Add support for Valve search paths to GetFileSize native (bug 5931, r=asherkin).

core/logic/intercom.h

@@ -51,7 +51,7 @@ using namespace SourceHook;
  * Add 1 to the RHS of this expression to bump the intercom file
  * This is to prevent mismatching core/logic binaries
  */
-#define SM_LOGIC_MAGIC		(0x0F47C0DE - 26)
+#define SM_LOGIC_MAGIC		(0x0F47C0DE - 27)
 
 #if defined SM_LOGIC
 class IVEngineServer
@@ -82,6 +82,7 @@ public:
 	virtual char *ReadLine(char *pOutput, int maxChars, FileHandle_t file) = 0;
 	virtual bool EndOfFile(FileHandle_t file) = 0;
 	virtual bool FileExists(const char *pFileName, const char *pPathID = 0) = 0;
+	virtual unsigned int Size(const char *pFileName, const char *pPathID = 0) = 0;
 };
 
 namespace SourceMod

core/logic/smn_filesystem.cpp

@@ -426,6 +426,18 @@ static cell_t sm_FileSize(IPluginContext *pContext, const cell_t *params)
 		return -1;
 	}
 
+	if (params[0] >= 2 && params[2] == 1)
+	{
+		if (smcore.filesystem->FileExists(name))
+		{
+			return smcore.filesystem->Size(name);
+		}
+		else
+		{
+			return -1;
+		}
+	}
+
 	char realpath[PLATFORM_MAX_PATH];
 	g_pSM->BuildPath(Path_Game, realpath, sizeof(realpath), "%s", name);
 #ifdef PLATFORM_WINDOWS