public static BigIntToString ( PeterO.Numbers.EInteger bigint ) : string | ||
bigint | PeterO.Numbers.EInteger | |
Результат | string |
public CBORObject ReadForFirstByte( int firstbyte, CBORTypeFilter filter) { if (this.depth > 500) { throw new CBORException("Too deeply nested"); } if (firstbyte < 0) { throw new CBORException("Premature end of data"); } if (firstbyte == 0xff) { throw new CBORException("Unexpected break code encountered"); } int type = (firstbyte >> 5) & 0x07; int additional = firstbyte & 0x1f; int expectedLength = CBORObject.GetExpectedLength(firstbyte); // Data checks if (expectedLength == -1) { // if the head byte is invalid throw new CBORException("Unexpected data encountered"); } if (filter != null) { // Check for valid major types if asked if (!filter.MajorTypeMatches(type)) { throw new CBORException("Unexpected data type encountered"); } if (firstbyte >= 0xe0 && firstbyte <= 0xff && firstbyte != 0xf9 && firstbyte != 0xfa && firstbyte != 0xfb) { if (!filter.NonFPSimpleValueAllowed()) { throw new CBORException("Unexpected data type encountered"); } } } // Check if this represents a fixed object CBORObject fixedObject = CBORObject.GetFixedObject(firstbyte); if (fixedObject != null) { return(fixedObject); } // Read fixed-length data byte[] data = null; if (expectedLength != 0) { data = new byte[expectedLength]; // include the first byte because GetFixedLengthObject // will assume it exists for some head bytes data[0] = unchecked ((byte)firstbyte); if (expectedLength > 1 && this.stream.Read(data, 1, expectedLength - 1) != expectedLength - 1) { throw new CBORException("Premature end of data"); } CBORObject cbor = CBORObject.GetFixedLengthObject(firstbyte, data); if (this.stringRefs != null && (type == 2 || type == 3)) { this.stringRefs.AddStringIfNeeded(cbor, expectedLength - 1); } return(cbor); } var uadditional = (long)additional; EInteger bigintAdditional = EInteger.Zero; var hasBigAdditional = false; data = new byte[8]; var lowAdditional = 0; switch (firstbyte & 0x1f) { case 24: { int tmp = this.stream.ReadByte(); if (tmp < 0) { throw new CBORException("Premature end of data"); } lowAdditional = tmp; uadditional = lowAdditional; break; } case 25: { if (this.stream.Read(data, 0, 2) != 2) { throw new CBORException("Premature end of data"); } lowAdditional = ((int)(data[0] & (int)0xff)) << 8; lowAdditional |= (int)(data[1] & (int)0xff); uadditional = lowAdditional; break; } case 26: { if (this.stream.Read(data, 0, 4) != 4) { throw new CBORException("Premature end of data"); } uadditional = ((long)(data[0] & (long)0xff)) << 24; uadditional |= ((long)(data[1] & (long)0xff)) << 16; uadditional |= ((long)(data[2] & (long)0xff)) << 8; uadditional |= (long)(data[3] & (long)0xff); break; } case 27: { if (this.stream.Read(data, 0, 8) != 8) { throw new CBORException("Premature end of data"); } if ((((int)data[0]) & 0x80) != 0) { // Won't fit in a signed 64-bit number var uabytes = new byte[9]; uabytes[0] = data[7]; uabytes[1] = data[6]; uabytes[2] = data[5]; uabytes[3] = data[4]; uabytes[4] = data[3]; uabytes[5] = data[2]; uabytes[6] = data[1]; uabytes[7] = data[0]; uabytes[8] = 0; hasBigAdditional = true; bigintAdditional = EInteger.FromBytes(uabytes, true); } else { uadditional = ((long)(data[0] & (long)0xff)) << 56; uadditional |= ((long)(data[1] & (long)0xff)) << 48; uadditional |= ((long)(data[2] & (long)0xff)) << 40; uadditional |= ((long)(data[3] & (long)0xff)) << 32; uadditional |= ((long)(data[4] & (long)0xff)) << 24; uadditional |= ((long)(data[5] & (long)0xff)) << 16; uadditional |= ((long)(data[6] & (long)0xff)) << 8; uadditional |= (long)(data[7] & (long)0xff); } break; } } // The following doesn't check for major types 0 and 1, // since all of them are fixed-length types and are // handled in the call to GetFixedLengthObject. if (type == 2) // Byte string { if (additional == 31) { // Streaming byte string using (var ms = new MemoryStream()) { // Requires same type as this one while (true) { int nextByte = this.stream.ReadByte(); if (nextByte == 0xff) { // break if the "break" code was read break; } long len = ReadDataLength(this.stream, nextByte, 2); if ((len >> 63) != 0 || len > Int32.MaxValue) { throw new CBORException("Length" + ToUnsignedBigInteger(len) + " is bigger than supported "); } if (nextByte != 0x40) { // NOTE: 0x40 means the empty byte string ReadByteData(this.stream, len, ms); } } if (ms.Position > Int32.MaxValue) { throw new CBORException("Length of bytes to be streamed is bigger than supported "); } data = ms.ToArray(); return(new CBORObject( CBORObject.CBORObjectTypeByteString, data)); } } else { if (hasBigAdditional) { throw new CBORException("Length of " + CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported"); } if (uadditional > Int32.MaxValue) { throw new CBORException("Length of " + CBORUtilities.LongToString(uadditional) + " is bigger than supported"); } data = ReadByteData(this.stream, uadditional, null); var cbor = new CBORObject(CBORObject.CBORObjectTypeByteString, data); if (this.stringRefs != null) { int hint = (uadditional > Int32.MaxValue || hasBigAdditional) ? Int32.MaxValue : (int)uadditional; this.stringRefs.AddStringIfNeeded(cbor, hint); } return(cbor); } } if (type == 3) // Text string { if (additional == 31) { // Streaming text string var builder = new StringBuilder(); while (true) { int nextByte = this.stream.ReadByte(); if (nextByte == 0xff) { // break if the "break" code was read break; } long len = ReadDataLength(this.stream, nextByte, 3); if ((len >> 63) != 0 || len > Int32.MaxValue) { throw new CBORException("Length" + ToUnsignedBigInteger(len) + " is bigger than supported"); } if (nextByte != 0x60) { // NOTE: 0x60 means the empty string if (PropertyMap.ExceedsKnownLength(this.stream, len)) { throw new CBORException("Premature end of data"); } switch ( DataUtilities.ReadUtf8( this.stream, (int)len, builder, false)) { case -1: throw new CBORException("Invalid UTF-8"); case -2: throw new CBORException("Premature end of data"); } } } return(new CBORObject( CBORObject.CBORObjectTypeTextString, builder.ToString())); } else { if (hasBigAdditional) { throw new CBORException("Length of " + CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported"); } if (uadditional > Int32.MaxValue) { throw new CBORException("Length of " + CBORUtilities.LongToString(uadditional) + " is bigger than supported"); } if (PropertyMap.ExceedsKnownLength(this.stream, uadditional)) { throw new CBORException("Premature end of data"); } var builder = new StringBuilder(); switch ( DataUtilities.ReadUtf8( this.stream, (int)uadditional, builder, false)) { case -1: throw new CBORException("Invalid UTF-8"); case -2: throw new CBORException("Premature end of data"); } var cbor = new CBORObject( CBORObject.CBORObjectTypeTextString, builder.ToString()); if (this.stringRefs != null) { int hint = (uadditional > Int32.MaxValue || hasBigAdditional) ? Int32.MaxValue : (int)uadditional; this.stringRefs.AddStringIfNeeded(cbor, hint); } return(cbor); } } if (type == 4) // Array { CBORObject cbor = CBORObject.NewArray(); if (additional == 31) { var vtindex = 0; // Indefinite-length array while (true) { int headByte = this.stream.ReadByte(); if (headByte < 0) { throw new CBORException("Premature end of data"); } if (headByte == 0xff) { // Break code was read break; } if (filter != null && !filter.ArrayIndexAllowed(vtindex)) { throw new CBORException("Array is too long"); } ++this.depth; CBORObject o = this.ReadForFirstByte( headByte, filter == null ? null : filter.GetSubFilter(vtindex)); --this.depth; cbor.Add(o); ++vtindex; } return(cbor); } if (hasBigAdditional) { throw new CBORException("Length of " + CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported"); } if (uadditional > Int32.MaxValue) { throw new CBORException("Length of " + CBORUtilities.LongToString(uadditional) + " is bigger than supported"); } if (filter != null && !filter.ArrayLengthMatches(uadditional)) { throw new CBORException("Array is too long"); } if (PropertyMap.ExceedsKnownLength(this.stream, uadditional)) { throw new CBORException("Remaining data too small for array length"); } ++this.depth; for (long i = 0; i < uadditional; ++i) { cbor.Add( this.Read(filter == null ? null : filter.GetSubFilter(i))); } --this.depth; return(cbor); } if (type == 5) // Map, type 5 { CBORObject cbor = CBORObject.NewMap(); if (additional == 31) { // Indefinite-length map while (true) { int headByte = this.stream.ReadByte(); if (headByte < 0) { throw new CBORException("Premature end of data"); } if (headByte == 0xff) { // Break code was read break; } ++this.depth; CBORObject key = this.ReadForFirstByte(headByte, null); CBORObject value = this.Read(null); --this.depth; if (this.policy == CBORDuplicatePolicy.Disallow) { if (cbor.ContainsKey(key)) { throw new CBORException("Duplicate key already exists: " + key); } } cbor[key] = value; } return(cbor); } if (hasBigAdditional) { throw new CBORException("Length of " + CBORUtilities.BigIntToString(bigintAdditional) + " is bigger than supported"); } if (uadditional > Int32.MaxValue) { throw new CBORException("Length of " + CBORUtilities.LongToString(uadditional) + " is bigger than supported"); } if (PropertyMap.ExceedsKnownLength(this.stream, uadditional)) { throw new CBORException("Remaining data too small for map length"); } for (long i = 0; i < uadditional; ++i) { ++this.depth; CBORObject key = this.Read(null); CBORObject value = this.Read(null); --this.depth; if (this.policy == CBORDuplicatePolicy.Disallow) { if (cbor.ContainsKey(key)) { throw new CBORException("Duplicate key already exists: " + key); } } cbor[key] = value; } return(cbor); } if (type == 6) // Tagged item { ICBORTag taginfo = null; var haveFirstByte = false; var newFirstByte = -1; if (!hasBigAdditional) { if (filter != null && !filter.TagAllowed(uadditional)) { throw new CBORException("Unexpected tag encountered: " + uadditional); } int uad = uadditional >= 257 ? 257 : (uadditional < 0 ? 0 : (int)uadditional); switch (uad) { case 256: // Tag 256: String namespace this.stringRefs = this.stringRefs ?? (new StringRefs()); this.stringRefs.Push(); break; case 25: // String reference if (this.stringRefs == null) { throw new CBORException("No stringref namespace"); } break; case 28: case 29: this.hasSharableObjects = true; break; } taginfo = CBORObject.FindTagConverterLong(uadditional); } else { if (filter != null && !filter.TagAllowed(bigintAdditional)) { throw new CBORException("Unexpected tag encountered: " + uadditional); } taginfo = CBORObject.FindTagConverter(bigintAdditional); } ++this.depth; CBORObject o = haveFirstByte ? this.ReadForFirstByte( newFirstByte, taginfo == null ? null : taginfo.GetTypeFilter()) : this.Read(taginfo == null ? null : taginfo.GetTypeFilter()); --this.depth; if (hasBigAdditional) { return(CBORObject.FromObjectAndTag(o, bigintAdditional)); } if (uadditional < 65536) { int uaddl = uadditional >= 257 ? 257 : (uadditional < 0 ? 0 : (int)uadditional); switch (uaddl) { case 256: // string tag this.stringRefs.Pop(); break; case 25: // stringref tag return(this.stringRefs.GetString(o.AsEInteger())); } return(CBORObject.FromObjectAndTag( o, (int)uadditional)); } return(CBORObject.FromObjectAndTag( o, (EInteger)uadditional)); } throw new CBORException("Unexpected data encountered"); }
internal static void WriteJSONToInternal( CBORObject obj, StringOutput writer) { int type = obj.ItemType; object thisItem = obj.ThisItem; switch (type) { case CBORObject.CBORObjectTypeSimpleValue: { if (obj.IsTrue) { writer.WriteString("true"); return; } if (obj.IsFalse) { writer.WriteString("false"); return; } writer.WriteString("null"); return; } case CBORObject.CBORObjectTypeSingle: { var f = (float)thisItem; if (Single.IsNegativeInfinity(f) || Single.IsPositiveInfinity(f) || Single.IsNaN(f)) { writer.WriteString("null"); return; } writer.WriteString( CBORObject.TrimDotZero( CBORUtilities.SingleToString(f))); return; } case CBORObject.CBORObjectTypeDouble: { var f = (double)thisItem; if (Double.IsNegativeInfinity(f) || Double.IsPositiveInfinity(f) || Double.IsNaN(f)) { writer.WriteString("null"); return; } string dblString = CBORUtilities.DoubleToString(f); writer.WriteString( CBORObject.TrimDotZero(dblString)); return; } case CBORObject.CBORObjectTypeInteger: { var longItem = (long)thisItem; writer.WriteString(CBORUtilities.LongToString(longItem)); return; } case CBORObject.CBORObjectTypeBigInteger: { writer.WriteString( CBORUtilities.BigIntToString((EInteger)thisItem)); return; } case CBORObject.CBORObjectTypeExtendedDecimal: { var dec = (EDecimal)thisItem; if (dec.IsInfinity() || dec.IsNaN()) { writer.WriteString("null"); } else { writer.WriteString(dec.ToString()); } return; } case CBORObject.CBORObjectTypeExtendedFloat: { var flo = (EFloat)thisItem; if (flo.IsInfinity() || flo.IsNaN()) { writer.WriteString("null"); return; } if (flo.IsFinite && flo.Exponent.Abs().CompareTo((EInteger)2500) > 0) { // Too inefficient to convert to a decimal number // from a bigfloat with a very high exponent, // so convert to double instead double f = flo.ToDouble(); if (Double.IsNegativeInfinity(f) || Double.IsPositiveInfinity(f) || Double.IsNaN(f)) { writer.WriteString("null"); return; } string dblString = CBORUtilities.DoubleToString(f); writer.WriteString( CBORObject.TrimDotZero(dblString)); return; } writer.WriteString(flo.ToString()); return; } case CBORObject.CBORObjectTypeByteString: { var byteArray = (byte[])thisItem; if (byteArray.Length == 0) { writer.WriteString("\"\""); return; } writer.WriteCodePoint((int)'\"'); if (obj.HasTag(22)) { Base64.WriteBase64( writer, byteArray, 0, byteArray.Length, false); } else if (obj.HasTag(23)) { // Write as base16 for (int i = 0; i < byteArray.Length; ++i) { writer.WriteCodePoint((int)Hex16[(byteArray[i] >> 4) & 15]); writer.WriteCodePoint((int)Hex16[byteArray[i] & 15]); } } else { Base64.WriteBase64URL( writer, byteArray, 0, byteArray.Length, false); } writer.WriteCodePoint((int)'\"'); break; } case CBORObject.CBORObjectTypeTextString: { var thisString = (string)thisItem; if (thisString.Length == 0) { writer.WriteString("\"\""); return; } writer.WriteCodePoint((int)'\"'); WriteJSONStringUnquoted(thisString, writer); writer.WriteCodePoint((int)'\"'); break; } case CBORObject.CBORObjectTypeArray: { var first = true; writer.WriteCodePoint((int)'['); foreach (CBORObject i in obj.AsList()) { if (!first) { writer.WriteCodePoint((int)','); } WriteJSONToInternal(i, writer); first = false; } writer.WriteCodePoint((int)']'); break; } case CBORObject.CBORObjectTypeExtendedRational: { var dec = (ERational)thisItem; EDecimal f = dec.ToEDecimalExactIfPossible( EContext.Decimal128.WithUnlimitedExponents()); if (!f.IsFinite) { writer.WriteString("null"); } else { writer.WriteString(f.ToString()); } break; } case CBORObject.CBORObjectTypeMap: { var first = true; var hasNonStringKeys = false; IDictionary <CBORObject, CBORObject> objMap = obj.AsMap(); foreach (KeyValuePair <CBORObject, CBORObject> entry in objMap) { CBORObject key = entry.Key; if (key.ItemType != CBORObject.CBORObjectTypeTextString) { hasNonStringKeys = true; break; } } if (!hasNonStringKeys) { writer.WriteCodePoint((int)'{'); foreach (KeyValuePair <CBORObject, CBORObject> entry in objMap) { CBORObject key = entry.Key; CBORObject value = entry.Value; if (!first) { writer.WriteCodePoint((int)','); } writer.WriteCodePoint((int)'\"'); WriteJSONStringUnquoted((string)key.ThisItem, writer); writer.WriteCodePoint((int)'\"'); writer.WriteCodePoint((int)':'); WriteJSONToInternal(value, writer); first = false; } writer.WriteCodePoint((int)'}'); } else { // This map has non-string keys IDictionary <string, CBORObject> stringMap = new Dictionary <string, CBORObject>(); // Copy to a map with String keys, since // some keys could be duplicates // when serialized to strings foreach (KeyValuePair <CBORObject, CBORObject> entry in objMap) { CBORObject key = entry.Key; CBORObject value = entry.Value; string str = (key.ItemType == CBORObject.CBORObjectTypeTextString) ? ((string)key.ThisItem) : key.ToJSONString(); stringMap[str] = value; } first = true; writer.WriteCodePoint((int)'{'); foreach (KeyValuePair <string, CBORObject> entry in stringMap) { string key = entry.Key; CBORObject value = entry.Value; if (!first) { writer.WriteCodePoint((int)','); } writer.WriteCodePoint((int)'\"'); WriteJSONStringUnquoted((string)key, writer); writer.WriteCodePoint((int)'\"'); writer.WriteCodePoint((int)':'); WriteJSONToInternal(value, writer); first = false; } writer.WriteCodePoint((int)'}'); } break; } default: throw new InvalidOperationException("Unexpected item type"); } }