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/* json-scanner.h: Tokenizer for JSON
*
* This file is part of JSON-GLib
* Copyright (C) 2008 OpenedHand
*
* 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 2 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
* Lesser 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 <http://www.gnu.org/licenses/>.
*/
/*
* JsonScanner is a specialized tokenizer for JSON adapted from
* the GScanner tokenizer in GLib; GScanner came with this notice:
*
* Modified by the GLib Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GLib Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GLib at ftp://ftp.gtk.org/pub/gtk/.
*
* JsonScanner: modified by Emmanuele Bassi <ebassi@openedhand.com>
*/
#ifndef __JSON_SCANNER_H__
#define __JSON_SCANNER_H__
#include <glib.h>
G_BEGIN_DECLS
typedef struct _JsonScanner JsonScanner;
typedef struct _JsonScannerConfig JsonScannerConfig;
typedef void (* JsonScannerMsgFunc) (JsonScanner *scanner,
gchar *message);
/**
* JsonTokenType:
* @JSON_TOKEN_INVALID: marker
* @JSON_TOKEN_TRUE: symbol for 'true' bareword
* @JSON_TOKEN_FALSE: symbol for 'false' bareword
* @JSON_TOKEN_NULL: symbol for 'null' bareword
* @JSON_TOKEN_VAR: symbol for 'var' bareword
* @JSON_TOKEN_LAST: marker
*
* Tokens for JsonScanner-based parser, extending #GTokenType.
*/
typedef enum {
JSON_TOKEN_INVALID = G_TOKEN_LAST,
JSON_TOKEN_TRUE,
JSON_TOKEN_FALSE,
JSON_TOKEN_NULL,
JSON_TOKEN_VAR,
JSON_TOKEN_LAST
} JsonTokenType;
/**
* JsonScanner:
*
* Tokenizer scanner for JSON. See #GScanner
*
* Since: 0.6
*/
struct _JsonScanner
{
/*< private >*/
/* unused fields */
gpointer user_data;
guint max_parse_errors;
/* json_scanner_error() increments this field */
guint parse_errors;
/* name of input stream, featured by the default message handler */
const gchar *input_name;
/* quarked data */
GData *qdata;
/* link into the scanner configuration */
JsonScannerConfig *config;
/* fields filled in after json_scanner_get_next_token() */
GTokenType token;
GTokenValue value;
guint line;
guint position;
/* fields filled in after json_scanner_peek_next_token() */
GTokenType next_token;
GTokenValue next_value;
guint next_line;
guint next_position;
/* to be considered private */
GHashTable *symbol_table;
const gchar *text;
const gchar *text_end;
gchar *buffer;
guint scope_id;
/* handler function for _warn and _error */
JsonScannerMsgFunc msg_handler;
};
G_GNUC_INTERNAL
JsonScanner *json_scanner_new (void);
G_GNUC_INTERNAL
void json_scanner_destroy (JsonScanner *scanner);
G_GNUC_INTERNAL
void json_scanner_input_text (JsonScanner *scanner,
const gchar *text,
guint text_len);
G_GNUC_INTERNAL
GTokenType json_scanner_get_next_token (JsonScanner *scanner);
G_GNUC_INTERNAL
GTokenType json_scanner_peek_next_token (JsonScanner *scanner);
G_GNUC_INTERNAL
void json_scanner_scope_add_symbol (JsonScanner *scanner,
guint scope_id,
const gchar *symbol,
gpointer value);
G_GNUC_INTERNAL
void json_scanner_unexp_token (JsonScanner *scanner,
GTokenType expected_token,
const gchar *identifier_spec,
const gchar *symbol_spec,
const gchar *symbol_name,
const gchar *message);
G_GNUC_INTERNAL
void json_scanner_error (JsonScanner *scanner,
const gchar *format,
...) G_GNUC_PRINTF (2,3);
G_END_DECLS
#endif /* __JSON_SCANNER_H__ */
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