kc3-lang/libxkbcommon/test/filecomp.c

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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.

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• test/filecomp.c

• /*
   * Copyright © 2009 Dan Nicholson
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   */
  
  #include "config.h"
  
  #include "test.h"
  
  static int
  test_file(struct xkb_context *ctx, const char *path_rel)
  {
      struct xkb_keymap *keymap = test_compile_file(ctx, path_rel);
  
      if (!keymap)
          return 0;
  
      xkb_keymap_unref(keymap);
      return 1;
  }
  
  int
  main(void)
  {
      struct xkb_context *ctx = test_get_context(0);
  
      assert(test_file(ctx, "keymaps/basic.xkb"));
      assert(test_file(ctx, "keymaps/comprehensive-plus-geom.xkb"));
      assert(test_file(ctx, "keymaps/no-types.xkb"));
      assert(test_file(ctx, "keymaps/quartz.xkb"));
      assert(test_file(ctx, "keymaps/no-aliases.xkb"));
      assert(test_file(ctx, "keymaps/modmap-none.xkb"));
  
      assert(!test_file(ctx, "keymaps/divide-by-zero.xkb"));
      assert(!test_file(ctx, "keymaps/bad.xkb"));
      assert(!test_file(ctx, "keymaps/syntax-error.xkb"));
      assert(!test_file(ctx, "keymaps/syntax-error2.xkb"));
      assert(!test_file(ctx, "does not exist"));
  
      /* Test response to invalid flags and formats. */
      fclose(stdin);
      assert(!xkb_keymap_new_from_file(ctx, NULL, XKB_KEYMAP_FORMAT_TEXT_V1, 0));
      assert(!xkb_keymap_new_from_file(ctx, stdin, 0, 0));
      assert(!xkb_keymap_new_from_file(ctx, stdin, XKB_KEYMAP_USE_ORIGINAL_FORMAT, 0));
      assert(!xkb_keymap_new_from_file(ctx, stdin, 1234, 0));
      assert(!xkb_keymap_new_from_file(ctx, stdin, XKB_KEYMAP_FORMAT_TEXT_V1, -1));
      assert(!xkb_keymap_new_from_file(ctx, stdin, XKB_KEYMAP_FORMAT_TEXT_V1, 1234));
  
      xkb_context_unref(ctx);
  
      return 0;
  }
  

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