use unsigned comparisons for most of the boundschecks in the vm

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@11938 d7cf8633-e32d-0410-b094-e92efae38249
::stable-branch::merge=26678e90426687f151e496d496a8cc4957e0fcba

diff --git a/prvm_execprogram.h b/prvm_execprogram.h
index 8c6b0e47eb3e66b9c6bb183073f6c8c53717845b..9620daca72176be7c4c45717970c2e2114561a81 100644 (file)
--- a/prvm_execprogram.h
+++ b/prvm_execprogram.h
@@ -187,7 +187,7 @@
                        case OP_STOREP_FLD:             // integers
                        case OP_STOREP_S:
                        case OP_STOREP_FNC:             // pointers
-                               if (OPB->_int < 0 || OPB->_int + 1 > prog->entityfieldsarea)
+                               if ((unsigned int)OPB->_int >= (unsigned int)prog->entityfieldsarea)
                                {
                                        PreError();
                                        prog->error_cmd("%s attempted to write to an out of bounds edict (%i)", prog->name, (int)OPB->_int);
@@ -220,7 +220,7 @@
                                break;
 
                        case OP_ADDRESS:
-                               if (OPA->edict < 0 || OPA->edict >= prog->max_edicts)
+                               if ((unsigned int)OPA->edict >= (unsigned int)prog->max_edicts)
                                {
                                        PreError();
                                        prog->error_cmd("%s Progs attempted to address an out of bounds edict number", prog->name);
@@ -249,7 +249,7 @@
                        case OP_LOAD_ENT:
                        case OP_LOAD_S:
                        case OP_LOAD_FNC:
-                               if (OPA->edict < 0 || OPA->edict >= prog->max_edicts)
+                               if ((unsigned int)OPA->edict >= (unsigned int)prog->max_edicts)
                                {
                                        PreError();
                                        prog->error_cmd("%s Progs attempted to read an out of bounds edict number", prog->name);
@@ -266,7 +266,7 @@
                                break;
 
                        case OP_LOAD_V:
-                               if (OPA->edict < 0 || OPA->edict >= prog->max_edicts)
+                               if ((unsigned int)OPA->edict >= (unsigned int)prog->max_edicts)
                                {
                                        PreError();
                                        prog->error_cmd("%s Progs attempted to read an out of bounds edict number", prog->name);