mirror of
https://github.com/xiaoqidun/ofdgo.git
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44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ofdgo
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import (
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"fmt"
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"strconv"
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"strings"
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)
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// signatureIDSequence 签名及签章注释共用的编号上限，与文档图元编号相互独立
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type signatureIDSequence uint64
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// observe 记录已有签章标识的编号上限，其他命名形式保持不变
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// 入参: id 已有标识
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func (s *signatureIDSequence) observe(id string) {
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n, err := strconv.ParseUint(strings.TrimPrefix(id, "s"), 10, 64)
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if err == nil && n > uint64(*s) {
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*s = signatureIDSequence(n)
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}
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}
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// next 分配采用sNNN格式的签章标识
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// 返回: string 新标识, error 编号耗尽错误
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func (s *signatureIDSequence) next() (string, error) {
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if uint64(*s) == ^uint64(0) {
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return "", fmt.Errorf("signature ID exhausted")
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}
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*s++
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return "s" + strconv.FormatUint(uint64(*s), 10), nil
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}
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