qemu/qobject/json-parser-int.h
Markus Armbruster 1e960b4602 json: Eliminate lexer state IN_WHITESPACE, pseudo-token JSON_SKIP
The lexer ignores whitespace like this:

         on whitespace      on non-ws   spontaneously
    IN_START --> IN_WHITESPACE --> JSON_SKIP --> IN_START
                    ^    |
                     \__/  on whitespace

This accumulates a whitespace token in state IN_WHITESPACE, only to
throw it away on the transition via JSON_SKIP to the start state.
Wasteful.  Go from IN_START to IN_START on whitespace directly,
dropping the whitespace character.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180831075841.13363-7-armbru@redhat.com>
2018-09-24 18:08:07 +02:00

55 lines
1.3 KiB
C

/*
* JSON Parser
*
* 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 JSON_PARSER_INT_H
#define JSON_PARSER_INT_H
#include "qapi/qmp/json-parser.h"
typedef enum json_token_type {
JSON_ERROR = 0, /* must be zero, see json_lexer[] */
/* Gap for lexer states */
JSON_LCURLY = 100,
JSON_MIN = JSON_LCURLY,
JSON_RCURLY,
JSON_LSQUARE,
JSON_RSQUARE,
JSON_COLON,
JSON_COMMA,
JSON_INTEGER,
JSON_FLOAT,
JSON_KEYWORD,
JSON_STRING,
JSON_INTERP,
JSON_END_OF_INPUT,
JSON_MAX = JSON_END_OF_INPUT
} JSONTokenType;
typedef struct JSONToken JSONToken;
/* json-lexer.c */
void json_lexer_init(JSONLexer *lexer, bool enable_interpolation);
void json_lexer_feed(JSONLexer *lexer, const char *buffer, size_t size);
void json_lexer_flush(JSONLexer *lexer);
void json_lexer_destroy(JSONLexer *lexer);
/* json-streamer.c */
void json_message_process_token(JSONLexer *lexer, GString *input,
JSONTokenType type, int x, int y);
/* json-parser.c */
JSONToken *json_token(JSONTokenType type, int x, int y, GString *tokstr);
QObject *json_parser_parse(GQueue *tokens, va_list *ap, Error **errp);
#endif