如何在C ++中以Windows窗体形式读取dbc和asc文件 [英] How to read a dbc and asc file in windows form in C++

问题描述

我想阅读.asc文件和.dbc文件，任何人都可以建议我如何使用c ++在Windows窗体中阅读它们。



什么我试过了：



i尝试搜索但没有得到正确的信息

i want to read a .asc file and .dbc file, can anyone suggest me how to read them in windows form using c++.

What I have tried:

i tried searching but not getting correct info

推荐答案

你看了它们像任何其他文件一样使用二进制文件，例如使用Windows API函数 CreateFile / ReadFile 或C标准库 fopen / fread 函数。在阅读之前，您必须确定文件大小并分配该大小的缓冲区加1。附加字节用于在读取后附加的尾随 NULL 字节，因为两种文件类型都是纯文本文件。



Aftwerwards您可以以 char * 字符串的形式访问数据。



请注意，需要以二进制模式打开因为只有这样才能读取数据。否则，非MS文本文件（仅LF终止行）将被转换为CR-LF终止行，使得分配缓冲区太小。

You read them as binary files like any other file using for example the Windows API functions CreateFile / ReadFile or the C standard library fopen / fread functions. Before reading you have to determine the file size and allocate a buffer of that size plus one. The additional byte is for a trailing NULL byte to be appended after reading because both file types are plain text files.

Aftwerwards you can access the data as char* strings.

Note that opening in binary mode is required because only then the data are read as they are. Otherwise non-MS text files (LF only terminated lines) would be converted to CR - LF terminated lines making the allocarted buffer too small.

Quote：

我可以得到一个示例代码

can i get a example code for that

#include <sys/stat.h>

struct stat st;
FILE *f = fopen("test.asc", "rb");
if (NULL != f)
{
    fstat(_fileno(f), &st);
    char *lpszFileData = new char[st.st_size + 1];
    fread(lpszFileData, 1, st.st_size, f);
    fclose(f);
    lpszFileData[st.st_size] = 0;
    // Use lpszFileData here

    // Delete when no longer needed
    delete[] lpszFileData;
}

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