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

lrzip_private.h

@@ -177,6 +177,8 @@ typedef struct md5_ctx md5_ctx;
 #define SALT_LEN 8
 #define CBC_LEN 16
 
+#define one_g (1000 * 1024 * 1024)
+
 #if defined(NOTHREAD) || !defined(_SC_NPROCESSORS_ONLN)
 # define PROCESSORS (1)
 #else

main.c

@@ -629,27 +629,7 @@ int main(int argc, char *argv[])
 			}
 		}
 
-		/* Use less ram when using STDOUT to store the temporary output
+		setup_ram(control);
-		 * 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);
-
 		show_summary();
 
 		gettimeofday(&start_time, NULL);

stream.c

@@ -662,8 +662,6 @@ out:
 
 /* WORK FUNCTIONS */
 
-i64 one_g = 1000 * 1024 * 1024;
-
 /* Look at whether we're writing to a ram location or physical files and write
  * the data accordingly. */
 ssize_t put_fdout(rzip_control *control, void *offset_buf, ssize_t ret)

stream.h

@@ -38,6 +38,5 @@ i64 read_stream(rzip_control *control, void *ss, int streamno, uchar *p, i64 len
 int close_stream_out(rzip_control *control, void *ss);
 int close_stream_in(void *ss);
 ssize_t put_fdout(rzip_control *control, void *offset_buf, ssize_t ret);
-i64 one_g;
 
 #endif

util.c

@@ -133,6 +133,29 @@ void failure(const char *format, ...)
 	fatal_exit();
 }
 
+void setup_ram(rzip_control *control)
+{
+	/* 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);
+}
+
 void round_to_page(i64 *size)
 {
 	*size -= *size % PAGE_SIZE;

util.h

@@ -27,6 +27,7 @@ void unlink_files(void);
 void register_outputfile(FILE *f);
 void fatal(const char *format, ...);
 void failure(const char *format, ...);
+void setup_ram(rzip_control *control);
 void round_to_page(i64 *size);
 void get_rand(uchar *buf, int len);
 void lrz_stretch(rzip_control *control);