Rename buffer_util.h to binary.h

It will allow to expose more binary util functions not related to
buffers.

PR #3369 <https://github.com/Genymobile/scrcpy/pull/3369>

app/src/util/binary.h

@@ -0,0 +1,46 @@
+#ifndef SC_BINARY_H
+#define SC_BINARY_H
+
+#include "common.h"
+
+#include <stdbool.h>
+#include <stdint.h>
+
+static inline void
+sc_write16be(uint8_t *buf, uint16_t value) {
+    buf[0] = value >> 8;
+    buf[1] = value;
+}
+
+static inline void
+sc_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
+sc_write64be(uint8_t *buf, uint64_t value) {
+    sc_write32be(buf, value >> 32);
+    sc_write32be(&buf[4], (uint32_t) value);
+}
+
+static inline uint16_t
+sc_read16be(const uint8_t *buf) {
+    return (buf[0] << 8) | buf[1];
+}
+
+static inline uint32_t
+sc_read32be(const uint8_t *buf) {
+    return ((uint32_t) buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+}
+
+static inline uint64_t
+sc_read64be(const uint8_t *buf) {
+    uint32_t msb = sc_read32be(buf);
+    uint32_t lsb = sc_read32be(&buf[4]);
+    return ((uint64_t) msb << 32) | lsb;
+}
+
+#endif