(math-read-number): Handle C numbers beginning with 0 correctly.

1 files changed, 6 insertions, 5 deletions

diff --git a/lisp/calc/calc.el b/lisp/calc/calc.el
index 0721e8a983f..a4a6387296b 100644
--- a/lisp/calc/calc.el
+++ b/lisp/calc/calc.el
@@ -3455,7 +3455,7 @@ largest Emacs integer.")
 
 
 ;;; Parse a simple number in string form.   [N X] [Public]
-(defun math-read-number (s)
+(defun math-read-number (s &optional decimal)
   "Convert the string S into a Calc number."
   (math-normalize
    (cond
@@ -3465,7 +3465,8 @@ largest Emacs integer.")
      (let ((digs (math-match-substring s 1)))
        (if (and (eq calc-language 'c)
                 (> (length digs) 1)
-                (eq (aref digs 0) ?0))
+                (eq (aref digs 0) ?0)
+                (null decimal))
            (math-read-number (concat "8#" digs))
          (if (<= (length digs) (* 2 math-bignum-digit-length))
              (string-to-number digs)
@@ -3492,8 +3493,8 @@ largest Emacs integer.")
            (frac (math-match-substring s 2)))
        (let ((ilen (length int))
              (flen (length frac)))
-         (let ((int (if (> ilen 0) (math-read-number int) 0))
-               (frac (if (> flen 0) (math-read-number frac) 0)))
+         (let ((int (if (> ilen 0) (math-read-number int t) 0))
+               (frac (if (> flen 0) (math-read-number frac t) 0)))
            (and int frac (or (> ilen 0) (> flen 0))
                 (list 'float
                       (math-add (math-scale-int int flen) frac)
@@ -3503,7 +3504,7 @@ largest Emacs integer.")
     ((string-match "^\\(.*\\)[eE]\\([-+]?[0-9]+\\)$" s)
      (let ((mant (math-match-substring s 1))
            (exp (math-match-substring s 2)))
-       (let ((mant (if (> (length mant) 0) (math-read-number mant) 1))
+       (let ((mant (if (> (length mant) 0) (math-read-number mant t) 1))
              (exp (if (<= (length exp) (if (memq (aref exp 0) '(?+ ?-)) 8 7))
                       (string-to-number exp))))
          (and mant exp (Math-realp mant) (> exp -4000000) (< exp 4000000)