| // Copyright 2013 sigu-399 ( https://github.com/sigu-399 ) |
| // |
| // 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 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // author sigu-399 |
| // author-github https://github.com/sigu-399 |
| // author-mail sigu.399@gmail.com |
| // |
| // repository-name gojsonschema |
| // repository-desc An implementation of JSON Schema, based on IETF's draft v4 - Go language. |
| // |
| // description Various utility functions. |
| // |
| // created 26-02-2013 |
| |
| package gojsonschema |
| |
| import ( |
| "encoding/json" |
| "fmt" |
| "log" |
| "math" |
| "reflect" |
| ) |
| |
| func mustBeInteger(what interface{}) *int { |
| var number int |
| if isKind(what, reflect.Float64) { |
| fnumber := what.(float64) |
| if isFloat64AnInteger(fnumber) { |
| number = int(fnumber) |
| return &number |
| } else { |
| return nil |
| } |
| } else if isKind(what, reflect.Int) { |
| number = what.(int) |
| return &number |
| } |
| return nil |
| } |
| |
| func mustBeNumber(what interface{}) *float64 { |
| var number float64 |
| |
| if isKind(what, reflect.Float64) { |
| number = what.(float64) |
| return &number |
| } else if isKind(what, reflect.Int) { |
| number = float64(what.(int)) |
| return &number |
| } |
| return nil |
| } |
| |
| func isKind(what interface{}, kind reflect.Kind) bool { |
| return reflect.ValueOf(what).Kind() == kind |
| } |
| |
| func existsMapKey(m map[string]interface{}, k string) bool { |
| _, ok := m[k] |
| return ok |
| } |
| |
| func isStringInSlice(s []string, what string) bool { |
| for i := range s { |
| if s[i] == what { |
| return true |
| } |
| } |
| return false |
| } |
| |
| // same as ECMA Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER |
| const ( |
| max_json_float = float64(1<<53 - 1) // 9007199254740991.0 2^53 - 1 |
| min_json_float = -float64(1<<53 - 1) //-9007199254740991.0 -2^53 - 1 |
| ) |
| |
| // allow for integers [-2^53, 2^53-1] inclusive |
| func isFloat64AnInteger(f float64) bool { |
| |
| if math.IsNaN(f) || math.IsInf(f, 0) || f < min_json_float || f > max_json_float { |
| return false |
| } |
| |
| return f == float64(int64(f)) || f == float64(uint64(f)) |
| } |
| |
| // formats a number so that it is displayed as the smallest string possible |
| func validationErrorFormatNumber(n float64) string { |
| |
| if isFloat64AnInteger(n) { |
| return fmt.Sprintf("%d", int64(n)) |
| } |
| |
| return fmt.Sprintf("%g", n) |
| } |
| |
| func marshalToJsonString(value interface{}) (*string, error) { |
| |
| mBytes, err := json.Marshal(value) |
| if err != nil { |
| return nil, err |
| } |
| |
| sBytes := string(mBytes) |
| return &sBytes, nil |
| } |
| |
| const internalLogEnabled = false |
| |
| func internalLog(message string) { |
| if internalLogEnabled { |
| log.Print(message) |
| } |
| } |