Build: Fix #1640: Change strcpy to snprintf.

glslang/MachineIndependent/preprocessor/Pp.cpp

@@ -866,8 +866,7 @@ int TPpContext::CPPextension(TPpToken* ppToken)
     if (token != PpAtomIdentifier)
         parseContext.ppError(ppToken->loc, "extension name expected", "#extension", "");
 
-    assert(strlen(ppToken->name) <= MaxTokenLength);
-    strcpy(extensionName, ppToken->name);
+    snprintf(extensionName, sizeof(extensionName), "%s", ppToken->name);
 
     token = scanToken(ppToken);
     if (token != ':') {

glslang/MachineIndependent/preprocessor/PpScanner.cpp

@@ -1116,7 +1116,7 @@ int TPpContext::tokenize(TPpToken& ppToken)
             parseContext.ppError(ppToken.loc, "character literals not supported", "\'", "");
             continue;
         default:
-            strcpy(ppToken.name, atomStrings.getString(token));
+            snprintf(ppToken.name, sizeof(ppToken.name), "%s", atomStrings.getString(token));
             break;
         }
 
@@ -1185,8 +1185,8 @@ int TPpContext::tokenPaste(int token, TPpToken& ppToken)
         case PpAtomAnd:
         case PpAtomOr:
         case PpAtomXor:
-            strcpy(ppToken.name, atomStrings.getString(resultToken));
-            strcpy(pastedPpToken.name, atomStrings.getString(token));
+            snprintf(ppToken.name, sizeof(ppToken.name), "%s", atomStrings.getString(resultToken));
+            snprintf(pastedPpToken.name, sizeof(pastedPpToken.name), "%s", atomStrings.getString(token));
             break;
         default:
             parseContext.ppError(ppToken.loc, "not supported for these tokens", "##", "");
@@ -1198,7 +1198,8 @@ int TPpContext::tokenPaste(int token, TPpToken& ppToken)
             parseContext.ppError(ppToken.loc, "combined tokens are too long", "##", "");
             return resultToken;
         }
-        strncat(ppToken.name, pastedPpToken.name, MaxTokenLength - strlen(ppToken.name));
+        snprintf(&ppToken.name[0] + strlen(ppToken.name), sizeof(ppToken.name) - strlen(ppToken.name),
+            "%s", pastedPpToken.name);
 
         // correct the kind of token we are making, if needed (identifiers stay identifiers)
         if (resultToken != PpAtomIdentifier) {