* hashtab.c, partition.c, xmemdup.c: Include string.h

	if HAVE_STRING_H.
	* pexecute.c, xexit.c: Include stdlib.h if HAVE_STDLIB_H.
	* objalloc.c: Include config.h.  Include stdlib.h and don't
	declare malloc or free if HAVE_STDLIB_H.
	* strerror.c, strsignal.c: Include stdlib.h if HAVE_STDLIB_H,
	else declare malloc without prototype.  Include string.h if
	HAVE_STRING_H, else declare memset without prototype.  Don't
	include stddef.h.

	* sort.c: Bring over from GCC.

10 files changed, 245 insertions, 16 deletions

diff --git a/libiberty/ChangeLog b/libiberty/ChangeLog
index 316f6a223c..8e63f17803 100644
--- a/libiberty/ChangeLog
+++ b/libiberty/ChangeLog
@@ -1,3 +1,17 @@
+2000-05-29  Zack Weinberg  <zack@wolery.cumb.org>
+
+	* hashtab.c, partition.c, xmemdup.c: Include string.h
+	if HAVE_STRING_H.
+	* pexecute.c, xexit.c: Include stdlib.h if HAVE_STDLIB_H.
+	* objalloc.c: Include config.h.  Include stdlib.h and don't
+	declare malloc or free if HAVE_STDLIB_H.
+	* strerror.c, strsignal.c: Include stdlib.h if HAVE_STDLIB_H,
+	else declare malloc without prototype.  Include string.h if
+	HAVE_STRING_H, else declare memset without prototype.  Don't
+	include stddef.h.
+
+	* sort.c: Bring over from GCC.
+
 2000-05-26  Alexandre Oliva  <aoliva@cygnus.com>
 
 	* Makefile.in (maintainer-clean-subdir): Fix handling of empty
diff --git a/libiberty/hashtab.c b/libiberty/hashtab.c
index 16c5d3e4b1..6ae34aab0f 100644
--- a/libiberty/hashtab.c
+++ b/libiberty/hashtab.c
@@ -41,6 +41,10 @@ Boston, MA 02111-1307, USA.  */
 #include <stdlib.h>
 #endif
 
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
 #include <stdio.h>
 
 #include "libiberty.h"
diff --git a/libiberty/objalloc.c b/libiberty/objalloc.c
index 57754a8610..50995691e3 100644
--- a/libiberty/objalloc.c
+++ b/libiberty/objalloc.c
@@ -18,6 +18,8 @@ Foundation, 59 Temple Place - Suite 330,
 Boston, MA 02111-1307, USA.  */
 
 #include "ansidecl.h"
+#include "config.h"
+
 #include "objalloc.h"
 
 /* Get a definition for NULL.  */
@@ -33,11 +35,16 @@ Boston, MA 02111-1307, USA.  */
 #include <stddef.h>
 #endif
 
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#else
 /* For systems with larger pointers than ints, this must be declared.  */
 extern PTR malloc PARAMS ((size_t));
 extern void free PARAMS ((PTR));
 #endif
 
+#endif
+
 /* These routines allocate space for an object.  Freeing allocated
    space may or may not free all more recently allocated space.
 
diff --git a/libiberty/partition.c b/libiberty/partition.c
index c1d584774b..52fb128d7b 100644
--- a/libiberty/partition.c
+++ b/libiberty/partition.c
@@ -27,6 +27,10 @@
 #include <stdlib.h>
 #endif
 
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
 #include "libiberty.h"
 #include "partition.h"
 
diff --git a/libiberty/pexecute.c b/libiberty/pexecute.c
index 56ddec78dd..f1aea9db7f 100644
--- a/libiberty/pexecute.c
+++ b/libiberty/pexecute.c
@@ -35,6 +35,9 @@ Boston, MA 02111-1307, USA.  */
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
 #define ISSPACE (x) isspace(x)
 #ifdef HAVE_SYS_WAIT_H
 #include <sys/wait.h>
diff --git a/libiberty/sort.c b/libiberty/sort.c
new file mode 100644
index 0000000000..da2d660b6f
--- /dev/null
+++ b/libiberty/sort.c
@@ -0,0 +1,185 @@
+/* Sorting algorithms.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   Contributed by Mark Mitchell <mark@codesourcery.com>.
+
+This file is part of GNU CC.
+   
+GNU CC is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU CC 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
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU CC; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "libiberty.h"
+#include "sort.h"
+#include <limits.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#ifndef UCHAR_MAX
+#define UCHAR_MAX ((unsigned char)(-1))
+#endif
+
+/* POINTERS and WORK are both arrays of N pointers.  When this
+   function returns POINTERS will be sorted in ascending order.  */
+
+void sort_pointers (n, pointers, work)
+     size_t n;
+     void **pointers;
+     void **work;
+{
+  /* The type of a single digit.  This can be any unsigned integral
+     type.  When changing this, DIGIT_MAX should be changed as 
+     well.  */
+  typedef unsigned char digit_t;
+
+  /* The maximum value a single digit can have.  */
+#define DIGIT_MAX (UCHAR_MAX + 1)
+
+  /* The Ith entry is the number of elements in *POINTERSP that have I
+     in the digit on which we are currently sorting.  */
+  unsigned int count[DIGIT_MAX];
+  /* Nonzero if we are running on a big-endian machine.  */
+  int big_endian_p;
+  size_t i;
+  size_t j;
+
+  /* The algorithm used here is radix sort which takes time linear in
+     the number of elements in the array.  */
+
+  /* The algorithm here depends on being able to swap the two arrays
+     an even number of times.  */
+  if ((sizeof (void *) / sizeof (digit_t)) % 2 != 0)
+    abort ();
+
+  /* Figure out the endianness of the machine.  */
+  for (i = 0, j = 0; i < sizeof (size_t); ++i)
+    {
+      j *= (UCHAR_MAX + 1);
+      j += i;
+    }
+  big_endian_p = (((char *)&j)[0] == 0);
+
+  /* Move through the pointer values from least significant to most
+     significant digits.  */
+  for (i = 0; i < sizeof (void *) / sizeof (digit_t); ++i)
+    {
+      digit_t *digit;
+      digit_t *bias;
+      digit_t *top;
+      unsigned int *countp;
+      void **pointerp;
+
+      /* The offset from the start of the pointer will depend on the
+	 endianness of the machine.  */
+      if (big_endian_p)
+	j = sizeof (void *) / sizeof (digit_t) - i;
+      else
+	j = i;
+	
+      /* Now, perform a stable sort on this digit.  We use counting
+	 sort.  */
+      memset (count, 0, DIGIT_MAX * sizeof (unsigned int));
+
+      /* Compute the address of the appropriate digit in the first and
+	 one-past-the-end elements of the array.  On a little-endian
+	 machine, the least-significant digit is closest to the front.  */
+      bias = ((digit_t *) pointers) + j;
+      top = ((digit_t *) (pointers + n)) + j;
+
+      /* Count how many there are of each value.  At the end of this
+	 loop, COUNT[K] will contain the number of pointers whose Ith
+	 digit is K.  */
+      for (digit = bias; 
+	   digit < top; 
+	   digit += sizeof (void *) / sizeof (digit_t))
+	++count[*digit];
+
+      /* Now, make COUNT[K] contain the number of pointers whose Ith
+	 digit is less than or equal to K.  */
+      for (countp = count + 1; countp < count + DIGIT_MAX; ++countp)
+	*countp += countp[-1];
+
+      /* Now, drop the pointers into their correct locations.  */
+      for (pointerp = pointers + n - 1; pointerp >= pointers; --pointerp)
+	work[--count[((digit_t *) pointerp)[j]]] = *pointerp;
+
+      /* Swap WORK and POINTERS so that POINTERS contains the sorted
+	 array.  */
+      pointerp = pointers;
+      pointers = work;
+      work = pointerp;
+    }
+}
+
+/* Everything below here is a unit test for the routines in this
+   file.  */
+
+#ifdef UNIT_TEST
+
+#include <stdio.h>
+
+void *xmalloc (n)
+     size_t n;
+{
+  return malloc (n);
+}
+
+int main (int argc, char **argv)
+{
+  int k;
+  int result;
+  size_t i;
+  void **pointers;
+  void **work;
+
+  if (argc > 1)
+    k = atoi (argv[1]);
+  else
+    k = 10;
+
+  pointers = xmalloc (k * sizeof (void *));
+  work = xmalloc (k * sizeof (void *));
+
+  for (i = 0; i < k; ++i)
+    {
+      pointers[i] = (void *) random ();
+      printf ("%x\n", pointers[i]);
+    }
+
+  sort_pointers (k, pointers, work);
+
+  printf ("\nSorted\n\n");
+
+  result = 0;
+
+  for (i = 0; i < k; ++i)
+    {
+      printf ("%x\n", pointers[i]);
+      if (i > 0 && (char*) pointers[i] < (char*) pointers[i - 1])
+	result = 1;
+    }
+
+  free (pointers);
+  free (work);
+
+  return result;
+}
+
+#endif
diff --git a/libiberty/strerror.c b/libiberty/strerror.c
index 644cc75462..0dd2220cd7 100644
--- a/libiberty/strerror.c
+++ b/libiberty/strerror.c
@@ -25,14 +25,17 @@
 
 /*  Routines imported from standard C runtime libraries. */
 
-#ifdef __STDC__
-#include <stddef.h>
-extern void *malloc (size_t size);				/* 4.10.3.3 */
-extern void *memset (void *s, int c, size_t n);			/* 4.11.6.1 */
-#else	/* !__STDC__ */
-extern char *malloc ();		/* Standard memory allocater */
-extern char *memset ();
-#endif	/* __STDC__ */
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#else
+extern PTR malloc ();
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+extern PTR memset ();
+#endif
 
 #ifndef MAX
 #  define MAX(a,b) ((a) > (b) ? (a) : (b))
diff --git a/libiberty/strsignal.c b/libiberty/strsignal.c
index c7bb10c441..5625323b71 100644
--- a/libiberty/strsignal.c
+++ b/libiberty/strsignal.c
@@ -23,14 +23,17 @@
 
 /*  Routines imported from standard C runtime libraries. */
 
-#ifdef __STDC__
-#include <stddef.h>
-extern void *malloc (size_t size);				/* 4.10.3.3 */
-extern void *memset (void *s, int c, size_t n);			/* 4.11.6.1 */
-#else	/* !__STDC__ */
-extern char *malloc ();		/* Standard memory allocater */
-extern char *memset ();
-#endif	/* __STDC__ */
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#else
+extern PTR malloc ();
+#endif
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+extern PTR memset ();
+#endif
 
 /* Undefine the macro we used to hide the definition of sys_siglist
    found in the system header files.  */
diff --git a/libiberty/xexit.c b/libiberty/xexit.c
index 431bbe0299..7aa52ac759 100644
--- a/libiberty/xexit.c
+++ b/libiberty/xexit.c
@@ -21,6 +21,9 @@ Boston, MA 02111-1307, USA.  */
 #include "libiberty.h"
 
 #include <stdio.h>
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
 
 /* This variable is set by xatexit if it is called.  This way, xmalloc
    doesn't drag xatexit into the link.  */
diff --git a/libiberty/xmemdup.c b/libiberty/xmemdup.c
index f780041aa1..fdb17a547f 100644
--- a/libiberty/xmemdup.c
+++ b/libiberty/xmemdup.c
@@ -9,6 +9,9 @@
 #include "libiberty.h"
 
 #include <sys/types.h> /* For size_t. */
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
 
 PTR
 xmemdup (input, copy_size, alloc_size)