diff options
Diffstat (limited to 'vendor/github.com/francoispqt/gojay/decode_number_float.go')
| -rw-r--r-- | vendor/github.com/francoispqt/gojay/decode_number_float.go | 516 |
1 files changed, 516 insertions, 0 deletions
diff --git a/vendor/github.com/francoispqt/gojay/decode_number_float.go b/vendor/github.com/francoispqt/gojay/decode_number_float.go new file mode 100644 index 00000000..f76c5861 --- /dev/null +++ b/vendor/github.com/francoispqt/gojay/decode_number_float.go @@ -0,0 +1,516 @@ +package gojay + +// DecodeFloat64 reads the next JSON-encoded value from the decoder's input (io.Reader) and stores it in the float64 pointed to by v. +// +// See the documentation for Unmarshal for details about the conversion of JSON into a Go value. +func (dec *Decoder) DecodeFloat64(v *float64) error { + if dec.isPooled == 1 { + panic(InvalidUsagePooledDecoderError("Invalid usage of pooled decoder")) + } + return dec.decodeFloat64(v) +} +func (dec *Decoder) decodeFloat64(v *float64) error { + for ; dec.cursor < dec.length || dec.read(); dec.cursor++ { + switch c := dec.data[dec.cursor]; c { + case ' ', '\n', '\t', '\r', ',': + continue + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + val, err := dec.getFloat() + if err != nil { + return err + } + *v = val + return nil + case '-': + dec.cursor = dec.cursor + 1 + val, err := dec.getFloatNegative() + if err != nil { + return err + } + *v = -val + return nil + case 'n': + dec.cursor++ + err := dec.assertNull() + if err != nil { + return err + } + return nil + default: + dec.err = dec.makeInvalidUnmarshalErr(v) + err := dec.skipData() + if err != nil { + return err + } + return nil + } + } + return dec.raiseInvalidJSONErr(dec.cursor) +} +func (dec *Decoder) decodeFloat64Null(v **float64) error { + for ; dec.cursor < dec.length || dec.read(); dec.cursor++ { + switch c := dec.data[dec.cursor]; c { + case ' ', '\n', '\t', '\r', ',': + continue + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + val, err := dec.getFloat() + if err != nil { + return err + } + if *v == nil { + *v = new(float64) + } + **v = val + return nil + case '-': + dec.cursor = dec.cursor + 1 + val, err := dec.getFloatNegative() + if err != nil { + return err + } + if *v == nil { + *v = new(float64) + } + **v = -val + return nil + case 'n': + dec.cursor++ + err := dec.assertNull() + if err != nil { + return err + } + return nil + default: + dec.err = dec.makeInvalidUnmarshalErr(v) + err := dec.skipData() + if err != nil { + return err + } + return nil + } + } + return dec.raiseInvalidJSONErr(dec.cursor) +} + +func (dec *Decoder) getFloatNegative() (float64, error) { + // look for following numbers + for ; dec.cursor < dec.length || dec.read(); dec.cursor++ { + switch dec.data[dec.cursor] { + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + return dec.getFloat() + default: + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + } + return 0, dec.raiseInvalidJSONErr(dec.cursor) +} + +func (dec *Decoder) getFloat() (float64, error) { + var end = dec.cursor + var start = dec.cursor + // look for following numbers + for j := dec.cursor + 1; j < dec.length || dec.read(); j++ { + switch dec.data[j] { + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + end = j + continue + case '.': + // we get part before decimal as integer + beforeDecimal := dec.atoi64(start, end) + // then we get part after decimal as integer + start = j + 1 + // get number after the decimal point + for i := j + 1; i < dec.length || dec.read(); i++ { + c := dec.data[i] + if isDigit(c) { + end = i + // multiply the before decimal point portion by 10 using bitwise + // make sure it doesn't overflow + if end-start < 18 { + beforeDecimal = (beforeDecimal << 3) + (beforeDecimal << 1) + } + continue + } else if (c == 'e' || c == 'E') && j < i-1 { + // we have an exponent, convert first the value we got before the exponent + var afterDecimal int64 + expI := end - start + 2 + // if exp is too long, it means number is too long, just truncate the number + if expI >= len(pow10uint64) || expI < 0 { + expI = len(pow10uint64) - 2 + afterDecimal = dec.atoi64(start, start+expI-2) + } else { + // then we add both integers + // then we divide the number by the power found + afterDecimal = dec.atoi64(start, end) + } + dec.cursor = i + 1 + pow := pow10uint64[expI] + floatVal := float64(beforeDecimal+afterDecimal) / float64(pow) + exp, err := dec.getExponent() + if err != nil { + return 0, err + } + pExp := (exp + (exp >> 31)) ^ (exp >> 31) + 1 // absolute exponent + if pExp >= int64(len(pow10uint64)) || pExp < 0 { + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + // if exponent is negative + if exp < 0 { + return float64(floatVal) * (1 / float64(pow10uint64[pExp])), nil + } + return float64(floatVal) * float64(pow10uint64[pExp]), nil + } + dec.cursor = i + break + } + if end >= dec.length || end < start { + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + var afterDecimal int64 + expI := end - start + 2 + // if exp is too long, it means number is too long, just truncate the number + if expI >= len(pow10uint64) || expI < 0 { + expI = 19 + afterDecimal = dec.atoi64(start, start+expI-2) + } else { + afterDecimal = dec.atoi64(start, end) + } + + pow := pow10uint64[expI] + // then we add both integers + // then we divide the number by the power found + return float64(beforeDecimal+afterDecimal) / float64(pow), nil + case 'e', 'E': + dec.cursor = j + 1 + // we get part before decimal as integer + beforeDecimal := uint64(dec.atoi64(start, end)) + // get exponent + exp, err := dec.getExponent() + if err != nil { + return 0, err + } + pExp := (exp + (exp >> 31)) ^ (exp >> 31) + 1 // abs + if pExp >= int64(len(pow10uint64)) || pExp < 0 { + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + // if exponent is negative + if exp < 0 { + return float64(beforeDecimal) * (1 / float64(pow10uint64[pExp])), nil + } + return float64(beforeDecimal) * float64(pow10uint64[pExp]), nil + case ' ', '\n', '\t', '\r', ',', '}', ']': // does not have decimal + dec.cursor = j + return float64(dec.atoi64(start, end)), nil + } + // invalid json we expect numbers, dot (single one), comma, or spaces + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + return float64(dec.atoi64(start, end)), nil +} + +// DecodeFloat32 reads the next JSON-encoded value from the decoder's input (io.Reader) and stores it in the float32 pointed to by v. +// +// See the documentation for Unmarshal for details about the conversion of JSON into a Go value. +func (dec *Decoder) DecodeFloat32(v *float32) error { + if dec.isPooled == 1 { + panic(InvalidUsagePooledDecoderError("Invalid usage of pooled decoder")) + } + return dec.decodeFloat32(v) +} +func (dec *Decoder) decodeFloat32(v *float32) error { + for ; dec.cursor < dec.length || dec.read(); dec.cursor++ { + switch c := dec.data[dec.cursor]; c { + case ' ', '\n', '\t', '\r', ',': + continue + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + val, err := dec.getFloat32() + if err != nil { + return err + } + *v = val + return nil + case '-': + dec.cursor = dec.cursor + 1 + val, err := dec.getFloat32Negative() + if err != nil { + return err + } + *v = -val + return nil + case 'n': + dec.cursor++ + err := dec.assertNull() + if err != nil { + return err + } + return nil + default: + dec.err = dec.makeInvalidUnmarshalErr(v) + err := dec.skipData() + if err != nil { + return err + } + return nil + } + } + return dec.raiseInvalidJSONErr(dec.cursor) +} +func (dec *Decoder) decodeFloat32Null(v **float32) error { + for ; dec.cursor < dec.length || dec.read(); dec.cursor++ { + switch c := dec.data[dec.cursor]; c { + case ' ', '\n', '\t', '\r', ',': + continue + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + val, err := dec.getFloat32() + if err != nil { + return err + } + if *v == nil { + *v = new(float32) + } + **v = val + return nil + case '-': + dec.cursor = dec.cursor + 1 + val, err := dec.getFloat32Negative() + if err != nil { + return err + } + if *v == nil { + *v = new(float32) + } + **v = -val + return nil + case 'n': + dec.cursor++ + err := dec.assertNull() + if err != nil { + return err + } + return nil + default: + dec.err = dec.makeInvalidUnmarshalErr(v) + err := dec.skipData() + if err != nil { + return err + } + return nil + } + } + return dec.raiseInvalidJSONErr(dec.cursor) +} + +func (dec *Decoder) getFloat32Negative() (float32, error) { + // look for following numbers + for ; dec.cursor < dec.length || dec.read(); dec.cursor++ { + switch dec.data[dec.cursor] { + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + return dec.getFloat32() + default: + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + } + return 0, dec.raiseInvalidJSONErr(dec.cursor) +} + +func (dec *Decoder) getFloat32() (float32, error) { + var end = dec.cursor + var start = dec.cursor + // look for following numbers + for j := dec.cursor + 1; j < dec.length || dec.read(); j++ { + switch dec.data[j] { + case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9': + end = j + continue + case '.': + // we get part before decimal as integer + beforeDecimal := dec.atoi64(start, end) + // then we get part after decimal as integer + start = j + 1 + // get number after the decimal point + // multiple the before decimal point portion by 10 using bitwise + for i := j + 1; i < dec.length || dec.read(); i++ { + c := dec.data[i] + if isDigit(c) { + end = i + // multiply the before decimal point portion by 10 using bitwise + // make sure it desn't overflow + if end-start < 9 { + beforeDecimal = (beforeDecimal << 3) + (beforeDecimal << 1) + } + continue + } else if (c == 'e' || c == 'E') && j < i-1 { + // we get the number before decimal + var afterDecimal int64 + expI := end - start + 2 + // if exp is too long, it means number is too long, just truncate the number + if expI >= 12 || expI < 0 { + expI = 10 + afterDecimal = dec.atoi64(start, start+expI-2) + } else { + afterDecimal = dec.atoi64(start, end) + } + dec.cursor = i + 1 + pow := pow10uint64[expI] + // then we add both integers + // then we divide the number by the power found + floatVal := float32(beforeDecimal+afterDecimal) / float32(pow) + exp, err := dec.getExponent() + if err != nil { + return 0, err + } + pExp := (exp + (exp >> 31)) ^ (exp >> 31) + 1 // abs + if pExp >= int64(len(pow10uint64)) || pExp < 0 { + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + // if exponent is negative + if exp < 0 { + return float32(floatVal) * (1 / float32(pow10uint64[pExp])), nil + } + return float32(floatVal) * float32(pow10uint64[pExp]), nil + } + dec.cursor = i + break + } + if end >= dec.length || end < start { + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + // then we add both integers + // then we divide the number by the power found + var afterDecimal int64 + expI := end - start + 2 + // if exp is too long, it means number is too long, just truncate the number + if expI >= 12 || expI < 0 { + expI = 10 + afterDecimal = dec.atoi64(start, start+expI-2) + } else { + // then we add both integers + // then we divide the number by the power found + afterDecimal = dec.atoi64(start, end) + } + pow := pow10uint64[expI] + return float32(beforeDecimal+afterDecimal) / float32(pow), nil + case 'e', 'E': + dec.cursor = j + 1 + // we get part before decimal as integer + beforeDecimal := dec.atoi64(start, end) + // get exponent + exp, err := dec.getExponent() + if err != nil { + return 0, err + } + pExp := (exp + (exp >> 31)) ^ (exp >> 31) + 1 + if pExp >= int64(len(pow10uint64)) || pExp < 0 { + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + // if exponent is negative + if exp < 0 { + return float32(beforeDecimal) * (1 / float32(pow10uint64[pExp])), nil + } + return float32(beforeDecimal) * float32(pow10uint64[pExp]), nil + case ' ', '\n', '\t', '\r', ',', '}', ']': // does not have decimal + dec.cursor = j + return float32(dec.atoi64(start, end)), nil + } + // invalid json we expect numbers, dot (single one), comma, or spaces + return 0, dec.raiseInvalidJSONErr(dec.cursor) + } + return float32(dec.atoi64(start, end)), nil +} + +// Add Values functions + +// AddFloat decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) AddFloat(v *float64) error { + return dec.Float64(v) +} + +// AddFloatNull decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +// If a `null` is encountered, gojay does not change the value of the pointer. +func (dec *Decoder) AddFloatNull(v **float64) error { + return dec.Float64Null(v) +} + +// AddFloat64 decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) AddFloat64(v *float64) error { + return dec.Float64(v) +} + +// AddFloat64Null decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +// If a `null` is encountered, gojay does not change the value of the pointer. +func (dec *Decoder) AddFloat64Null(v **float64) error { + return dec.Float64Null(v) +} + +// AddFloat32 decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) AddFloat32(v *float32) error { + return dec.Float32(v) +} + +// AddFloat32Null decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +// If a `null` is encountered, gojay does not change the value of the pointer. +func (dec *Decoder) AddFloat32Null(v **float32) error { + return dec.Float32Null(v) +} + +// Float decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) Float(v *float64) error { + return dec.Float64(v) +} + +// FloatNull decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) FloatNull(v **float64) error { + return dec.Float64Null(v) +} + +// Float64 decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) Float64(v *float64) error { + err := dec.decodeFloat64(v) + if err != nil { + return err + } + dec.called |= 1 + return nil +} + +// Float64Null decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) Float64Null(v **float64) error { + err := dec.decodeFloat64Null(v) + if err != nil { + return err + } + dec.called |= 1 + return nil +} + +// Float32 decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) Float32(v *float32) error { + err := dec.decodeFloat32(v) + if err != nil { + return err + } + dec.called |= 1 + return nil +} + +// Float32Null decodes the JSON value within an object or an array to a *float64. +// If next key value overflows float64, an InvalidUnmarshalError error will be returned. +func (dec *Decoder) Float32Null(v **float32) error { + err := dec.decodeFloat32Null(v) + if err != nil { + return err + } + dec.called |= 1 + return nil +} |