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-rw-r--r--src/lib/primes.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/src/lib/primes.h b/src/lib/primes.h
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+++ b/src/lib/primes.h
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+#ifndef PRIMES_H
+#define PRIMES_H
+
+/* Returns a prime close to specified number, or the number itself if it's
+ a prime. Note that the returned value may be smaller than requested! */
+unsigned int primes_closest(unsigned int num) ATTR_CONST;
+
+#endif