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|
//go:generate go run ../cmd/generator/main.go
//go:generate go fmt codepoint.go
package ucd
import (
"fmt"
"strings"
)
func NormalizeCharacterProperty(propName, propVal string) (string, error) {
if propName == "" {
propName = "gc"
}
name, ok := propertyNameAbbs[normalizeSymbolicValue(propName)]
if !ok {
return "", fmt.Errorf("unsupported character property name: %v", propName)
}
props, ok := derivedCoreProperties[name]
if !ok {
return "", nil
}
var b strings.Builder
yes, ok := binaryValues[normalizeSymbolicValue(propVal)]
if !ok {
return "", fmt.Errorf("unsupported character property value: %v", propVal)
}
if yes {
fmt.Fprint(&b, "[")
} else {
fmt.Fprint(&b, "[^")
}
for _, prop := range props {
fmt.Fprint(&b, prop)
}
fmt.Fprint(&b, "]")
return b.String(), nil
}
func IsContributoryProperty(propName string) bool {
if propName == "" {
return false
}
for _, p := range contributoryProperties {
if propName == p {
return true
}
}
return false
}
func FindCodePointRanges(propName, propVal string) ([]*CodePointRange, bool, error) {
if propName == "" {
propName = "gc"
}
name, ok := propertyNameAbbs[normalizeSymbolicValue(propName)]
if !ok {
return nil, false, fmt.Errorf("unsupported character property name: %v", propName)
}
switch name {
case "gc":
val, ok := generalCategoryValueAbbs[normalizeSymbolicValue(propVal)]
if !ok {
return nil, false, fmt.Errorf("unsupported character property value: %v", propVal)
}
vals, ok := compositGeneralCategories[val]
if !ok {
vals = []string{val}
}
var ranges []*CodePointRange
for _, v := range vals {
rs, ok := generalCategoryCodePoints[v]
if !ok {
return nil, false, fmt.Errorf("invalid value of the General_Category property: %v", v)
}
ranges = append(ranges, rs...)
}
return ranges, false, nil
case "oalpha":
yes, ok := binaryValues[normalizeSymbolicValue(propVal)]
if !ok {
return nil, false, fmt.Errorf("unsupported character property value: %v", propVal)
}
if yes {
return otherAlphabeticCodePoints, false, nil
} else {
return otherAlphabeticCodePoints, true, nil
}
case "olower":
yes, ok := binaryValues[normalizeSymbolicValue(propVal)]
if !ok {
return nil, false, fmt.Errorf("unsupported character property value: %v", propVal)
}
if yes {
return otherLowercaseCodePoints, false, nil
} else {
return otherLowercaseCodePoints, true, nil
}
case "oupper":
yes, ok := binaryValues[normalizeSymbolicValue(propVal)]
if !ok {
return nil, false, fmt.Errorf("unsupported character property value: %v", propVal)
}
if yes {
return otherUppercaseCodePoints, false, nil
} else {
return otherUppercaseCodePoints, true, nil
}
case "wspace":
yes, ok := binaryValues[normalizeSymbolicValue(propVal)]
if !ok {
return nil, false, fmt.Errorf("unsupported character property value: %v", propVal)
}
if yes {
return whiteSpaceCodePoints, false, nil
} else {
return whiteSpaceCodePoints, true, nil
}
}
// If the process reaches this code, it's a bug. We must handle all of the properties registered with
// the `propertyNameAbbs`.
return nil, false, fmt.Errorf("character property '%v' is unavailable", propName)
}
|
