blob: 34fc86feadcc63d79a788c5f25327fe5150d7471 [file] [log] [blame]
// Copyright 2021 The Wuffs Authors.
//
// 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
//
// https://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.
//go:build ignore
// +build ignore
package main
// print-png-latin-1.go prints the UTF-8 encoding of the std/png Latin-1 table.
//
// Usage: go run print-png-latin-1.go
import (
"fmt"
"os"
)
func main() {
if err := main1(); err != nil {
os.Stderr.WriteString(err.Error() + "\n")
os.Exit(1)
}
}
func main1() error {
// The PNG spec (https://www.w3.org/TR/PNG/) says "*printable* [emphasis
// added] Latin-1 characters and spaces (only character codes 32-126 and
// 161-255 decimal are allowed)".
//
// See also https://www.w3.org/TR/2003/REC-PNG-20031110/iso_8859-1.txt
for r := rune(0); r <= 0xFF; r++ {
if (r < 32) || ((126 < r) && (r < 161)) {
fmt.Printf(" 0x0000,")
} else if r < 128 {
fmt.Printf(" 0x%04X,", r)
} else {
s := fmt.Sprintf("%c", r)
fmt.Printf(" 0x%02X%02X,", s[1], s[0]) // UTF-8 as little-endian uint16.
}
if r%8 == 7 {
fmt.Println()
}
}
return nil
}