openjpeg/src/lib/openjp2/event.c

/*
 * The copyright in this software is being made available under the 2-clauses
 * BSD License, included below. This software may be subject to other third
 * party and contributor rights, including patent rights, and no such rights
 * are granted under this license.
 *
 * Copyright (c) 2005, Herve Drolon, FreeImage Team
 * Copyright (c) 2008, 2011-2012, Centre National d'Etudes Spatiales (CNES), FR
 * Copyright (c) 2012, CS Systemes d'Information, France
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include "opj_includes.h"

/* ==========================================================
     Utility functions
   ==========================================================*/

#ifdef OPJ_CODE_NOT_USED
#ifndef _WIN32
static char*
i2a(unsigned i, char *a, unsigned r)
{
    if (i / r > 0) {
        a = i2a(i / r, a, r);
    }
    *a = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"[i % r];
    return a + 1;
}

/**
 Transforms integer i into an ascii string and stores the result in a;
 string is encoded in the base indicated by r.
 @param i Number to be converted
 @param a String result
 @param r Base of value; must be in the range 2 - 36
 @return Returns a
*/
static char *
_itoa(int i, char *a, int r)
{
    r = ((r < 2) || (r > 36)) ? 10 : r;
    if (i < 0) {
        *a = '-';
        *i2a(-i, a + 1, r) = 0;
    } else {
        *i2a(i, a, r) = 0;
    }
    return a;
}

#endif /* !_WIN32 */
#endif

/* ----------------------------------------------------------------------- */
/**
 * Default callback function.
 * Do nothing.
 */
static void opj_default_callback(const char *msg, void *client_data)
{
    OPJ_ARG_NOT_USED(msg);
    OPJ_ARG_NOT_USED(client_data);
}

/* ----------------------------------------------------------------------- */


/* ----------------------------------------------------------------------- */
OPJ_BOOL opj_event_msg(opj_event_mgr_t* p_event_mgr, OPJ_INT32 event_type,
                       const char *fmt, ...)
{
#define OPJ_MSG_SIZE 512 /* 512 bytes should be more than enough for a short message */
    opj_msg_callback msg_handler = 00;
    void * l_data = 00;

    if (p_event_mgr != 00) {
        switch (event_type) {
        case EVT_ERROR:
            msg_handler = p_event_mgr->error_handler;
            l_data = p_event_mgr->m_error_data;
            break;
        case EVT_WARNING:
            msg_handler = p_event_mgr->warning_handler;
            l_data = p_event_mgr->m_warning_data;
            break;
        case EVT_INFO:
            msg_handler = p_event_mgr->info_handler;
            l_data = p_event_mgr->m_info_data;
            break;
        default:
            break;
        }
        if (msg_handler == 00) {
            return OPJ_FALSE;
        }
    } else {
        return OPJ_FALSE;
    }

    if ((fmt != 00) && (p_event_mgr != 00)) {
        va_list arg;
        char message[OPJ_MSG_SIZE];
        memset(message, 0, OPJ_MSG_SIZE);
        /* initialize the optional parameter list */
        va_start(arg, fmt);
        /* parse the format string and put the result in 'message' */
        vsnprintf(message, OPJ_MSG_SIZE, fmt, arg);
        /* force zero termination for Windows _vsnprintf() of old MSVC */
        message[OPJ_MSG_SIZE - 1] = '\0';
        /* deinitialize the optional parameter list */
        va_end(arg);

        /* output the message to the user program */
        msg_handler(message, l_data);
    }

    return OPJ_TRUE;
}

void opj_set_default_event_handler(opj_event_mgr_t * p_manager)
{
    p_manager->m_error_data = 00;
    p_manager->m_warning_data = 00;
    p_manager->m_info_data = 00;
    p_manager->error_handler = opj_default_callback;
    p_manager->info_handler = opj_default_callback;
    p_manager->warning_handler = opj_default_callback;
}