C语言读取配置文件

自从大学学完C之后，就再也没用过它了，

在网上找代码，七拼八凑之后，终于成形~~勉强能用，不喜勿喷，^_^！

int GetValue(const wchar_t *key, wchar_t *value)

{

    FILE* fpcfg = NULL;

    wchar_t var[256], val[256];//key,value

    wchar_t linebuf[1024];

    wchar_t* ptr1 = NULL;

    wchar_t* ptr2 = NULL;

    wchar_t* delimiter = NULL;

    int k = 0;



    assert(key != NULL && value != NULL);



    //testConfig.ini中的内容为：

    //key1 = value1

    //key2 = value2

    fpcfg = fopen("testConfig.ini", "rt");

    if(fpcfg == NULL)

    {

        return -1;

    }



    while(fgetws(linebuf, sizeof(linebuf), fpcfg) != NULL)

    {

        //ignore annotation line

        if(linebuf[0]=='#' || linebuf[0]==';')

        {

            continue;

        }



        //ignore empty line

        ptr1 = linebuf;

        while(*ptr1==0x20 || *ptr1=='\t')

            ptr1++;

        if(!*ptr1 || *ptr1=='\n')

        {

            continue;

        }

        //search "="

        ptr2 = ptr1;

        while(*ptr2 && *ptr2!='=')

        {

            ptr2++;

        }

        delimiter = *ptr2?ptr2:NULL;

        //if current line start with "=", continue next line

        if(!delimiter || delimiter==ptr1)

        {

            continue;

        }

        //*delimiter = '\0';

        ptr2 = delimiter-1;

        //ignore blank before "="

        while(*ptr2==0x20 || *ptr2=='\t')

        {    ptr2--;}

        //check key length

        k = ptr2-ptr1+1;

        if(k>(int)sizeof(var)-1)

        {

            //The key name is out of length."

            continue;

        }

        //save key name

        ptr2 = var;

        while(k--)

        {

            *ptr2++ = *ptr1++;

        }

        *ptr2 = '\0';



        //locate value's start point(may be '\0')

        ptr1 = delimiter+1;

        //ignore blank after "="

        while(*ptr1==0x20 || *ptr1=='\t')

        {

            ptr1++;

        }

        //set ptr2 point to line end

        ptr2 = linebuf;

        while(*ptr2)

        {ptr2++;}

        ptr2--;

        if(*ptr2=='\n')

        {

            *ptr2-- = '\0';

        }

        //ignore blank line end

        //if value is empty,ptr2 --> = , ptr1>ptr2

        while(*ptr2==0x20 || *ptr2=='\t' )

        {

            ptr2--;

        }

        //check value length

        k = ptr2-ptr1+1;

        if(k>(int)sizeof(val)-1)

        {

            //The value is out of length"

            continue;

        }

        //save value

        ptr2 = val;



        while(k-->0)

        {

            *ptr2++ = *ptr1++;

        }



        *ptr2 = '\0';



        if(wcsncmp(var,key, wcslen(var) > wcslen(key) ? wcslen(var) : wcslen(key))==0){

            wcsncpy(value,val, wcslen(val));

            return 0;

        }

    }

    fclose(fpcfg);

    fpcfg = NULL;



    return -1;

}

恩，再来个main方法测试下：

int _tmain(int argc, wchar_t* argv[])

{

    wchar_t value[256] = {0};



    wchar_t keyParam[256] = L"ip";

    wchar_t *temp = (wchar_t *)malloc(sizeof(wchar_t) * 256);



    if(temp != NULL){

        memset(temp, 0x00, sizeof(wchar_t) * 256);

    }else{

        return -1;

    }



    if(0 == GetValue(keyParam, temp)){

        wcsncpy(value, temp, wcslen(temp));

        wprintf(L"Found:  %s\n", value);

    }else{

        wprintf(L"Not Found!!\n");

    }



    if(temp != NULL)

    {

        free(temp);    

        temp = NULL;

    }

    return 0;

}

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好吧，这确实是个很丑陋的版本，仅供自己留着备用。

点这里下载