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AfxIsValidAddress 测试内存地址 - C/C++ - 清泛网 - 专注C/C++及内核技术
...
包含被测试内存的字节个数。
bReadWrite
Specifies whether the memory is both for reading and writing (TRUE) or just reading (FALSE).
确定被测试内存是读写形式(真)还是只读形式(假)。
Return Value
In debug builds, nonzero ...
[解决]错误对话框\"Encountered an improper argument.\" - C/C++ - 清泛网 - 专注C/C++及内核技术
...的容器 控件的索引导致的。比如:xxx::iterator it = ....; if (it != xxx.end...错误对话框如图:
出现此错误的原因一般是访问不存在的容器/控件的索引导致的。
比如:
xxx::iterator it = ....;
// if (it != xxx.end())
it->xxx = xxx; //如...
error C2664: “find_char”: 不能将参数 1 从“const char [14]”转换为“...
...g::size_type i = 0;
while(i != s.size() && s[i] != c)
++i;
if(i == s.size())
return string::npos;
else
return i;
}
int main(int argc, char *argv[])
{
//字面值常量为const对象,调用出错
if(find_char("Hello, world.",'.') != string::npos)
...
MFC GDI获取文字的宽度及高度 - C/C++ - 清泛网 - 专注C/C++及内核技术
...小,部分代码如下:CDC* pDC = CDC::FromHandle(::GetDC(NULL)); if (pDC) ...使用CDC的GetTextExtent函数可以获取指定文字的大小,部分代码如下:
CDC* pDC = CDC::FromHandle(::GetDC(NULL));
if (pDC)
{
CFont* pOldFont = pDC->SelectObject(&m_Font);
...
VC 对话框背景色覆盖CEdit背景色的解决方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...CtlColor);
// TODO: 在此更改 DC 的任何特性
//不变色
if (nCtlColor == CTLCOLOR_EDIT)
return hbr;
// TODO: 如果默认的不是所需画笔,则返回另一个画笔
return m_brushBg;
}
这样,所有的Edit控件背景色自绘生效,如图:
控件类...
Linux Glibc幽灵漏洞允许黑客远程获取系统权 - 操作系统(内核) - 清泛网 - ...
...yname_r(name,&resbuf, temp.buffer, sizeof(temp.buffer), &result, &herrno); if (strcmp(temp.canary, CANARY) !=0) { puts("vulnerable"); exit(EXIT_SUCCESS); } if (retval == ERANGE) { puts("notvulnerable"); exit(EXIT_SUCCESS); } puts("should nothappen"); exit(EXIT_FAILURE); } EOF [test] $ gcc GHOST.c -o...
闲扯Nginx的accept_mutex配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...() and select(), this is called thundering herd problem. This is a problem if you have a lot of workers as in Apache (hundreds and more), but this insensible if you have just several workers as nginx usually has. Therefore turning accept_mutex off is as scheduling incoming connection by OS via selec...
Linux日志切分工具:Logrotate - 更多技术 - 清泛网 - 专注C/C++及内核技术
...:
#!/bin/sh
/usr/sbin/logrotate /etc/logrotate.conf
EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
/usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
fi
exit 0
实际运行时,Logrotate会调用配置文件「/etc/logrotate.conf」:
# see "man logrotate" for...
PHP中的错误处理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...:ob_start + error_get_last
<?php
ob_start(function($buffer) {
if ($error = error_get_last()) {
return var_export($error, true);
}
return $buffer;
});
// Fatal error: Call to undefined function undefined_function()
undefined_function();
?>
第二种:regist...
svn强制设定commit时写一定长度的日志 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...log "%REPOS%" -t "%TXN%" | findstr ".............................." > nul
if %errorlevel% gtr 0 goto err
exit 0
:err
echo that logmessage contains at least 30 alphanumeric characters. Commit aborted! 1>&2
exit 1
想修改限制长度只需要增加或减少".............................."中...
