diff --git a/src/header/stdlib/mod.rs b/src/header/stdlib/mod.rs
index 22cdb5a11765d94a26d256532a2523d88ed9decb..86892cb97c19bcb7fdc5868a20f01fad1ad3ff7a 100644
--- a/src/header/stdlib/mod.rs
+++ b/src/header/stdlib/mod.rs
@@ -25,6 +25,7 @@ use crate::{
};
mod lcg48;
+mod random;
mod sort;
pub const EXIT_FAILURE: c_int = 1;
@@ -369,9 +370,31 @@ pub extern "C" fn grantpt(fildes: c_int) -> c_int {
unimplemented!();
}
-// #[no_mangle]
-pub extern "C" fn initstate(seec: c_uint, state: *mut c_char, size: size_t) -> *mut c_char {
- unimplemented!();
+#[no_mangle]
+pub unsafe extern "C" fn initstate(seed: c_uint, state: *mut c_char, size: size_t) -> *mut c_char {
+ // Ported from musl
+
+ if size < 8 {
+ ptr::null_mut()
+ } else {
+ // TODO: lock?
+ let old_state = random::save_state();
+ random::N = match size {
+ 0..=7 => unreachable!(), // ensured above
+ 8..=31 => 0,
+ 32..=63 => 7,
+ 64..=127 => 15,
+ 128..=255 => 31,
+ _ => 63,
+ };
+
+ random::X_PTR = (state as *mut u32).offset(1);
+ random::seed(seed);
+ random::save_state();
+ // TODO: unlock?
+
+ old_state as _
+ }
}
#[no_mangle]
@@ -731,9 +754,37 @@ pub unsafe extern "C" fn rand_r(seed: *mut c_uint) -> c_int {
}
}
-// #[no_mangle]
-pub extern "C" fn random() -> c_long {
- unimplemented!();
+#[no_mangle]
+pub unsafe extern "C" fn random() -> c_long {
+ // Ported from musl
+
+ let k: u32;
+ // TODO: lock?
+ random::ensure_x_ptr_init();
+
+ if random::N == 0 {
+ *random::X_PTR = random::lcg31_step(*random::X_PTR);
+ k = *random::X_PTR;
+ } else {
+ *random::X_PTR.add(usize::from(random::I)) += *random::X_PTR.add(usize::from(random::J));
+
+ k = *random::X_PTR.add(usize::from(random::I)) >> 1;
+
+ random::I += 1;
+ if random::I == random::N {
+ random::I = 0;
+ }
+
+ random::J += 1;
+ if random::J == random::N {
+ random::J = 0;
+ }
+ }
+ // TODO: unlock?
+
+ /* Both branches of this function result in a "u31", which will
+ * always fit in a c_long. */
+ c_long::try_from(k).unwrap()
}
#[no_mangle]
@@ -858,9 +909,16 @@ pub extern "C" fn setkey(key: *const c_char) {
unimplemented!();
}
-// #[no_mangle]
-pub extern "C" fn setstate(state: *const c_char) -> *mut c_char {
- unimplemented!();
+#[no_mangle]
+pub unsafe extern "C" fn setstate(state: *mut c_char) -> *mut c_char {
+ /* Ported from musl. The state parameter is no longer const in newer
+ * versions of POSIX. */
+
+ // TODO: lock?
+ let old_state = random::save_state();
+ random::load_state(state as *mut u32);
+ // TODO: unlock?
+ old_state as _
}
#[no_mangle]
@@ -879,9 +937,13 @@ pub unsafe extern "C" fn srand48(seedval: c_long) {
lcg48::DEFAULT_XSUBI = lcg48::ushort_arr3_from_u48(xsubi_value);
}
-// #[no_mangle]
-pub extern "C" fn srandom(seed: c_uint) {
- unimplemented!();
+#[no_mangle]
+pub unsafe extern "C" fn srandom(seed: c_uint) {
+ // Ported from musl
+
+ // TODO: lock?
+ random::seed(seed);
+ // TODO: unlock?
}
#[no_mangle]
diff --git a/src/header/stdlib/random.rs b/src/header/stdlib/random.rs
new file mode 100644
index 0000000000000000000000000000000000000000..b390d5e487b8d3754cc8564ae170e86ce1167067
--- /dev/null
+++ b/src/header/stdlib/random.rs
@@ -0,0 +1,89 @@
+//! Helper functions for random() and friends, see https://pubs.opengroup.org/onlinepubs/7908799/xsh/initstate.html
+/* Ported from musl's implementation (src/prng/random.c). Does not
+ * currently implement locking, though. */
+
+use crate::platform::types::*;
+use core::{convert::TryFrom, ptr};
+
+#[rustfmt::skip]
+static mut X_INIT: [u32; 32] = [
+ 0x00000000, 0x5851f42d, 0xc0b18ccf, 0xcbb5f646,
+ 0xc7033129, 0x30705b04, 0x20fd5db4, 0x9a8b7f78,
+ 0x502959d8, 0xab894868, 0x6c0356a7, 0x88cdb7ff,
+ 0xb477d43f, 0x70a3a52b, 0xa8e4baf1, 0xfd8341fc,
+ 0x8ae16fd9, 0x742d2f7a, 0x0d1f0796, 0x76035e09,
+ 0x40f7702c, 0x6fa72ca5, 0xaaa84157, 0x58a0df74,
+ 0xc74a0364, 0xae533cc4, 0x04185faf, 0x6de3b115,
+ 0x0cab8628, 0xf043bfa4, 0x398150e9, 0x37521657,
+];
+
+/* N needs to accommodate values up to 63, corresponding to the maximum
+ * state array size of 256 bytes. I and J must be able to accommodate
+ * values less than or equal to N. */
+pub static mut N: u8 = 31;
+pub static mut I: u8 = 3;
+pub static mut J: u8 = 0;
+
+/* Unlike in C, we can't take the address of the initializing array
+ * outside of a function. */
+pub static mut X_PTR: *mut u32 = ptr::null_mut();
+
+// To be called in any function that may read from X_PTR
+pub unsafe fn ensure_x_ptr_init() {
+ if X_PTR.is_null() {
+ X_PTR = &mut X_INIT[1];
+ }
+}
+
+pub fn lcg31_step(x: u32) -> u32 {
+ 1103515245_u32.wrapping_mul(x).wrapping_add(12345_u32) & 0x7fffffff
+}
+
+pub fn lcg64_step(x: u64) -> u64 {
+ 6364136223846793005_u64.wrapping_mul(x).wrapping_add(1_u64)
+}
+
+pub unsafe fn save_state() -> *mut u32 {
+ ensure_x_ptr_init();
+ *X_PTR.offset(-1) = (u32::from(N) << 16) | (u32::from(I) << 8) | u32::from(J);
+ X_PTR.offset(-1)
+}
+
+pub unsafe fn load_state(state_ptr: *mut u32) {
+ let prev_x = *state_ptr;
+ X_PTR = state_ptr.offset(1);
+
+ /* This calculation of N does not have a bit mask in the musl
+ * original, in principle resulting in a u16, but obtaining a value
+ * larger than 63 can probably be dismissed as pathological. */
+ N = u8::try_from((prev_x >> 16) & 0xff).unwrap();
+
+ // I and J calculations are straight from musl
+ I = u8::try_from((prev_x >> 8) & 0xff).unwrap();
+ J = u8::try_from(prev_x & 0xff).unwrap();
+}
+
+pub unsafe fn seed(seed: c_uint) {
+ ensure_x_ptr_init();
+
+ let mut s = seed as u64;
+
+ if N == 0 {
+ *X_PTR = s as u32;
+ } else {
+ I = if N == 31 || N == 7 { 3 } else { 1 };
+
+ J = 0;
+
+ for k in 0..usize::from(N) {
+ s = lcg64_step(s);
+
+ // Conversion will always succeed (value is a 32-bit right-
+ // shift of a 64-bit integer).
+ *X_PTR.add(k) = u32::try_from(s >> 32).unwrap();
+ }
+
+ // ensure X contains at least one odd number
+ *X_PTR |= 1;
+ }
+}
diff --git a/tests/Makefile b/tests/Makefile
index 594b17d6d422ec88370babeb16786e6652b4adc7..4efe68130ad690ed53516fbcb14196b3be677146 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -56,6 +56,7 @@ EXPECT_NAMES=\
stdlib/lcg48 \
stdlib/mkostemps \
stdlib/rand \
+ stdlib/random \
stdlib/strtod \
stdlib/strtol \
stdlib/strtoul \
diff --git a/tests/expected/stdlib/random.stderr b/tests/expected/stdlib/random.stderr
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/tests/expected/stdlib/random.stdout b/tests/expected/stdlib/random.stdout
new file mode 100644
index 0000000000000000000000000000000000000000..9a754a9eb6cd5e6ee01d0392925a499cb96e34b0
--- /dev/null
+++ b/tests/expected/stdlib/random.stdout
@@ -0,0 +1,1011 @@
+Uninitialized:
+262836907
+2022765545
+1985587709
+1559253607
+547725525
+1277054513
+317849018
+1695317205
+643446864
+1262735440
+964614733
+622582094
+280266812
+1939173898
+732650777
+1270232897
+336669216
+1669264236
+554325996
+1080138202
+1193538846
+2016671310
+1114491314
+2115358120
+2122955106
+982493572
+450262557
+439534734
+1723376538
+2066693252
+901041
+1986213445
+1941975150
+1986488750
+1397983404
+342217027
+1116059615
+1715832423
+2037534232
+1759506479
+831084215
+854665318
+234604926
+1111351027
+646355568
+967255703
+234100276
+983024785
+489036291
+788426273
+2063162987
+1682575137
+657613935
+1030170653
+1650449610
+633085394
+2012664225
+2100712167
+1072620128
+1588557116
+2019921771
+1073521169
+1427286913
+1814413273
+912526271
+677786670
+9146653
+2028585886
+246135445
+2046680885
+
+Seed 1:
+262836907
+2022765545
+1985587709
+1559253607
+547725525
+1277054513
+317849018
+1695317205
+643446864
+1262735440
+964614733
+622582094
+280266812
+1939173898
+732650777
+1270232897
+336669216
+1669264236
+554325996
+1080138202
+1193538846
+2016671310
+1114491314
+2115358120
+2122955106
+982493572
+450262557
+439534734
+1723376538
+2066693252
+901041
+1986213445
+1941975150
+1986488750
+1397983404
+342217027
+1116059615
+1715832423
+2037534232
+1759506479
+831084215
+854665318
+234604926
+1111351027
+646355568
+967255703
+234100276
+983024785
+489036291
+788426273
+2063162987
+1682575137
+657613935
+1030170653
+1650449610
+633085394
+2012664225
+2100712167
+1072620128
+1588557116
+2019921771
+1073521169
+1427286913
+1814413273
+912526271
+677786670
+9146653
+2028585886
+246135445
+2046680885
+
+Seed 1337:
+1124688561
+1792831582
+1708122057
+1060061055
+2060905921
+703006049
+867046930
+1599327113
+1946461956
+1851068511
+2107308161
+1080994526
+361067458
+2035914970
+1577981791
+72922558
+783590643
+1752267570
+1350489214
+1338091804
+225460930
+62532035
+540341638
+1391100769
+1535109757
+2039272559
+206716062
+1139547941
+462353593
+1176324546
+1766476968
+1587042155
+821672480
+1327115377
+499619562
+735094753
+2030121427
+1366666492
+186938219
+1829099735
+1070251355
+146762732
+762610613
+1431318813
+35194054
+193108756
+1504241371
+818784698
+1945376326
+707246937
+9392854
+23353608
+769778973
+549734493
+1414454377
+157405082
+441523404
+1621170440
+1296953024
+903876997
+650011338
+915946344
+343435504
+1471683818
+95578073
+843055066
+59294924
+2125699500
+62237911
+246233143
+
+Seed 42, size 8:
+1250496027
+1116302264
+1000676753
+1668674806
+908095735
+71666532
+896336333
+1736731266
+1314989459
+1535244752
+391441865
+1108520142
+1206814703
+534045436
+1974836613
+238077914
+1413854219
+705377000
+397905153
+1440974758
+1972995559
+282367380
+881784893
+1823504434
+879663491
+70219520
+1215814457
+1726604670
+318196447
+1939145516
+1030877685
+968547210
+1513076219
+1793402392
+1673312369
+1341335126
+481933015
+1376947140
+1980983981
+529748450
+192473459
+2072944688
+631833769
+202943022
+2012129743
+762679132
+1776566885
+562641722
+542512107
+293225800
+266051553
+1950339334
+562037703
+932343284
+1167153437
+829945746
+711923043
+392328544
+485452313
+748288734
+1303618751
+1013548940
+1115918037
+1967580906
+210226651
+149786744
+1677411153
+1109690294
+2007723191
+1000815652
+
+Seed 42, size 31:
+1250496027
+1116302264
+1000676753
+1668674806
+908095735
+71666532
+896336333
+1736731266
+1314989459
+1535244752
+391441865
+1108520142
+1206814703
+534045436
+1974836613
+238077914
+1413854219
+705377000
+397905153
+1440974758
+1972995559
+282367380
+881784893
+1823504434
+879663491
+70219520
+1215814457
+1726604670
+318196447
+1939145516
+1030877685
+968547210
+1513076219
+1793402392
+1673312369
+1341335126
+481933015
+1376947140
+1980983981
+529748450
+192473459
+2072944688
+631833769
+202943022
+2012129743
+762679132
+1776566885
+562641722
+542512107
+293225800
+266051553
+1950339334
+562037703
+932343284
+1167153437
+829945746
+711923043
+392328544
+485452313
+748288734
+1303618751
+1013548940
+1115918037
+1967580906
+210226651
+149786744
+1677411153
+1109690294
+2007723191
+1000815652
+
+Seed 42, size 32:
+1105844101
+1165395678
+461296413
+1259424640
+70225557
+1467961981
+315013290
+1176069659
+485874011
+776309703
+288010651
+556099569
+96788036
+603023941
+1732169228
+582662048
+1379333644
+2020179879
+1138761617
+1476121681
+475720173
+723447197
+2058783729
+1855053817
+596143428
+1050061698
+1183691850
+1071863601
+1773508895
+1094991931
+779433771
+222168675
+2145053629
+1963125621
+1294032277
+1771078876
+910633905
+2073466048
+1993247552
+908203886
+1889108021
+1139796181
+531799115
+652258278
+1065778581
+377563019
+1560462165
+807402954
+1517359200
+2092261280
+1459661233
+435654133
+322340651
+872639750
+1243057087
+1839699851
+817417382
+555234672
+127870336
+1139758033
+1427874422
+1370927423
+831974236
+97808156
+1926162096
+959844572
+1237566189
+1206552870
+183288347
+2069540425
+
+Seed 42, size 63:
+1105844101
+1165395678
+461296413
+1259424640
+70225557
+1467961981
+315013290
+1176069659
+485874011
+776309703
+288010651
+556099569
+96788036
+603023941
+1732169228
+582662048
+1379333644
+2020179879
+1138761617
+1476121681
+475720173
+723447197
+2058783729
+1855053817
+596143428
+1050061698
+1183691850
+1071863601
+1773508895
+1094991931
+779433771
+222168675
+2145053629
+1963125621
+1294032277
+1771078876
+910633905
+2073466048
+1993247552
+908203886
+1889108021
+1139796181
+531799115
+652258278
+1065778581
+377563019
+1560462165
+807402954
+1517359200
+2092261280
+1459661233
+435654133
+322340651
+872639750
+1243057087
+1839699851
+817417382
+555234672
+127870336
+1139758033
+1427874422
+1370927423
+831974236
+97808156
+1926162096
+959844572
+1237566189
+1206552870
+183288347
+2069540425
+
+Seed 42, size 64:
+2058979096
+1114567745
+1168098319
+1326828429
+585052544
+738633083
+1597984519
+103976400
+637164838
+949355699
+301019638
+1539653489
+829283131
+1994476715
+899306595
+810802043
+1925369788
+945984460
+125329241
+710381785
+1449014869
+899515740
+1003492141
+1640656979
+442529030
+743548669
+135718510
+965001641
+811994708
+1711301303
+374619698
+152505839
+1098490299
+1223819540
+1934201325
+1235732546
+2135248287
+991256780
+484430111
+926959142
+1670507811
+1806226321
+623744314
+1435739022
+999556678
+1374176376
+1526682215
+477688866
+1701508406
+1488226084
+576474982
+564239621
+1555496401
+2039926513
+819402007
+342426170
+1168843
+624913157
+2060652179
+912725209
+139417938
+1666100153
+2143789020
+1697813778
+1038556214
+1615031197
+31787170
+1587283572
+1479726437
+151644796
+
+Seed 42, size 127:
+2058979096
+1114567745
+1168098319
+1326828429
+585052544
+738633083
+1597984519
+103976400
+637164838
+949355699
+301019638
+1539653489
+829283131
+1994476715
+899306595
+810802043
+1925369788
+945984460
+125329241
+710381785
+1449014869
+899515740
+1003492141
+1640656979
+442529030
+743548669
+135718510
+965001641
+811994708
+1711301303
+374619698
+152505839
+1098490299
+1223819540
+1934201325
+1235732546
+2135248287
+991256780
+484430111
+926959142
+1670507811
+1806226321
+623744314
+1435739022
+999556678
+1374176376
+1526682215
+477688866
+1701508406
+1488226084
+576474982
+564239621
+1555496401
+2039926513
+819402007
+342426170
+1168843
+624913157
+2060652179
+912725209
+139417938
+1666100153
+2143789020
+1697813778
+1038556214
+1615031197
+31787170
+1587283572
+1479726437
+151644796
+
+Seed 42, size 128:
+1105844101
+1165395678
+461296413
+1259424640
+2024747114
+1114771942
+1792613078
+189454326
+466435881
+883763281
+1626567616
+1631629466
+1277725798
+1234887654
+657326752
+1836263319
+715263951
+471085233
+2086498417
+1163602145
+1547997976
+1405363974
+632333445
+201224285
+286947872
+1468210882
+103627486
+2147177614
+373040761
+1110293054
+1202766264
+1478884863
+128205084
+1664062677
+590825855
+5468550
+631350971
+235955286
+194922877
+1097786852
+1119718567
+1821490493
+581932670
+249960717
+908894499
+1239259422
+2086224037
+1624158450
+1710344655
+2025238806
+640276948
+1110858983
+1283119132
+1272610393
+1312083268
+1570067004
+593337627
+1415710754
+1569760970
+966378389
+378520161
+625043586
+297779604
+506725245
+141622615
+888605459
+512193796
+772973586
+1124560745
+707116673
+
+Seed 42, size 255:
+1105844101
+1165395678
+461296413
+1259424640
+2024747114
+1114771942
+1792613078
+189454326
+466435881
+883763281
+1626567616
+1631629466
+1277725798
+1234887654
+657326752
+1836263319
+715263951
+471085233
+2086498417
+1163602145
+1547997976
+1405363974
+632333445
+201224285
+286947872
+1468210882
+103627486
+2147177614
+373040761
+1110293054
+1202766264
+1478884863
+128205084
+1664062677
+590825855
+5468550
+631350971
+235955286
+194922877
+1097786852
+1119718567
+1821490493
+581932670
+249960717
+908894499
+1239259422
+2086224037
+1624158450
+1710344655
+2025238806
+640276948
+1110858983
+1283119132
+1272610393
+1312083268
+1570067004
+593337627
+1415710754
+1569760970
+966378389
+378520161
+625043586
+297779604
+506725245
+141622615
+888605459
+512193796
+772973586
+1124560745
+707116673
+
+Seed 42, size 256:
+2058979096
+1114567745
+1168098319
+1326828429
+585052544
+738633083
+1597984519
+103976400
+637164838
+949355699
+301019638
+1539653489
+829283131
+1994476715
+240955585
+1996759270
+1022456556
+1580994077
+1061370374
+875128855
+1125363953
+1573702147
+503131242
+1969480447
+1438211747
+91438056
+1120505602
+1956383039
+1858786240
+1571532334
+1295962411
+342691299
+190922750
+587812343
+1882440834
+1251108553
+1546539316
+237235092
+229958515
+1788514159
+1180131104
+1278005195
+1236529116
+1834489224
+2008240486
+153071308
+1122241977
+1443493489
+827253675
+1844422894
+1615942404
+1444719301
+1322997186
+2068652336
+1108669174
+1117641112
+329168079
+1033958612
+870068653
+1235189147
+1628422544
+186507460
+1238820988
+1150316436
+117400533
+1285498853
+464843634
+1049896178
+1788529262
+1239030133
+
+Seed 42, other state array:
+1105844101
+1165395678
+461296413
+1259424640
+70225557
+1467961981
+315013290
+1176069659
+485874011
+776309703
+288010651
+556099569
+96788036
+603023941
+1732169228
+582662048
+1379333644
+2020179879
+1138761617
+1476121681
+475720173
+723447197
+2058783729
+1855053817
+596143428
+1050061698
+1183691850
+1071863601
+1773508895
+1094991931
+779433771
+222168675
+2145053629
+1963125621
+1294032277
+1771078876
+910633905
+2073466048
+1993247552
+908203886
+1889108021
+1139796181
+531799115
+652258278
+1065778581
+377563019
+1560462165
+807402954
+1517359200
+2092261280
+1459661233
+435654133
+322340651
+872639750
+1243057087
+1839699851
+817417382
+555234672
+127870336
+1139758033
+1427874422
+1370927423
+831974236
+97808156
+1926162096
+959844572
+1237566189
+1206552870
+183288347
+2069540425
+
+State data pointer restored correctly by setstate().
+
+Seed 42, back to first state array:
+1343006534
+1980171372
+782043423
+1083063062
+475232903
+1304516034
+1151509101
+1392464686
+1241740309
+116713217
+1697707295
+611594021
+1486722877
+464603182
+2038305329
+393952924
+215949723
+1654161471
+1745599527
+718621482
+527520873
+238823465
+1810355799
+958834563
+1301525862
+1492448612
+2080260955
+1815218141
+918843046
+317898715
+555133807
+785092322
+426122834
+1606253938
+736775485
+1973304601
+1660310177
+1521067015
+1674138324
+648896653
+2092390142
+772160169
+469099415
+2085041819
+1382277472
+557791010
+478959698
+1587628873
+557786337
+886954417
+1920913029
+643498035
+1878687182
+1359626079
+1546133539
+637470879
+1787787315
+1905187849
+1043203054
+1508046688
+410459218
+51504832
+1290534966
+486057852
+318745576
+1100789000
+36368414
+511601317
+1816117351
+820142804
+
+Pointer returned by initstate with size < 8: (nil)
diff --git a/tests/stdlib/random.c b/tests/stdlib/random.c
new file mode 100644
index 0000000000000000000000000000000000000000..1c468613464593386f32ab3edb84f32c94a7558f
--- /dev/null
+++ b/tests/stdlib/random.c
@@ -0,0 +1,100 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "test_helpers.h"
+
+/* The output of these tests are checked against that from musl. Other
+ * algorithms may yield different results and still comply with the
+ * POSIX requirements. */
+
+int main(void) {
+ /* Should be enough to exercise the rollover branching in random()
+ * for all possible state array sizes (up to 256 bytes, i.e. 64
+ * 32-bit values). */
+ size_t test_seq_len = 70;
+
+ long random_result;
+
+ // Should give same result as with seed 1
+ puts("Uninitialized:");
+ for (size_t i = 0; i < test_seq_len; i++) {
+ random_result = random();
+ printf("%ld\n", random_result);
+ }
+
+ puts("\nSeed 1:");
+ srandom(1);
+ for (size_t i = 0; i < test_seq_len; i++) {
+ random_result = random();
+ printf("%ld\n", random_result);
+ }
+
+ puts("\nSeed 1337:");
+ srandom(1337);
+ for (size_t i = 0; i < test_seq_len; i++) {
+ random_result = random();
+ printf("%ld\n", random_result);
+ }
+
+ /* 256 bytes (as below) is the largest possible amount of state
+ * data. Created as a uint32_t to avoid possible alignment issues
+ * with char. */
+ uint32_t new_state[64] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+
+ unsigned int seed = 42;
+
+ // Should exercise the different branches in initstate()
+ size_t sizes[] = {8, 31, 32, 63, 64, 127, 128, 255, 256};
+
+ for (size_t j = 0; j < sizeof(sizes)/sizeof(size_t); j++) {
+ size_t size = sizes[j];
+ printf("\nSeed %d, size %ld:\n", seed, size);
+ initstate(seed, (char *)new_state, size);
+
+ for (size_t i = 0; i < test_seq_len; i++) {
+ random_result = random();
+ printf("%ld\n", random_result);
+ }
+ }
+
+ /* Test that setstate() allows the use of a different state array,
+ * and that it correctly returns the old value. */
+ uint32_t other_new_state[64] = {
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+
+ initstate(seed, (char *)other_new_state, 32);
+ printf("\nSeed %d, other state array:\n", seed);
+ for (size_t i = 0; i < test_seq_len; i++) {
+ random_result = random();
+ printf("%ld\n", random_result);
+ }
+
+ char *should_be_other_new_state_ptr = setstate((char *)new_state);
+ if (should_be_other_new_state_ptr == (char *)other_new_state) {
+ puts("\nState data pointer restored correctly by setstate().");
+ }
+ else {
+ puts("\nState data pointer NOT restored correctly by setstate().");
+ }
+ printf("\nSeed %d, back to first state array:\n", seed);
+ for (size_t i = 0; i < test_seq_len; i++) {
+ random_result = random();
+ printf("%ld\n", random_result);
+ }
+
+ // Should yield NULL
+ char *state_with_size_less_than_8 = initstate(seed, (char *)new_state, 7);
+ printf("\nPointer returned by initstate with size < 8: %p\n",
+ state_with_size_less_than_8);
+
+ return 0;
+}