diff options
Diffstat (limited to 'vendor/github.com/spf13/cast')
| -rw-r--r-- | vendor/github.com/spf13/cast/LICENSE | 21 | ||||
| -rw-r--r-- | vendor/github.com/spf13/cast/README.md | 72 | ||||
| -rw-r--r-- | vendor/github.com/spf13/cast/cast.go | 78 | ||||
| -rw-r--r-- | vendor/github.com/spf13/cast/caste.go | 500 |
4 files changed, 671 insertions, 0 deletions
diff --git a/vendor/github.com/spf13/cast/LICENSE b/vendor/github.com/spf13/cast/LICENSE new file mode 100644 index 0000000..4527efb --- /dev/null +++ b/vendor/github.com/spf13/cast/LICENSE @@ -0,0 +1,21 @@ +The MIT License (MIT) + +Copyright (c) 2014 Steve Francia + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE.
\ No newline at end of file diff --git a/vendor/github.com/spf13/cast/README.md b/vendor/github.com/spf13/cast/README.md new file mode 100644 index 0000000..af7a1fd --- /dev/null +++ b/vendor/github.com/spf13/cast/README.md @@ -0,0 +1,72 @@ +cast +==== + +Easy and safe casting from one type to another in Go + +Don’t Panic! ... Cast + +## What is Cast? + +Cast is a library to convert between different go types in a consistent and easy way. + +Cast provides simple functions to easily convert a number to a string, an +interface into a bool, etc. Cast does this intelligently when an obvious +conversion is possible. It doesn’t make any attempts to guess what you meant, +for example you can only convert a string to an int when it is a string +representation of an int such as “8”. Cast was developed for use in +[Hugo](http://hugo.spf13.com), a website engine which uses YAML, TOML or JSON +for meta data. + +## Why use Cast? + +When working with dynamic data in Go you often need to cast or convert the data +from one type into another. Cast goes beyond just using type assertion (though +it uses that when possible) to provide a very straightforward and convenient +library. + +If you are working with interfaces to handle things like dynamic content +you’ll need an easy way to convert an interface into a given type. This +is the library for you. + +If you are taking in data from YAML, TOML or JSON or other formats which lack +full types, then Cast is the library for you. + +## Usage + +Cast provides a handful of To_____ methods. These methods will always return +the desired type. **If input is provided that will not convert to that type, the +0 or nil value for that type will be returned**. + +Cast also provides identical methods To_____E. These return the same result as +the To_____ methods, plus an additional error which tells you if it successfully +converted. Using these methods you can tell the difference between when the +input matched the zero value or when the conversion failed and the zero value +was returned. + +The following examples are merely a sample of what is available. Please review +the code for a complete set. + +### Example ‘ToString’: + + cast.ToString("mayonegg") // "mayonegg" + cast.ToString(8) // "8" + cast.ToString(8.31) // "8.31" + cast.ToString([]byte("one time")) // "one time" + cast.ToString(nil) // "" + + var foo interface{} = "one more time" + cast.ToString(foo) // "one more time" + + +### Example ‘ToInt’: + + cast.ToInt(8) // 8 + cast.ToInt(8.31) // 8 + cast.ToInt("8") // 8 + cast.ToInt(true) // 1 + cast.ToInt(false) // 0 + + var eight interface{} = 8 + cast.ToInt(eight) // 8 + cast.ToInt(nil) // 0 + diff --git a/vendor/github.com/spf13/cast/cast.go b/vendor/github.com/spf13/cast/cast.go new file mode 100644 index 0000000..de5a686 --- /dev/null +++ b/vendor/github.com/spf13/cast/cast.go @@ -0,0 +1,78 @@ +// Copyright © 2014 Steve Francia <spf@spf13.com>. +// +// Use of this source code is governed by an MIT-style +// license that can be found in the LICENSE file. + +package cast + +import "time" + +func ToBool(i interface{}) bool { + v, _ := ToBoolE(i) + return v +} + +func ToTime(i interface{}) time.Time { + v, _ := ToTimeE(i) + return v +} + +func ToDuration(i interface{}) time.Duration { + v, _ := ToDurationE(i) + return v +} + +func ToFloat64(i interface{}) float64 { + v, _ := ToFloat64E(i) + return v +} + +func ToInt64(i interface{}) int64 { + v, _ := ToInt64E(i) + return v +} + +func ToInt(i interface{}) int { + v, _ := ToIntE(i) + return v +} + +func ToString(i interface{}) string { + v, _ := ToStringE(i) + return v +} + +func ToStringMapString(i interface{}) map[string]string { + v, _ := ToStringMapStringE(i) + return v +} + +func ToStringMapStringSlice(i interface{}) map[string][]string { + v, _ := ToStringMapStringSliceE(i) + return v +} + +func ToStringMapBool(i interface{}) map[string]bool { + v, _ := ToStringMapBoolE(i) + return v +} + +func ToStringMap(i interface{}) map[string]interface{} { + v, _ := ToStringMapE(i) + return v +} + +func ToSlice(i interface{}) []interface{} { + v, _ := ToSliceE(i) + return v +} + +func ToStringSlice(i interface{}) []string { + v, _ := ToStringSliceE(i) + return v +} + +func ToIntSlice(i interface{}) []int { + v, _ := ToIntSliceE(i) + return v +} diff --git a/vendor/github.com/spf13/cast/caste.go b/vendor/github.com/spf13/cast/caste.go new file mode 100644 index 0000000..2377896 --- /dev/null +++ b/vendor/github.com/spf13/cast/caste.go @@ -0,0 +1,500 @@ +// Copyright © 2014 Steve Francia <spf@spf13.com>. +// +// Use of this source code is governed by an MIT-style +// license that can be found in the LICENSE file. + +package cast + +import ( + "fmt" + "html/template" + "reflect" + "strconv" + "strings" + "time" + + jww "github.com/spf13/jwalterweatherman" +) + +// ToTimeE casts an empty interface to time.Time. +func ToTimeE(i interface{}) (tim time.Time, err error) { + i = indirect(i) + jww.DEBUG.Println("ToTimeE called on type:", reflect.TypeOf(i)) + + switch s := i.(type) { + case time.Time: + return s, nil + case string: + d, e := StringToDate(s) + if e == nil { + return d, nil + } + return time.Time{}, fmt.Errorf("Could not parse Date/Time format: %v\n", e) + default: + return time.Time{}, fmt.Errorf("Unable to Cast %#v to Time\n", i) + } +} + +// ToDurationE casts an empty interface to time.Duration. +func ToDurationE(i interface{}) (d time.Duration, err error) { + i = indirect(i) + jww.DEBUG.Println("ToDurationE called on type:", reflect.TypeOf(i)) + + switch s := i.(type) { + case time.Duration: + return s, nil + case int64: + d = time.Duration(s) + return + case float64: + d = time.Duration(s) + return + case string: + d, err = time.ParseDuration(s) + return + default: + err = fmt.Errorf("Unable to Cast %#v to Duration\n", i) + return + } +} + +// ToBoolE casts an empty interface to a bool. +func ToBoolE(i interface{}) (bool, error) { + i = indirect(i) + jww.DEBUG.Println("ToBoolE called on type:", reflect.TypeOf(i)) + + switch b := i.(type) { + case bool: + return b, nil + case nil: + return false, nil + case int: + if i.(int) != 0 { + return true, nil + } + return false, nil + case string: + return strconv.ParseBool(i.(string)) + default: + return false, fmt.Errorf("Unable to Cast %#v to bool", i) + } +} + +// ToFloat64E casts an empty interface to a float64. +func ToFloat64E(i interface{}) (float64, error) { + i = indirect(i) + jww.DEBUG.Println("ToFloat64E called on type:", reflect.TypeOf(i)) + + switch s := i.(type) { + case float64: + return s, nil + case float32: + return float64(s), nil + case int64: + return float64(s), nil + case int32: + return float64(s), nil + case int16: + return float64(s), nil + case int8: + return float64(s), nil + case int: + return float64(s), nil + case string: + v, err := strconv.ParseFloat(s, 64) + if err == nil { + return float64(v), nil + } + return 0.0, fmt.Errorf("Unable to Cast %#v to float", i) + default: + return 0.0, fmt.Errorf("Unable to Cast %#v to float", i) + } +} + +// ToInt64E casts an empty interface to an int64. +func ToInt64E(i interface{}) (int64, error) { + i = indirect(i) + jww.DEBUG.Println("ToInt64E called on type:", reflect.TypeOf(i)) + + switch s := i.(type) { + case int64: + return s, nil + case int: + return int64(s), nil + case int32: + return int64(s), nil + case int16: + return int64(s), nil + case int8: + return int64(s), nil + case string: + v, err := strconv.ParseInt(s, 0, 0) + if err == nil { + return v, nil + } + return 0, fmt.Errorf("Unable to Cast %#v to int64", i) + case float64: + return int64(s), nil + case bool: + if bool(s) { + return int64(1), nil + } + return int64(0), nil + case nil: + return int64(0), nil + default: + return int64(0), fmt.Errorf("Unable to Cast %#v to int64", i) + } +} + +// ToIntE casts an empty interface to an int. +func ToIntE(i interface{}) (int, error) { + i = indirect(i) + jww.DEBUG.Println("ToIntE called on type:", reflect.TypeOf(i)) + + switch s := i.(type) { + case int: + return s, nil + case int64: + return int(s), nil + case int32: + return int(s), nil + case int16: + return int(s), nil + case int8: + return int(s), nil + case string: + v, err := strconv.ParseInt(s, 0, 0) + if err == nil { + return int(v), nil + } + return 0, fmt.Errorf("Unable to Cast %#v to int", i) + case float64: + return int(s), nil + case bool: + if bool(s) { + return 1, nil + } + return 0, nil + case nil: + return 0, nil + default: + return 0, fmt.Errorf("Unable to Cast %#v to int", i) + } +} + +// From html/template/content.go +// Copyright 2011 The Go Authors. All rights reserved. +// indirect returns the value, after dereferencing as many times +// as necessary to reach the base type (or nil). +func indirect(a interface{}) interface{} { + if a == nil { + return nil + } + if t := reflect.TypeOf(a); t.Kind() != reflect.Ptr { + // Avoid creating a reflect.Value if it's not a pointer. + return a + } + v := reflect.ValueOf(a) + for v.Kind() == reflect.Ptr && !v.IsNil() { + v = v.Elem() + } + return v.Interface() +} + +// From html/template/content.go +// Copyright 2011 The Go Authors. All rights reserved. +// indirectToStringerOrError returns the value, after dereferencing as many times +// as necessary to reach the base type (or nil) or an implementation of fmt.Stringer +// or error, +func indirectToStringerOrError(a interface{}) interface{} { + if a == nil { + return nil + } + + var errorType = reflect.TypeOf((*error)(nil)).Elem() + var fmtStringerType = reflect.TypeOf((*fmt.Stringer)(nil)).Elem() + + v := reflect.ValueOf(a) + for !v.Type().Implements(fmtStringerType) && !v.Type().Implements(errorType) && v.Kind() == reflect.Ptr && !v.IsNil() { + v = v.Elem() + } + return v.Interface() +} + +// ToStringE casts an empty interface to a string. +func ToStringE(i interface{}) (string, error) { + i = indirectToStringerOrError(i) + jww.DEBUG.Println("ToStringE called on type:", reflect.TypeOf(i)) + + switch s := i.(type) { + case string: + return s, nil + case bool: + return strconv.FormatBool(s), nil + case float64: + return strconv.FormatFloat(i.(float64), 'f', -1, 64), nil + case int64: + return strconv.FormatInt(i.(int64), 10), nil + case int: + return strconv.FormatInt(int64(i.(int)), 10), nil + case []byte: + return string(s), nil + case template.HTML: + return string(s), nil + case template.URL: + return string(s), nil + case template.JS: + return string(s), nil + case template.CSS: + return string(s), nil + case template.HTMLAttr: + return string(s), nil + case nil: + return "", nil + case fmt.Stringer: + return s.String(), nil + case error: + return s.Error(), nil + default: + return "", fmt.Errorf("Unable to Cast %#v to string", i) + } +} + +// ToStringMapStringE casts an empty interface to a map[string]string. +func ToStringMapStringE(i interface{}) (map[string]string, error) { + jww.DEBUG.Println("ToStringMapStringE called on type:", reflect.TypeOf(i)) + + var m = map[string]string{} + + switch v := i.(type) { + case map[string]string: + return v, nil + case map[string]interface{}: + for k, val := range v { + m[ToString(k)] = ToString(val) + } + return m, nil + case map[interface{}]string: + for k, val := range v { + m[ToString(k)] = ToString(val) + } + return m, nil + case map[interface{}]interface{}: + for k, val := range v { + m[ToString(k)] = ToString(val) + } + return m, nil + default: + return m, fmt.Errorf("Unable to Cast %#v to map[string]string", i) + } +} + +// ToStringMapStringSliceE casts an empty interface to a map[string][]string. +func ToStringMapStringSliceE(i interface{}) (map[string][]string, error) { + jww.DEBUG.Println("ToStringMapStringSliceE called on type:", reflect.TypeOf(i)) + + var m = map[string][]string{} + + switch v := i.(type) { + case map[string][]string: + return v, nil + case map[string][]interface{}: + for k, val := range v { + m[ToString(k)] = ToStringSlice(val) + } + return m, nil + case map[string]string: + for k, val := range v { + m[ToString(k)] = []string{val} + } + case map[string]interface{}: + for k, val := range v { + m[ToString(k)] = []string{ToString(val)} + } + return m, nil + case map[interface{}][]string: + for k, val := range v { + m[ToString(k)] = ToStringSlice(val) + } + return m, nil + case map[interface{}]string: + for k, val := range v { + m[ToString(k)] = ToStringSlice(val) + } + return m, nil + case map[interface{}][]interface{}: + for k, val := range v { + m[ToString(k)] = ToStringSlice(val) + } + return m, nil + case map[interface{}]interface{}: + for k, val := range v { + key, err := ToStringE(k) + if err != nil { + return m, fmt.Errorf("Unable to Cast %#v to map[string][]string", i) + } + value, err := ToStringSliceE(val) + if err != nil { + return m, fmt.Errorf("Unable to Cast %#v to map[string][]string", i) + } + m[key] = value + } + default: + return m, fmt.Errorf("Unable to Cast %#v to map[string][]string", i) + } + return m, nil +} + +// ToStringMapBoolE casts an empty interface to a map[string]bool. +func ToStringMapBoolE(i interface{}) (map[string]bool, error) { + jww.DEBUG.Println("ToStringMapBoolE called on type:", reflect.TypeOf(i)) + + var m = map[string]bool{} + + switch v := i.(type) { + case map[interface{}]interface{}: + for k, val := range v { + m[ToString(k)] = ToBool(val) + } + return m, nil + case map[string]interface{}: + for k, val := range v { + m[ToString(k)] = ToBool(val) + } + return m, nil + case map[string]bool: + return v, nil + default: + return m, fmt.Errorf("Unable to Cast %#v to map[string]bool", i) + } +} + +// ToStringMapE casts an empty interface to a map[string]interface{}. +func ToStringMapE(i interface{}) (map[string]interface{}, error) { + jww.DEBUG.Println("ToStringMapE called on type:", reflect.TypeOf(i)) + + var m = map[string]interface{}{} + + switch v := i.(type) { + case map[interface{}]interface{}: + for k, val := range v { + m[ToString(k)] = val + } + return m, nil + case map[string]interface{}: + return v, nil + default: + return m, fmt.Errorf("Unable to Cast %#v to map[string]interface{}", i) + } +} + +// ToSliceE casts an empty interface to a []interface{}. +func ToSliceE(i interface{}) ([]interface{}, error) { + jww.DEBUG.Println("ToSliceE called on type:", reflect.TypeOf(i)) + + var s []interface{} + + switch v := i.(type) { + case []interface{}: + for _, u := range v { + s = append(s, u) + } + return s, nil + case []map[string]interface{}: + for _, u := range v { + s = append(s, u) + } + return s, nil + default: + return s, fmt.Errorf("Unable to Cast %#v of type %v to []interface{}", i, reflect.TypeOf(i)) + } +} + +// ToStringSliceE casts an empty interface to a []string. +func ToStringSliceE(i interface{}) ([]string, error) { + jww.DEBUG.Println("ToStringSliceE called on type:", reflect.TypeOf(i)) + + var a []string + + switch v := i.(type) { + case []interface{}: + for _, u := range v { + a = append(a, ToString(u)) + } + return a, nil + case []string: + return v, nil + case string: + return strings.Fields(v), nil + case interface{}: + str, err := ToStringE(v) + if err != nil { + return a, fmt.Errorf("Unable to Cast %#v to []string", i) + } + return []string{str}, nil + default: + return a, fmt.Errorf("Unable to Cast %#v to []string", i) + } +} + +// ToIntSliceE casts an empty interface to a []int. +func ToIntSliceE(i interface{}) ([]int, error) { + jww.DEBUG.Println("ToIntSliceE called on type:", reflect.TypeOf(i)) + + if i == nil { + return []int{}, fmt.Errorf("Unable to Cast %#v to []int", i) + } + + switch v := i.(type) { + case []int: + return v, nil + } + + kind := reflect.TypeOf(i).Kind() + switch kind { + case reflect.Slice, reflect.Array: + s := reflect.ValueOf(i) + a := make([]int, s.Len()) + for j := 0; j < s.Len(); j++ { + val, err := ToIntE(s.Index(j).Interface()) + if err != nil { + return []int{}, fmt.Errorf("Unable to Cast %#v to []int", i) + } + a[j] = val + } + return a, nil + default: + return []int{}, fmt.Errorf("Unable to Cast %#v to []int", i) + } +} + +// StringToDate casts an empty interface to a time.Time. +func StringToDate(s string) (time.Time, error) { + return parseDateWith(s, []string{ + time.RFC3339, + "2006-01-02T15:04:05", // iso8601 without timezone + time.RFC1123Z, + time.RFC1123, + time.RFC822Z, + time.RFC822, + time.ANSIC, + time.UnixDate, + time.RubyDate, + "2006-01-02 15:04:05Z07:00", + "02 Jan 06 15:04 MST", + "2006-01-02", + "02 Jan 2006", + "2006-01-02 15:04:05 -07:00", + "2006-01-02 15:04:05 -0700", + }) +} + +func parseDateWith(s string, dates []string) (d time.Time, e error) { + for _, dateType := range dates { + if d, e = time.Parse(dateType, s); e == nil { + return + } + } + return d, fmt.Errorf("Unable to parse date: %s", s) +} |