97 	FILE *in;  in main()  local
139 		in = fopen(infile, "rb");  in main()
140 		if (in == NULL) {  in main()
146 		in = stdin;  in main()
152 	if (fgetc(in) != 'P')  in main()
154 	switch (fgetc(in)) {  in main()
179 		if (feof(in))  in main()
181 		c = fgetc(in);  in main()
189 			    c = fgetc(in);  in main()
190 			} while(!(strchr("\r\n", c) || feof(in)));  in main()
194 		ungetc(c, in);  in main()
199 		if (fscanf(in, " %u %u", &w, &h) != 2)  in main()
201 		if (fgetc(in) != '\n')  in main()
205 		if (fscanf(in, " %u %u %u", &w, &h, &prec) != 3)  in main()
207 		if (fgetc(in) != '\n' || prec != 255)  in main()
279 		if (fread(buf, linebytes, 1, in) != 1) {  in main()