gdb/

	Code cleanup.
	* charset.c (find_charset_names): Remove variables ix and elt.
	Use free_char_ptr_vec.
	* elfread.c (build_id_to_debug_filename): New variables debugdir_vec,
	back_to and ix.  Use dirnames_to_char_ptr_vec.  Remove variable
	debugdir_end.  New variable debugdir_len.
	* gdb_vecs.h (free_char_ptr_vec, make_cleanup_free_char_ptr_vec)
	(dirnames_to_char_ptr_vec_append, dirnames_to_char_ptr_vec): New
	declarations.
	* progspace.c (clear_program_space_solib_cache): Remove variables ix
	and elt.  Use free_char_ptr_vec.
	* source.c (add_path): Remove variables argv, arg and argv_index.
	New variables dir_vec, back_to, ix and name.
	Use dirnames_to_char_ptr_vec_append.  Use freeargv instead of
	make_cleanup_freeargv.  Remove variable separator.  Simplify the code
	no longer expecting DIRNAME_SEPARATOR.
	(openp): Remove variable p, p1 and len.  New variables dir_vec,
	back_to, ix and dir.  Use dirnames_to_char_ptr_vec.  Simplify the code
	no longer expecting DIRNAME_SEPARATOR.
	* symfile.c (find_separate_debug_file): New variables debugdir_vec,
	back_to and ix.  Use dirnames_to_char_ptr_vec.  Remove variable
	debugdir_end.
	* utils.c (free_char_ptr_vec, do_free_char_ptr_vec)
	(make_cleanup_free_char_ptr_vec, dirnames_to_char_ptr_vec_append)
	(dirnames_to_char_ptr_vec): New functions.

1 files changed, 89 insertions, 0 deletions

diff --git a/gdb/utils.c b/gdb/utils.c
index 1096b3ad..104c5aa 100644
--- a/gdb/utils.c
+++ b/gdb/utils.c
@@ -3802,6 +3802,95 @@ producer_is_gcc_ge_4 (const char *producer)
   return minor;
 }
 
+/* Call xfree for each element of CHAR_PTR_VEC and final VEC_free for
+   CHAR_PTR_VEC itself.
+
+   You must not modify CHAR_PTR_VEC after it got registered with this function
+   by make_cleanup as the CHAR_PTR_VEC base address may change on its updates.
+   Contrary to VEC_free this function does not (cannot) clear the pointer.  */
+
+void
+free_char_ptr_vec (VEC (char_ptr) *char_ptr_vec)
+{
+  int ix;
+  char *name;
+
+  for (ix = 0; VEC_iterate (char_ptr, char_ptr_vec, ix, name); ++ix)
+    xfree (name);
+  VEC_free (char_ptr, char_ptr_vec);
+}
+
+/* Helper for make_cleanup_free_char_ptr_vec.  */
+
+static void
+do_free_char_ptr_vec (void *arg)
+{
+  VEC (char_ptr) *char_ptr_vec = arg;
+
+  free_char_ptr_vec (char_ptr_vec);
+}
+
+/* Make cleanup handler calling xfree for each element of CHAR_PTR_VEC and
+   final VEC_free for CHAR_PTR_VEC itself.
+
+   You must not modify CHAR_PTR_VEC after this cleanup registration as the
+   CHAR_PTR_VEC base address may change on its updates.  Contrary to VEC_free
+   this function does not (cannot) clear the pointer.  */
+
+struct cleanup *
+make_cleanup_free_char_ptr_vec (VEC (char_ptr) *char_ptr_vec)
+{
+  return make_cleanup (do_free_char_ptr_vec, char_ptr_vec);
+}
+
+/* Extended version of dirnames_to_char_ptr_vec - additionally if *VECP is
+   non-NULL the new list elements from DIRNAMES are appended to the existing
+   *VECP list of entries.  *VECP address will be updated by this call.  */
+
+void
+dirnames_to_char_ptr_vec_append (VEC (char_ptr) **vecp, const char *dirnames)
+{
+  do
+    {
+      size_t this_len;
+      char *next_dir, *this_dir;
+
+      next_dir = strchr (dirnames, DIRNAME_SEPARATOR);
+      if (next_dir == NULL)
+	this_len = strlen (dirnames);
+      else
+	{
+	  this_len = next_dir - dirnames;
+	  next_dir++;
+	}
+
+      this_dir = xmalloc (this_len + 1);
+      memcpy (this_dir, dirnames, this_len);
+      this_dir[this_len] = '\0';
+      VEC_safe_push (char_ptr, *vecp, this_dir);
+
+      dirnames = next_dir;
+    }
+  while (dirnames != NULL);
+}
+
+/* Split DIRNAMES by DIRNAME_SEPARATOR delimiter and return a list of all the
+   elements in their original order.  For empty string ("") DIRNAMES return
+   list of one empty string ("") element.
+   
+   You may modify the returned strings.
+   Read free_char_ptr_vec for its cleanup.  */
+
+VEC (char_ptr) *
+dirnames_to_char_ptr_vec (const char *dirnames)
+{
+  VEC (char_ptr) *retval = NULL;
+  
+  dirnames_to_char_ptr_vec_append (&retval, dirnames);
+
+  return retval;
+}
+
 #ifdef HAVE_WAITPID
 
 #ifdef SIGALRM