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Add a JSON message boundary identifier

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The second stage of our JSON parser is a simple state machine that identifies
individual JSON values by counting the levels of nesting of tokens.  It does
not perform grammar validation.  We use this to emit a full JSON value to the
parser.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Anthony Liguori 2009-11-11 10:38:59 -06:00
parent 5ab8558d9b
commit d7ff3acbb4
3 changed files with 128 additions and 0 deletions
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39
json-streamer.h Normal file
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/*
* JSON streaming support
*
* Copyright IBM, Corp. 2009
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
*
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
* See the COPYING.LIB file in the top-level directory.
*
*/
#ifndef QEMU_JSON_STREAMER_H
#define QEMU_JSON_STREAMER_H
#include "qlist.h"
#include "json-lexer.h"
typedef struct JSONMessageParser
{
void (*emit)(struct JSONMessageParser *parser, QList *tokens);
JSONLexer lexer;
int brace_count;
int bracket_count;
QList *tokens;
} JSONMessageParser;
void json_message_parser_init(JSONMessageParser *parser,
void (*func)(JSONMessageParser *, QList *));
int json_message_parser_feed(JSONMessageParser *parser,
const char *buffer, size_t size);
int json_message_parser_flush(JSONMessageParser *parser);
void json_message_parser_destroy(JSONMessageParser *parser);
#endif