1 files changed, 90 insertions, 0 deletions
diff --git a/intl/icu/source/common/emojiprops.h b/intl/icu/source/common/emojiprops.h
new file mode 100644
index 0000000000..777b7b11a8
--- /dev/null
+++ b/intl/icu/source/common/emojiprops.h
@@ -0,0 +1,90 @@
+// © 2021 and later: Unicode, Inc. and others.
+// License & terms of use: https://www.unicode.org/copyright.html
+
+// emojiprops.h
+// created: 2021sep03 Markus W. Scherer
+
+#ifndef __EMOJIPROPS_H__
+#define __EMOJIPROPS_H__
+
+#include "unicode/utypes.h"
+#include "unicode/ucptrie.h"
+#include "unicode/udata.h"
+#include "unicode/uobject.h"
+#include "uset_imp.h"
+
+U_NAMESPACE_BEGIN
+
+class EmojiProps : public UMemory {
+public:
+    // @internal
+    EmojiProps(UErrorCode &errorCode) { load(errorCode); }
+    ~EmojiProps();
+
+    static const EmojiProps *getSingleton(UErrorCode &errorCode);
+    static UBool hasBinaryProperty(UChar32 c, UProperty which);
+    static UBool hasBinaryProperty(const char16_t *s, int32_t length, UProperty which);
+
+    void addPropertyStarts(const USetAdder *sa, UErrorCode &errorCode) const;
+    void addStrings(const USetAdder *sa, UProperty which, UErrorCode &errorCode) const;
+
+    enum {
+        // Byte offsets from the start of the data, after the generic header,
+        // in ascending order.
+        // UCPTrie=CodePointTrie, follows the indexes
+        IX_CPTRIE_OFFSET,
+        IX_RESERVED1,
+        IX_RESERVED2,
+        IX_RESERVED3,
+
+        // UCharsTrie=CharsTrie
+        IX_BASIC_EMOJI_TRIE_OFFSET,
+        IX_EMOJI_KEYCAP_SEQUENCE_TRIE_OFFSET,
+        IX_RGI_EMOJI_MODIFIER_SEQUENCE_TRIE_OFFSET,
+        IX_RGI_EMOJI_FLAG_SEQUENCE_TRIE_OFFSET,
+        IX_RGI_EMOJI_TAG_SEQUENCE_TRIE_OFFSET,
+        IX_RGI_EMOJI_ZWJ_SEQUENCE_TRIE_OFFSET,
+        IX_RESERVED10,
+        IX_RESERVED11,
+        IX_RESERVED12,
+        IX_TOTAL_SIZE,
+
+        // Not initially byte offsets.
+        IX_RESERVED14,
+        IX_RESERVED15,
+        IX_COUNT  // 16
+    };
+
+    // Properties in the code point trie.
+    enum {
+        // https://www.unicode.org/reports/tr51/#Emoji_Properties
+        BIT_EMOJI,
+        BIT_EMOJI_PRESENTATION,
+        BIT_EMOJI_MODIFIER,
+        BIT_EMOJI_MODIFIER_BASE,
+        BIT_EMOJI_COMPONENT,
+        BIT_EXTENDED_PICTOGRAPHIC,
+        // https://www.unicode.org/reports/tr51/#Emoji_Sets
+        BIT_BASIC_EMOJI
+    };
+
+private:
+    static UBool U_CALLCONV
+    isAcceptable(void *context, const char *type, const char *name, const UDataInfo *pInfo);
+    /** Input i: One of the IX_..._TRIE_OFFSET indexes into the data file indexes[] array. */
+    static int32_t getStringTrieIndex(int32_t i) {
+        return i - IX_BASIC_EMOJI_TRIE_OFFSET;
+    }
+
+    void load(UErrorCode &errorCode);
+    UBool hasBinaryPropertyImpl(UChar32 c, UProperty which) const;
+    UBool hasBinaryPropertyImpl(const char16_t *s, int32_t length, UProperty which) const;
+
+    UDataMemory *memory = nullptr;
+    UCPTrie *cpTrie = nullptr;
+    const char16_t *stringTries[6] = { nullptr, nullptr, nullptr, nullptr, nullptr, nullptr };
+};
+
+U_NAMESPACE_END
+
+#endif  // __EMOJIPROPS_H__