kc3-lang/libxkbcommon/src/keymap-formats.c

Branch : - branch - android master - tag -

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  Commit

• Author : Pierre Le Marre
  Date : 2025-05-06 16:23:04
  Hash : 08149dae
  Message : Add internal API to query and parse supported keymap formats

• src/keymap-formats.c

• /*
   * Copyright © 2025 Pierre Le Marre <dev@wismill.eu>
   *
   * SPDX-License-Identifier: MIT
   */
  
  #include "config.h"
  
  #include <string.h>
  
  #include "utils.h"
  #include "keymap-formats.h"
  
  /* [WARNING] Must be in ascending order */
  static const enum xkb_keymap_format keymap_formats[] = {
      XKB_KEYMAP_FORMAT_TEXT_V1,
      XKB_KEYMAP_FORMAT_TEXT_V2,
  };
  
  /*
   * Human-friendly formats labels
   *
   * They are aimed to be used in the CLI tools and to be *stable*. While the
   * current labels are simply “v” + corresponding `xkb_keymap_format` values, it
   * may change in the future. Indeed, `xkb_keymap_format` encoding may change
   * (although we avoit it) while the corresponding labels remain unchanged.
   */
  struct format_label {
      const char* label;
      enum xkb_keymap_format format;
  };
  static const struct format_label keymap_formats_labels [] = {
      { "v1", XKB_KEYMAP_FORMAT_TEXT_V1 },
      { "v2", XKB_KEYMAP_FORMAT_TEXT_V2 },
  };
  
  size_t
  xkb_keymap_supported_formats(const enum xkb_keymap_format **formats)
  {
      *formats = keymap_formats;
      return ARRAY_SIZE(keymap_formats);
  }
  
  bool
  xkb_keymap_is_supported_format(enum xkb_keymap_format format)
  {
      for (size_t k = 0; k < ARRAY_SIZE(keymap_formats); k++) {
          if (keymap_formats[k] == format)
              return true;
          /* Short-circuit because array is sorted */
          if (keymap_formats[k] > format)
              return false;
      }
      return false;
  }
  
  enum xkb_keymap_format
  xkb_keymap_parse_format(const char *raw)
  {
      if (!raw)
          return 0;
  
      if (raw[0] != 'v') {
          /* Parse numeric format */
          const int format = atoi(raw);
          return (xkb_keymap_is_supported_format(format)) ? format : 0;
      } else {
          /* Parse format label: “vXXX” */
          for (size_t k = 0; k < ARRAY_SIZE(keymap_formats_labels); k++) {
              if (strcmp(raw, keymap_formats_labels[k].label) == 0)
                  return keymap_formats_labels[k].format;
          }
          return 0;
      }
  }