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testing mapping

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This commit is contained in:
Hayden Parker
2016-02-06 19:13:54 -08:00
parent a5c6cb8041
commit d1699e946e
3 changed files with 208 additions and 26 deletions
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41
lib/common/mapping.go
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@ -14,24 +14,31 @@ type MappingValues [][2]String
// the form of a MappingValues.
//
func (mapping Mapping) Values() (map_values MappingValues, errs []error) {
// check length and append any errors needed, max: 65537
// sanity check no data is missing
var str String
var remainder = mapping
var err error
length := Integer(remainder[:2])
remainder = remainder[2:]
mapping_len := len(mapping)
if mapping_len > length+2 {
errs = append(errs, errors.New("warning parsing mapping: data exists beyond length of mapping"))
} else if length+2 > mapping_len {
errs = append(errs, errors.New("warning parsing mapping: mapping length exceeds provided data"))
}
for {
// Read a key, breaking on fatal errors
// and appending warnings
str, remainder, err = ReadString(remainder)
key_str := str
if err != nil {
errs = append(errs, err)
if stopValueRead(err) {
errs = append(errs, err)
return
}
}
if !beginsWith(remainder, "=") {
if !beginsWith(remainder, 0x3d) {
errs = append(errs, errors.New("mapping format violation, expected ="))
return
}
@ -42,12 +49,12 @@ func (mapping Mapping) Values() (map_values MappingValues, errs []error) {
str, remainder, err = ReadString(remainder)
val_str := str
if err != nil {
errs = append(errs, err)
if stopValueRead(err) {
errs = append(errs, err)
return
}
}
if !beginsWith(remainder, ";") {
if !beginsWith(remainder, 0x3b) {
errs = append(errs, errors.New("mapping format violation, expected ;"))
return
}
@ -67,6 +74,16 @@ func (mapping Mapping) Values() (map_values MappingValues, errs []error) {
// Returns true if two keys in a mapping are identical
//
func (mapping Mapping) HasDuplicateKeys() bool {
seen_values := make(map[string]bool)
values, _ := mapping.Values()
for _, pair := range values {
key, _ := pair[0].Data()
if _, present := seen_values[key]; present {
return true
} else {
seen_values[key] = true
}
}
return false
}
@ -79,8 +96,10 @@ func ValuesToMapping(values MappingValues) Mapping {
var mapping Mapping
mappingOrder(values)
for _, kv_pair := range values {
key_string := String(kv_pair[0])
key_value := String(kv_pair[1])
key_string := kv_pair[0]
key_string = append(key_string, []byte("=")[0])
key_value := kv_pair[1]
key_value = append(key_value, []byte(";")[0])
mapping = append(append(mapping, key_string...), key_value...)
}
map_len := len(mapping)
@ -152,7 +171,7 @@ func stopValueRead(err error) bool {
return err.Error() == "error parsing string: zero length"
}
func beginsWith(bytes []byte, str string) bool {
func beginsWith(bytes []byte, chr byte) bool {
return len(bytes) != 0 &&
string(bytes[0]) == str
bytes[0] == chr
}