kc3-lang/libxkbcommon/test

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• Hash : 5b5b67f2
  Author :
  Date : 2023-05-01T22:30:41
  

  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.
  

• Files

• atom.c
• buffercomp.c
• common.c
• compose.c
• context.c
• data/
• evdev-scancodes.h
• filecomp.c
• keymap.c
• keyseq.c
• keysym.c
• log.c
• modifiers.c
• registry.c
• rules-file-includes.c
• rules-file.c
• rulescomp.c
• state.c
• stringcomp.c
• symbols-leak-test.py
• test-keysym.py
• test.h
• tool-option-parsing.py
• utf8.c
• utils.c
• x11.c
• x11comp.c
• xkeyboard-config-test.py.in

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