Initial import

1 files changed, 28 insertions, 0 deletions

diff --git a/common.h b/common.h
new file mode 100644
index 0000000..8181c42
--- /dev/null
+++ b/common.h
@@ -0,0 +1,28 @@
+#ifndef common_H
+#define common_H 1
+
+#define LOAD32_LE(SRC) load32_le(SRC)
+static inline uint32_t
+load32_le(const uint8_t src[4])
+{
+    uint32_t w = (uint32_t) src[0];
+    w |= (uint32_t) src[1] << 8;
+    w |= (uint32_t) src[2] << 16;
+    w |= (uint32_t) src[3] << 24;
+    return w;
+}
+
+#define STORE32_LE(DST, W) store32_le((DST), (W))
+static inline void
+store32_le(uint8_t dst[4], uint32_t w)
+{
+    dst[0] = (uint8_t) w;
+    w >>= 8;
+    dst[1] = (uint8_t) w;
+    w >>= 8;
+    dst[2] = (uint8_t) w;
+    w >>= 8;
+    dst[3] = (uint8_t) w;
+}
+
+#endif