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authorRoland McGrath <roland@gnu.org>1995-09-17 20:23:15 +0000
committerRoland McGrath <roland@gnu.org>1995-09-17 20:23:15 +0000
commit60478656fad8d8a487e9bc52d025f69767c3262b (patch)
tree0ae0836023f1c2f80064e7611f91d19c482208d9 /stdlib
parent9fd18b6c1b397e1af82a0b544f10f946c73864b6 (diff)
downloadglibc-60478656fad8d8a487e9bc52d025f69767c3262b.tar.gz
Sat Sep 16 17:47:19 1995 Ulrich Drepper <drepper@ipd.info.uni-karlsruhe.de>
* elf/elf.h (AT_GID): Fix typo: Read -> Real. * misc/efgvt_r.c: New file. Reentrant version of [efg]cvt functions. * misc/efgcvt.c: Rewrite to use reentrant functions. * misc/hsearch_r.c: New file. Reentrant version of functions from hsearch family. * misc/hsearch.c, misc/tsearch.c: New files. * misc/Makefile (routines): Add efgcvt_r, hsearch_r, hsearch, tsearch. * posix/unistd.h (ttyname_r): Add prototype for new function. * stdlib/drand48_r.c, stdlib/erand48_r.c, stdlib/jrand48_r.c, stdlib/lrand48_r.c, stdlib/mrand48_r.c, stdlib/nrand48_r.c, stdlib/seed48_r.c, stdlib/srand48_r.c, stdlib/lcong48_r.c, stdlib/drand48-iter.c: New files implementing reentrant versions of functions from drand48 family. * stdlib/seed48.c, stdlib/drand48.c, stdlib/erand48.c, stdlib/jrand48.c, stdlib/lrand48.c, stdlib/mrand48.c, stdlib/nrand48.c, stdlib/srand48.c, stdlib/lcong48.c: Rewrite to use reentrant versions. * stdlib/a64l.c, stdlib/l64a.c: New files. Implement a64l() and l64a() functions from SysV library. * stdlib/Makefile (routines): Add drand48_r, erand48_r, lrand48_r, nrand48_r, mrand48_r, jrand48_r, srand48_r, seed48_r, lcong48_r, drand48-iter, a64l, l64a. * stdlib/stdlib.h: Declare them. * stdlib/random_r.c: New file. Reentrant version of functions from random family. * stdlib/stdlib.h: Declare them. * stdlib/random.c: Rewrite to use reentrant functions. * string/strerror_r.c: New file. Reentrant version. * string/strerror.c: Change for new _strerror_internal form. * string/Makefile (routines): Add strerror_r. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Set default value of user_entry to `_start'. Close AT_ENTRY case with `break'. * sysdeps/generic/strstr.c: New and much faster implementation by Stephen R. van den Berg. * sysdeps/generic/_strerror.c: _strerror_internal now takes three argument and has and explicit buffer length. * sysdeps/mach/_strerror.c: Change for new interface with three arguments. * stdio/perror.c, stdio/vfprintf.c: Callers changed. * sysdeps/mach/hurd/ttyname_r.c: New file. Reentrant version. * sysdeps/posix/ttyname_r.c: New file. Reentrant version. * sysdeps/stub/ttyname_r: New file. Define as dummy function. * sysdeps/posix/utimes.c: Include <utime.h> for prototype. (utimes): First parameter to utime must be file, not path. * sysdeps/posix/sysconf.c (__sysconf): Test for CLK_TCK in case _SC_CLK_TCK and return it when available. Test for STREAM_MAX in case _SC_STREAM_MAX and return it when available. Add case for _SC_2_LOCALEDEF which is now available. * posix/sys/types.h [__USE_SVID] (key_t): New type. * sysvipc/Makefile, sysvipc/ftok.c, sysvipc/sys/ipc.h, sysvipc/sys/msg.h, sysvipc/sys/sem.h, sysvipc/sys/shm.h, sysdeps/stub/sys/msq_buf.h, sysdeps/stub/sys/sem_buf.h, sysdeps/stub/sys/shm_buf.h, sysdeps/stub/sys/ipc_buf.h, sysdeps/stub/semctl.c, sysdeps/stub/semget.c, sysdeps/stub/semop.c, sysdeps/stub/shmat.c, sysdeps/stub/shmctl.c, sysdeps/stub/shmdt.c, sysdeps/stub/shmget.c, sysdeps/stub/msgctl.c, sysdeps/stub/msgget.c, sysdeps/stub/msgrcv.c, sysdeps/stub/msgsnd.c: New files. Add implementation of System V IPC.
Diffstat (limited to 'stdlib')
-rw-r--r--stdlib/Makefile10
-rw-r--r--stdlib/a64l.c54
-rw-r--r--stdlib/drand48-iter.c102
-rw-r--r--stdlib/drand48.c33
-rw-r--r--stdlib/drand48_r.c37
-rw-r--r--stdlib/erand48.c34
-rw-r--r--stdlib/erand48_r.c52
-rw-r--r--stdlib/jrand48.c34
-rw-r--r--stdlib/jrand48_r.c49
-rw-r--r--stdlib/l64a.c51
-rw-r--r--stdlib/lcong48.c30
-rw-r--r--stdlib/lcong48_r.c41
-rw-r--r--stdlib/lrand48.c33
-rw-r--r--stdlib/lrand48_r.c32
-rw-r--r--stdlib/mrand48.c33
-rw-r--r--stdlib/mrand48_r.c32
-rw-r--r--stdlib/nrand48.c34
-rw-r--r--stdlib/nrand48_r.c46
-rw-r--r--stdlib/random.c187
-rw-r--r--stdlib/random_r.c337
-rw-r--r--stdlib/seed48.c32
-rw-r--r--stdlib/seed48_r.c41
-rw-r--r--stdlib/srand48.c30
-rw-r--r--stdlib/srand48_r.c52
-rw-r--r--stdlib/stdlib.h109
25 files changed, 1371 insertions, 154 deletions
diff --git a/stdlib/Makefile b/stdlib/Makefile
index 3ea206f623..a28d2a8127 100644
--- a/stdlib/Makefile
+++ b/stdlib/Makefile
@@ -32,10 +32,16 @@ routines := \
abs labs \
div ldiv \
mblen mbstowcs mbtowc wcstombs wctomb \
- random rand \
+ random random_r rand \
+ drand48 erand48 lrand48 nrand48 mrand48 jrand48 \
+ srand48 seed48 lcong48 \
+ drand48_r erand48_r lrand48_r nrand48_r mrand48_r jrand48_r \
+ srand48_r seed48_r lcong48_r \
+ drand48-iter \
strtol strtoul strtoq strtouq \
strtof strtod strtold \
- system
+ system \
+ a64l l64a
distribute := exit.h grouping.h
tests := tst-strtol tst-strtod testmb testrand testsort testdiv
diff --git a/stdlib/a64l.c b/stdlib/a64l.c
new file mode 100644
index 0000000000..3fdaab513b
--- /dev/null
+++ b/stdlib/a64l.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+long
+a64l (string)
+ const char *string;
+{
+ int cnt;
+ long result = 0l;
+
+ for (cnt = 0; cnt < 6; ++cnt)
+ {
+ result <<= 6;
+ switch (string[cnt])
+ {
+ case '.':
+ break;
+ case '/':
+ result |= 1;
+ break;
+ case '0' ... '9':
+ result |= 2 + string[cnt] - '0';
+ break;
+ case 'A' ... 'Z':
+ result |= 12 + string[cnt] - 'A';
+ break;
+ case 'a' ... 'z':
+ result |= 38 + string[cnt] - 'a';
+ break;
+ default:
+ return result >> 6;
+ }
+ }
+
+ return result;
+}
diff --git a/stdlib/drand48-iter.c b/stdlib/drand48-iter.c
new file mode 100644
index 0000000000..013dbe792f
--- /dev/null
+++ b/stdlib/drand48-iter.c
@@ -0,0 +1,102 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <stdlib.h>
+
+
+/* Global state for non-reentrent functions. */
+struct drand48_data __libc_drand48_data;
+
+
+int
+__drand48_iterate (xsubi, buffer)
+ unsigned short int xsubi[3];
+ struct drand48_data *buffer;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (xsubi == NULL || buffer == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ /* Initialize buffer, if not yet done. */
+ if (!buffer->init)
+ {
+ if (sizeof (unsigned short int) == 2)
+ {
+ buffer->a[2] = 0x5;
+ buffer->a[1] = 0xdeec;
+ buffer->a[0] = 0xe66d;
+ }
+ else
+ {
+ buffer->a[2] = 0x5deec;
+ buffer->a[1] = 0xe66d0000;
+ buffer->a[0] = 0;
+ }
+ buffer->c = 0xb;
+ buffer->init = 1;
+ }
+
+ /* Do the real work. We choose a data type which contains at least
+ 48 bits. Because we compute the modulus it does not care how
+ many bits really are computed. */
+
+ if (sizeof (long int) >= 6)
+ {
+ /* The `long' data type is sufficent. */
+ unsigned long int X, a, result;
+
+#define ONE_STEP \
+ if (sizeof (unsigned short int) == 2) \
+ { \
+ X = (xsubi[2] << 16 | xsubi[1]) << 16 | xsubi[0]; \
+ a = (buffer->a[2] << 16 | buffer->a[1]) << 16 | buffer->a[0]; \
+ \
+ result = X * a + buffer->c; \
+ \
+ xsubi[0] = result & 0xffff; \
+ result >>= 16; \
+ xsubi[1] = result & 0xffff; \
+ result >>= 16; \
+ xsubi[2] = result & 0xffff; \
+ } \
+ else \
+ { \
+ X = xsubi[2] << 16 | xsubi[1] >> 16; \
+ a = buffer->a[2] << 16 | buffer->a[1] >> 16; \
+ \
+ result = X * a + buffer->c; \
+ \
+ xsubi[0] = result >> 16 & 0xffffffffl; \
+ xsubi[1] = result << 16 & 0xffff0000l; \
+ }
+ ONE_STEP;
+ }
+ else
+ {
+ /* We have to use the `long long' data type. */
+ unsigned long long int X, a, result;
+ ONE_STEP;
+ }
+
+ return 0;
+}
diff --git a/stdlib/drand48.c b/stdlib/drand48.c
new file mode 100644
index 0000000000..e2d8450044
--- /dev/null
+++ b/stdlib/drand48.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+double
+drand48 ()
+{
+ double result;
+
+ (void) erand48_r (__libc_drand48_data.X, &__libc_drand48_data, &result);
+
+ return result;
+}
diff --git a/stdlib/drand48_r.c b/stdlib/drand48_r.c
new file mode 100644
index 0000000000..eaba057fa1
--- /dev/null
+++ b/stdlib/drand48_r.c
@@ -0,0 +1,37 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <math.h>
+#include <stdlib.h>
+
+int
+drand48_r (buffer, result)
+ struct drand48_data *buffer;
+ double *result;
+{
+ /* be generous for the arguments, detect some errors. */
+ if (buffer == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ return erand48_r (buffer->X, buffer, result);
+}
diff --git a/stdlib/erand48.c b/stdlib/erand48.c
new file mode 100644
index 0000000000..b63c3bddea
--- /dev/null
+++ b/stdlib/erand48.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+double
+erand48 (xsubi)
+ unsigned short int xsubi[3];
+{
+ double result;
+
+ (void) erand48_r (xsubi, &__libc_drand48_data, &result);
+
+ return result;
+}
diff --git a/stdlib/erand48_r.c b/stdlib/erand48_r.c
new file mode 100644
index 0000000000..86d2f734d9
--- /dev/null
+++ b/stdlib/erand48_r.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <errno.h>
+#include <math.h>
+#include <stdlib.h>
+
+int
+erand48_r (xsubi, buffer, result)
+ unsigned short int xsubi[3];
+ struct drand48_data *buffer;
+ double *result;
+{
+ int i;
+
+ /* Be generous for the arguments, detect some errors. */
+ if (result == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ /* Compute next state. */
+ if (__drand48_iterate (xsubi, buffer) < 0)
+ return -1;
+
+ *result = 0.0;
+ for (i = 4 / sizeof (unsigned short int); i >= 0; --i)
+ {
+ double factor = ldexp (1.0, (i - 6) * sizeof (unsigned short int));
+
+ *result += factor * (double) xsubi[i];
+ }
+
+ return 0;
+}
diff --git a/stdlib/jrand48.c b/stdlib/jrand48.c
new file mode 100644
index 0000000000..bdd62fb241
--- /dev/null
+++ b/stdlib/jrand48.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+long
+jrand48 (xsubi)
+ unsigned short int xsubi[3];
+{
+ long result;
+
+ (void) jrand48_r (xsubi, &__libc_drand48_data, &result);
+
+ return result;
+}
diff --git a/stdlib/jrand48_r.c b/stdlib/jrand48_r.c
new file mode 100644
index 0000000000..b1a4378028
--- /dev/null
+++ b/stdlib/jrand48_r.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+int
+jrand48_r (xsubi, buffer, result)
+ unsigned short int xsubi[3];
+ struct drand48_data *buffer;
+ long *result;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (result == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ /* Compute next state. */
+ if (__drand48_iterate (xsubi, buffer) < 0)
+ return -1;
+
+ /* Store the result. */
+ if (sizeof (unsigned short int) == 2)
+ *result = (xsubi[2] & 0x7fff) | xsubi[1];
+ else
+ *result = xsubi[2] & 0x7fffffffl;
+
+ if (xsubi[2] & (1 << (sizeof (xsubi[2]) * 8 - 1)))
+ *result *= -1;
+
+ return 0;
+}
diff --git a/stdlib/l64a.c b/stdlib/l64a.c
new file mode 100644
index 0000000000..ad19a3b6eb
--- /dev/null
+++ b/stdlib/l64a.c
@@ -0,0 +1,51 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Conversion table. */
+static const char conv_tab[64] =
+{
+ '.', '/', '0', '1', '2', '3', '4', '5',
+ '6', '7', '8', '9', 'A', 'B', 'C', 'D',
+ 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
+ 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
+ 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b',
+ 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
+ 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
+ 's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
+};
+
+const char *
+l64a (n)
+ long n;
+{
+ static char result[7];
+ int cnt;
+
+ result[6] = '\0';
+
+ for (cnt = 5; cnt >= 0; --cnt)
+ {
+ result[cnt] = n & 0x3f;
+ n >>= 6;
+ }
+
+ return result;
+}
diff --git a/stdlib/lcong48.c b/stdlib/lcong48.c
new file mode 100644
index 0000000000..7e4d18806f
--- /dev/null
+++ b/stdlib/lcong48.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+void
+lcong48 (param)
+ unsigned short int param[7];
+{
+ (void) lcong48_r (param, &__libc_drand48_data);
+}
diff --git a/stdlib/lcong48_r.c b/stdlib/lcong48_r.c
new file mode 100644
index 0000000000..cc38b4dc7c
--- /dev/null
+++ b/stdlib/lcong48_r.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+int
+lcong48_r (param, buffer)
+ unsigned short int param[7];
+ struct drand48_data *buffer;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (buffer == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ /* Store the given values. */
+ memcpy (buffer->X, &param[0], sizeof (buffer->X));
+ memcpy (buffer->a, &param[3], sizeof (buffer->a));
+ buffer->c = param[6];
+ buffer->init = 1;
+
+ return 0;
+}
diff --git a/stdlib/lrand48.c b/stdlib/lrand48.c
new file mode 100644
index 0000000000..a3e6ea1a7d
--- /dev/null
+++ b/stdlib/lrand48.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+long
+lrand48 ()
+{
+ long result;
+
+ (void) nrand48_r (__libc_drand48_data.X, &__libc_drand48_data, &result);
+
+ return result;
+}
diff --git a/stdlib/lrand48_r.c b/stdlib/lrand48_r.c
new file mode 100644
index 0000000000..696722a8cc
--- /dev/null
+++ b/stdlib/lrand48_r.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+int
+lrand48_r (buffer, result)
+ struct drand48_data *buffer;
+ long *result;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (buffer == NULL)
+ return -1;
+
+ return nrand48_r (buffer->X, buffer, result);
+}
diff --git a/stdlib/mrand48.c b/stdlib/mrand48.c
new file mode 100644
index 0000000000..e71b23465e
--- /dev/null
+++ b/stdlib/mrand48.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+long
+mrand48 ()
+{
+ long result;
+
+ (void) jrand48_r (__libc_drand48_data.X, &__libc_drand48_data, &result);
+
+ return result;
+}
diff --git a/stdlib/mrand48_r.c b/stdlib/mrand48_r.c
new file mode 100644
index 0000000000..92d1b11121
--- /dev/null
+++ b/stdlib/mrand48_r.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+int
+mrand48_r (buffer, result)
+ struct drand48_data *buffer;
+ long *result;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (buffer == NULL)
+ return -1;
+
+ return jrand48_r (buffer->X, buffer, result);
+}
diff --git a/stdlib/nrand48.c b/stdlib/nrand48.c
new file mode 100644
index 0000000000..0dd2c2b34f
--- /dev/null
+++ b/stdlib/nrand48.c
@@ -0,0 +1,34 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+long
+nrand48 (xsubi)
+ unsigned short int xsubi[3];
+{
+ long result;
+
+ (void) nrand48_r (xsubi, &__libc_drand48_data, &result);
+
+ return result;
+}
diff --git a/stdlib/nrand48_r.c b/stdlib/nrand48_r.c
new file mode 100644
index 0000000000..1bbc29e7ef
--- /dev/null
+++ b/stdlib/nrand48_r.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+int
+nrand48_r (xsubi, buffer, result)
+ unsigned short int xsubi[3];
+ struct drand48_data *buffer;
+ long *result;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (result == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ /* Compute next state. */
+ if (__drand48_iterate (xsubi, buffer) < 0)
+ return -1;
+
+ /* Store the result. */
+ if (sizeof (unsigned short int) == 2)
+ *result = xsubi[2] << 15 | xsubi[1] >> 1;
+ else
+ *result = xsubi[2] >> 1;
+
+ return 0;
+}
diff --git a/stdlib/random.c b/stdlib/random.c
index 473a5b13d3..c3f8eaa0a3 100644
--- a/stdlib/random.c
+++ b/stdlib/random.c
@@ -19,10 +19,9 @@
* This is derived from the Berkeley source:
* @(#)random.c 5.5 (Berkeley) 7/6/88
* It was reworked for the GNU C Library by Roland McGrath.
+ * Rewritten to use reentrent functions by Ulrich Drepper, 1995.
*/
-#include <ansidecl.h>
-#include <errno.h>
#include <limits.h>
#include <stddef.h>
#include <stdlib.h>
@@ -105,10 +104,6 @@
#define MAX_TYPES 5 /* Max number of types above. */
-static int degrees[MAX_TYPES] = { DEG_0, DEG_1, DEG_2, DEG_3, DEG_4 };
-static int seps[MAX_TYPES] = { SEP_0, SEP_1, SEP_2, SEP_3, SEP_4 };
-
-
/* Initially, everything is set up as if from:
initstate(1, randtbl, 128);
@@ -132,6 +127,9 @@ static long int randtbl[DEG_3 + 1] =
-205601318,
};
+
+static struct random_data unsafe_state =
+ {
/* FPTR and RPTR are two pointers into the state info, a front and a rear
pointer. These two pointers are always rand_sep places aparts, as they
cycle through the state information. (Yes, this does mean we could get
@@ -142,10 +140,8 @@ static long int randtbl[DEG_3 + 1] =
in the initialization of randtbl) because the state table pointer is set
to point to randtbl[1] (as explained below).) */
-static long int *fptr = &randtbl[SEP_3 + 1];
-static long int *rptr = &randtbl[1];
-
-
+ fptr : &randtbl[SEP_3 + 1],
+ rptr : &randtbl[1],
/* The following things are the pointer to the state information table,
the type of the current generator, the degree of the current polynomial
@@ -157,13 +153,14 @@ static long int *rptr = &randtbl[1];
indexing every time to find the address of the last element to see if
the front and rear pointers have wrapped. */
-static long int *state = &randtbl[1];
+ state : &randtbl[1],
-static int rand_type = TYPE_3;
-static int rand_deg = DEG_3;
-static int rand_sep = SEP_3;
+ rand_type : TYPE_3,
+ rand_deg : DEG_3,
+ rand_sep : SEP_3,
-static long int *end_ptr = &randtbl[sizeof(randtbl) / sizeof(randtbl[0])];
+ end_ptr : &randtbl[sizeof (randtbl) / sizeof (randtbl[0])]
+};
/* Initialize the random number generator based on the given seed. If the
type is the trivial no-state-information type, just remember the seed.
@@ -174,27 +171,10 @@ static long int *end_ptr = &randtbl[sizeof(randtbl) / sizeof(randtbl[0])];
introduced by the L.C.R.N.G. Note that the initialization of randtbl[]
for default usage relies on values produced by this routine. */
void
-DEFUN(__srandom, (x), unsigned int x)
+__srandom (x)
+ unsigned int x;
{
- state[0] = x;
- if (rand_type != TYPE_0)
- {
- register long int i;
- for (i = 1; i < rand_deg; ++i)
- {
- /* This does:
- state[i] = (16807 * state[i - 1]) % 2147483647;
- but avoids overflowing 31 bits. */
- long int hi = state[i - 1] / 127773;
- long int lo = state[i - 1] % 127773;
- long int test = 16807 * lo - 2836 * hi;
- state[i] = test + (test < 0 ? 2147483647 : 0);
- }
- fptr = &state[rand_sep];
- rptr = &state[0];
- for (i = 0; i < 10 * rand_deg; ++i)
- (void) __random ();
- }
+ (void) __srandom_r (x, &unsafe_state);
}
weak_alias (__srandom, srandom)
@@ -211,60 +191,15 @@ weak_alias (__srandom, srand)
Note: The first thing we do is save the current state, if any, just like
setstate so that it doesn't matter when initstate is called.
Returns a pointer to the old state. */
-PTR
-DEFUN(__initstate, (seed, arg_state, n),
- unsigned int seed AND PTR arg_state AND size_t n)
+void *
+__initstate (seed, arg_state, n)
+ unsigned int seed;
+ void *arg_state;
+ size_t n;
{
- PTR ostate = (PTR) &state[-1];
-
- if (rand_type == TYPE_0)
- state[-1] = rand_type;
- else
- state[-1] = (MAX_TYPES * (rptr - state)) + rand_type;
- if (n < BREAK_1)
- {
- if (n < BREAK_0)
- {
- errno = EINVAL;
- return NULL;
- }
- rand_type = TYPE_0;
- rand_deg = DEG_0;
- rand_sep = SEP_0;
- }
- else if (n < BREAK_2)
- {
- rand_type = TYPE_1;
- rand_deg = DEG_1;
- rand_sep = SEP_1;
- }
- else if (n < BREAK_3)
- {
- rand_type = TYPE_2;
- rand_deg = DEG_2;
- rand_sep = SEP_2;
- }
- else if (n < BREAK_4)
- {
- rand_type = TYPE_3;
- rand_deg = DEG_3;
- rand_sep = SEP_3;
- }
- else
- {
- rand_type = TYPE_4;
- rand_deg = DEG_4;
- rand_sep = SEP_4;
- }
-
- state = &((long int *) arg_state)[1]; /* First location. */
- /* Must set END_PTR before srandom. */
- end_ptr = &state[rand_deg];
- __srandom(seed);
- if (rand_type == TYPE_0)
- state[-1] = rand_type;
- else
- state[-1] = (MAX_TYPES * (rptr - state)) + rand_type;
+ void *ostate = (void *) &unsafe_state.state[-1];
+
+ __initstate_r (seed, arg_state, n, &unsafe_state);
return ostate;
}
@@ -279,44 +214,14 @@ weak_alias (__initstate, initstate)
to the order in which things are done, it is OK to call setstate with the
same state as the current state
Returns a pointer to the old state information. */
-PTR
-DEFUN(__setstate, (arg_state), PTR arg_state)
+void *
+__setstate (arg_state)
+ void *arg_state;
{
- register long int *new_state = (long int *) arg_state;
- register int type = new_state[0] % MAX_TYPES;
- register int rear = new_state[0] / MAX_TYPES;
- PTR ostate = (PTR) &state[-1];
-
- if (rand_type == TYPE_0)
- state[-1] = rand_type;
- else
- state[-1] = (MAX_TYPES * (rptr - state)) + rand_type;
-
- switch (type)
- {
- case TYPE_0:
- case TYPE_1:
- case TYPE_2:
- case TYPE_3:
- case TYPE_4:
- rand_type = type;
- rand_deg = degrees[type];
- rand_sep = seps[type];
- break;
- default:
- /* State info munged. */
- errno = EINVAL;
- return NULL;
- }
-
- state = &new_state[1];
- if (rand_type != TYPE_0)
- {
- rptr = &state[rear];
- fptr = &state[(rear + rand_sep) % rand_deg];
- }
- /* Set end_ptr too. */
- end_ptr = &state[rand_deg];
+ void *ostate = (void *) &unsafe_state.state[-1];
+
+ if (__setstate_r (arg_state, &unsafe_state) < 0)
+ return NULL;
return ostate;
}
@@ -335,33 +240,13 @@ weak_alias (__setstate, setstate)
pointer if the front one has wrapped. Returns a 31-bit random number. */
long int
-DEFUN_VOID(__random)
+__random ()
{
- if (rand_type == TYPE_0)
- {
- state[0] = ((state[0] * 1103515245) + 12345) & LONG_MAX;
- return state[0];
- }
- else
- {
- long int i;
- *fptr += *rptr;
- /* Chucking least random bit. */
- i = (*fptr >> 1) & LONG_MAX;
- ++fptr;
- if (fptr >= end_ptr)
- {
- fptr = state;
- ++rptr;
- }
- else
- {
- ++rptr;
- if (rptr >= end_ptr)
- rptr = state;
- }
- return i;
- }
+ long int retval;
+
+ (void) __random_r (&unsafe_state, &retval);
+
+ return retval;
}
weak_alias (__random, random)
diff --git a/stdlib/random_r.c b/stdlib/random_r.c
new file mode 100644
index 0000000000..aa7a33fa6b
--- /dev/null
+++ b/stdlib/random_r.c
@@ -0,0 +1,337 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley. The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/*
+ * This is derived from the Berkeley source:
+ * @(#)random.c 5.5 (Berkeley) 7/6/88
+ * It was reworked for the GNU C Library by Roland McGrath.
+ * Rewritten to be reentrent by Ulrich Drepper, 1995
+ */
+
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdlib.h>
+
+
+/* An improved random number generation package. In addition to the standard
+ rand()/srand() like interface, this package also has a special state info
+ interface. The initstate() routine is called with a seed, an array of
+ bytes, and a count of how many bytes are being passed in; this array is
+ then initialized to contain information for random number generation with
+ that much state information. Good sizes for the amount of state
+ information are 32, 64, 128, and 256 bytes. The state can be switched by
+ calling the setstate() function with the same array as was initiallized
+ with initstate(). By default, the package runs with 128 bytes of state
+ information and generates far better random numbers than a linear
+ congruential generator. If the amount of state information is less than
+ 32 bytes, a simple linear congruential R.N.G. is used. Internally, the
+ state information is treated as an array of longs; the zeroeth element of
+ the array is the type of R.N.G. being used (small integer); the remainder
+ of the array is the state information for the R.N.G. Thus, 32 bytes of
+ state information will give 7 longs worth of state information, which will
+ allow a degree seven polynomial. (Note: The zeroeth word of state
+ information also has some other information stored in it; see setstate
+ for details). The random number generation technique is a linear feedback
+ shift register approach, employing trinomials (since there are fewer terms
+ to sum up that way). In this approach, the least significant bit of all
+ the numbers in the state table will act as a linear feedback shift register,
+ and will have period 2^deg - 1 (where deg is the degree of the polynomial
+ being used, assuming that the polynomial is irreducible and primitive).
+ The higher order bits will have longer periods, since their values are
+ also influenced by pseudo-random carries out of the lower bits. The
+ total period of the generator is approximately deg*(2**deg - 1); thus
+ doubling the amount of state information has a vast influence on the
+ period of the generator. Note: The deg*(2**deg - 1) is an approximation
+ only good for large deg, when the period of the shift register is the
+ dominant factor. With deg equal to seven, the period is actually much
+ longer than the 7*(2**7 - 1) predicted by this formula. */
+
+
+
+/* For each of the currently supported random number generators, we have a
+ break value on the amount of state information (you need at least thi
+ bytes of state info to support this random number generator), a degree for
+ the polynomial (actually a trinomial) that the R.N.G. is based on, and
+ separation between the two lower order coefficients of the trinomial. */
+
+/* Linear congruential. */
+#define TYPE_0 0
+#define BREAK_0 8
+#define DEG_0 0
+#define SEP_0 0
+
+/* x**7 + x**3 + 1. */
+#define TYPE_1 1
+#define BREAK_1 32
+#define DEG_1 7
+#define SEP_1 3
+
+/* x**15 + x + 1. */
+#define TYPE_2 2
+#define BREAK_2 64
+#define DEG_2 15
+#define SEP_2 1
+
+/* x**31 + x**3 + 1. */
+#define TYPE_3 3
+#define BREAK_3 128
+#define DEG_3 31
+#define SEP_3 3
+
+/* x**63 + x + 1. */
+#define TYPE_4 4
+#define BREAK_4 256
+#define DEG_4 63
+#define SEP_4 1
+
+
+/* Array versions of the above information to make code run faster.
+ Relies on fact that TYPE_i == i. */
+
+#define MAX_TYPES 5 /* Max number of types above. */
+
+static const int degrees[MAX_TYPES] = { DEG_0, DEG_1, DEG_2, DEG_3, DEG_4 };
+static const int seps[MAX_TYPES] = { SEP_0, SEP_1, SEP_2, SEP_3, SEP_4 };
+
+
+
+
+/* Initialize the random number generator based on the given seed. If the
+ type is the trivial no-state-information type, just remember the seed.
+ Otherwise, initializes state[] based on the given "seed" via a linear
+ congruential generator. Then, the pointers are set to known locations
+ that are exactly rand_sep places apart. Lastly, it cycles the state
+ information a given number of times to get rid of any initial dependencies
+ introduced by the L.C.R.N.G. Note that the initialization of randtbl[]
+ for default usage relies on values produced by this routine. */
+int
+__srandom_r (x, buf)
+ unsigned int x;
+ struct random_data *buf;
+{
+ if (buf == NULL || buf->rand_type < TYPE_0 || buf->rand_type > TYPE_4)
+ return -1;
+
+ buf->state[0] = x;
+ if (buf->rand_type != TYPE_0)
+ {
+ long int i;
+ for (i = 1; i < buf->rand_deg; ++i)
+ {
+ /* This does:
+ state[i] = (16807 * state[i - 1]) % 2147483647;
+ but avoids overflowing 31 bits. */
+ long int hi = buf->state[i - 1] / 127773;
+ long int lo = buf->state[i - 1] % 127773;
+ long int test = 16807 * lo - 2836 * hi;
+ buf->state[i] = test + (test < 0 ? 2147483647 : 0);
+ }
+ buf->fptr = &buf->state[buf->rand_sep];
+ buf->rptr = &buf->state[0];
+ for (i = 0; i < 10 * buf->rand_deg; ++i)
+ {
+ long int discard;
+ (void) __random_r (buf, &discard);
+ }
+ }
+
+ return 0;
+}
+
+weak_alias (__srandom_r, srandom_r)
+weak_alias (__srandom_r, srand_r)
+
+/* Initialize the state information in the given array of N bytes for
+ future random number generation. Based on the number of bytes we
+ are given, and the break values for the different R.N.G.'s, we choose
+ the best (largest) one we can and set things up for it. srandom is
+ then called to initialize the state information. Note that on return
+ from srandom, we set state[-1] to be the type multiplexed with the current
+ value of the rear pointer; this is so successive calls to initstate won't
+ lose this information and will be able to restart with setstate.
+ Note: The first thing we do is save the current state, if any, just like
+ setstate so that it doesn't matter when initstate is called.
+ Returns a pointer to the old state. */
+int
+__initstate_r (seed, arg_state, n, buf)
+ unsigned int seed;
+ void *arg_state;
+ size_t n;
+ struct random_data *buf;
+{
+ if (buf == NULL)
+ return -1;
+
+ if (buf->rand_type == TYPE_0)
+ buf->state[-1] = buf->rand_type;
+ else
+ buf->state[-1] = (MAX_TYPES * (buf->rptr - buf->state)) + buf->rand_type;
+ if (n < BREAK_1)
+ {
+ if (n < BREAK_0)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ buf->rand_type = TYPE_0;
+ buf->rand_deg = DEG_0;
+ buf->rand_sep = SEP_0;
+ }
+ else if (n < BREAK_2)
+ {
+ buf->rand_type = TYPE_1;
+ buf->rand_deg = DEG_1;
+ buf->rand_sep = SEP_1;
+ }
+ else if (n < BREAK_3)
+ {
+ buf->rand_type = TYPE_2;
+ buf->rand_deg = DEG_2;
+ buf->rand_sep = SEP_2;
+ }
+ else if (n < BREAK_4)
+ {
+ buf->rand_type = TYPE_3;
+ buf->rand_deg = DEG_3;
+ buf->rand_sep = SEP_3;
+ }
+ else
+ {
+ buf->rand_type = TYPE_4;
+ buf->rand_deg = DEG_4;
+ buf->rand_sep = SEP_4;
+ }
+
+ buf->state = &((long int *) arg_state)[1]; /* First location. */
+ /* Must set END_PTR before srandom. */
+ buf->end_ptr = &buf->state[buf->rand_deg];
+
+ __srandom_r (seed, buf);
+
+ if (buf->rand_type == TYPE_0)
+ buf->state[-1] = buf->rand_type;
+ else
+ buf->state[-1] = (MAX_TYPES * (buf->rptr - buf->state)) + buf->rand_type;
+
+ return 0;
+}
+
+weak_alias (__initstate_r, initstate_r)
+
+/* Restore the state from the given state array.
+ Note: It is important that we also remember the locations of the pointers
+ in the current state information, and restore the locations of the pointers
+ from the old state information. This is done by multiplexing the pointer
+ location into the zeroeth word of the state information. Note that due
+ to the order in which things are done, it is OK to call setstate with the
+ same state as the current state
+ Returns a pointer to the old state information. */
+int
+__setstate_r (arg_state, buf)
+ void *arg_state;
+ struct random_data *buf;
+{
+ long int *new_state = (long int *) arg_state;
+ int type = new_state[0] % MAX_TYPES;
+ int rear = new_state[0] / MAX_TYPES;
+
+ if (buf == NULL)
+ return -1;
+
+ if (buf->rand_type == TYPE_0)
+ buf->state[-1] = buf->rand_type;
+ else
+ buf->state[-1] = (MAX_TYPES * (buf->rptr - buf->state)) + buf->rand_type;
+
+ switch (type)
+ {
+ case TYPE_0:
+ case TYPE_1:
+ case TYPE_2:
+ case TYPE_3:
+ case TYPE_4:
+ buf->rand_type = type;
+ buf->rand_deg = degrees[type];
+ buf->rand_sep = seps[type];
+ break;
+ default:
+ /* State info munged. */
+ errno = EINVAL;
+ return -1;
+ }
+
+ buf->state = &new_state[1];
+ if (buf->rand_type != TYPE_0)
+ {
+ buf->rptr = &buf->state[rear];
+ buf->fptr = &buf->state[(rear + buf->rand_sep) % buf->rand_deg];
+ }
+ /* Set end_ptr too. */
+ buf->end_ptr = &buf->state[buf->rand_deg];
+
+ return 0;
+}
+
+weak_alias (__setstate_r, setstate_r)
+
+/* If we are using the trivial TYPE_0 R.N.G., just do the old linear
+ congruential bit. Otherwise, we do our fancy trinomial stuff, which is the
+ same in all ther other cases due to all the global variables that have been
+ set up. The basic operation is to add the number at the rear pointer into
+ the one at the front pointer. Then both pointers are advanced to the next
+ location cyclically in the table. The value returned is the sum generated,
+ reduced to 31 bits by throwing away the "least random" low bit.
+ Note: The code takes advantage of the fact that both the front and
+ rear pointers can't wrap on the same call by not testing the rear
+ pointer if the front one has wrapped. Returns a 31-bit random number. */
+
+int
+__random_r (buf, result)
+ struct random_data *buf;
+ long int *result;
+{
+ if (buf == NULL || result == NULL)
+ return -1;
+
+ if (buf->rand_type == TYPE_0)
+ {
+ buf->state[0] = ((buf->state[0] * 1103515245) + 12345) & LONG_MAX;
+ *result = buf->state[0];
+ }
+ else
+ {
+ *buf->fptr += *buf->rptr;
+ /* Chucking least random bit. */
+ *result = (*buf->fptr >> 1) & LONG_MAX;
+ ++buf->fptr;
+ if (buf->fptr >= buf->end_ptr)
+ {
+ buf->fptr = buf->state;
+ ++buf->rptr;
+ }
+ else
+ {
+ ++buf->rptr;
+ if (buf->rptr >= buf->end_ptr)
+ buf->rptr = buf->state;
+ }
+ }
+ return 0;
+}
+
+weak_alias (__random_r, random_r)
diff --git a/stdlib/seed48.c b/stdlib/seed48.c
new file mode 100644
index 0000000000..634f9a72fc
--- /dev/null
+++ b/stdlib/seed48.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+unsigned short int *
+seed48 (seed16v)
+ unsigned short int seed16v[3];
+{
+ (void) seed48_r (seed16v, &__libc_drand48_data);
+
+ return __libc_drand48_data.old_X;
+}
diff --git a/stdlib/seed48_r.c b/stdlib/seed48_r.c
new file mode 100644
index 0000000000..4d43507742
--- /dev/null
+++ b/stdlib/seed48_r.c
@@ -0,0 +1,41 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+int
+seed48_r (seed16v, buffer)
+ unsigned short int seed16v[3];
+ struct drand48_data *buffer;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (buffer == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ /* Save old value at a private place to be used as return value. */
+ memcpy (buffer->old_X, buffer->X, sizeof (buffer->X));
+
+ /* Install new state. */
+ memcpy (buffer->X, seed16v, sizeof (buffer->X));
+
+ return 0;
+}
diff --git a/stdlib/srand48.c b/stdlib/srand48.c
new file mode 100644
index 0000000000..80ada310c3
--- /dev/null
+++ b/stdlib/srand48.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+/* Global state for non-reentrent functions. Defined in drand48-iter.c. */
+extern struct drand48_data __libc_drand48_data;
+
+void
+srand48 (seedval)
+ long seedval;
+{
+ (void) srand48_r (seedval, &__libc_drand48_data);
+}
diff --git a/stdlib/srand48_r.c b/stdlib/srand48_r.c
new file mode 100644
index 0000000000..7e77d1675a
--- /dev/null
+++ b/stdlib/srand48_r.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, August 1995.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+#include <stdlib.h>
+
+int
+srand48_r (seedval, buffer)
+ long seedval;
+ struct drand48_data *buffer;
+{
+ /* Be generous for the arguments, detect some errors. */
+ if (buffer == NULL)
+ {
+ errno = EFAULT;
+ return -1;
+ }
+
+ /* The standards say we only have 32 bits. */
+ if (sizeof (long) > 4)
+ seedval &= 0xffffffffl;
+
+ if (sizeof (unsigned short int) == 2)
+ {
+ buffer->X[2] = seedval >> 16;
+ buffer->X[1] = seedval & 0xffffl;
+ buffer->X[0] = 0x330e;
+ }
+ else
+ {
+ buffer->X[2] = seedval;
+ buffer->X[1] = 0x330e0000;
+ buffer->X[0] = 0;
+ }
+
+ return 0;
+}
diff --git a/stdlib/stdlib.h b/stdlib/stdlib.h
index 2a3cf8ec5f..c6c504a143 100644
--- a/stdlib/stdlib.h
+++ b/stdlib/stdlib.h
@@ -198,7 +198,83 @@ extern __inline __ptr_t initstate (unsigned int __seed,
extern __inline __ptr_t setstate (__ptr_t __statebuf)
{ return __setstate (__statebuf); }
#endif /* Optimizing GCC >=2. */
-#endif /* Use BSD. */
+
+#ifdef __USE_REENTRANT
+/* Reentrant versions of the `random' family of functions.
+ These functions all use the following data structure to contain
+ state, rather than global state variables. */
+
+struct random_data
+ {
+ long int *fptr; /* Front pointer. */
+ long int *rptr; /* Rear pointer. */
+ long int *state; /* Array of state values. */
+ int rand_type; /* Type of random number generator. */
+ int rand_deg; /* Degree of random number generator. */
+ int rand_sep; /* Distance between front and rear. */
+ long int *end_ptr; /* Pointer behind state table. */
+ };
+
+extern int __random_r __P ((struct random_data *__buf, long int *__result));
+extern int __srandom_r __P ((unsigned int __seed, struct random_data *__buf));
+extern int __initstate_r __P ((unsigned int __seed, __ptr_t __statebuf,
+ size_t __statelen, struct random_data *__buf));
+extern int __setstate_r __P ((__ptr_t __statebuf, struct random_data *__buf));
+
+extern int random_r __P ((struct random_data *__buf, long int *__result));
+extern int srandom_r __P ((unsigned int __seed, struct random_data *__buf));
+extern int initstate_r __P ((unsigned int __seed, __ptr_t __statebuf,
+ size_t __statelen, struct random_data *__buf));
+extern int setstate_r __P ((__ptr_t __statebuf, struct random_data *__buf));
+#endif /* __USE_REENTRANT. */
+#endif /* Use BSD. */
+
+
+#ifdef __USE_SVID
+/* System V style 48-bit random number generator functions. */
+
+/* Data structure for communication with thread safe versions. */
+struct drand48_data
+ {
+ unsigned short int X[3]; /* Current state. */
+ unsigned short int a[3]; /* Factor in congruential formula. */
+ unsigned short int c; /* Additive const. in congruential formula. */
+ unsigned short int old_X[3]; /* Old state. */
+ int init; /* Flag for initializing. */
+ };
+
+/* Return non-negative, double-precision floating-point value in [0.0,1.0). */
+extern double drand48 __P ((void));
+extern int drand48_r __P ((struct drand48_data *__buffer, double *__result));
+extern double erand48 __P ((unsigned short int __xsubi[3]));
+extern int erand48_r __P ((unsigned short int __xsubi[3],
+ struct drand48_data *__buffer, double *__result));
+/* Return non-negative, long integer in [0,2^31). */
+extern long lrand48 __P ((void));
+extern int lrand48_r __P ((struct drand48_data *__buffer, long *__result));
+extern long nrand48 __P ((unsigned short int __xsubi[3]));
+extern int nrand48_r __P ((unsigned short int __xsubi[3],
+ struct drand48_data *__buffer, long *__result));
+/* Return signed, long integers in [-2^31,2^31). */
+extern long mrand48 __P ((void));
+extern int mrand48_r __P ((struct drand48_data *__buffer, long *__result));
+extern long jrand48 __P ((unsigned short int __xsubi[3]));
+extern int jrand48_r __P ((unsigned short int __xsubi[3],
+ struct drand48_data *__buffer, long *__result));
+/* Seed random number generator. */
+extern void srand48 __P ((long __seedval));
+extern int srand48_r __P ((long __seedval, struct drand48_data *__buffer));
+extern unsigned short int *seed48 __P ((unsigned short int __seed16v[3]));
+extern int seed48_r __P ((unsigned short int __seed16v[3],
+ struct drand48_data *__buffer));
+extern void lcong48 __P ((unsigned short int __param[7]));
+extern int lcong48_r __P ((unsigned short int __param[7],
+ struct drand48_data *__buffer));
+
+/* Internal function to compute next state of the generator. */
+extern int __drand48_iterate __P ((unsigned short int __xsubi[3],
+ struct drand48_data *__buffer));
+#endif /* __USE_SVID. */
/* Allocate SIZE bytes of memory. */
@@ -268,7 +344,10 @@ extern int system __P ((__const char *__command));
/* Shorthand for type of comparison functions. */
+#ifndef __COMPAR_FN_T
+#define __COMPAR_FN_T
typedef int (*__compar_fn_t) __P ((__const __ptr_t, __const __ptr_t));
+#endif
#ifdef __USE_GNU
typedef __compar_fn_t comparison_fn_t;
@@ -308,6 +387,34 @@ extern __CONSTVALUE div_t div __P ((int __numer, int __denom));
extern __CONSTVALUE ldiv_t ldiv __P ((long int __numer, long int __denom));
+#ifdef __USE_SVID
+/* Convert floating point numbers to strings. The returned values are
+ valid only until another call to the same function. */
+
+/* Convert VALUE to a string with NDIGIT digits and return a pointer to
+ this. Set *DECPT with the position of the decimal character and *SIGN
+ with the sign of the number. */
+char *ecvt __P ((double __value, int __ndigit, int *__decpt, int *sign));
+
+/* Convert VALUE to a string rounded to NDIGIT decimal digits. Set *DECPT
+ with the position of the decimal character and *SIGN with the sign of
+ the number. */
+char *fcvt __P ((double __value, int __ndigit, int *__decpt, int *sign));
+
+/* If possible convert VALUE to a string with NDIGIT significant digits.
+ Otherwise use exponential representation. The resulting string will
+ be written to BUF. */
+char *gcvt __P ((double __value, int __ndigit, char *__buf));
+
+/* Reentrant version of the functions above which provide their own
+ buffers. */
+int ecvt_r __P ((double __value, int __ndigit, int *__decpt, int *sign,
+ char *__buf, int *__len));
+int fcvt_r __P ((double __value, int __ndigit, int *__decpt, int *sign,
+ char *__buf, int *__len));
+#endif
+
+
/* Return the length of the multibyte character
in S, which is no longer than N. */
extern int mblen __P ((__const char *__s, size_t __n));