kc3-lang/libxkbcommon/src/xkbcomp/vmod.c

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• Hash : c0065c95
  Author :
  Date : 2023-09-21T20:06:27
  

  Messages: merge macros with and without message code Previously we had two types of macros for logging: with and without message code. They were intended to be merged afterwards. The idea is to use a special code – `XKB_LOG_MESSAGE_NO_ID = 0` – that should *not* be displayed. But we would like to avoid checking this special code at run time. This is achieved using macro tricks; they are detailed in the code (see: `PREPEND_MESSAGE_ID`). Now it is also easier to spot the remaining undocumented log entries: just search `XKB_LOG_MESSAGE_NO_ID`.

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• src/xkbcomp/vmod.c

• /************************************************************
   * Copyright (c) 1994 by Silicon Graphics Computer Systems, Inc.
   *
   * Permission to use, copy, modify, and distribute this
   * software and its documentation for any purpose and without
   * fee is hereby granted, provided that the above copyright
   * notice appear in all copies and that both that copyright
   * notice and this permission notice appear in supporting
   * documentation, and that the name of Silicon Graphics not be
   * used in advertising or publicity pertaining to distribution
   * of the software without specific prior written permission.
   * Silicon Graphics makes no representation about the suitability
   * of this software for any purpose. It is provided "as is"
   * without any express or implied warranty.
   *
   * SILICON GRAPHICS DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS
   * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
   * AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
   * GRAPHICS BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
   * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
   * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
   * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION  WITH
   * THE USE OR PERFORMANCE OF THIS SOFTWARE.
   *
   ********************************************************/
  
  #include "config.h"
  
  #include "xkbcomp-priv.h"
  #include "text.h"
  #include "expr.h"
  #include "vmod.h"
  
  bool
  HandleVModDef(struct xkb_context *ctx, struct xkb_mod_set *mods,
                VModDef *stmt, enum merge_mode merge)
  {
      xkb_mod_index_t i;
      struct xkb_mod *mod;
      xkb_mod_mask_t mapping;
  
      merge = (merge == MERGE_DEFAULT ? stmt->merge : merge);
  
      if (stmt->value) {
          /*
           * This is a statement such as 'virtualModifiers NumLock = Mod1';
           * it sets the vmod-to-real-mod[s] mapping directly instead of going
           * through modifier_map or some such.
           */
          if (!ExprResolveModMask(ctx, stmt->value, MOD_REAL, mods, &mapping)) {
              log_err(ctx, XKB_LOG_MESSAGE_NO_ID,
                      "Declaration of %s ignored\n",
                      xkb_atom_text(ctx, stmt->name));
              return false;
          }
      }
      else {
          mapping = 0;
      }
  
      xkb_mods_enumerate(i, mod, mods) {
          if (mod->name == stmt->name) {
              if (mod->type != MOD_VIRT) {
                  log_err(ctx, XKB_LOG_MESSAGE_NO_ID,
                          "Can't add a virtual modifier named \"%s\"; "
                          "there is already a non-virtual modifier with this name! Ignored\n",
                          xkb_atom_text(ctx, mod->name));
                  return false;
              }
  
              if (mod->mapping == mapping)
                  return true;
  
              if (mod->mapping != 0) {
                  xkb_mod_mask_t use, ignore;
  
                  use = (merge == MERGE_OVERRIDE ? mapping : mod->mapping);
                  ignore = (merge == MERGE_OVERRIDE ? mod->mapping : mapping);
  
                  log_warn(ctx, XKB_LOG_MESSAGE_NO_ID,
                           "Virtual modifier %s defined multiple times; "
                           "Using %s, ignoring %s\n",
                           xkb_atom_text(ctx, stmt->name),
                           ModMaskText(ctx, mods, use),
                           ModMaskText(ctx, mods, ignore));
  
                  mapping = use;
              }
  
              mod->mapping = mapping;
              return true;
          }
      }
  
      if (mods->num_mods >= XKB_MAX_MODS) {
          log_err(ctx, XKB_LOG_MESSAGE_NO_ID,
                  "Too many modifiers defined (maximum %d)\n",
                  XKB_MAX_MODS);
          return false;
      }
  
      mods->mods[mods->num_mods].name = stmt->name;
      mods->mods[mods->num_mods].type = MOD_VIRT;
      mods->mods[mods->num_mods].mapping = mapping;
      mods->num_mods++;
      return true;
  }
  

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