Merge pull request 'master' (#7) from grunfink/snac2:master into main

Reviewed-on: https://codeberg.org/byte/snac2/pulls/7

1 files changed, 8 insertions, 1 deletions

diff --git a/xs_unicode.h b/xs_unicode.h
index 67b3827..7686dcd 100644
--- a/xs_unicode.h
+++ b/xs_unicode.h
@@ -1,4 +1,4 @@
-/* copyright (c) 2022 - 2025 grunfink et al. / MIT license */
+/* copyright (c) 2022 - 2026 grunfink et al. / MIT license */
 
 #ifndef _XS_UNICODE_H
 
@@ -22,6 +22,7 @@
  int xs_unicode_nfc(unsigned int base, unsigned int diac, unsigned int *cpoint);
  int xs_unicode_is_alpha(unsigned int cpoint);
  int xs_unicode_is_right_to_left(unsigned int cpoint);
+ int xs_is_emoji(unsigned int cpoint);
 
 #ifdef _XS_H
  xs_str *xs_utf8_insert(xs_str *str, unsigned int cpoint, int *offset);
@@ -134,6 +135,12 @@ static unsigned int xs_unicode_width_table[] = {
     0x20000,    0x2fffd,    2       /* more CJK */
 };
 
+/* magic number from https://en.wikipedia.org/wiki/Emoji#Unicode_blocks */
+int xs_is_emoji(unsigned int cpoint) {
+/* returns wether the input is an utf8 emoji */
+    return cpoint > 0x00A9 && cpoint < 0x1ffff;
+}
+
 int xs_unicode_width(unsigned int cpoint)
 /* returns the width in columns of a Unicode codepoint (somewhat simplified) */
 {