diff options
| author | Marc Mutz <marc.mutz@qt.io> | 2024-02-20 19:01:00 +0100 |
|---|---|---|
| committer | Marc Mutz <marc.mutz@qt.io> | 2024-02-27 16:58:27 +0100 |
| commit | 476d2a7392ee26294d1230f0c5031fe6bb4a0f26 (patch) | |
| tree | d0118b776d0bb544e18c4224ac0bafcdfe8c2360 /src/dbus | |
| parent | 63b52ba994ca9d9a0ceaeab465f64465b1fa137a (diff) | |
QDBusUtil: document the D-Bus signature grammar
The specification doesn't provide an explicit grammar, so I turned the
prose into ABNF for easier reference.
The goal is both to aid review of the validateSingleType() function
and to eventually use this to write a parser that doesn't use, or at
least limits, recursion.
Pick-to: 6.7 6.6 6.5 6.2 5.15
Change-Id: I21f81aa83cde356ab48105ea98f066024e0b7b5e
Reviewed-by: Juha Vuolle <juha.vuolle@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/dbus')
| -rw-r--r-- | src/dbus/qdbusutil.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/dbus/qdbusutil.cpp b/src/dbus/qdbusutil.cpp index 6a0d546ee4..827418c487 100644 --- a/src/dbus/qdbusutil.cpp +++ b/src/dbus/qdbusutil.cpp @@ -206,6 +206,21 @@ static const char oneLetterTypes[] = "vsogybnqiuxtdh"; static const char basicTypes[] = "sogybnqiuxtdh"; static const char fixedTypes[] = "ybnqiuxtdh"; +/* + D-Bus signature grammar (in ABNF), as of 0.42 (2023-08-21): + https://dbus.freedesktop.org/doc/dbus-specification.html#type-system + + <signature> = *<single-complete-type> + <single-complete-type> = <basic-type> / <variant> / <struct> / <array> + <fixed-type> = "y" / "b" / "n" / "q" / "i" / "u" / "x" / "t" / "d" / "h" + <variable-length-type> = "s" / "o" / "g" + <basic-type> = <variable-length-type> / <fixed-type> + <variant> = "v" + <struct> = "(" 1*<single-complete-type> ")" + <array> = "a" ( <single-complete-type> / <dict-entry> ) + <dict-entry> = "{" <basic-type> <single-complete-type> "}" +*/ + static bool isBasicType(int c) { return c != DBUS_TYPE_INVALID && strchr(basicTypes, c) != nullptr; |