From cee06f041a5d05361bc9d03fa1fe1328d572fbea Mon Sep 17 00:00:00 2001
From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Fri, 1 Jul 2005 07:04:40 +0000
Subject: [PATCH] forbid world writes after precache stage (without using
 sv.state, instead prog->allowworldwrites was added)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@5476 d7cf8633-e32d-0410-b094-e92efae38249
---
 progsvm.h          | 4 ++++
 prvm_execprogram.h | 8 ++++----
 sv_main.c          | 2 ++
 3 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/progsvm.h b/progsvm.h
index 08849458..d86b0b64 100644
--- a/progsvm.h
+++ b/progsvm.h
@@ -328,6 +328,10 @@ typedef struct prvm_prog_s
 	float				*time;
 	float				_time;
 
+	// allow writing to world entity fields, this is set by server init and
+	// cleared before first server frame
+	qboolean			allowworldwrites;
+
 	// name of the prog, e.g. "Server", "Client" or "Menu" (used for text output)
 	char				*name; // [INIT]
 
diff --git a/prvm_execprogram.h b/prvm_execprogram.h
index 07ca7a16..fd50149a 100644
--- a/prvm_execprogram.h
+++ b/prvm_execprogram.h
@@ -189,14 +189,14 @@
 					return;
 				}
 #endif
-				/*if (OPA->edict == 0 && sv.state == ss_active)
+				if (OPA->edict == 0 && !prog->allowworldwrites)
 				{
 					prog->xfunction->profile += profile - startprofile;
 					startprofile = profile;
 					prog->xstatement = st - prog->statements;
 					Host_Error("assignment to world entity in %s", PRVM_NAME);
 					return;
-				}*/
+				}
 				ed = PRVM_PROG_TO_EDICT(OPA->edict);
 				OPC->_int = (qbyte *)((int *)ed->fields.vp + OPB->_int) - (qbyte *)prog->edictsfields;
 				break;
@@ -304,7 +304,7 @@
 				break;
 
 			case OP_STATE:
-				if(prog->flag & PRVM_OP_STATE) 
+				if(prog->flag & PRVM_OP_STATE)
 				{
 					prog->xfunction->profile += profile - startprofile;
 					startprofile = profile;
@@ -317,7 +317,7 @@
 				else
 					PRVM_ERROR("OP_STATE not supported by %s\n", PRVM_NAME);
 				break;
-				
+
 // LordHavoc: to be enabled when Progs version 7 (or whatever it will be numbered) is finalized
 /*
 			case OP_ADD_I:
diff --git a/sv_main.c b/sv_main.c
index f811ee66..019ad9d4 100644
--- a/sv_main.c
+++ b/sv_main.c
@@ -1736,6 +1736,7 @@ void SV_SpawnServer (const char *server)
 	//prog->num_edicts = svs.maxclients+1;
 
 	sv.state = ss_loading;
+	prog->allowworldwrites = true;
 	sv.paused = false;
 
 	*prog->time = sv.time = 1.0;
@@ -1806,6 +1807,7 @@ void SV_SpawnServer (const char *server)
 
 // all setup is completed, any further precache statements are errors
 	sv.state = ss_active;
+	prog->allowworldwrites = false;
 
 // run two frames to allow everything to settle
 	for (i = 0;i < 2;i++)
-- 
2.39.2