fix many crashes when out of memory

src/interface.c

@@ -2279,6 +2279,8 @@ void menu_ui(pixel *vid_buf, int i, int *sl, int *sr)
 {
 	int b=1,bq,mx,my,h,x,y,n=0,height,width,sy,rows=0;
 	pixel *old_vid=(pixel *)calloc((XRES+BARSIZE)*(YRES+MENUSIZE), PIXELSIZE);
+	if (!old_vid)
+		return;
 	fillrect(vid_buf, -1, -1, XRES+1, YRES+MENUSIZE, 0, 0, 0, 192);
 	memcpy(old_vid, vid_buf, ((XRES+BARSIZE)*(YRES+MENUSIZE))*PIXELSIZE);
 
@@ -3306,6 +3308,8 @@ int search_ui(pixel *vid_buf)
 	void *thumb, *data;
 	int thlen, dlen;
 
+	if (!v_buf)
+		return 0;
 	memset(v_buf, 0, ((YRES+MENUSIZE)*(XRES+BARSIZE))*PIXELSIZE);
 
 	memset(img_http, 0, sizeof(img_http));
@@ -4102,6 +4106,8 @@ int open_ui(pixel *vid_buf, char *save_id, char *save_date)
 	ui_copytext ctb;
 
 	pixel *old_vid=(pixel *)calloc((XRES+BARSIZE)*(YRES+MENUSIZE), PIXELSIZE);
+	if (!old_vid || !info)
+		return 0;
 	fillrect(vid_buf, -1, -1, XRES+BARSIZE, YRES+MENUSIZE, 0, 0, 0, 192);
 	viewcountbuffer[0] = 0;
 
@@ -5448,6 +5454,8 @@ char *console_ui(pixel *vid_buf,char error[255],char console_more) {
 	ed.multiline = 0;
 	ed.cursor = 0;
 	//fillrect(vid_buf, -1, -1, XRES, 220, 0, 0, 0, 190);
+	if (!old_buf)
+		return NULL;
 	memcpy(old_buf,vid_buf,(XRES+BARSIZE)*YRES*PIXELSIZE);
 
 	fillrect(old_buf, -1, -1, XRES+BARSIZE, 220, 0, 0, 0, 190);
@@ -5663,6 +5671,8 @@ unsigned int decorations_ui(pixel *vid_buf,int *bsx,int *bsy, unsigned int saved
 	box_B.cursor = 0;
 
 
+	if (!old_buf)
+		return PIXRGB(currR,currG,currB);
 	memcpy(old_buf,vid_buf,(XRES+BARSIZE)*YRES*PIXELSIZE);
 	while (!sdl_poll())
 	{
@@ -6423,6 +6433,8 @@ void catalogue_ui(pixel * vid_buf)
 	ui_edit ed;
 	
 	vid_buf2 = calloc((XRES+BARSIZE)*(YRES+MENUSIZE), PIXELSIZE);
+	if (!vid_buf2)
+		return;
 	
 	ed.w = xsize-16-4;
 	ed.x = x0+11;
@@ -6811,6 +6823,8 @@ void render_ui(pixel * vid_buf, int xcoord, int ycoord, int orientation)
 	part_vbuf = calloc((XRES+BARSIZE)*(YRES+MENUSIZE), PIXELSIZE); //Extra video buffer
 	part_vbuf_store = part_vbuf;
 	
+	if (!o_vid_buf || !part_vbuf || !part_vbuf_store)
+		return;
 	while (!sdl_poll())
 	{
 		b = mouse_get_state(&mx, &my);

src/main.c

@@ -1648,7 +1648,7 @@ int main(int argc, char *argv[])
 				dump_frame(vid_buf, XRES, YRES, XRES+BARSIZE);
 			if (sdl_key=='v'&&(sdl_mod & (KMOD_LCTRL|KMOD_RCTRL)))
 			{
-				if (clipboard_ready==1)
+				if (clipboard_ready==1 && clipboard_data)
 				{
 					load_data = malloc(clipboard_length);
 					memcpy(load_data, clipboard_data, clipboard_length);
@@ -2185,17 +2185,21 @@ int main(int argc, char *argv[])
 				if (copy_mode==1)//CTRL-C, copy
 				{
 					clipboard_data=build_save(&clipboard_length, save_x, save_y, save_w, save_h, bmap, vx, vy, pv, fvx, fvy, signs, parts);
-					clipboard_ready = 1;
+					if (clipboard_data)
+						clipboard_ready = 1;
 					save_mode = 0;
 					copy_mode = 0;
 				}
 				else if (copy_mode==2)//CTRL-X, cut
 				{
 					clipboard_data=build_save(&clipboard_length, save_x, save_y, save_w, save_h, bmap, vx, vy, pv, fvx, fvy, signs, parts);
-					clipboard_ready = 1;
+					if (clipboard_data)
+					{
+						clipboard_ready = 1;
+						clear_area(save_x, save_y, save_w, save_h);
+					}
 					save_mode = 0;
 					copy_mode = 0;
-					clear_area(save_x, save_y, save_w, save_h);
 				}
 				else//normal save
 				{

src/save.c

@@ -494,6 +494,12 @@ void *build_save_OPS(int *size, int orig_x0, int orig_y0, int orig_w, int orig_h
 	wallDataLen = blockW*blockH;
 	fanData = malloc((blockW*blockH)*2);
 	fanDataLen = 0;
+	if (!wallData || !fanData)
+	{
+		puts("Save Error, out of memory\n");
+		outputData = NULL;
+		goto fin;
+	}
 	for(x = blockX; x < blockX+blockW; x++)
 	{
 		for(y = blockY; y < blockY+blockH; y++)
@@ -534,6 +540,12 @@ void *build_save_OPS(int *size, int orig_x0, int orig_y0, int orig_w, int orig_h
 	partsPosLastMap = calloc(fullW*fullH, sizeof(unsigned));
 	partsPosCount = calloc(fullW*fullH, sizeof(unsigned));
 	partsPosLink = calloc(NPART, sizeof(unsigned));
+	if (!partsPosFirstMap || !partsPosLastMap || !partsPosCount || !partsPosLink)
+	{
+		puts("Save Error, out of memory\n");
+		outputData = NULL;
+		goto fin;
+	}
 	for(i = 0; i < NPART; i++)
 	{
 		if(partsptr[i].type)
@@ -565,6 +577,12 @@ void *build_save_OPS(int *size, int orig_x0, int orig_y0, int orig_w, int orig_h
 	//Store number of particles in each position
 	partsPosData = malloc(fullW*fullH*3);
 	partsPosDataLen = 0;
+	if (!partsPosData)
+	{
+		puts("Save Error, out of memory\n");
+		outputData = NULL;
+		goto fin;
+	}
 	for (y=0;y<fullH;y++)
 	{
 		for (x=0;x<fullW;x++)
@@ -586,6 +604,12 @@ void *build_save_OPS(int *size, int orig_x0, int orig_y0, int orig_w, int orig_h
 	partsDataLen = 0;
 	partsSaveIndex = calloc(NPART, sizeof(unsigned));
 	partsCount = 0;
+	if (!partsData || !partsSaveIndex)
+	{
+		puts("Save Error, out of memory\n");
+		outputData = NULL;
+		goto fin;
+	}
 	for (y=0;y<fullH;y++)
 	{
 		for (x=0;x<fullW;x++)
@@ -726,6 +750,12 @@ void *build_save_OPS(int *size, int orig_x0, int orig_y0, int orig_w, int orig_h
 
 	soapLinkData = malloc(3*elementCount[PT_SOAP]);
 	soapLinkDataLen = 0;
+	if (!soapLinkData)
+	{
+		puts("Save Error, out of memory\n");
+		outputData = NULL;
+		goto fin;
+	}
 	//Iterate through particles in the same order that they were saved
 	for (y=0;y<fullH;y++)
 	{
@@ -822,7 +852,13 @@ void *build_save_OPS(int *size, int orig_x0, int orig_y0, int orig_w, int orig_h
 	finalData = bson_data(&b);
 	finalDataLen = bson_size(&b);
 	outputDataLen = finalDataLen*2+12;
-	outputData = malloc(outputDataLen);
+	outputData = (unsigned char*)malloc(outputDataLen);
+	if (!outputData)
+	{
+		puts("Save Error, out of memory\n");
+		outputData = NULL;
+		goto fin;
+	}
 
 	outputData[0] = 'O';
 	outputData[1] = 'P';