Import CSRG 4.4BSD-Lite2 lib/libc onto vendor branch

7 files changed, 105 insertions, 58 deletions

diff --git a/lib/libc/stdlib/Makefile.inc b/lib/libc/stdlib/Makefile.inc
index 5298202..9982037 100644
--- a/lib/libc/stdlib/Makefile.inc
+++ b/lib/libc/stdlib/Makefile.inc
@@ -1,4 +1,4 @@
-#	@(#)Makefile.inc	8.2 (Berkeley) 2/16/94
+#	@(#)Makefile.inc	8.3 (Berkeley) 2/4/95
 
 # machine-independent stdlib sources
 .PATH: ${.CURDIR}/${MACHINE}/stdlib ${.CURDIR}/stdlib
@@ -6,7 +6,7 @@
 SRCS+=	abort.c atexit.c atof.c atoi.c atol.c bsearch.c calloc.c div.c \
 	exit.c getenv.c getopt.c getsubopt.c heapsort.c labs.c ldiv.c \
 	malloc.c merge.c putenv.c qsort.c radixsort.c rand.c random.c \
-	realpath.c setenv.c strtod.c strtol.c strtoq.c strtoul.c \
+	setenv.c strtod.c strtol.c strtoq.c strtoul.c \
 	strtouq.c system.c
 
 # machine-dependent stdlib sources
@@ -15,7 +15,7 @@ SRCS+=	abort.c atexit.c atof.c atoi.c atol.c bsearch.c calloc.c div.c \
 MAN3+=	abort.0 abs.0 alloca.0 atexit.0 atof.0 atoi.0 atol.0 bsearch.0 \
 	calloc.0 div.0 exit.0 free.0 getenv.0 getopt.0 getsubopt.0 labs.0 \
 	ldiv.0 malloc.0 memory.0 qsort.0 radixsort.0 rand.0 random.0 \
-	realloc.0 realpath.0 strtod.0 strtol.0 strtoul.0 system.0
+	realloc.0 strtol.0 strtoul.0 system.0
 
 MLINKS+=getenv.3 setenv.3 getenv.3 unsetenv.3 getenv.3 putenv.3
 MLINKS+=qsort.3 heapsort.3 qsort.3 mergesort.3
diff --git a/lib/libc/stdlib/atexit.c b/lib/libc/stdlib/atexit.c
index 9c4caed..bbf374e 100644
--- a/lib/libc/stdlib/atexit.c
+++ b/lib/libc/stdlib/atexit.c
@@ -35,13 +35,15 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)atexit.c	8.1 (Berkeley) 6/4/93";
+static char sccsid[] = "@(#)atexit.c	8.2 (Berkeley) 7/3/94";
 #endif /* LIBC_SCCS and not lint */
 
 #include <stddef.h>
 #include <stdlib.h>
 #include "atexit.h"
 
+struct atexit *__atexit;	/* points to head of LIFO stack */
+
 /*
  * Register a function to be performed at exit.
  */
diff --git a/lib/libc/stdlib/atexit.h b/lib/libc/stdlib/atexit.h
index 3067e8d..819151e 100644
--- a/lib/libc/stdlib/atexit.h
+++ b/lib/libc/stdlib/atexit.h
@@ -30,7 +30,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)atexit.h	8.1 (Berkeley) 6/4/93
+ *	@(#)atexit.h	8.2 (Berkeley) 7/3/94
  */
 
 /* must be at least 32 to guarantee ANSI conformance */
@@ -42,4 +42,4 @@ struct atexit {
 	void (*fns[ATEXIT_SIZE])();	/* the table itself */
 };
 
-struct atexit *__atexit;	/* points to head of LIFO stack */
+extern struct atexit *__atexit;	/* points to head of LIFO stack */
diff --git a/lib/libc/stdlib/getopt.3 b/lib/libc/stdlib/getopt.3
index 95ff6e6..39cc5de 100644
--- a/lib/libc/stdlib/getopt.3
+++ b/lib/libc/stdlib/getopt.3
@@ -29,16 +29,16 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"     @(#)getopt.3	8.4 (Berkeley) 4/19/94
+.\"     @(#)getopt.3	8.5 (Berkeley) 4/27/95
 .\"
-.Dd April 19, 1994
+.Dd April 27, 1995
 .Dt GETOPT 3
 .Os BSD 4.3
 .Sh NAME
 .Nm getopt
 .Nd get option character from command line argument list
 .Sh SYNOPSIS
-.Fd #include <stdlib.h>
+.Fd #include <unistd.h>
 .Vt extern char *optarg;
 .Vt extern int   optind;
 .Vt extern int   optopt;
@@ -120,8 +120,7 @@ must be reinitialized.
 The
 .Fn getopt
 function
-returns an
-.Dv EOF
+returns \-1
 when the argument list is exhausted, or a non-recognized
 option is encountered.
 The interpretation of options in the argument list may be cancelled
@@ -129,13 +128,11 @@ by the option
 .Ql --
 (double dash) which causes
 .Fn getopt
-to signal the end of argument processing and return an
-.Dv EOF . 
+to signal the end of argument processing and returns \-1.
 When all options have been processed (i.e., up to the first non-option
 argument),
 .Fn getopt
-returns
-.Dv EOF .
+returns \-1.
 .Sh DIAGNOSTICS
 If the
 .Fn getopt
@@ -177,7 +174,7 @@ extern int optind;
 int bflag, ch, fd;
 
 bflag = 0;
-while ((ch = getopt(argc, argv, "bf:")) != EOF)
+while ((ch = getopt(argc, argv, "bf:")) != -1)
 	switch(ch) {
 	case 'b':
 		bflag = 1;
@@ -202,6 +199,18 @@ The
 function appeared
 .Bx 4.3 .
 .Sh BUGS
+The
+.Fn getopt
+function was once specified to return
+.Dv EOF 
+instead of \-1.
+This was changed by
+.St -p1003.2-92
+to decouple 
+.Fn getopt
+from 
+.Pa <stdio.h> .
+.Pp
 A single dash
 .Dq Li -
 may be specified as an character in
@@ -219,8 +228,7 @@ It is provided for backward compatibility
 .Em only .
 By default, a single dash causes
 .Fn getopt
-to return
-.Dv EOF .
+to return \-1.
 This is, we believe, compatible with System V.
 .Pp
 It is also possible to handle digits as option letters.
@@ -237,7 +245,7 @@ The following code fragment works in most cases.
 int length;
 char *p;
 
-while ((c = getopt(argc, argv, "0123456789")) != EOF)
+while ((c = getopt(argc, argv, "0123456789")) != -1)
 	switch (c) {
 	case '0': case '1': case '2': case '3': case '4':
 	case '5': case '6': case '7': case '8': case '9':
diff --git a/lib/libc/stdlib/getopt.c b/lib/libc/stdlib/getopt.c
index 994d757..5dddf86 100644
--- a/lib/libc/stdlib/getopt.c
+++ b/lib/libc/stdlib/getopt.c
@@ -32,7 +32,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)getopt.c	8.2 (Berkeley) 4/2/94";
+static char sccsid[] = "@(#)getopt.c	8.3 (Berkeley) 4/27/95";
 #endif /* LIBC_SCCS and not lint */
 
 #include <stdio.h>
@@ -67,22 +67,22 @@ getopt(nargc, nargv, ostr)
 		optreset = 0;
 		if (optind >= nargc || *(place = nargv[optind]) != '-') {
 			place = EMSG;
-			return (EOF);
+			return (-1);
 		}
 		if (place[1] && *++place == '-') {	/* found "--" */
 			++optind;
 			place = EMSG;
-			return (EOF);
+			return (-1);
 		}
 	}					/* option letter okay? */
 	if ((optopt = (int)*place++) == (int)':' ||
 	    !(oli = strchr(ostr, optopt))) {
 		/*
 		 * if the user didn't specify '-' as an option,
-		 * assume it means EOF.
+		 * assume it means -1.
 		 */
 		if (optopt == (int)'-')
-			return (EOF);
+			return (-1);
 		if (!*place)
 			++optind;
 		if (opterr && *ostr != ':')
diff --git a/lib/libc/stdlib/radixsort.c b/lib/libc/stdlib/radixsort.c
index d211f3d..b932bf5 100644
--- a/lib/libc/stdlib/radixsort.c
+++ b/lib/libc/stdlib/radixsort.c
@@ -35,7 +35,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)radixsort.c	8.1 (Berkeley) 6/4/93";
+static char sccsid[] = "@(#)radixsort.c	8.2 (Berkeley) 4/28/95";
 #endif /* LIBC_SCCS and not lint */
 
 /*
@@ -132,7 +132,7 @@ sradixsort(a, n, tab, endch)
 #define swap(a, b, t)	t = a, a = b, b = t
 
 /* Unstable, in-place sort. */
-void
+static void
 r_sort_a(a, n, i, tr, endch)
 	const u_char **a;
 	int n, i;
@@ -223,7 +223,7 @@ r_sort_a(a, n, i, tr, endch)
 }
 
 /* Stable sort, requiring additional memory. */
-void
+static void
 r_sort_b(a, ta, n, i, tr, endch)
 	const u_char **a, **ta;
 	int n, i;
diff --git a/lib/libc/stdlib/random.c b/lib/libc/stdlib/random.c
index 18babba..7c76158 100644
--- a/lib/libc/stdlib/random.c
+++ b/lib/libc/stdlib/random.c
@@ -32,7 +32,7 @@
  */
 
 #if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)random.c	8.1 (Berkeley) 6/4/93";
+static char sccsid[] = "@(#)random.c	8.2 (Berkeley) 5/19/95";
 #endif /* LIBC_SCCS and not lint */
 
 #include <stdio.h>
@@ -76,6 +76,25 @@ static char sccsid[] = "@(#)random.c	8.1 (Berkeley) 6/4/93";
  * 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.
+ *
+ * Modified 28 December 1994 by Jacob S. Rosenberg.
+ * The following changes have been made:
+ * All references to the type u_int have been changed to unsigned long.
+ * All references to type int have been changed to type long.  Other
+ * cleanups have been made as well.  A warning for both initstate and
+ * setstate has been inserted to the effect that on Sparc platforms
+ * the 'arg_state' variable must be forced to begin on word boundaries.
+ * This can be easily done by casting a long integer array to char *.
+ * The overall logic has been left STRICTLY alone.  This software was
+ * tested on both a VAX and Sun SpacsStation with exactly the same
+ * results.  The new version and the original give IDENTICAL results.
+ * The new version is somewhat faster than the original.  As the
+ * documentation says:  "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."  For a buffer of
+ * 128 bytes, this new version runs about 19 percent faster and for a 16
+ * byte buffer it is about 5 percent faster.
  */
 
 /*
@@ -116,8 +135,8 @@ static char sccsid[] = "@(#)random.c	8.1 (Berkeley) 6/4/93";
  */
 #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 };
+static long degrees[MAX_TYPES] =	{ DEG_0, DEG_1, DEG_2, DEG_3, DEG_4 };
+static long seps [MAX_TYPES] =	{ SEP_0, SEP_1, SEP_2, SEP_3, SEP_4 };
 
 /*
  * Initially, everything is set up as if from:
@@ -171,9 +190,9 @@ static long *rptr = &randtbl[1];
  * the last element to see if the front and rear pointers have wrapped.
  */
 static long *state = &randtbl[1];
-static int rand_type = TYPE_3;
-static int rand_deg = DEG_3;
-static int rand_sep = SEP_3;
+static long rand_type = TYPE_3;
+static long rand_deg = DEG_3;
+static long rand_sep = SEP_3;
 static long *end_ptr = &randtbl[DEG_3 + 1];
 
 /*
@@ -190,14 +209,13 @@ static long *end_ptr = &randtbl[DEG_3 + 1];
  */
 void
 srandom(x)
-	u_int x;
+	unsigned long x;
 {
-	register int i, j;
+	register long i;
 
 	if (rand_type == TYPE_0)
 		state[0] = x;
 	else {
-		j = 1;
 		state[0] = x;
 		for (i = 1; i < rand_deg; i++)
 			state[i] = 1103515245 * state[i - 1] + 12345;
@@ -226,14 +244,19 @@ srandom(x)
  * setstate() so that it doesn't matter when initstate is called.
  *
  * Returns a pointer to the old state.
+ *
+ * Note: The Sparc platform requires that arg_state begin on a long
+ * word boundary; otherwise a bus error will occur. Even so, lint will
+ * complain about mis-alignment, but you should disregard these messages.
  */
 char *
 initstate(seed, arg_state, n)
-	u_int seed;			/* seed for R.N.G. */
+	unsigned long seed;		/* seed for R.N.G. */
 	char *arg_state;		/* pointer to state array */
-	int n;				/* # bytes of state info */
+	long n;				/* # bytes of state info */
 {
 	register char *ostate = (char *)(&state[-1]);
+	register long *long_arg_state = (long *) arg_state;
 
 	if (rand_type == TYPE_0)
 		state[-1] = rand_type;
@@ -241,7 +264,7 @@ initstate(seed, arg_state, n)
 		state[-1] = MAX_TYPES * (rptr - state) + rand_type;
 	if (n < BREAK_0) {
 		(void)fprintf(stderr,
-		    "random: not enough state (%d bytes); ignored.\n", n);
+		    "random: not enough state (%ld bytes); ignored.\n", n);
 		return(0);
 	}
 	if (n < BREAK_1) {
@@ -265,13 +288,13 @@ initstate(seed, arg_state, n)
 		rand_deg = DEG_4;
 		rand_sep = SEP_4;
 	}
-	state = &(((long *)arg_state)[1]);	/* first location */
+	state = (long *) (long_arg_state + 1); /* first location */
 	end_ptr = &state[rand_deg];	/* must set end_ptr before srandom */
 	srandom(seed);
 	if (rand_type == TYPE_0)
-		state[-1] = rand_type;
+		long_arg_state[0] = rand_type;
 	else
-		state[-1] = MAX_TYPES*(rptr - state) + rand_type;
+		long_arg_state[0] = MAX_TYPES * (rptr - state) + rand_type;
 	return(ostate);
 }
 
@@ -289,14 +312,18 @@ initstate(seed, arg_state, n)
  * setstate() with the same state as the current state.
  *
  * Returns a pointer to the old state information.
+ *
+ * Note: The Sparc platform requires that arg_state begin on a long
+ * word boundary; otherwise a bus error will occur. Even so, lint will
+ * complain about mis-alignment, but you should disregard these messages.
  */
 char *
 setstate(arg_state)
-	char *arg_state;
+	char *arg_state;		/* pointer to state array */
 {
-	register long *new_state = (long *)arg_state;
-	register int type = new_state[0] % MAX_TYPES;
-	register int rear = new_state[0] / MAX_TYPES;
+	register long *new_state = (long *) arg_state;
+	register long type = new_state[0] % MAX_TYPES;
+	register long rear = new_state[0] / MAX_TYPES;
 	char *ostate = (char *)(&state[-1]);
 
 	if (rand_type == TYPE_0)
@@ -317,7 +344,7 @@ setstate(arg_state)
 		(void)fprintf(stderr,
 		    "random: state info corrupted; not changed.\n");
 	}
-	state = &new_state[1];
+	state = (long *) (new_state + 1);
 	if (rand_type != TYPE_0) {
 		rptr = &state[rear];
 		fptr = &state[(rear + rand_sep) % rand_deg];
@@ -346,18 +373,28 @@ setstate(arg_state)
 long
 random()
 {
-	long i;
+	register long i;
+	register long *f, *r;
 
-	if (rand_type == TYPE_0)
-		i = state[0] = (state[0] * 1103515245 + 12345) & 0x7fffffff;
-	else {
-		*fptr += *rptr;
-		i = (*fptr >> 1) & 0x7fffffff;	/* chucking least random bit */
-		if (++fptr >= end_ptr) {
-			fptr = state;
-			++rptr;
-		} else if (++rptr >= end_ptr)
-			rptr = state;
+	if (rand_type == TYPE_0) {
+		i = state[0];
+		state[0] = i = (i * 1103515245 + 12345) & 0x7fffffff;
+	} else {
+		/*
+		 * Use local variables rather than static variables for speed.
+		 */
+		f = fptr; r = rptr;
+		*f += *r;
+		i = (*f >> 1) & 0x7fffffff;	/* chucking least random bit */
+		if (++f >= end_ptr) {
+			f = state;
+			++r;
+		}
+		else if (++r >= end_ptr) {
+			r = state;
+		}
+
+		fptr = f; rptr = r;
 	}
 	return(i);
 }