Pset6 functions

char* indexes(const char* path)
{
    DIR *dir_ptr = opendir(path);


    while(readdir(dir_ptr) != NULL)
    {
        struct dirent* dir_f = readdir(dir_ptr);

        if(strcmp(dir_f->d_name, "index.php") == 0)
        {
            char* path_p = malloc(strlen(path) + 1 + 9);
            strcpy(path_p, path);
            strcat(path_p, "index.php");
            return path_p;
            free(path_p);
            break;
        }
        else if(strcmp(dir_f->d_name, "index.html") == 0)
        {
            char* path_h = malloc(strlen(path) + 1 + 10);
            strcpy(path_h, path);
            strcat(path_h, "index.html");
            return path_h;
            free(path_h);
            break;
        }
        else
           break;
    }
    return NULL;
}

bool load(FILE* file, BYTE** content, size_t* length)
{
    BYTE *buf = NULL;
    int counter = 0;

    while(feof(file)==0)
    {
        fread(buf,sizeof(BYTE), 1, file);
        counter++;
    }

    *length = counter;

    // array for loading
    BYTE *b_array;

    b_array = (BYTE *)malloc(sizeof(BYTE)*counter);

    // set file start point
    fseek(file, 0, SEEK_SET);

    *content = b_array;

    int i = 0;

    while(feof(file)==0)
    {
        fread(buf,sizeof(BYTE), 1, file);
        b_array[i] = *buf;
        i++;
    }
    return true;
}

const char* lookup(const char* path)
{
     // char pointer to find dot
    char* dot_ptr;

    // array to store file type extension
    char ext[6];

    int i = 0;

    dot_ptr = strrchr(path,'.');

    do
    {
        ext[i] = *dot_ptr;
        i++;
        dot_ptr++;
    }while(*dot_ptr != '\0');

    ext[i+1] = '\0';

    if(strcasecmp(".css", ext) == 0)
        return "text/css";
    else if(strcasecmp(".html", ext) == 0)
        return "text/html";
    else if(strcasecmp(".gif", ext) == 0)
        return "image/gif";
    else if(strcasecmp(".ico", ext) == 0)
        return "image/x-icon";
    else if(strcasecmp(".jpg", ext) == 0)
        return "image/jpeg";
    else if(strcasecmp(".js", ext) == 0)
        return "text/javascript";
    else if(strcasecmp(".php", ext) == 0)
        return "text/x-php";
    else if(strcasecmp(".png", ext) == 0)
        return "image/png";
    else
        return NULL;
}

bool parse(const char* line, char* abs_path, char* query)
{
    char* ptr_line;

    // counter for space
    int sp_count = 0;

    for(ptr_line = strchr(line,'G'); *ptr_line != 13; ptr_line++) // 13 = CR
    {
        if(*ptr_line == 32) // equals to space
            sp_count++;
    }

    if(sp_count != 2)
    {
        error(400);
        return false;
    }

    char get[] = "GET ";

    // compare 4 characters between line and get
    if(strncmp(get, line, 4) != 0)
    {
        error(405);
        return false;
    }

    // pointer for first space
    char* sp_ptr;

    sp_ptr = strchr(line, 32); //32 = space
    sp_ptr++;  // one character forward

    if(*sp_ptr != '/')
    {
        error(501);
        return false;
    }

    while(*sp_ptr != 32) // space
    {
        if(*sp_ptr == 34) // double quotation
        {
            error(400);
            return false;
        }
        sp_ptr++;
    }

    // one character forward
    sp_ptr++;

    char http[] = "HTTP/1.1";

    if(strncmp(sp_ptr, http, 8) != 0)
    {
       error(505);
       return false;
    }

    char ab_pass[LimitRequestLine+1];
    int i = 0;
    char* slash_ptr;
    slash_ptr = strchr(line, '/');

    while(*slash_ptr != 32) // 32 = space
    {
        ab_pass[i] = *slash_ptr;
        i++;
        slash_ptr++;
    }

    ab_pass[i+1] = '\0';

    strcpy(abs_path, ab_pass);

        //array to store query
    char qu[LimitRequestLine+1];

    //pointer of ?
    char* quest_ptr = strchr(line, '?');

    if(quest_ptr == NULL)
        qu[0] = '\0';
     else
     {
        quest_ptr++; // one character forward
         if(*quest_ptr == 32) //32 space
             qu[0] = '\0';
         else
         {
            int index = 0;
            char* quest_e_ptr = strstr(line, "q=");
            if(quest_e_ptr != NULL)
            {
                while(*quest_e_ptr != 32) // 32 space
                {
                    qu[index] = *quest_e_ptr;
                    quest_e_ptr++;
                    index++;
                }
                qu[index+1] = '\0';
            }
         }
     }

    strcpy(query, qu);

    return true;
}