X-Git-Url: https://git.friedersdorff.com/?a=blobdiff_plain;f=common%2Futil.c;h=6d4d6bfda1801550c68e3d04c8a37d214a45f8c5;hb=a8c465215fce3dad502da868ca49eb446deadc4e;hp=ff1926d7d14e0c58cb35249ebd5f03b430b7cfbf;hpb=38bbe976e00a9a7bf6f8157016717e80503bf6a9;p=max%2Ftmk_keyboard.git

diff --git a/common/util.c b/common/util.c
index ff1926d7..6d4d6bfd 100644
--- a/common/util.c
+++ b/common/util.c
@@ -38,6 +38,14 @@ uint8_t bitpop16(uint16_t bits)
     return c;
 }
 
+uint8_t bitpop32(uint32_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
 // NOTE: return 0 when bit0 is on or all bits are off
 uint8_t biton(uint8_t bits)
@@ -58,3 +66,14 @@ uint8_t biton16(uint16_t bits)
     if (bits >> 1) { bits >>= 1; n += 1;}
     return n;
 }
+
+uint8_t biton32(uint32_t bits)
+{
+    uint8_t n = 0;
+    if (bits >>16) { bits >>=16; n +=16;}
+    if (bits >> 8) { bits >>= 8; n += 8;}
+    if (bits >> 4) { bits >>= 4; n += 4;}
+    if (bits >> 2) { bits >>= 2; n += 2;}
+    if (bits >> 1) { bits >>= 1; n += 1;}
+    return n;
+}