1 files changed, 56 insertions, 0 deletions
diff --git a/include/wsap_vtcore/unicode/width.h b/include/wsap_vtcore/unicode/width.h
new file mode 100644
index 0000000..21d8252
--- /dev/null
+++ b/include/wsap_vtcore/unicode/width.h
@@ -0,0 +1,56 @@
+#ifndef WSAP_VTCORE_UNICODE_WIDTH_H
+#define WSAP_VTCORE_UNICODE_WIDTH_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+struct wsap_vtcore_unicode_range { uint32_t lo, hi; };
+
+#include "unicode_data.inc"
+
+static inline bool wsap_vtcore_in_ranges(const struct wsap_vtcore_unicode_range *ranges, size_t count, uint32_t cp)
+{
+    if (count == 0 || cp < ranges[0].lo || cp > ranges[count - 1].hi)
+        return false;
+    const struct wsap_vtcore_unicode_range *base = ranges;
+    size_t n = count;
+    while (n > 1) {
+        size_t half = n / 2;
+        base = (base[half].lo <= cp) ? base + half : base;
+        n -= half;
+    }
+    return cp <= base->hi;
+}
+
+#define WSAP_VTCORE_IN_TABLE(table, cp) wsap_vtcore_in_ranges(table, sizeof(table) / sizeof(table[0]), cp)
+
+static inline int wsap_vtcore_unicode_width(uint32_t cp)
+{
+    if (cp > 0x10FFFF || WSAP_VTCORE_IN_TABLE(wsap_vtcore_nonprintable, cp))
+        return -1;
+    if (WSAP_VTCORE_IN_TABLE(wsap_vtcore_zero_width, cp))
+        return 0;
+    return WSAP_VTCORE_IN_TABLE(wsap_vtcore_unicode_wide, cp) ? 2 : 1;
+}
+
+static inline bool wsap_vtcore_unicode_extended_pictographic(uint32_t cp)
+{
+    return WSAP_VTCORE_IN_TABLE(wsap_vtcore_extended_pictographic, cp);
+}
+
+static inline bool wsap_vtcore_unicode_emoji_presentation(uint32_t cp)
+{
+    return WSAP_VTCORE_IN_TABLE(wsap_vtcore_emoji_presentation, cp);
+}
+
+static inline bool wsap_vtcore_unicode_spacing_mark(uint32_t cp)
+{
+    if (cp < 0x903 || ((cp - 0xABEDu) < (0x11000u - 0xABEDu)) || cp > 0x1D281)
+        return false;
+    return WSAP_VTCORE_IN_TABLE(wsap_vtcore_spacing_mark, cp);
+}
+
+#undef WSAP_VTCORE_IN_TABLE
+
+#endif