chromium/third_party/utf/src/runetype/runetypebody.h

#include <stdlib.h>

#define LEN(X) …

int ISRUNE(Rune r) { … }

#ifdef TORUNE
Rune TORUNE(Rune r) {
  Rune* match;

#ifdef RANGES
  if ((match = bsearch(&r, RANGES, LEN(RANGES), sizeof *RANGES, rune2cmp)))
    return match[2] + (r - match[0]);
#endif
#ifdef LACES1
  if ((match = bsearch(&r, LACES1, LEN(LACES1), sizeof *LACES1, rune2cmp)))
    return ((r - match[0]) % 2) ? r : r + 1;
#endif
#ifdef LACES2
  if ((match = bsearch(&r, LACES2, LEN(LACES2), sizeof *LACES2, rune2cmp)))
    return ((r - match[0]) % 2) ? r : r - 1;
#endif
#ifdef SINGLES
  if ((match = bsearch(&r, SINGLES, LEN(SINGLES), sizeof *SINGLES, rune1cmp)))
    return match[1];
#endif

  return r;
}
#endif