gsegyfileaux.c

segy 显示程序！希望能给正在做这部分朋友提供一部分资料

/* 
 * GTKSEISVIEWUI - Library of interface elements for GSEGYView
 *
 * Copyright (C) 2005-2006 Vladimir Bashkardin
 *
 * 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; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that 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 av.
 *
 * 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.
 *
 * Author:  Vladimir Bashkardin  <[e-mail]>
 */

#include "gsegyfileaux.h"

static gchar *gsegy_error_messages[G_SEGY_FILE_MESSAGES_NUM] = { NULL, NULL, NULL, NULL, NULL, NULL,
                                                                 NULL, NULL, NULL, NULL, NULL, NULL };

static void gsegy_view_init_file_error_messages (void) {
     gsegy_error_messages[G_SEGY_FILE_NO_ERROR] = _("No error");
     gsegy_error_messages[G_SEGY_FILE_MEMORY_ALLOCATION_FAIL] = _("Not enough memory for data to load");
     gsegy_error_messages[G_SEGY_FILE_OPEN_ERROR] = _("File open error");
     gsegy_error_messages[G_SEGY_FILE_DOES_NOT_EXIST] = _("File does not exist");
     gsegy_error_messages[G_SEGY_FILE_NON_REGULAR] = _("Non regular file");
     gsegy_error_messages[G_SEGY_FILE_UNKNOW_SAMPLE_ID] = _("Unknown sample ID in the file header");
     gsegy_error_messages[G_SEGY_FILE_ZERO_NUMBER_OF_SAMPLES] = _("Number of samples is zero in the file header");
     gsegy_error_messages[G_SEGY_FILE_ZERO_SAMPLE_INTERVAL] = _("Sample interval is zero in the file header");
     gsegy_error_messages[G_SEGY_FILE_READ_ERROR] = _("File read error");
     gsegy_error_messages[G_SEGY_FILE_PREMATURE_EOF] = _("Premature end of file");
     gsegy_error_messages[G_SEGY_FILE_FORMAT_ALREADY_SET] = _("File format is already set");
     gsegy_error_messages[G_SEGY_FILE_INTERRUPTED_BY_USER] = _("File operation is interrupted by user");
}

const gchar *gsegy_view_get_file_error_message (GSEGYFileError *file_error) {
     if (NULL == gsegy_error_messages[0])
         gsegy_view_init_file_error_messages ();

     return gsegy_error_messages[file_error->id];
}

static gchar *gsegy_view_base_dir = NULL;

void gsegy_view_init_dirs (int argc, char *argv[]) {
    if (NULL == gsegy_view_base_dir && argc && argv && argv[0]) {
        gchar *base_dir = g_path_get_dirname (argv[0]);
        if (FALSE == g_path_is_absolute (base_dir)) {
            gchar *current_dir = g_get_current_dir ();
#ifdef WIN32
            gsegy_view_base_dir = g_strconcat (current_dir, "\\", base_dir, NULL);
#else
            gsegy_view_base_dir = g_strconcat (current_dir, "/", base_dir, NULL);
#endif
            g_free (current_dir);
            g_free (base_dir);
        } else
            gsegy_view_base_dir = base_dir;
    }
#ifdef DEBUG
    g_printf ("Base dir is %s\n", gsegy_view_base_dir);
#endif
}

static GdkPixbuf *gsegy_view_icon = NULL;

void gsegy_view_set_window_icon (GtkWindow *window) {
    if (NULL == gsegy_view_icon) {
#ifdef WIN32
        gchar *icon_filename = g_strconcat (gsegy_view_get_data_dir (), "\\pixmaps\\",
                                            PACKAGE_NAME, ".png", NULL);
#else
        gchar *icon_filename = g_strconcat (gsegy_view_get_data_dir (), "/pixmaps/",
                                            PACKAGE_NAME, ".png", NULL);
#endif
#ifdef DEBUG
        g_printf ("Icon filename: %s\n", icon_filename);
#endif
        if (g_file_test (icon_filename, G_FILE_TEST_IS_REGULAR) &&
            g_file_test (icon_filename, G_FILE_TEST_EXISTS)) {
            GError *gerror = NULL;
            gsegy_view_icon = gdk_pixbuf_new_from_file (icon_filename, &gerror);
            if (gerror) {
#ifdef DEBUG
                g_printf ("%s\n", gerror->message);
#endif
                g_error_free (gerror);
                g_free (icon_filename);
                return;
            }
        } else {
#ifdef DEBUG
            g_printf ("Icon file does not exist or not accessible\n");
#endif
            g_free (icon_filename);
            return;
        }
        g_free (icon_filename);
    }

    if (window)
        gtk_window_set_icon (window, gsegy_view_icon);
}

static gchar *gsegy_view_data_dir = NULL;

const gchar *gsegy_view_get_data_dir (void) {
    if (NULL == gsegy_view_data_dir) {
#ifdef WIN32
        gsegy_view_data_dir = g_strdup (gsegy_view_base_dir);
#else
        gsegy_view_data_dir = g_strdup (DATA_DIR);
#endif
    }
    return gsegy_view_data_dir;
}

static gchar *gsegy_view_locale_dir = NULL;

const gchar *gsegy_view_get_locale_dir (void) {
    if (NULL == gsegy_view_locale_dir) {
#ifdef WIN32
        gsegy_view_locale_dir = g_strconcat (gsegy_view_base_dir, "\\locale", NULL);
#else
        gsegy_view_locale_dir = g_strdup (PACKAGE_LOCALE_DIR);
#endif
    }
    return gsegy_view_locale_dir;
}