* at-file.texi: New file.

[deliverable/binutils-gdb.git] / libiberty / concat.c

diff --git a/libiberty/concat.c b/libiberty/concat.c
index 5b132c85764f896b6d51b681641a9e69db964eea..1f329ea0e15d69689a962dc9b16fe5152259a944 100644 (file)
--- a/libiberty/concat.c
+++ b/libiberty/concat.c
@@ -1,5 +1,5 @@
 /* Concatenate variable number of strings.
 /* Concatenate variable number of strings.

-   Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+   Copyright (C) 1991, 1994, 2001 Free Software Foundation, Inc.

    Written by Fred Fish @ Cygnus Support
 
 This file is part of the libiberty library.
    Written by Fred Fish @ Cygnus Support
 
 This file is part of the libiberty library.


@@ -15,30 +15,20 @@ Library General Public License for more details.
 
 You should have received a copy of the GNU Library General Public
 License along with libiberty; see the file COPYING.LIB.  If
 
 You should have received a copy of the GNU Library General Public
 License along with libiberty; see the file COPYING.LIB.  If

-not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA.  */
+not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
+Boston, MA 02110-1301, USA.  */

 
 
 /*
 
 
 
 /*
 

-NAME
+@deftypefn Extension char* concat (const char *@var{s1}, const char *@var{s2}, @dots{}, @code{NULL})

 
 

-       concat -- concatenate a variable number of strings
+Concatenate zero or more of strings and return the result in freshly
+@code{xmalloc}ed memory.  Returns @code{NULL} if insufficient memory is
+available.  The argument list is terminated by the first @code{NULL}
+pointer encountered.  Pointers to empty strings are ignored.

 
 

-SYNOPSIS
-
-       #include <varargs.h>
-
-       char *concat (s1, s2, s3, ..., NULL)
-
-DESCRIPTION
-
-       Concatenate a variable number of strings and return the result
-       in freshly malloc'd memory.
-
-       Returns NULL if insufficient memory is available.  The argument
-       list is terminated by the first NULL pointer encountered.  Pointers
-       to empty strings are ignored.
+@end deftypefn

 
 NOTES
 
 
 NOTES
 


@@ -50,109 +40,184 @@ NOTES
        deal with low memory situations itself, it should supply an xmalloc
        that just directly invokes malloc and blindly returns whatever
        malloc returns.
        deal with low memory situations itself, it should supply an xmalloc
        that just directly invokes malloc and blindly returns whatever
        malloc returns.

+

 */
 
 
 */
 
 

+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif

 #include "ansidecl.h"
 #include "libiberty.h"
 #include "ansidecl.h"
 #include "libiberty.h"

+#include <sys/types.h>         /* size_t */

 
 

-#ifdef ANSI_PROTOTYPES

 #include <stdarg.h>
 #include <stdarg.h>

-#else
-#include <varargs.h>
-#endif

 
 

-#ifdef __STDC__
-#include <stddef.h>
-extern size_t strlen (const char *s);
-#else
-extern int strlen ();
+# if HAVE_STRING_H
+#  include <string.h>
+# else
+#  if HAVE_STRINGS_H
+#   include <strings.h>
+#  endif
+# endif
+
+#if HAVE_STDLIB_H
+#include <stdlib.h>

 #endif
 
 #endif
 

-#define NULLP (char *)0
+static inline unsigned long vconcat_length (const char *, va_list);
+static inline unsigned long
+vconcat_length (const char *first, va_list args)
+{
+  unsigned long length = 0;
+  const char *arg;
+
+  for (arg = first; arg ; arg = va_arg (args, const char *))
+    length += strlen (arg);
+
+  return length;
+}
+
+static inline char *
+vconcat_copy (char *dst, const char *first, va_list args)
+{
+  char *end = dst;
+  const char *arg;
+
+  for (arg = first; arg ; arg = va_arg (args, const char *))
+    {
+      unsigned long length = strlen (arg);
+      memcpy (end, arg, length);
+      end += length;
+    }
+  *end = '\000';
+
+  return dst;
+}
+
+/* @undocumented concat_length */
+
+unsigned long
+concat_length (const char *first, ...)
+{
+  unsigned long length;
+
+  VA_OPEN (args, first);
+  VA_FIXEDARG (args, const char *, first);
+  length = vconcat_length (first, args);
+  VA_CLOSE (args);
+
+  return length;
+}
+
+/* @undocumented concat_copy */

 
 

-/* VARARGS */
-#ifdef ANSI_PROTOTYPES

 char *
 char *

-concat (const char *first, ...)
-#else
+concat_copy (char *dst, const char *first, ...)
+{
+  char *save_dst;
+
+  VA_OPEN (args, first);
+  VA_FIXEDARG (args, char *, dst);
+  VA_FIXEDARG (args, const char *, first);
+  vconcat_copy (dst, first, args);
+  save_dst = dst; /* With K&R C, dst goes out of scope here.  */
+  VA_CLOSE (args);
+
+  return save_dst;
+}
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+char *libiberty_concat_ptr;
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+/* @undocumented concat_copy2 */
+

 char *
 char *

-concat (va_alist)
-     va_dcl
-#endif
+concat_copy2 (const char *first, ...)

 {
 {

-  register int length;
-  register char *newstr;
-  register char *end;
-  register const char *arg;
-  va_list args;
-#ifndef ANSI_PROTOTYPES
-  const char *first;
-#endif
+  VA_OPEN (args, first);
+  VA_FIXEDARG (args, const char *, first);
+  vconcat_copy (libiberty_concat_ptr, first, args);
+  VA_CLOSE (args);

 
 

-  /* First compute the size of the result and get sufficient memory. */
+  return libiberty_concat_ptr;
+}

 
 

-#ifdef ANSI_PROTOTYPES
-  va_start (args, first);
-#else
-  va_start (args);
-  first = va_arg (args, const char *);
-#endif
+char *
+concat (const char *first, ...)
+{
+  char *newstr;

 
 

-  if (first == NULLP)
-    length = 0;
-  else
-    {
-      length = strlen (first);
-      while ((arg = va_arg (args, const char *)) != NULLP)
-       {
-         length += strlen (arg);
-       }
-    }
-  newstr = (char *) xmalloc (length + 1);
-  va_end (args);
+  /* First compute the size of the result and get sufficient memory.  */
+  VA_OPEN (args, first);
+  VA_FIXEDARG (args, const char *, first);
+  newstr = XNEWVEC (char, vconcat_length (first, args) + 1);
+  VA_CLOSE (args);

 
   /* Now copy the individual pieces to the result string. */
 
   /* Now copy the individual pieces to the result string. */

+  VA_OPEN (args, first);
+  VA_FIXEDARG (args, const char *, first);
+  vconcat_copy (newstr, first, args);
+  VA_CLOSE (args);

 
 

-  if (newstr != NULLP)
-    {
-#ifdef ANSI_PROTOTYPES
-      va_start (args, first);
-#else
-      va_start (args);
-      first = va_arg (args, const char *);
-#endif
-      end = newstr;
-      if (first != NULLP)
-       {
-         arg = first;
-         while (*arg)
-           {
-             *end++ = *arg++;
-           }
-         while ((arg = va_arg (args, const char *)) != NULLP)
-           {
-             while (*arg)
-               {
-                 *end++ = *arg++;
-               }
-           }
-       }
-      *end = '\000';
-      va_end (args);
-    }
+  return newstr;
+}
+
+/*
+
+@deftypefn Extension char* reconcat (char *@var{optr}, const char *@var{s1}, @dots{}, @code{NULL})
+
+Same as @code{concat}, except that if @var{optr} is not @code{NULL} it
+is freed after the string is created.  This is intended to be useful
+when you're extending an existing string or building up a string in a
+loop:
+
+@example
+  str = reconcat (str, "pre-", str, NULL);
+@end example
+
+@end deftypefn

 
 

-  return (newstr);
+*/
+
+char *
+reconcat (char *optr, const char *first, ...)
+{
+  char *newstr;
+
+  /* First compute the size of the result and get sufficient memory.  */
+  VA_OPEN (args, first);
+  VA_FIXEDARG (args, char *, optr);
+  VA_FIXEDARG (args, const char *, first);
+  newstr = XNEWVEC (char, vconcat_length (first, args) + 1);
+  VA_CLOSE (args);
+
+  /* Now copy the individual pieces to the result string. */
+  VA_OPEN (args, first);
+  VA_FIXEDARG (args, char *, optr);
+  VA_FIXEDARG (args, const char *, first);
+  vconcat_copy (newstr, first, args);
+  if (optr) /* Done before VA_CLOSE so optr stays in scope for K&R C.  */
+    free (optr);
+  VA_CLOSE (args);
+
+  return newstr;

 }
 
 #ifdef MAIN
 }
 
 #ifdef MAIN

+#define NULLP (char *)0

 
 /* Simple little test driver. */
 
 #include <stdio.h>
 
 int
 
 /* Simple little test driver. */
 
 #include <stdio.h>
 
 int

-main ()
+main (void)

 {
   printf ("\"\" = \"%s\"\n", concat (NULLP));
   printf ("\"a\" = \"%s\"\n", concat ("a", NULLP));
 {
   printf ("\"\" = \"%s\"\n", concat (NULLP));
   printf ("\"a\" = \"%s\"\n", concat ("a", NULLP));