- make errors and warnings more understandable

[r25984]

diff --git a/scripts/gen_ir_io.py b/scripts/gen_ir_io.py
index 73d529d..fc89c5c 100755 (executable)
--- a/scripts/gen_ir_io.py
+++ b/scripts/gen_ir_io.py
@@ -5,13 +5,21 @@ from jinja2.filters import do_dictsort
 from spec_util import is_dynamic_pinned, verify_node
 import ir_spec
 
+def error(msg):
+       """writes an error message to stderr"""
+       sys.stderr.write("Error: " + msg + "\n");
+
+def warning(msg):
+       """writes a warning message to stderr"""
+       sys.stderr.write("Warning: " + msg + "\n");
+
 def format_args(arglist):
        #argstrings = map(lambda arg : arg["name"], arglist)
        #return ", ".join(argstrings)
        s = ", ".join(arglist)
        if len(s) == 0:
-         return "";
-       return ", " + s;
+         return ""
+       return ", " + s
 
 def format_ifnset(string, node, key):
        if key in node:
@@ -77,7 +85,7 @@ def get_io_type(type, attrname, nodename):
                importcmd = "long %s = read_long(env);" % attrname
                exportcmd = """fprintf(env->file, "%%ld ", %(val)s);"""
        else:
-               print "UNKNOWN TYPE: %s" % type
+               error("cannot generate import/export for node %s: unsupported attribute type: %s" % (nodename, type))
                importcmd = """// BAD: %s %s
                        %s %s = (%s) 0;""" % (type, attrname, type, attrname, type)
                exportcmd = "// BAD: %s" % type
@@ -139,11 +147,11 @@ def preprocess_node(nodename, node):
                prepare_attr(nodename, attr)
                if "special" in attr:
                        if not "init" in attr:
-                               print "Node type %s has an attribute with a \"special\" entry but without \"init\"" % nodename
+                               warning("Node type %s has an attribute with a \"special\" entry but without \"init\"" % nodename)
                                sys.exit(1)
 
                        if attrs_with_special != 0:
-                               print "Node type %s has more than one attribute with a \"special\" entry" % nodename
+                               warning("Node type %s has more than one attribute with a \"special\" entry" % nodename)
                                sys.exit(1)
 
                        attrs_with_special += 1
@@ -153,7 +161,7 @@ def preprocess_node(nodename, node):
                        elif "suffix" in attr["special"]:
                                specialname = nodename + attr["special"]["suffix"]
                        else:
-                               print "Unknown special constructor type for node type %s" %nodename
+                               error("Unknown special constructor type for node type %s" % nodename)
                                sys.exit(1)
 
                        specialconstrs.append(