}
-/* If CODING_SYSTEM doesn't specify end-of-line format but PARENT
- does, return one of the subsidiary that has the same eol-spec as
- PARENT. Otherwise, return CODING_SYSTEM. If PARENT is nil,
- inherit end-of-line format from the system's setting
+/* If CODING_SYSTEM doesn't specify end-of-line format, return one of
+ the subsidiary that has the same eol-spec as PARENT (if it is not
+ nil and specifies end-of-line format) or the system's setting
(system_eol_type). */
Lisp_Object
parent_spec = CODING_SYSTEM_SPEC (parent);
parent_eol_type = AREF (parent_spec, 2);
+ if (VECTORP (parent_eol_type))
+ parent_eol_type = system_eol_type;
}
else
parent_eol_type = system_eol_type;
return coding_system;
}
+
+/* Check if text-conversion and eol-conversion of CODING_SYSTEM are
+ decided for writing to a process. If not, complement them, and
+ return a new coding system. */
+
+Lisp_Object
+complement_process_encoding_system (Lisp_Object coding_system)
+{
+ Lisp_Object coding_base = Qnil, eol_base = Qnil;
+ Lisp_Object spec, attrs;
+ int i;
+
+ for (i = 0; i < 3; i++)
+ {
+ if (i == 1)
+ coding_system = CDR_SAFE (Vdefault_process_coding_system);
+ else if (i == 2)
+ coding_system = preferred_coding_system ();
+ spec = CODING_SYSTEM_SPEC (coding_system);
+ if (NILP (spec))
+ continue;
+ attrs = AREF (spec, 0);
+ if (NILP (coding_base) && ! EQ (CODING_ATTR_TYPE (attrs), Qundecided))
+ coding_base = CODING_ATTR_BASE_NAME (attrs);
+ if (NILP (eol_base) && ! VECTORP (AREF (spec, 2)))
+ eol_base = coding_system;
+ if (! NILP (coding_base) && ! NILP (eol_base))
+ break;
+ }
+
+ if (i > 0)
+ /* The original CODING_SYSTEM didn't specify text-conversion or
+ eol-conversion. Be sure that we return a fully complemented
+ coding system. */
+ coding_system = coding_inherit_eol_type (coding_base, eol_base);
+ return coding_system;
+}
+
+
/* Emacs has a mechanism to automatically detect a coding system if it
is one of Emacs' internal format, ISO2022, SJIS, and BIG5. But,
it's impossible to distinguish some coding systems accurately