kc3-lang/libxkbcommon/test/buffercomp.c

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• Author : Peter Hutterer
  Date : 2023-05-02 14:15:55
  Hash : b06aedb8
  Message : scanner: allow for a zero terminated string as keymap As the documentation for xkb_keymap_new_from_buffer() states, the "input string does not have to be zero-terminated". The actual implementation however failed with "unrecognized token/syntax error" when it encountered a null byte. Fix this by allowing a null byte at the last position of the buffer. Anything else is likely a client error anyway. Fixes #307

• test/buffercomp.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 <assert.h>
  #include <stdio.h>
  #include <stdlib.h>
  
  #include "test.h"
  
  #define DATA_PATH "keymaps/stringcomp.data"
  
  int
  main(int argc, char *argv[])
  {
      struct xkb_context *ctx = test_get_context(0);
      struct xkb_keymap *keymap;
      char *original, *dump;
  
      assert(ctx);
  
      /* Load in a prebuilt keymap, make sure we can compile it from memory,
       * then compare it to make sure we get the same result when dumping it
       * to a string. */
      original = test_read_file(DATA_PATH);
      assert(original);
  
      /* Load a prebuild keymap, once without, once with the trailing \0 */
      for (int i = 0; i <= 1; i++) {
          keymap = test_compile_buffer(ctx, original, strlen(original) + i);
          assert(keymap);
  
          dump = xkb_keymap_get_as_string(keymap, XKB_KEYMAP_USE_ORIGINAL_FORMAT);
          assert(dump);
  
          if (!streq(original, dump)) {
              fprintf(stderr,
                      "round-trip test failed: dumped map differs from original\n");
              fprintf(stderr, "path to original file: %s\n",
                      test_get_path(DATA_PATH));
              fprintf(stderr, "length: dumped %lu, original %lu\n",
                      (unsigned long) strlen(dump),
                      (unsigned long) strlen(original));
              fprintf(stderr, "dumped map:\n");
              fprintf(stderr, "%s\n", dump);
              fflush(stderr);
              assert(0);
          }
  
          free(dump);
          xkb_keymap_unref(keymap);
      }
  
      free(original);
  
      /* Make sure we can't (falsely claim to) compile an empty string. */
      keymap = test_compile_buffer(ctx, "", 0);
      assert(!keymap);
  
      /* Make sure we can recompile our output for a normal keymap from rules. */
      keymap = test_compile_rules(ctx, NULL, NULL,
                                  "ru,ca,de,us", ",multix,neo,intl", NULL);
      assert(keymap);
      dump = xkb_keymap_get_as_string(keymap, XKB_KEYMAP_USE_ORIGINAL_FORMAT);
      assert(dump);
      xkb_keymap_unref(keymap);
      keymap = test_compile_buffer(ctx, dump, strlen(dump));
      assert(keymap);
      xkb_keymap_unref(keymap);
      free(dump);
  
      xkb_context_unref(ctx);
  
      return 0;
  }