diff options
| -rw-r--r-- | qobject/json-parser.c | 165 |
1 files changed, 47 insertions, 118 deletions
diff --git a/qobject/json-parser.c b/qobject/json-parser.c index b57cac74af..60dd6243a6 100644 --- a/qobject/json-parser.c +++ b/qobject/json-parser.c @@ -265,23 +265,6 @@ static QObject *parser_context_peek_token(JSONParserContext *ctxt) return token; } -static JSONParserContext parser_context_save(JSONParserContext *ctxt) -{ - JSONParserContext saved_ctxt = {0}; - saved_ctxt.tokens.pos = ctxt->tokens.pos; - saved_ctxt.tokens.count = ctxt->tokens.count; - saved_ctxt.tokens.buf = ctxt->tokens.buf; - return saved_ctxt; -} - -static void parser_context_restore(JSONParserContext *ctxt, - JSONParserContext saved_ctxt) -{ - ctxt->tokens.pos = saved_ctxt.tokens.pos; - ctxt->tokens.count = saved_ctxt.tokens.count; - ctxt->tokens.buf = saved_ctxt.tokens.buf; -} - static void tokens_append_from_iter(QObject *obj, void *opaque) { JSONParserContext *ctxt = opaque; @@ -333,7 +316,6 @@ static void parser_context_free(JSONParserContext *ctxt) static int parse_pair(JSONParserContext *ctxt, QDict *dict, va_list *ap) { QObject *key = NULL, *token = NULL, *value, *peek; - JSONParserContext saved_ctxt = parser_context_save(ctxt); peek = parser_context_peek_token(ctxt); if (peek == NULL) { @@ -371,7 +353,6 @@ static int parse_pair(JSONParserContext *ctxt, QDict *dict, va_list *ap) return 0; out: - parser_context_restore(ctxt, saved_ctxt); qobject_decref(key); return -1; @@ -381,16 +362,9 @@ static QObject *parse_object(JSONParserContext *ctxt, va_list *ap) { QDict *dict = NULL; QObject *token, *peek; - JSONParserContext saved_ctxt = parser_context_save(ctxt); token = parser_context_pop_token(ctxt); - if (token == NULL) { - goto out; - } - - if (token_get_type(token) != JSON_LCURLY) { - goto out; - } + assert(token && token_get_type(token) == JSON_LCURLY); dict = qdict_new(); @@ -434,7 +408,6 @@ static QObject *parse_object(JSONParserContext *ctxt, va_list *ap) return QOBJECT(dict); out: - parser_context_restore(ctxt, saved_ctxt); QDECREF(dict); return NULL; } @@ -443,16 +416,9 @@ static QObject *parse_array(JSONParserContext *ctxt, va_list *ap) { QList *list = NULL; QObject *token, *peek; - JSONParserContext saved_ctxt = parser_context_save(ctxt); token = parser_context_pop_token(ctxt); - if (token == NULL) { - goto out; - } - - if (token_get_type(token) != JSON_LSQUARE) { - goto out; - } + assert(token && token_get_type(token) == JSON_LSQUARE); list = qlist_new(); @@ -506,109 +472,72 @@ static QObject *parse_array(JSONParserContext *ctxt, va_list *ap) return QOBJECT(list); out: - parser_context_restore(ctxt, saved_ctxt); QDECREF(list); return NULL; } static QObject *parse_keyword(JSONParserContext *ctxt) { - QObject *token, *ret; - JSONParserContext saved_ctxt = parser_context_save(ctxt); + QObject *token; const char *val; token = parser_context_pop_token(ctxt); - if (token == NULL) { - goto out; - } - - if (token_get_type(token) != JSON_KEYWORD) { - goto out; - } - + assert(token && token_get_type(token) == JSON_KEYWORD); val = token_get_value(token); if (!strcmp(val, "true")) { - ret = QOBJECT(qbool_from_bool(true)); + return QOBJECT(qbool_from_bool(true)); } else if (!strcmp(val, "false")) { - ret = QOBJECT(qbool_from_bool(false)); + return QOBJECT(qbool_from_bool(false)); } else if (!strcmp(val, "null")) { - ret = qnull(); - } else { - parse_error(ctxt, token, "invalid keyword '%s'", val); - goto out; + return qnull(); } - - return ret; - -out: - parser_context_restore(ctxt, saved_ctxt); - + parse_error(ctxt, token, "invalid keyword '%s'", val); return NULL; } static QObject *parse_escape(JSONParserContext *ctxt, va_list *ap) { - QObject *token = NULL, *obj; - JSONParserContext saved_ctxt = parser_context_save(ctxt); + QObject *token; const char *val; if (ap == NULL) { - goto out; + return NULL; } token = parser_context_pop_token(ctxt); - if (token == NULL) { - goto out; - } - - if (token_get_type(token) != JSON_ESCAPE) { - goto out; - } - + assert(token && token_get_type(token) == JSON_ESCAPE); val = token_get_value(token); if (!strcmp(val, "%p")) { - obj = va_arg(*ap, QObject *); + return va_arg(*ap, QObject *); } else if (!strcmp(val, "%i")) { - obj = QOBJECT(qbool_from_bool(va_arg(*ap, int))); + return QOBJECT(qbool_from_bool(va_arg(*ap, int))); } else if (!strcmp(val, "%d")) { - obj = QOBJECT(qint_from_int(va_arg(*ap, int))); + return QOBJECT(qint_from_int(va_arg(*ap, int))); } else if (!strcmp(val, "%ld")) { - obj = QOBJECT(qint_from_int(va_arg(*ap, long))); + return QOBJECT(qint_from_int(va_arg(*ap, long))); } else if (!strcmp(val, "%lld") || !strcmp(val, "%I64d")) { - obj = QOBJECT(qint_from_int(va_arg(*ap, long long))); + return QOBJECT(qint_from_int(va_arg(*ap, long long))); } else if (!strcmp(val, "%s")) { - obj = QOBJECT(qstring_from_str(va_arg(*ap, const char *))); + return QOBJECT(qstring_from_str(va_arg(*ap, const char *))); } else if (!strcmp(val, "%f")) { - obj = QOBJECT(qfloat_from_double(va_arg(*ap, double))); - } else { - goto out; + return QOBJECT(qfloat_from_double(va_arg(*ap, double))); } - - return obj; - -out: - parser_context_restore(ctxt, saved_ctxt); - return NULL; } static QObject *parse_literal(JSONParserContext *ctxt) { - QObject *token, *obj; - JSONParserContext saved_ctxt = parser_context_save(ctxt); + QObject *token; token = parser_context_pop_token(ctxt); - if (token == NULL) { - goto out; - } + assert(token); switch (token_get_type(token)) { case JSON_STRING: - obj = QOBJECT(qstring_from_escaped_str(ctxt, token)); - break; + return QOBJECT(qstring_from_escaped_str(ctxt, token)); case JSON_INTEGER: { /* A possibility exists that this is a whole-valued float where the * fractional part was left out due to being 0 (.0). It's not a big @@ -627,46 +556,46 @@ static QObject *parse_literal(JSONParserContext *ctxt) errno = 0; /* strtoll doesn't set errno on success */ value = strtoll(token_get_value(token), NULL, 10); if (errno != ERANGE) { - obj = QOBJECT(qint_from_int(value)); - break; + return QOBJECT(qint_from_int(value)); } /* fall through to JSON_FLOAT */ } case JSON_FLOAT: /* FIXME dependent on locale */ - obj = QOBJECT(qfloat_from_double(strtod(token_get_value(token), NULL))); - break; + return QOBJECT(qfloat_from_double(strtod(token_get_value(token), + NULL))); default: - goto out; + abort(); } - - return obj; - -out: - parser_context_restore(ctxt, saved_ctxt); - - return NULL; } static QObject *parse_value(JSONParserContext *ctxt, va_list *ap) { - QObject *obj; + QObject *token; - obj = parse_object(ctxt, ap); - if (obj == NULL) { - obj = parse_array(ctxt, ap); - } - if (obj == NULL) { - obj = parse_escape(ctxt, ap); - } - if (obj == NULL) { - obj = parse_keyword(ctxt); - } - if (obj == NULL) { - obj = parse_literal(ctxt); + token = parser_context_peek_token(ctxt); + if (token == NULL) { + parse_error(ctxt, NULL, "premature EOI"); + return NULL; } - return obj; + switch (token_get_type(token)) { + case JSON_LCURLY: + return parse_object(ctxt, ap); + case JSON_LSQUARE: + return parse_array(ctxt, ap); + case JSON_ESCAPE: + return parse_escape(ctxt, ap); + case JSON_INTEGER: + case JSON_FLOAT: + case JSON_STRING: + return parse_literal(ctxt); + case JSON_KEYWORD: + return parse_keyword(ctxt); + default: + parse_error(ctxt, token, "expecting value"); + return NULL; + } } QObject *json_parser_parse(QList *tokens, va_list *ap) |