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PIKApp/libpikaconfig/pikaconfig-deserialize.c

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/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis
*
* Object properties deserialization routines
* Copyright (C) 2001-2002 Sven Neumann <sven@gimp.org>
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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 Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <cairo.h>
#include <gegl.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "libpikabase/pikabase.h"
#include "libpikacolor/pikacolor.h"
#include "libpikamath/pikamath.h"
#include "pikaconfigtypes.h"
#include "pikaconfigwriter.h"
#include "pikaconfig-array.h"
#include "pikaconfig-iface.h"
#include "pikaconfig-deserialize.h"
#include "pikaconfig-params.h"
#include "pikaconfig-path.h"
#include "pikascanner.h"
#include "libpika/libpika-intl.h"
/**
* SECTION: pikaconfig-deserialize
* @title: PikaConfig-deserialize
* @short_description: Deserializing code for libpikaconfig.
*
* Deserializing code for libpikaconfig.
**/
/*
* All functions return G_TOKEN_RIGHT_PAREN on success,
* the GTokenType they would have expected but didn't get
* or G_TOKEN_NONE if they got the expected token but
* couldn't parse it.
*/
static GTokenType pika_config_deserialize_value (GValue *value,
PikaConfig *config,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_fundamental (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_enum (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_memsize (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_path (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_rgb (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_matrix2 (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_object (GValue *value,
PikaConfig *config,
GParamSpec *prop_spec,
GScanner *scanner,
gint nest_level);
static GTokenType pika_config_deserialize_value_array (GValue *value,
PikaConfig *config,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_unit (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_file_value (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_parasite_value (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_bytes (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_deserialize_any (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner);
static GTokenType pika_config_skip_unknown_property (GScanner *scanner);
static inline gboolean scanner_string_utf8_valid (GScanner *scanner,
const gchar *token_name);
static inline gboolean
scanner_string_utf8_valid (GScanner *scanner,
const gchar *token_name)
{
if (g_utf8_validate (scanner->value.v_string, -1, NULL))
return TRUE;
g_scanner_error (scanner,
_("value for token %s is not a valid UTF-8 string"),
token_name);
return FALSE;
}
/**
* pika_config_deserialize_properties:
* @config: a #PikaConfig.
* @scanner: a #GScanner.
* @nest_level: the nest level
*
* This function uses the @scanner to configure the properties of @config.
*
* Returns: %TRUE on success, %FALSE otherwise.
*
* Since: 2.4
**/
gboolean
pika_config_deserialize_properties (PikaConfig *config,
GScanner *scanner,
gint nest_level)
{
GObjectClass *klass;
GParamSpec **property_specs;
guint n_property_specs;
guint i;
guint scope_id;
guint old_scope_id;
GTokenType token;
g_return_val_if_fail (PIKA_IS_CONFIG (config), FALSE);
klass = G_OBJECT_GET_CLASS (config);
property_specs = g_object_class_list_properties (klass, &n_property_specs);
if (! property_specs)
return TRUE;
scope_id = g_type_qname (G_TYPE_FROM_INSTANCE (config));
old_scope_id = g_scanner_set_scope (scanner, scope_id);
for (i = 0; i < n_property_specs; i++)
{
GParamSpec *prop_spec = property_specs[i];
if (prop_spec->flags & PIKA_CONFIG_PARAM_SERIALIZE)
{
g_scanner_scope_add_symbol (scanner, scope_id,
prop_spec->name, prop_spec);
}
}
g_free (property_specs);
g_object_freeze_notify (G_OBJECT (config));
token = G_TOKEN_LEFT_PAREN;
while (TRUE)
{
GTokenType next = g_scanner_peek_next_token (scanner);
if (next == G_TOKEN_EOF)
break;
if (G_UNLIKELY (next != token &&
! (token == G_TOKEN_SYMBOL &&
next == G_TOKEN_IDENTIFIER)))
{
break;
}
token = g_scanner_get_next_token (scanner);
switch (token)
{
case G_TOKEN_LEFT_PAREN:
token = G_TOKEN_SYMBOL;
break;
case G_TOKEN_IDENTIFIER:
token = pika_config_skip_unknown_property (scanner);
break;
case G_TOKEN_SYMBOL:
token = pika_config_deserialize_property (config,
scanner, nest_level);
break;
case G_TOKEN_RIGHT_PAREN:
token = G_TOKEN_LEFT_PAREN;
break;
default: /* do nothing */
break;
}
}
g_scanner_set_scope (scanner, old_scope_id);
g_object_thaw_notify (G_OBJECT (config));
if (token == G_TOKEN_NONE)
return FALSE;
return pika_config_deserialize_return (scanner, token, nest_level);
}
/**
* pika_config_deserialize_property:
* @config: a #PikaConfig.
* @scanner: a #GScanner.
* @nest_level: the nest level
*
* This function deserializes a single property of @config. You
* shouldn't need to call this function directly. If possible, use
* pika_config_deserialize_properties() instead.
*
* Returns: %G_TOKEN_RIGHT_PAREN on success, otherwise the
* expected #GTokenType or %G_TOKEN_NONE if the expected token was
* found but couldn't be parsed.
*
* Since: 2.4
**/
GTokenType
pika_config_deserialize_property (PikaConfig *config,
GScanner *scanner,
gint nest_level)
{
PikaConfigInterface *config_iface = NULL;
PikaConfigInterface *parent_iface = NULL;
GParamSpec *prop_spec;
GTokenType token = G_TOKEN_RIGHT_PAREN;
GValue value = G_VALUE_INIT;
guint old_scope_id;
old_scope_id = g_scanner_set_scope (scanner, 0);
prop_spec = G_PARAM_SPEC (scanner->value.v_symbol);
g_value_init (&value, prop_spec->value_type);
if (G_TYPE_IS_OBJECT (prop_spec->owner_type))
{
GTypeClass *owner_class = g_type_class_peek (prop_spec->owner_type);
config_iface = g_type_interface_peek (owner_class, PIKA_TYPE_CONFIG);
/* We must call deserialize_property() *only* if the *exact* class
* which implements it is param_spec->owner_type's class.
*
* Therefore, we ask param_spec->owner_type's immediate parent class
* for it's PikaConfigInterface and check if we get a different
* pointer.
*
* (if the pointers are the same, param_spec->owner_type's
* PikaConfigInterface is inherited from one of it's parent classes
* and thus not able to handle param_spec->owner_type's properties).
*/
if (config_iface)
{
GTypeClass *owner_parent_class;
owner_parent_class = g_type_class_peek_parent (owner_class);
parent_iface = g_type_interface_peek (owner_parent_class,
PIKA_TYPE_CONFIG);
}
}
if (config_iface &&
config_iface != parent_iface && /* see comment above */
config_iface->deserialize_property &&
config_iface->deserialize_property (config,
prop_spec->param_id,
&value,
prop_spec,
scanner,
&token))
{
/* nop */
}
else
{
if (G_VALUE_HOLDS_OBJECT (&value) &&
G_VALUE_TYPE (&value) != G_TYPE_FILE)
{
token = pika_config_deserialize_object (&value,
config, prop_spec,
scanner, nest_level);
}
else
{
token = pika_config_deserialize_value (&value,
config, prop_spec, scanner);
}
}
if (token == G_TOKEN_RIGHT_PAREN &&
g_scanner_peek_next_token (scanner) == token)
{
if (! (G_VALUE_HOLDS_OBJECT (&value) &&
(prop_spec->flags & PIKA_CONFIG_PARAM_AGGREGATE)))
g_object_set_property (G_OBJECT (config), prop_spec->name, &value);
}
#ifdef CONFIG_DEBUG
else
{
g_warning ("%s: couldn't deserialize property %s::%s of type %s",
G_STRFUNC,
g_type_name (G_TYPE_FROM_INSTANCE (config)),
prop_spec->name,
g_type_name (prop_spec->value_type));
}
#endif
g_value_unset (&value);
g_scanner_set_scope (scanner, old_scope_id);
return token;
}
static GTokenType
pika_config_deserialize_value (GValue *value,
PikaConfig *config,
GParamSpec *prop_spec,
GScanner *scanner)
{
if (G_TYPE_FUNDAMENTAL (prop_spec->value_type) == G_TYPE_ENUM)
{
return pika_config_deserialize_enum (value, prop_spec, scanner);
}
else if (G_TYPE_IS_FUNDAMENTAL (prop_spec->value_type))
{
return pika_config_deserialize_fundamental (value, prop_spec, scanner);
}
else if (prop_spec->value_type == PIKA_TYPE_MEMSIZE)
{
return pika_config_deserialize_memsize (value, prop_spec, scanner);
}
else if (prop_spec->value_type == PIKA_TYPE_CONFIG_PATH)
{
return pika_config_deserialize_path (value, prop_spec, scanner);
}
else if (prop_spec->value_type == PIKA_TYPE_RGB)
{
return pika_config_deserialize_rgb (value, prop_spec, scanner);
}
else if (prop_spec->value_type == PIKA_TYPE_MATRIX2)
{
return pika_config_deserialize_matrix2 (value, prop_spec, scanner);
}
else if (prop_spec->value_type == PIKA_TYPE_VALUE_ARRAY)
{
return pika_config_deserialize_value_array (value,
config, prop_spec, scanner);
}
else if (prop_spec->value_type == G_TYPE_STRV)
{
return pika_config_deserialize_strv (value, scanner);
}
else if (prop_spec->value_type == PIKA_TYPE_UNIT)
{
return pika_config_deserialize_unit (value, prop_spec, scanner);
}
else if (prop_spec->value_type == G_TYPE_FILE)
{
return pika_config_deserialize_file_value (value, prop_spec, scanner);
}
else if (prop_spec->value_type == PIKA_TYPE_PARASITE)
{
return pika_config_deserialize_parasite_value (value, prop_spec, scanner);
}
else if (prop_spec->value_type == G_TYPE_BYTES)
{
return pika_config_deserialize_bytes (value, prop_spec, scanner);
}
/* This fallback will only work for value_types that
* can be transformed from a string value.
*/
return pika_config_deserialize_any (value, prop_spec, scanner);
}
static GTokenType
pika_config_deserialize_fundamental (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
GTokenType token;
GTokenType next_token;
GType value_type;
gboolean negate = FALSE;
value_type = G_TYPE_FUNDAMENTAL (prop_spec->value_type);
switch (value_type)
{
case G_TYPE_STRING:
token = G_TOKEN_STRING;
break;
case G_TYPE_BOOLEAN:
token = G_TOKEN_IDENTIFIER;
break;
case G_TYPE_INT:
case G_TYPE_LONG:
case G_TYPE_INT64:
if (g_scanner_peek_next_token (scanner) == '-')
{
negate = TRUE;
g_scanner_get_next_token (scanner);
}
/* fallthrough */
case G_TYPE_UINT:
case G_TYPE_ULONG:
case G_TYPE_UINT64:
token = G_TOKEN_INT;
break;
case G_TYPE_FLOAT:
case G_TYPE_DOUBLE:
if (g_scanner_peek_next_token (scanner) == '-')
{
negate = TRUE;
g_scanner_get_next_token (scanner);
}
token = G_TOKEN_FLOAT;
break;
default:
g_assert_not_reached ();
break;
}
next_token = g_scanner_peek_next_token (scanner);
/* we parse integers into floats too, because g_ascii_dtostr()
* serialized whole number without decimal point
*/
if (next_token != token &&
! (token == G_TOKEN_FLOAT && next_token == G_TOKEN_INT))
{
return token;
}
g_scanner_get_next_token (scanner);
switch (value_type)
{
case G_TYPE_STRING:
if (scanner_string_utf8_valid (scanner, prop_spec->name))
g_value_set_string (value, scanner->value.v_string);
else
return G_TOKEN_NONE;
break;
case G_TYPE_BOOLEAN:
if (! g_ascii_strcasecmp (scanner->value.v_identifier, "yes") ||
! g_ascii_strcasecmp (scanner->value.v_identifier, "true"))
g_value_set_boolean (value, TRUE);
else if (! g_ascii_strcasecmp (scanner->value.v_identifier, "no") ||
! g_ascii_strcasecmp (scanner->value.v_identifier, "false"))
g_value_set_boolean (value, FALSE);
else
{
g_scanner_error
(scanner,
/* please don't translate 'yes' and 'no' */
_("expected 'yes' or 'no' for boolean token %s, got '%s'"),
prop_spec->name, scanner->value.v_identifier);
return G_TOKEN_NONE;
}
break;
case G_TYPE_INT:
g_value_set_int (value, (negate ?
- (gint) scanner->value.v_int64 :
(gint) scanner->value.v_int64));
break;
case G_TYPE_UINT:
g_value_set_uint (value, scanner->value.v_int64);
break;
case G_TYPE_LONG:
g_value_set_long (value, (negate ?
- (glong) scanner->value.v_int64 :
(glong) scanner->value.v_int64));
break;
case G_TYPE_ULONG:
g_value_set_ulong (value, scanner->value.v_int64);
break;
case G_TYPE_INT64:
g_value_set_int64 (value, (negate ?
- (gint64) scanner->value.v_int64 :
(gint64) scanner->value.v_int64));
break;
case G_TYPE_UINT64:
g_value_set_uint64 (value, scanner->value.v_int64);
break;
case G_TYPE_FLOAT:
if (next_token == G_TOKEN_FLOAT)
g_value_set_float (value, negate ?
- scanner->value.v_float :
scanner->value.v_float);
else
g_value_set_float (value, negate ?
- (gfloat) scanner->value.v_int :
(gfloat) scanner->value.v_int);
break;
case G_TYPE_DOUBLE:
if (next_token == G_TOKEN_FLOAT)
g_value_set_double (value, negate ?
- scanner->value.v_float:
scanner->value.v_float);
else
g_value_set_double (value, negate ?
- (gdouble) scanner->value.v_int:
(gdouble) scanner->value.v_int);
break;
default:
g_assert_not_reached ();
break;
}
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_enum (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
GEnumClass *enum_class;
GEnumValue *enum_value;
enum_class = g_type_class_peek (G_VALUE_TYPE (value));
switch (g_scanner_peek_next_token (scanner))
{
case G_TOKEN_IDENTIFIER:
g_scanner_get_next_token (scanner);
enum_value = g_enum_get_value_by_nick (enum_class,
scanner->value.v_identifier);
if (! enum_value)
enum_value = g_enum_get_value_by_name (enum_class,
scanner->value.v_identifier);
if (! enum_value)
{
/* if the value was not found, check if we have a compat
* enum to find the ideitifier
*/
GQuark quark = g_quark_from_static_string ("pika-compat-enum");
GType compat_type = (GType) g_type_get_qdata (G_VALUE_TYPE (value),
quark);
if (compat_type)
{
GEnumClass *compat_class = g_type_class_ref (compat_type);
enum_value = g_enum_get_value_by_nick (compat_class,
scanner->value.v_identifier);
if (! enum_value)
enum_value = g_enum_get_value_by_name (compat_class,
scanner->value.v_identifier);
/* finally, if we found a compat value, make sure the
* same value exists in the original enum
*/
if (enum_value)
enum_value = g_enum_get_value (enum_class, enum_value->value);
g_type_class_unref (compat_class);
}
}
if (! enum_value)
{
g_scanner_error (scanner,
_("invalid value '%s' for token %s"),
scanner->value.v_identifier, prop_spec->name);
return G_TOKEN_NONE;
}
break;
case G_TOKEN_INT:
g_scanner_get_next_token (scanner);
enum_value = g_enum_get_value (enum_class,
(gint) scanner->value.v_int64);
if (! enum_value)
{
g_scanner_error (scanner,
_("invalid value '%ld' for token %s"),
(glong) scanner->value.v_int64, prop_spec->name);
return G_TOKEN_NONE;
}
break;
default:
return G_TOKEN_IDENTIFIER;
}
g_value_set_enum (value, enum_value->value);
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_memsize (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
gchar *orig_cset_first = scanner->config->cset_identifier_first;
gchar *orig_cset_nth = scanner->config->cset_identifier_nth;
guint64 memsize;
scanner->config->cset_identifier_first = G_CSET_DIGITS;
scanner->config->cset_identifier_nth = G_CSET_DIGITS "gGmMkKbB";
if (g_scanner_peek_next_token (scanner) != G_TOKEN_IDENTIFIER)
return G_TOKEN_IDENTIFIER;
g_scanner_get_next_token (scanner);
scanner->config->cset_identifier_first = orig_cset_first;
scanner->config->cset_identifier_nth = orig_cset_nth;
if (! pika_memsize_deserialize (scanner->value.v_identifier, &memsize))
return G_TOKEN_NONE;
g_value_set_uint64 (value, memsize);
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_path (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
GError *error = NULL;
if (g_scanner_peek_next_token (scanner) != G_TOKEN_STRING)
return G_TOKEN_STRING;
g_scanner_get_next_token (scanner);
if (!scanner_string_utf8_valid (scanner, prop_spec->name))
return G_TOKEN_NONE;
if (scanner->value.v_string)
{
/* Check if the string can be expanded
* and converted to the filesystem encoding.
*/
gchar *expand = pika_config_path_expand (scanner->value.v_string,
TRUE, &error);
if (!expand)
{
g_scanner_error (scanner,
_("while parsing token '%s': %s"),
prop_spec->name, error->message);
g_error_free (error);
return G_TOKEN_NONE;
}
g_free (expand);
g_value_set_static_string (value, scanner->value.v_string);
}
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_rgb (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
PikaRGB rgb;
if (! pika_scanner_parse_color (scanner, &rgb))
return G_TOKEN_NONE;
g_value_set_boxed (value, &rgb);
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_matrix2 (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
PikaMatrix2 matrix;
if (! pika_scanner_parse_matrix2 (scanner, &matrix))
return G_TOKEN_NONE;
g_value_set_boxed (value, &matrix);
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_object (GValue *value,
PikaConfig *config,
GParamSpec *prop_spec,
GScanner *scanner,
gint nest_level)
{
PikaConfigInterface *config_iface;
PikaConfig *prop_object;
GType type;
g_object_get_property (G_OBJECT (config), prop_spec->name, value);
prop_object = g_value_get_object (value);
/* if the object property is not PIKA_CONFIG_PARAM_AGGREGATE, read
* the type of the object.
*/
if (! (prop_spec->flags & PIKA_CONFIG_PARAM_AGGREGATE))
{
gchar *type_name;
if (! pika_scanner_parse_string (scanner, &type_name))
return G_TOKEN_STRING;
if (! (type_name && *type_name))
{
g_scanner_error (scanner, "Type name is empty");
g_free (type_name);
return G_TOKEN_NONE;
}
type = g_type_from_name (type_name);
g_free (type_name);
if (! g_type_is_a (type, prop_spec->value_type))
return G_TOKEN_STRING;
}
if (! prop_object)
{
/* if the object property is not PIKA_CONFIG_PARAM_AGGREGATE,
* create the object.
*/
if (! (prop_spec->flags & PIKA_CONFIG_PARAM_AGGREGATE))
{
prop_object = g_object_new (type, NULL);
g_value_take_object (value, prop_object);
}
else
{
return G_TOKEN_RIGHT_PAREN;
}
}
config_iface = PIKA_CONFIG_GET_IFACE (prop_object);
if (! config_iface)
return pika_config_deserialize_any (value, prop_spec, scanner);
if (config_iface->deserialize_create != NULL)
{
/* Some class may prefer to create themselves their objects, for instance
* to maintain unicity of objects (in libpika in particular, the various
* PikaItem or PikaResource are managed by the lib. A single item or
* resource must be represented for a single object across the whole
* processus.
*/
PikaConfig *created_object;
created_object = config_iface->deserialize_create (G_TYPE_FROM_INSTANCE (prop_object),
scanner, nest_level + 1, NULL);
if (created_object == NULL)
return G_TOKEN_NONE;
else
g_value_take_object (value, created_object);
}
else if (! config_iface->deserialize (prop_object, scanner, nest_level + 1, NULL))
{
return G_TOKEN_NONE;
}
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_value_array (GValue *value,
PikaConfig *config,
GParamSpec *prop_spec,
GScanner *scanner)
{
PikaParamSpecValueArray *array_spec;
PikaValueArray *array;
GValue array_value = G_VALUE_INIT;
gint n_values;
GTokenType token;
gint i;
array_spec = PIKA_PARAM_SPEC_VALUE_ARRAY (prop_spec);
if (! pika_scanner_parse_int (scanner, &n_values))
return G_TOKEN_INT;
array = pika_value_array_new (n_values);
for (i = 0; i < n_values; i++)
{
g_value_init (&array_value, array_spec->element_spec->value_type);
token = pika_config_deserialize_value (&array_value,
config,
array_spec->element_spec,
scanner);
if (token == G_TOKEN_RIGHT_PAREN)
pika_value_array_append (array, &array_value);
g_value_unset (&array_value);
if (token != G_TOKEN_RIGHT_PAREN)
{
pika_value_array_unref (array);
return token;
}
}
g_value_take_boxed (value, array);
return G_TOKEN_RIGHT_PAREN;
}
/* This function is entirely sick, so is our method of serializing
* units, which we write out as (unit foo bar) instead of
* (unit "foo bar"). The assumption that caused this shit was that a
* unit's "identifier" is really an identifier in the C-ish sense,
* when in fact it's just a random user entered string.
*
* Here, we try to parse at least the default units shipped with pika,
* and we add code to parse (unit "foo bar") in order to be compatible
* with future correct unit serializing.
*/
static GTokenType
pika_config_deserialize_unit (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
gchar *old_cset_skip_characters;
gchar *old_cset_identifier_first;
gchar *old_cset_identifier_nth;
GString *buffer;
GValue src = G_VALUE_INIT;
GTokenType token;
/* parse the next token *before* reconfiguring the scanner, so it
* skips whitespace first
*/
token = g_scanner_peek_next_token (scanner);
if (token == G_TOKEN_STRING)
return pika_config_deserialize_any (value, prop_spec, scanner);
old_cset_skip_characters = scanner->config->cset_skip_characters;
old_cset_identifier_first = scanner->config->cset_identifier_first;
old_cset_identifier_nth = scanner->config->cset_identifier_nth;
scanner->config->cset_skip_characters = "";
scanner->config->cset_identifier_first = ( G_CSET_a_2_z G_CSET_A_2_Z "." );
scanner->config->cset_identifier_nth = ( G_CSET_a_2_z G_CSET_A_2_Z
G_CSET_DIGITS "-_." );
buffer = g_string_new ("");
while (g_scanner_peek_next_token (scanner) != G_TOKEN_RIGHT_PAREN)
{
token = g_scanner_peek_next_token (scanner);
if (token == G_TOKEN_IDENTIFIER)
{
g_scanner_get_next_token (scanner);
g_string_append (buffer, scanner->value.v_identifier);
}
else if (token == G_TOKEN_CHAR)
{
g_scanner_get_next_token (scanner);
g_string_append_c (buffer, scanner->value.v_char);
}
else if (token == ' ')
{
g_scanner_get_next_token (scanner);
g_string_append_c (buffer, token);
}
else
{
token = G_TOKEN_IDENTIFIER;
goto cleanup;
}
}
g_value_init (&src, G_TYPE_STRING);
g_value_set_static_string (&src, buffer->str);
g_value_transform (&src, value);
g_value_unset (&src);
token = G_TOKEN_RIGHT_PAREN;
cleanup:
g_string_free (buffer, TRUE);
scanner->config->cset_skip_characters = old_cset_skip_characters;
scanner->config->cset_identifier_first = old_cset_identifier_first;
scanner->config->cset_identifier_nth = old_cset_identifier_nth;
return token;
}
static GTokenType
pika_config_deserialize_file_value (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
GTokenType token;
token = g_scanner_peek_next_token (scanner);
if (token != G_TOKEN_IDENTIFIER &&
token != G_TOKEN_STRING)
{
return G_TOKEN_STRING;
}
g_scanner_get_next_token (scanner);
if (token == G_TOKEN_IDENTIFIER)
{
/* this is supposed to parse a literal "NULL" only, but so what... */
g_value_set_object (value, NULL);
}
else
{
gchar *path = pika_config_path_expand (scanner->value.v_string, TRUE,
NULL);
if (path)
{
GFile *file = g_file_new_for_path (path);
g_value_take_object (value, file);
g_free (path);
}
else
{
g_value_set_object (value, NULL);
}
}
return G_TOKEN_RIGHT_PAREN;
}
/*
* Note: this is different from pika_config_deserialize_parasite()
* which is a public API to deserialize random properties into a config
* object from a parasite. Here we are deserializing the contents of a
* parasite itself in @scanner.
*/
static GTokenType
pika_config_deserialize_parasite_value (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
PikaParasite *parasite;
gchar *name;
guint8 *data;
gint data_length;
gint64 flags;
if (! pika_scanner_parse_string (scanner, &name))
return G_TOKEN_STRING;
if (! (name && *name))
{
g_scanner_error (scanner, "Parasite name is empty");
g_free (name);
return G_TOKEN_NONE;
}
if (! pika_scanner_parse_int64 (scanner, &flags))
return G_TOKEN_INT;
if (! pika_scanner_parse_int (scanner, &data_length))
return G_TOKEN_INT;
if (! pika_scanner_parse_data (scanner, data_length, &data))
return G_TOKEN_STRING;
parasite = pika_parasite_new (name, flags, data_length, data);
g_value_take_boxed (value, parasite);
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_bytes (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
GTokenType token;
GBytes *bytes;
guint8 *data;
gint data_length;
token = g_scanner_peek_next_token (scanner);
if (token == G_TOKEN_IDENTIFIER)
{
g_scanner_get_next_token (scanner);
if (g_ascii_strcasecmp (scanner->value.v_identifier, "null") != 0)
/* Do not fail the whole file parsing. Just output to stderr and assume
* a NULL bytes property.
*/
g_printerr ("%s: expected NULL identifier for bytes token '%s', got '%s'. "
"Assuming NULL instead.\n",
G_STRFUNC, prop_spec->name, scanner->value.v_identifier);
g_value_set_boxed (value, NULL);
}
else if (token == G_TOKEN_INT)
{
if (! pika_scanner_parse_int (scanner, &data_length))
return G_TOKEN_INT;
if (! pika_scanner_parse_data (scanner, data_length, &data))
return G_TOKEN_STRING;
bytes = g_bytes_new (data, data_length);
g_value_take_boxed (value, bytes);
}
else
{
return G_TOKEN_INT;
}
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_deserialize_any (GValue *value,
GParamSpec *prop_spec,
GScanner *scanner)
{
GValue src = G_VALUE_INIT;
GTokenType token;
if (!g_value_type_transformable (G_TYPE_STRING, prop_spec->value_type))
{
g_scanner_error (scanner,
"%s can not be transformed from a string",
g_type_name (prop_spec->value_type));
return G_TOKEN_NONE;
}
token = g_scanner_peek_next_token (scanner);
if (token != G_TOKEN_IDENTIFIER &&
token != G_TOKEN_STRING)
{
return G_TOKEN_IDENTIFIER;
}
g_scanner_get_next_token (scanner);
g_value_init (&src, G_TYPE_STRING);
if (token == G_TOKEN_IDENTIFIER)
g_value_set_static_string (&src, scanner->value.v_identifier);
else
g_value_set_static_string (&src, scanner->value.v_string);
g_value_transform (&src, value);
g_value_unset (&src);
return G_TOKEN_RIGHT_PAREN;
}
static GTokenType
pika_config_skip_unknown_property (GScanner *scanner)
{
gint open_paren = 0;
while (TRUE)
{
GTokenType token = g_scanner_peek_next_token (scanner);
switch (token)
{
case G_TOKEN_LEFT_PAREN:
open_paren++;
g_scanner_get_next_token (scanner);
break;
case G_TOKEN_RIGHT_PAREN:
if (open_paren == 0)
return token;
open_paren--;
g_scanner_get_next_token (scanner);
break;
case G_TOKEN_EOF:
return token;
default:
g_scanner_get_next_token (scanner);
break;
}
}
}
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