Move utilities to util/

app/src/util/buffer_util.h

@@ -0,0 +1,46 @@
+#ifndef BUFFER_UTIL_H
+#define BUFFER_UTIL_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "config.h"
+
+static inline void
+buffer_write16be(uint8_t *buf, uint16_t value) {
+    buf[0] = value >> 8;
+    buf[1] = value;
+}
+
+static inline void
+buffer_write32be(uint8_t *buf, uint32_t value) {
+    buf[0] = value >> 24;
+    buf[1] = value >> 16;
+    buf[2] = value >> 8;
+    buf[3] = value;
+}
+
+static inline void
+buffer_write64be(uint8_t *buf, uint64_t value) {
+    buffer_write32be(buf, value >> 32);
+    buffer_write32be(&buf[4], (uint32_t) value);
+}
+
+static inline uint16_t
+buffer_read16be(const uint8_t *buf) {
+    return (buf[0] << 8) | buf[1];
+}
+
+static inline uint32_t
+buffer_read32be(const uint8_t *buf) {
+    return (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+}
+
+static inline
+uint64_t buffer_read64be(const uint8_t *buf) {
+    uint32_t msb = buffer_read32be(buf);
+    uint32_t lsb = buffer_read32be(&buf[4]);
+    return ((uint64_t) msb << 32) | lsb;
+}
+
+#endif