mirror of
https://github.com/xiaoqidun/ofdgo.git
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79 lines
2.4 KiB
Go
79 lines
2.4 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 webview
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import (
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"os"
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"strings"
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"syscall"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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// memoryStatusProc 查询系统物理内存和提交额度
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var memoryStatusProc = syscall.NewLazyDLL("kernel32.dll").NewProc("GlobalMemoryStatusEx")
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// instanceDirectory 解析数据目录的实际路径，使目录联接及大小写别名复用同一实例
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// 入参: path 数据目录路径
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// 返回: string 规范路径, error 路径解析错误
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func instanceDirectory(path string) (string, error) {
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dir, err := os.Open(path)
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if err != nil {
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return "", err
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}
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defer dir.Close()
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buffer := make([]uint16, 256)
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for {
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n, err := windows.GetFinalPathNameByHandle(windows.Handle(dir.Fd()), &buffer[0], uint32(len(buffer)), 0)
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if err != nil {
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return "", err
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}
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if n < uint32(len(buffer)) {
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return strings.ToLower(windows.UTF16ToString(buffer[:n])), nil
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}
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buffer = make([]uint16, n+1)
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}
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}
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// fontNameLanguage 获取系统显示语言对应的OpenType名称表标识
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// 返回: uint16 名称表平台标识, uint16 系统显示语言标识
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func fontNameLanguage() (uint16, uint16) {
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language, _, _ := syscall.NewLazyDLL("kernel32.dll").NewProc("GetUserDefaultUILanguage").Call()
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return 3, uint16(language)
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}
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// conversionMemory 预留系统内存后返回可用于新增转换的额度
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// 返回: int64 可用字节数，查询失败时暂停扩容
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func conversionMemory() int64 {
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status := struct {
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length uint32
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load uint32
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total uint64
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available uint64
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totalPage uint64
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availablePage uint64
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totalVirtual uint64
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availableVirtual uint64
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extended uint64
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}{}
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status.length = uint32(unsafe.Sizeof(status))
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ok, _, _ := memoryStatusProc.Call(uintptr(unsafe.Pointer(&status)))
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if ok == 0 {
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return 0
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}
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return max(0, int64(min(status.available, status.availablePage))-int64(status.total/8))
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}
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