Fixed glitched map when the encounter table has no available entries

(ref. fallout2-ce/fallout2-ce#313)

Updated sslc document.

artifacts/scripting/compiler/sslc_readme.md

@@ -323,6 +323,8 @@ Syntax which requires sfall for compiled scripts to be interpreted is marked by
 
   __NOTE:__ Just like `for` loop, `continue` statement will respect increments of a hidden counter variable, so you can safely use it inside `foreach`.
 
+- `#pragma sce` directive. If present anywhere in the script source, it will enable short-circuit evaluation for all the logical `AND` and `OR` operators, even if the command line option `-s` is not used.
+
 ---
 
 ### Fixes
@@ -348,6 +350,10 @@ There are several changes in this version of sslc which may result in problems f
 
 ### Changelog
 
+**sfall 4.4.10:**
+- added `#pragma sce` directive
+- added support for nested array expressions
+
 **sfall 4.4.7:**
 - fixed leftover stack data caused by the `break` statement
 - added Linux & WebAssembly builds

sfall/Modules/BugFixes.cpp

@@ -3603,6 +3603,33 @@ skip:
 	}
 }
 
+static __declspec(naked) void wmRndEncounterPick_hack() {
+	static const DWORD wmRndEncounterPick_Ret = 0x4C0F86;
+	__asm {
+		cmp  dword ptr [esp + 0xD0 - 0x20 + 4], 0; // candidatesLength
+		jle  skip;
+		mov  edx, STAT_lu; // overwritten engine code
+		retn;
+skip:
+		mov  eax, -1; // error (no candidate)
+		add  esp, 4;
+		jmp  wmRndEncounterPick_Ret; // exit from func
+	}
+}
+
+static __declspec(naked) void wmRndEncounterOccurred_hook_pick() {
+	static const DWORD wmRndEncounterOccurred_Ret = 0x4C0BD4;
+	__asm {
+		call fo::funcoffs::wmRndEncounterPick_;
+		test eax, eax;
+		js   skip; // -1 - no encounter candidate
+		retn;
+skip:
+		add  esp, 4;
+		jmp  wmRndEncounterOccurred_Ret; // continue movement
+	}
+}
+
 // Missing game initialization
 void BugFixes::OnBeforeGameInit() {
 	Initialization();
@@ -4506,6 +4533,10 @@ void BugFixes::init() {
 	// Fix incorrect upper limit in mouse_set_sensitivity_ engine function
 	SafeWrite8(0x4CAC54, 0x77); // jae > ja
 	SafeWrite8(0x50FA0A, 0x04); // 2.5 (was 2.0)
+
+	// Fix for getting stuck on an empty map when the encounter table has no available entries
+	MakeCall(0x4C0DF3, wmRndEncounterPick_hack);
+	HookCall(0x4C080A, wmRndEncounterOccurred_hook_pick);
 }
 
 }

sfall/version.h

@@ -25,6 +25,6 @@
 #define VERSION_MAJOR 3
 #define VERSION_MINOR 8
 #define VERSION_BUILD 49
-#define VERSION_REV 1
+#define VERSION_REV 2
 
-#define VERSION_STRING "3.8.49.1"
+#define VERSION_STRING "3.8.49.2"