From 94b4fba6e6afa6d7d68051a1ceb6987bb6002ccd Mon Sep 17 00:00:00 2001 From: tmk Date: Sat, 24 Nov 2012 16:34:59 +0900 Subject: Add bitpop16() in util.c. --- common/util.c | 10 +++++++++- common/util.h | 3 ++- 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/common/util.c b/common/util.c index 644301fe89..9d8fb93219 100644 --- a/common/util.c +++ b/common/util.c @@ -22,7 +22,7 @@ uint8_t bitpop(uint8_t bits) { uint8_t c; for (c = 0; bits; c++) - bits &= bits -1; + bits &= bits - 1; return c; /* const uint8_t bit_count[] = { 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4 }; @@ -30,6 +30,14 @@ uint8_t bitpop(uint8_t bits) */ } +uint8_t bitpop16(uint16_t bits) +{ + uint8_t c; + for (c = 0; bits; c++) + bits &= bits - 1; + return c; +} + // most significant on-bit - return highest location of on-bit uint8_t biton(uint8_t bits) { diff --git a/common/util.h b/common/util.h index 87636c9710..c3734487f9 100644 --- a/common/util.h +++ b/common/util.h @@ -16,7 +16,7 @@ along with this program. If not, see . */ #ifndef UTIL_H -#define UTIL_H 1 +#define UTIL_H #include @@ -29,6 +29,7 @@ along with this program. If not, see . uint8_t bitpop(uint8_t bits); +uint8_t bitpop16(uint16_t bits); uint8_t biton(uint8_t bits); #endif -- cgit v1.2.1