From 4264b05e791a02a20fe7c4badf55955acaacc736 Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@zdoom.fake>
Date: Wed, 11 May 2011 22:29:49 +0000
Subject: [PATCH] - added FDARI's ACS savestring submission.

SVN r3204 (trunk)
---
 src/p_acs.cpp | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 src/p_acs.h   |  3 ++-
 2 files changed, 59 insertions(+), 2 deletions(-)

diff --git a/src/p_acs.cpp b/src/p_acs.cpp
index 07b1662be..657151a5d 100644
--- a/src/p_acs.cpp
+++ b/src/p_acs.cpp
@@ -148,6 +148,22 @@ SDWORD ACS_GlobalVars[NUM_GLOBALVARS];
 FWorldGlobalArray ACS_GlobalArrays[NUM_GLOBALVARS];
 
 
+//============================================================================
+//
+// On the fly strings
+//
+//============================================================================
+
+#define LIB_ACSSTRINGS_ONTHEFLY 0x7fff
+#define ACSSTRING_OR_ONTHEFLY (LIB_ACSSTRINGS_ONTHEFLY<<16)
+
+TArray<FString>
+	ACS_StringsOnTheFly,
+	ACS_StringBuilderStack;
+
+#define STRINGBUILDER_START(Builder) if (*Builder.GetChars() || ACS_StringBuilderStack.Size()) { ACS_StringBuilderStack.Push(Builder); Builder = ""; }
+#define STRINGBUILDER_FINISH(Builder) if (!ACS_StringBuilderStack.Pop(Builder)) Builder = "";
+
 //============================================================================
 //
 //
@@ -1738,6 +1754,14 @@ BYTE *FBehavior::NextChunk (BYTE *chunk) const
 const char *FBehavior::StaticLookupString (DWORD index)
 {
 	DWORD lib = index >> 16;
+	
+	switch (lib)
+	{
+	case LIB_ACSSTRINGS_ONTHEFLY:
+		index &= 0xffff;
+		return (ACS_StringsOnTheFly.Size() > index) ? ACS_StringsOnTheFly[index].GetChars() : NULL;
+	}
+
 	if (lib >= (DWORD)StaticModules.Size())
 	{
 		return NULL;
@@ -1885,6 +1909,15 @@ void DACSThinker::Tick ()
 		script->RunScript ();
 		script = next;
 	}
+
+	ACS_StringsOnTheFly.Clear();
+
+	if (ACS_StringBuilderStack.Size())
+	{
+		int size = ACS_StringBuilderStack.Size();
+		ACS_StringBuilderStack.Clear();
+		I_Error("Error: %d garbage entries on ACS string builder stack.", size);
+	}
 }
 
 void DACSThinker::StopScriptsFor (AActor *actor)
@@ -4971,7 +5004,7 @@ int DLevelScript::RunScript ()
 			break;
 
 		case PCD_BEGINPRINT:
-			work = "";
+			STRINGBUILDER_START(work);
 			break;
 
 		case PCD_PRINTSTRING:
@@ -5145,6 +5178,7 @@ int DLevelScript::RunScript ()
 			if (pcd == PCD_ENDLOG)
 			{
 				Printf ("%s\n", work.GetChars());
+				STRINGBUILDER_FINISH(work);
 			}
 			else if (pcd != PCD_MOREHUDMESSAGE)
 			{
@@ -5163,6 +5197,7 @@ int DLevelScript::RunScript ()
 				{
 					C_MidPrint (activefont, work);
 				}
+				STRINGBUILDER_FINISH(work);
 			}
 			else
 			{
@@ -5260,6 +5295,7 @@ int DLevelScript::RunScript ()
 					}
 				}
 			}
+			STRINGBUILDER_FINISH(work);
 			sp = optstart-6;
 			break;
 
@@ -6677,6 +6713,23 @@ int DLevelScript::RunScript ()
 				sp -= 1;
 			}	
 			break;
+
+		case PCD_SAVESTRING:
+			// Saves the string
+			{
+				unsigned int str_otf = ACS_StringsOnTheFly.Push(strbin1(work));
+				if (str_otf > 0xffff)
+				{
+					PushToStack(-1);
+				}
+				else
+				{
+					PushToStack((SDWORD)str_otf|ACSSTRING_OR_ONTHEFLY);
+				}
+				STRINGBUILDER_FINISH(work);
+			}		
+			break;
+
  		}
  	}
 
@@ -6995,3 +7048,6 @@ void DACSThinker::DumpScriptStatus ()
 		script = script->next;
 	}
 }
+
+#undef STRINGBUILDER_START
+#undef STRINGBUILDER_FINISH
diff --git a/src/p_acs.h b/src/p_acs.h
index 8e193d41e..89a5c0b1f 100644
--- a/src/p_acs.h
+++ b/src/p_acs.h
@@ -587,8 +587,9 @@ public:
 		PCD_PRINTBINARY,
 /*350*/	PCD_PRINTHEX,
 		PCD_CALLFUNC,
+		PCD_SAVESTRING,			// [FDARI]
 
-/*351*/	PCODE_COMMAND_COUNT
+/*353*/	PCODE_COMMAND_COUNT
 	};
 
 	// Some constants used by ACS scripts