--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Meerwald/signature.c	Sun Aug 12 13:14:34 2007 +0200
@@ -0,0 +1,95 @@
+#include "signature.h"
+
+void init_signature_bits() {
+  bzero(signature, sizeof(signature));
+}
+
+void init_signature1_bits() {
+  bzero(signature1, sizeof(signature1));
+}
+
+void init_signature2_bits() {
+  bzero(signature2, sizeof(signature2));
+}
+
+int get_signature_bit(int n) {
+  int byte = n >> 3;
+  int bit = n & 7;
+
+#ifdef DEBUG
+  if (byte < 0 || byte >= NSIGNATURE)
+    fprintf(stderr, "get_signature_bit(): index out of range\n");
+#endif
+
+  return (signature[byte] & (1 << bit)) >> bit;
+}
+
+int get_signature1_bit(int n) {
+  int byte = n >> 3;
+  int bit = n & 7;
+
+#ifdef DEBUG
+  if (byte < 0 || byte >= NSIGNATURE)
+    fprintf(stderr, "get_signature1_bit(): index out of range\n");
+#endif
+
+  return (signature1[byte] & (1 << bit)) >> bit;
+}
+
+int get_signature2_bit(int n) {
+  int byte = n >> 3;
+  int bit = n & 7;
+
+#ifdef DEBUG
+  if (byte < 0 || byte >= NSIGNATURE)
+    fprintf(stderr, "get_signature2_bit(): index out of range\n");
+#endif
+
+  return (signature2[byte] & (1 << bit)) >> bit;
+}
+
+void set_signature_bit(int n, int v) {
+  int byte = n >> 3;
+  int bit = n & 7;
+
+#ifdef DEBUG
+  if (byte < 0 || byte >= NSIGNATURE)
+    fprintf(stderr, "get_signature_bit(): index out of range\n");
+#endif
+
+  if (v)
+    signature[byte] |= (1 << bit);
+  else
+    signature[byte] &= ~(1 << bit);
+}
+
+void set_signature1_bit(int n, int v) {
+  int byte = n >> 3;
+  int bit = n & 7;
+
+#ifdef DEBUG
+  if (byte < 0 || byte >= NSIGNATURE)
+    fprintf(stderr, "get_signature1_bit(): index out of range\n");
+#endif
+
+  if (v)
+    signature1[byte] |= (1 << bit);
+  else
+    signature1[byte] &= ~(1 << bit);
+}
+
+void set_signature2_bit(int n, int v) {
+  int byte = n >> 3;
+  int bit = n & 7;
+
+#ifdef DEBUG
+  if (byte < 0 || byte >= NSIGNATURE)
+    fprintf(stderr, "get_signature2_bit(): index out of range\n");
+#endif
+
+  if (v)
+    signature2[byte] |= (1 << bit);
+  else
+    signature2[byte] &= ~(1 << bit);
+}
+