From 069b64e3fe75c81edef6685c9941a7937a48fec4 Mon Sep 17 00:00:00 2001 From: Markus Armbruster Date: Tue, 28 Feb 2017 22:27:04 +0100 Subject: qapi: New parse_qapi_name() Signed-off-by: Markus Armbruster Reviewed-by: Eric Blake Message-Id: <1488317230-26248-19-git-send-email-armbru@redhat.com> --- qapi/qapi-util.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) (limited to 'qapi/qapi-util.c') diff --git a/qapi/qapi-util.c b/qapi/qapi-util.c index 818730a..e28dbd0 100644 --- a/qapi/qapi-util.c +++ b/qapi/qapi-util.c @@ -33,3 +33,50 @@ int qapi_enum_parse(const char * const lookup[], const char *buf, error_setg(errp, "invalid parameter value: %s", buf); return def; } + +/* + * Parse a valid QAPI name from @str. + * A valid name consists of letters, digits, hyphen and underscore. + * It may be prefixed by __RFQDN_ (downstream extension), where RFQDN + * may contain only letters, digits, hyphen and period. + * The special exception for enumeration names is not implemented. + * See docs/qapi-code-gen.txt for more on QAPI naming rules. + * Keep this consistent with scripts/qapi.py! + * If @complete, the parse fails unless it consumes @str completely. + * Return its length on success, -1 on failure. + */ +int parse_qapi_name(const char *str, bool complete) +{ + const char *p = str; + + if (*p == '_') { /* Downstream __RFQDN_ */ + p++; + if (*p != '_') { + return -1; + } + while (*++p) { + if (!qemu_isalnum(*p) && *p != '-' && *p != '.') { + break; + } + } + + if (*p != '_') { + return -1; + } + p++; + } + + if (!qemu_isalpha(*p)) { + return -1; + } + while (*++p) { + if (!qemu_isalnum(*p) && *p != '-' && *p != '_') { + break; + } + } + + if (complete && *p) { + return -1; + } + return p - str; +} -- cgit v1.1