anjuta-serializer.c 8.73 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
/*
 *  anjuta-serializer.c
 *  Copyright (C) 2000 Naba Kumar  <naba@gnome.org>
 * 
 *  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 Library 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
18
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19
 */
20 21 22 23 24 25 26 27 28 29

/**
 * SECTION:anjuta-serializer
 * @short_description: Data serializer
 * @see_also: 
 * @stability: Unstable
 * @include: libanjuta/anjuta-serializer.h
 * 
 */

30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
#include <stdio.h>
#include <anjuta-enum-types.h>
#include "anjuta-serializer.h"
 
static void anjuta_serializer_class_init(AnjutaSerializerClass *klass);
static void anjuta_serializer_init(AnjutaSerializer *sp);
static void anjuta_serializer_finalize(GObject *object);

struct _AnjutaSerializerPrivate {
	AnjutaSerializerMode mode;
	gchar *filepath;
	FILE *stream;
};

static GObjectClass *parent_class = NULL;

enum
{
	PROP_0,
	PROP_FILEPATH,
	PROP_MODE
};

GType
anjuta_serializer_get_type (void)
{
	static GType type = 0;

	if(type == 0) {
		static const GTypeInfo our_info = {
			sizeof (AnjutaSerializerClass),
			NULL,
			NULL,
			(GClassInitFunc)anjuta_serializer_class_init,
			NULL,
			NULL,
			sizeof (AnjutaSerializer),
			0,
			(GInstanceInitFunc)anjuta_serializer_init,
		};

		type = g_type_register_static(G_TYPE_OBJECT,
									  "AnjutaSerializer", &our_info, 0);
	}

	return type;
}

static void
anjuta_serializer_set_property (GObject * object,
								guint property_id,
								const GValue * value, GParamSpec * pspec)
{
	AnjutaSerializer *self = ANJUTA_SERIALIZER (object);
	g_return_if_fail (value != NULL);
	g_return_if_fail (pspec != NULL);
	
	switch (property_id)
	{
	case PROP_MODE:
		self->priv->mode = g_value_get_enum (value);
		break;
	case PROP_FILEPATH:
		g_free (self->priv->filepath);
		self->priv->filepath = g_value_dup_string (value);
		if (self->priv->stream)
			fclose (self->priv->stream);
		if (self->priv->mode == ANJUTA_SERIALIZER_READ)
			self->priv->stream = fopen (self->priv->filepath, "r");
		else
			self->priv->stream = fopen (self->priv->filepath, "w");
		if (self->priv->stream == NULL)
		{
103
			/*
104 105
			g_warning ("Could not open %s for serialization: %s",
					   self->priv->filepath, g_strerror (errno));
106
			*/
107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272
		}
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	}
}

static void
anjuta_serializer_get_property (GObject * object,
								guint property_id,
								GValue * value, GParamSpec * pspec)
{
	AnjutaSerializer *self = ANJUTA_SERIALIZER (object);
	
	g_return_if_fail(value != NULL);
	g_return_if_fail(pspec != NULL);
	
	switch (property_id)
	{
	case PROP_MODE:
		g_value_set_enum (value, self->priv->mode);
		break;
	case PROP_FILEPATH:
		g_value_set_string (value, self->priv->filepath);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
	}
}

static void
anjuta_serializer_class_init (AnjutaSerializerClass *klass)
{
	GObjectClass *object_class = G_OBJECT_CLASS(klass);

	parent_class = g_type_class_peek_parent(klass);
	object_class->finalize = anjuta_serializer_finalize;
	object_class->set_property = anjuta_serializer_set_property;
	object_class->get_property = anjuta_serializer_get_property;
	
	g_object_class_install_property (object_class,
			 PROP_FILEPATH,
			 g_param_spec_string ("filepath",
					 "File path",
					 "Used to store and retrieve the stream"
					 "translateable",
					 NULL,
					 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
	g_object_class_install_property (object_class,
			 PROP_MODE,
			 g_param_spec_enum ("mode",
					 "Serialization mode",
					 "Used to decide read or write operation",
					 ANJUTA_TYPE_SERIALIZER_MODE,
					 ANJUTA_SERIALIZER_READ,
					 G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
}

static void
anjuta_serializer_init (AnjutaSerializer *obj)
{
	obj->priv = g_new0 (AnjutaSerializerPrivate, 1);
}

static void
anjuta_serializer_finalize (GObject *object)
{
	AnjutaSerializer *cobj;
	cobj = ANJUTA_SERIALIZER(object);
	
	g_free (cobj->priv->filepath);
	if (cobj->priv->stream)
		fclose (cobj->priv->stream);
	g_free (cobj->priv);
	G_OBJECT_CLASS (parent_class)->finalize (object);
}

AnjutaSerializer *
anjuta_serializer_new (const gchar *filepath, AnjutaSerializerMode mode)
{
	AnjutaSerializer *obj;
	
	obj = ANJUTA_SERIALIZER (g_object_new (ANJUTA_TYPE_SERIALIZER,
										   "mode", mode,
										   "filepath", filepath, NULL));
	if (obj->priv->stream == NULL)
	{
		g_object_unref (obj);
		return NULL;
	}
	return obj;
}

static gboolean
anjuta_serializer_write_buffer (AnjutaSerializer *serializer,
								const gchar *name, const gchar *value)
{
	gint length;
	gchar *buffer;
	
	g_return_val_if_fail (ANJUTA_IS_SERIALIZER (serializer), FALSE);
	g_return_val_if_fail (serializer->priv->stream != NULL, FALSE);
	g_return_val_if_fail (serializer->priv->mode == ANJUTA_SERIALIZER_WRITE,
						  FALSE);
	g_return_val_if_fail (name != NULL, FALSE);
	g_return_val_if_fail (value != NULL, FALSE);
	
	buffer = g_strconcat (name, ": ", value, NULL);
	length = strlen (buffer);
	if (fprintf (serializer->priv->stream, "%d\n", length) < 1)
	{
		g_free (buffer);
		return FALSE;
	}
	if (fwrite (buffer, length, 1, serializer->priv->stream) < 1)
	{
		g_free (buffer);
		return FALSE;
	}
	if (fprintf (serializer->priv->stream, "\n") < 0)
	{
		g_free (buffer);
		return FALSE;
	}
	g_free (buffer);
	return TRUE;
}

static gboolean
anjuta_serializer_read_buffer (AnjutaSerializer *serializer,
							   const gchar *name, gchar **value)
{
	gint length;
	gchar *buffer;
	
	g_return_val_if_fail (ANJUTA_IS_SERIALIZER (serializer), FALSE);
	g_return_val_if_fail (serializer->priv->stream != NULL, FALSE);
	g_return_val_if_fail (serializer->priv->mode == ANJUTA_SERIALIZER_READ,
						  FALSE);
	g_return_val_if_fail (name != NULL, FALSE);
	g_return_val_if_fail (value != NULL, FALSE);
	
	if (fscanf (serializer->priv->stream, "%d\n", &length) < 1)
		return FALSE;
	
	buffer = g_new0 (gchar, length + 1);
	if (fread (buffer, length, 1, serializer->priv->stream) < 1)
	{
		g_free (buffer);
		return FALSE;
	}
	if (fscanf (serializer->priv->stream, "\n") < 0)
	{
		g_free (buffer);
		return FALSE;
	}
	if (strncmp (buffer, name, strlen (name)) !=  0)
	{
		g_free (buffer);
		return FALSE;
	}		
	if (strncmp (buffer + strlen (name), ": ", 2) !=  0)
	{
		g_free (buffer);
		return FALSE;
	}
273
	/* Is it dangerous to use the same buffer to shift the text up? */
274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361
	strcpy (buffer, buffer + strlen (name) + 2);
	*value = buffer;
	
	return TRUE;
}

gboolean
anjuta_serializer_write_int (AnjutaSerializer *serializer,
							 const gchar *name, gint value)
{
	gchar buffer[64];
	snprintf (buffer, 64, "%d", value);
	return anjuta_serializer_write_buffer (serializer, name, buffer);
}

gboolean
anjuta_serializer_write_float (AnjutaSerializer *serializer,
							   const gchar *name, gfloat value)
{
	gchar buffer[64];
	snprintf (buffer, 64, "%f", value);
	return anjuta_serializer_write_buffer (serializer, name, buffer);
}

gboolean
anjuta_serializer_write_string (AnjutaSerializer *serializer,
								const gchar *name, const gchar *value)
{
	if (value)
		return anjuta_serializer_write_buffer (serializer, name, value);
	else
		return anjuta_serializer_write_buffer (serializer, name, "(null)");
}

gboolean
anjuta_serializer_read_int (AnjutaSerializer *serializer,
							 const gchar *name, gint *value)
{
	gchar *buffer;

	g_return_val_if_fail (value != NULL, FALSE);

	if (!anjuta_serializer_read_buffer (serializer, name, &buffer))
		return FALSE;
	*value = atoi (buffer);
	g_free (buffer);
	return TRUE;
}

gboolean
anjuta_serializer_read_float (AnjutaSerializer *serializer,
							  const gchar *name, gfloat *value)
{
	gchar *buffer;
	
	g_return_val_if_fail (value != NULL, FALSE);
	
	if (!anjuta_serializer_read_buffer (serializer, name, &buffer))
		return FALSE;
	*value = atof (buffer);
	g_free (buffer);
	return TRUE;
}

gboolean
anjuta_serializer_read_string (AnjutaSerializer *serializer,
							   const gchar *name, gchar **value,
							   gboolean replace)
{
	gchar *buffer;
	
	g_return_val_if_fail (value != NULL, FALSE);
	
	if (!anjuta_serializer_read_buffer (serializer, name, &buffer))
		return FALSE;
	if (replace)
		g_free (*value);
	if (strcmp (buffer, "(null)") == 0)
	{
		g_free (buffer);
		*value = NULL;
	}
	else
	{
		*value = buffer;
	}
	return TRUE;
}