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// Copyright [2019] LinkedIn Corp. 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
// http://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.
package goavro
import (
"fmt"
"io"
"unicode"
)
// advanceAndConsume advances to non whitespace and returns an error if the next
// non whitespace byte is not what is expected.
func advanceAndConsume(buf []byte, expected byte) ([]byte, error) {
var err error
if buf, err = advanceToNonWhitespace(buf); err != nil {
return nil, err
}
if actual := buf[0]; actual != expected {
return nil, fmt.Errorf("expected: %q; actual: %q", expected, actual)
}
return buf[1:], nil
}
// advanceToNonWhitespace consumes bytes from buf until non-whitespace character
// is found. It returns error when no more bytes remain, because its purpose is
// to scan ahead to the next non-whitespace character.
func advanceToNonWhitespace(buf []byte) ([]byte, error) {
for i, b := range buf {
if !unicode.IsSpace(rune(b)) {
return buf[i:], nil
}
}
return nil, io.ErrShortBuffer
}
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