X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=turbopfor-encode.h;h=24e007cdc070e902bb9ea4b250b9d8bbb1d33505;hb=894e2278390c1f9d3bf4246685554246abfc0600;hp=9341efc0b7f4c23552f29dbd115bac508eb6cc1d;hpb=8c40d71acb262d9efe84af89e28a448bddadbabe;p=plocate

diff --git a/turbopfor-encode.h b/turbopfor-encode.h
index 9341efc..24e007c 100644
--- a/turbopfor-encode.h
+++ b/turbopfor-encode.h
@@ -15,6 +15,9 @@
 
 #include <algorithm>
 #include <assert.h>
+#ifdef HAS_ENDIAN_H
+#include <endian.h>
+#endif
 #include <limits.h>
 #include <stdint.h>
 #include <string.h>
@@ -94,11 +97,20 @@ unsigned char *write_vb(Docid val, unsigned char *out)
 template<class Docid>
 inline unsigned num_bits(Docid x)
 {
+#ifdef __GNUC__
 	if (x == 0) {
 		return 0;
 	} else {
 		return sizeof(Docid) * CHAR_BIT - __builtin_clz(x);
 	}
+#else
+	for (int i = sizeof(Docid) * CHAR_BIT; i-- > 0;) {
+		if (x & (Docid{ 1 } << i)) {
+			return i;
+		}
+	}
+	return 0;
+#endif
 }
 
 struct BitWriter {