| // Copyright (C) MongoDB, Inc. 2017-present. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); you may |
| // not use this file except in compliance with the License. You may obtain |
| // a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 |
| |
| package bsoncore |
| |
| import ( |
| "bytes" |
| "encoding/base64" |
| "fmt" |
| "math" |
| "sort" |
| "strconv" |
| "strings" |
| "time" |
| "unicode/utf8" |
| |
| "github.com/mongodb/mongo-go-driver/bson/bsontype" |
| "github.com/mongodb/mongo-go-driver/bson/primitive" |
| ) |
| |
| // ElementTypeError specifies that a method to obtain a BSON value an incorrect type was called on a bson.Value. |
| type ElementTypeError struct { |
| Method string |
| Type bsontype.Type |
| } |
| |
| // Error implements the error interface. |
| func (ete ElementTypeError) Error() string { |
| return "Call of " + ete.Method + " on " + ete.Type.String() + " type" |
| } |
| |
| // Value represents a BSON value with a type and raw bytes. |
| type Value struct { |
| Type bsontype.Type |
| Data []byte |
| } |
| |
| // Validate ensures the value is a valid BSON value. |
| func (v Value) Validate() error { |
| _, _, valid := readValue(v.Data, v.Type) |
| if !valid { |
| return NewInsufficientBytesError(v.Data, v.Data) |
| } |
| return nil |
| } |
| |
| // IsNumber returns true if the type of v is a numeric BSON type. |
| func (v Value) IsNumber() bool { |
| switch v.Type { |
| case bsontype.Double, bsontype.Int32, bsontype.Int64, bsontype.Decimal128: |
| return true |
| default: |
| return false |
| } |
| } |
| |
| // AsInt32 returns a BSON number as an int32. If the BSON type is not a numeric one, this method |
| // will panic. |
| // |
| // TODO(skriptble): Add support for Decimal128. |
| func (v Value) AsInt32() int32 { return 0 } |
| |
| // AsInt32OK functions the same as AsInt32 but returns a boolean instead of panicking. False |
| // indicates an error. |
| // |
| // TODO(skriptble): Add support for Decimal128. |
| func (v Value) AsInt32OK() (int32, bool) { return 0, false } |
| |
| // AsInt64 returns a BSON number as an int64. If the BSON type is not a numeric one, this method |
| // will panic. |
| // |
| // TODO(skriptble): Add support for Decimal128. |
| func (v Value) AsInt64() int64 { return 0 } |
| |
| // AsInt64OK functions the same as AsInt64 but returns a boolean instead of panicking. False |
| // indicates an error. |
| // |
| // TODO(skriptble): Add support for Decimal128. |
| func (v Value) AsInt64OK() (int64, bool) { return 0, false } |
| |
| // AsFloat64 returns a BSON number as an float64. If the BSON type is not a numeric one, this method |
| // will panic. |
| // |
| // TODO(skriptble): Add support for Decimal128. |
| func (v Value) AsFloat64() float64 { return 0 } |
| |
| // AsFloat64OK functions the same as AsFloat64 but returns a boolean instead of panicking. False |
| // indicates an error. |
| // |
| // TODO(skriptble): Add support for Decimal128. |
| func (v Value) AsFloat64OK() (float64, bool) { return 0, false } |
| |
| // Add will add this value to another. This is currently only implemented for strings and numbers. |
| // If either value is a string, the other type is coerced into a string and added to the other. |
| // |
| // This method will alter v and will attempt to reuse the []byte of v. If the []byte is too small, |
| // it will be expanded. |
| func (v *Value) Add(v2 Value) error { return nil } |
| |
| // Equal compaes v to v2 and returns true if they are equal. |
| func (v Value) Equal(v2 Value) bool { |
| if v.Type != v2.Type { |
| return false |
| } |
| |
| return bytes.Equal(v.Data, v2.Data) |
| } |
| |
| // String implements the fmt.String interface. This method will return values in extended JSON |
| // format. If the value is not valid, this returns an empty string |
| func (v Value) String() string { |
| switch v.Type { |
| case bsontype.Double: |
| f64, ok := v.DoubleOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$numberDouble":"%s"}`, formatDouble(f64)) |
| case bsontype.String: |
| str, ok := v.StringValueOK() |
| if !ok { |
| return "" |
| } |
| return escapeString(str) |
| case bsontype.EmbeddedDocument: |
| doc, ok := v.DocumentOK() |
| if !ok { |
| return "" |
| } |
| return doc.String() |
| case bsontype.Array: |
| arr, ok := v.ArrayOK() |
| if !ok { |
| return "" |
| } |
| return docAsArray(arr, false) |
| case bsontype.Binary: |
| subtype, data, ok := v.BinaryOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$binary":{"base64":"%s","subType":"%02x"}}`, base64.StdEncoding.EncodeToString(data), subtype) |
| case bsontype.Undefined: |
| return `{"$undefined":true}` |
| case bsontype.ObjectID: |
| oid, ok := v.ObjectIDOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$oid":%s}`, oid.Hex()) |
| case bsontype.Boolean: |
| b, ok := v.BooleanOK() |
| if !ok { |
| return "" |
| } |
| return strconv.FormatBool(b) |
| case bsontype.DateTime: |
| dt, ok := v.DateTimeOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$date":{"$numberLong":"%d"}}`, dt) |
| case bsontype.Null: |
| return "null" |
| case bsontype.Regex: |
| pattern, options, ok := v.RegexOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf( |
| `{"$regularExpression":{"pattern":%s,"options":"%s"}}`, |
| escapeString(pattern), sortStringAlphebeticAscending(options), |
| ) |
| case bsontype.DBPointer: |
| ns, pointer, ok := v.DBPointerOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$dbPointer":{"$ref":%s,"$id":{"$oid":"%s"}}}`, escapeString(ns), pointer.Hex()) |
| case bsontype.JavaScript: |
| js, ok := v.JavaScriptOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$code":%s}`, escapeString(js)) |
| case bsontype.Symbol: |
| symbol, ok := v.SymbolOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$symbol":%s}`, escapeString(symbol)) |
| case bsontype.CodeWithScope: |
| code, scope, ok := v.CodeWithScopeOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$code":%s,"$scope":%s}`, code, scope) |
| case bsontype.Int32: |
| i32, ok := v.Int32OK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$numberInt":"%d"}`, i32) |
| case bsontype.Timestamp: |
| t, i, ok := v.TimestampOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$timestamp":{"t":"%s","i":"%s"}}`, strconv.FormatUint(uint64(t), 10), strconv.FormatUint(uint64(i), 10)) |
| case bsontype.Int64: |
| i64, ok := v.Int64OK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$numberLong":"%d"}`, i64) |
| case bsontype.Decimal128: |
| d128, ok := v.Decimal128OK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$numberDecimal":"%s"}`, d128.String()) |
| case bsontype.MinKey: |
| return `{"$minKey":1}` |
| case bsontype.MaxKey: |
| return `{"$maxKey":1}` |
| default: |
| return "" |
| } |
| } |
| |
| // DebugString outputs a human readable version of Document. It will attempt to stringify the |
| // valid components of the document even if the entire document is not valid. |
| func (v Value) DebugString() string { |
| switch v.Type { |
| case bsontype.String: |
| str, ok := v.StringValueOK() |
| if !ok { |
| return "<malformed>" |
| } |
| return escapeString(str) |
| case bsontype.EmbeddedDocument: |
| doc, ok := v.DocumentOK() |
| if !ok { |
| return "<malformed>" |
| } |
| return doc.DebugString() |
| case bsontype.Array: |
| arr, ok := v.ArrayOK() |
| if !ok { |
| return "<malformed>" |
| } |
| return docAsArray(arr, true) |
| case bsontype.CodeWithScope: |
| code, scope, ok := v.CodeWithScopeOK() |
| if !ok { |
| return "" |
| } |
| return fmt.Sprintf(`{"$code":%s,"$scope":%s}`, code, scope.DebugString()) |
| default: |
| str := v.String() |
| if str == "" { |
| return "<malformed>" |
| } |
| return str |
| } |
| } |
| |
| // Double returns the float64 value for this element. |
| // It panics if e's BSON type is not bsontype.Double. |
| func (v Value) Double() float64 { |
| if v.Type != bsontype.Double { |
| panic(ElementTypeError{"bsoncore.Value.Double", v.Type}) |
| } |
| f64, _, ok := ReadDouble(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return f64 |
| } |
| |
| // DoubleOK is the same as Double, but returns a boolean instead of panicking. |
| func (v Value) DoubleOK() (float64, bool) { |
| if v.Type != bsontype.Double { |
| return 0, false |
| } |
| f64, _, ok := ReadDouble(v.Data) |
| if !ok { |
| return 0, false |
| } |
| return f64, true |
| } |
| |
| // StringValue returns the string balue for this element. |
| // It panics if e's BSON type is not bsontype.String. |
| // |
| // NOTE: This method is called StringValue to avoid a collision with the String method which |
| // implements the fmt.Stringer interface. |
| func (v Value) StringValue() string { |
| if v.Type != bsontype.String { |
| panic(ElementTypeError{"bsoncore.Value.StringValue", v.Type}) |
| } |
| str, _, ok := ReadString(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return str |
| } |
| |
| // StringValueOK is the same as StringValue, but returns a boolean instead of |
| // panicking. |
| func (v Value) StringValueOK() (string, bool) { |
| if v.Type != bsontype.String { |
| return "", false |
| } |
| str, _, ok := ReadString(v.Data) |
| if !ok { |
| return "", false |
| } |
| return str, true |
| } |
| |
| // Document returns the BSON document the Value represents as a Document. It panics if the |
| // value is a BSON type other than document. |
| func (v Value) Document() Document { |
| if v.Type != bsontype.EmbeddedDocument { |
| panic(ElementTypeError{"bsoncore.Value.Document", v.Type}) |
| } |
| doc, _, ok := ReadDocument(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return doc |
| } |
| |
| // DocumentOK is the same as Document, except it returns a boolean |
| // instead of panicking. |
| func (v Value) DocumentOK() (Document, bool) { |
| if v.Type != bsontype.EmbeddedDocument { |
| return nil, false |
| } |
| doc, _, ok := ReadDocument(v.Data) |
| if !ok { |
| return nil, false |
| } |
| return doc, true |
| } |
| |
| // Array returns the BSON array the Value represents as an Array. It panics if the |
| // value is a BSON type other than array. |
| func (v Value) Array() Document { |
| if v.Type != bsontype.Array { |
| panic(ElementTypeError{"bsoncore.Value.Array", v.Type}) |
| } |
| arr, _, ok := ReadArray(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return arr |
| } |
| |
| // ArrayOK is the same as Array, except it returns a boolean instead |
| // of panicking. |
| func (v Value) ArrayOK() (Document, bool) { |
| if v.Type != bsontype.Array { |
| return nil, false |
| } |
| arr, _, ok := ReadArray(v.Data) |
| if !ok { |
| return nil, false |
| } |
| return arr, true |
| } |
| |
| // Binary returns the BSON binary value the Value represents. It panics if the value is a BSON type |
| // other than binary. |
| func (v Value) Binary() (subtype byte, data []byte) { |
| if v.Type != bsontype.Binary { |
| panic(ElementTypeError{"bsoncore.Value.Binary", v.Type}) |
| } |
| subtype, data, _, ok := ReadBinary(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return subtype, data |
| } |
| |
| // BinaryOK is the same as Binary, except it returns a boolean instead of |
| // panicking. |
| func (v Value) BinaryOK() (subtype byte, data []byte, ok bool) { |
| if v.Type != bsontype.Binary { |
| return 0x00, nil, false |
| } |
| subtype, data, _, ok = ReadBinary(v.Data) |
| if !ok { |
| return 0x00, nil, false |
| } |
| return subtype, data, true |
| } |
| |
| // ObjectID returns the BSON objectid value the Value represents. It panics if the value is a BSON |
| // type other than objectid. |
| func (v Value) ObjectID() primitive.ObjectID { |
| if v.Type != bsontype.ObjectID { |
| panic(ElementTypeError{"bsoncore.Value.ObjectID", v.Type}) |
| } |
| oid, _, ok := ReadObjectID(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return oid |
| } |
| |
| // ObjectIDOK is the same as ObjectID, except it returns a boolean instead of |
| // panicking. |
| func (v Value) ObjectIDOK() (primitive.ObjectID, bool) { |
| if v.Type != bsontype.ObjectID { |
| return primitive.ObjectID{}, false |
| } |
| oid, _, ok := ReadObjectID(v.Data) |
| if !ok { |
| return primitive.ObjectID{}, false |
| } |
| return oid, true |
| } |
| |
| // Boolean returns the boolean value the Value represents. It panics if the |
| // value is a BSON type other than boolean. |
| func (v Value) Boolean() bool { |
| if v.Type != bsontype.Boolean { |
| panic(ElementTypeError{"bsoncore.Value.Boolean", v.Type}) |
| } |
| b, _, ok := ReadBoolean(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return b |
| } |
| |
| // BooleanOK is the same as Boolean, except it returns a boolean instead of |
| // panicking. |
| func (v Value) BooleanOK() (bool, bool) { |
| if v.Type != bsontype.Boolean { |
| return false, false |
| } |
| b, _, ok := ReadBoolean(v.Data) |
| if !ok { |
| return false, false |
| } |
| return b, true |
| } |
| |
| // DateTime returns the BSON datetime value the Value represents as a |
| // unix timestamp. It panics if the value is a BSON type other than datetime. |
| func (v Value) DateTime() int64 { |
| if v.Type != bsontype.DateTime { |
| panic(ElementTypeError{"bsoncore.Value.DateTime", v.Type}) |
| } |
| dt, _, ok := ReadDateTime(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return dt |
| } |
| |
| // DateTimeOK is the same as DateTime, except it returns a boolean instead of |
| // panicking. |
| func (v Value) DateTimeOK() (int64, bool) { |
| if v.Type != bsontype.DateTime { |
| return 0, false |
| } |
| dt, _, ok := ReadDateTime(v.Data) |
| if !ok { |
| return 0, false |
| } |
| return dt, true |
| } |
| |
| // Time returns the BSON datetime value the Value represents. It panics if the value is a BSON |
| // type other than datetime. |
| func (v Value) Time() time.Time { |
| if v.Type != bsontype.DateTime { |
| panic(ElementTypeError{"bsoncore.Value.Time", v.Type}) |
| } |
| dt, _, ok := ReadDateTime(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return time.Unix(int64(dt)/1000, int64(dt)%1000*1000000) |
| } |
| |
| // TimeOK is the same as Time, except it returns a boolean instead of |
| // panicking. |
| func (v Value) TimeOK() (time.Time, bool) { |
| if v.Type != bsontype.DateTime { |
| return time.Time{}, false |
| } |
| dt, _, ok := ReadDateTime(v.Data) |
| if !ok { |
| return time.Time{}, false |
| } |
| return time.Unix(int64(dt)/1000, int64(dt)%1000*1000000), true |
| } |
| |
| // Regex returns the BSON regex value the Value represents. It panics if the value is a BSON |
| // type other than regex. |
| func (v Value) Regex() (pattern, options string) { |
| if v.Type != bsontype.Regex { |
| panic(ElementTypeError{"bsoncore.Value.Regex", v.Type}) |
| } |
| pattern, options, _, ok := ReadRegex(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return pattern, options |
| } |
| |
| // RegexOK is the same as Regex, except it returns a boolean instead of |
| // panicking. |
| func (v Value) RegexOK() (pattern, options string, ok bool) { |
| if v.Type != bsontype.Regex { |
| return "", "", false |
| } |
| pattern, options, _, ok = ReadRegex(v.Data) |
| if !ok { |
| return "", "", false |
| } |
| return pattern, options, true |
| } |
| |
| // DBPointer returns the BSON dbpointer value the Value represents. It panics if the value is a BSON |
| // type other than DBPointer. |
| func (v Value) DBPointer() (string, primitive.ObjectID) { |
| if v.Type != bsontype.DBPointer { |
| panic(ElementTypeError{"bsoncore.Value.DBPointer", v.Type}) |
| } |
| ns, pointer, _, ok := ReadDBPointer(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return ns, pointer |
| } |
| |
| // DBPointerOK is the same as DBPoitner, except that it returns a boolean |
| // instead of panicking. |
| func (v Value) DBPointerOK() (string, primitive.ObjectID, bool) { |
| if v.Type != bsontype.DBPointer { |
| return "", primitive.ObjectID{}, false |
| } |
| ns, pointer, _, ok := ReadDBPointer(v.Data) |
| if !ok { |
| return "", primitive.ObjectID{}, false |
| } |
| return ns, pointer, true |
| } |
| |
| // JavaScript returns the BSON JavaScript code value the Value represents. It panics if the value is |
| // a BSON type other than JavaScript code. |
| func (v Value) JavaScript() string { |
| if v.Type != bsontype.JavaScript { |
| panic(ElementTypeError{"bsoncore.Value.JavaScript", v.Type}) |
| } |
| js, _, ok := ReadJavaScript(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return js |
| } |
| |
| // JavaScriptOK is the same as Javascript, excepti that it returns a boolean |
| // instead of panicking. |
| func (v Value) JavaScriptOK() (string, bool) { |
| if v.Type != bsontype.JavaScript { |
| return "", false |
| } |
| js, _, ok := ReadJavaScript(v.Data) |
| if !ok { |
| return "", false |
| } |
| return js, true |
| } |
| |
| // Symbol returns the BSON symbol value the Value represents. It panics if the value is a BSON |
| // type other than symbol. |
| func (v Value) Symbol() string { |
| if v.Type != bsontype.Symbol { |
| panic(ElementTypeError{"bsoncore.Value.Symbol", v.Type}) |
| } |
| symbol, _, ok := ReadSymbol(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return symbol |
| } |
| |
| // SymbolOK is the same as Symbol, excepti that it returns a boolean |
| // instead of panicking. |
| func (v Value) SymbolOK() (string, bool) { |
| if v.Type != bsontype.Symbol { |
| return "", false |
| } |
| symbol, _, ok := ReadSymbol(v.Data) |
| if !ok { |
| return "", false |
| } |
| return symbol, true |
| } |
| |
| // CodeWithScope returns the BSON JavaScript code with scope the Value represents. |
| // It panics if the value is a BSON type other than JavaScript code with scope. |
| func (v Value) CodeWithScope() (string, Document) { |
| if v.Type != bsontype.CodeWithScope { |
| panic(ElementTypeError{"bsoncore.Value.CodeWithScope", v.Type}) |
| } |
| code, scope, _, ok := ReadCodeWithScope(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return code, scope |
| } |
| |
| // CodeWithScopeOK is the same as CodeWithScope, except that it returns a boolean instead of |
| // panicking. |
| func (v Value) CodeWithScopeOK() (string, Document, bool) { |
| if v.Type != bsontype.CodeWithScope { |
| return "", nil, false |
| } |
| code, scope, _, ok := ReadCodeWithScope(v.Data) |
| if !ok { |
| return "", nil, false |
| } |
| return code, scope, true |
| } |
| |
| // Int32 returns the int32 the Value represents. It panics if the value is a BSON type other than |
| // int32. |
| func (v Value) Int32() int32 { |
| if v.Type != bsontype.Int32 { |
| panic(ElementTypeError{"bsoncore.Value.Int32", v.Type}) |
| } |
| i32, _, ok := ReadInt32(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return i32 |
| } |
| |
| // Int32OK is the same as Int32, except that it returns a boolean instead of |
| // panicking. |
| func (v Value) Int32OK() (int32, bool) { |
| if v.Type != bsontype.Int32 { |
| return 0, false |
| } |
| i32, _, ok := ReadInt32(v.Data) |
| if !ok { |
| return 0, false |
| } |
| return i32, true |
| } |
| |
| // Timestamp returns the BSON timestamp value the Value represents. It panics if the value is a |
| // BSON type other than timestamp. |
| func (v Value) Timestamp() (t, i uint32) { |
| if v.Type != bsontype.Timestamp { |
| panic(ElementTypeError{"bsoncore.Value.Timestamp", v.Type}) |
| } |
| t, i, _, ok := ReadTimestamp(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return t, i |
| } |
| |
| // TimestampOK is the same as Timestamp, except that it returns a boolean |
| // instead of panicking. |
| func (v Value) TimestampOK() (t, i uint32, ok bool) { |
| if v.Type != bsontype.Timestamp { |
| return 0, 0, false |
| } |
| t, i, _, ok = ReadTimestamp(v.Data) |
| if !ok { |
| return 0, 0, false |
| } |
| return t, i, true |
| } |
| |
| // Int64 returns the int64 the Value represents. It panics if the value is a BSON type other than |
| // int64. |
| func (v Value) Int64() int64 { |
| if v.Type != bsontype.Int64 { |
| panic(ElementTypeError{"bsoncore.Value.Int64", v.Type}) |
| } |
| i64, _, ok := ReadInt64(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return i64 |
| } |
| |
| // Int64OK is the same as Int64, except that it returns a boolean instead of |
| // panicking. |
| func (v Value) Int64OK() (int64, bool) { |
| if v.Type != bsontype.Int64 { |
| return 0, false |
| } |
| i64, _, ok := ReadInt64(v.Data) |
| if !ok { |
| return 0, false |
| } |
| return i64, true |
| } |
| |
| // Decimal128 returns the decimal the Value represents. It panics if the value is a BSON type other than |
| // decimal. |
| func (v Value) Decimal128() primitive.Decimal128 { |
| if v.Type != bsontype.Decimal128 { |
| panic(ElementTypeError{"bsoncore.Value.Decimal128", v.Type}) |
| } |
| d128, _, ok := ReadDecimal128(v.Data) |
| if !ok { |
| panic(NewInsufficientBytesError(v.Data, v.Data)) |
| } |
| return d128 |
| } |
| |
| // Decimal128OK is the same as Decimal128, except that it returns a boolean |
| // instead of panicking. |
| func (v Value) Decimal128OK() (primitive.Decimal128, bool) { |
| if v.Type != bsontype.Decimal128 { |
| return primitive.Decimal128{}, false |
| } |
| d128, _, ok := ReadDecimal128(v.Data) |
| if !ok { |
| return primitive.Decimal128{}, false |
| } |
| return d128, true |
| } |
| |
| var hexChars = "0123456789abcdef" |
| |
| func escapeString(s string) string { |
| escapeHTML := true |
| var buf bytes.Buffer |
| buf.WriteByte('"') |
| start := 0 |
| for i := 0; i < len(s); { |
| if b := s[i]; b < utf8.RuneSelf { |
| if htmlSafeSet[b] || (!escapeHTML && safeSet[b]) { |
| i++ |
| continue |
| } |
| if start < i { |
| buf.WriteString(s[start:i]) |
| } |
| switch b { |
| case '\\', '"': |
| buf.WriteByte('\\') |
| buf.WriteByte(b) |
| case '\n': |
| buf.WriteByte('\\') |
| buf.WriteByte('n') |
| case '\r': |
| buf.WriteByte('\\') |
| buf.WriteByte('r') |
| case '\t': |
| buf.WriteByte('\\') |
| buf.WriteByte('t') |
| case '\b': |
| buf.WriteByte('\\') |
| buf.WriteByte('b') |
| case '\f': |
| buf.WriteByte('\\') |
| buf.WriteByte('f') |
| default: |
| // This encodes bytes < 0x20 except for \t, \n and \r. |
| // If escapeHTML is set, it also escapes <, >, and & |
| // because they can lead to security holes when |
| // user-controlled strings are rendered into JSON |
| // and served to some browsers. |
| buf.WriteString(`\u00`) |
| buf.WriteByte(hexChars[b>>4]) |
| buf.WriteByte(hexChars[b&0xF]) |
| } |
| i++ |
| start = i |
| continue |
| } |
| c, size := utf8.DecodeRuneInString(s[i:]) |
| if c == utf8.RuneError && size == 1 { |
| if start < i { |
| buf.WriteString(s[start:i]) |
| } |
| buf.WriteString(`\ufffd`) |
| i += size |
| start = i |
| continue |
| } |
| // U+2028 is LINE SEPARATOR. |
| // U+2029 is PARAGRAPH SEPARATOR. |
| // They are both technically valid characters in JSON strings, |
| // but don't work in JSONP, which has to be evaluated as JavaScript, |
| // and can lead to security holes there. It is valid JSON to |
| // escape them, so we do so unconditionally. |
| // See http://timelessrepo.com/json-isnt-a-javascript-subset for discussion. |
| if c == '\u2028' || c == '\u2029' { |
| if start < i { |
| buf.WriteString(s[start:i]) |
| } |
| buf.WriteString(`\u202`) |
| buf.WriteByte(hexChars[c&0xF]) |
| i += size |
| start = i |
| continue |
| } |
| i += size |
| } |
| if start < len(s) { |
| buf.WriteString(s[start:]) |
| } |
| buf.WriteByte('"') |
| return buf.String() |
| } |
| |
| func formatDouble(f float64) string { |
| var s string |
| if math.IsInf(f, 1) { |
| s = "Infinity" |
| } else if math.IsInf(f, -1) { |
| s = "-Infinity" |
| } else if math.IsNaN(f) { |
| s = "NaN" |
| } else { |
| // Print exactly one decimalType place for integers; otherwise, print as many are necessary to |
| // perfectly represent it. |
| s = strconv.FormatFloat(f, 'G', -1, 64) |
| if !strings.ContainsRune(s, '.') { |
| s += ".0" |
| } |
| } |
| |
| return s |
| } |
| |
| type sortableString []rune |
| |
| func (ss sortableString) Len() int { |
| return len(ss) |
| } |
| |
| func (ss sortableString) Less(i, j int) bool { |
| return ss[i] < ss[j] |
| } |
| |
| func (ss sortableString) Swap(i, j int) { |
| oldI := ss[i] |
| ss[i] = ss[j] |
| ss[j] = oldI |
| } |
| |
| func sortStringAlphebeticAscending(s string) string { |
| ss := sortableString([]rune(s)) |
| sort.Sort(ss) |
| return string([]rune(ss)) |
| } |
| |
| func docAsArray(d Document, debug bool) string { |
| if len(d) < 5 { |
| return "" |
| } |
| var buf bytes.Buffer |
| buf.WriteByte('[') |
| |
| length, rem, _ := ReadLength(d) // We know we have enough bytes to read the length |
| |
| length -= 4 |
| |
| var elem Element |
| var ok bool |
| first := true |
| for length > 1 { |
| if !first { |
| buf.WriteByte(',') |
| } |
| elem, rem, ok = ReadElement(rem) |
| length -= int32(len(elem)) |
| if !ok { |
| return "" |
| } |
| if debug { |
| fmt.Fprintf(&buf, "%s ", elem.Value().DebugString()) |
| } else { |
| fmt.Fprintf(&buf, "%s", elem.Value()) |
| } |
| first = false |
| } |
| buf.WriteByte(']') |
| |
| return buf.String() |
| } |