168 lines
4.0 KiB
C
168 lines
4.0 KiB
C
/*
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* This file Copyright (C) 2008 Charles Kerr <charles@transmissionbt.com>
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*
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* This file is licensed by the GPL version 2. Works owned by the
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* Transmission project are granted a special exemption to clause 2(b)
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* so that the bulk of its code can remain under the MIT license.
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* This exemption does not extend to derived works not owned by
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* the Transmission project.
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*
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* $Id$
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*/
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h> /* printf */
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#include <event.h> /* evbuffer */
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#include "JSON_parser.h"
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#include "transmission.h"
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#include "bencode.h"
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#include "json.h"
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#include "ptrarray.h"
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#include "utils.h"
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struct json_benc_data
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{
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tr_benc * top;
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tr_ptrArray * stack;
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char * key;
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};
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static tr_benc*
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getNode( struct json_benc_data * data )
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{
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tr_benc * parent;
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tr_benc * node = NULL;
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if( tr_ptrArrayEmpty( data->stack ) )
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parent = NULL;
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else
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parent = tr_ptrArrayBack( data->stack );
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if( !parent )
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node = data->top;
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else if( tr_bencIsList( parent ) )
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node = tr_bencListAdd( parent );
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else if( tr_bencIsDict( parent ) && data->key )
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{
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node = tr_bencDictAdd( parent, data->key );
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tr_free( data->key );
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data->key = NULL;
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}
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return node;
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}
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static int
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callback( void * vdata,
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int type,
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const JSON_value * value )
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{
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struct json_benc_data * data = vdata;
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tr_benc * node;
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switch( type )
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{
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case JSON_T_ARRAY_BEGIN:
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node = getNode( data );
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tr_bencInitList( node, 0 );
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tr_ptrArrayAppend( data->stack, node );
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break;
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case JSON_T_ARRAY_END:
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tr_ptrArrayPop( data->stack );
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break;
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case JSON_T_OBJECT_BEGIN:
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node = getNode( data );
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tr_bencInitDict( node, 0 );
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tr_ptrArrayAppend( data->stack, node );
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break;
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case JSON_T_OBJECT_END:
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tr_ptrArrayPop( data->stack );
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break;
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case JSON_T_FLOAT:
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{
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char buf[128];
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tr_snprintf( buf, sizeof( buf ), "%f",
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(double)value->vu.float_value );
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tr_bencInitStr( getNode( data ), buf, -1 );
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break;
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}
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case JSON_T_NULL:
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tr_bencInitStr( getNode( data ), "", 0 );
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break;
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case JSON_T_INTEGER:
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tr_bencInitInt( getNode( data ), value->vu.integer_value );
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break;
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case JSON_T_TRUE:
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tr_bencInitInt( getNode( data ), 1 );
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break;
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case JSON_T_FALSE:
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tr_bencInitInt( getNode( data ), 0 );
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break;
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case JSON_T_STRING:
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tr_bencInitStr( getNode( data ),
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value->vu.str.value,
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value->vu.str.length );
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break;
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case JSON_T_KEY:
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assert( !data->key );
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data->key = tr_strdup( value->vu.str.value );
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break;
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}
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return 1;
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}
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int
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tr_jsonParse( const void * vbuf,
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size_t len,
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tr_benc * setme_benc,
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const uint8_t ** setme_end )
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{
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int err = 0;
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const unsigned char * buf = vbuf;
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const void * bufend = buf + len;
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struct JSON_config_struct config;
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struct JSON_parser_struct * checker;
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struct json_benc_data data;
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init_JSON_config( &config );
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config.callback = callback;
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config.callback_ctx = &data;
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config.depth = -1;
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data.key = NULL;
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data.top = setme_benc;
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data.stack = tr_ptrArrayNew( );
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checker = new_JSON_parser( &config );
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while( ( buf != bufend ) && JSON_parser_char( checker, *buf ) )
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++buf;
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if( buf != bufend )
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err = EILSEQ;
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if( setme_end )
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*setme_end = (const uint8_t*) buf;
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delete_JSON_parser( checker );
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tr_ptrArrayFree( data.stack, NULL );
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return err;
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}
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