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SVN客户端脚�?LUA)

gewala — Sun, 08 Aug 2010 13:22:00 GMT

1 --打开日志文�g
2 svnlogPath = assert(arg[3], "路径为空");
3 svnlog = assert(io.open(svnlogPath, "r"), "打开日志文�g��p�|�Q?/span>");
4
5 --日志是否为空
6 if svnlog:read(0) == nil then
7     --日志为空
8     svnlog:close();
9     io.stderr:write("请填写日志！");
10     os.exit(1);
11 else
12     --��查日志内�?br>13     local count = 1;
14     while true do
15         local line = svnlog:read();
16
17         if line == nil then
18             break;
19         end
20
21         --查找是否匚w��
22         if string.len(line) > 0 then
23             if not string.find(line, ".:%s*%S") then
24                if not string.find(line, ".\239\188\154%s*%S") then
25                  svnlog:close();
26                  io.stderr:write("日志没有填写完整");
27                  os.exit(1);
28                 end
29             end
30         end
31
32         count = count + 1;
33     end
34
35     --��查行数是�?/span>>6�?br>36     if count < 6 then
37          svnlog:close();
38          io.stderr:write("请填写完整日�? ");
39          os.exit(1);
40     end
41
42 end
43
44 svnlog:close();
45

gewala 2010-08-08 21:22 发表评论

在EZ430开发板的串口类异常

gewala — Sat, 07 Nov 2009 16:00:00 GMT

我发��C��口类cnComm在串口�{USB的设备上有些能工作（USB430�Q�，但在EZ430上却不能工作�Q�很奇怪！我怀疑是��g问题�Q�毕竟串口�{USB��g上有差别。我发现cnComm的线�E�一直收��C��些不存在的事�Ӟ��D��d�@环�?br> 今天上网看了一��资料，说是那个DCB配置了硬件握手协议导致了一些不支持�q�个功能的串口�{USB讑֤�出错。我觉得有点道理�Q�有旉��试验一下。先看一下cnComm的DCB配置情况�?br>

摘抄

使用API�q�行串口�~�程时设�|�串口属性（SetCommState�Q�是一条必�l�之路，其DCB�l�构几乎�늛�了所有和串口通讯相关的资源设�|�，�׃��有些讑֤�需要��用RTS和CTS�q�行数据的收发控�Ӟ��Z��提高接收效率可以使用RTS握手选项dcb.fRtsControl=RTS_CONTROL_HANDSHAKE; 在标准串口下使用一切正常，但在一些没有标准串口的�W�记本上却不能发送数据，后经�q�仔�l�排查发现就是RTS握手选项搞的��|��关闭此选项后一切恢复正常�?/p>

�׃��公司只有一�U�USB转RS232的设备，所以也没有��试其他品牌/�c�d��的设备是否也存在�q�个问题。如果有朋友遇到串口通讯在USB转RS232下不好用的时候，可以看看RTS握手选项的状态�?/p>

发现cnComm打开了发送和接收的流控制�Q�fDtrControl=DTR_CONTROL_ENABLE,fRtrControl=RTR_CONTROL_ENABLE。有可能是这个原因�?/span>

gewala 2009-11-08 00:00 发表评论

gewala — Tue, 03 Nov 2009 14:53:00 GMT

最�q�发现CRT控制台程序没有TRACE和内存溢出检查，很郁闗��无聊中��ȝ��MSDN的Memory Management and the Debug Heap��，发现C的Debug版本用_malloc_dbg代替malloc,而_malloc_dbg者给数据堆加上一个控制头�l�成链表�Q�方便记录溢出。原话如下：
When you request a memory block, the debug heap manager allocates from the base heap a slightly larger block of memory than requested and returns a pointer to your portion of that block. For example, suppose your application contains the call: malloc( 10 ). In a release build, malloc would call the base heap allocation routine requesting an allocation of 10 bytes. In a debug build, however, malloc would call _malloc_dbg, which would then call the base heap allocation routine requesting an allocation of 10 bytes plus approximately 36 bytes of additional memory. All the resulting memory blocks in the debug heap are connected in a single linked list, ordered according to when they were allocated:
那个控制头的数据�l�构如下�Q?br>

typedef struct _CrtMemBlockHeader
{
// Pointer to the block allocated just before this one:
   struct _CrtMemBlockHeader *pBlockHeaderNext;
// Pointer to the block allocated just after this one:
   struct _CrtMemBlockHeader *pBlockHeaderPrev;
   char *szFileName;   // File name
   int nLine;          // Line number
   size_t nDataSize;   // Size of user block
   int nBlockUse;      // Type of block
   long lRequest;      // Allocation number
// Buffer just before (lower than) the user's memory:
   unsigned char gap[nNoMansLandSize];
} _CrtMemBlockHeader;

�q�个nBlockUse�?�U�内存块�Q�具体含义还没有搞清楚，分别如下

/* Memory block identification */
#define _FREE_BLOCK      0
#define _NORMAL_BLOCK    1
#define _CRT_BLOCK       2
#define _IGNORE_BLOCK    3
#define _CLIENT_BLOCK    4
#define _MAX_BLOCKS      5

��内存溢出用_CrtDumpMemoryLeaks(),�?span style="font-weight: bold;">crtdbg.h中定义。有旉��研究一下crtdbg.h文�g�?br> 参�?a >http://www.cnblogs.com/phinecos/archive/2009/10/29/1592604.html

gewala 2009-11-03 22:53 发表评论

gewala — Wed, 21 Oct 2009 14:18:00 GMT

从NIST�|�站上下了个旉��软�g�Q�看��h��很古老，但功能强大。我在NIST�|�站上一直找不到�|�络旉��服务器，但在�q�个软�g中发现可以下载更新服务器地址�Q�很好很强大�?br>下蝲

gewala 2009-10-21 22:18 发表评论

gewala — Tue, 20 Oct 2009 14:36:00 GMT

《window�E�序设计》果然是�l�典�Q�相对于MFC来说SDK��直是�q�璞归真啊。��l�摘录一些API函数和技巧：

CheckRadioButton(hwnd,IDC_SERVER1,IDC_SERVER10, wServer);

1�?font>Selects (adds a check mark to) a given radio button in a group and clears (removes a check mark from) all other radio buttons in the group. 在IDC_SERVER1-IDC_SERVER10中选中wServer的ID�Q�有点像分组�?br>

DialogBoxParam (hInst, TEXT ("Servers"), hwnd, ServerDlg, (LPARAM) szIPAddr);

2、可以在WM_INITDIALOG的LPARAM传参敎ͼ�建立模态对话框。ServerDlg为消息处理函敎ͼ�szIPAddr为参敎ͼ�在WM_INITDIALOG消息响应中处理LPARAM的倹{�?br>

typedef char * va_list;

#define _INTSIZEOF(n)   ( (sizeof(n) + sizeof(int) - 1) & ~(sizeof(int) - 1) )
#define va_start(ap,v)  ( ap = (va_list)&v + _INTSIZEOF(v) )
#define va_arg(ap,t)    ( *(t *)((ap += _INTSIZEOF(t)) - _INTSIZEOF(t)) )
#define va_end(ap)      ( ap = (va_list)0 )

3、va_list可变参数的结构，有点复杂慢慢看�?br> 一般的用法是这�?个�h理解)
va_list args; //声明变量
va_start(args, fmt); //开始解析。args指向fmt后面的参�?
TYPE var = va_arg(args, TYPE); //取下一个参数�ƈ�q�回。args指向下一个参�?
va_end(args); //�l�束解析
http://hi.baidu.com/kang_liang/blog/item/168c9059a9a1ca2d2934f05f.html

4、wsprintf和wvsprintf的区别，从它们的参数可以看出�?br>

int wsprintf(
  LPTSTR lpOut,    // output buffer
  LPCTSTR lpFmt,   // format-control string
                // optional arguments
);

int wvsprintf( LPTSTR lpOutput, // buffer for output
               LPCTSTR lpFormat, // format-control string
               va_list // variable list of format-control arguments
   );

wsprintf�U��a是格式化字符�Ԍ��wvsprintf是以参数列表Va_list格式化字�W�串�?/p>

gewala 2009-10-20 22:36 发表评论

gewala — Mon, 19 Oct 2009 15:05:00 GMT

最�q�看Petzold的《windows�E�序设计》，在Internet那章中看到如何在字符串中提取IP地址�Q�特地标��C��下：

1 GetDlgItemTextA (hwnd, wServer, szLabel, sizeof (szLabel));
2 strtok (szLabel, "(");
3 strcpy (szServer, strtok (NULL, ")"));

在Msdn上查了一下，有下面一�D�：

On the first call to strtok , the function skips leading delimiters and returns a pointer to the first token in strToken , terminating the token with a null character. More tokens can be broken out of the remainder of strToken by a series of calls to strtok . Each call to strtok modifies strToken by inserting a null character after the token returned by that call. To read the next token from strToken , call strtok with a NULL value for the strToken argument. The NULL strToken argument causes strtok to search for the next token in the modified strToken . The strDelimit argument can take any value from one call to the next so that the set of delimiters may vary.

Warning Each of these functions uses a static variable for parsing the string into tokens. If multiple or simultaneous calls are made to the same function, a high potential for data corruption and inaccurate results exists. Therefore, do not attempt to call the same function simultaneously for different strings and be aware of calling one of these function from within a loop where another routine may be called that uses the same function. However, calling this function simultaneously from multiple threads does not have undesirable effects.

看来用了静态变量，�q�好有多�U�程的C�q�行库，否则在多�U�程在有�ȝ��了�?br>

gewala 2009-10-19 23:05 发表评论