stpncpy.m4

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Hash : 3740c324
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Date : 2007-09-12T15:59:57

Track CVS Autoconf on AC_USE_SYSTEM_EXTENSIONS.
* m4/extensions.m4 (AC_USE_SYSTEM_EXTENSIONS): Update to CVS
Autoconf definition.
* modules/euidaccess (Depends-on): Add extensions, for
AC_USE_SYSTEM_EXTENSIONS with autoconf <= 2.59.
* modules/fnmatch (Depends-on): Likewise.
* modules/getaddrinfo (Depends-on): Likewise.
* modules/getdelim (Depends-on): Likewise.
* modules/getline (Depends-on): Likewise.
* modules/getsubopt (Depends-on): Likewise.
* modules/gettext (Depends-on): Likewise.
* modules/group-member (Depends-on): Likewise.
* modules/mbchar (Depends-on): Likewise.
* modules/memmem (Depends-on): Likewise.
* modules/mempcpy (Depends-on): Likewise.
* modules/memrchr (Depends-on): Likewise.
* modules/pagealign_alloc (Depends-on): Likewise.
* modules/readutmp (Depends-on): Likewise.
* modules/stpcpy (Depends-on): Likewise.
* modules/stpncpy (Depends-on): Likewise.
* modules/strchrnul (Depends-on): Likewise.
* modules/strndup (Depends-on): Likewise.
* modules/strsep (Depends-on): Likewise.
* modules/strverscmp (Depends-on): Likewise.
* modules/vasprintf (Depends-on): Likewise.
* modules/wcwidth (Depends-on): Likewise.
* m4/euidaccess.m4 (gl_FUNC_EUIDACCESS): AC_GNU_SOURCE will be
obsolete in Autoconf 2.62; use AC_USE_SYSTEM_EXTENSIONS instead.
* m4/fnmatch.m4 (gl_FUNC_FNMATCH_GNU): Likewise.
* m4/getaddrinfo.m4 (gl_PREREQ_GETADDR_INFO): Likewise.
* m4/getdelim.m4 (gl_FUNC_GETDELIM): Likewise.
* m4/getline.m4 (gl_FUNC_GETLINE): Likewise.
* m4/getsubopt.m4 (gl_FUNC_GETSUBOPT): Likewise.
* m4/glob.m4 (gl_PREREQ_GLOB): Likewise.
* m4/group-member.m4 (gl_FUNC_GROUP_MEMBER): Likewise.
* m4/mbchar.m4 (gl_MBCHAR): Likewise.
* m4/memmem.m4 (gl_FUNC_MEMMEM): Likewise.
* m4/mempcpy.m4 (gl_FUNC_MEMPCPY): Likewise.
* m4/memrchr.m4 (gl_FUNC_MEMRCHR): Likewise.
* m4/mmap-anon.m4 (gl_FUNC_MMAP_ANON): Likewise.
* m4/pagealign_alloc.m4 (gl_PAGEALIGN_ALLOC): Likewise.
* m4/readutmp.m4 (gl_READUTMP): Likewise.
* m4/regex.m4 (gl_PREREQ_REGEX): Likewise.
* m4/stpcpy.m4 (gl_FUNC_STPCPY): Likewise.
* m4/stpncpy.m4 (gl_FUNC_STPNCPY): Likewise.
* m4/strchrnul.m4 (gl_FUNC_STRCHRNUL): Likewise.
* m4/strndup.m4 (gl_FUNC_STRNDUP): Likewise.
* m4/strnlen.m4 (gl_FUNC_STRNLEN): Likewise.
* m4/strsep.m4 (gl_FUNC_STRSEP): Likewise.
* m4/strverscmp.m4 (gl_FUNC_STRVERSCMP): Likewise.
* m4/vasprintf.m4 (gl_PREREQ_VASPRINTF_H): Likewise.
* m4/wcwidth.m4 (gl_FUNC_WCWIDTH): Likewise.
* m4/lock.m4 (gl_LOCK_EARLY_BODY): Likewise, but provide fallback,
so that lock.m4 can be used in gettext without extensions module.

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m4/stpncpy.m4

# stpncpy.m4 serial 8
dnl Copyright (C) 2002-2003, 2005-2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_FUNC_STPNCPY],
[
  dnl Persuade glibc <string.h> to declare stpncpy().
  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])

  dnl The stpncpy() declaration in lib/string_.h uses 'restrict'.
  AC_REQUIRE([AC_C_RESTRICT])

  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])

  dnl Both glibc and AIX (4.3.3, 5.1) have an stpncpy() function
  dnl declared in <string.h>. Its side effects are the same as those
  dnl of strncpy():
  dnl      stpncpy (dest, src, n)
  dnl overwrites dest[0..n-1], min(strlen(src),n) bytes coming from src,
  dnl and the remaining bytes being NULs.  However, the return value is
  dnl   in glibc:   dest + min(strlen(src),n)
  dnl   in AIX:     dest + max(0,n-1)
  dnl Only the glibc return value is useful in practice.

  AC_CACHE_CHECK([for working stpncpy], gl_cv_func_stpncpy, [
    AC_TRY_RUN([
#include <stdlib.h>
#include <string.h> /* for strcpy */
/* The stpncpy prototype is missing in <string.h> on AIX 4.  */
extern char *stpncpy (char *dest, const char *src, size_t n);
int main () {
  const char *src = "Hello";
  char dest[10];
  /* AIX 4.3.3 and AIX 5.1 stpncpy() returns dest+1 here.  */
  strcpy (dest, "\377\377\377\377\377\377");
  if (stpncpy (dest, src, 2) != dest + 2) exit(1);
  /* AIX 4.3.3 and AIX 5.1 stpncpy() returns dest+4 here.  */
  strcpy (dest, "\377\377\377\377\377\377");
  if (stpncpy (dest, src, 5) != dest + 5) exit(1);
  /* AIX 4.3.3 and AIX 5.1 stpncpy() returns dest+6 here.  */
  strcpy (dest, "\377\377\377\377\377\377");
  if (stpncpy (dest, src, 7) != dest + 5) exit(1);
  exit(0);
}
], gl_cv_func_stpncpy=yes, gl_cv_func_stpncpy=no,
  [AC_EGREP_CPP([Thanks for using GNU], [
#include <features.h>
#ifdef __GNU_LIBRARY__
  Thanks for using GNU
#endif
], gl_cv_func_stpncpy=yes, gl_cv_func_stpncpy=no)])])

  if test $gl_cv_func_stpncpy = yes; then
    AC_DEFINE(HAVE_STPNCPY, 1,
      [Define if you have the stpncpy() function and it works.])
  else
    HAVE_STPNCPY=0
    AC_LIBOBJ([stpncpy])
    gl_PREREQ_STPNCPY
  fi
])

# Prerequisites of lib/stpncpy.c.
AC_DEFUN([gl_PREREQ_STPNCPY], [
  :
])

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kc3-lang/gnulib/m4/stpncpy.m4

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m4/stpncpy.m4