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262 lines (238 loc) · 11.3 KB
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/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* [email protected]. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System;
using System.Collections.Generic;
using System.IO;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.RegularExpressions;
using IronPython.Runtime;
using IronPython.Runtime.Exceptions;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
using Microsoft.Scripting;
using Microsoft.Scripting.Runtime;
using Microsoft.Scripting.Utils;
[assembly: PythonModule("_warnings", typeof(IronPython.Modules.PythonWarnings))]
namespace IronPython.Modules {
public static class PythonWarnings {
public const string __doc__ = "Provides low-level functionality for reporting warnings";
private static readonly object _keyFields = new object();
private static readonly string _keyDefaultAction = "default_action";
private static readonly string _keyFilters = "filters";
private static readonly string _keyOnceRegistry = "once_registry";
[SpecialName]
public static void PerformModuleReload(PythonContext/*!*/ context, PythonDictionary/*!*/ dict) {
List defaultFilters = new List();
if (context.PythonOptions.WarnPython30) {
defaultFilters.AddNoLock(PythonTuple.MakeTuple("ignore", null, PythonExceptions.DeprecationWarning, null, 0));
}
defaultFilters.AddNoLock(PythonTuple.MakeTuple("ignore", null, PythonExceptions.PendingDeprecationWarning, null, 0));
defaultFilters.AddNoLock(PythonTuple.MakeTuple("ignore", null, PythonExceptions.ImportWarning, null, 0));
defaultFilters.AddNoLock(PythonTuple.MakeTuple("ignore", null, PythonExceptions.BytesWarning, null, 0));
context.GetOrCreateModuleState(_keyFields, () => {
dict.Add(_keyDefaultAction, "default");
dict.Add(_keyOnceRegistry, new PythonDictionary());
dict.Add(_keyFilters, defaultFilters);
return dict;
});
}
#region Public API
public static void warn(CodeContext context, object message, [DefaultParameterValue(null)]PythonType category, [DefaultParameterValue(1)]int stacklevel) {
PythonContext pContext = PythonContext.GetContext(context);
List argv = pContext.GetSystemStateValue("argv") as List;
if (PythonOps.IsInstance(message, PythonExceptions.Warning)) {
category = DynamicHelpers.GetPythonType(message);
}
if (category == null) {
category = PythonExceptions.UserWarning;
}
if (!category.IsSubclassOf(PythonExceptions.Warning)) {
throw PythonOps.ValueError("category is not a subclass of Warning");
}
TraceBackFrame caller = null;
PythonDictionary globals;
int lineno;
if (PythonContext.GetContext(context).PythonOptions.Frames) {
try {
caller = SysModule._getframeImpl(context, stacklevel - 1);
} catch (ValueErrorException) { }
}
if (caller == null) {
globals = Builtin.globals(context) as PythonDictionary;
lineno = 1;
} else {
globals = caller.f_globals;
lineno = (int)caller.f_lineno;
}
string module;
string filename;
if (globals != null && globals.ContainsKey("__name__")) {
module = (string)globals.get("__name__");
} else {
module = "<string>";
}
filename = globals.get("__file__") as string;
if (filename == null || filename == "") {
if (module == "__main__") {
if (argv != null && argv.Count > 0) {
filename = argv[0] as string;
} else {
// interpreter lacks sys.argv
filename = "__main__";
}
}
if (filename == null || filename == "") {
filename = module;
}
}
PythonDictionary registry = (PythonDictionary)globals.setdefault("__warningregistry__", new PythonDictionary());
warn_explicit(context, message, category, filename, lineno, module, registry, globals);
}
public static void warn_explicit(CodeContext context, object message, PythonType category, string filename, int lineno, [DefaultParameterValue(null)]string module, [DefaultParameterValue(null)]PythonDictionary registry, [DefaultParameterValue(null)]object module_globals) {
PythonContext pContext = PythonContext.GetContext(context);
PythonDictionary fields = (PythonDictionary)pContext.GetModuleState(_keyFields);
PythonExceptions.BaseException msg;
string text; // message text
if (string.IsNullOrEmpty(module)) {
module = (filename == null || filename == "") ? "<unknown>" : filename;
if (module.EndsWith(".py")) {
module = module.Substring(0, module.Length - 3);
}
}
if (registry == null) {
registry = new PythonDictionary();
}
if (PythonOps.IsInstance(message, PythonExceptions.Warning)) {
msg = (PythonExceptions.BaseException)message;
text = msg.ToString();
category = DynamicHelpers.GetPythonType(msg);
} else {
text = message.ToString();
msg = PythonExceptions.CreatePythonThrowable(category, message.ToString());
}
PythonTuple key = PythonTuple.MakeTuple(text, category, lineno);
if (registry.ContainsKey(key)) {
return;
}
string action = Converter.ConvertToString(fields[_keyDefaultAction]);
PythonTuple last_filter = null;
bool loop_break = false;
foreach (PythonTuple filter in (List)fields[_keyFilters]) {
last_filter = filter;
action = (string)filter._data[0];
PythonRegex.RE_Pattern fMsg = (PythonRegex.RE_Pattern)filter._data[1];
PythonType fCat = (PythonType)filter._data[2];
PythonRegex.RE_Pattern fMod = (PythonRegex.RE_Pattern)filter._data[3];
int fLno;
if (filter._data[4] is int) {
fLno = (int)filter._data[4];
} else {
fLno = (Extensible<int>)filter._data[4];
}
if ((fMsg == null || fMsg.match(text) != null) &&
category.IsSubclassOf(fCat) &&
(fMod == null || fMod.match(module) != null) &&
(fLno == 0 || fLno == lineno)) {
loop_break = true;
break;
}
}
if (!loop_break) {
action = Converter.ConvertToString(fields[_keyDefaultAction]);
}
switch (action) {
case "ignore":
registry.Add(key, 1);
return;
case "error":
throw msg.GetClrException();
case "once":
registry.Add(key, 1);
PythonTuple onceKey = PythonTuple.MakeTuple(text, category);
PythonDictionary once_reg = (PythonDictionary)fields[_keyOnceRegistry];
if (once_reg.ContainsKey(onceKey)) {
return;
}
once_reg.Add(key, 1);
break;
case "always":
break;
case "module":
registry.Add(key, 1);
PythonTuple altKey = PythonTuple.MakeTuple(text, category, 0);
if (registry.ContainsKey(altKey)) {
return;
}
registry.Add(altKey, 1);
break;
case "default":
registry.Add(key, 1);
break;
default:
throw PythonOps.RuntimeError("Unrecognized action ({0}) in warnings.filters:\n {1}", action, last_filter);
}
object warnings = pContext.GetWarningsModule();
if (warnings != null) {
PythonCalls.Call(
context,
PythonOps.GetBoundAttr(context, warnings, "showwarning"),
msg, category, filename, lineno, null, null);
} else {
showwarning(context, msg, category, filename, lineno, null, null);
}
}
internal static string formatwarning(object message, PythonType category, string filename, int lineno, [DefaultParameterValue(null)]string line) {
StringBuilder sb = new StringBuilder();
sb.AppendFormat("{0}:{1}: {2}: {3}\n", filename, lineno, category.Name, message);
if (line == null && lineno > 0 && File.Exists(filename)) {
StreamReader reader = new StreamReader(filename);
for (int i = 0; i < lineno - 1; i++) {
reader.ReadLine();
}
line = reader.ReadLine();
}
if (line != null) {
sb.AppendFormat(" {0}\n", line.strip());
}
return sb.ToString();
}
internal static void showwarning(CodeContext context, object message, PythonType category, string filename, int lineno, [DefaultParameterValue(null)]object file, [DefaultParameterValue(null)]string line) {
string text = formatwarning(message, category, filename, lineno, line);
try {
if (file == null) {
PythonContext pContext = PythonContext.GetContext(context);
PythonFile stderr = pContext.GetSystemStateValue("stderr") as PythonFile;
if (stderr != null) {
stderr.write(text);
} else {
// use CLR stderr if python's is unavailable
Console.Error.Write(text);
}
} else {
if (file is PythonFile) {
((PythonFile)file).write(text);
} else if (file is TextWriter) {
((TextWriter)file).Write(text);
} // unrecognized file type - warning is lost
}
} catch (IOException) {
// invalid file - warning is lost
}
}
#endregion
}
}