Plan 9 from Bell Labs’s /usr/web/sources/contrib/anothy/src/lib/djb-ape/byte/byte_chr.c

Copyright © 2021 Plan 9 Foundation.
Distributed under the MIT License.
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#include "byte.h"

unsigned int byte_chr(const char* s,register unsigned int n,int c)
{
  register char ch;
  register const char *t;

  ch = c;
  t = s;
  for (;;) {
    if (!n) break; if (*t == ch) break; ++t; --n;
    if (!n) break; if (*t == ch) break; ++t; --n;
    if (!n) break; if (*t == ch) break; ++t; --n;
    if (!n) break; if (*t == ch) break; ++t; --n;
  }
  return t - s;
}

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