master a9cee9c6675 1/5: Retype traverse_interval arg type from Lisp_Object to void *

[Mattias Engdegård]

branch: master
commit a9cee9c6675a7002441bdd186402f45eb5379172
Author: Mattias Engdegård <mattiase@acm.org>
Commit: Mattias Engdegård <mattiase@acm.org>

    Retype traverse_interval arg type from Lisp_Object to void *
    
    This is a refactoring.  It eliminates a few unnecessary conses and
    allows for further improvements.
    
    * src/intervals.c (traverse_intervals):
    Change argument type.  All callers adapted.
    * src/fns.c (collect_interval, Fsxhash_equal_including_properties)
    (Fobject_intervals):
    * src/print.c (print_check_string_charset_prop)
    (print_prune_string_charset, print_object, print_interval):
    Pass a pointer to a Lisp_Object instead of a Lisp_Object.
---
 src/fns.c       | 24 +++++++++++++-----------
 src/intervals.c |  2 +-
 src/intervals.h |  4 ++--
 src/print.c     | 15 ++++++++-------
 4 files changed, 24 insertions(+), 21 deletions(-)

diff --git a/src/fns.c b/src/fns.c
index 2905c3f1b86..f7c36aacea6 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -5241,12 +5241,14 @@ sxhash_obj (Lisp_Object obj, int depth)
 }
 
 static void
-collect_interval (INTERVAL interval, Lisp_Object collector)
+collect_interval (INTERVAL interval, void *arg)
 {
-  nconc2 (collector,
-         list1(list3 (make_fixnum (interval->position),
-                      make_fixnum (interval->position + LENGTH (interval)),
-                      interval->plist)));
+  Lisp_Object *collector = arg;
+  *collector =
+    nconc2 (*collector,
+           list1(list3 (make_fixnum (interval->position),
+                        make_fixnum (interval->position + LENGTH (interval)),
+                        interval->plist)));
 }
 
 
@@ -5309,13 +5311,13 @@ Hash codes are not guaranteed to be preserved across 
Emacs sessions.  */)
   if (STRINGP (obj))
     {
       /* FIXME: This is very wasteful.  We needn't cons at all.  */
-      Lisp_Object collector = Fcons (Qnil, Qnil);
+      Lisp_Object collector = Qnil;
       traverse_intervals (string_intervals (obj), 0, collect_interval,
-                         collector);
+                         &collector);
       return
        make_ufixnum (
          SXHASH_REDUCE (sxhash_combine (sxhash (obj),
-                                        sxhash (CDR (collector)))));
+                                        sxhash (collector))));
     }
 
   return hash_hash_to_fixnum (hashfn_equal (obj, NULL));
@@ -6304,7 +6306,7 @@ Altering this copy does not change the layout of the text 
properties
 in OBJECT.  */)
   (register Lisp_Object object)
 {
-  Lisp_Object collector = Fcons (Qnil, Qnil);
+  Lisp_Object collector = Qnil;
   INTERVAL intervals;
 
   if (STRINGP (object))
@@ -6317,8 +6319,8 @@ in OBJECT.  */)
   if (! intervals)
     return Qnil;
 
-  traverse_intervals (intervals, 0, collect_interval, collector);
-  return CDR (collector);
+  traverse_intervals (intervals, 0, collect_interval, &collector);
+  return collector;
 }
 
 DEFUN ("line-number-at-pos", Fline_number_at_pos,
diff --git a/src/intervals.c b/src/intervals.c
index 1b1fb3b8181..2ab19c2cc56 100644
--- a/src/intervals.c
+++ b/src/intervals.c
@@ -256,7 +256,7 @@ traverse_intervals_noorder (INTERVAL tree, void (*function) 
(INTERVAL, void *),
 
 void
 traverse_intervals (INTERVAL tree, ptrdiff_t position,
-                   void (*function) (INTERVAL, Lisp_Object), Lisp_Object arg)
+                   void (*function) (INTERVAL, void *), void *arg)
 {
   while (tree)
     {
diff --git a/src/intervals.h b/src/intervals.h
index aa7502b4f68..610c803cc77 100644
--- a/src/intervals.h
+++ b/src/intervals.h
@@ -245,8 +245,8 @@ extern INTERVAL create_root_interval (Lisp_Object);
 extern void copy_properties (INTERVAL, INTERVAL);
 extern bool intervals_equal (INTERVAL, INTERVAL);
 extern void traverse_intervals (INTERVAL, ptrdiff_t,
-                                void (*) (INTERVAL, Lisp_Object),
-                                Lisp_Object);
+                                void (*) (INTERVAL, void *),
+                                void *);
 extern void traverse_intervals_noorder (INTERVAL,
                                        void (*) (INTERVAL, void *), void *);
 extern INTERVAL split_interval_right (INTERVAL, ptrdiff_t)
diff --git a/src/print.c b/src/print.c
index 58a23b79d5d..0899dcdeb03 100644
--- a/src/print.c
+++ b/src/print.c
@@ -87,7 +87,7 @@ static struct print_buffer print_buffer;
    print_number_index holds the largest N already used.
    N has to be strictly larger than 0 since we need to distinguish -N.  */
 static ptrdiff_t print_number_index;
-static void print_interval (INTERVAL interval, Lisp_Object printcharfun);
+static void print_interval (INTERVAL interval, void *pprintcharfun);
 
 /* GDB resets this to zero on W32 to disable OutputDebugString calls.  */
 bool print_output_debug_flag EXTERNALLY_VISIBLE = 1;
@@ -1493,8 +1493,6 @@ print_preprocess_string (INTERVAL interval, void *arg)
   print_preprocess (interval->plist);
 }
 
-static void print_check_string_charset_prop (INTERVAL interval, Lisp_Object 
string);
-
 #define PRINT_STRING_NON_CHARSET_FOUND 1
 #define PRINT_STRING_UNSAFE_CHARSET_FOUND 2
 
@@ -1502,7 +1500,7 @@ static void print_check_string_charset_prop (INTERVAL 
interval, Lisp_Object stri
 static int print_check_string_result;
 
 static void
-print_check_string_charset_prop (INTERVAL interval, Lisp_Object string)
+print_check_string_charset_prop (INTERVAL interval, void *pstring)
 {
   Lisp_Object val;
 
@@ -1526,6 +1524,7 @@ print_check_string_charset_prop (INTERVAL interval, 
Lisp_Object string)
   if (! (print_check_string_result & PRINT_STRING_UNSAFE_CHARSET_FOUND))
     {
       ptrdiff_t charpos = interval->position;
+      Lisp_Object string = *(Lisp_Object *)pstring;
       ptrdiff_t bytepos = string_char_to_byte (string, charpos);
       Lisp_Object charset = XCAR (XCDR (val));
 
@@ -1550,7 +1549,7 @@ print_prune_string_charset (Lisp_Object string)
 {
   print_check_string_result = 0;
   traverse_intervals (string_intervals (string), 0,
-                     print_check_string_charset_prop, string);
+                     print_check_string_charset_prop, &string);
   if (NILP (Vprint_charset_text_property)
       || ! (print_check_string_result & PRINT_STRING_UNSAFE_CHARSET_FOUND))
     {
@@ -2401,8 +2400,9 @@ print_object (Lisp_Object obj, Lisp_Object printcharfun, 
bool escapeflag)
 
          if (string_intervals (obj))
            {
+             Lisp_Object pcf = printcharfun;
              traverse_intervals (string_intervals (obj),
-                                 0, print_interval, printcharfun);
+                                 0, print_interval, &pcf);
              printchar (')', printcharfun);
            }
        }
@@ -2792,10 +2792,11 @@ print_object (Lisp_Object obj, Lisp_Object 
printcharfun, bool escapeflag)
    This is part of printing a string that has text properties.  */
 
 static void
-print_interval (INTERVAL interval, Lisp_Object printcharfun)
+print_interval (INTERVAL interval, void *pprintcharfun)
 {
   if (NILP (interval->plist))
     return;
+  Lisp_Object printcharfun = *(Lisp_Object *)pprintcharfun;
   printchar (' ', printcharfun);
   print_object (make_fixnum (interval->position), printcharfun, 1);
   printchar (' ', printcharfun);