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add uint8 parameter type, and mvc and hero - this commit may be a point of tutorial on how to add a completely new type from scratch to the hero for future contributors

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Former-commit-id: dc7a7e6c97ef0c644a22e92072e4bdb98ae10582
This commit is contained in:
Gerasimos (Makis) Maropoulos
2018-08-24 00:56:54 +03:00
parent ef5f383227
commit cbd8fe95ac
12 changed files with 200 additions and 4 deletions
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53
core/memstore/memstore.go
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@@ -197,6 +197,39 @@ func (e Entry) Float32Default(key string, def float32) (float32, error) {
return def, errFindParse.Format("float32", e.Key)
}
// Uint8Default returns the entry's value as uint8.
// If not found returns "def" and a non-nil error.
func (e Entry) Uint8Default(def uint8) (uint8, error) {
v := e.ValueRaw
if v == nil {
return def, errFindParse.Format("uint8", e.Key)
}
if vuint8, ok := v.(uint8); ok {
return vuint8, nil
}
if vint, ok := v.(int); ok {
if vint < 0 || vint > 255 {
return def, errFindParse.Format("uint8", e.Key)
}
return uint8(vint), nil
}
if vstring, sok := v.(string); sok {
vuint64, err := strconv.ParseUint(vstring, 10, 8)
if err != nil {
return def, err
}
if vuint64 > 255 {
return def, errFindParse.Format("uint8", e.Key)
}
return uint8(vuint64), nil
}
return def, errFindParse.Format("uint8", e.Key)
}
// Uint64Default returns the entry's value as uint64.
// If not found returns "def" and a non-nil error.
func (e Entry) Uint64Default(def uint64) (uint64, error) {
@@ -449,6 +482,26 @@ func (r *Store) GetIntDefault(key string, def int) int {
return def
}
// GetUint8 returns the entry's value as uint8, based on its key.
// If not found returns 0 and a non-nil error.
func (r *Store) GetUint8(key string) (uint8, error) {
v := r.GetEntry(key)
if v == nil {
return 0, errFindParse.Format("uint8", key)
}
return v.Uint8Default(0)
}
// GetUint8Default returns the entry's value as uint8, based on its key.
// If not found returns "def".
func (r *Store) GetUint8Default(key string, def uint8) uint8 {
if v, err := r.GetUint8(key); err == nil {
return v
}
return def
}
// GetUint64 returns the entry's value as uint64, based on its key.
// If not found returns 0 and a non-nil error.
func (r *Store) GetUint64(key string) (uint64, error) {