From 6671923e966e5fb82eeac52be174fb6295dc9ee7 Mon Sep 17 00:00:00 2001
From: Guus Sliepen <guus@debian.org>
Date: Sat, 21 Nov 2015 17:07:54 +0100
Subject: [PATCH] Fix all issues found by the Clang Static Analyzer.

Only a few were actual errors.
---
 src/CEngine.cpp     |  8 +++-----
 src/CGraphics.cpp   | 12 ++++++++----
 src/CReplayData.cpp |  8 ++++----
 src/cutscene.cpp    |  4 ++--
 src/enemies.cpp     |  4 ++--
 src/game.cpp        | 14 ++++++++------
 src/graphics.cpp    |  4 +---
 src/headers.h       |  4 ++--
 src/info.cpp        |  2 --
 src/intro.cpp       |  6 +++---
 src/items.cpp       |  9 +++------
 src/map.cpp         |  4 +---
 src/mission.cpp     |  6 +-----
 src/particles.cpp   |  2 +-
 src/tankBoss.cpp    |  2 +-
 src/title.cpp       |  2 +-
 src/trains.cpp      |  3 +--
 17 files changed, 42 insertions(+), 52 deletions(-)

diff --git a/src/CEngine.cpp b/src/CEngine.cpp
index d99bb0a..0f4721f 100644
--- a/src/CEngine.cpp
+++ b/src/CEngine.cpp
@@ -918,20 +918,18 @@ bool Engine::loadDefines()
 	if (!loadData("data/defines.h"))
 		return false;
 
-	char *token = strtok((char*)dataBuffer, "\n");
-
-	Data *data;
+	strtok((char*)dataBuffer, "\n");
 
 	while (true)
 	{
-		token = strtok(NULL, "\n");
+		char *token = strtok(NULL, "\n");
 		if (!token)
 			break;
 
 		if (!strstr(token, "/*"))
 		{
 			sscanf(token, "%*s %s %[^\n\r]", string[0], string[1]);
-			data = new Data();
+			Data *data = new Data();
 			data->set(string[0], string[1], 1, 1);
 			defineList.add(data);
 		}
diff --git a/src/CGraphics.cpp b/src/CGraphics.cpp
index 0beb6ca..cde769d 100644
--- a/src/CGraphics.cpp
+++ b/src/CGraphics.cpp
@@ -160,7 +160,8 @@ Sprite *Graphics::getSpriteHead()
 
 void Graphics::setTransparent(SDL_Surface *sprite)
 {
-	SDL_SetColorKey(sprite, SDL_TRUE, SDL_MapRGB(sprite->format, 0, 0, 0));
+	if (sprite)
+		SDL_SetColorKey(sprite, SDL_TRUE, SDL_MapRGB(sprite->format, 0, 0, 0));
 }
 
 bool Graphics::canShowMedalMessage() const
@@ -361,7 +362,7 @@ SDL_Surface *Graphics::loadImage(const char *filename, bool srcalpha)
 	#endif
 
 	if (!image)
-		showErrorAndExit(ERR_FILE, filename);
+		return showErrorAndExit(ERR_FILE, filename), image;
 
 	newImage = SDL_ConvertSurface(image, screen->format, 0);
 
@@ -396,7 +397,7 @@ SDL_Surface *Graphics::loadImage(const char *filename, int hue, int sat, int val
 	#endif
 
 	if (!image)
-		showErrorAndExit(ERR_FILE, filename);
+		return showErrorAndExit(ERR_FILE, filename), image;
 
 	if ((hue != 0) || (sat != 0) || (value != 0))
 	{
@@ -521,6 +522,9 @@ void Graphics::loadMapTiles(const char *baseDir)
 		{
 			tile[i] = loadImage(filename);
 
+			if (!tile[i])
+				abort();
+
 			if (autoAlpha)
 			{
 				if ((i < MAP_EXITSIGN) || (i >= MAP_WATERANIM))
@@ -746,7 +750,7 @@ void Graphics::blit(SDL_Surface *image, int x, int y, SDL_Surface *dest, bool ce
 {
 	if (!image)
 	{
-		showErrorAndExit("graphics::blit() - NULL pointer", SDL_GetError());
+		return showErrorAndExit("graphics::blit() - NULL pointer", SDL_GetError());
 	}
 
 	if ((x < -image->w) || (x > 640 + image->w))
diff --git a/src/CReplayData.cpp b/src/CReplayData.cpp
index 51c1834..747c601 100644
--- a/src/CReplayData.cpp
+++ b/src/CReplayData.cpp
@@ -67,14 +67,14 @@ void ReplayData::setMode(REPLAY_MODE::TYPE replayMode)
 		if (!fp)
 		{
 			printf("ERROR: Replay file '%s' could not be loaded.\n", filename);
-			replayMode = REPLAY_MODE::NONE;
+			this->replayMode = REPLAY_MODE::NONE;
 			return;
 		}
 		
 		if (fread(&header, sizeof(ReplayDataHeader), 1, fp) != 1)
 		{
 			printf("ERROR: Replay file '%s' is corrupt\n", filename);
-			replayMode = REPLAY_MODE::NONE;
+			this->replayMode = REPLAY_MODE::NONE;
 			fclose(fp);
 			return;
 		}
@@ -97,7 +97,7 @@ void ReplayData::setMode(REPLAY_MODE::TYPE replayMode)
 		if (!fp)
 		{
 			printf("ERROR: Replay file '%s' could not be opened for writing.\n", filename);
-			replayMode = REPLAY_MODE::NONE;
+			this->replayMode = REPLAY_MODE::NONE;
 			return;
 		}
 		
@@ -107,7 +107,7 @@ void ReplayData::setMode(REPLAY_MODE::TYPE replayMode)
 		if (size != 1)
 		{
 			printf("Error writing replay data header: %s\n", strerror(errno));
-			replayMode = REPLAY_MODE::NONE;
+			this->replayMode = REPLAY_MODE::NONE;
 			fclose(fp);
 			fp = NULL;
 			return;
diff --git a/src/cutscene.cpp b/src/cutscene.cpp
index 1592add..68672b6 100644
--- a/src/cutscene.cpp
+++ b/src/cutscene.cpp
@@ -64,7 +64,7 @@ void createSceneList()
 			line = strtok(NULL, "\n");
 		}
 		
-		if (strcmp(line, "@none@") != 0)
+		if (scene && strcmp(line, "@none@") != 0)
 		{
 			scene->appendText(line);
 		}
@@ -78,7 +78,7 @@ bool setupScene(const char *stagename)
 	char sceneLine[1024];
 
 	if (!engine.loadData(_("data/ending")))
-		graphics.showErrorAndExit("Couldn't load cutscene data file (%s)", _("data/ending"));
+		return graphics.showErrorAndExit("Couldn't load cutscene data file (%s)", _("data/ending")), false;
 
 	char *line = strtok((char*)engine.dataBuffer, "\n");
 	int i = 0;
diff --git a/src/enemies.cpp b/src/enemies.cpp
index 679d6d9..944eab2 100644
--- a/src/enemies.cpp
+++ b/src/enemies.cpp
@@ -57,7 +57,6 @@ Entity *getEnemy(const char *name)
 
 void addEnemy(const char *name, int x, int y, int flags)
 {
-	Entity *enemy = new Entity();
 	Entity *defEnemy = getDefinedEnemy(name);
 
 	if (defEnemy == NULL)
@@ -66,6 +65,7 @@ void addEnemy(const char *name, int x, int y, int flags)
 		return;
 	}
 
+	Entity *enemy = new Entity();
 	enemy->setName(defEnemy->name);
 	enemy->setSprites(defEnemy->sprite[0], defEnemy->sprite[1], defEnemy->sprite[2]);
 	enemy->currentWeapon = defEnemy->currentWeapon;
@@ -856,7 +856,7 @@ void loadDefEnemies()
 
 	if (!engine.loadData("data/defEnemies"))
 	{
-		graphics.showErrorAndExit("Couldn't load enemy definitions file (%s)", "data/defEnemies");
+		return graphics.showErrorAndExit("Couldn't load enemy definitions file (%s)", "data/defEnemies");
 	}
 
 	char *token = strtok((char*)engine.dataBuffer, "\n");
diff --git a/src/game.cpp b/src/game.cpp
index 7cb8c0f..29aafdf 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -35,7 +35,7 @@ void showInGameOptions()
 {
 	if (!engine.loadWidgets(_("data/inGameWidgets")))
 	{
-		graphics.showErrorAndExit(ERR_FILE, _("data/inGameWidgets"));
+		return graphics.showErrorAndExit(ERR_FILE, _("data/inGameWidgets"));
 	}
 
 	graphics.drawRect(120, 100, 400, 300, graphics.black, graphics.white, graphics.screen);
@@ -288,7 +288,7 @@ int gameover()
 	
 	if (!engine.loadWidgets(_("data/gameOverWidgets")))
 	{
-		graphics.showErrorAndExit(ERR_FILE, _("data/gameOverWidgets"));
+		return graphics.showErrorAndExit(ERR_FILE, _("data/gameOverWidgets")), SECTION_GAME;
 	}
 
 	SDL_Surface *gameover = graphics.quickSprite("Game Over", graphics.loadImage("gfx/main/gameover.png"));
@@ -565,11 +565,11 @@ int doGame()
 	SDL_FillRect(graphics.screen, NULL, graphics.black);
 	graphics.delay(1000);
 
-	Uint32 then, frames, frameLimit, millis;
+	Uint32 frames, frameLimit, millis;
 	Uint32 start, cur;
 
 	#if DEBUG
-	Uint32 now, frameCounter;
+	Uint32 now, then, frameCounter;
 	char fps[10];
 	strlcpy(fps, "fps", sizeof fps);
 	#endif
@@ -614,9 +614,9 @@ int doGame()
 
 	frameLimit = SDL_GetTicks() + 16;
 	frames = millis = 0;
-	start = then = SDL_GetTicks();
+	start = SDL_GetTicks();
 #ifdef DEBUG
-	frameCounter = SDL_GetTicks();
+	then = frameCounter = start;
 #endif
 
 	if ((strcmp(map.name, "Space Station") == 0) && (!game.continueFromCheckPoint))
@@ -795,7 +795,9 @@ int doGame()
 			config.populate();
 			config.doPause();
 			graphics.updateScreen();
+			#ifdef DEBUG
 			then = SDL_GetTicks();
+			#endif
 			frames = 0;
 
 			if (!engine.paused)
diff --git a/src/graphics.cpp b/src/graphics.cpp
index ae6d4a2..7b8da92 100644
--- a/src/graphics.cpp
+++ b/src/graphics.cpp
@@ -25,8 +25,6 @@ void showAllSprites()
 {
 	loadResources();
 
-	Sprite *sprite = graphics.getSpriteHead();
-
 	int x, y, h;
 
 	unsigned int frameLimit = SDL_GetTicks() + 16;
@@ -42,7 +40,7 @@ void showAllSprites()
 
 		SDL_FillRect(graphics.screen, NULL, graphics.black);
 
-		sprite = graphics.getSpriteHead();
+		Sprite *sprite = graphics.getSpriteHead();
 
 		while (sprite->next != NULL)
 		{
diff --git a/src/headers.h b/src/headers.h
index aea64aa..a79edb2 100644
--- a/src/headers.h
+++ b/src/headers.h
@@ -57,8 +57,8 @@ extern DECLSPEC int SDLCALL SDL_GetGamma(float *red, float *green, float *blue);
 #endif
 
 #if !defined(OpenBSD) && !defined(FreeBSD)
-#define strlcat(dest, src, n) strncat((dest), (src), (n) - 1)
-#define strlcpy(dest, src, n) do {strncpy((dest), (src), (n)); (dest)[(n) - 1] = 0;} while(false)
+static inline void strlcat(char *dest, const char *src, size_t n) { strncat(dest, src, n - 1); }
+static inline void strlcpy(char *dest, const char *src, size_t n) { strncpy(dest, src, n); dest[n - 1] = 0; }
 #endif
 
 #include "defs.h"
diff --git a/src/info.cpp b/src/info.cpp
index 8f0822d..f3934e2 100644
--- a/src/info.cpp
+++ b/src/info.cpp
@@ -325,8 +325,6 @@ void doPauseInfo()
 
 	graphics.setFontColor(0xff, 0xff, 0xff, 0x00, 0x00, 0x00);
 
-	y += 10;
-
 	snprintf(string, sizeof string, "%s - %.2d:%.2d:%.2d", _("Mission Time"), game.currentMissionHours, game.currentMissionMinutes, game.currentMissionSeconds);
 	graphics.drawString(string, 320, 430, TXT_CENTERED, graphics.screen);
 }
diff --git a/src/intro.cpp b/src/intro.cpp
index ca84b05..697daf2 100644
--- a/src/intro.cpp
+++ b/src/intro.cpp
@@ -38,7 +38,7 @@ void playIntro(int tx, int ty, int delay)
 
 		if (!line[i])
 		{
-			graphics.showErrorAndExit("Malformed Intro Data", "");
+			return graphics.showErrorAndExit("Malformed Intro Data", "");
 		}
 
 		text[i] = NULL;
@@ -163,11 +163,11 @@ int doIntro()
 
 	audio.playMusic();
 
-	char *line = strtok((char*)engine.dataBuffer, "\n");
+	strtok((char*)engine.dataBuffer, "\n");
 
 	while (true)
 	{
-		line = strtok(NULL, "\n");
+		char *line = strtok(NULL, "\n");
 		sscanf(line, "%d %d %d", &x, &y, &delay);
 
 		if (delay == -1)
diff --git a/src/items.cpp b/src/items.cpp
index 814dead..5b78d4a 100644
--- a/src/items.cpp
+++ b/src/items.cpp
@@ -362,13 +362,10 @@ void showCarriedItems()
 void doItems()
 {
 	Entity *item = (Entity*)map.itemList.getHead();
-	Entity *previous = item;
-
-	int x, y;
 
 	while (item->next != NULL)
 	{
-		previous = item;
+		Entity *previous = item;
 		
 		item = (Entity*)item->next;
 		
@@ -377,8 +374,8 @@ void doItems()
 			continue;
 		}
 
-		x = (int)(item->x - engine.playerPosX);
-		y = (int)(item->y - engine.playerPosY);
+		int x = (int)(item->x - engine.playerPosX);
+		int y = (int)(item->y - engine.playerPosY);
 
 		item->think();
 
diff --git a/src/map.cpp b/src/map.cpp
index 8c3a765..34dbcfa 100644
--- a/src/map.cpp
+++ b/src/map.cpp
@@ -298,8 +298,6 @@ void showMap(int centerX, int centerY)
 	
 	graphics.blit(background, 0, 0, panel, false);
 	
-	int color = graphics.black;
-	
 	for (int y = 0 ; y < 48 ; y++)
 	{
 		for (int x = 0 ; x < 64 ; x++)
@@ -317,7 +315,7 @@ void showMap(int centerX, int centerY)
 	{
 		for (int x = 0 ; x < 64 ; x++)
 		{
-			color = graphics.black;
+			int color = graphics.black;
 
 			if (map.data[x1 + x][y1 + y] == MAP_AIR)
 			{
diff --git a/src/mission.cpp b/src/mission.cpp
index 02d98b7..4519b24 100644
--- a/src/mission.cpp
+++ b/src/mission.cpp
@@ -177,7 +177,6 @@ void showMissionClear()
 	int y = 520;
 	int miaY = 335;
 	int clearY = 520;
-	Objective *objective = (Objective*)map.objectiveList.getHead();
 	Entity *mia = (Entity*)map.miaList.getHead();
 	Sprite *teleportStar = graphics.getSprite("TeleportStar", true);
 	char message[256];
@@ -212,9 +211,6 @@ void showMissionClear()
 		place += 25;
 	}
 
-	if (count > colCount)
-		count = colCount;
-
 	if (place > (colCount * 25))
 		place = colCount * 25;
 
@@ -248,7 +244,7 @@ void showMissionClear()
 		}
 	}
 
-	objective = (Objective*)map.objectiveList.getHead();
+	Objective *objective = (Objective*)map.objectiveList.getHead();
 
 	engine.setPlayerPosition(0, 0, -1, -1, -1, -1);
 
diff --git a/src/particles.cpp b/src/particles.cpp
index 5ea2597..79f71ef 100644
--- a/src/particles.cpp
+++ b/src/particles.cpp
@@ -23,7 +23,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
 void addWindParticles()
 {
-	int c = graphics.white;
+	int c;
 	float x, y, dx, dy;
 	
 
diff --git a/src/tankBoss.cpp b/src/tankBoss.cpp
index 59ed0f1..4cda249 100644
--- a/src/tankBoss.cpp
+++ b/src/tankBoss.cpp
@@ -92,7 +92,7 @@ void traceTankBossMGFireLine()
 		dx = -1;
 	}
 	
-	int x = (int)self->x;
+	int x;
 	int y = (int)self->y + 10;
 	
 	Entity *enemy = NULL;
diff --git a/src/title.cpp b/src/title.cpp
index ae3e889..48c826e 100644
--- a/src/title.cpp
+++ b/src/title.cpp
@@ -477,7 +477,7 @@ void doCredits()
 	int i = 0;
 	int numberOfCredits = 0;
 	int pos1 = 0, pos2 = 0, size = 0;
-	float *y, deviceY;
+	float *y, deviceY = 0;
 
 	SDL_Surface *backdrop = graphics.quickSprite("CreditsBackGround", graphics.loadImage("gfx/main/creditsBack.png"));
 
diff --git a/src/trains.cpp b/src/trains.cpp
index d2a43cb..0357521 100644
--- a/src/trains.cpp
+++ b/src/trains.cpp
@@ -361,7 +361,6 @@ void doTrains()
 		{
 			oldX = (int)train->x;
 			oldY = (int)train->y;
-			playSound = false;
 			
 			playSound = train->openClose();
 			
@@ -385,7 +384,7 @@ void doTrains()
 			setTrainSprite(train);
 		}
 
-		if ((abs(x) <= 800) && (abs(y) <= 600))
+		if (train->sprite && (abs(x) <= 800) && (abs(y) <= 600))
 		{
 			graphics.blit(train->sprite->getCurrentFrame(), x, y, graphics.screen, false);
 		}
-- 
2.39.5