merge from gcc

include/ChangeLog

@@ -1,3 +1,7 @@
+2001-09-24  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* libiberty.h (reconcat): New function.
+
 2001-09-18  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* libiberty.h (concat, concat_length, concat_copy, concat_copy2,

include/libiberty.h

@@ -91,6 +91,15 @@ extern const char *lbasename PARAMS ((const char *));
 
 extern char *concat PARAMS ((const char *, ...)) ATTRIBUTE_MALLOC;
 
+/* Concatenate an arbitrary number of strings.  You must pass NULL as
+   the last argument of this function, to terminate the list of
+   strings.  Allocates memory using xmalloc.  The first argument is
+   not one of the strings to be concatenated, but if not NULL is a
+   pointer to be freed after the new string is created, similar to the
+   way xrealloc works.  */
+
+extern char *reconcat PARAMS ((char *, const char *, ...)) ATTRIBUTE_MALLOC;
+
 /* Determine the length of concatenating an arbitrary number of
    strings.  You must pass NULL as the last argument of this function,
    to terminate the list of strings.  */

libiberty/ChangeLog

@@ -1,3 +1,7 @@
+2001-09-24  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* concat.c (reconcat): New function.
+
 2001-09-17  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	* concat.c (vconcat_length, vconcat_copy, concat_length,

libiberty/concat.c

@@ -171,6 +171,31 @@ concat VPARAMS ((const char *first, ...))
   return newstr;
 }
 
+char *
+reconcat VPARAMS ((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 = (char *) xmalloc (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);
+  VA_CLOSE (args);
+
+  if (optr)
+    free (optr);
+
+  return newstr;
+}
+
 #ifdef MAIN
 #define NULLP (char *)0