sqlite3/common.cpp

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//
// Copyright (C) 2004-2006 Maciej Sobczak, Stephen Hutton
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//

#include <soci-platform.h>
#include "common.h"
#include "soci-backend.h"
// std
#include <cstdlib>
#include <ctime>


namespace // anonymous
{

// helper function for parsing decimal data (for std::tm)
long parse10(char const *&p1, char *&p2, char const* const msg)
{
    long v = std::strtol(p1, &p2, 10);
    if (p2 != p1)
    {
        p1 = p2 + 1;
        return v;
    }
    else
    {
        throw soci::soci_error(msg);
    }
}

} // namespace anonymous


void soci::details::sqlite3::parse_std_tm(char const *buf, std::tm &t)
{
    char const *p1 = buf;
    char *p2 = 0;

    char const* const errMsg = "Cannot convert data to std::tm.";

    long year  = parse10(p1, p2, errMsg);
    long month = parse10(p1, p2, errMsg);
    long day   = parse10(p1, p2, errMsg);

    long hour = 0, minute = 0, second = 0;
    if (*p2 != '\0')
    {
        // there is also the time of day available
        hour   = parse10(p1, p2, errMsg);
        minute = parse10(p1, p2, errMsg);
        second = parse10(p1, p2, errMsg);
    }

    t.tm_isdst = -1;
    t.tm_year = year - 1900;
    t.tm_mon  = month - 1;
    t.tm_mday = day;
    t.tm_hour = hour;
    t.tm_min  = minute;
    t.tm_sec  = second;

    std::mktime(&t);
}