Make file handling more general so it can be reused.

The log file handling stuff will be useful for saving eeprom data, so pull
it out of the real-time log handling code and make a general interface.

Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 230 insertions, 0 deletions

diff --git a/aoview/aoview_file.c b/aoview/aoview_file.c
new file mode 100644
index 00000000..d86d5878
--- /dev/null
+++ b/aoview/aoview_file.c
@@ -0,0 +1,230 @@
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * 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; version 2 of the License.
+ *
+ * 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 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 "aoview.h"
+
+static char *aoview_file_dir;
+
+#define ALTOS_DIR_PATH	"/apps/aoview/log_dir"
+#define DEFAULT_DIR	"AltOS"
+
+struct aoview_file {
+	char	*ext;
+	FILE	*file;
+	char	*name;
+	int	failed;
+	int	serial;
+	int	sequence;
+};
+
+static void
+aoview_file_save_conf(void)
+{
+	GConfClient	*gconf_client;
+
+	gconf_client = gconf_client_get_default();
+	if (gconf_client)
+	{
+		gconf_client_set_string(gconf_client,
+					ALTOS_DIR_PATH,
+					aoview_file_dir,
+					NULL);
+		g_object_unref(G_OBJECT(gconf_client));
+	}
+}
+
+static void
+aoview_file_configure(GtkWidget *widget, gpointer data)
+{
+	GtkFileChooser *chooser = data;
+	aoview_file_dir = gtk_file_chooser_get_filename(chooser);
+	aoview_file_save_conf();
+	gtk_widget_hide(GTK_WIDGET(chooser));
+}
+
+void
+aoview_file_finish(struct aoview_file *file)
+{
+	if (file->file) {
+		fclose(file->file);
+		file->file = NULL;
+		free(file->name);
+		file->name = NULL;
+	}
+	file->failed = 0;
+}
+
+static GtkMessageDialog *file_fail_dialog;
+
+static void
+aoview_file_open_failed(char *name)
+{
+	char	*utf8_file;
+	utf8_file = g_filename_to_utf8(name, -1, NULL, NULL, NULL);
+	if (!utf8_file)
+		utf8_file = name;
+	gtk_message_dialog_format_secondary_text(file_fail_dialog,
+						 "\"%s\"", utf8_file);
+	if (utf8_file != name)
+		g_free(utf8_file);
+	gtk_widget_show(GTK_WIDGET(file_fail_dialog));
+}
+
+gboolean
+aoview_file_start(struct aoview_file *file)
+{
+	char		base[50];
+	struct tm	tm;
+	time_t		now;
+	char		*full;
+	int		r;
+
+	if (file->file)
+		return TRUE;
+
+	if (file->failed)
+		return FALSE;
+
+	now = time(NULL);
+	(void) localtime_r(&now, &tm);
+	aoview_mkdir(aoview_file_dir);
+	for (;;) {
+		snprintf(base, sizeof (base), "%04d-%02d-%02d-serial-%03d-flight-%03d.%s",
+			tm.tm_year + 1900,
+			tm.tm_mon + 1,
+			tm.tm_mday,
+			file->serial,
+			file->sequence,
+			file->ext);
+		full = aoview_fullname(aoview_file_dir, base);
+		r = access(full, F_OK);
+		if (r < 0) {
+			file->file = fopen(full, "w");
+			if (!file->file) {
+				aoview_file_open_failed(full);
+				free(full);
+				file->failed = 1;
+				return FALSE;
+			} else {
+				setlinebuf(file->file);
+				file->name = full;
+				return TRUE;
+			}
+		}
+		free(full);
+		file->sequence++;
+	}
+}
+
+void
+aoview_file_vprintf(struct aoview_file *file, char *format, va_list ap)
+{
+	if (!aoview_file_start(file))
+		return;
+	vfprintf(file->file, format, ap);
+}
+
+void
+aoview_file_printf(struct aoview_file *file, char *format, ...)
+{
+	va_list	ap;
+
+	va_start(ap, format);
+	aoview_file_vprintf(file, format, ap);
+	va_end(ap);
+}
+
+struct aoview_file *
+aoview_file_new(char *ext)
+{
+	struct aoview_file	*file;
+
+	file = calloc (1, sizeof (struct aoview_file));
+	if (!file)
+		return NULL;
+	file->ext = strdup(ext);
+	if (!file->ext) {
+		free(file);
+		return NULL;
+	}
+	return file;
+}
+
+void
+aoview_file_destroy(struct aoview_file *file)
+{
+	if (file->file)
+		fclose(file->file);
+	if (file->name)
+		free(file->name);
+	free(file->ext);
+	free(file);
+}
+
+void
+aoview_file_set_serial(struct aoview_file *file, int serial)
+{
+	if (serial != file->serial)
+		aoview_file_finish(file);
+	file->serial = serial;
+}
+
+int
+aoview_file_get_serial(struct aoview_file *file)
+{
+	return file->serial;
+}
+
+void
+aoview_file_init(GladeXML *xml)
+{
+	GConfClient	*gconf_client;
+	char		*file_dir = NULL;
+	GtkFileChooser	*file_chooser_dialog;
+	GtkWidget	*file_configure_ok;
+
+	g_type_init();
+	gconf_client = gconf_client_get_default();
+	if (gconf_client)
+	{
+		file_dir = gconf_client_get_string(gconf_client,
+						   ALTOS_DIR_PATH,
+						   NULL);
+		g_object_unref(G_OBJECT(gconf_client));
+	}
+	if (!file_dir) {
+		aoview_file_dir = aoview_fullname(getenv("HOME"), DEFAULT_DIR);
+		aoview_file_save_conf();
+	} else {
+		aoview_file_dir = strdup(file_dir);
+	}
+
+	file_chooser_dialog = GTK_FILE_CHOOSER(glade_xml_get_widget(xml, "file_chooser_dialog"));
+	assert(file_chooser_dialog);
+	gtk_file_chooser_set_filename(file_chooser_dialog, aoview_file_dir);
+
+	file_configure_ok = glade_xml_get_widget(xml, "file_configure_ok");
+	assert(file_configure_ok);
+
+	g_signal_connect(G_OBJECT(file_configure_ok), "clicked",
+			 G_CALLBACK(aoview_file_configure),
+			 file_chooser_dialog);
+
+
+	file_fail_dialog = GTK_MESSAGE_DIALOG(glade_xml_get_widget(xml, "file_fail_dialog"));
+	assert(file_fail_dialog);
+}