internal static CBORObject ParseSmallNumber(int digit, JSONOptions options) { #if DEBUG if (digit < 0) { throw new ArgumentException("digit (" + digit + ") is not greater" + "\u0020or equal to 0"); } #endif if (options != null && options.NumberConversion == JSONOptions.ConversionMode.Double) { return(CBORObject.FromFloatingPointBits( CBORUtilities.IntegerToDoubleBits(digit), 8)); } else if (options != null && options.NumberConversion == JSONOptions.ConversionMode.Decimal128) { return(CBORObject.FromObject(EDecimal.FromInt32(digit))); } else { // NOTE: Assumes digit is nonnegative, so PreserveNegativeZeros is irrelevant return(CBORObject.FromObject(digit)); } }
internal static CBORObject ParseJSONNumber( string chars, int offset, int count, JSONOptions options, int[] endOfNumber) { if (chars == null || chars.Length == 0 || count <= 0) { return(null); } if (offset < 0 || offset > chars.Length) { return(null); } if (count > chars.Length || chars.Length - offset < count) { return(null); } JSONOptions opt = options ?? CBORDataUtilities.DefaultOptions; bool preserveNegativeZero = options.PreserveNegativeZero; JSONOptions.ConversionMode kind = options.NumberConversion; int endPos = offset + count; int initialOffset = offset; var negative = false; if (chars[initialOffset] == '-') { ++offset; negative = true; } int numOffset = offset; var haveDecimalPoint = false; var haveDigits = false; var haveDigitsAfterDecimal = false; var haveExponent = false; int i = offset; var decimalPointPos = -1; // Check syntax int k = i; if (endPos - 1 > k && chars[k] == '0' && chars[k + 1] >= '0' && chars[k + 1] <= '9') { if (endOfNumber != null) { endOfNumber[0] = k + 2; } return(null); } for (; k < endPos; ++k) { char c = chars[k]; if (c >= '0' && c <= '9') { haveDigits = true; haveDigitsAfterDecimal |= haveDecimalPoint; } else if (c == '.') { if (!haveDigits || haveDecimalPoint) { // no digits before the decimal point, // or decimal point already seen if (endOfNumber != null) { endOfNumber[0] = k; } return(null); } haveDecimalPoint = true; decimalPointPos = k; } else if (c == 'E' || c == 'e') { ++k; haveExponent = true; break; } else { if (endOfNumber != null) { endOfNumber[0] = k; // Check if character can validly appear after a JSON number if (c != ',' && c != ']' && c != '}' && c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09) { return(null); } else { endPos = k; break; } } return(null); } } if (!haveDigits || (haveDecimalPoint && !haveDigitsAfterDecimal)) { if (endOfNumber != null) { endOfNumber[0] = k; } return(null); } var exponentPos = -1; var negativeExp = false; if (haveExponent) { haveDigits = false; if (k == endPos) { if (endOfNumber != null) { endOfNumber[0] = k; } return(null); } char c = chars[k]; if (c == '+') { ++k; } else if (c == '-') { negativeExp = true; ++k; } for (; k < endPos; ++k) { c = chars[k]; if (c >= '0' && c <= '9') { if (exponentPos < 0 && c != '0') { exponentPos = k; } haveDigits = true; } else if (endOfNumber != null) { endOfNumber[0] = k; // Check if character can validly appear after a JSON number if (c != ',' && c != ']' && c != '}' && c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09) { return(null); } else { endPos = k; break; } } else { return(null); } } if (!haveDigits) { if (endOfNumber != null) { endOfNumber[0] = k; } return(null); } } if (endOfNumber != null) { endOfNumber[0] = endPos; } if (exponentPos >= 0 && endPos - exponentPos > 20) { // Exponent too high for precision to overcome (which // has a length no bigger than Int32.MaxValue, which is 10 digits // long) if (negativeExp) { // underflow if (kind == JSONOptions.ConversionMode.Double || kind == JSONOptions.ConversionMode.IntOrFloat) { if (!negative) { return(CBORObject.FromFloatingPointBits(0, 2)); } else { return(CBORObject.FromFloatingPointBits(0x8000, 2)); } } else if (kind == JSONOptions.ConversionMode.IntOrFloatFromDouble) { return(CBORObject.FromObject(0)); } } else { // overflow if (kind == JSONOptions.ConversionMode.Double || kind == JSONOptions.ConversionMode.IntOrFloatFromDouble || kind == JSONOptions.ConversionMode.IntOrFloat) { return(CBORObject.FromFloatingPointBits( negative ? DoubleNegInfinity : DoublePosInfinity, 8)); } else if (kind == JSONOptions.ConversionMode.Decimal128) { return(CBORObject.FromObject(negative ? EDecimal.NegativeInfinity : EDecimal.PositiveInfinity)); } } } if (!haveExponent && !haveDecimalPoint && (endPos - numOffset) <= 16) { // Very common case of all-digit JSON number strings // less than 2^53 (with or without number sign) long v = 0L; int vi = numOffset; for (; vi < endPos; ++vi) { v = (v * 10) + (int)(chars[vi] - '0'); } if ((v != 0 || !negative) && v < (1L << 53) - 1) { if (negative) { v = -v; } if (kind == JSONOptions.ConversionMode.Double) { return(CBORObject.FromFloatingPointBits(EFloat.FromInt64(v).ToDoubleBits(), 8)); } else if (kind == JSONOptions.ConversionMode.Decimal128) { return(CBORObject.FromObject(EDecimal.FromInt64(v))); } else { return(CBORObject.FromObject(v)); } } } if (kind == JSONOptions.ConversionMode.Full) { if (!haveDecimalPoint && !haveExponent) { EInteger ei = EInteger.FromSubstring(chars, initialOffset, endPos); if (preserveNegativeZero && ei.IsZero && negative) { // TODO: In next major version, change to EDecimal.NegativeZero return(CBORObject.FromFloatingPointBits(0x8000, 2)); } return(CBORObject.FromObject(ei)); } if (!haveExponent && haveDecimalPoint) { // No more than 18 digits plus one decimal point (which // should fit a long) long lv = 0L; int expo = -(endPos - (decimalPointPos + 1)); int vi = numOffset; var digitCount = 0; for (; vi < decimalPointPos; ++vi) { if (digitCount < 0 || digitCount >= 18) { digitCount = -1; break; } else if (digitCount > 0 || chars[vi] != '0') { ++digitCount; } lv = checked ((lv * 10) + (int)(chars[vi] - '0')); } for (vi = decimalPointPos + 1; vi < endPos; ++vi) { if (digitCount < 0 || digitCount >= 18) { digitCount = -1; break; } else if (digitCount > 0 || chars[vi] != '0') { ++digitCount; } lv = checked ((lv * 10) + (int)(chars[vi] - '0')); } if (negative) { lv = -lv; } if (digitCount >= 0 && (!negative || lv != 0)) { if (expo == 0) { return(CBORObject.FromObject(lv)); } else { CBORObject cbor = CBORObject.FromArrayBackedObject( new CBORObject[] { CBORObject.FromObject(expo), CBORObject.FromObject(lv), }); return(cbor.WithTag(4)); } } } // DebugUtility.Log("convfull " + chars.Substring(initialOffset, endPos - // initialOffset)); EDecimal ed = EDecimal.FromString( chars, initialOffset, endPos - initialOffset); if (ed.IsZero && negative) { if (ed.Exponent.IsZero) { // TODO: In next major version, use EDecimal // for preserveNegativeZero return(preserveNegativeZero ? CBORObject.FromFloatingPointBits(0x8000, 2) : CBORObject.FromObject(0)); } else if (!preserveNegativeZero) { return(CBORObject.FromObject(ed.Negate())); } else { return(CBORObject.FromObject(ed)); } } else { return(ed.Exponent.IsZero ? CBORObject.FromObject(ed.Mantissa) : CBORObject.FromObject(ed)); } } else if (kind == JSONOptions.ConversionMode.Double) { EFloat ef = EFloat.FromString( chars, initialOffset, endPos - initialOffset, EContext.Binary64); long lb = ef.ToDoubleBits(); if (!preserveNegativeZero && (lb == 1L << 63 || lb == 0L)) { lb = 0L; } return(CBORObject.FromFloatingPointBits(lb, 8)); } else if (kind == JSONOptions.ConversionMode.Decimal128) { EDecimal ed = EDecimal.FromString( chars, initialOffset, endPos - initialOffset, EContext.Decimal128); if (!preserveNegativeZero && ed.IsNegative && ed.IsZero) { ed = ed.Negate(); } return(CBORObject.FromObject(ed)); } else if (kind == JSONOptions.ConversionMode.IntOrFloatFromDouble) { EFloat ef = EFloat.FromString( chars, initialOffset, endPos - initialOffset, EContext.Binary64); long lb = ef.ToDoubleBits(); return((!CBORUtilities.IsBeyondSafeRange(lb) && CBORUtilities.IsIntegerValue(lb)) ? CBORObject.FromObject(CBORUtilities.GetIntegerValue(lb)) : CBORObject.FromFloatingPointBits(lb, 8)); } else if (kind == JSONOptions.ConversionMode.IntOrFloat) { EContext ctx = EContext.Binary64.WithBlankFlags(); EFloat ef = EFloat.FromString( chars, initialOffset, endPos - initialOffset, ctx); long lb = ef.ToDoubleBits(); if ((ctx.Flags & EContext.FlagInexact) != 0) { // Inexact conversion to double, meaning that the string doesn't // represent an integer in [-(2^53)+1, 2^53), which is representable // exactly as double, so treat as ConversionMode.Double if (!preserveNegativeZero && (lb == 1L << 63 || lb == 0L)) { lb = 0L; } return(CBORObject.FromFloatingPointBits(lb, 8)); } else { // Exact conversion; treat as ConversionMode.IntToFloatFromDouble return((!CBORUtilities.IsBeyondSafeRange(lb) && CBORUtilities.IsIntegerValue(lb)) ? CBORObject.FromObject(CBORUtilities.GetIntegerValue(lb)) : CBORObject.FromFloatingPointBits(lb, 8)); } } else { throw new ArgumentException("Unsupported conversion kind."); } }
public CBORObject ReadForFirstByte(int firstbyte) { 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; long uadditional; CBORObject fixedObject; if (this.options.Ctap2Canonical) { if (additional >= 0x1c) { // NOTE: Includes stop byte and indefinite length data items throw new CBORException("Invalid canonical CBOR encountered"); } // Check if this represents a fixed object (NOTE: All fixed objects // comply with CTAP2 canonical CBOR). fixedObject = CBORObject.GetFixedObject(firstbyte); if (fixedObject != null) { return(fixedObject); } if (type == 6) { throw new CBORException("Tags not allowed in canonical CBOR"); } uadditional = ReadDataLength( this.stream, firstbyte, type, type == 7); if (type == 0) { return((uadditional >> 63) != 0 ? CBORObject.FromObject(ToUnsignedEInteger(uadditional)) : CBORObject.FromObject(uadditional)); } else if (type == 1) { return((uadditional >> 63) != 0 ? CBORObject.FromObject( ToUnsignedEInteger(uadditional).Add(1).Negate()) : CBORObject.FromObject((-uadditional) - 1L)); } else if (type == 7) { if (additional < 24) { return(CBORObject.FromSimpleValue(additional)); } else if (additional == 24 && uadditional < 32) { throw new CBORException("Invalid simple value encoding"); } else if (additional == 24) { return(CBORObject.FromSimpleValue((int)uadditional)); } else if (additional == 25) { return(CBORObject.FromFloatingPointBits(uadditional, 2)); } else if (additional == 26) { return(CBORObject.FromFloatingPointBits(uadditional, 4)); } else if (additional == 27) { return(CBORObject.FromFloatingPointBits(uadditional, 8)); } } else if (type >= 2 && type <= 5) { return(this.ReadStringArrayMap(type, uadditional)); } throw new CBORException("Unexpected data encountered"); } int expectedLength = CBORObject.GetExpectedLength(firstbyte); // Data checks if (expectedLength == -1) { // if the head byte is invalid throw new CBORException("Unexpected data encountered"); } // Check if this represents a fixed object 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); } if (additional == 31) { // Indefinite-length for major types 2 to 5 (other major // types were already handled in the call to // GetFixedLengthObject). switch (type) { case 2: { // 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" + ToUnsignedEInteger(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" + "\u0020than supported "); } data = ms.ToArray(); return(CBORObject.FromRaw(data)); } } case 3: { // 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" + ToUnsignedEInteger(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(CBORObject.FromRaw(builder.ToString())); } case 4: { CBORObject cbor = CBORObject.NewArray(); 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; } ++this.depth; CBORObject o = this.ReadForFirstByte( headByte); --this.depth; cbor.Add(o); ++vtindex; } return(cbor); } case 5: { CBORObject cbor = CBORObject.NewMap(); // 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); CBORObject value = this.ReadInternal(); --this.depth; int oldCount = cbor.Count; cbor[key] = value; int newCount = cbor.Count; if (!this.options.AllowDuplicateKeys && oldCount == newCount) { throw new CBORException("Duplicate key already exists"); } } return(cbor); } default: throw new CBORException("Unexpected data encountered"); } } EInteger bigintAdditional = EInteger.Zero; uadditional = ReadDataLength(this.stream, firstbyte, type); // 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 && type <= 5) { return(this.ReadStringArrayMap(type, uadditional)); } if (type == 6) // Tagged item { var haveFirstByte = false; var newFirstByte = -1; if (this.options.ResolveReferences && (uadditional >> 32) == 0) { // NOTE: HandleItemTag treats only certain tags up to 256 specially this.HandleItemTag(uadditional); } ++this.depth; CBORObject o = haveFirstByte ? this.ReadForFirstByte( newFirstByte) : this.ReadInternal(); --this.depth; if ((uadditional >> 63) != 0) { return(CBORObject.FromObjectAndTag(o, ToUnsignedEInteger(uadditional))); } if (uadditional < 65536) { if (this.options.ResolveReferences) { int uaddl = uadditional >= 257 ? 257 : (uadditional < 0 ? 0 : (int)uadditional); switch (uaddl) { case 256: // string tag this.stringRefs.Pop(); break; case 25: // stringref tag if (o.IsTagged || o.Type != CBORType.Integer) { throw new CBORException("stringref must be an unsigned" + "\u0020integer"); } return(this.stringRefs.GetString(o.AsEIntegerValue())); } } return(CBORObject.FromObjectAndTag( o, (int)uadditional)); } return(CBORObject.FromObjectAndTag( o, (EInteger)uadditional)); } throw new CBORException("Unexpected data encountered"); }
/// <summary>Converts a date/time in the form of a year, month, day, /// hour, minute, second, fractional seconds, and time offset to a CBOR /// object.</summary> /// <param name='bigYear'>The parameter <paramref name='bigYear'/> is a /// Numbers.EInteger object.</param> /// <param name='lesserFields'>An array that will store the fields /// (other than the year) of the date and time. See the /// TryGetDateTimeFields method for information on the "lesserFields" /// parameter.</param> /// <returns>A CBOR object encoding the given date fields according to /// the conversion type used to create this date converter.</returns> /// <exception cref='ArgumentNullException'>The parameter <paramref /// name='bigYear'/> or <paramref name='lesserFields'/> is /// null.</exception> /// <exception cref='PeterO.Cbor2.CBORException'>An error occurred in /// conversion.</exception> public CBORObject DateTimeFieldsToCBORObject(EInteger bigYear, int[] lesserFields) { // TODO: In next minor version, add overload that takes int rather than // EInteger if (bigYear == null) { throw new ArgumentNullException(nameof(bigYear)); } if (lesserFields == null) { throw new ArgumentNullException(nameof(lesserFields)); } // TODO: Make into CBORException in next major version if (lesserFields.Length < 7) { throw new ArgumentException("\"lesserFields\" + \"'s length\" (" + lesserFields.Length + ") is not greater or equal to 7"); } try { CBORUtilities.CheckYearAndLesserFields(bigYear, lesserFields); switch (this.convType) { case ConversionType.TaggedString: { string str = CBORUtilities.ToAtomDateTimeString(bigYear, lesserFields); return(CBORObject.FromObjectAndTag(str, 0)); } case ConversionType.TaggedNumber: case ConversionType.UntaggedNumber: try { var status = new int[1]; EFloat ef = CBORUtilities.DateTimeToIntegerOrDouble( bigYear, lesserFields, status); if (status[0] == 0) { return(this.convType == ConversionType.TaggedNumber ? CBORObject.FromObjectAndTag(ef.ToEInteger(), 1) : CBORObject.FromObject(ef.ToEInteger())); } else if (status[0] == 1) { return(this.convType == ConversionType.TaggedNumber ? CBORObject.FromFloatingPointBits(ef.ToDoubleBits(), 8).WithTag(1) : CBORObject.FromFloatingPointBits(ef.ToDoubleBits(), 8)); } else { throw new CBORException("Too big or small to fit an integer" + "\u0020or" + "\u0020floating-point number"); } } catch (ArgumentException ex) { throw new CBORException(ex.Message, ex); } default: throw new CBORException("Internal error"); } } catch (ArgumentException ex) { throw new CBORException(ex.Message, ex); } }