* progmodes/compile.el (compilation-mode-hook)

[bpt/emacs.git] / src / doc.c

diff --git a/src/doc.c b/src/doc.c
index d2d664d..16c0d40 100644 (file)
--- a/src/doc.c
+++ b/src/doc.c
@@ -1,6 +1,7 @@
 /* Record indices of function doc strings stored in a file.
 
-Copyright (C) 1985-1986, 1993-1995, 1997-2012 Free Software Foundation, Inc.
+Copyright (C) 1985-1986, 1993-1995, 1997-2013 Free Software Foundation,
+Inc.
 
 This file is part of GNU Emacs.
 
@@ -21,7 +22,7 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <config.h>
 
 #include <sys/types.h>
-#include <sys/file.h>  /* Must be after sys/types.h for USG*/
+#include <sys/file.h>  /* Must be after sys/types.h for USG.  */
 #include <fcntl.h>
 #include <unistd.h>
 
@@ -42,7 +43,7 @@ static ptrdiff_t get_doc_string_buffer_size;
 
 static unsigned char *read_bytecode_pointer;
 
-/* readchar in lread.c calls back here to fetch the next byte.
+/* `readchar' in lread.c calls back here to fetch the next byte.
    If UNREADFLAG is 1, we unread a byte.  */
 
 int
@@ -83,24 +84,23 @@ get_doc_string (Lisp_Object filepos, bool unibyte, bool definition)
   ptrdiff_t minsize;
   int offset;
   EMACS_INT position;
-  Lisp_Object file, tem;
+  Lisp_Object file, tem, pos;
   USE_SAFE_ALLOCA;
 
   if (INTEGERP (filepos))
     {
       file = Vdoc_file_name;
-      position = XINT (filepos);
+      pos = filepos;
     }
   else if (CONSP (filepos))
     {
       file = XCAR (filepos);
-      position = XINT (XCDR (filepos));
+      pos = XCDR (filepos);
     }
   else
     return Qnil;
 
-  if (position < 0)
-    position = - position;
+  position = eabs (XINT (pos));
 
   if (!STRINGP (Vdoc_directory))
     return Qnil;
@@ -144,7 +144,8 @@ get_doc_string (Lisp_Object filepos, bool unibyte, bool definition)
        }
 #endif
       if (fd < 0)
-       error ("Cannot open doc string file \"%s\"", name);
+       return concat3 (build_string ("Cannot open doc string file \""),
+                       file, build_string ("\"\n"));
     }
 
   /* Seek only to beginning of disk block.  */
@@ -346,6 +347,8 @@ string is passed through `substitute-command-keys'.  */)
     }
 
   fun = Findirect_function (function, Qnil);
+  if (CONSP (fun) && EQ (XCAR (fun), Qmacro))
+    fun = XCDR (fun);
   if (SUBRP (fun))
     {
       if (XSUBR (fun)->doc == 0)
@@ -399,8 +402,6 @@ string is passed through `substitute-command-keys'.  */)
          else
            return Qnil;
        }
-      else if (EQ (funcar, Qmacro))
-       return Fdocumentation (Fcdr (fun), raw);
       else
        goto oops;
     }
@@ -410,16 +411,19 @@ string is passed through `substitute-command-keys'.  */)
       xsignal1 (Qinvalid_function, fun);
     }
 
-  /* Check for an advised function.  Its doc string
-     has an `ad-advice-info' text property.  */
+  /* Check for a dynamic docstring.  These come with
+     a dynamic-docstring-function text property.  */
   if (STRINGP (doc))
     {
-      Lisp_Object innerfunc;
-      innerfunc = Fget_text_property (make_number (0),
-                                     intern ("ad-advice-info"),
+      Lisp_Object func
+       = Fget_text_property (make_number (0),
+                             intern ("dynamic-docstring-function"),
                                      doc);
-      if (! NILP (innerfunc))
-       doc = call1 (intern ("ad-make-advised-docstring"), innerfunc);
+      if (!NILP (func))
+       /* Pass both `doc' and `function' since `function' can be needed, and
+          finding `doc' can be annoying: calling `documentation' is not an
+          option because it would infloop.  */
+       doc = call2 (func, doc, function);
     }
 
   /* If DOC is 0, it's typically because of a dumped file missing
@@ -527,6 +531,8 @@ store_function_docstring (Lisp_Object obj, ptrdiff_t offset)
        {
          tem = Fcdr (Fcdr (fun));
          if (CONSP (tem) && INTEGERP (XCAR (tem)))
+           /* FIXME: This modifies typically pure hash-cons'd data, so its
+              correctness is quite delicate.  */
            XSETCAR (tem, make_number (offset));
        }
       else if (EQ (tem, Qmacro))