more initialization stuff out of main(), remove weird coincidentally successful one_g variable

main.c

@@ -629,27 +629,7 @@ int main(int argc, char *argv[])
 			}
 		}
 
-		/* Use less ram when using STDOUT to store the temporary output
-		 * file. */
-		if (STDOUT && ((STDIN && DECOMPRESS) || !(DECOMPRESS || TEST_ONLY)))
-			control->maxram = control->ramsize * 2 / 9;
-		else
-			control->maxram = control->ramsize / 3;
-		if (BITS32) {
-			/* Decrease usable ram size on 32 bits due to kernel /
-			 * userspace split. Cannot allocate larger than a 1
-			 * gigabyte chunk due to 32 bit signed long being
-			 * used in alloc, and at most 3GB can be malloced, and
-			 * 2/3 of that makes for a total of 2GB to be split
-			 * into thirds.
-			 */
-			control->usable_ram = MAX(control->ramsize - 900000000ll, 900000000ll);
-			control->maxram = MIN(control->maxram, control->usable_ram);
-			control->maxram = MIN(control->maxram, one_g * 2 / 3);
-		} else
-			control->usable_ram = control->maxram;
-		round_to_page(&control->maxram);
-
+		setup_ram(control);
 		show_summary();
 
 		gettimeofday(&start_time, NULL);