LAB: Constify some parameters

7 files changed, 30 insertions, 32 deletions

diff --git a/engines/lab/dispman.cpp b/engines/lab/dispman.cpp
index 9dbaf8d374..d493e935c5 100644
--- a/engines/lab/dispman.cpp
+++ b/engines/lab/dispman.cpp
@@ -69,7 +69,6 @@ DisplayMan::~DisplayMan() {
 	delete[] _displayBuffer;
 }
 
-// From readPict.c.  Reads in pictures and animations from disk.
 void DisplayMan::loadPict(const Common::String filename) {
 	freePict();
 	_curBitmap = _vm->_resource->openDataFile(filename);
@@ -89,11 +88,9 @@ void DisplayMan::loadBackPict(const Common::String fileName, uint16 *highPal) {
 	_vm->_anim->_noPalChange = false;
 }
 
-void DisplayMan::readPict(Common::String filename, bool playOnce, bool onlyDiffData, byte *memoryBuffer, uint16 maxHeight) {
+void DisplayMan::readPict(const Common::String filename, bool playOnce, bool onlyDiffData, byte *memoryBuffer, uint16 maxHeight) {
 	_vm->_anim->stopDiff();
-
 	loadPict(filename);
-
 	_vm->_music->updateMusic();
 
 	if (!_vm->_music->_loopSoundEffect)
@@ -544,7 +541,7 @@ void DisplayMan::closeFont(TextFont **font) {
 	}
 }
 
-uint16 DisplayMan::textLength(TextFont *font, Common::String text) {
+uint16 DisplayMan::textLength(TextFont *font, const Common::String text) {
 	uint16 length = 0;
 
 	if (font) {
@@ -561,7 +558,7 @@ uint16 DisplayMan::textHeight(TextFont *tf) {
 	return (tf) ? tf->_height : 0;
 }
 
-void DisplayMan::drawText(TextFont *tf, uint16 x, uint16 y, uint16 color, Common::String text) {
+void DisplayMan::drawText(TextFont *tf, uint16 x, uint16 y, uint16 color, const Common::String text) {
 	byte *vgaTop = getCurrentDrawingBuffer();
 	int numChars = text.size();
 
@@ -730,7 +727,7 @@ void DisplayMan::copyPage(uint16 width, uint16 height, uint16 nheight, uint16 st
 	}
 }
 
-void DisplayMan::doScrollWipe(Common::String filename) {
+void DisplayMan::doScrollWipe(const Common::String filename) {
 	_vm->_event->mouseHide();
 	uint16 width = _vm->_utils->vgaScaleX(320);
 	uint16 height = _vm->_utils->vgaScaleY(149) + _vm->_utils->svgaCord(2);
@@ -824,7 +821,7 @@ void DisplayMan::doScrollBounce() {
 	_vm->_event->mouseShow();
 }
 
-void DisplayMan::doTransWipe(CloseDataPtr *closePtrList, Common::String filename) {
+void DisplayMan::doTransWipe(CloseDataPtr *closePtrList, const Common::String filename) {
 	uint16 lastY, linesLast;
 
 	if (_vm->_isHiRes) {
@@ -911,7 +908,7 @@ void DisplayMan::doTransWipe(CloseDataPtr *closePtrList, Common::String filename
 	delete[] bitMapBuffer;
 }
 
-void DisplayMan::doTransition(TransitionType transitionType, CloseDataPtr *closePtrList, Common::String filename) {
+void DisplayMan::doTransition(TransitionType transitionType, CloseDataPtr *closePtrList, const Common::String filename) {
 	switch (transitionType) {
 	case kTransitionWipe:
 	case kTransitionTransporter:
diff --git a/engines/lab/dispman.h b/engines/lab/dispman.h
index 1ca58874ca..a88923ee4c 100644
--- a/engines/lab/dispman.h
+++ b/engines/lab/dispman.h
@@ -85,7 +85,7 @@ public:
 	/**
 	 * Reads in a picture into the display bitmap.
 	 */
-	void readPict(Common::String filename, bool playOnce = true, bool onlyDiffData = false, byte *memoryBuffer = nullptr, uint16 maxHeight = 0);
+	void readPict(const Common::String filename, bool playOnce = true, bool onlyDiffData = false, byte *memoryBuffer = nullptr, uint16 maxHeight = 0);
 	void freePict();
 
 	/**
@@ -97,7 +97,7 @@ public:
 	/**
 	 * Scrolls the display to a new picture from a black screen.
 	 */
-	void doScrollWipe(Common::String filename);
+	void doScrollWipe(const Common::String filename);
 
 	/**
 	 * Does the scroll bounce.  Assumes bitmap already in memory.
@@ -107,12 +107,12 @@ public:
 	/**
 	 * Does the transporter wipe.
 	 */
-	void doTransWipe(CloseDataPtr *closePtrList, Common::String filename);
+	void doTransWipe(CloseDataPtr *closePtrList, const Common::String filename);
 
 	/**
 	 * Does a certain number of pre-programmed wipes.
 	 */
-	void doTransition(TransitionType transitionType, CloseDataPtr *closePtrList, Common::String filename);
+	void doTransition(TransitionType transitionType, CloseDataPtr *closePtrList, const Common::String filename);
 
 	/**
 	 * Changes the front screen to black.
@@ -259,7 +259,7 @@ public:
 	/**
 	 * Returns the length of a text in the specified font.
 	 */
-	uint16 textLength(TextFont *font, Common::String text);
+	uint16 textLength(TextFont *font, const Common::String text);
 
 	/**
 	 * Returns the height of a specified font.
@@ -269,7 +269,7 @@ public:
 	/**
 	 * Draws the text to the screen.
 	 */
-	void drawText(TextFont *tf, uint16 x, uint16 y, uint16 color, Common::String text);
+	void drawText(TextFont *tf, uint16 x, uint16 y, uint16 color, const Common::String text);
 
 	/**
 	 * Gets a line of text for flowText; makes sure that its length is less than
diff --git a/engines/lab/lab.h b/engines/lab/lab.h
index 295d913d3f..74fbd2a8ae 100644
--- a/engines/lab/lab.h
+++ b/engines/lab/lab.h
@@ -252,7 +252,7 @@ private:
 	/**
 	 * Does what's necessary for the monitor.
 	 */
-	void doMonitor(Common::String background, Common::String textfile, bool isinteractive, Common::Rect textRect);
+	void doMonitor(const Common::String background, const Common::String textfile, bool isinteractive, Common::Rect textRect);
 
 	/**
 	 * Does the things to properly set up the detective notes.
@@ -454,7 +454,7 @@ private:
 	void performAction(uint16 actionMode, Common::Point curPos, uint16 &curInv);
 
 private:
-	bool saveGame(int slot, Common::String desc);
+	bool saveGame(int slot, const Common::String desc);
 	bool loadGame(int slot);
 	void writeSaveGameHeader(Common::OutSaveFile *out, const Common::String &saveName);
 };
diff --git a/engines/lab/resource.cpp b/engines/lab/resource.cpp
index a9d8441984..b5ecb0b2bc 100644
--- a/engines/lab/resource.cpp
+++ b/engines/lab/resource.cpp
@@ -164,43 +164,44 @@ void Resource::freeViews(uint16 roomNum) {
 	freeRule(_vm->_rooms[roomNum]._rules);
 }
 
-Common::String Resource::translateFileName(Common::String filename) {
-	filename.toUppercase();
+Common::String Resource::translateFileName(const Common::String filename) {
+	Common::String upperFilename = filename;
+	upperFilename.toUppercase();
 	Common::String fileNameStrFinal;
 
-	if (filename.hasPrefix("P:") || filename.hasPrefix("F:")) {
+	if (upperFilename.hasPrefix("P:") || upperFilename.hasPrefix("F:")) {
 		if (_vm->_isHiRes)
 			fileNameStrFinal = "GAME/SPICT/";
 		else
 			fileNameStrFinal = "GAME/PICT/";
 
 		if (_vm->getPlatform() == Common::kPlatformAmiga) {
-			if (filename.hasPrefix("P:")) {
+			if (upperFilename.hasPrefix("P:")) {
 				fileNameStrFinal = "PICT/";
 			} else {
 				fileNameStrFinal = "LABFONTS/";
-				filename += "T";	// all the Amiga fonts have a ".FONT" suffix
+				upperFilename += "T";	// all the Amiga fonts have a ".FONT" suffix
 			}
 		}
-	} else if (filename.hasPrefix("LAB:")) {
+	} else if (upperFilename.hasPrefix("LAB:")) {
 		if (_vm->getPlatform() != Common::kPlatformAmiga)
 			fileNameStrFinal = "GAME/";
-	} else if (filename.hasPrefix("MUSIC:")) {
+	} else if (upperFilename.hasPrefix("MUSIC:")) {
 		if (_vm->getPlatform() != Common::kPlatformAmiga)
 			fileNameStrFinal = "GAME/MUSIC/";
 		else
 			fileNameStrFinal = "MUSIC/";
 	}
 
-	if (filename.contains(':')) {
-		while (filename[0] != ':') {
-			filename.deleteChar(0);
+	if (upperFilename.contains(':')) {
+		while (upperFilename[0] != ':') {
+			upperFilename.deleteChar(0);
 		}
 
-		filename.deleteChar(0);
+		upperFilename.deleteChar(0);
 	}
 
-	fileNameStrFinal += filename;
+	fileNameStrFinal += upperFilename;
 
 	return fileNameStrFinal;
 }
diff --git a/engines/lab/resource.h b/engines/lab/resource.h
index f4aa35738e..73757e8247 100644
--- a/engines/lab/resource.h
+++ b/engines/lab/resource.h
@@ -119,7 +119,7 @@ private:
 	ViewData *readView(Common::File *file);
 	void freeView(ViewData *view);
 	void readStaticText();
-	Common::String translateFileName(Common::String filename);
+	Common::String translateFileName(const Common::String filename);
 
 	Common::String _staticText[48];
 };
diff --git a/engines/lab/savegame.cpp b/engines/lab/savegame.cpp
index 2ea481d3c2..a0d7fe9667 100644
--- a/engines/lab/savegame.cpp
+++ b/engines/lab/savegame.cpp
@@ -122,7 +122,7 @@ bool readSaveGameHeader(Common::InSaveFile *in, SaveGameHeader &header) {
 /**
  * Writes the game out to disk.
  */
-bool LabEngine::saveGame(int slot, Common::String desc) {
+bool LabEngine::saveGame(int slot, const Common::String desc) {
 	Common::String fileName = generateSaveFileName(slot);
 	Common::SaveFileManager *saveFileManager = g_system->getSavefileManager();
 	Common::OutSaveFile *file = saveFileManager->openForSaving(fileName);
diff --git a/engines/lab/special.cpp b/engines/lab/special.cpp
index ddc7ea49e4..946277b8f0 100644
--- a/engines/lab/special.cpp
+++ b/engines/lab/special.cpp
@@ -443,7 +443,7 @@ void LabEngine::processMonitor(char *ntext, TextFont *monitorFont, bool isIntera
 	}
 }
 
-void LabEngine::doMonitor(Common::String background, Common::String textfile, bool isinteractive, Common::Rect textRect) {
+void LabEngine::doMonitor(const Common::String background, const Common::String textfile, bool isinteractive, Common::Rect textRect) {
 	Common::Rect scaledRect = _utils->vgaRectScale(textRect.left, textRect.top, textRect.right, textRect.bottom);
 	_monitorTextFilename = textfile;