Clean up stringop-truncation warnings

src/CMakeLists.txt

@@ -310,9 +310,7 @@ target_compile_options(SRB2SDL2 PRIVATE
 
 		$<$<VERSION_GREATER_EQUAL:$<C_COMPILER_VERSION>,8.1.0>:
 			-Wno-error=format-overflow
-			-Wno-error=stringop-truncation
 			-Wno-format-overflow
-			-Wno-stringop-truncation
 			-Wno-error=multistatement-macros
 		>
 

src/Makefile.d/versions.mk

@@ -135,9 +135,7 @@ ifdef GCC71
 endif
 ifdef GCC81
  WFLAGS+=-Wno-error=format-overflow
- WFLAGS+=-Wno-error=stringop-truncation
  WFLAGS+=-Wno-format-overflow
- WFLAGS+=-Wno-stringop-truncation
  WFLAGS+=-Wno-error=multistatement-macros
 endif
 

src/command.c

@@ -2060,16 +2060,16 @@ void CV_StealthSet(consvar_t *var, const char *value)
   */
 static void CV_SetValueMaybeStealth(consvar_t *var, INT32 value, boolean stealth)
 {
-	char val[SKINNAMESIZE+1];
+	char val[SKINNAMESIZE+1] = "None";
 
 	if (var == &cv_forceskin) // Special handling.
 	{
 		const char *tmpskin = NULL;
 		if ((value < 0) || (value >= numskins))
-			tmpskin = "None";
+			;
 		else
 			tmpskin = skins[value]->name;
-		strncpy(val, tmpskin, SKINNAMESIZE);
+		memcpy(val, tmpskin, SKINNAMESIZE);
 	}
 	else
 		sprintf(val, "%d", value);

src/deh_soc.c

@@ -324,7 +324,7 @@ void readPlayer(MYFILE *f, INT32 num)
 			if (fastcmp(word, "PICNAME"))
 			{
 				SLOTFOUND
-				strncpy(description[num].picname, word2, 8);
+				strncpy(description[num].picname, word2, sizeof(description[num].picname)-1);
 			}
 			else if (fastcmp(word, "DISPLAYNAME"))
 			{
@@ -355,7 +355,7 @@ void readPlayer(MYFILE *f, INT32 num)
 			else if (fastcmp(word, "NAMETAG") || fastcmp(word, "TAGNAME"))
 			{
 				SLOTFOUND
-				strncpy(description[num].nametag, word2, 8);
+				strncpy(description[num].nametag, word2, sizeof(description[num].nametag)-1);
 			}
 			else if (fastcmp(word, "TAGTEXTCOLOR") || fastcmp(word, "TAGTEXTCOLOUR"))
 			{
@@ -1163,7 +1163,7 @@ void readgametype(MYFILE *f, char *gtname)
 	INT16 newgtrankingstype = -1;
 	int newgtinttype = 0;
 	char gtdescription[441];
-	char gtconst[MAXLINELEN];
+	char gtconst[MAXLINELEN+1];
 
 	// Empty strings.
 	gtdescription[0] = '\0';
@@ -1677,7 +1677,7 @@ void readlevelheader(MYFILE *f, INT32 num)
 			else if (fastcmp(word, "SKYNUM"))
 				mapheaderinfo[num-1]->skynum = (INT16)i;
 			else if (fastcmp(word, "INTERSCREEN"))
-				strncpy(mapheaderinfo[num-1]->interscreen, word2, 8);
+				strncpy(mapheaderinfo[num-1]->interscreen, word2, sizeof(mapheaderinfo[num-1]->interscreen)-1);
 			else if (fastcmp(word, "PRECUTSCENENUM"))
 				mapheaderinfo[num-1]->precutscenenum = (UINT8)i;
 			else if (fastcmp(word, "CUTSCENENUM"))
@@ -2294,7 +2294,7 @@ static void readtextpromptpage(MYFILE *f, INT32 num, INT32 pagenum)
 					char name[34];
 					name[0] = '\x82'; // color yellow
 					name[1] = 0;
-					strncat(name, word2, 33);
+					strncat(name, word2, 32);
 					name[33] = 0;
 
 					// Replace _ with ' '
@@ -2304,7 +2304,7 @@ static void readtextpromptpage(MYFILE *f, INT32 num, INT32 pagenum)
 							name[j] = ' ';
 					}
 
-					strncpy(textprompts[num]->page[pagenum].name, name, 32);
+					strncpy(textprompts[num]->page[pagenum].name, name, sizeof(textprompts[num]->page[pagenum].name));
 				}
 				else
 					*textprompts[num]->page[pagenum].name = '\0';
@@ -3794,7 +3794,7 @@ void readmaincfg(MYFILE *f)
 			}
 			else if (fastcmp(word, "TITLEPICSNAME"))
 			{
-				strncpy(ttname, word2, 9);
+				strncpy(ttname, word2, sizeof(ttname)-1);
 				titlechanged = true;
 			}
 			else if (fastcmp(word, "TITLEPICSX"))
@@ -3878,8 +3878,12 @@ void readmaincfg(MYFILE *f)
 				savemoddata = true;
 
 				// Also save a time attack folder
-				filenamelen = strlen(gamedatafilename)-4;  // Strip off the extension
-				strncpy(timeattackfolder, gamedatafilename, min(filenamelen, sizeof (timeattackfolder)));
+				filenamelen = strlen(gamedatafilename);  // Strip off the extension
+				if (filenamelen >= 4)
+					filenamelen -= 4;
+				if (filenamelen >= sizeof(timeattackfolder))
+					filenamelen = sizeof(timeattackfolder)-1;
+				strncpy(timeattackfolder, gamedatafilename, filenamelen);
 				timeattackfolder[min(filenamelen, sizeof (timeattackfolder) - 1)] = '\0';
 
 				strcpy(savegamename, timeattackfolder);

src/doomstat.h

@@ -165,7 +165,7 @@ extern boolean exitfadestarted;
 typedef struct
 {
 	UINT8 numpics;
-	char picname[8][8];
+	char picname[8][8+1];
 	UINT8 pichires[8];
 	char *text;
 	UINT16 xcoord[8];
@@ -296,17 +296,17 @@ typedef struct
 typedef struct
 {
 	// The original eight, plus one.
-	char lvlttl[22];       ///< Level name without "Zone". (21 character limit instead of 32, 21 characters can display on screen max anyway)
-	char subttl[33];       ///< Subtitle for level
+	char lvlttl[21+1];          ///< Level name without "Zone". (21 character limit instead of 32, 21 characters can display on screen max anyway)
+	char subttl[32+1];          ///< Subtitle for level
 	UINT8 actnum;               ///< Act number or 0 for none.
 	UINT32 typeoflevel;         ///< Combination of typeoflevel flags.
 	INT16 nextlevel;            ///< Map number of next level, or 1100-1102 to end.
 	INT16 marathonnext;         ///< See nextlevel, but for Marathon mode. Necessary to support hub worlds ala SUGOI.
-	char keywords[33];     ///< Keywords separated by space to search for. 32 characters.
+	char keywords[32+1];        ///< Keywords separated by space to search for. 32 characters.
 	char musname[7];            ///< Music track to play. "" for no music.
 	UINT16 mustrack;            ///< Subsong to play. Only really relevant for music modules and specific formats supported by GME. 0 to ignore.
 	UINT32 muspos;              ///< Music position to jump to.
-	char forcecharacter[17];  ///< (SKINNAMESIZE+1) Skin to switch to or "" to disable.
+	char forcecharacter[16+1];  ///< (SKINNAMESIZE+1) Skin to switch to or "" to disable.
 	UINT8 weather;              ///< 0 = sunny day, 1 = storm, 2 = snow, 3 = rain, 4 = blank, 5 = thunder w/o rain, 6 = rain w/o lightning, 7 = heat wave.
 	INT16 skynum;               ///< Sky number to use.
 	INT16 skybox_scalex;        ///< Skybox X axis scale. (0 = no movement, 1 = 1:1 movement, 16 = 16:1 slow movement, -4 = 1:4 fast movement, etc.)
@@ -314,9 +314,9 @@ typedef struct
 	INT16 skybox_scalez;        ///< Skybox Z axis scale.
 
 	// Extra information.
-	char interscreen[8];  ///< 320x200 patch to display at intermission.
-	char runsoc[33];      ///< SOC to execute at start of level (32 character limit instead of 63)
-	char scriptname[33];  ///< Script to use when the map is switched to. (32 character limit instead of 191)
+	char interscreen[8+1];      ///< 320x200 patch to display at intermission.
+	char runsoc[32+1];          ///< SOC to execute at start of level (32 character limit instead of 63)
+	char scriptname[32+1];      ///< Script to use when the map is switched to. (32 character limit instead of 191)
 	UINT8 precutscenenum;       ///< Cutscene number to play BEFORE a level starts.
 	UINT8 cutscenenum;          ///< Cutscene number to use, 0 for none.
 	INT16 countdown;            ///< Countdown until level end?
@@ -337,9 +337,9 @@ typedef struct
 	fixed_t gravity;            ///< Map-wide gravity.
 
 	// Title card.
-	char ltzzpatch[9];      ///< Zig zag patch.
-	char ltzztext[9];       ///< Zig zag text.
-	char ltactdiamond[9];   ///< Act diamond.
+	char ltzzpatch[8+1];        ///< Zig zag patch.
+	char ltzztext[8+1];         ///< Zig zag text.
+	char ltactdiamond[8+1];     ///< Act diamond.
 
 	// Freed animals stuff.
 	UINT8 numFlickies;          ///< Internal. For freed flicky support.

src/f_finale.h

@@ -96,7 +96,7 @@ typedef enum
 extern ttmode_enum ttmode;
 extern UINT8 ttscale;
 // ttmode user vars
-extern char ttname[9];
+extern char ttname[8+1];
 extern INT16 ttx;
 extern INT16 tty;
 extern INT16 ttloop;

src/hu_stuff.c

@@ -496,10 +496,10 @@ static void DoSayCommand(SINT8 target, size_t usedargs, UINT8 flags)
 		// what we're gonna do now is check if the player exists
 		// with that logic, characters 4 and 5 are our numbers:
 		const char *newmsg;
-		char playernum[3];
+		char playernum[3+1];
 		INT32 spc = 1; // used if playernum[1] is a space.
 
-		strncpy(playernum, msg+3, 3);
+		strncpy(playernum, msg+3, sizeof(playernum)-1);
 		// check for undesirable characters in our "number"
 		if (((playernum[0] < '0') || (playernum[0] > '9')) || ((playernum[1] < '0') || (playernum[1] > '9')))
 		{
@@ -969,7 +969,7 @@ static void HU_sendChatMessage(void)
 	if (strlen(msg) > 4 && strnicmp(msg, "/pm", 3) == 0) // used /pm
 	{
 		INT32 spc = 1; // used if playernum[1] is a space.
-		char playernum[3];
+		char playernum[3+1];
 		const char *newmsg;
 
 		// what we're gonna do now is check if the player exists
@@ -982,7 +982,7 @@ static void HU_sendChatMessage(void)
 			return;
 		}
 
-		strncpy(playernum, msg+3, 3);
+		strncpy(playernum, msg+3, sizeof(playernum)-1);
 		// check for undesirable characters in our "number"
 		if (!(isdigit(playernum[0]) && isdigit(playernum[1])))
 		{
@@ -1679,13 +1679,14 @@ static void HU_DrawChat(void)
 			// filter: (code needs optimization pls help I'm bad with C)
 			if (w_chat[3])
 			{
-				char playernum[3];
+				char playernum[3+1];
 				UINT32 n;
 				// right, that's half important: (w_chat[4] may be a space since /pm0 msg is perfectly acceptable!)
 				if ( ( ((w_chat[3] != 0) && ((w_chat[3] < '0') || (w_chat[3] > '9'))) || ((w_chat[4] != 0) && (((w_chat[4] < '0') || (w_chat[4] > '9'))))) && (w_chat[4] != ' '))
 					break;
 
-				strncpy(playernum, w_chat+3, 3);
+				strncpy(playernum, w_chat+3, sizeof(playernum)-1);
+				playernum[3] = 0;
 				n = atoi(playernum); // turn that into a number
 				// special cases:
 
@@ -3052,7 +3053,7 @@ void HU_DoCEcho(const char *msg)
 {
 	I_OutputMsg("%s\n", msg); // print to log
 
-	strncpy(cechotext, msg, sizeof(cechotext));
+	strncpy(cechotext, msg, sizeof(cechotext)-1);
 	strncat(cechotext, "\\", sizeof(cechotext) - strlen(cechotext) - 1);
 	cechotext[sizeof(cechotext) - 1] = '\0';
 	cechotimer = cechoduration;

src/m_menu.c

@@ -2692,7 +2692,7 @@ static boolean MIT_SetCurTitlePics(UINT32 menutype, INT32 level, INT32 *retval,
 			curhidepics = menupres[menutype].hidetitlepics;
 			curttmode = menupres[menutype].ttmode;
 			curttscale = (menupres[menutype].ttscale != UINT8_MAX ? menupres[menutype].ttscale : ttscale);
-			strncpy(curttname, menupres[menutype].ttname, 9);
+			strncpy(curttname, menupres[menutype].ttname, sizeof(curttname)-1);
 			curttx = (menupres[menutype].ttx != INT16_MAX ? menupres[menutype].ttx : ttx);
 			curtty = (menupres[menutype].tty != INT16_MAX ? menupres[menutype].tty : tty);
 			curttloop = (menupres[menutype].ttloop != INT16_MAX ? menupres[menutype].ttloop : ttloop);
@@ -11282,6 +11282,7 @@ static void M_DrawRoomMenu(void)
 			if (dot_frame < 0)
 				dot_frame = 0;
 
+			if (dot_frame != 3)
 				strncpy(&text[dot_frame], "...", min(dots, 3 - dot_frame));
 		}
 

src/m_menu.h

@@ -378,7 +378,7 @@ typedef struct
 	char displayname[SKINNAMESIZE+1];
 	INT16 skinnum[2];
 	UINT16 oppositecolor;
-	char nametag[8];
+	char nametag[8+1];
 	patch_t *namepic;
 	UINT16 tagtextcolor;
 	UINT16 tagoutlinecolor;

src/netcode/client_connection.c

@@ -307,7 +307,7 @@ boolean CL_SendJoin(void)
 	else
 		player2name = cv_playername2.zstring;
 
-	strncpy(netbuffer->u.clientcfg.names[0], cv_playername.zstring, MAXPLAYERNAME);
+	strncpy(netbuffer->u.clientcfg.names[0], cv_playername.zstring, sizeof(netbuffer->u.clientcfg.names[0])-1);
 	strncpy(netbuffer->u.clientcfg.names[1], player2name, MAXPLAYERNAME);
 
 	return HSendPacket(servernode, true, 0, sizeof (clientconfig_pak));

src/netcode/server_connection.c

@@ -115,12 +115,12 @@ static void SV_SendServerInfo(INT32 node, tic_t servertime)
 	netbuffer->u.serverinfo.refusereason = GetRefuseReason(node);
 
 	strncpy(netbuffer->u.serverinfo.gametypename, Gametype_Names[gametype],
-			sizeof netbuffer->u.serverinfo.gametypename);
+			sizeof(netbuffer->u.serverinfo.gametypename)-1);
 	netbuffer->u.serverinfo.modifiedgame = (UINT8)modifiedgame;
 	netbuffer->u.serverinfo.cheatsenabled = CV_CheatsEnabled();
 	netbuffer->u.serverinfo.flags = (dedicated ? SV_DEDICATED : 0);
 	strncpy(netbuffer->u.serverinfo.servername, cv_servername.string,
-		MAXSERVERNAME);
+		sizeof(netbuffer->u.serverinfo.servername)-1);
 	strncpy(netbuffer->u.serverinfo.mapname, G_BuildMapName(gamemap), 7);
 
 	M_Memcpy(netbuffer->u.serverinfo.mapmd5, mapmd5, 16);
@@ -184,7 +184,9 @@ static void SV_SendPlayerInfo(INT32 node)
 		}
 
 		netbuffer->u.playerinfo[i].num = i;
-		strncpy(netbuffer->u.playerinfo[i].name, (const char *)&player_names[i], MAXPLAYERNAME+1);
+		memset(netbuffer->u.playerinfo[i].name, 0x00, sizeof(netbuffer->u.playerinfo[i].name));
+		memcpy(netbuffer->u.playerinfo[i].name, player_names[i], sizeof(player_names[i]));
+
 		netbuffer->u.playerinfo[i].name[MAXPLAYERNAME] = '\0';
 
 		//fetch IP address

src/p_spec.c

@@ -363,7 +363,7 @@ void P_ParseAnimationDefintion(SINT8 istexture)
 		// Increase the size to make room for the new animation definition
 		maxanims++;
 		animdefs = (animdef_t *)Z_Realloc(animdefs, sizeof(animdef_t)*(maxanims + 1), PU_STATIC, NULL);
-		strncpy(animdefs[i].startname, animdefsToken, 9);
+		strncpy(animdefs[i].startname, animdefsToken, sizeof(animdefs[i].startname)-1);
 	}
 
 	// animdefs[i].startname is now set to animdefsToken either way.

src/s_sound.c

@@ -1910,7 +1910,7 @@ static void S_AddMusicStackEntry(const char *mname, UINT16 mflags, boolean loopi
 	if (!music_stacks)
 	{
 		music_stacks = Z_Calloc(sizeof (*mst), PU_MUSIC, NULL);
-		strncpy(music_stacks->musname, (status == JT_MASTER ? mname : (S_CheckQueue() ? queue_name : mapmusname)), 7);
+		strncpy(music_stacks->musname, (status == JT_MASTER ? mname : (S_CheckQueue() ? queue_name : mapmusname)), sizeof(music_stacks->musname)-1);
 		music_stacks->musflags = (status == JT_MASTER ? mflags : (S_CheckQueue() ? queue_flags : mapmusflags));
 		music_stacks->looping = (status == JT_MASTER ? looping : (S_CheckQueue() ? queue_looping : true));
 		music_stacks->position = (status == JT_MASTER ? position : (S_CheckQueue() ? queue_position : S_GetMusicPosition()));
@@ -2033,7 +2033,7 @@ boolean S_RecallMusic(UINT16 status, boolean fromfirst)
 	if (result)
 	{
 		*entry = *result;
-		strncpy(entry->musname, result->musname, 7);
+		memcpy(entry->musname, result->musname, sizeof(entry->musname));
 	}
 
 	// no result, just grab mapmusname
@@ -2255,7 +2255,7 @@ void S_ChangeMusicEx(const char *mmusic, UINT16 mflags, boolean looping, UINT32
 	if (S_MusicDisabled())
 		return;
 
-	strncpy(newmusic, mmusic, 7);
+	strncpy(newmusic, mmusic, sizeof(newmusic)-1);
 	if (LUA_HookMusicChange(music_name, &hook_param))
 		return;
 	newmusic[6] = 0;

src/s_sound.h

@@ -238,7 +238,7 @@ UINT32 S_GetMusicPosition(void);
 
 typedef struct musicstack_s
 {
-	char musname[7];
+	char musname[7+1];
 	UINT16 musflags;
 	boolean looping;
 	UINT32 position;

src/sdl/i_system.c

@@ -1700,7 +1700,7 @@ const char *I_GetJoyName(INT32 joyindex)
 	{
 		tempname = SDL_JoystickNameForIndex(joyindex);
 		if (tempname)
-			strncpy(joyname, tempname, 255);
+			strncpy(joyname, tempname, sizeof(joyname)-1);
 	}
 	return joyname;
 }

src/v_video.c

@@ -384,13 +384,14 @@ void V_CubeApply(UINT8 *red, UINT8 *green, UINT8 *blue)
 
 const char *R_GetPalname(UINT16 num)
 {
-	static char palname[9];
-	char newpal[9] = "PLAYPAL";
+	static char palname[8+1];
+	char newpal[9] = "PLAYPAL\0";
 
 	if (num > 0 && num <= 10000)
 		snprintf(newpal, 8, "PAL%04u", num-1);
 
-	strncpy(palname, newpal, 8);
+	strncpy(palname, newpal, sizeof(palname)-1);
+	palname[8] = 0;
 	return palname;
 }