diff mbox series

[7/7] lib: remove random.c

Message ID 20250310182954.1396724-8-sandeen@redhat.com (mailing list archive)
State New
Headers show
Series fstests: enable sparse checking & fix fallout | expand

Commit Message

Eric Sandeen March 10, 2025, 6:29 p.m. UTC 
sparse points out that lots of things in random.c could be static,
and upon doing so we realize that nothing in this file is used.
Which is unsurprising since these are all part of the standard
C library ... so just remove the file.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 lib/Makefile |   5 +-
 lib/random.c | 224 ---------------------------------------------------
 2 files changed, 2 insertions(+), 227 deletions(-)
 delete mode 100644 lib/random.c
diff mbox series

Patch

diff --git a/lib/Makefile b/lib/Makefile
index 53540ca7..ce4381a2 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -11,13 +11,12 @@  LT_REVISION = 0
 LT_AGE = 0
 
 #
-# Everything (except for random.c) copied directly from LTP.
+# Everything copied directly from LTP.
 # Refer to http://ltp.sourceforge.net/ for complete source.
 #
 CFILES = dataascii.c databin.c datapid.c file_lock.c forker.c \
 	pattern.c open_flags.c random_range.c string_to_tokens.c \
-	str_to_bytes.c tlibio.c write_log.c \
-	random.c
+	str_to_bytes.c tlibio.c write_log.c
 
 default: depend $(LTLIBRARY)
 
diff --git a/lib/random.c b/lib/random.c
deleted file mode 100644
index d5c81be8..00000000
--- a/lib/random.c
+++ /dev/null
@@ -1,224 +0,0 @@ 
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * random.c -- pseudo random number generator
- * Copyright (C) 1994  Chris Wallace (csw@bruce.cs.monash.edu.au)
- */
-
-#include <sys/types.h>
-
-/*
- * modified by dxm@sgi.com so that this file acts as a drop in replacement
- * for srandom and random.
- */
-
-/*
- *	A random number generator called as a function by
- *	random (iseed)	or	irandm (iseed)
- *	The parameter should be a pointer to a 2-element int32_t vector.
- *	The first function returns a double uniform in 0 .. 1.
- *	The second returns a int32_t integer uniform in 0 .. 2**31-1
- *	Both update iseed[] in exactly the same way.
- *	iseed[] must be a 2-element integer vector.
- *	The initial value of the second element may be anything.
- *
- *	The period of the random sequence is 2**32 * (2**32-1)
- *	The table mt[0:127] is defined by mt[i] = 69069 ** (128-i)
- */
-
-#define MASK ((int32_t) 593970775)
-/*	or in hex, 23674657	*/
-
-#define SCALE ((double) 1.0 / (1024.0 * 1024.0 * 1024.0 * 2.0))
-/*	i.e. 2 to power -31	*/
-
-static int32_t mt [128] =   {
-      902906369,
-     2030498053,
-     -473499623,
-     1640834941,
-      723406961,
-     1993558325,
-     -257162999,
-    -1627724755,
-      913952737,
-      278845029,
-     1327502073,
-    -1261253155,
-      981676113,
-    -1785280363,
-     1700077033,
-      366908557,
-    -1514479167,
-     -682799163,
-      141955545,
-     -830150595,
-      317871153,
-     1542036469,
-     -946413879,
-    -1950779155,
-      985397153,
-      626515237,
-      530871481,
-      783087261,
-    -1512358895,
-     1031357269,
-    -2007710807,
-    -1652747955,
-    -1867214463,
-      928251525,
-     1243003801,
-    -2132510467,
-     1874683889,
-     -717013323,
-      218254473,
-    -1628774995,
-    -2064896159,
-       69678053,
-      281568889,
-    -2104168611,
-     -165128239,
-     1536495125,
-      -39650967,
-      546594317,
-     -725987007,
-     1392966981,
-     1044706649,
-      687331773,
-    -2051306575,
-     1544302965,
-     -758494647,
-    -1243934099,
-      -75073759,
-      293132965,
-    -1935153095,
-      118929437,
-      807830417,
-    -1416222507,
-    -1550074071,
-      -84903219,
-     1355292929,
-     -380482555,
-    -1818444007,
-     -204797315,
-      170442609,
-    -1636797387,
-      868931593,
-     -623503571,
-     1711722209,
-      381210981,
-     -161547783,
-     -272740131,
-    -1450066095,
-     2116588437,
-     1100682473,
-      358442893,
-    -1529216831,
-     2116152005,
-     -776333095,
-     1265240893,
-     -482278607,
-     1067190005,
-      333444553,
-       86502381,
-      753481377,
-       39000101,
-     1779014585,
-      219658653,
-     -920253679,
-     2029538901,
-     1207761577,
-    -1515772851,
-     -236195711,
-      442620293,
-      423166617,
-    -1763648515,
-     -398436623,
-    -1749358155,
-     -538598519,
-     -652439379,
-      430550625,
-    -1481396507,
-     2093206905,
-    -1934691747,
-     -962631983,
-     1454463253,
-    -1877118871,
-     -291917555,
-    -1711673279,
-      201201733,
-     -474645415,
-      -96764739,
-    -1587365199,
-     1945705589,
-     1303896393,
-     1744831853,
-      381957665,
-     2135332261,
-      -55996615,
-    -1190135011,
-     1790562961,
-    -1493191723,
-      475559465,
-          69069
-		};
-
-double 
-_random (int32_t is [2])
-{
-	int32_t it, leh, nit;
-
-	it = is [0];
-	leh = is [1];
-	if (it <= 0)	
-		it = (it + it) ^ MASK;
-	else
-		it = it + it;
-	nit = it - 1;
-/*	to ensure all-ones pattern omitted    */
-	leh = leh * mt[nit & 127] + nit;
-	is [0] = it;    is [1] = leh;
-	if (leh < 0) leh = ~leh;
-	return (SCALE * ((int32_t) (leh | 1)));
-}
-
-
-
-int32_t 
-_irandm (int32_t is [2])
-{
-	int32_t it, leh, nit;
-
-	it = is [0];
-	leh = is [1];
-	if (it <= 0)	
-		it = (it + it) ^ MASK;
-	else
-		it = it + it;
-	nit = it - 1;
-/*	to ensure all-ones pattern omitted    */
-	leh = leh * mt[nit & 127] + nit;
-	is [0] = it;    is [1] = leh;
-	if (leh < 0) leh = ~leh;
-	return (leh);
-}
-
-/*
- * make this a drop in replacement for random and srandom
- *
- * XXX not thread safe I guess.
- */
-
-static int32_t saved_seed[2];
-
-long random(void)
-{
-    return _irandm(saved_seed);
-}
-
-void srandom(unsigned seed)
-{
-    saved_seed[0]=seed;
-    saved_seed[1]=0;
-    _irandm(saved_seed);
-}
-