Cache resource file size to avoid excess file->size() calls.

svn-id: r46138

3 files changed, 7 insertions, 5 deletions

diff --git a/engines/saga/resource.cpp b/engines/saga/resource.cpp
index 9590a99272..3bdd8e00db 100644
--- a/engines/saga/resource.cpp
+++ b/engines/saga/resource.cpp
@@ -95,7 +95,7 @@ bool Resource::loadResContext_v1(ResourceContext *context, uint32 contextOffset,
 			resourceData->offset = contextOffset + readS1.readUint32();
 			resourceData->size = readS1.readUint32();
 			//sanity check
-			if ((resourceData->offset > (uint)context->file->size()) || (resourceData->size > contextSize)) {
+			if ((resourceData->offset > (uint)context->fileSize) || (resourceData->size > contextSize)) {
 				result = false;
 				break;
 			}
@@ -123,6 +123,7 @@ bool Resource::loadContext(ResourceContext *context) {
 		return false;
 	}
 
+	context->fileSize = context->file->size();
 	context->isBigEndian = _vm->isBigEndian();
 
 	if (context->fileType & GAME_SWAPENDIAN)
@@ -132,7 +133,7 @@ bool Resource::loadContext(ResourceContext *context) {
 	context->fileType &= ~GAME_MACBINARY;
 
 	if (!isMacBinary) {
-		if (!loadResContext(context, 0, context->file->size())) {
+		if (!loadResContext(context, 0, context->fileSize)) {
 			return false;
 		}
 	} else {
diff --git a/engines/saga/resource.h b/engines/saga/resource.h
index c3554cf7ce..c7d7eb9126 100644
--- a/engines/saga/resource.h
+++ b/engines/saga/resource.h
@@ -69,6 +69,7 @@ struct ResourceContext {
 	const char *fileName;
 	uint16 fileType;
 	Common::File *file;
+	int32 fileSize;
 	int serial;			// IHNM speech files
 
 	bool isCompressed;
diff --git a/engines/saga/resource_rsc.cpp b/engines/saga/resource_rsc.cpp
index 17b330ea5e..035db7723a 100644
--- a/engines/saga/resource_rsc.cpp
+++ b/engines/saga/resource_rsc.cpp
@@ -98,7 +98,7 @@ bool Resource_RSC::loadMacContext(ResourceContext *context) {
 	byte macNameLen;
 	bool notSagaContext = false;
 
-	if (context->file->size() < RSC_MIN_FILESIZE + MAC_BINARY_HEADER_SIZE) {
+	if (context->fileSize < RSC_MIN_FILESIZE + MAC_BINARY_HEADER_SIZE) {
 		return false;
 	}
 
@@ -128,8 +128,8 @@ bool Resource_RSC::loadMacContext(ResourceContext *context) {
 	macDataLength = context->file->readUint32BE();
 	macMapLength = context->file->readUint32BE();
 
-	if (macDataOffset >= (uint)context->file->size() || macMapOffset >= (uint)context->file->size() ||
-		macDataLength + macMapLength > (uint)context->file->size()) {
+	if (macDataOffset >= (uint)context->fileSize || macMapOffset >= (uint)context->fileSize ||
+		macDataLength + macMapLength > (uint)context->fileSize) {
 			return false;
 	}