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5b5b67f2
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2023-05-01T22:30:41
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Add support for modmap None (#291)
Unlike current xkbcommon, X11’s xkbcomp allows to remove entries in
the modifiers’ map using “modifier_map None { … }”.
“None” is translated to the special value “XkbNoModifier” defined in
“X11/extensions/XKB.h”. Then it relies on the fact that in "CopyModMapDef",
the following code:
1U << entry->modifier
ends up being zero when “entry->modifier” is “XkbNoModifier” (i.e. 0xFF).
Indeed, it relies on the overflow behaviour of the left shift, which in
practice resolves to use only the 5 low bits of the shift amount, i.e.
0x1F here. Then the result of “1U << 0xFF” is cast to “char”, i.e. 0.
This is a good trick but too magical, so in libxkbcommon we will use
an explicit test against our new constant XKB_MOD_NONE.
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3a6c3b2c
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2021-03-30T20:34:11
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ast: remove comment re. anonymous struct
C11 is not sufficient for this, needs `--ms-extensions` which we don't
want to enable.
Signed-off-by: Ran Benita <ran@unusedvar.com>
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400cc849
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2019-11-12T20:04:13
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ast: use a separate expr struct for action list
Currently it's under UnaryExpr, which just doesn't make sense.
Signed-off-by: Ran Benita <ran@unusedvar.com>
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e3cacae7
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2018-03-10T23:32:12
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xkbcomp: fix crashes in the parser when geometry tokens appear
In the XKB format, floats and various keywords can only be used in the
xkb_geometry section. xkbcommon removed support xkb_geometry, but still
parses it for backward compatibility. As part of ignoring it, the float
AST node and various keywords were removed, and instead NULL was
returned by their parsing actions. However, the rest of the code does
not handle NULLs, and so when they appear crashes usually ensue.
To fix this, restore the float AST node and the ignored keywords. None
of the evaluating code expects them, so nice error are displayed.
Caught with the afl fuzzer.
Signed-off-by: Ran Benita <ran234@gmail.com>
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4a660d7f
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2014-10-18T19:47:19
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xkbcomp: remove file->topName
It is useless.
Signed-off-by: Ran Benita <ran234@gmail.com>
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0e20cfed
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2014-02-08T02:01:17
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Partially revert "ast: pack the ParseCommon struct"
This reverts commit 1e6e5669c6229846830f0b497591de4e3cf588eb.
It's probably safe, but let's not take any chances, as I don't have any
esoteric arch to test on. But keep the ATTR in case it's ever useful.
Signed-off-by: Ran Benita <ran234@gmail.com>
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6ea15719
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2014-02-08T01:26:35
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ast: use more suitable types in a few ast nodes
The int ones cannot be signed (they come as such from the scanner, and
NEGATE is never applied to them).
The uint32_t one is really an atom, but presumably the type was never
converted to xkb_atom_t.
Signed-off-by: Ran Benita <ran234@gmail.com>
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6f2df7df
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2014-02-07T19:28:48
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ast: make symsMapIndex unsigned
It doesn't need to be signed.
Signed-off-by: Ran Benita <ran234@gmail.com>
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1e6e5669
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2013-12-14T17:39:11
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ast: pack the ParseCommon struct
This shows a measurable improvement in memory and performance for free,
on 64bit at least. Packing is (or should be) safe in this case.
Signed-off-by: Ran Benita <ran234@gmail.com>
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972395b8
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2013-12-01T12:08:47
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expr: split expression types and allocate them separately
Currently, we have one ExprDef type, which contains a tagged union with
the value of all expression types. Turns out, this union is quite
wasteful memory-wise. Instead, create separate types for all expressions
(e.g ExprBinary, ExprInteger) which embed the common fields
(ExprCommon), and malloc them per their size; ExprDef then becomes a
union of all these types, but is just used as a generic pointer.
[Instead of making ExprDef a union, another option is to use
ExprCommon as the generic pointer type and then do up-castings, like we
do with ParseCommon. But this makes the code much uglier.]
The diff is mostly straightforward mechanical adaptations. It could have
been much smaller with the help of C11 anonymous structs (which were
previously a gnu extension). This will have saved all of the 'op' ->
'expr->op', etc changes. But if we can be a bit more portable for a
little effort, we should.
Before (./test/rulescomp, x86 32 bit, -O2):
==12974== total heap usage: 145,217 allocs, 145,217 frees, 10,476,238 bytes allocated
After:
==11145== total heap usage: 145,217 allocs, 145,217 frees, 8,270,358 bytes allocated
Signed-off-by: Ran Benita <ran234@gmail.com>
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068016e4
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2013-12-01T10:45:52
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parser, symbols: drop unnecessary casts
It's casted into ExprDef and then uncasted for no reason.
Signed-off-by: Ran Benita <ran234@gmail.com>
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c24b6420
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2013-11-30T23:24:18
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expr: add constructor for boolean expressions
Also add a 'bool set' to the ExprDef union, instead of using 'ival' as a
bool.
Signed-off-by: Ran Benita <ran234@gmail.com>
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dbd8b1ef
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2013-11-30T22:25:39
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expr: add 'ident' value to ExprDef union
This distinguishes between an identifier expression and a string
expression in the union.
Signed-off-by: Ran Benita <ran234@gmail.com>
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9dc5b8cb
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2013-11-27T13:49:13
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Resolve keysyms early in parser
Instead of having the parser passing strings to the AST, and
symbols/compat etc. resolving them themselves. This simplifies the code
a bit, and makes it possible to print where exactly in the file the bad
keysym originates from.
The previous lazy approach had an advantage of not needlessly resolving
keysyms from unrelated maps. However, I think reporting these errors in
*any* map is better, and the parser is also a bit smarter then old
xkbcomp and doesn't parse many useless maps. So there's no discernible
speed/memory difference with this change.
Signed-off-by: Ran Benita <ran234@gmail.com>
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56ba9866
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2013-03-04T14:16:36
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Remove file_id entirely
It is not used anymore.
Signed-off-by: Ran Benita <ran234@gmail.com>
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8cee7490
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2013-02-17T22:18:57
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Change 'indicator' to 'led' everywhere possible
The code currently uses the two names interchangeably.
Settle on 'led', because it is shorter, more recognizable, and what we
use in our API (though of course the parser still uses 'indicator').
In camel case we make it 'Led'.
We change 'xkb_indicator_map' to just 'xkb_led' and the variables of
this type are 'led'. This mimics 'xkb_key' and 'key'.
IndicatorNameInfo and LEDInfo are changed to 'LedNameInfo' and
'LedInfo', and the variables are 'ledi' (like 'keyi' etc.). This is
instead of 'ii' and 'im'.
This might make a few places a bit confusing, but less than before I
think. It's also shorter.
Signed-off-by: Ran Benita <ran234@gmail.com>
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a75989b9
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2012-10-04T12:39:22
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Omit struct '_Name' from non-recursive struct typedefs
Just a pet peeve.
Signed-off-by: Ran Benita <ran234@gmail.com>
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41a7fed3
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2012-09-27T19:21:26
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Fix type of keycode in parser and ast
For some reason keycodes were listed under mapFlags in the yylval union.
Fix it and some sanity checks.
Signed-off-by: Ran Benita <ran234@gmail.com>
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3b389b15
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2012-09-27T18:49:13
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Don't limit key names to 4 characters
Currently you can't give a key in xkb_keycodes a name of more than
XKB_KEY_NAME_LENGTH (= 4) chars. This is a pretty annoying and arbitrary
limitation; it leads to names such as <RTSH>, <COMP>, <PRSC>, <KPAD>
etc. which may be hard to decipher, and makes it impossible to give
more standard names (e.g. from linux/input.h) to keycodes.
The purpose of this, as far as I can tell, was to save memory and to
allow encoding a key name directly to a 32 bit value (unsigned long it
was).
We remove this limitation by just storing the names as atoms; this lifts
the limit, allows for easy comparison like the unsigned long thing, and
doesn't use more memory than previous solution. It also relieves us from
doing all of the annoying conversions to/from long.
This has a large diffstat only because KeyNameText, which is used a lot,
now needs to take the context in order to resolve the atom.
Signed-off-by: Ran Benita <ran234@gmail.com>
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b4b40d73
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2012-09-12T16:54:07
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Copyright updates
With Dan Nicholson's permission (via email), update his copyright and
license statements to the standard X.Org boilerplate MIT license, as
both myself and Ran have been using.
Clean up my copyright declarations (in some cases to correct ownership),
and add copyright/license statements from myself and/or Ran where
appropriate.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
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b6e04571
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2012-09-10T20:16:05
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kbproto unentanglement: XkbLC_*
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
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f5dffd2b
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2012-08-21T11:21:19
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kbproto untanglement: XkbKeyNameLength
Define it ourselves as XKB_KEY_NAME_LENGTH and use that, instead of the
one from XKB.h.
Signed-off-by: Daniel Stone <daniel@fooishbar.org>
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591df115
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2012-08-27T19:20:41
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Move enum xkb_file_type to xkbcomp/ast.h
This is a more suitable place for this enum, since it's internal to
xkbcomp.
Signed-off-by: Ran Benita <ran234@gmail.com>
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d3ddcf70
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2012-08-15T21:45:02
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expr: move op_type/value_type_to_string functions to ast
Generally the enum-to-string function should appear where the enum is
defined.
Signed-off-by: Ran Benita <ran234@gmail.com>
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cdc228ea
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2012-08-13T11:00:43
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Organize xkbcomp/ header files
Various non-functional changes:
- Re-add keycodes.h and move some stuff there.
- Add parser-priv.h for internal bison/flex stuff.
- Don't include headers from other headers, such that file dependencies
are immediate in each file.
- Rename xkbcomp.h -> ast.h, parseutils.{c,h} -> ast-build.{c,h}
- Rename path.{c,h} -> include.{c,h}
- Rename keytypes.c -> types.c
- Make the naming of XkbFile-related functions more consistent.
- Move xkb_map_{new,ref,unref} to map.c.
- Remove most extern keyword from function declarations, it's just
noise (XKB_EXPORT is what's important here).
- Append XKBCOMP_ to include guards.
- Shuffle some code around to make all of this work.
Splitting this would be a headache..
Signed-off-by: Ran Benita <ran234@gmail.com>
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