heraia_io.c

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00001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
00002 /*
00003   heraia_io.c
00004   heraia_io.c - input and output functions for heraia
00005 
00006   (C) Copyright 2005 - 2010 Olivier Delhomme
00007   e-mail : heraia@delhomme.org
00008   URL    : http://heraia.tuxfamily.org
00009 
00010   This program is free software; you can redistribute it and/or modify
00011   it under the terms of the GNU General Public License as published by
00012   the Free Software Foundation; either version 2, or  (at your option)
00013   any later version.
00014 
00015   This program is distributed in the hope that it will be useful,
00016   but WITHOUT ANY WARRANTY;  without even the implied warranty of
00017   MERCHANTABILITY  or  FITNESS FOR A PARTICULAR PURPOSE.  See the
00018   GNU General Public License for more details.
00019 
00020   You should have received a copy of the GNU General Public License
00021   along with this program; if not, write to the Free Software
00022   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
00023 /**
00024  * @file heraia_io.c
00025  * Here I want to see everything that deals with I/O, files, disk and so on.
00026  */
00027 #include <libheraia.h>
00028 
00029 static GtkBuilder *load_xml_if_it_exists(char *file_to_load);
00030 
00031 
00032 /**
00033  *  Loads the file 'filename' to analyse and populates the
00034  *  corresponfing structure 'main_struct' as needed thus
00035  *  main_struct and filename must NOT be NULL pointers
00036  * @param main_struct : main structure (it must not be NULL)
00037  * @param filename : filename of the file to load (it must not be NULL)
00038  * @return TRUE if everything went ok, FALSE otherwise
00039  */
00040 gboolean load_file_to_analyse(heraia_struct_t *main_struct, gchar *filename)
00041 {
00042     struct stat *stat_buf = NULL;
00043     gboolean success = FALSE;
00044     doc_t* doc = NULL;
00045 
00046     g_return_val_if_fail(filename != NULL, FALSE);
00047     g_return_val_if_fail(main_struct != NULL, FALSE);
00048 
00049     stat_buf = (struct stat *) g_malloc0 (sizeof(struct stat));
00050     stat(filename, stat_buf);
00051 
00052     log_message(main_struct, G_LOG_LEVEL_DEBUG, "filename to load : %s", filename);
00053 
00054     if (S_ISREG(stat_buf->st_mode) && stat_buf->st_size>0)
00055         {
00056 
00057             doc = heraia_hex_document_new(main_struct, filename); /* removes the old hexdocument and adds a new one */
00058 
00059             if (doc != NULL)
00060                 {
00061                     add_new_tab_in_main_struct(main_struct, doc);
00062 
00063                     log_message(main_struct, G_LOG_LEVEL_DEBUG, "Hexwidget : %p", doc->hex_widget);
00064 
00065                     success = TRUE;
00066 
00067                     /* updating the window name and tab's name */
00068                     update_main_struct_name(main_struct);
00069                     set_notebook_tab_name(main_struct);
00070 
00071                     /* Showing all the widgets */
00072                     grey_main_widgets(main_struct->xmls->main, FALSE);
00073 
00074                     log_message(main_struct, G_LOG_LEVEL_DEBUG, "file %s loaded !", filename);
00075                 }
00076             else
00077                 {
00078                     log_message(main_struct, G_LOG_LEVEL_ERROR, "Error while trying to load file %s", filename);
00079                     success = FALSE;
00080                 }
00081 
00082         }
00083     else
00084         {
00085             if (S_ISREG(stat_buf->st_mode))
00086                 {
00087                     log_message(main_struct, G_LOG_LEVEL_WARNING, "The file %s is empty !", filename);
00088                 }
00089             else
00090                 {
00091                     log_message(main_struct, G_LOG_LEVEL_WARNING, "The file %s does not exist !", filename);
00092                 }
00093             success = FALSE;
00094         }
00095 
00096     g_free(stat_buf);
00097 
00098     return success;
00099 }
00100 
00101 
00102 /**
00103  * @fn GtkBuilder *load_xml_if_it_exists(gchar *file_to_load)
00104  *  Checks if file_to_load exists and is valid and if possible, loads it
00105  *  in the xml structure
00106  * @param file_to_load : a filename of a possibly existing GtkBuilder file
00107  * @return returns the GtkBuilder XML structure if any, NULL otherwise
00108  */
00109 static GtkBuilder *load_xml_if_it_exists(gchar *file_to_load)
00110 {
00111     struct stat *stat_buf;
00112     GtkBuilder *xml = NULL;
00113 
00114     stat_buf = (struct stat *) g_malloc0 (sizeof(struct stat));
00115 
00116     stat(file_to_load, stat_buf);
00117     if (S_ISREG(stat_buf->st_mode) && stat_buf->st_size>0)
00118         {
00119             GError* error = NULL;
00120             xml = gtk_builder_new ();
00121 
00122             if (!gtk_builder_add_from_file(xml, file_to_load, &error))
00123                 {
00124                     g_warning ("Couldn't load builder file: %s", error->message);
00125                     g_error_free (error);
00126                 }
00127         }
00128     else
00129         {
00130             xml = NULL;
00131         }
00132 
00133     g_free(stat_buf);
00134 
00135     return xml;
00136 }
00137 
00138 
00139 /**
00140  * @fn GtkBuilder *load_xml_file(GList *location_list, gchar *filename)
00141  *  loads the GtkBuilder xml file ('filename') that describes an interface,
00142  *  tries all the paths defined in the location_list and put the definition
00143  *  in the 'xml' variable. A frontend to load_xml_if_it_exists function
00144  * @param location_list : a Glist containing paths where we might found the file
00145  * @param filename : GtkBuilder filename that we want to load (possibly)
00146  * @return returns the GtkBuilder XML structure if any, NULL otherwise
00147  */
00148 GtkBuilder *load_xml_file(GList *location_list, gchar *filename)
00149 {
00150     gchar *file_to_load = NULL;
00151     GList *list = g_list_first(location_list);
00152     GtkBuilder *xml = NULL;
00153 
00154     while (list != NULL && xml == NULL)
00155         {
00156             file_to_load =  g_build_filename((gchar *) list->data, filename, NULL);
00157 
00158             xml = load_xml_if_it_exists(file_to_load);
00159 
00160             if (xml == NULL)
00161                 {
00162                     list = list->next;
00163                 }
00164             g_free(file_to_load);
00165         }
00166 
00167     return xml;
00168 }
00169 
00170 
00171 /**
00172  * @fn gboolean load_preference_file(heraia_struct_t *main_struct)
00173  *  Load the preference file
00174  * @param main_struct : main structure
00175  * @return TRUE if everything went ok, FALSE otherwise
00176  */
00177 gboolean load_preference_file(heraia_struct_t *main_struct)
00178 {
00179     if (main_struct != NULL && main_struct->prefs != NULL)
00180         {
00181             return g_key_file_load_from_file(main_struct->prefs->file, main_struct->prefs->filename,  G_KEY_FILE_KEEP_COMMENTS & G_KEY_FILE_KEEP_TRANSLATIONS, NULL);
00182         }
00183     else
00184         {
00185             return FALSE;
00186         }
00187 }
00188 
00189 
00190 /**
00191  * @fn gboolean save_preferences_to_file(prefs_t *prefs)
00192  *  Saves the preferences to the file preferences
00193  * @param prefs : preferences (from prefs_t structure)
00194  * @return TRUE if everything went ok, FALSE otherwise
00195  */
00196 gboolean save_preferences_to_file(prefs_t *prefs)
00197 {
00198     gsize length = 0;
00199     gchar *contents = NULL;
00200     gboolean result = FALSE;
00201 
00202     if (prefs != NULL && prefs->file != NULL && prefs->filename != NULL)
00203         {
00204             contents = g_key_file_to_data(prefs->file, &length, NULL);
00205             result = g_file_set_contents(prefs->filename, contents, length, NULL);
00206             g_free(contents);
00207         }
00208 
00209     return result;
00210 }
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