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1246 lines (1087 loc) · 55.5 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
* ironpy@microsoft.com. 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.Threading;
using Microsoft.Scripting;
using Microsoft.Scripting.Runtime;
using Microsoft.Scripting.Utils;
using IronPython.Runtime;
using IronPython.Runtime.Exceptions;
using IronPython.Runtime.Operations;
using IronPython.Runtime.Types;
using IronPython.Runtime.Binding;
#if FEATURE_NUMERICS
using System.Numerics;
#else
using Microsoft.Scripting.Math;
#endif
[assembly: PythonModule("_struct", typeof(IronPython.Modules.PythonStruct))]
namespace IronPython.Modules {
public static class PythonStruct {
[SpecialName]
public static void PerformModuleReload(PythonContext/*!*/ context, PythonDictionary/*!*/ dict) {
context.EnsureModuleException("structerror", dict, "error", "struct");
}
#region Public API
public const string __doc__ = null;
public const string __version__ = "0.2";
public const int _PY_STRUCT_FLOAT_COERCE = 0;
public const int _PY_STRUCT_OVERFLOW_MASKING = 0;
public const int _PY_STRUCT_RANGE_CHECKING = 0;
[PythonType, Documentation("Represents a compiled struct pattern")]
public class Struct : IWeakReferenceable {
private string _formatString; // the last format string passed to __init__
private Format[] _formats; // the various formatting options for the compiled struct
private bool _isStandardized; // true if the format is in standardized mode
private bool _isLittleEndian; // true if the format is in little endian mode
private int _encodingCount = -1; // the number of objects consumed/produced by the format
private int _encodingSize = -1; // the number of bytes read/produced by the format
private WeakRefTracker _tracker; // storage for weak proxy's
private void Initialize(Struct s) {
_formatString = s._formatString;
_formats = s._formats;
_isStandardized = s._isStandardized;
_isLittleEndian = s._isLittleEndian;
_encodingCount = s._encodingCount;
_encodingSize = s._encodingSize;
_tracker = s._tracker;
}
internal Struct(CodeContext/*!*/ context, [NotNull]string/*!*/ fmt) {
__init__(context, fmt);
}
#region Python construction
[Documentation("creates a new uninitialized struct object - all arguments are ignored")]
public Struct(params object[] args) {
}
[Documentation("creates a new uninitialized struct object - all arguments are ignored")]
public Struct([ParamDictionary]IDictionary<object, object> kwArgs, params object[] args) {
}
[Documentation("initializes or re-initializes the compiled struct object with a new format")]
public void __init__(CodeContext/*!*/ context, [NotNull]string/*!*/ fmt) {
ContractUtils.RequiresNotNull(fmt, "fmt");
_formatString = fmt;
Struct s;
bool gotIt;
lock (_cache) {
gotIt = _cache.TryGetValue(_formatString, out s);
}
if (gotIt) {
Initialize(s);
} else {
Compile(context, fmt);
}
}
#endregion
#region Public API
[Documentation("gets the current format string for the compiled Struct")]
public string format {
get {
return _formatString;
}
}
[Documentation("returns a string consisting of the values serialized according to the format of the struct object")]
public string/*!*/ pack(CodeContext/*!*/ context, params object[] values) {
if (values.Length != _encodingCount) {
throw Error(context, String.Format("pack requires exactly {0} arguments", _encodingCount));
}
int curObj = 0;
StringBuilder res = new StringBuilder(_encodingSize);
for (int i = 0; i < _formats.Length; i++) {
Format curFormat = _formats[i];
if (!_isStandardized) {
// In native mode, align to {size}-byte boundaries
int nativeSize = curFormat.NativeSize;
int alignLength = Align(res.Length, nativeSize);
int padLength = alignLength - res.Length;
for (int j = 0; j < padLength; j++) {
res.Append('\0');
}
}
switch (curFormat.Type) {
case FormatType.PadByte:
res.Append('\0', curFormat.Count);
break;
case FormatType.Bool:
res.Append(GetBoolValue(context, curObj++, values) ? (char)1 : '\0');
break;
case FormatType.Char:
for (int j = 0; j < curFormat.Count; j++) {
res.Append(GetCharValue(context, curObj++, values));
}
break;
case FormatType.SignedChar:
for (int j = 0; j < curFormat.Count; j++) {
res.Append((char)(byte)GetSByteValue(context, curObj++, values));
}
break;
case FormatType.UnsignedChar:
for (int j = 0; j < curFormat.Count; j++) {
res.Append((char)GetByteValue(context, curObj++, values));
}
break;
case FormatType.Short:
for (int j = 0; j < curFormat.Count; j++) {
WriteShort(res, _isLittleEndian, GetShortValue(context, curObj++, values));
}
break;
case FormatType.UnsignedShort:
for (int j = 0; j < curFormat.Count; j++) {
WriteUShort(res, _isLittleEndian, GetUShortValue(context, curObj++, values));
}
break;
case FormatType.Int:
for (int j = 0; j < curFormat.Count; j++) {
WriteInt(res, _isLittleEndian, GetIntValue(context, curObj++, values));
}
break;
case FormatType.UnsignedInt:
for (int j = 0; j < curFormat.Count; j++) {
WriteUInt(res, _isLittleEndian, GetULongValue(context, _isStandardized, curObj++, values, "unsigned int"));
}
break;
case FormatType.UnsignedLong:
for (int j = 0; j < curFormat.Count; j++) {
WriteUInt(res, _isLittleEndian, GetULongValue(context, _isStandardized, curObj++, values, "unsigned long"));
}
break;
case FormatType.Pointer:
for (int j = 0; j < curFormat.Count; j++) {
WritePointer(res, _isLittleEndian, GetPointer(context, curObj++, values));
}
break;
case FormatType.LongLong:
for (int j = 0; j < curFormat.Count; j++) {
WriteLong(res, _isLittleEndian, GetLongValue(context, curObj++, values));
}
break;
case FormatType.UnsignedLongLong:
for (int j = 0; j < curFormat.Count; j++) {
WriteULong(res, _isLittleEndian, GetULongLongValue(context, curObj++, values));
}
break;
case FormatType.Double:
for (int j = 0; j < curFormat.Count; j++) {
WriteDouble(res, _isLittleEndian, GetDoubleValue(context, curObj++, values));
}
break;
case FormatType.Float:
for (int j = 0; j < curFormat.Count; j++) {
WriteFloat(res, _isLittleEndian, (float)GetDoubleValue(context, curObj++, values));
}
break;
case FormatType.CString:
WriteString(res, curFormat.Count, GetStringValue(context, curObj++, values));
break;
case FormatType.PascalString:
WritePascalString(res, curFormat.Count - 1, GetStringValue(context, curObj++, values));
break;
default:
throw Error(context, "bad format string");
}
}
return res.ToString();
}
[Documentation("Stores the deserialized data into the provided array")]
public void pack_into(CodeContext/*!*/ context, [NotNull]ArrayModule.array/*!*/ buffer, int offset, params object[] args) {
byte[] existing = buffer.ToByteArray();
if (offset + size > existing.Length) {
throw Error(context, String.Format("pack_into requires a buffer of at least {0} bytes", size));
}
string data = pack(context, args);
for (int i = 0; i < data.Length; i++) {
existing[i + offset] = (byte)data[i];
}
buffer.Clear();
buffer.FromStream(new MemoryStream(existing));
}
[Documentation("deserializes the string using the structs specified format")]
public PythonTuple/*!*/ unpack(CodeContext/*!*/ context, [NotNull]string @string) {
if (@string.Length != size) {
throw Error(context, String.Format("unpack requires a string argument of length {0}", size));
}
string data = @string;
int curIndex = 0;
List<object> res = new List<object>(_encodingCount);
for (int i = 0; i < _formats.Length; i++) {
Format curFormat = _formats[i];
if (!_isStandardized) {
// In native mode, align to {size}-byte boundaries
int nativeSize = curFormat.NativeSize;
if (nativeSize > 0) {
curIndex = Align(curIndex, nativeSize);
}
}
switch (curFormat.Type) {
case FormatType.PadByte:
curIndex += curFormat.Count;
break;
case FormatType.Bool:
for (int j = 0; j < curFormat.Count; j++) {
res.Add(CreateBoolValue(context, ref curIndex, data));
}
break;
case FormatType.Char:
for (int j = 0; j < curFormat.Count; j++) {
res.Add(CreateCharValue(context, ref curIndex, data).ToString());
}
break;
case FormatType.SignedChar:
for (int j = 0; j < curFormat.Count; j++) {
res.Add((int)(sbyte)CreateCharValue(context, ref curIndex, data));
}
break;
case FormatType.UnsignedChar:
for (int j = 0; j < curFormat.Count; j++) {
res.Add((int)CreateCharValue(context, ref curIndex, data));
}
break;
case FormatType.Short:
for (int j = 0; j < curFormat.Count; j++) {
res.Add((int)CreateShortValue(context, ref curIndex, _isLittleEndian, data));
}
break;
case FormatType.UnsignedShort:
for (int j = 0; j < curFormat.Count; j++) {
res.Add((int)CreateUShortValue(context, ref curIndex, _isLittleEndian, data));
}
break;
case FormatType.Int:
for (int j = 0; j < curFormat.Count; j++) {
res.Add(CreateIntValue(context, ref curIndex, _isLittleEndian, data));
}
break;
case FormatType.UnsignedInt:
case FormatType.UnsignedLong:
for (int j = 0; j < curFormat.Count; j++) {
res.Add(BigIntegerOps.__int__((BigInteger)CreateUIntValue(context, ref curIndex, _isLittleEndian, data)));
}
break;
case FormatType.Pointer:
for (int j = 0; j < curFormat.Count; j++) {
if (IntPtr.Size == 4) {
res.Add(CreateIntValue(context, ref curIndex, _isLittleEndian, data));
} else {
res.Add(BigIntegerOps.__int__((BigInteger)CreateLongValue(context, ref curIndex, _isLittleEndian, data)));
}
}
break;
case FormatType.LongLong:
for (int j = 0; j < curFormat.Count; j++) {
res.Add(BigIntegerOps.__int__((BigInteger)CreateLongValue(context, ref curIndex, _isLittleEndian, data)));
}
break;
case FormatType.UnsignedLongLong:
for (int j = 0; j < curFormat.Count; j++) {
res.Add(BigIntegerOps.__int__((BigInteger)CreateULongValue(context, ref curIndex, _isLittleEndian, data)));
}
break;
case FormatType.Float:
for (int j = 0; j < curFormat.Count; j++) {
res.Add((double)CreateFloatValue(context, ref curIndex, _isLittleEndian, data));
}
break;
case FormatType.Double:
for (int j = 0; j < curFormat.Count; j++) {
res.Add(CreateDoubleValue(context, ref curIndex, _isLittleEndian, data));
}
break;
case FormatType.CString:
res.Add(CreateString(context, ref curIndex, curFormat.Count, data));
break;
case FormatType.PascalString:
res.Add(CreatePascalString(context, ref curIndex, curFormat.Count - 1, data));
break;
}
}
return new PythonTuple(res);
}
public PythonTuple/*!*/ unpack(CodeContext/*!*/ context, [NotNull]ArrayModule.array/*!*/ buffer) {
return unpack_from(context, buffer, 0);
}
public PythonTuple/*!*/ unpack(CodeContext/*!*/ context, [NotNull]PythonBuffer/*!*/ buffer) {
return unpack_from(context, buffer, 0);
}
[Documentation("reads the current format from the specified array")]
public PythonTuple/*!*/ unpack_from(CodeContext/*!*/ context, [NotNull]ArrayModule.array/*!*/ buffer, [DefaultParameterValue(0)] int offset) {
return unpack_from(context, buffer.ToByteArray().MakeString(), offset);
}
[Documentation("reads the current format from the specified string")]
public PythonTuple/*!*/ unpack_from(CodeContext/*!*/ context, [NotNull]string/*!*/ buffer, [DefaultParameterValue(0)] int offset) {
int bytesAvail = buffer.Length - offset;
if (bytesAvail < size) {
throw Error(context, String.Format("unpack_from requires a buffer of at least {0} bytes", size));
}
return unpack(context, buffer.Substring(offset, size));
}
[Documentation("reads the current format from the specified buffer object")]
public PythonTuple/*!*/ unpack_from(CodeContext/*!*/ context, [NotNull]PythonBuffer/*!*/ buffer, [DefaultParameterValue(0)] int offset) {
return unpack_from(context, buffer.ToString(), offset);
}
[Documentation("gets the number of bytes that the serialized string will occupy or are required to deserialize the data")]
public int size {
get {
return _encodingSize;
}
}
#endregion
#region IWeakReferenceable Members
WeakRefTracker IWeakReferenceable.GetWeakRef() {
return _tracker;
}
bool IWeakReferenceable.SetWeakRef(WeakRefTracker value) {
return Interlocked.CompareExchange(ref _tracker, value, null) == null;
}
void IWeakReferenceable.SetFinalizer(WeakRefTracker value) {
_tracker = value;
}
#endregion
#region Implementation Details
private void Compile(CodeContext/*!*/ context, string/*!*/ fmt) {
List<Format> res = new List<Format>();
int count = 1;
bool fLittleEndian = BitConverter.IsLittleEndian;
bool fStandardized = false;
for (int i = 0; i < fmt.Length; i++) {
switch (fmt[i]) {
case 'x': // pad byte
res.Add(new Format(FormatType.PadByte, count));
count = 1;
break;
case '?': // bool
res.Add(new Format(FormatType.Bool, count));
count = 1;
break;
case 'c': // char
res.Add(new Format(FormatType.Char, count));
count = 1;
break;
case 'b': // signed char
res.Add(new Format(FormatType.SignedChar, count));
count = 1;
break;
case 'B': // unsigned char
res.Add(new Format(FormatType.UnsignedChar, count));
count = 1;
break;
case 'h': // short
res.Add(new Format(FormatType.Short, count));
count = 1;
break;
case 'H': // unsigned short
res.Add(new Format(FormatType.UnsignedShort, count));
count = 1;
break;
case 'i': // int
case 'l': // long
res.Add(new Format(FormatType.Int, count));
count = 1;
break;
case 'I': // unsigned int
res.Add(new Format(FormatType.UnsignedInt, count));
count = 1;
break;
case 'L': // unsigned long
res.Add(new Format(FormatType.UnsignedLong, count));
count = 1;
break;
case 'q': // long long
res.Add(new Format(FormatType.LongLong, count));
count = 1;
break;
case 'Q': // unsigned long long
res.Add(new Format(FormatType.UnsignedLongLong, count));
count = 1;
break;
case 'f': // float
res.Add(new Format(FormatType.Float, count));
count = 1;
break;
case 'd': // double
res.Add(new Format(FormatType.Double, count));
count = 1;
break;
case 's': // char[]
res.Add(new Format(FormatType.CString, count));
count = 1;
break;
case 'p': // pascal char[]
res.Add(new Format(FormatType.PascalString, count));
count = 1;
break;
case 'P': // void *
res.Add(new Format(FormatType.Pointer, count));
count = 1;
break;
case ' ': // white space, ignore
case '\t':
break;
case '=': // native
if (i != 0) throw Error(context, "unexpected byte order");
fStandardized = true;
break;
case '@': // native
if (i != 0) throw Error(context, "unexpected byte order");
break;
case '<': // little endian
if (i != 0) throw Error(context, "unexpected byte order");
fLittleEndian = true;
fStandardized = true;
break;
case '>': // big endian
case '!': // big endian
if (i != 0) throw Error(context, "unexpected byte order");
fLittleEndian = false;
fStandardized = true;
break;
default:
if (Char.IsDigit(fmt[i])) {
count = 0;
while (Char.IsDigit(fmt[i])) {
count = count * 10 + (fmt[i] - '0');
i++;
}
if (Char.IsWhiteSpace(fmt[i])) Error(context, "white space not allowed between count and format");
i--;
break;
}
throw Error(context, "bad format string");
}
}
// store the new formats
_formats = res.ToArray();
_isStandardized = fStandardized;
_isLittleEndian = fLittleEndian;
_encodingSize = _encodingCount = 0;
for (int i = 0; i < _formats.Length; i++) {
if (_formats[i].Type != FormatType.PadByte) {
if (_formats[i].Type != FormatType.CString && _formats[i].Type != FormatType.PascalString) {
_encodingCount += _formats[i].Count;
} else {
_encodingCount++;
}
}
if (!_isStandardized) {
// In native mode, align to {size}-byte boundaries
_encodingSize = Align(_encodingSize, _formats[i].NativeSize);
}
_encodingSize += GetNativeSize(_formats[i].Type) * _formats[i].Count;
}
lock (_cache) {
_cache.Add(fmt, this);
}
}
#endregion
#region Internal helpers
internal static Struct Create(string/*!*/ format) {
Struct res = new Struct();
res.__init__(DefaultContext.Default, format); // default context is only used for errors, this better be an error free format.
return res;
}
#endregion
}
#endregion
#region Compiled Format
/// <summary>
/// Enum which specifies the format type for a compiled struct
/// </summary>
private enum FormatType {
None,
PadByte,
Bool,
Char,
SignedChar,
UnsignedChar,
Short,
UnsignedShort,
Int,
UnsignedInt,
UnsignedLong,
Float,
LongLong,
UnsignedLongLong,
Double,
CString,
PascalString,
Pointer,
}
private static int GetNativeSize(FormatType c) {
switch (c) {
case FormatType.Char:
case FormatType.SignedChar:
case FormatType.UnsignedChar:
case FormatType.PadByte:
case FormatType.Bool:
case FormatType.CString:
case FormatType.PascalString:
return 1;
case FormatType.Short:
case FormatType.UnsignedShort:
return 2;
case FormatType.Int:
case FormatType.UnsignedInt:
case FormatType.UnsignedLong:
case FormatType.Float:
return 4;
case FormatType.LongLong:
case FormatType.UnsignedLongLong:
case FormatType.Double:
return 8;
case FormatType.Pointer:
return IntPtr.Size;
default:
throw new InvalidOperationException(c.ToString());
}
}
/// <summary>
/// Struct used to store the format and the number of times it should be repeated.
/// </summary>
private struct Format {
public FormatType Type;
public int Count;
public Format(FormatType type, int count) {
Type = type;
Count = count;
}
public int NativeSize {
get {
return GetNativeSize(Type);
}
}
}
#endregion
#region Cache of compiled struct patterns
private const int MAX_CACHE_SIZE = 1024;
private static CacheDict<string, Struct> _cache = new CacheDict<string, Struct>(MAX_CACHE_SIZE);
private static Struct GetStructFromCache(CodeContext/*!*/ context, [NotNull] string fmt/*!*/) {
Struct s;
bool gotIt;
lock (_cache) {
gotIt = _cache.TryGetValue(fmt, out s);
}
if (!gotIt) {
s = new Struct(context, fmt);
}
return s;
}
[Documentation("Clear the internal cache.")]
public static void _clearcache() {
_cache = new CacheDict<string, Struct>(MAX_CACHE_SIZE);
}
[Documentation("int(x[, base]) -> integer\n\nConvert a string or number to an integer, if possible. A floating point\nargument will be truncated towards zero (this does not include a string\nrepresentation of a floating point number!) When converting a string, use\nthe optional base. It is an error to supply a base when converting a\nnon-string. If base is zero, the proper base is guessed based on the\nstring content. If the argument is outside the integer range a\nlong object will be returned instead.")]
public static int calcsize(CodeContext/*!*/ context, [NotNull]string fmt) {
return GetStructFromCache(context, fmt).size;
}
[Documentation("Return string containing values v1, v2, ... packed according to fmt.")]
public static string/*!*/ pack(CodeContext/*!*/ context, [BytesConversion][NotNull]string fmt/*!*/, params object[] values)
{
return GetStructFromCache(context, fmt).pack(context, values);
}
[Documentation("Pack the values v1, v2, ... according to fmt.\nWrite the packed bytes into the writable buffer buf starting at offset.")]
public static void pack_into(CodeContext/*!*/ context, [BytesConversion][NotNull]string/*!*/ fmt, [NotNull]ArrayModule.array/*!*/ buffer, int offset, params object[] args)
{
GetStructFromCache(context, fmt).pack_into(context, buffer, offset, args);
}
[Documentation("Unpack the string containing packed C structure data, according to fmt.\nRequires len(string) == calcsize(fmt).")]
public static PythonTuple/*!*/ unpack(CodeContext/*!*/ context, [BytesConversion][NotNull]string/*!*/ fmt, [BytesConversion][NotNull]string/*!*/ @string)
{
return GetStructFromCache(context, fmt).unpack(context, @string);
}
[Documentation("Unpack the string containing packed C structure data, according to fmt.\nRequires len(string) == calcsize(fmt).")]
public static PythonTuple/*!*/ unpack(CodeContext/*!*/ context, [BytesConversion][NotNull]string/*!*/ fmt, [NotNull]ArrayModule.array/*!*/ buffer)
{
return GetStructFromCache(context, fmt).unpack(context, buffer);
}
[Documentation("Unpack the string containing packed C structure data, according to fmt.\nRequires len(string) == calcsize(fmt).")]
public static PythonTuple/*!*/ unpack(CodeContext/*!*/ context, [BytesConversion][NotNull]string fmt/*!*/, [NotNull]PythonBuffer/*!*/ buffer)
{
return GetStructFromCache(context, fmt).unpack(context, buffer);
}
[Documentation("Unpack the buffer, containing packed C structure data, according to\nfmt, starting at offset. Requires len(buffer[offset:]) >= calcsize(fmt).")]
public static PythonTuple/*!*/ unpack_from(CodeContext/*!*/ context, [BytesConversion][NotNull]string fmt/*!*/, [NotNull]ArrayModule.array/*!*/ buffer, [DefaultParameterValue(0)] int offset)
{
return GetStructFromCache(context, fmt).unpack_from(context, buffer, offset);
}
[Documentation("Unpack the buffer, containing packed C structure data, according to\nfmt, starting at offset. Requires len(buffer[offset:]) >= calcsize(fmt).")]
public static PythonTuple/*!*/ unpack_from(CodeContext/*!*/ context, [BytesConversion][NotNull]string fmt/*!*/, [BytesConversion][NotNull]string/*!*/ buffer, [DefaultParameterValue(0)] int offset)
{
return GetStructFromCache(context, fmt).unpack_from(context, buffer, offset);
}
[Documentation("Unpack the buffer, containing packed C structure data, according to\nfmt, starting at offset. Requires len(buffer[offset:]) >= calcsize(fmt).")]
public static PythonTuple/*!*/ unpack_from(CodeContext/*!*/ context, [BytesConversion][NotNull]string fmt/*!*/, [NotNull]PythonBuffer/*!*/ buffer, [DefaultParameterValue(0)] int offset)
{
return GetStructFromCache(context, fmt).unpack_from(context, buffer, offset);
}
#endregion
#region Write Helpers
private static void WriteShort(StringBuilder res, bool fLittleEndian, short val) {
if (fLittleEndian) {
res.Append((char)(val & 0xff));
res.Append((char)((val >> 8) & 0xff));
} else {
res.Append((char)((val >> 8) & 0xff));
res.Append((char)(val & 0xff));
}
}
private static void WriteUShort(StringBuilder res, bool fLittleEndian, ushort val) {
if (fLittleEndian) {
res.Append((char)(val & 0xff));
res.Append((char)((val >> 8) & 0xff));
} else {
res.Append((char)((val >> 8) & 0xff));
res.Append((char)(val & 0xff));
}
}
private static void WriteInt(StringBuilder res, bool fLittleEndian, int val) {
if (fLittleEndian) {
res.Append((char)(val & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 24) & 0xff));
} else {
res.Append((char)((val >> 24) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)(val & 0xff));
}
}
private static void WriteUInt(StringBuilder res, bool fLittleEndian, uint val) {
if (fLittleEndian) {
res.Append((char)(val & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 24) & 0xff));
} else {
res.Append((char)((val >> 24) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)(val & 0xff));
}
}
private static void WritePointer(StringBuilder res, bool fLittleEndian, IntPtr val) {
if (IntPtr.Size == 4) {
WriteInt(res, fLittleEndian, val.ToInt32());
} else {
WriteLong(res, fLittleEndian, val.ToInt64());
}
}
private static void WriteFloat(StringBuilder res, bool fLittleEndian, float val) {
byte[] bytes = BitConverter.GetBytes(val);
if (fLittleEndian) {
res.Append((char)bytes[0]);
res.Append((char)bytes[1]);
res.Append((char)bytes[2]);
res.Append((char)bytes[3]);
} else {
res.Append((char)bytes[3]);
res.Append((char)bytes[2]);
res.Append((char)bytes[1]);
res.Append((char)bytes[0]);
}
}
private static void WriteLong(StringBuilder res, bool fLittleEndian, long val) {
if (fLittleEndian) {
res.Append((char)(val & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 24) & 0xff));
res.Append((char)((val >> 32) & 0xff));
res.Append((char)((val >> 40) & 0xff));
res.Append((char)((val >> 48) & 0xff));
res.Append((char)((val >> 56) & 0xff));
} else {
res.Append((char)((val >> 56) & 0xff));
res.Append((char)((val >> 48) & 0xff));
res.Append((char)((val >> 40) & 0xff));
res.Append((char)((val >> 32) & 0xff));
res.Append((char)((val >> 24) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)(val & 0xff));
}
}
private static void WriteULong(StringBuilder res, bool fLittleEndian, ulong val) {
if (fLittleEndian) {
res.Append((char)(val & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 24) & 0xff));
res.Append((char)((val >> 32) & 0xff));
res.Append((char)((val >> 40) & 0xff));
res.Append((char)((val >> 48) & 0xff));
res.Append((char)((val >> 56) & 0xff));
} else {
res.Append((char)((val >> 56) & 0xff));
res.Append((char)((val >> 48) & 0xff));
res.Append((char)((val >> 40) & 0xff));
res.Append((char)((val >> 32) & 0xff));
res.Append((char)((val >> 24) & 0xff));
res.Append((char)((val >> 16) & 0xff));
res.Append((char)((val >> 8) & 0xff));
res.Append((char)(val & 0xff));
}
}
private static void WriteDouble(StringBuilder res, bool fLittleEndian, double val) {
byte[] bytes = BitConverter.GetBytes(val);
if (fLittleEndian) {
res.Append((char)bytes[0]);
res.Append((char)bytes[1]);
res.Append((char)bytes[2]);
res.Append((char)bytes[3]);
res.Append((char)bytes[4]);
res.Append((char)bytes[5]);
res.Append((char)bytes[6]);
res.Append((char)bytes[7]);
} else {
res.Append((char)bytes[7]);
res.Append((char)bytes[6]);
res.Append((char)bytes[5]);
res.Append((char)bytes[4]);
res.Append((char)bytes[3]);
res.Append((char)bytes[2]);
res.Append((char)bytes[1]);
res.Append((char)bytes[0]);
}
}
private static void WriteString(StringBuilder res, int len, string val) {
for (int i = 0; i < val.Length && i < len; i++) {
res.Append(val[i]);
}
for (int i = val.Length; i < len; i++) {
res.Append('\0');
}
}
private static void WritePascalString(StringBuilder res, int len, string val) {
int lenByte = Math.Min(255, Math.Min(val.Length, len));
res.Append((char)lenByte);
for (int i = 0; i < val.Length && i < len; i++) {
res.Append(val[i]);
}
for (int i = val.Length; i < len; i++) {
res.Append('\0');
}
}
#endregion
#region Data getter helpers
internal static bool GetBoolValue(CodeContext/*!*/ context, int index, object[] args) {
object val = GetValue(context, index, args);
object res;
if (Converter.TryConvert(val, typeof(bool), out res)) {
return (bool)res;
}
// Should never happen
throw Error(context, "expected bool value got " + val.ToString());
}
internal static char GetCharValue(CodeContext/*!*/ context, int index, object[] args) {
string val = GetValue(context, index, args) as string;
if (val == null || val.Length != 1) throw Error(context, "char format requires string of length 1");
return val[0];
}
internal static sbyte GetSByteValue(CodeContext/*!*/ context, int index, object[] args) {
object val = GetValue(context, index, args);
sbyte res;
if (Converter.TryConvertToSByte(val, out res)) {
return res;
}
throw Error(context, "expected sbyte value got " + val.ToString());
}
internal static byte GetByteValue(CodeContext/*!*/ context, int index, object[] args) {
object val = GetValue(context, index, args);
byte res;
if (Converter.TryConvertToByte(val, out res)) return res;
char cres;
if (Converter.TryConvertToChar(val, out cres)) return (byte)cres;
throw Error(context, "expected byte value got " + val.ToString());
}
internal static short GetShortValue(CodeContext/*!*/ context, int index, object[] args) {
object val = GetValue(context, index, args);
short res;
if (Converter.TryConvertToInt16(val, out res)) return res;
throw Error(context, "expected short value");
}
internal static ushort GetUShortValue(CodeContext/*!*/ context, int index, object[] args) {
object val = GetValue(context, index, args);
ushort res;
if (Converter.TryConvertToUInt16(val, out res)) return res;
throw Error(context, "expected ushort value");
}
internal static int GetIntValue(CodeContext/*!*/ context, int index, object[] args) {
object val = GetValue(context, index, args);
int res;
if (Converter.TryConvertToInt32(val, out res)) return res;
throw Error(context, "expected int value");
}
internal static uint GetUIntValue(CodeContext/*!*/ context, bool isStandardized, int index, object[] args) {
object val = GetValue(context, index, args);
uint res;
if (Converter.TryConvertToUInt32(val, out res)) {
return res;
}
if (isStandardized) {
throw Error(context, "expected unsigned long value");
}
PythonOps.Warn(context, PythonExceptions.DeprecationWarning, "'I' format requires 0 <= number <= 4294967295");
return 0;
}
internal static uint GetULongValue(CodeContext/*!*/ context, bool isStandardized, int index, object[] args, string type) {
object val = GetValue(context, index, args);
uint res;
if (val is int) {
res = (uint)(int)val;
WarnRange(context, (int)val, isStandardized, type);
} else if (val is BigInteger) {
res = (uint)(((BigInteger)val) & 0xffffffff);
WarnRange(context, (BigInteger)val, isStandardized, type);
} else if (val is Extensible<int>) {
res = (uint)((Extensible<int>)val).Value;
WarnRange(context, ((Extensible<int>)val).Value, isStandardized, type);
} else if (val is Extensible<BigInteger>) {
res = (uint)(((Extensible<BigInteger>)val).Value & 0xffffffff);
BigInteger bi = ((Extensible<BigInteger>)val).Value;
WarnRange(context, bi, isStandardized, type);
} else {
PythonOps.Warn(context, PythonExceptions.DeprecationWarning, "struct integer overflow masking is deprecated");
object maskedValue = PythonContext.GetContext(context).Operation(PythonOperationKind.BitwiseAnd, val, (BigInteger)4294967295);
if (!Converter.TryConvertToUInt32(maskedValue, out res)) {
throw PythonOps.OverflowError("can't convert to " + type);
}
}
return res;
}
private static void WarnRange(CodeContext context, int val, bool isStandardized, string type) {
if (val < 0) {
WarnRange(context, isStandardized, type);
}
}
private static void WarnRange(CodeContext context, BigInteger bi, bool isStandardized, string type) {
if (bi < 0 || bi > 4294967295) {
WarnRange(context, isStandardized, type);
}
}
private static void WarnRange(CodeContext context, bool isStandardized, string type) {
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