.Core.Net.Messages;
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namespace AcDream.Core.Net.Tests.Messages;
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public sealed class CreateObjectTests
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{
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[Fact]
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public void TryParse_WeenieHeaderPrefix_ReturnsNameAndItemType()
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{
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000002u,
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name: "Drudge",
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itemType: (uint)ItemType.Creature);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x50000002u, parsed.Value.Guid);
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Assert.Equal("Drudge", parsed.Value.Name);
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Assert.Equal((uint)ItemType.Creature, parsed.Value.ItemType);
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}
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// -----------------------------------------------------------------------
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// Commit A of 2026-04-29 live-entity collision port:
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// PhysicsState (post-flags u32) + ObjectDescriptionFlags (PWD bitfield)
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// must be surfaced for downstream collision registration.
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// -----------------------------------------------------------------------
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[Fact]
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public void TryParse_PhysicsState_Parsed()
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{
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// ETHEREAL_PS = 0x4 + IGNORE_COLLISIONS_PS = 0x10 → 0x14
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000003u, name: "GhostNpc",
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itemType: (uint)ItemType.Creature,
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physicsState: 0x14u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x14u, parsed!.Value.PhysicsState);
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}
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[Fact]
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public void TryParse_ObjectDescriptionFlags_PlayerKillerBitsSurface()
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{
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// BF_PLAYER (0x8) | BF_PLAYER_KILLER (0x20) → a PK player.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000004u, name: "+PkPlayer",
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itemType: (uint)ItemType.Creature,
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objectDescriptionFlags: 0x8u | 0x20u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x28u, parsed!.Value.ObjectDescriptionFlags);
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}
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[Fact]
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public void TryParse_ObjectDescriptionFlags_PkLiteBit()
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{
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// BF_PLAYER (0x8) | BF_PKLITE_PKSTATUS (0x2000000) → a PK-lite player.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000005u, name: "+PklPlayer",
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itemType: (uint)ItemType.Creature,
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objectDescriptionFlags: 0x8u | 0x2000000u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x2000008u, parsed!.Value.ObjectDescriptionFlags);
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}
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// -----------------------------------------------------------------------
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// 2026-05-15: WeenieHeader optional-tail walker landed for Useability +
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// UseRadius (acclient.h ITEM_USEABLE enum at line 6478). The R-key Use
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// gate consumes Useability; signs without USEABLE_REMOTE (0x20) silently
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// ignore Use.
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// -----------------------------------------------------------------------
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[Fact]
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public void TryParse_NoWeenieFlags_LeavesUseabilityNull()
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{
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// Sign-like entity: weenieFlags=0 (no optional fields).
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// Useability stays null (parser walked past nothing).
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000006u, name: "Holtburg Sign",
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itemType: 0x8000u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Null(parsed!.Value.Useability);
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Assert.Null(parsed.Value.UseRadius);
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}
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[Fact]
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public void TryParse_WeenieFlagsUsable_ReadsUseability()
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{
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// Useable NPC: weenieFlags has bit 0x10 set, body carries
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// ITEM_USEABLE = USEABLE_REMOTE (0x20).
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000007u, name: "Tirenia",
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itemType: (uint)ItemType.Creature,
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weenieFlags: 0x10u,
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useability: 0x20u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x20u, parsed!.Value.Useability);
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}
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[Fact]
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public void TryParse_WeenieFlagsUsable_ReadsUseableNoValue()
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{
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// Holtburg sign case (observed 2026-05-16): ACE sends
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// weenieFlags=0x10 + Useability=USEABLE_NO (0x01) for signs.
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// The parser must read this verbatim — downstream code
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// distinguishes USEABLE_NO from USEABLE_REMOTE for the
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// pickup vs use gate.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x7A9B3001u, name: "Holtburg",
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itemType: 0x80u, // Misc
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weenieFlags: 0x10u,
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useability: 0x01u); // USEABLE_NO
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x01u, parsed!.Value.Useability);
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}
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[Fact]
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public void TryParse_WeenieFlagsValueAndUsableAndUseRadius_AllReadInOrder()
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{
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// Verify the walker skips Value (bit 0x8, 4 bytes) BEFORE reading
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// Useability (bit 0x10) and UseRadius (bit 0x20). Wire order in
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// ACE WorldObject_Networking.cs:99-106 is Value, Useable, UseRadius.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000008u, name: "PriceyDoor",
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itemType: (uint)ItemType.Misc,
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weenieFlags: 0x8u | 0x10u | 0x20u,
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value: 0x12345678u,
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useability: 0x20u,
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useRadius: 2.5f);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x20u, parsed!.Value.Useability);
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Assert.NotNull(parsed.Value.UseRadius);
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Assert.Equal(2.5f, parsed.Value.UseRadius!.Value, precision: 3);
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}
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// -----------------------------------------------------------------------
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// D.5.1 (2026-06-16): IconId was discarded at cs:516 — surface it so the
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// action bar / equipment UI can read icon dat ids from spawn messages.
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// -----------------------------------------------------------------------
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[Fact]
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public void TryParse_IconId_Surfaced()
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{
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// Icon dat id 0x06001234: the wire writer strips the 0x06000000 prefix
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// before packing (WritePackedDwordOfKnownType strips it), so we write
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// 0x1234 as the packed value and expect 0x06001234 back.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000009u,
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name: "SwordIcon",
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itemType: (uint)ItemType.MeleeWeapon,
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iconId: 0x1234u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x06001234u, parsed!.Value.IconId);
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}
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// -----------------------------------------------------------------------
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// D.5.1 (2026-06-17): extended WeenieHeader optional-tail walk — the parser
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// now continues past UseRadius through ALL intervening fields to reach
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// IconOverlay (weenieFlags bit 0x40000000) and IconUnderlay (weenieFlags2
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// bit 0x01, present when objDescFlags bit 0x04000000 is set).
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//
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// Two tests:
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// 1. WithIconOverlay — sets only the IconOverlay bit + the minimum
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// intervening fields (none in this minimal body, so weenieFlags only has
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// 0x40000000). Verifies the parse walks to IconOverlay and captures it.
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// 2. WithIconOverlayAndUnderlay — sets IconOverlay + the IncludesSecondHeader
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// objDescFlag + weenieFlags2 bit 0x01, writes both ids, asserts both are
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// captured.
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// 3. NoOverlayBits_CommonCase — weenieFlags=0, verifies the extended walk
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// produces no overlay (regression guard for the common spawn path).
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// -----------------------------------------------------------------------
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[Fact]
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public void TryParse_IconOverlay_CapturedFromExtendedTail()
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{
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// Only IconOverlay (0x40000000) bit set in weenieFlags. No intervening
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// optional fields, so the extended tail immediately reads the overlay id.
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// ACE WritePackedDwordOfKnownType strips the 0x06000000 prefix before
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// packing; the reader ORs it back in.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x5000000Au,
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name: "EnchantedSword",
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itemType: (uint)ItemType.MeleeWeapon,
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weenieFlags: 0x40000000u, // IconOverlay
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iconOverlayId: 0x1ABCu); // will be read back as 0x06001ABC
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x06001ABCu, parsed!.Value.IconOverlayId);
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Assert.Equal(0u, parsed.Value.IconUnderlayId);
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}
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[Fact]
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public void TryParse_IconOverlayAndUnderlay_BothCaptured()
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{
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// IncludesSecondHeader in objDescFlags (0x04000000) makes the parser read
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// weenieFlags2. weenieFlags2 bit 0x01 (IconUnderlay) triggers the underlay
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// read. Both overlay + underlay are captured.
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// objectDescriptionFlags: 0x04000000 = IncludesSecondHeader
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// weenieFlags: 0x40000000 = IconOverlay
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// weenieFlags2: 0x00000001 = IconUnderlay
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x5000000Bu,
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name: "MagicRing",
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itemType: (uint)ItemType.Jewelry,
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objectDescriptionFlags: 0x04000000u,
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weenieFlags: 0x40000000u,
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weenieFlags2: 0x00000001u,
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iconOverlayId: 0x5678u, // → 0x06005678
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iconUnderlayId: 0x9ABCu); // → 0x06009ABC
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x06005678u, parsed!.Value.IconOverlayId);
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Assert.Equal(0x06009ABCu, parsed.Value.IconUnderlayId);
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}
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[Fact]
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public void TryParse_NoOverlayBits_CommonCase_OverlaysStayZero()
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{
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// Regression guard: most spawned entities (creatures, scenery, players)
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// have weenieFlags=0 and no second-header. The extended walk must not
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// corrupt existing parsed fields and must leave overlay ids at zero.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x5000000Cu,
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name: "CommonDrudge",
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itemType: (uint)ItemType.Creature,
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weenieFlags: 0u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal("CommonDrudge", parsed!.Value.Name);
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Assert.Equal(0u, parsed.Value.IconOverlayId);
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Assert.Equal(0u, parsed.Value.IconUnderlayId);
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Assert.Null(parsed.Value.Useability);
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}
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[Fact]
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public void TryParse_IntermediateFieldsBeforeIconOverlay_SkippedCorrectly()
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{
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// Verifies the cursor arithmetic for fields between UseRadius and
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// IconOverlay. This body sets several intermediate bits (Structure u16,
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// MaxStructure u16, StackSize u16, Burden u16) plus IconOverlay.
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// If any skip is wrong, the parser reads the wrong bytes as the
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// overlay id or throws, both of which the assert would catch.
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// 0x00000400 = Structure (u16)
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// 0x00000800 = MaxStructure (u16)
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// 0x00001000 = StackSize (u16)
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// 0x00200000 = Burden (u16)
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// 0x40000000 = IconOverlay
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const uint flags = 0x40000000u | 0x00200000u | 0x00001000u | 0x00000800u | 0x00000400u;
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x5000000Du,
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name: "FancySword",
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itemType: (uint)ItemType.MeleeWeapon,
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weenieFlags: flags,
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structure: 50,
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maxStructure: 100,
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stackSize: 1,
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burden: 300,
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iconOverlayId: 0x2222u); // → 0x06002222
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x06002222u, parsed!.Value.IconOverlayId);
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}
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[Fact]
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public void TryParse_HouseRestrictionsSkipped_ThenIconOverlayCaptured()
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{
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// Verifies that the variable-length RestrictionDB skip (weenieFlags bit
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// 0x04000000) lands the cursor at the correct position so that
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// IconOverlay (bit 0x40000000) immediately after it is still captured.
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//
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// Wire layout per ACE RestrictionDB (16 bytes, zero entries):
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// Version(u32) + OpenStatus(u32) + MonarchId(u32) = 12 bytes
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// count(u16) + numBuckets(u16) = 4 bytes
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// entries: count(0) × 8 = 0 bytes
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// total = 16 bytes
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//
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// Also exercises the IncludesSecondHeader / IconUnderlay path so that
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// all three optional-tail branches that follow HouseOwner are covered
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// in a single cursor sweep.
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//
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// weenieFlags: 0x04000000 (HouseRestrictions) | 0x40000000 (IconOverlay)
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// objectDescriptionFlags: 0x04000000 (IncludesSecondHeader → weenieFlags2 present)
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// weenieFlags2: 0x00000001 (IconUnderlay)
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x5000000Eu,
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name: "HousePortal",
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itemType: (uint)ItemType.Portal,
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objectDescriptionFlags: 0x04000000u, // IncludesSecondHeader
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weenieFlags: 0x04000000u | 0x40000000u, // HouseRestrictions + IconOverlay
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weenieFlags2: 0x00000001u, // IconUnderlay
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iconOverlayId: 0x3333u, // → 0x06003333
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iconUnderlayId: 0x4444u); // → 0x06004444
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x06003333u, parsed!.Value.IconOverlayId);
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Assert.Equal(0x06004444u, parsed.Value.IconUnderlayId);
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}
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// -----------------------------------------------------------------------
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// D.5.2 (2026-06-17): UiEffects bitfield (weenieFlags bit 0x80) — captured
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// instead of skipped. Drives the icon's effect-overlay recolor.
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// -----------------------------------------------------------------------
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[Fact]
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public void TryParse_UiEffects_Captured()
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{
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// weenieFlags 0x80 = UiEffects; value 0x1 = Magical.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000010u, name: "MagicWand", itemType: (uint)ItemType.Caster,
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weenieFlags: 0x80u, uiEffects: 0x1u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x1u, parsed!.Value.UiEffects);
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}
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[Fact]
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public void TryParse_UiEffectsThenIconOverlay_BothCaptured()
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{
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// Verifies the cursor still reaches IconOverlay after reading (not skipping) UiEffects.
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000011u, name: "GlowSword", itemType: (uint)ItemType.MeleeWeapon,
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weenieFlags: 0x80u | 0x40000000u, uiEffects: 0x4u, iconOverlayId: 0x1ABCu);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0x4u, parsed!.Value.UiEffects);
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Assert.Equal(0x06001ABCu, parsed.Value.IconOverlayId);
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}
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[Fact]
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public void TryParse_NoUiEffectsBit_LeavesUiEffectsZero()
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{
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byte[] body = BuildMinimalCreateObjectWithWeenieHeader(
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guid: 0x50000012u, name: "PlainRock", itemType: (uint)ItemType.Misc, weenieFlags: 0u);
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var parsed = CreateObject.TryParse(body);
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Assert.NotNull(parsed);
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Assert.Equal(0u, parsed!.Value.UiEffects);
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}
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private static byte[] BuildMinimalCreateObjectWithWeenieHeader(
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uint guid,
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string name,
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uint itemType,
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uint physicsState = 0,
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uint objectDescriptionFlags = 0,
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uint weenieFlags = 0,
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uint weenieFlags2 = 0,
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uint iconId = 0,
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uint uiEffects = 0,
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uint? value = null,
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uint? useability = null,
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float? useRadius = null,
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uint iconOverlayId = 0,
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uint iconUnderlayId = 0,
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// intermediate fields for cursor-arithmetic test
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ushort? structure = null,
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ushort? maxStructure = null,
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ushort? stackSize = null,
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ushort? burden = null)
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{
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var bytes = new List<byte>();
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WriteU32(bytes, CreateObject.Opcode);
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WriteU32(bytes, guid);
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// ModelData header: marker, subpalette count, texture count, animpart count.
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bytes.Add(0x11);
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bytes.Add(0);
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bytes.Add(0);
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bytes.Add(0);
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// PhysicsData: physics flags = 0, then PhysicsState u32, then 9 seq stamps.
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WriteU32(bytes, 0);
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WriteU32(bytes, physicsState);
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for (int i = 0; i < 9; i++)
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WriteU16(bytes, 0);
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Align4(bytes);
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// Fixed WeenieHeader prefix per ACE SerializeCreateObject.
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WriteU32(bytes, weenieFlags); // weenieFlags
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WriteString16L(bytes, name);
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WritePackedDword(bytes, 0x1234); // WeenieClassId
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WritePackedDword(bytes, iconId); // IconId via known-type writer (prefix stripped by ACE writer)
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WriteU32(bytes, itemType);
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WriteU32(bytes, objectDescriptionFlags);
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Align4(bytes);
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// IncludesSecondHeader → weenieFlags2 written immediately after the align,
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// before any other optional tail field (ACE WorldObject_Networking.cs:84-85).
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if ((objectDescriptionFlags & 0x04000000u) != 0)
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WriteU32(bytes, weenieFlags2);
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// Optional WeenieHeader tail — same order as ACE
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// WorldObject_Networking.cs:87-206. Each field is written only when
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// its weenieFlags bit is set, matching the parser's walker exactly.
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// Fields not parameterized above default to 0.
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if ((weenieFlags & 0x00000001u) != 0) { /* PluralName — not parameterized */ }
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if ((weenieFlags & 0x00000002u) != 0) bytes.Add(0); // ItemsCapacity u8
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if ((weenieFlags & 0x00000004u) != 0) bytes.Add(0); // ContainersCapacity u8
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if ((weenieFlags & 0x00000100u) != 0) WriteU16(bytes, 0); // AmmoType u16
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if ((weenieFlags & 0x00000008u) != 0) WriteU32(bytes, value ?? 0u); // Value u32
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if ((weenieFlags & 0x00000010u) != 0) WriteU32(bytes, useability ?? 0u); // Usable u32
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if ((weenieFlags & 0x00000020u) != 0) // UseRadius f32
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{
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Span<byte> tmp = stackalloc byte[4];
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BinaryPrimitives.WriteSingleLittleEndian(tmp, useRadius ?? 0f);
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bytes.AddRange(tmp.ToArray());
|
||
}
|
||
if ((weenieFlags & 0x00080000u) != 0) WriteU32(bytes, 0); // TargetType u32
|
||
if ((weenieFlags & 0x00000080u) != 0) WriteU32(bytes, uiEffects); // UiEffects u32
|
||
if ((weenieFlags & 0x00000200u) != 0) bytes.Add(0); // CombatUse sbyte/1 byte
|
||
if ((weenieFlags & 0x00000400u) != 0) WriteU16(bytes, structure ?? 0); // Structure u16
|
||
if ((weenieFlags & 0x00000800u) != 0) WriteU16(bytes, maxStructure ?? 0); // MaxStructure u16
|
||
if ((weenieFlags & 0x00001000u) != 0) WriteU16(bytes, stackSize ?? 0); // StackSize u16
|
||
if ((weenieFlags & 0x00002000u) != 0) WriteU16(bytes, 0); // MaxStackSize u16
|
||
if ((weenieFlags & 0x00004000u) != 0) WriteU32(bytes, 0); // Container u32
|
||
if ((weenieFlags & 0x00008000u) != 0) WriteU32(bytes, 0); // Wielder u32
|
||
if ((weenieFlags & 0x00010000u) != 0) WriteU32(bytes, 0); // ValidLocations u32
|
||
if ((weenieFlags & 0x00020000u) != 0) WriteU32(bytes, 0); // CurrentlyWieldedLocation u32
|
||
if ((weenieFlags & 0x00040000u) != 0) WriteU32(bytes, 0); // Priority u32
|
||
if ((weenieFlags & 0x00100000u) != 0) bytes.Add(0); // RadarBlipColor u8
|
||
if ((weenieFlags & 0x00800000u) != 0) bytes.Add(0); // RadarBehavior u8
|
||
if ((weenieFlags & 0x08000000u) != 0) WriteU16(bytes, 0); // PScript u16
|
||
if ((weenieFlags & 0x01000000u) != 0) // Workmanship f32
|
||
{
|
||
Span<byte> tmp = stackalloc byte[4];
|
||
BinaryPrimitives.WriteSingleLittleEndian(tmp, 0f);
|
||
bytes.AddRange(tmp.ToArray());
|
||
}
|
||
if ((weenieFlags & 0x00200000u) != 0) WriteU16(bytes, burden ?? 0); // Burden u16
|
||
if ((weenieFlags & 0x00400000u) != 0) WriteU16(bytes, 0); // Spell u16
|
||
if ((weenieFlags & 0x02000000u) != 0) WriteU32(bytes, 0); // HouseOwner u32
|
||
// HouseRestrictions (0x04000000): not parameterized (zero entries).
|
||
// Wire: Version(u32) + OpenStatus(u32) + MonarchId(u32) + count(u16) + numBuckets(u16) + entries.
|
||
// Zero entries → 16 bytes total.
|
||
if ((weenieFlags & 0x04000000u) != 0)
|
||
{
|
||
WriteU32(bytes, 0x10000002u); // Version
|
||
WriteU32(bytes, 0u); // OpenStatus
|
||
WriteU32(bytes, 0u); // MonarchId
|
||
WriteU16(bytes, 0); // count
|
||
WriteU16(bytes, 768); // numBuckets (retail constant)
|
||
}
|
||
if ((weenieFlags & 0x20000000u) != 0) WriteU32(bytes, 0); // HookItemTypes u32
|
||
if ((weenieFlags & 0x00000040u) != 0) WriteU32(bytes, 0); // Monarch u32
|
||
if ((weenieFlags & 0x10000000u) != 0) WriteU16(bytes, 0); // HookType u16
|
||
if ((weenieFlags & 0x40000000u) != 0) WritePackedDword(bytes, iconOverlayId); // IconOverlay
|
||
if ((weenieFlags2 & 0x00000001u) != 0) WritePackedDword(bytes, iconUnderlayId); // IconUnderlay
|
||
|
||
return bytes.ToArray();
|
||
}
|
||
|
||
private static void WriteU32(List<byte> bytes, uint value)
|
||
{
|
||
Span<byte> tmp = stackalloc byte[4];
|
||
BinaryPrimitives.WriteUInt32LittleEndian(tmp, value);
|
||
bytes.AddRange(tmp.ToArray());
|
||
}
|
||
|
||
private static void WriteU16(List<byte> bytes, ushort value)
|
||
{
|
||
Span<byte> tmp = stackalloc byte[2];
|
||
BinaryPrimitives.WriteUInt16LittleEndian(tmp, value);
|
||
bytes.AddRange(tmp.ToArray());
|
||
}
|
||
|
||
private static void WritePackedDword(List<byte> bytes, uint value)
|
||
{
|
||
if (value <= 0x7FFF)
|
||
{
|
||
WriteU16(bytes, (ushort)value);
|
||
return;
|
||
}
|
||
|
||
WriteU16(bytes, (ushort)(((value >> 16) & 0x7FFF) | 0x8000));
|
||
WriteU16(bytes, (ushort)(value & 0xFFFF));
|
||
}
|
||
|
||
private static void WriteString16L(List<byte> bytes, string value)
|
||
{
|
||
byte[] encoded = Encoding.GetEncoding(1252).GetBytes(value);
|
||
WriteU16(bytes, checked((ushort)encoded.Length));
|
||
bytes.AddRange(encoded);
|
||
Align4(bytes);
|
||
}
|
||
|
||
private static void Align4(List<byte> bytes)
|
||
{
|
||
while ((bytes.Count & 3) != 0)
|
||
bytes.Add(0);
|
||
}
|
||
}
|