/* * $Id: epr_api.c,v 1.1.1.1 2003/03/05 17:36:43 hartmut Exp $ * * Copyright (C) 2002 by Brockmann Consult (info@brockmann-consult.de) * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation. This program is distributed in the hope it will * be useful, but WITHOUT ANY WARRANTY; without even the implied warranty * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * See the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. */#include <assert.h>#include <errno.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <time.h>#include "epr_api.h"#include "epr_core.h"#include "epr_string.h"#include "epr_ptrarray.h"#include "epr_swap.h"#include "epr_dddb.h"/*********************************** API ***********************************//** * Initializes the ENVISAT product reader API.  */int epr_init_api(EPR_ELogLevel   log_level,                 EPR_FLogHandler log_handler,                 EPR_FErrHandler err_handler){    if (epr_api.init_flag) {        return e_err_none;    }    epr_clear_err();    /* Determine endian order architecture */    if (epr_is_little_endian_order()) {        epr_api.little_endian_order = TRUE;    } else if (epr_is_big_endian_order()) {        epr_api.little_endian_order = FALSE;    } else {        epr_set_err(e_err_unknown_endian_order,                     "epr_init_api: failed to determine endian order");        return epr_get_last_err_code();    }    epr_api.log_level        = log_level;    epr_api.log_handler      = log_handler;    epr_api.err_handler      = err_handler;    epr_api.last_err_code    = e_err_none;    epr_api.last_err_message = NULL;    epr_api.init_flag        = TRUE;    epr_log(e_log_info, EPR_PRODUCT_API_NAME_STR ", version " EPR_PRODUCT_API_VERSION_STR);    epr_log(e_log_info, "API successfully initialized");    if (epr_api.little_endian_order) {        epr_log(e_log_debug, "running on a little endian order architecture");    } else {        epr_log(e_log_debug, "running on a big endian order architecture");    }    return epr_get_last_err_code();}/*   Function:    epr_close_api   Access:      public API   Changelog:   2002/01/05  mp initial version *//** * Closes the ENVISAT product reader API by releasing all * resources allocated by the API. */void epr_close_api(){    epr_clear_err();    if (epr_api.init_flag) {        epr_log(e_log_info, "ENVISAT product reader API is being closed");        epr_api.last_err_code = e_err_none;        epr_free_and_null_string(&epr_api.last_err_message);        epr_api.init_flag = FALSE;    }}/*   Function:    epr_set_log_handler   Access:      public API   Changelog:   2002/01/05  nf initial version *//** * Sets the log handler for the ENVISAT API. * * @param log_handler the new log handler (function pointer), *         can be NULL, if logging shall be disabled * @return zero for success, an error code otherwise */void epr_set_log_handler(EPR_FLogHandler log_handler){    epr_api.log_handler = log_handler;}void epr_log_message(EPR_ELogLevel log_level, const char* log_message){    struct tm* ptm;    time_t millis;        time(&millis);    ptm = gmtime(&millis);    fprintf(stdout,             "%c %04d/%02d/%02d %02d:%02d:%02d - %s\n",             log_level == e_log_debug   ? 'D' :            log_level == e_log_info    ? 'I' :            log_level == e_log_warning ? 'W' :            log_level == e_log_error   ? 'E' : '?',            ptm->tm_year + 1900,            ptm->tm_mon + 1,            ptm->tm_mday,            ptm->tm_hour,            ptm->tm_min,            ptm->tm_sec,            log_message);}