This patch fixes a bug on machines where char is unsigned by default, by

[ginac.git] / ginac / clifford.cpp

diff --git a/ginac/clifford.cpp b/ginac/clifford.cpp
index 3b4684c2165f07dda393d241401caeff9ba9db23..301d40c19640a605842079de30e8281293000918 100644 (file)
--- a/ginac/clifford.cpp
+++ b/ginac/clifford.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's clifford algebra (Dirac gamma) objects. */
 
 /*
- *  GiNaC Copyright (C) 1999-2009 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2011 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -1132,7 +1132,7 @@ ex remove_dirac_ONE(const ex & e, unsigned char rl, unsigned options)
        return e1;
 }
 
-char clifford_max_label(const ex & e, bool ignore_ONE)
+int clifford_max_label(const ex & e, bool ignore_ONE)
 {
        if (is_a<clifford>(e))
                if (ignore_ONE && is_a<diracone>(e.op(0)))
@@ -1140,7 +1140,7 @@ char clifford_max_label(const ex & e, bool ignore_ONE)
                else
                        return ex_to<clifford>(e).get_representation_label();
        else {
-               char rl = -1;
+               int rl = -1;
                for (size_t i=0; i < e.nops(); i++) 
                        rl = (rl > clifford_max_label(e.op(i), ignore_ONE)) ? rl : clifford_max_label(e.op(i), ignore_ONE);
                return rl;
@@ -1291,11 +1291,11 @@ lst clifford_to_lst(const ex & e, const ex & c, bool algebraic)
        if (algebraic) // check if algebraic method is applicable
                for (unsigned int i = 0; i < D; i++) 
                        if (pow(c.subs(mu == i, subs_options::no_pattern), 2).is_zero() 
-                               or (not is_a<numeric>(pow(c.subs(mu == i, subs_options::no_pattern), 2))))
+                               || (! is_a<numeric>(pow(c.subs(mu == i, subs_options::no_pattern), 2))))
                                algebraic = false;
        lst V; 
        ex v0 = remove_dirac_ONE(canonicalize_clifford(e+clifford_prime(e)).normal())/2;
-       if (not v0.is_zero())
+       if (! v0.is_zero())
                V.append(v0);
        ex e1 = canonicalize_clifford(e - v0 * dirac_ONE(ex_to<clifford>(c).get_representation_label())); 
        if (algebraic) {
@@ -1312,7 +1312,7 @@ lst clifford_to_lst(const ex & e, const ex & c, bool algebraic)
                        e1 = canonicalize_clifford(expand_dummy_sum(e, true));
                        V.remove_all();
                        v0 = remove_dirac_ONE(canonicalize_clifford(e1+clifford_prime(e1)).normal())/2;
-                       if (not v0.is_zero()) {
+                       if (! v0.is_zero()) {
                                V.append(v0);
                                e1 = canonicalize_clifford(e1 - v0 * dirac_ONE(ex_to<clifford>(c).get_representation_label())); 
                        }