summaryrefslogtreecommitdiff
path: root/src/uint32p.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/uint32p.c')
-rw-r--r--src/uint32p.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/src/uint32p.c b/src/uint32p.c
new file mode 100644
index 0000000..f3f04ea
--- /dev/null
+++ b/src/uint32p.c
@@ -0,0 +1,47 @@
+#include "uint_t.h"
+
+/**
+ @file uint32p.c
+ @author djb
+ @source qmail
+ @brief packing/unpacking 32 bit integer to/from char string
+*/
+
+void uint32_pack(char s[4],uint32 u)
+{
+ s[0] = u & 255; u >>= 8;
+ s[1] = u & 255; u >>= 8;
+ s[2] = u & 255;
+ s[3] = u >> 8;
+}
+void uint32_pack_big(char s[4],uint32 u)
+{
+ s[3] = u & 255; u >>= 8;
+ s[2] = u & 255; u >>= 8;
+ s[1] = u & 255;
+ s[0] = u >> 8;
+}
+
+void uint32_unpack(char s[4],uint32 *u)
+{
+ uint32 result;
+
+ result = (unsigned char) s[3]; result <<= 8;
+ result += (unsigned char) s[2]; result <<= 8;
+ result += (unsigned char) s[1]; result <<= 8;
+ result += (unsigned char) s[0];
+
+ *u = result;
+}
+
+void uint32_unpack_big(char s[4],uint32 *u)
+{
+ uint32 result;
+
+ result = (unsigned char) s[0]; result <<= 8;
+ result += (unsigned char) s[1]; result <<= 8;
+ result += (unsigned char) s[2]; result <<= 8;
+ result += (unsigned char) s[3];
+
+ *u = result;
+}