Mercurial > dovecot > core-2.2
view src/lib/bits.c @ 22713:cb108f786fb4
Updated copyright notices to include the year 2018.
author | Stephan Bosch <stephan.bosch@dovecot.fi> |
---|---|
date | Mon, 01 Jan 2018 22:42:08 +0100 |
parents | 7f042673da58 |
children |
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/* Copyright (c) 2001-2018 Dovecot authors, see the included COPYING file */ #include "lib.h" size_t nearest_power(size_t num) { size_t n = 1; i_assert(num <= ((size_t)1 << (CHAR_BIT*sizeof(size_t) - 1))); while (n < num) n <<= 1; return n; } #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) /* Lucky you, it's all inline intrinsics */ #else unsigned int bits_required8(uint8_t num) { int ret = 0; if (num > 0xf) { ret += 4; num >>= 4; } if (num > 0x3) { ret += 2; num >>= 2; } num &= ~(num>>1); /* 3->2, else unchanged */ return ret + num; } #endif