[C++] Auto Block Chat System

//1.) Search for:
extern int g_nPortalLimitTime;
//2.) Add after:
#include <boost/format.hpp>
#define AUTO_BLOCK_CHAT_TIME 60
#define AUTO_BLOCK_CHAT_FILE "locale/country/banword.txt"

//1.) Search for:
    if (true == SpamBlockCheck(ch, buf, buflen))
    {
        return iExtraLen;
    }
//2.) Add after:
    // START OF AUTO BLOCK CHAT //
    std::string c_pszContent(buf);
    std::string c_pszCommand = str(boost::format("%s %d") % ch->GetName() % AUTO_BLOCK_CHAT_TIME);
    std::string c_pszDelimiter = ",";

    FILE *fp = fopen(AUTO_BLOCK_CHAT_FILE, "r");
    if (!fp)
    {
        sys_err("Cannot open %s", AUTO_BLOCK_CHAT_FILE);
        return iExtraLen;
    }

    char szLine[1024];
    fscanf(fp, "%[^\n]", szLine);
    std::string c_pszString(szLine);

    size_t pos = 0;
    std::string token;
    while ((pos = c_pszString.find(c_pszDelimiter)) != std::string::npos)
    {
        token = c_pszString.substr(0, pos);
        c_pszString.erase(0, pos + c_pszDelimiter.length());
        std::size_t position = c_pszContent.find(token);

        if (position != std::string::npos)
        {
            if (!ch->FindAffect(AFFECT_BLOCK_CHAT))
            {
                char buf[256];
                snprintf(buf, sizeof(buf), "Player %s has been blocked chat for %d seconds.", ch->GetName(), AUTO_BLOCK_CHAT_TIME);
                SendNotice(buf);
                interpret_command(NULL, "block_chat", 10);
            }
        }
    }
    fclose(fp);
    // END OF AUTO BLOCK CHAT //