kc3-lang/libxkbcommon/src/compose/table.c

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• Hash : b4e81ca1
  Author :
  Date : 2022-12-16T01:26:25
  

  context: add XKB_CONTEXT_NO_SECURE_GETENV flag (#312) This flag is useful for clients that may have relatively benign capabilities set, like CAP_SYS_NICE, that also want to use the xkb configuration from the environment and user configs in XDG_CONFIG_HOME. Fixes: https://github.com/xkbcommon/libxkbcommon/issues/308 Fixes: https://github.com/xkbcommon/libxkbcommon/issues/129 Signed-off-by: Ran Benita <ran@unusedvar.com>

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• src/compose/table.c

• /*
   * Copyright © 2013,2021 Ran Benita <ran234@gmail.com>
   *
   * 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 "utils.h"
  #include "table.h"
  #include "parser.h"
  #include "paths.h"
  
  static struct xkb_compose_table *
  xkb_compose_table_new(struct xkb_context *ctx,
                        const char *locale,
                        enum xkb_compose_format format,
                        enum xkb_compose_compile_flags flags)
  {
      char *resolved_locale;
      struct xkb_compose_table *table;
      struct compose_node dummy;
  
      resolved_locale = resolve_locale(ctx, locale);
      if (!resolved_locale)
          return NULL;
  
      table = calloc(1, sizeof(*table));
      if (!table) {
          free(resolved_locale);
          return NULL;
      }
  
      table->refcnt = 1;
      table->ctx = xkb_context_ref(ctx);
  
      table->locale = resolved_locale;
      table->format = format;
      table->flags = flags;
  
      darray_init(table->nodes);
      darray_init(table->utf8);
  
      dummy.keysym = XKB_KEY_NoSymbol;
      dummy.leaf.is_leaf = true;
      dummy.leaf.utf8 = 0;
      dummy.leaf.keysym = XKB_KEY_NoSymbol;
      darray_append(table->nodes, dummy);
  
      darray_append(table->utf8, '\0');
  
      return table;
  }
  
  XKB_EXPORT struct xkb_compose_table *
  xkb_compose_table_ref(struct xkb_compose_table *table)
  {
      table->refcnt++;
      return table;
  }
  
  XKB_EXPORT void
  xkb_compose_table_unref(struct xkb_compose_table *table)
  {
      if (!table || --table->refcnt > 0)
          return;
      free(table->locale);
      darray_free(table->nodes);
      darray_free(table->utf8);
      xkb_context_unref(table->ctx);
      free(table);
  }
  
  XKB_EXPORT struct xkb_compose_table *
  xkb_compose_table_new_from_file(struct xkb_context *ctx,
                                  FILE *file,
                                  const char *locale,
                                  enum xkb_compose_format format,
                                  enum xkb_compose_compile_flags flags)
  {
      struct xkb_compose_table *table;
      bool ok;
  
      if (flags & ~(XKB_COMPOSE_COMPILE_NO_FLAGS)) {
          log_err_func(ctx, "unrecognized flags: %#x\n", flags);
          return NULL;
      }
  
      if (format != XKB_COMPOSE_FORMAT_TEXT_V1) {
          log_err_func(ctx, "unsupported compose format: %d\n", format);
          return NULL;
      }
  
      table = xkb_compose_table_new(ctx, locale, format, flags);
      if (!table)
          return NULL;
  
      ok = parse_file(table, file, "(unknown file)");
      if (!ok) {
          xkb_compose_table_unref(table);
          return NULL;
      }
  
      return table;
  }
  
  XKB_EXPORT struct xkb_compose_table *
  xkb_compose_table_new_from_buffer(struct xkb_context *ctx,
                                    const char *buffer, size_t length,
                                    const char *locale,
                                    enum xkb_compose_format format,
                                    enum xkb_compose_compile_flags flags)
  {
      struct xkb_compose_table *table;
      bool ok;
  
      if (flags & ~(XKB_COMPOSE_COMPILE_NO_FLAGS)) {
          log_err_func(ctx, "unrecognized flags: %#x\n", flags);
          return NULL;
      }
  
      if (format != XKB_COMPOSE_FORMAT_TEXT_V1) {
          log_err_func(ctx, "unsupported compose format: %d\n", format);
          return NULL;
      }
  
      table = xkb_compose_table_new(ctx, locale, format, flags);
      if (!table)
          return NULL;
  
      ok = parse_string(table, buffer, length, "(input string)");
      if (!ok) {
          xkb_compose_table_unref(table);
          return NULL;
      }
  
      return table;
  }
  
  XKB_EXPORT struct xkb_compose_table *
  xkb_compose_table_new_from_locale(struct xkb_context *ctx,
                                    const char *locale,
                                    enum xkb_compose_compile_flags flags)
  {
      struct xkb_compose_table *table;
      char *path;
      FILE *file;
      bool ok;
  
      if (flags & ~(XKB_COMPOSE_COMPILE_NO_FLAGS)) {
          log_err_func(ctx, "unrecognized flags: %#x\n", flags);
          return NULL;
      }
  
      table = xkb_compose_table_new(ctx, locale, XKB_COMPOSE_FORMAT_TEXT_V1,
                                    flags);
      if (!table)
          return NULL;
  
      path = get_xcomposefile_path(ctx);
      if (path) {
          file = fopen(path, "rb");
          if (file)
              goto found_path;
      }
      free(path);
  
      path = get_xdg_xcompose_file_path(ctx);
      if (path) {
          file = fopen(path, "rb");
          if (file)
              goto found_path;
      }
      free(path);
  
      path = get_home_xcompose_file_path(ctx);
      if (path) {
          file = fopen(path, "rb");
          if (file)
              goto found_path;
      }
      free(path);
  
      path = get_locale_compose_file_path(ctx, table->locale);
      if (path) {
          file = fopen(path, "rb");
          if (file)
              goto found_path;
      }
      free(path);
  
      log_err(ctx, "couldn't find a Compose file for locale \"%s\" (mapped to \"%s\")\n",
              locale, table->locale);
      xkb_compose_table_unref(table);
      return NULL;
  
  found_path:
      ok = parse_file(table, file, path);
      fclose(file);
      if (!ok) {
          free(path);
          xkb_compose_table_unref(table);
          return NULL;
      }
  
      log_dbg(ctx, "created compose table from locale %s with path %s\n",
              table->locale, path);
  
      free(path);
      return table;
  }
  

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