cttc.py first version, not tested yet

+#  clex.py: modified by Franck Pommereau (2018)
+
 #  ---------------------------------------------------------------
 #  clex.py
 #

+#  cparse.py: modified by Franck Pommereau (2018)
+
 #  ---------------------------------------------------------------
 #  cparse.py
 #
@@ -755,7 +757,16 @@ def p_empty(t):
     pass
 
 def p_error(t):
-    print("[%s:%s] syntax error" % (t.lineno, t.lexpos))
+    print("[%s] syntax error:" % t.lineno)
+    start = t.lexer.lexdata.rfind("\n", 0, t.lexpos)
+    if start == -1 :
+        start = 0
+    else :
+        start += 1
+    stop = t.lexer.lexdata.find("\n", t.lexpos)
+    head = " " * len("[%s" % t.lineno)
+    print(" >" + head + t.lexer.lexdata[start:stop])
+    print(" >" + head + (" " * (t.lexpos - start)) + "^")
     raise ParseError()
 
 yacc.yacc(debug=1)

+#  cvisitors.py: modified by Franck Pommereau (2018)
+
 #  ---------------------------------------------------------------
 #  cvisitors.py
 #

+#  cx86.py: modified by Franck Pommereau (2018)
+
 #  ---------------------------------------------------------------
 #  cx86.py
 #
@@ -177,7 +179,7 @@ class x86Registers:
         """Emits code that pops the callee-save registers used by
         the stack machine off the process' stack."""
 
-        for reg in self.callee_save_regs_used:
+        for reg in reversed(self.callee_save_regs_used):
             self.o("  popl %s" % reg,
                    "Restore callee-save register")
 

 import argparse, sys, os.path
 
 import ply.yacc as yacc
-from . import cparse, cvisitors, cx86
-cttc = cx86
+from . import cparse, cvisitors, cx86, cttc
 
 ARCH = {"x86" : cx86,
         "ttc" : cttc}
@@ -95,7 +94,7 @@ def main (args=None) :
             ast_file = open(ast_path, "w")
         else :
             ast_file = None
-        code = "\n".join(open(src).readlines())
+        code = "\n".join(l.rstrip() for l in open(src).readlines())
         ret = Compiler(ARCH[args.arch], src).compile(code, ast_file)
         if ast_file is not None :
             ast_file.close()

+int main (int argc, char **argv) {
+   int a;
+   int b;
+   int c;
+   int d;
+   a = 1;
+   b = 1+a;
+   c = 1+a+b;
+   d = 1+a+b+c;
+   a = a * (1*a + 2*b + 3*c + 4*d) - b * (2*a + 3*b + 4*c + 4*d);
+}