Split code out into separate compilation units (first pass, anyway).

bitset.h

@@ -0,0 +1,39 @@
+#ifndef __BITSET_H
+#define __BITSET_H
+
+#include <string.h>
+
+static inline char char_with_bit_set(int num) {
+	return 1<<(num%8);
+}
+static inline int bit_is_set(char* b, int idx) {
+	return (b[idx/8] & char_with_bit_set(idx)) != 0;
+}
+static inline int bit_is_clear(char* b, int idx) {
+	return !bit_is_set(b, idx);
+}
+static inline void bit_set(char* b, int idx) {
+	b[idx/8] &= char_with_bit_set(idx);
+}
+static inline void bit_clear(char* b, int idx) {
+	b[idx/8] &= ~char_with_bit_set(idx);
+}
+static inline void bit_set_range(char* b, int from, int len) {
+	for (; from%8 != 0 && len > 0; len--)
+		bit_set(b, from++);
+	if (len >= 8)
+		memset(b+(from/8), 255, len/8);
+	for (; len > 0; len--)
+		bit_set(b, from++);
+}
+static inline void bit_clear_range(char* b, int from, int len) {
+	for (; from%8 != 0 && len > 0; len--)
+		bit_clear(b, from++);
+	if (len >= 8)
+		memset(b+(from/8), 0, len/8);
+	for (; len > 0; len--)
+		bit_clear(b, from++);
+}
+
+#endif
+