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qjson: Spell out some silent assumptions
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1448486613-17634-5-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
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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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@ -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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#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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/* 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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