From 3e502bfe3df65f64a592e86354a82882eca1f83a Mon Sep 17 00:00:00 2001
From: wes <wjak56@gmail.com>
Date: Wed, 5 Jul 2017 12:49:30 -0400
Subject: [PATCH] add set and clear functions

---
 .bfilter.c.swp | Bin 12288 -> 0 bytes
 .bfilter.h.swp | Bin 12288 -> 0 bytes
 .gitignore     |   1 +
 bfilter.c      |  19 +++++++++++++++++++
 bfilter.h      |   1 +
 5 files changed, 21 insertions(+)
 delete mode 100644 .bfilter.c.swp
 delete mode 100644 .bfilter.h.swp

diff --git a/.bfilter.c.swp b/.bfilter.c.swp
deleted file mode 100644
index cefa3fc2c552c7bb628c22d428b3486bb1b92e25..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 12288
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diff --git a/.bfilter.h.swp b/.bfilter.h.swp
deleted file mode 100644
index d7d59f78ed677f6ebd629a11313bd94a88cca794..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

literal 12288
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z;N%UsJBjZpEvQR{PL=n-o73~1pM(c8godT+&aRe=B|)1O>3kj?ZoP%x_MAx5WUe}}
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z6rcbFC_n)UP=Epy7%2gpcyfy;9_u~zWUu#r^}QiG3Q&Lo6rcbFC_n)UP=Epypa2C%
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BThIUi

diff --git a/.gitignore b/.gitignore
index 9daeafb..05debe1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 test
+*swp
diff --git a/bfilter.c b/bfilter.c
index 85f9661..308e7bc 100644
--- a/bfilter.c
+++ b/bfilter.c
@@ -40,6 +40,7 @@ printbits(int n) {
 int*
 new_bitarray(int size) {
   int *barray = malloc((sizeof (int)) * size);
+
   int i;
   for(i = 0; i < size; i++) {
     barray[i] = 0;
@@ -65,12 +66,30 @@ setbit(int* arr, int k) {
   return 0;
 }
 
+int
+unsetbit(int* arr, int k) {
+  int i = k/32;
+
+  int pos = k % 32;
+
+  unsigned int flag = 1;
+
+  flag = ~(flag << pos);
+
+  arr[i] = arr[i] & flag;
+
+  return 0;
+}
+
 int
 main (void) {
   int *test = new_bitarray(5);
   setbit(test, 6);
   setbit(test, 4);
   setbit(test, 2);
+  unsetbit(test, 6);
+  unsetbit(test, 4);
+  unsetbit(test, 2);
   printbits(test[0]);
   return EXIT_SUCCESS;
 }
diff --git a/bfilter.h b/bfilter.h
index a244beb..2b1880b 100644
--- a/bfilter.h
+++ b/bfilter.h
@@ -12,3 +12,4 @@ int printbits(int);
 int *new_bitarray(int);
 
 int setbit(int*, int);
+int unsetbit(int*, int);