private CBORObject NextJSONValue(
int firstChar,
int[] nextChar,
int depth)
{
int c = firstChar;
CBORObject obj = null;
if (c < 0)
{
this.RaiseError("Unexpected end of data");
}
switch (c)
{
case '"': {
// Parse a string
// The tokenizer already checked the string for invalid
// surrogate pairs, so just call the CBORObject
// constructor directly
obj = CBORObject.FromRawUtf8(this.NextJSONString());
nextChar[0] = this.SkipWhitespaceJSON();
return(obj);
}
case '{': {
// Parse an object
obj = this.ParseJSONObject(depth + 1);
nextChar[0] = this.SkipWhitespaceJSON();
return(obj);
}
case '[': {
// Parse an array
obj = this.ParseJSONArray(depth + 1);
nextChar[0] = this.SkipWhitespaceJSON();
return(obj);
}
case 't': {
// Parse true
if (this.endPos - this.index <= 2 ||
this.bytes[this.index] != (byte)0x72 ||
this.bytes[this.index + 1] != (byte)0x75 ||
this.bytes[this.index + 2] != (byte)0x65)
{
this.RaiseError("Value can't be parsed.");
}
this.index += 3;
nextChar[0] = this.SkipWhitespaceJSON();
return(CBORObject.True);
}
case 'f': {
// Parse false
if (this.endPos - this.index <= 3 ||
this.bytes[this.index] != (byte)0x61 ||
this.bytes[this.index + 1] != (byte)0x6c ||
this.bytes[this.index + 2] != (byte)0x73 ||
this.bytes[this.index + 3] != (byte)0x65)
{
this.RaiseError("Value can't be parsed.");
}
this.index += 4;
nextChar[0] = this.SkipWhitespaceJSON();
return(CBORObject.False);
}
case 'n': {
// Parse null
if (this.endPos - this.index <= 2 ||
this.bytes[this.index] != (byte)0x75 ||
this.bytes[this.index + 1] != (byte)0x6c ||
this.bytes[this.index + 2] != (byte)0x6c)
{
this.RaiseError("Value can't be parsed.");
}
this.index += 3;
nextChar[0] = this.SkipWhitespaceJSON();
return(CBORObject.Null);
}
case '-': {
// Parse a negative number
return(this.NextJSONNegativeNumber(nextChar));
}
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': {
// Parse a nonnegative number
return(this.NextJSONNonnegativeNumber(c, nextChar));
}
default:
this.RaiseError("Value can't be parsed.");
break;
}
return(null);
}
private CBORObject ParseJSONObject(int depth)
{
// Assumes that the last character read was '{'
if (depth > 1000)
{
this.RaiseError("Too deeply nested");
}
int c;
CBORObject key = null;
CBORObject obj;
var nextchar = new int[1];
var seenComma = false;
var myHashMap = new SortedDictionary <CBORObject, CBORObject>();
while (true)
{
c = this.SkipWhitespaceJSON();
switch (c)
{
case -1:
this.RaiseError("A JSON object must end with '}'");
break;
case '}':
if (seenComma)
{
// Situation like '{"0"=>1,}'
this.RaiseError("Trailing comma");
return(null);
}
return(CBORObject.FromRaw(myHashMap));
default: {
// Read the next string
if (c < 0)
{
this.RaiseError("Unexpected end of data");
return(null);
}
if (c != '"')
{
this.RaiseError("Expected a string as a key");
return(null);
}
// Parse a string that represents the object's key
// The tokenizer already checked the string for invalid
// surrogate pairs, so just call the CBORObject
// constructor directly
obj = CBORObject.FromRawUtf8(this.NextJSONString());
key = obj;
break;
}
}
if (this.SkipWhitespaceJSON() != ':')
{
this.RaiseError("Expected a ':' after a key");
}
int oldCount = myHashMap.Count;
// NOTE: Will overwrite existing value
myHashMap[key] = this.NextJSONValue(
this.SkipWhitespaceJSON(),
nextchar,
depth);
int newCount = myHashMap.Count;
if (!this.options.AllowDuplicateKeys &&
oldCount == newCount)
{
this.RaiseError("Duplicate key already exists");
return(null);
}
switch (nextchar[0])
{
case ',':
seenComma = true;
break;
case '}':
return(CBORObject.FromRaw(myHashMap));
default: this.RaiseError("Expected a ',' or '}'");
break;
}
}
}
private CBORObject NextJSONValue(
int firstChar,
int[] nextChar,
int depth)
{
string str;
int c = firstChar;
CBORObject obj = null;
if (c < 0)
{
this.RaiseError("Unexpected end of data");
}
switch (c)
{
case '"': {
// Parse a string
// The tokenizer already checked the string for invalid
// surrogate pairs, so just call the CBORObject
// constructor directly
obj = CBORObject.FromRaw(this.NextJSONString());
nextChar[0] = this.SkipWhitespaceJSON();
return(obj);
}
case '{': {
// Parse an object
obj = this.ParseJSONObject(depth + 1);
nextChar[0] = this.SkipWhitespaceJSON();
return(obj);
}
case '[': {
// Parse an array
obj = this.ParseJSONArray(depth + 1);
nextChar[0] = this.SkipWhitespaceJSON();
return(obj);
}
case 't': {
// Parse true
if ((c = this.ReadChar()) != 'r' || (c = this.ReadChar()) != 'u' ||
(c = this.ReadChar()) != 'e')
{
this.RaiseError("Value can't be parsed.");
}
c = this.ReadChar();
if (c == 0x20 || c == 0x0a || c == 0x0d || c == 0x09)
{
nextChar[0] = this.SkipWhitespaceJSON();
}
else if (this.jsonSequenceMode && depth == 0)
{
nextChar[0] = c;
this.RaiseError("JSON whitespace expected after top-level " +
"number in JSON sequence");
}
else
{
nextChar[0] = c;
}
return(CBORObject.True);
}
case 'f': {
// Parse false
if ((c = this.ReadChar()) != 'a' || (c = this.ReadChar()) != 'l' ||
(c = this.ReadChar()) != 's' || (c = this.ReadChar()) != 'e')
{
this.RaiseError("Value can't be parsed.");
}
c = this.ReadChar();
if (c == 0x20 || c == 0x0a || c == 0x0d || c == 0x09)
{
nextChar[0] = this.SkipWhitespaceJSON();
}
else if (this.jsonSequenceMode && depth == 0)
{
nextChar[0] = c;
this.RaiseError("JSON whitespace expected after top-level " +
"number in JSON sequence");
}
else
{
nextChar[0] = c;
}
return(CBORObject.False);
}
case 'n': {
// Parse null
if ((c = this.ReadChar()) != 'u' || (c = this.ReadChar()) != 'l' ||
(c = this.ReadChar()) != 'l')
{
this.RaiseError("Value can't be parsed.");
}
c = this.ReadChar();
if (c == 0x20 || c == 0x0a || c == 0x0d || c == 0x09)
{
nextChar[0] = this.SkipWhitespaceJSON();
}
else if (this.jsonSequenceMode && depth == 0)
{
nextChar[0] = c;
this.RaiseError("JSON whitespace expected after top-level " +
"number in JSON sequence");
}
else
{
nextChar[0] = c;
}
return(CBORObject.Null);
}
case '-': {
// Parse a negative number
return(this.NextJSONNegativeNumber(nextChar, depth));
}
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': {
// Parse a nonnegative number
int cval = c - '0';
int cstart = c;
var needObj = true;
c = this.ReadChar();
if (!(c == '-' || c == '+' || c == '.' || (c >= '0' && c <= '9') ||
c == 'e' || c == 'E'))
{
// Optimize for common case where JSON number
// is a single digit without sign or exponent
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
needObj = false;
}
else if (c >= '0' && c <= '9')
{
int csecond = c;
if (cstart == '0')
{
// Leading zero followed by any digit is not allowed
this.RaiseError("JSON number can't be parsed.");
}
cval = (cval * 10) + (int)(c - '0');
c = this.ReadChar();
if (c >= '0' && c <= '9')
{
var digits = 2;
var ctmp = new int[10];
ctmp[0] = cstart;
ctmp[1] = csecond;
while (digits < 9 && (c >= '0' && c <= '9'))
{
cval = (cval * 10) + (int)(c - '0');
ctmp[digits++] = c;
c = this.ReadChar();
}
if (c == 'e' || c == 'E' || c == '.' || (c >= '0' && c <= '9'))
{
// Not an all-digit number, or too long
this.sb = this.sb ?? new StringBuilder();
this.sb.Remove(0, this.sb.Length);
for (var vi = 0; vi < digits; ++vi)
{
this.sb.Append((char)ctmp[vi]);
}
}
else
{
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
needObj = false;
}
}
else if (!(c == '-' || c == '+' || c == '.' || c == 'e' || c
== 'E'))
{
// Optimize for common case where JSON number
// is two digits without sign, decimal point, or exponent
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
needObj = false;
}
else
{
this.sb = this.sb ?? new StringBuilder();
this.sb.Remove(0, this.sb.Length);
this.sb.Append((char)cstart);
this.sb.Append((char)csecond);
}
}
else
{
this.sb = this.sb ?? new StringBuilder();
this.sb.Remove(0, this.sb.Length);
this.sb.Append((char)cstart);
}
if (needObj)
{
var charbuf = new char[32];
var charbufptr = 0;
while (
c == '-' || c == '+' || c == '.' || (c >= '0' && c <= '9') ||
c == 'e' || c == 'E')
{
charbuf[charbufptr++] = (char)c;
if (charbufptr >= 32)
{
this.sb.Append(charbuf, 0, 32);
charbufptr = 0;
}
c = this.ReadChar();
}
if (charbufptr > 0)
{
this.sb.Append(charbuf, 0, charbufptr);
}
// check if character can validly appear after a JSON number
if (c != ',' && c != ']' && c != '}' && c != -1 &&
c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09)
{
this.RaiseError("Invalid character after JSON number");
}
str = this.sb.ToString();
obj = CBORDataUtilities.ParseJSONNumber(str, this.options);
if (obj == null)
{
string errstr = (str.Length <= 100) ? str : (str.Substring(0,
100) + "...");
this.RaiseError("JSON number can't be parsed. " + errstr);
}
}
if (c == 0x20 || c == 0x0a || c == 0x0d || c == 0x09)
{
nextChar[0] = this.SkipWhitespaceJSON();
}
else if (this.jsonSequenceMode && depth == 0)
{
nextChar[0] = c;
this.RaiseError("JSON whitespace expected after top-level " +
"number in JSON sequence");
}
else
{
nextChar[0] = c;
}
return(obj);
}
default: this.RaiseError("Value can't be parsed.");
break;
}
return(null);
}
private CBORObject NextJSONNonnegativeNumber(int c, int[] nextChar)
{
// Assumes the last character read was a digit
CBORObject obj = null;
int cval = c - '0';
int cstart = c;
int startIndex = this.index - 1;
var needObj = true;
int numberStartIndex = this.index - 1;
c = this.index < this.endPos ? ((int)this.bytes[this.index++]) &
0xff : -1;
if (!(c == '-' || c == '+' || c == '.' || (c >= '0' && c <= '9') ||
c == 'e' || c == 'E'))
{
// Optimize for common case where JSON number
// is a single digit without sign or exponent
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
needObj = false;
}
else if (c >= '0' && c <= '9')
{
int csecond = c;
if (cstart == '0')
{
// Leading zero followed by any digit is not allowed
this.RaiseError("JSON number can't be parsed.");
}
cval = (cval * 10) + (int)(c - '0');
c = this.index < this.endPos ? ((int)this.bytes[this.index++]) &
0xff : -1;
if (c >= '0' && c <= '9')
{
var digits = 2;
while (digits < 9 && (c >= '0' && c <= '9'))
{
cval = (cval * 10) + (int)(c - '0');
c = this.index < this.endPos ?
((int)this.bytes[this.index++]) & 0xff : -1;
++digits;
}
if (!(c == 'e' || c == 'E' || c == '.' || (c >= '0' && c <=
'9')))
{
// All-digit number that's short enough
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
#if DEBUG
if ((
(EDecimal)obj.ToObject(
typeof(EDecimal))).CompareToValue(EDecimal.FromInt32(cval)) !=
0)
{
this.RaiseError(String.Empty + obj);
}
#endif
needObj = false;
}
}
else if (!(c == '-' || c == '+' || c == '.' || c == 'e' || c
== 'E'))
{
// Optimize for common case where JSON number
// is two digits without sign, decimal point, or exponent
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
#if DEBUG
if ((
(EDecimal)obj.ToObject(
typeof(EDecimal))).CompareToValue(EDecimal.FromInt32(cval)) !=
0)
{
this.RaiseError(String.Empty + obj);
}
#endif
needObj = false;
}
}
if (needObj)
{
while (c == '-' || c == '+' || c == '.' || (c >= '0' && c <= '9') ||
c == 'e' || c == 'E')
{
c = this.index < this.endPos ? ((int)this.bytes[this.index++]) &
0xff : -1;
}
// check if character can validly appear after a JSON number
if (c != ',' && c != ']' && c != '}' && c != -1 &&
c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09)
{
this.RaiseError("Invalid character after JSON number");
}
int numberEndIndex = c < 0 ? this.endPos : this.index - 1;
obj = CBORDataUtilities.ParseJSONNumber(
this.bytes,
numberStartIndex,
numberEndIndex - numberStartIndex,
this.options);
#if DEBUG
if (this.options.NumberConversion == JSONOptions.ConversionMode.Full &&
(
(EDecimal)obj.ToObject(
typeof(EDecimal))).CompareToValue(EDecimal.FromString(this.bytes,
numberStartIndex,
numberEndIndex - numberStartIndex)) != 0)
{
this.RaiseError(String.Empty + obj);
}
#endif
if (obj == null)
{
string errstr = String.Empty;
// errstr = (str.Length <= 100) ? str : (str.Substring(0,
// 100) + "...");
this.RaiseError("JSON number can't be parsed. " + errstr);
}
}
if (c == -1 || (c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09))
{
nextChar[0] = c;
}
else
{
nextChar[0] = this.SkipWhitespaceJSON();
}
return(obj);
}
public static CBORObject FromObject(ulong value)
{
return(CBORObject.FromObject(UInt64ToEInteger(value)));
}
internal static CBORObject ParseJSONNumber(
byte[] 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)
{
byte 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);
}
byte 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");
}
private CBORObject ReadStringArrayMap(int type, long uadditional)
{
bool canonical = this.options.Ctap2Canonical;
if (type == 2 || type == 3) // Byte string or text string
{
if ((uadditional >> 31) != 0)
{
throw new CBORException("Length of " +
ToUnsignedEInteger(uadditional).ToString() + " is bigger" +
"\u0020than supported");
}
int hint = (uadditional > Int32.MaxValue ||
(uadditional >> 63) != 0) ? Int32.MaxValue : (int)uadditional;
byte[] data = ReadByteData(this.stream, uadditional, null);
if (type == 3)
{
if (!CBORUtilities.CheckUtf8(data))
{
throw new CBORException("Invalid UTF-8");
}
return(this.ObjectFromUtf8Array(data, hint));
}
else
{
return(this.ObjectFromByteArray(data, hint));
}
}
if (type == 4) // Array
{
if (this.options.Ctap2Canonical && this.depth >= 4)
{
throw new CBORException("Depth too high in canonical CBOR");
}
CBORObject cbor = CBORObject.NewArray();
if ((uadditional >> 31) != 0)
{
throw new CBORException("Length of " +
ToUnsignedEInteger(uadditional).ToString() + " is bigger than" +
"\u0020supported");
}
if (PropertyMap.ExceedsKnownLength(this.stream, uadditional))
{
throw new CBORException("Remaining data too small for array" +
"\u0020length");
}
++this.depth;
for (long i = 0; i < uadditional; ++i)
{
cbor.Add(
this.ReadInternal());
}
--this.depth;
return(cbor);
}
if (type == 5) // Map, type 5
{
if (this.options.Ctap2Canonical && this.depth >= 4)
{
throw new CBORException("Depth too high in canonical CBOR");
}
CBORObject cbor = CBORObject.NewMap();
if ((uadditional >> 31) != 0)
{
throw new CBORException("Length of " +
ToUnsignedEInteger(uadditional).ToString() + " is bigger than" +
"\u0020supported");
}
if (PropertyMap.ExceedsKnownLength(this.stream, uadditional))
{
throw new CBORException("Remaining data too small for map" +
"\u0020length");
}
CBORObject lastKey = null;
IComparer <CBORObject> comparer = CBORCanonical.Comparer;
for (long i = 0; i < uadditional; ++i)
{
++this.depth;
CBORObject key = this.ReadInternal();
CBORObject value = this.ReadInternal();
--this.depth;
if (this.options.Ctap2Canonical && lastKey != null)
{
int cmp = comparer.Compare(lastKey, key);
if (cmp > 0)
{
throw new CBORException("Map key not in canonical order");
}
else if (cmp == 0)
{
throw new CBORException("Duplicate map key");
}
}
if (!this.options.AllowDuplicateKeys)
{
if (cbor.ContainsKey(key))
{
throw new CBORException("Duplicate key already exists");
}
}
lastKey = key;
cbor[key] = value;
}
return(cbor);
}
return(null);
}
/// <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);
}
}
private string TryGetDateTimeFieldsInternal(
CBORObject obj,
EInteger[] year,
int[] lesserFields)
{
if (obj == null)
{
return("Object is null");
}
if (year == null)
{
throw new ArgumentNullException(nameof(year));
}
EInteger[] outYear = year;
if (outYear.Length < 1)
{
throw new ArgumentException("\"year\" + \"'s length\" (" +
outYear.Length + ") is not greater or equal to 1");
}
if (lesserFields == null)
{
throw new ArgumentNullException(nameof(lesserFields));
}
if (lesserFields.Length < 7)
{
throw new ArgumentException("\"lesserFields\" + \"'s length\" (" +
lesserFields.Length + ") is not greater or equal to 7");
}
if (this.convType == ConversionType.UntaggedNumber)
{
if (obj.IsTagged)
{
return("May not be tagged");
}
CBORObject untagobj = obj;
if (!untagobj.IsNumber)
{
return("Not a finite number");
}
CBORNumber num = untagobj.AsNumber();
if (!num.IsFinite())
{
return("Not a finite number");
}
if (num.CompareTo(Int64.MinValue) < 0 ||
num.CompareTo(Int64.MaxValue) > 0)
{
return("Too big or small to fit a DateTime");
}
if (num.CanFitInInt64())
{
CBORUtilities.BreakDownSecondsSinceEpoch(
num.ToInt64Checked(),
outYear,
lesserFields);
}
else
{
EDecimal dec;
dec = (EDecimal)untagobj.ToObject(typeof(EDecimal));
CBORUtilities.BreakDownSecondsSinceEpoch(
dec,
outYear,
lesserFields);
}
return(null); // no error
}
if (obj.HasMostOuterTag(0))
{
string str = obj.AsString();
try {
CBORUtilities.ParseAtomDateTimeString(str, outYear, lesserFields);
return(null); // no error
} catch (OverflowException ex) {
return(ex.Message);
} catch (InvalidOperationException ex) {
return(ex.Message);
} catch (ArgumentException ex) {
return(ex.Message);
}
}
else if (obj.HasMostOuterTag(1))
{
CBORObject untagobj = obj.UntagOne();
if (!untagobj.IsNumber)
{
return("Not a finite number");
}
CBORNumber num = untagobj.AsNumber();
if (!num.IsFinite())
{
return("Not a finite number");
}
if (num.CanFitInInt64())
{
CBORUtilities.BreakDownSecondsSinceEpoch(
num.ToInt64Checked(),
outYear,
lesserFields);
}
else
{
EDecimal dec;
dec = (EDecimal)untagobj.ToObject(typeof(EDecimal));
CBORUtilities.BreakDownSecondsSinceEpoch(
dec,
outYear,
lesserFields);
}
return(null); // No error
}
return("Not tag 0 or 1");
}
private CBORObject NextJSONNonnegativeNumber(int c, int[] nextChar)
{
// Assumes the last character read was a digit
CBORObject obj = null;
int cval = c - '0';
int cstart = c;
int startIndex = this.index - 1;
var needObj = true;
int numberStartIndex = this.index - 1;
// DebugUtility.Log("js=" + (jstring));
c = this.index < this.endPos ? ((int)this.jstring[this.index++]) &
0xffff : -1;
if (!(c == '-' || c == '+' || c == '.' || (c >= '0' && c <= '9') ||
c == 'e' || c == 'E'))
{
// Optimize for common case where JSON number
// is a single digit without sign or exponent
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
needObj = false;
}
else if (c >= '0' && c <= '9')
{
int csecond = c;
if (cstart == '0')
{
// Leading zero followed by any digit is not allowed
this.RaiseError("JSON number can't be parsed.");
}
cval = (cval * 10) + (int)(c - '0');
c = this.index < this.endPos ? ((int)this.jstring[this.index++]) : -1;
if (c >= '0' && c <= '9')
{
var digits = 2;
while (digits < 9 && (c >= '0' && c <= '9'))
{
cval = (cval * 10) + (int)(c - '0');
c = this.index < this.endPos ?
((int)this.jstring[this.index++]) : -1;
++digits;
}
if (!(c == 'e' || c == 'E' || c == '.' || (c >= '0' && c <=
'9')))
{
// All-digit number that's short enough
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
needObj = false;
}
}
else if (!(c == '-' || c == '+' || c == '.' || c == 'e' || c
== 'E'))
{
// Optimize for common case where JSON number
// is two digits without sign, decimal point, or exponent
obj = CBORDataUtilities.ParseSmallNumber(cval, this.options);
needObj = false;
}
}
if (needObj)
{
// NOTE: Differs from CBORJson2, notably because the whole
// rest of the string is checked whether the beginning of the rest
// is a JSON number
var endIndex = new int[1];
endIndex[0] = numberStartIndex;
obj = CBORDataUtilitiesTextString.ParseJSONNumber(
this.jstring,
numberStartIndex,
this.endPos - numberStartIndex,
this.options,
endIndex);
int numberEndIndex = endIndex[0];
this.index = numberEndIndex >= this.endPos ? this.endPos :
(numberEndIndex + 1);
if (obj == null)
{
int strlen = numberEndIndex - numberStartIndex;
string errstr = this.jstring.Substring(numberStartIndex,
Math.Min(100, strlen));
if (strlen > 100)
{
errstr += "...";
}
this.RaiseError("JSON number can't be parsed. " + errstr);
}
#if DEBUG
if (numberEndIndex < numberStartIndex)
{
throw new ArgumentException("numberEndIndex (" + numberEndIndex +
") is not greater or equal to " + numberStartIndex);
}
#endif
c = numberEndIndex >= this.endPos ? -1 : this.jstring[numberEndIndex];
// check if character can validly appear after a JSON number
if (c != ',' && c != ']' && c != '}' && c != -1 &&
c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09)
{
this.RaiseError("Invalid character after JSON number");
}
// DebugUtility.Log("endIndex="+endIndex[0]+", "+
// this.jstring.Substring(endIndex[0],
// Math.Min(20, this.endPos-endIndex[0])));
}
if (c == -1 || (c != 0x20 && c != 0x0a && c != 0x0d && c != 0x09))
{
nextChar[0] = c;
}
else
{
nextChar[0] = this.SkipWhitespaceJSON();
}
return(obj);
}
