libswitchhw: add function to display binary patterns

5c48e158 · Benoit Rat · 612a766c · 5c48e158 · 5c48e158
Commit 5c48e158 authored Jan 28, 2013 by Benoit Rat
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util.h userspace/include/util.h +1 -0

util.c userspace/libswitchhw/util.c +18 -0

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--- a/userspace/include/util.h
+++ b/userspace/include/util.h
@@ -9,5 +9,6 @@
 void shw_udelay(uint32_t microseconds);
 void *shw_malloc(size_t nbytes);
 void shw_free(void *ptr);
+const char *shw_2binary(uint8_t x);

 #endif
--- a/userspace/libswitchhw/util.c
+++ b/userspace/libswitchhw/util.c
@@ -45,3 +45,21 @@ uint64_t shw_get_tics()
  gettimeofday(&tv, &tz);
  return (uint64_t)tv.tv_usec + (uint64_t)tv.tv_sec * 1000000ULL;
 }
+
+
+
+const char *shw_2binary(uint8_t x)
+{
+    static char b[9];
+    int z;
+    char *p=b;
+
+    for (z=0x80; z > 0; z >>= 1)
+    {
+       *p++=(((x & z) == z) ? '1' : '0');
+    }
+    *p='\0';
+
+    return b;
+}
+