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From c4c2e01b3fa861de40f809785a0643d56e2b311e Mon Sep 17 00:00:00 2001
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From: Markus Armbruster <armbru@redhat.com>
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Date: Wed, 27 Jul 2016 07:35:03 +0200
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Subject: [PATCH 05/16] qjson: Spell out some silent assumptions
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RH-Author: Markus Armbruster <armbru@redhat.com>
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Message-id: <1469604913-12442-7-git-send-email-armbru@redhat.com>
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Patchwork-id: 71473
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O-Subject: [RHEL-7.3 qemu-kvm PATCH v2 05/15] qjson: Spell out some silent assumptions
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Bugzilla: 1276036
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Acked-by: John Snow <jsnow@redhat.com>
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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Message-Id: <1448486613-17634-5-git-send-email-armbru@redhat.com>
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Reviewed-by: Eric Blake <eblake@redhat.com>
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(cherry picked from commit b8d3b1da3cdbb02e180618d6be346c564723015d)
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Signed-off-by: Markus Armbruster <armbru@redhat.com>
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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include/qapi/qmp/json-lexer.h | 3 ++-
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qobject/json-lexer.c | 7 ++++++-
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2 files changed, 8 insertions(+), 2 deletions(-)
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diff --git a/include/qapi/qmp/json-lexer.h b/include/qapi/qmp/json-lexer.h
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index cdff046..61a143f 100644
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--- a/include/qapi/qmp/json-lexer.h
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+++ b/include/qapi/qmp/json-lexer.h
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@@ -18,7 +18,8 @@
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#include "qapi/qmp/qlist.h"
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typedef enum json_token_type {
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- JSON_OPERATOR = 100,
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+ JSON_MIN = 100,
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+ JSON_OPERATOR = JSON_MIN,
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JSON_INTEGER,
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JSON_FLOAT,
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JSON_KEYWORD,
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diff --git a/qobject/json-lexer.c b/qobject/json-lexer.c
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index 440df60..f106ffb 100644
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--- a/qobject/json-lexer.c
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+++ b/qobject/json-lexer.c
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@@ -30,7 +30,7 @@
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*/
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enum json_lexer_state {
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- IN_ERROR = 0,
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+ IN_ERROR = 0, /* must really be 0, see json_lexer[] */
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IN_DQ_UCODE3,
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IN_DQ_UCODE2,
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IN_DQ_UCODE1,
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@@ -62,6 +62,8 @@ enum json_lexer_state {
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IN_START,
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};
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+QEMU_BUILD_BUG_ON((int)JSON_MIN <= (int)IN_START);
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+
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#define TERMINAL(state) [0 ... 0x7F] = (state)
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/* Return whether TERMINAL is a terminal state and the transition to it
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@@ -71,6 +73,8 @@ enum json_lexer_state {
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(json_lexer[(old_state)][0] == (terminal))
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static const uint8_t json_lexer[][256] = {
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+ /* Relies on default initialization to IN_ERROR! */
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+
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/* double quote string */
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[IN_DQ_UCODE3] = {
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['0' ... '9'] = IN_DQ_STRING,
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@@ -287,6 +291,7 @@ static int json_lexer_feed_char(JSONLexer *lexer, char ch, bool flush)
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}
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do {
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+ assert(lexer->state <= ARRAY_SIZE(json_lexer));
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new_state = json_lexer[lexer->state][(uint8_t)ch];
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char_consumed = !TERMINAL_NEEDED_LOOKAHEAD(lexer->state, new_state);
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if (char_consumed) {
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--
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1.8.3.1
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