cpp/openttd-patchpack/source Changeset - r7982:bd7f4c5a45b3

Changeset - r7982:bd7f4c5a45b3

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skidd13 - 17 years ago 2007-11-28 21:59:06
skidd13@openttd.org

(svn r11538) -Codechange: Rewrite GetNthSetBit in a more uncontroversial way and add its documentation

1 file changed with 13 insertions and 6 deletions:

src/town_gui.cpp

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src/town_gui.cpp

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@@ @@ -109,15 +109,22 @@ uint GetMaskOfTownActions(int *nump, Pla @@
 	return buttons;
+}
 /**
  * Get the position of the Nth set bit.
+ *
  * If there is no Nth bit set return -1
+ *
  * @param bits The value to search in
  * @param n The Nth set bit from which we want to know the position
  * @return The position of the Nth set bit
  */
 static int GetNthSetBit(uint32 bits, int n)
+{
 	int i = 0;
 	if (n >= 0) {
 		do {
 			if (bits & 1 && --n < 0) return i;
 			i++;
 		} while (bits >>= 1);
 		for (uint i = 0; bits != 0; bits >>= 1, i++) {
 			if (bits & 1) n--;
 			if (n < 0) return i;
+		}
+	}
 	return -1;
+}

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