Change comparison functions =, <, >, <=, >= to take many arguments.

* src/data.c: Change comparison functions' interface and
  implementation
* src/lisp.h: Make arithcompare available for efficient two arg
  comparisons
* src/bytecode.c: Use arithcompare
* src/fileio.c: Use new interface
* test/automated/data-tests.el: New tests for comparison functions
* etc/NEWS

1 files changed, 10 insertions, 0 deletions

diff --git a/src/lisp.h b/src/lisp.h
index 38b538d9bc2..2b1af1faa19 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -3160,6 +3160,16 @@ EXFUN (Fbyteorder, 0) ATTRIBUTE_CONST;
 /* Defined in data.c.  */
 extern Lisp_Object indirect_function (Lisp_Object);
 extern Lisp_Object find_symbol_value (Lisp_Object);
+enum Arith_Comparison {
+  ARITH_EQUAL,
+  ARITH_NOTEQUAL,
+  ARITH_LESS,
+  ARITH_GRTR,
+  ARITH_LESS_OR_EQUAL,
+  ARITH_GRTR_OR_EQUAL
+};
+extern Lisp_Object arithcompare (Lisp_Object num1, Lisp_Object num2,
+                                 enum Arith_Comparison comparison);
 
 /* Convert the integer I to an Emacs representation, either the integer
    itself, or a cons of two or three integers, or if all else fails a float.