Rename find_next_newline to find_newline_no_quit.

 src/search.c (find_newline_no_quit): Rename from find_next_newline.
 Add commentary.
 src/lisp.h (find_newline_no_quit): Rename prototype.
 src/xdisp.c (back_to_previous_line_start)
 (forward_to_next_line_start, get_visually_first_element)
 (move_it_vertically_backward): Callers of find_newline_no_quit changed.
 src/indent.c (vmotion): Callers of find_newline_no_quit changed.
 src/bidi.c (bidi_find_paragraph_start): Callers of
 find_newline_no_quit changed.

6 files changed, 32 insertions, 18 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 7e5a2b71026..c54d4bee7e9 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,5 +1,17 @@
 2013-03-06  Eli Zaretskii  <eliz@gnu.org>
 
+        * search.c (find_newline_no_quit): Rename from find_next_newline.
+        Add commentary.
+
+        * lisp.h (find_newline_no_quit): Rename prototype.
+
+        * xdisp.c (back_to_previous_line_start)
+        (forward_to_next_line_start, get_visually_first_element)
+        (move_it_vertically_backward): Callers of find_newline_no_quit changed.
+        * indent.c (vmotion): Callers of find_newline_no_quit changed.
+        * bidi.c (bidi_find_paragraph_start): Callers of
+        find_newline_no_quit changed.
+
         * msdos.c: Change encoding to cp850.  (Bug#13879)
         (fr_keyboard, it_keyboard, dk_keyboard): Update keyboard layouts.
 
diff --git a/src/bidi.c b/src/bidi.c
index feb422cc5d2..cf5e580cd8f 100644
--- a/src/bidi.c
+++ b/src/bidi.c
@@ -1108,7 +1108,7 @@ bidi_find_paragraph_start (ptrdiff_t pos, ptrdiff_t pos_byte)
        display string?  And what if a display string covering some
        of the text over which we scan back includes
        paragraph_start_re?  */
-    pos = find_next_newline (pos - 1, -1, &pos_byte);
+    pos = find_newline_no_quit (pos - 1, -1, &pos_byte);
   if (n >= MAX_PARAGRAPH_SEARCH)
     pos_byte = BEGV_BYTE;
   return pos_byte;
diff --git a/src/indent.c b/src/indent.c
index 469d774f681..abb4e08ad08 100644
--- a/src/indent.c
+++ b/src/indent.c
@@ -1843,7 +1843,7 @@ vmotion (register ptrdiff_t from, register EMACS_INT vtarget, struct window *w)
           ptrdiff_t bytepos;
           Lisp_Object propval;
 
-          prevline = find_next_newline (from - 1, -1, &bytepos);
+          prevline = find_newline_no_quit (from - 1, -1, &bytepos);
           while (prevline > BEGV
                  && ((selective > 0
                       && indented_beyond_p (prevline, bytepos, selective))
@@ -1853,7 +1853,7 @@ vmotion (register ptrdiff_t from, register EMACS_INT vtarget, struct window *w)
                                                        Qinvisible,
                                                        text_prop_object),
                          TEXT_PROP_MEANS_INVISIBLE (propval))))
-            prevline = find_next_newline (prevline - 1, -1, &bytepos);
+            prevline = find_newline_no_quit (prevline - 1, -1, &bytepos);
           pos = *compute_motion (prevline, 0,
                                  lmargin,
                                  0,
@@ -1894,7 +1894,7 @@ vmotion (register ptrdiff_t from, register EMACS_INT vtarget, struct window *w)
       ptrdiff_t bytepos;
       Lisp_Object propval;
 
-      prevline = find_next_newline (from, -1, &bytepos);
+      prevline = find_newline_no_quit (from, -1, &bytepos);
       while (prevline > BEGV
              && ((selective > 0
                   && indented_beyond_p (prevline, bytepos, selective))
@@ -1904,7 +1904,7 @@ vmotion (register ptrdiff_t from, register EMACS_INT vtarget, struct window *w)
                                                    Qinvisible,
                                                    text_prop_object),
                      TEXT_PROP_MEANS_INVISIBLE (propval))))
-        prevline = find_next_newline (prevline - 1, -1, &bytepos);
+        prevline = find_newline_no_quit (prevline - 1, -1, &bytepos);
       pos = *compute_motion (prevline, 0,
                              lmargin,
                              0,
diff --git a/src/lisp.h b/src/lisp.h
index 7d443e57d66..fe216b93401 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -3346,7 +3346,7 @@ extern ptrdiff_t find_newline (ptrdiff_t, ptrdiff_t, ptrdiff_t,
                                ptrdiff_t *, ptrdiff_t *, bool);
 extern EMACS_INT scan_newline (ptrdiff_t, ptrdiff_t, ptrdiff_t, ptrdiff_t,
                                EMACS_INT, bool);
-extern ptrdiff_t find_next_newline (ptrdiff_t, ptrdiff_t, ptrdiff_t *);
+extern ptrdiff_t find_newline_no_quit (ptrdiff_t, ptrdiff_t, ptrdiff_t *);
 extern ptrdiff_t find_before_next_newline (ptrdiff_t, ptrdiff_t,
                                            ptrdiff_t, ptrdiff_t *);
 extern void syms_of_search (void);
diff --git a/src/search.c b/src/search.c
index 6a79208557b..090965ead3b 100644
--- a/src/search.c
+++ b/src/search.c
@@ -941,15 +941,17 @@ scan_newline (ptrdiff_t start, ptrdiff_t start_byte,
   return count * direction;
 }
 
+/* Like find_newline, but doesn't allow QUITting and doesn't return
+   SHORTAGE.  */
 ptrdiff_t
-find_next_newline (ptrdiff_t from, ptrdiff_t cnt, ptrdiff_t *bytepos)
+find_newline_no_quit (ptrdiff_t from, ptrdiff_t cnt, ptrdiff_t *bytepos)
 {
   return find_newline (from, 0, cnt, NULL, bytepos, 0);
 }
 
-/* Like find_next_newline, but returns position before the newline,
-   not after, and only search up to TO.  This isn't just
-   find_next_newline (...)-1, because you might hit TO.  */
+/* Like find_newline, but returns position before the newline, not
+   after, and only search up to TO.
+   This isn't just find_newline_no_quit (...)-1, because you might hit TO.  */
 
 ptrdiff_t
 find_before_next_newline (ptrdiff_t from, ptrdiff_t to,
diff --git a/src/xdisp.c b/src/xdisp.c
index 6dbc7637ee4..934c617bf8e 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -5905,8 +5905,8 @@ pop_it (struct it *it)
 static void
 back_to_previous_line_start (struct it *it)
 {
-  IT_CHARPOS (*it)
-    = find_next_newline (IT_CHARPOS (*it) - 1, -1, &IT_BYTEPOS (*it));
+  IT_CHARPOS (*it) = find_newline_no_quit (IT_CHARPOS (*it) - 1, -1,
+                                           &IT_BYTEPOS (*it));
 }
 
 
@@ -5922,7 +5922,7 @@ back_to_previous_line_start (struct it *it)
 
    Newlines may come from buffer text, overlay strings, or strings
    displayed via the `display' property.  That's the reason we can't
-   simply use find_next_newline_no_quit.
+   simply use find_newline_no_quit.
 
    Note that this function may not skip over invisible text that is so
    because of text properties and immediately follows a newline.  If
@@ -5978,7 +5978,7 @@ forward_to_next_line_start (struct it *it, int *skipped_p,
   if (!newline_found_p)
     {
       ptrdiff_t bytepos, start = IT_CHARPOS (*it);
-      ptrdiff_t limit = find_next_newline (start, 1, &bytepos);
+      ptrdiff_t limit = find_newline_no_quit (start, 1, &bytepos);
       Lisp_Object pos;
 
       eassert (!STRINGP (it->string));
@@ -7432,8 +7432,8 @@ get_visually_first_element (struct it *it)
       if (string_p)
         it->bidi_it.charpos = it->bidi_it.bytepos = 0;
       else
-        it->bidi_it.charpos
-          = find_next_newline (IT_CHARPOS (*it), -1, &it->bidi_it.bytepos);
+        it->bidi_it.charpos = find_newline_no_quit (IT_CHARPOS (*it), -1,
+                                                    &it->bidi_it.bytepos);
       bidi_paragraph_init (it->paragraph_embedding, &it->bidi_it, 1);
       do
         {
@@ -9067,8 +9067,8 @@ move_it_vertically_backward (struct it *it, int dy)
           && IT_CHARPOS (*it) > BEGV
           && FETCH_BYTE (IT_BYTEPOS (*it) - 1) != '\n')
         {
-          ptrdiff_t nl_pos =
-            find_next_newline (IT_CHARPOS (*it) - 1, -1, NULL);
+          ptrdiff_t nl_pos = find_newline_no_quit (IT_CHARPOS (*it) - 1, -1,
+                                                   NULL);
 
           move_it_to (it, nl_pos, -1, -1, -1, MOVE_TO_POS);
         }