initial import

18 files changed, 1522 insertions, 0 deletions

diff --git a/string/.cvsignore b/string/.cvsignore
new file mode 100644
index 0000000000..1f69fd919a
--- /dev/null
+++ b/string/.cvsignore
@@ -0,0 +1,4 @@
+*.gz *.Z *.tar *.tgz
+=*
+TODO COPYING* AUTHORS copyr-* copying.*
+glibc-*
diff --git a/string/Makefile b/string/Makefile
new file mode 100644
index 0000000000..a4ba83b465
--- /dev/null
+++ b/string/Makefile
@@ -0,0 +1,39 @@
+# Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+
+# 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., 675 Mass Ave,
+# Cambridge, MA 02139, USA.
+
+#
+#	Sub-makefile for string portion of library.
+#
+subdir	:= string
+
+headers	:= string.h strings.h memory.h endian.h bytesex.h
+
+routines	:= strcat strchr strcmp strcoll strcpy strcspn strdup	\
+		   strerror _strerror strlen strncat strncmp strncpy 	\
+		   strrchr strpbrk strsignal strspn strstr strtok	\
+		   strxfrm memchr memcmp memmove memset			\
+		   bcopy bzero ffs stpcpy stpncpy			\
+		   strcasecmp strncase					\
+		   memccpy memcpy wordcopy strsep			\
+		   swab strfry memfrob memmem
+
+tests		:= tester testcopy test-ffs
+distribute	:= memcopy.h
+
+
+include ../Rules
diff --git a/string/endian.h b/string/endian.h
new file mode 100644
index 0000000000..8871ff54d4
--- /dev/null
+++ b/string/endian.h
@@ -0,0 +1,43 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifndef	_ENDIAN_H
+#define	_ENDIAN_H	1
+#include <features.h>
+
+/* Definitions for byte order, according to significance of bytes, from low
+   addresses to high addresses.  The value is what you get by putting '4'
+   in the most significant byte, '3' in the second most significant byte,
+   '2' in the second least significant byte, and '1' in the least
+   significant byte.  */
+
+#define	__LITTLE_ENDIAN	1234
+#define	__BIG_ENDIAN	4321
+#define	__PDP_ENDIAN	3412
+
+/* This file defines `__BYTE_ORDER' for the particular machine.  */
+#include <bytesex.h>
+
+#ifdef	__USE_BSD
+#define	LITTLE_ENDIAN	__LITTLE_ENDIAN
+#define	BIG_ENDIAN	__BIG_ENDIAN
+#define	PDP_ENDIAN	__PDP_ENDIAN
+#define	BYTE_ORDER	__BYTE_ORDER
+#endif
+
+#endif	/* endian.h */
diff --git a/string/memfrob.c b/string/memfrob.c
new file mode 100644
index 0000000000..cf3422bdc7
--- /dev/null
+++ b/string/memfrob.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <string.h>
+
+PTR
+DEFUN(memfrob, (s, n),
+      PTR s AND size_t n)
+{
+  register char *p = (char *) s;
+
+  while (n-- > 0)
+    *p++ ^= 42;
+
+  return s;
+}
diff --git a/string/memory.h b/string/memory.h
new file mode 100644
index 0000000000..901a291ea3
--- /dev/null
+++ b/string/memory.h
@@ -0,0 +1,34 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/*
+ * SVID
+ */
+
+#ifndef	_MEMORY_H
+
+#define	_MEMORY_H	1
+#include <features.h>
+
+
+#ifndef	_STRING_H
+#include <string.h>
+#endif	/* string.h  */
+
+
+#endif	/* memory.h  */
diff --git a/string/strcoll.c b/string/strcoll.c
new file mode 100644
index 0000000000..ed4b35f80d
--- /dev/null
+++ b/string/strcoll.c
@@ -0,0 +1,70 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <localeinfo.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/* Compare S1 and S2, returning less than, equal to or
+   greater than zero if the collated form of S1 is lexiographically
+   less than, equal to or greater than the collated form of S2.  */
+int
+DEFUN(strcoll, (s1, s2), CONST char *s1 AND CONST char *s2)
+{
+  if (_collate_info == NULL || _collate_info->values == NULL)
+    return strcmp(s1, s2);
+  else
+    {
+      CONST unsigned char *CONST values = _collate_info->values;
+      CONST unsigned char *CONST offsets = _collate_info->offsets;
+
+      while (*s1 != '\0' && *s2 != '\0')
+	{
+	  CONST unsigned char c1 = *s1++, c2 = *s2++;
+	  CONST unsigned char v1 = values[c1], v2 = values[c2];
+	  CONST unsigned char o1 = offsets[c1], o2 = offsets[c2];
+
+	  if (v1 == UCHAR_MAX && o1 == 0)
+	    /* This is a non-collating element.  Skip it.  */
+	    --s2;
+	  else if (v2 == UCHAR_MAX && o2 == 0)
+	    --s1;
+	  else if (v1 == UCHAR_MAX && o1 == CHAR_MAX)
+	    {
+	      /* This element collates lower than anything else.  */
+	      if (v2 != UCHAR_MAX || o2 != CHAR_MAX)
+		return -1;
+	    }
+	  else if (v2 == UCHAR_MAX && o2 == CHAR_MAX)
+	    return 1;
+	  else if (v1 != v2)
+	    return v1 - v2;
+	  else if (o1 != o2)
+	    return o1 - o2;
+	}
+
+      if (*s1 == '\0')
+	return *s2 == '\0' ? 0 : -1;
+      else if (*s2 == '\0')
+	return 1;
+      return 0;
+    }
+}
diff --git a/string/strdup.c b/string/strdup.c
new file mode 100644
index 0000000000..2c8aff2796
--- /dev/null
+++ b/string/strdup.c
@@ -0,0 +1,38 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/* Duplicate S, returning an identical malloc'd string.  */
+char *
+DEFUN(strdup, (s), CONST char *s)
+{
+  size_t len = strlen(s) + 1;
+  PTR new = malloc(len);
+
+  if (new == NULL)
+    return NULL;
+
+  memcpy(new, (PTR) s, len);
+
+  return (char *) new;
+}
diff --git a/string/strerror.c b/string/strerror.c
new file mode 100644
index 0000000000..67759703c4
--- /dev/null
+++ b/string/strerror.c
@@ -0,0 +1,33 @@
+/* Copyright (C) 1991, 1993, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stdio.h>
+#include <string.h>
+
+extern char *_strerror_internal __P ((int, char buf[1024]));
+
+/* Return a string descibing the errno code in ERRNUM.
+   The storage is good only until the next call to strerror.
+   Writing to the storage causes undefined behavior.  */
+char *
+DEFUN(strerror, (errnum), int errnum)
+{
+  static char buf[1024];
+  return _strerror_internal (errnum, buf);
+}
diff --git a/string/strfry.c b/string/strfry.c
new file mode 100644
index 0000000000..c885f66c68
--- /dev/null
+++ b/string/strfry.c
@@ -0,0 +1,46 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+
+char *
+DEFUN(strfry, (string), char *string)
+{
+  static int init = 0;
+  size_t len, i;
+
+  if (!init)
+    {
+      srand (time ((time_t *) NULL));
+      init = 1;
+    }
+
+  len = strlen (string);
+  for (i = 0; i < len; ++i)
+    {
+      size_t j = rand () % len;
+      char c = string[i];
+      string[i] = string[j];
+      string[j] = c;
+    }
+
+  return string;
+}
diff --git a/string/string.h b/string/string.h
new file mode 100644
index 0000000000..905d727f18
--- /dev/null
+++ b/string/string.h
@@ -0,0 +1,186 @@
+/* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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, 1992 Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/*
+ *	ANSI Standard: 4.11 STRING HANDLING	<string.h>
+ */
+
+#ifndef	_STRING_H
+
+#define	_STRING_H	1
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* Get size_t and NULL from <stddef.h>.  */
+#define	__need_size_t
+#define	__need_NULL
+#include <stddef.h>
+
+
+/* Copy N bytes of SRC to DEST.  */
+extern __ptr_t memcpy __P ((__ptr_t __dest, __const __ptr_t __src,
+			    size_t __n));
+/* Copy N bytes of SRC to DEST, guaranteeing
+   correct behavior for overlapping strings.  */
+extern __ptr_t memmove __P ((__ptr_t __dest, __const __ptr_t __src,
+			     size_t __n));
+
+/* Copy no more than N bytes of SRC to DEST, stopping when C is found.
+   Return the position in DEST one byte past where C was copied,
+   or NULL if C was not found in the first N bytes of SRC.  */
+extern __ptr_t __memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
+			       int __c, size_t __n));
+#if defined (__USE_SVID) || defined (__USE_BSD)
+extern __ptr_t memccpy __P ((__ptr_t __dest, __const __ptr_t __src,
+			     int __c, size_t __n));
+#ifdef	__OPTIMIZE__
+#define	memccpy(dest, src, c, n) __memccpy((dest), (src), (c), (n))
+#endif /* Optimizing.  */
+#endif /* SVID.  */
+
+
+/* Set N bytes of S to C.  */
+extern __ptr_t memset __P ((__ptr_t __s, int __c, size_t __n));
+
+/* Compare N bytes of S1 and S2.  */
+extern int memcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2,
+			size_t __n));
+
+/* Search N bytes of S for C.  */
+extern __ptr_t memchr __P ((__const __ptr_t __s, int __c, size_t __n));
+
+
+/* Copy SRC to DEST.  */
+extern char *strcpy __P ((char *__dest, __const char *__src));
+/* Copy no more than N characters of SRC to DEST.  */
+extern char *strncpy __P ((char *__dest, __const char *__src, size_t __n));
+
+/* Append SRC onto DEST.  */
+extern char *strcat __P ((char *__dest, __const char *__src));
+/* Append no more than N characters from SRC onto DEST.  */
+extern char *strncat __P ((char *__dest, __const char *__src, size_t __n));
+
+/* Compare S1 and S2.  */
+extern int strcmp __P ((__const char *__s1, __const char *__s2));
+/* Compare N characters of S1 and S2.  */
+extern int strncmp __P ((__const char *__s1, __const char *__s2, size_t __n));
+
+/* Compare the collated forms of S1 and S2.  */
+extern int strcoll __P ((__const char *__s1, __const char *__s2));
+/* Put a transformation of SRC into no more than N bytes of DEST.  */
+extern size_t strxfrm __P ((char *__dest, __const char *__src, size_t __n));
+
+#if defined (__USE_SVID) || defined (__USE_BSD)
+/* Duplicate S, returning an identical malloc'd string.  */
+extern char *strdup __P ((__const char *__s));
+#endif
+
+/* Find the first occurrence of C in S.  */
+extern char *strchr __P ((__const char *__s, int __c));
+/* Find the last occurrence of C in S.  */
+extern char *strrchr __P ((__const char *__s, int __c));
+
+/* Return the length of the initial segment of S which
+   consists entirely of characters not in REJECT.  */
+extern size_t strcspn __P ((__const char *__s, __const char *__reject));
+/* Return the length of the initial segment of S which
+   consists entirely of characters in ACCEPT.  */
+extern size_t strspn __P ((__const char *__s, __const char *__accept));
+/* Find the first occurence in S of any character in ACCEPT.  */
+extern char *strpbrk __P ((__const char *__s, __const char *__accept));
+/* Find the first occurence of NEEDLE in HAYSTACK.  */
+extern char *strstr __P ((__const char *__haystack, __const char *__needle));
+/* Divide S into tokens separated by characters in DELIM.  */
+extern char *strtok __P ((char *__s, __const char *__delim));
+
+#ifdef	__USE_GNU
+/* Find the first occurence of NEEDLE in HAYSTACK.
+   NEEDLE is NEEDLELEN bytes long;
+   HAYSTACK is HAYSTACKLEN bytes long.  */
+extern __ptr_t memmem __P ((__const __ptr_t __haystack, size_t __haystacklen,
+			    __const __ptr_t __needle, size_t __needlelen));
+#endif
+
+/* Return the length of S.  */
+extern size_t strlen __P ((__const char *__s));
+
+/* Return a string describing the meaning of the errno code in ERRNUM.  */
+extern char *strerror __P ((int __errnum));
+
+#ifdef	__USE_BSD
+/* Find the first occurrence of C in S (same as strchr).  */
+extern char *index __P ((__const char *__s, int __c));
+
+/* Find the last occurrence of C in S (same as strrchr).  */
+extern char *rindex __P ((__const char *__s, int __c));
+
+/* Copy N bytes of SRC to DEST (like memmove, but args reversed).  */
+extern void bcopy __P ((__const __ptr_t __src, __ptr_t __dest, size_t __n));
+
+/* Set N bytes of S to 0.  */
+extern void bzero __P ((__ptr_t __s, size_t __n));
+
+/* Compare N bytes of S1 and S2 (same as memcmp).  */
+extern int bcmp __P ((__const __ptr_t __s1, __const __ptr_t __s2, size_t __n));
+
+/* Return the position of the first bit set in I, or 0 if none are set.
+   The least-significant bit is position 1, the most-significant 32.  */
+extern int ffs __P ((int __i));
+
+/* Compare S1 and S2, ignoring case.  */
+extern int strcasecmp __P ((__const char *__s1, __const char *__s2));
+
+/* Return the next DELIM-delimited token from *STRINGP,
+   terminating it with a '\0', and update *STRINGP to point past it.  */
+extern char *strsep __P ((char **__stringp, __const char *__delim));
+#endif
+
+/* Copy no more than N characters of SRC to DEST, returning the address of
+   the last character written into DEST.  */
+extern char *__stpncpy __P ((char *__dest, __const char *__src, size_t __n));
+
+#ifdef	__USE_GNU
+/* Compare no more than N chars of S1 and S2, ignoring case.  */
+extern int strncasecmp __P ((__const char *__s1, __const char *__s2,
+			     size_t __n));
+
+/* Return a string describing the meaning of the signal number in SIG.  */
+extern char *strsignal __P ((int __sig));
+
+/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST.  */
+extern char *stpcpy __P ((char *__dest, __const char *__src));
+
+/* Copy no more than N characters of SRC to DEST, returning the address of
+   the last character written into DEST.  */
+extern char *stpncpy __P ((char *__dest, __const char *__src, size_t __n));
+
+#ifdef __OPTIMIZE__
+#define stpncpy(dest, src, n)	__stpncpy ((dest), (src), (n))
+#endif
+
+/* Sautee STRING briskly.  */
+extern char *strfry __P ((char *__string));
+
+/* Frobnicate N bytes of S.  */
+extern __ptr_t memfrob __P ((__ptr_t __s, size_t __n));
+#endif
+
+__END_DECLS
+
+#endif /* string.h  */
diff --git a/string/strings.h b/string/strings.h
new file mode 100644
index 0000000000..235c3e5c9e
--- /dev/null
+++ b/string/strings.h
@@ -0,0 +1,32 @@
+/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+/* Compatibility with BSD string(3).  */
+
+#ifndef	_STRINGS_H
+
+#define	_STRINGS_H	1
+#include <features.h>
+
+
+#ifndef	_STRING_H
+#include <string.h>
+#endif	/* string.h  */
+
+
+#endif	/* strings.h  */
diff --git a/string/strsignal.c b/string/strsignal.c
new file mode 100644
index 0000000000..c2c8835a19
--- /dev/null
+++ b/string/strsignal.c
@@ -0,0 +1,49 @@
+/* Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+
+
+#ifndef	HAVE_GNU_LD
+#define	_sys_siglist	sys_siglist
+#endif
+
+/* Defined in , 1992siglist.c.  */
+extern CONST char *CONST _sys_siglist[];
+
+
+/* Return a string describing the meaning of the signal number SIGNUM.  */
+char *
+DEFUN(strsignal, (signum), int signum)
+{
+  if (signum < 0 || signum > NSIG)
+    {
+      static char unknown_signal[] = "Unknown signal 000000000000000000";
+      static char fmt[] = "Unknown signal%d";
+      size_t len = sprintf(unknown_signal, fmt, signum);
+      if (len < sizeof(fmt) - 2)
+	return NULL;
+      unknown_signal[len] = '\0';
+      return unknown_signal;
+    }
+
+  return (char *) _sys_siglist[signum];
+}
diff --git a/string/strtok.c b/string/strtok.c
new file mode 100644
index 0000000000..0b95084f53
--- /dev/null
+++ b/string/strtok.c
@@ -0,0 +1,73 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <string.h>
+
+
+static char *olds = NULL;
+
+/* Parse S into tokens separated by characters in DELIM.
+   If S is NULL, the last string strtok() was called with is
+   used.  For example:
+	char s[] = "-abc=-def";
+	x = strtok(s, "-");		// x = "abc"
+	x = strtok(NULL, "=-");		// x = "def"
+	x = strtok(NULL, "=");		// x = NULL
+		// s = "abc\0-def\0"
+*/
+char *
+DEFUN(strtok, (s, delim),
+      register char *s AND register CONST char *delim)
+{
+  char *token;
+
+  if (s == NULL)
+    {
+      if (olds == NULL)
+	{
+	  errno = EINVAL;
+	  return NULL;
+	}
+      else
+	s = olds;
+    }
+
+  /* Scan leading delimiters.  */
+  s += strspn(s, delim);
+  if (*s == '\0')
+    {
+      olds = NULL;
+      return NULL;
+    }
+
+  /* Find the end of the token.  */
+  token = s;
+  s = strpbrk(token, delim);
+  if (s == NULL)
+    /* This token finishes the string.  */
+    olds = NULL;
+  else
+    {
+      /* Terminate the token and make OLDS point past it.  */
+      *s = '\0';
+      olds = s + 1;
+    }
+  return token;
+}
diff --git a/string/strxfrm.c b/string/strxfrm.c
new file mode 100644
index 0000000000..cdca280e78
--- /dev/null
+++ b/string/strxfrm.c
@@ -0,0 +1,76 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <localeinfo.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+/* Transform SRC into a form such that the result of strcmp
+   on two strings that have been transformed by strxfrm is
+   the same as the result of strcoll on the two strings before
+   their transformation.  The transformed string is put in at
+   most N characters of DEST and its length is returned.  */
+size_t
+DEFUN(strxfrm, (dest, src, n), char *dest AND CONST char *src AND size_t n)
+{
+  CONST unsigned char *CONST values
+    = _collate_info != NULL ? _collate_info->values : NULL;
+  CONST unsigned char *CONST offsets
+    = _collate_info != NULL ? _collate_info->offsets : NULL;
+  register size_t done = 0;
+
+  while (*src != '\0')
+    {
+      CONST unsigned char c = *src++;
+
+      ++done;
+      if (offsets != NULL && offsets[c] != 0)
+	{
+	  ++done;
+	  if (offsets[c] == CHAR_MAX)
+	    ++done;
+	}
+      if (done < n && dest != NULL)
+	{
+	  if (values == NULL)
+	    *dest++ = c;
+	  else if (values[c] == UCHAR_MAX && offsets[c] == 0)
+	    /* This is a non-collating element.  Skip it.  */
+	    ;
+	  else if (values[c] == UCHAR_MAX && offsets[c] == CHAR_MAX)
+	    {
+	      /* This element collates lower than anything else.  */
+	      *dest++ = '\001';
+	      *dest++ = '\001';
+	      *dest++ = '\001';
+	    }
+	  else
+	    {
+	      *dest++ = values[c];
+	      *dest++ = offsets[c];
+	    }
+	}
+    }
+
+  if (dest != NULL)
+    *dest = '\0';
+  return done;
+}
diff --git a/string/swab.c b/string/swab.c
new file mode 100644
index 0000000000..350d9a3303
--- /dev/null
+++ b/string/swab.c
@@ -0,0 +1,32 @@
+/* Copyright (C) 1992 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stddef.h>
+
+void
+DEFUN(swab, (from, to, n),
+      CONST char *from AND char *to AND size_t n)
+{
+  while (n > 1)
+    {
+      CONST char b0 = from[--n], b1 = from[--n];
+      to[n] = b0;
+      to[n + 1] = b1;
+    }
+}
diff --git a/string/test-ffs.c b/string/test-ffs.c
new file mode 100644
index 0000000000..bbe62786e0
--- /dev/null
+++ b/string/test-ffs.c
@@ -0,0 +1,54 @@
+/* Copyright (C) 1994 Free Software Foundation, Inc.
+   Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil),
+     On-Line Applications Research Corporation.
+
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+int
+DEFUN(main, (argc, argv),
+      int argc AND char **argv)
+{
+  int failures = 0;
+  int i;
+  void try (int value, int expected)
+    {
+      if (ffs (value) != expected)
+	{
+	  fprintf (stderr, "%#x expected %d got %d\n",
+		   value, expected, ffs (value));
+	  ++failures;
+	}
+    }
+
+  try (0, 0);
+  for (i=0 ; i<32 ; i++)
+    try (1<<i, i+1);
+  try (0x80008000, 16);
+
+  if (failures)
+    printf ("Test FAILED!  %d failure%s.\n", failures, &"s"[failures == 1]);
+  else
+    puts ("Test succeeded.");
+
+  exit (failures);
+}
diff --git a/string/testcopy.c b/string/testcopy.c
new file mode 100644
index 0000000000..9ec5c7761c
--- /dev/null
+++ b/string/testcopy.c
@@ -0,0 +1,111 @@
+/* Copyright (C) 1990, 1991, 1992 Free Software Foundation, Inc.
+   Contributed by Torbjorn Granlund (tege@sics.se).
+
+This file is part of the GNU C Library.
+
+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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <malloc.h>
+
+int
+DEFUN(main, (argc, argv),
+      int argc AND char **argv)
+{
+  char *mem, *memp;
+  char *rand_mem;
+  char *lo_around, *hi_around;
+  int size, max_size;
+  int src_off, dst_off;
+  int i;
+  int space_around = 10;
+
+  max_size = 256;
+
+  mem = malloc (max_size + 2 * max_size + 2 * space_around);
+  rand_mem = malloc (max_size);
+  lo_around = malloc (space_around);
+  hi_around = malloc (space_around);
+  memp = mem + space_around;
+
+  /* Fill RAND_MEM with random bytes, each non-zero.  */
+  for (i = 0; i < max_size; i++)
+    {
+      int x;
+      do
+	x = random ();
+      while (x == 0);
+      rand_mem[i] = x;
+    }
+
+  for (size = 0; size < max_size; size++)
+    {
+      printf("phase %d\n", size);
+      for (src_off = 0; src_off <= 16; src_off++)
+	{
+	  for (dst_off = 0; dst_off <= 16; dst_off++)
+	    {
+	      /* Put zero around the intended destination, to check
+		 that it's not clobbered.  */
+	      for (i = 1; i < space_around; i++)
+		{
+		  memp[dst_off - i] = 0;
+		  memp[dst_off + size - 1 + i] = 0;
+		}
+
+	      /* Fill the source area with known contents.  */
+	      for (i = 0; i < size; i++)
+		memp[src_off + i] = rand_mem[i];
+
+	      /* Remember the contents around the destination area.
+		 (It might not be what we wrote some lines above, since
+		 the src area and the dst area overlap.)  */
+	      for (i = 1; i < space_around; i++)
+		{
+		  lo_around[i] = memp[dst_off - i];
+		  hi_around[i] = memp[dst_off + size - 1 + i];
+		}
+
+	      memmove (memp + dst_off, memp + src_off, size);
+
+	      /* Check that the destination area has the same
+		 contents we wrote to the source area.  */
+	      for (i = 0; i < size; i++)
+		{
+		  if (memp[dst_off + i] != rand_mem[i])
+		    abort ();
+		}
+
+	      /* Check that the area around the destination is not
+		 clobbered.  */
+	      for (i = 1; i < space_around; i++)
+		{
+		  if (memp[dst_off - i] != lo_around[i])
+		    abort ();
+		  if (memp[dst_off + size - 1 + i] != hi_around[i])
+		    abort ();
+		}
+	    }
+	}
+    }
+
+  puts ("Test succeeded.");
+
+  return 0;
+}
diff --git a/string/tester.c b/string/tester.c
new file mode 100644
index 0000000000..74ac34541e
--- /dev/null
+++ b/string/tester.c
@@ -0,0 +1,570 @@
+#include <ansidecl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include <fcntl.h>
+
+#ifndef HAVE_GNU_LD
+#define _sys_nerr	sys_nerr
+#define _sys_errlist	sys_errlist
+#endif
+
+#define	STREQ(a, b)	(strcmp((a), (b)) == 0)
+
+CONST char *it = "<UNSET>";	/* Routine name for message routines. */
+size_t errors = 0;
+
+/* Complain if condition is not true.  */
+void
+DEFUN(check, (thing, number), int thing AND int number)
+{
+  if (!thing)
+    {
+      printf("%s flunked test %d\n", it, number);
+      ++errors;
+    }
+}
+
+/* Complain if first two args don't strcmp as equal.  */
+void
+DEFUN(equal, (a, b, number), CONST char *a AND CONST char *b AND int number)
+{
+  check(a != NULL && b != NULL && STREQ(a, b), number);
+}
+
+char one[50];
+char two[50];
+
+int
+DEFUN(main, (argc, argv), int argc AND char **argv)
+{
+  /* Test strcmp first because we use it to test other things.  */
+  it = "strcmp";
+  check(strcmp("", "") == 0, 1);		/* Trivial case. */
+  check(strcmp("a", "a") == 0, 2);		/* Identity. */
+  check(strcmp("abc", "abc") == 0, 3);		/* Multicharacter. */
+  check(strcmp("abc", "abcd") < 0, 4);		/* Length mismatches. */
+  check(strcmp("abcd", "abc") > 0, 5);
+  check(strcmp("abcd", "abce") < 0, 6);		/* Honest miscompares. */
+  check(strcmp("abce", "abcd") > 0, 7);
+  check(strcmp("a\203", "a") > 0, 8);		/* Tricky if char signed. */
+  check(strcmp("a\203", "a\003") > 0, 9);
+
+  /* Test strcpy next because we need it to set up other tests.  */
+  it = "strcpy";
+  check(strcpy(one, "abcd") == one, 1);	/* Returned value. */
+  equal(one, "abcd", 2);		/* Basic test. */
+
+  (void) strcpy(one, "x");
+  equal(one, "x", 3);			/* Writeover. */
+  equal(one+2, "cd", 4);		/* Wrote too much? */
+
+  (void) strcpy(two, "hi there");
+  (void) strcpy(one, two);
+  equal(one, "hi there", 5);		/* Basic test encore. */
+  equal(two, "hi there", 6);		/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  equal(one, "", 7);			/* Boundary condition. */
+
+  /* strcat.  */
+  it = "strcat";
+  (void) strcpy(one, "ijk");
+  check(strcat(one, "lmn") == one, 1);	/* Returned value. */
+  equal(one, "ijklmn", 2);		/* Basic test. */
+
+  (void) strcpy(one, "x");
+  (void) strcat(one, "yz");
+  equal(one, "xyz", 3);			/* Writeover. */
+  equal(one+4, "mn", 4);			/* Wrote too much? */
+
+  (void) strcpy(one, "gh");
+  (void) strcpy(two, "ef");
+  (void) strcat(one, two);
+  equal(one, "ghef", 5);			/* Basic test encore. */
+  equal(two, "ef", 6);			/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  (void) strcat(one, "");
+  equal(one, "", 7);			/* Boundary conditions. */
+  (void) strcpy(one, "ab");
+  (void) strcat(one, "");
+  equal(one, "ab", 8);
+  (void) strcpy(one, "");
+  (void) strcat(one, "cd");
+  equal(one, "cd", 9);
+
+  /* strncat - first test it as strcat, with big counts,
+     then test the count mechanism.  */
+  it = "strncat";
+  (void) strcpy(one, "ijk");
+  check(strncat(one, "lmn", 99) == one, 1);	/* Returned value. */
+  equal(one, "ijklmn", 2);		/* Basic test. */
+
+  (void) strcpy(one, "x");
+  (void) strncat(one, "yz", 99);
+  equal(one, "xyz", 3);			/* Writeover. */
+  equal(one+4, "mn", 4);			/* Wrote too much? */
+
+  (void) strcpy(one, "gh");
+  (void) strcpy(two, "ef");
+  (void) strncat(one, two, 99);
+  equal(one, "ghef", 5);			/* Basic test encore. */
+  equal(two, "ef", 6);			/* Stomped on source? */
+
+  (void) strcpy(one, "");
+  (void) strncat(one, "", 99);
+  equal(one, "", 7);			/* Boundary conditions. */
+  (void) strcpy(one, "ab");
+  (void) strncat(one, "", 99);
+  equal(one, "ab", 8);
+  (void) strcpy(one, "");
+  (void) strncat(one, "cd", 99);
+  equal(one, "cd", 9);
+
+  (void) strcpy(one, "ab");
+  (void) strncat(one, "cdef", 2);
+  equal(one, "abcd", 10);			/* Count-limited. */
+
+  (void) strncat(one, "gh", 0);
+  equal(one, "abcd", 11);			/* Zero count. */
+
+  (void) strncat(one, "gh", 2);
+  equal(one, "abcdgh", 12);		/* Count and length equal. */
+
+  /* strncmp - first test as strcmp with big counts,
+     then test count code.  */
+  it = "strncmp";
+  check(strncmp("", "", 99) == 0, 1);	/* Trivial case. */
+  check(strncmp("a", "a", 99) == 0, 2);	/* Identity. */
+  check(strncmp("abc", "abc", 99) == 0, 3);	/* Multicharacter. */
+  check(strncmp("abc", "abcd", 99) < 0, 4);	/* Length unequal. */
+  check(strncmp("abcd", "abc", 99) > 0, 5);
+  check(strncmp("abcd", "abce", 99) < 0, 6);	/* Honestly unequal. */
+  check(strncmp("abce", "abcd", 99) > 0, 7);
+  check(strncmp("a\203", "a", 2) > 0, 8);	/* Tricky if '\203' < 0 */
+  check(strncmp("a\203", "a\003", 2) > 0, 9);
+  check(strncmp("abce", "abcd", 3) == 0, 10);	/* Count limited. */
+  check(strncmp("abce", "abc", 3) == 0, 11);	/* Count == length. */
+  check(strncmp("abcd", "abce", 4) < 0, 12);	/* Nudging limit. */
+  check(strncmp("abc", "def", 0) == 0, 13);	/* Zero count. */
+
+  /* strncpy - testing is a bit different because of odd semantics.  */
+  it = "strncpy";
+  check(strncpy(one, "abc", 4) == one, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 2);
+  equal(one, "xycdefgh", 3);		/* Copy cut by count. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 3);		/* Copy cut just before NUL. */
+  equal(one, "xyzdefgh", 4);
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 4);		/* Copy just includes NUL. */
+  equal(one, "xyz", 5);
+  equal(one+4, "efgh", 6);		/* Wrote too much? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strncpy(one, "xyz", 5);		/* Copy includes padding. */
+  equal(one, "xyz", 7);
+  equal(one+4, "", 8);
+  equal(one+5, "fgh", 9);
+
+  (void) strcpy(one, "abc");
+  (void) strncpy(one, "xyz", 0);		/* Zero-length copy. */
+  equal(one, "abc", 10);	
+
+  (void) strncpy(one, "", 2);		/* Zero-length source. */
+  equal(one, "", 11);
+  equal(one+1, "", 12);	
+  equal(one+2, "c", 13);
+
+  (void) strcpy(one, "hi there");
+  (void) strncpy(two, one, 9);
+  equal(two, "hi there", 14);		/* Just paranoia. */
+  equal(one, "hi there", 15);		/* Stomped on source? */
+
+  /* strlen.  */
+  it = "strlen";
+  check(strlen("") == 0, 1);		/* Empty. */
+  check(strlen("a") == 1, 2);		/* Single char. */
+  check(strlen("abcd") == 4, 3);		/* Multiple chars. */
+
+  /* strchr.  */
+  it = "strchr";
+  check(strchr("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strchr(one, 'c') == one+2, 2);	/* Basic test. */
+  check(strchr(one, 'd') == one+3, 3);	/* End of string. */
+  check(strchr(one, 'a') == one, 4);	/* Beginning. */
+  check(strchr(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(strchr(one, 'b') == one+1, 6);	/* Finding first. */
+  (void) strcpy(one, "");
+  check(strchr(one, 'b') == NULL, 7);	/* Empty string. */
+  check(strchr(one, '\0') == one, 8);	/* NUL in empty string. */
+
+#if 0
+  /* index - just like strchr.  */
+  it = "index";
+  check(index("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(index(one, 'c') == one+2, 2);	/* Basic test. */
+  check(index(one, 'd') == one+3, 3);	/* End of string. */
+  check(index(one, 'a') == one, 4);	/* Beginning. */
+  check(index(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(index(one, 'b') == one+1, 6);	/* Finding first. */
+  (void) strcpy(one, "");
+  check(index(one, 'b') == NULL, 7);	/* Empty string. */
+  check(index(one, '\0') == one, 8);	/* NUL in empty string. */
+#endif
+
+  /* strrchr.  */
+  it = "strrchr";
+  check(strrchr("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strrchr(one, 'c') == one+2, 2);	/* Basic test. */
+  check(strrchr(one, 'd') == one+3, 3);	/* End of string. */
+  check(strrchr(one, 'a') == one, 4);	/* Beginning. */
+  check(strrchr(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(strrchr(one, 'b') == one+3, 6);	/* Finding last. */
+  (void) strcpy(one, "");
+  check(strrchr(one, 'b') == NULL, 7);	/* Empty string. */
+  check(strrchr(one, '\0') == one, 8);	/* NUL in empty string. */
+
+#if 0
+  /* rindex - just like strrchr.  */
+  it = "rindex";
+  check(rindex("abcd", 'z') == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(rindex(one, 'c') == one+2, 2);	/* Basic test. */
+  check(rindex(one, 'd') == one+3, 3);	/* End of string. */
+  check(rindex(one, 'a') == one, 4);	/* Beginning. */
+  check(rindex(one, '\0') == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(rindex(one, 'b') == one+3, 6);	/* Finding last. */
+  (void) strcpy(one, "");
+  check(rindex(one, 'b') == NULL, 7);	/* Empty string. */
+  check(rindex(one, '\0') == one, 8);	/* NUL in empty string. */
+#endif
+
+  /* strpbrk - somewhat like strchr.  */
+  it = "strpbrk";
+  check(strpbrk("abcd", "z") == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(strpbrk(one, "c") == one+2, 2);	/* Basic test. */
+  check(strpbrk(one, "d") == one+3, 3);	/* End of string. */
+  check(strpbrk(one, "a") == one, 4);	/* Beginning. */
+  check(strpbrk(one, "") == NULL, 5);	/* Empty search list. */
+  check(strpbrk(one, "cb") == one+1, 6);	/* Multiple search. */
+  (void) strcpy(one, "abcabdea");
+  check(strpbrk(one, "b") == one+1, 7);	/* Finding first. */
+  check(strpbrk(one, "cb") == one+1, 8);	/* With multiple search. */
+  check(strpbrk(one, "db") == one+1, 9);	/* Another variant. */
+  (void) strcpy(one, "");
+  check(strpbrk(one, "bc") == NULL, 10);	/* Empty string. */
+  check(strpbrk(one, "") == NULL, 11);	/* Both strings empty. */
+
+  /* strstr - somewhat like strchr.  */
+  it = "strstr";
+  check(strstr("abcd", "z") == NULL, 1);	/* Not found. */
+  check(strstr("abcd", "abx") == NULL, 2);	/* Dead end. */
+  (void) strcpy(one, "abcd");
+  check(strstr(one, "c") == one+2, 3);	/* Basic test. */
+  check(strstr(one, "bc") == one+1, 4);	/* Multichar. */
+  check(strstr(one, "d") == one+3, 5);	/* End of string. */
+  check(strstr(one, "cd") == one+2, 6);	/* Tail of string. */
+  check(strstr(one, "abc") == one, 7);	/* Beginning. */
+  check(strstr(one, "abcd") == one, 8);	/* Exact match. */
+  check(strstr(one, "abcde") == NULL, 9);	/* Too long. */
+  check(strstr(one, "de") == NULL, 10);	/* Past end. */
+  check(strstr(one, "") == one, 11);	/* Finding empty. */
+  (void) strcpy(one, "ababa");
+  check(strstr(one, "ba") == one+1, 12);	/* Finding first. */
+  (void) strcpy(one, "");
+  check(strstr(one, "b") == NULL, 13);	/* Empty string. */
+  check(strstr(one, "") == one, 14);	/* Empty in empty string. */
+  (void) strcpy(one, "bcbca");
+  check(strstr(one, "bca") == one+2, 15);	/* False start. */
+  (void) strcpy(one, "bbbcabbca");
+  check(strstr(one, "bbca") == one+1, 16);	/* With overlap. */
+
+  /* strspn.  */
+  it = "strspn";
+  check(strspn("abcba", "abc") == 5, 1);	/* Whole string. */
+  check(strspn("abcba", "ab") == 2, 2);	/* Partial. */
+  check(strspn("abc", "qx") == 0, 3);	/* None. */
+  check(strspn("", "ab") == 0, 4);	/* Null string. */
+  check(strspn("abc", "") == 0, 5);	/* Null search list. */
+
+  /* strcspn.  */
+  it = "strcspn";
+  check(strcspn("abcba", "qx") == 5, 1);	/* Whole string. */
+  check(strcspn("abcba", "cx") == 2, 2);	/* Partial. */
+  check(strcspn("abc", "abc") == 0, 3);	/* None. */
+  check(strcspn("", "ab") == 0, 4);	/* Null string. */
+  check(strcspn("abc", "") == 3, 5);	/* Null search list. */
+
+  /* strtok - the hard one.  */
+  it = "strtok";
+  (void) strcpy(one, "first, second, third");
+  equal(strtok(one, ", "), "first", 1);	/* Basic test. */
+  equal(one, "first", 2);
+  equal(strtok((char *)NULL, ", "), "second", 3);
+  equal(strtok((char *)NULL, ", "), "third", 4);
+  check(strtok((char *)NULL, ", ") == NULL, 5);
+  (void) strcpy(one, ", first, ");
+  equal(strtok(one, ", "), "first", 6);	/* Extra delims, 1 tok. */
+  check(strtok((char *)NULL, ", ") == NULL, 7);
+  (void) strcpy(one, "1a, 1b; 2a, 2b");
+  equal(strtok(one, ", "), "1a", 8);	/* Changing delim lists. */
+  equal(strtok((char *)NULL, "; "), "1b", 9);
+  equal(strtok((char *)NULL, ", "), "2a", 10);
+  (void) strcpy(two, "x-y");
+  equal(strtok(two, "-"), "x", 11);	/* New string before done. */
+  equal(strtok((char *)NULL, "-"), "y", 12);
+  check(strtok((char *)NULL, "-") == NULL, 13);
+  (void) strcpy(one, "a,b, c,, ,d");
+  equal(strtok(one, ", "), "a", 14);	/* Different separators. */
+  equal(strtok((char *)NULL, ", "), "b", 15);
+  equal(strtok((char *)NULL, " ,"), "c", 16);	/* Permute list too. */
+  equal(strtok((char *)NULL, " ,"), "d", 17);
+  check(strtok((char *)NULL, ", ") == NULL, 18);
+  check(strtok((char *)NULL, ", ") == NULL, 19);	/* Persistence. */
+  (void) strcpy(one, ", ");
+  check(strtok(one, ", ") == NULL, 20);	/* No tokens. */
+  (void) strcpy(one, "");
+  check(strtok(one, ", ") == NULL, 21);	/* Empty string. */
+  (void) strcpy(one, "abc");
+  equal(strtok(one, ", "), "abc", 22);	/* No delimiters. */
+  check(strtok((char *)NULL, ", ") == NULL, 23);
+  (void) strcpy(one, "abc");
+  equal(strtok(one, ""), "abc", 24);	/* Empty delimiter list. */
+  check(strtok((char *)NULL, "") == NULL, 25);
+  (void) strcpy(one, "abcdefgh");
+  (void) strcpy(one, "a,b,c");
+  equal(strtok(one, ","), "a", 26);	/* Basics again... */
+  equal(strtok((char *)NULL, ","), "b", 27);
+  equal(strtok((char *)NULL, ","), "c", 28);
+  check(strtok((char *)NULL, ",") == NULL, 29);
+  equal(one+6, "gh", 30);			/* Stomped past end? */
+  equal(one, "a", 31);			/* Stomped old tokens? */
+  equal(one+2, "b", 32);
+  equal(one+4, "c", 33);
+
+  /* memcmp.  */
+  it = "memcmp";
+  check(memcmp("a", "a", 1) == 0, 1);	/* Identity. */
+  check(memcmp("abc", "abc", 3) == 0, 2);	/* Multicharacter. */
+  check(memcmp("abcd", "abce", 4) < 0, 3);	/* Honestly unequal. */
+  check(memcmp("abce", "abcd", 4) > 0, 4);
+  check(memcmp("alph", "beta", 4) < 0, 5);
+  check(memcmp("a\203", "a\003", 2) > 0, 6);
+  check(memcmp("abce", "abcd", 3) == 0, 7);	/* Count limited. */
+  check(memcmp("abc", "def", 0) == 0, 8);	/* Zero count. */
+
+  /* memchr.  */
+  it = "memchr";
+  check(memchr("abcd", 'z', 4) == NULL, 1);	/* Not found. */
+  (void) strcpy(one, "abcd");
+  check(memchr(one, 'c', 4) == one+2, 2);	/* Basic test. */
+  check(memchr(one, 'd', 4) == one+3, 3);	/* End of string. */
+  check(memchr(one, 'a', 4) == one, 4);	/* Beginning. */
+  check(memchr(one, '\0', 5) == one+4, 5);	/* Finding NUL. */
+  (void) strcpy(one, "ababa");
+  check(memchr(one, 'b', 5) == one+1, 6);	/* Finding first. */
+  check(memchr(one, 'b', 0) == NULL, 7);	/* Zero count. */
+  check(memchr(one, 'a', 1) == one, 8);	/* Singleton case. */
+  (void) strcpy(one, "a\203b");
+  check(memchr(one, 0203, 3) == one+1, 9);	/* Unsignedness. */
+
+  /* memcpy - need not work for overlap.  */
+  it = "memcpy";
+  check(memcpy(one, "abc", 4) == one, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memcpy(one+1, "xyz", 2);
+  equal(one, "axydefgh", 3);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memcpy(one, "xyz", 0);
+  equal(one, "abc", 4);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memcpy(two, one, 9);
+  equal(two, "hi there", 5);		/* Just paranoia. */
+  equal(one, "hi there", 6);		/* Stomped on source? */
+
+  /* memmove - must work on overlap.  */
+  it = "memmove";
+  check(memmove(one, "abc", 4) == one, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, "xyz", 2);
+  equal(one, "axydefgh", 3);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memmove(one, "xyz", 0);
+  equal(one, "abc", 4);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memmove(two, one, 9);
+  equal(two, "hi there", 5);		/* Just paranoia. */
+  equal(one, "hi there", 6);		/* Stomped on source? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, one, 9);
+  equal(one, "aabcdefgh", 7);		/* Overlap, right-to-left. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one+1, one+2, 7);
+  equal(one, "acdefgh", 8);		/* Overlap, left-to-right. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memmove(one, one, 9);
+  equal(one, "abcdefgh", 9);		/* 100% overlap. */
+
+  /* memccpy - first test like memcpy, then the search part
+     The SVID, the only place where memccpy is mentioned, says
+     overlap might fail, so we don't try it.  Besides, it's hard
+     to see the rationale for a non-left-to-right memccpy.  */
+  it = "memccpy";
+  check(memccpy(one, "abc", 'q', 4) == NULL, 1);	/* Returned value. */
+  equal(one, "abc", 2);			/* Did the copy go right? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) memccpy(one+1, "xyz", 'q', 2);
+  equal(one, "axydefgh", 3);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) memccpy(one, "xyz", 'q', 0);
+  equal(one, "abc", 4);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) memccpy(two, one, 'q', 9);
+  equal(two, "hi there", 5);		/* Just paranoia. */
+  equal(one, "hi there", 6);		/* Stomped on source? */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) strcpy(two, "horsefeathers");
+  check(memccpy(two, one, 'f', 9) == two+6, 7);	/* Returned value. */
+  equal(one, "abcdefgh", 8);		/* Source intact? */
+  equal(two, "abcdefeathers", 9);		/* Copy correct? */
+
+  (void) strcpy(one, "abcd");
+  (void) strcpy(two, "bumblebee");
+  check(memccpy(two, one, 'a', 4) == two+1, 10);	/* First char. */
+  equal(two, "aumblebee", 11);
+  check(memccpy(two, one, 'd', 4) == two+4, 12);	/* Last char. */
+  equal(two, "abcdlebee", 13);
+  (void) strcpy(one, "xyz");
+  check(memccpy(two, one, 'x', 1) == two+1, 14);	/* Singleton. */
+  equal(two, "xbcdlebee", 15);
+
+  /* memset.  */
+  it = "memset";
+  (void) strcpy(one, "abcdefgh");
+  check(memset(one+1, 'x', 3) == one+1, 1);	/* Return value. */
+  equal(one, "axxxefgh", 2);		/* Basic test. */
+
+  (void) memset(one+2, 'y', 0);
+  equal(one, "axxxefgh", 3);		/* Zero-length set. */
+
+  (void) memset(one+5, 0, 1);
+  equal(one, "axxxe", 4);			/* Zero fill. */
+  equal(one+6, "gh", 5);			/* And the leftover. */
+
+  (void) memset(one+2, 010045, 1);
+  equal(one, "ax\045xe", 6);		/* Unsigned char convert. */
+
+  /* bcopy - much like memcpy.
+     Berklix manual is silent about overlap, so don't test it.  */
+  it = "bcopy";
+  (void) bcopy("abc", one, 4);
+  equal(one, "abc", 1);			/* Simple copy. */
+
+  (void) strcpy(one, "abcdefgh");
+  (void) bcopy("xyz", one+1, 2);
+  equal(one, "axydefgh", 2);		/* Basic test. */
+
+  (void) strcpy(one, "abc");
+  (void) bcopy("xyz", one, 0);
+  equal(one, "abc", 3);			/* Zero-length copy. */
+
+  (void) strcpy(one, "hi there");
+  (void) strcpy(two, "foo");
+  (void) bcopy(one, two, 9);
+  equal(two, "hi there", 4);		/* Just paranoia. */
+  equal(one, "hi there", 5);		/* Stomped on source? */
+
+  /* bzero.  */
+  it = "bzero";
+  (void) strcpy(one, "abcdef");
+  bzero(one+2, 2);
+  equal(one, "ab", 1);			/* Basic test. */
+  equal(one+3, "", 2);
+  equal(one+4, "ef", 3);
+
+  (void) strcpy(one, "abcdef");
+  bzero(one+2, 0);
+  equal(one, "abcdef", 4);		/* Zero-length copy. */
+
+#if 0
+  /* bcmp - somewhat like memcmp.  */
+  it = "bcmp";
+  check(bcmp("a", "a", 1) == 0, 1);	/* Identity. */
+  check(bcmp("abc", "abc", 3) == 0, 2);	/* Multicharacter. */
+  check(bcmp("abcd", "abce", 4) != 0, 3);	/* Honestly unequal. */
+  check(bcmp("abce", "abcd", 4) != 0, 4);
+  check(bcmp("alph", "beta", 4) != 0, 5);
+  check(bcmp("abce", "abcd", 3) == 0, 6);	/* Count limited. */
+  check(bcmp("abc", "def", 0) == 0, 8);	/* Zero count. */
+#endif
+
+  {
+    char text[] = "This,is,a,test";
+    char *list = text;
+    it = "strsep";
+    check (!strcmp ("This", strsep (&list, ",")), 1);
+    check (!strcmp ("is", strsep (&list, ",")), 2);
+    check (!strcmp ("a", strsep (&list, ",")), 3);
+    check (!strcmp ("test", strsep (&list, ",")), 4);
+    check (strsep (&list, ",") == NULL, 5);
+  }
+
+  /* strerror - VERY system-dependent.  */
+  {
+    int f;
+    it = "strerror";
+    f = __open("/", O_WRONLY);	/* Should always fail. */
+    check(f < 0 && errno > 0 && errno < _sys_nerr, 1);
+    equal(strerror(errno), _sys_errlist[errno], 2);
+  }
+
+  {
+    int status;
+    if (errors == 0)
+      {
+	status = EXIT_SUCCESS;
+	puts("No errors.");
+      }
+    else
+      {
+	status = EXIT_FAILURE;
+	printf("%Z errors.\n", errors);
+      }
+    exit(status);
+  }
+}