1 files changed, 34 insertions, 0 deletions
diff --git a/shared/bin.h b/shared/bin.h
new file mode 100644
index 0000000..2b65c95
--- /dev/null
+++ b/shared/bin.h
@@ -0,0 +1,34 @@
+#pragma once
+/**
+ * helper file for binary data
+ *
+ * - fix endianness with functions inspired by UNIX arpa/inet.h
+ * - convert uint16_t and uint32_t to w2_s_bin
+ */
+
+#include <stdint.h>
+
+extern uint8_t g_w2_endianness;
+
+typedef struct {
+	uint16_t bytes;
+	uint8_t data[];
+} w2_s_bin;
+
+/** allocate new w2_s_bin struct and fill with `*data` for `bytes` bytes */
+w2_s_bin *w2_bin_s_alloc(uint16_t bytes, uint8_t *data);
+/** concatenate 2 w2_s_bin structs, deallocates `a` and `b` */
+w2_s_bin *w2_bin_s_cat(w2_s_bin *a, w2_s_bin *b);
+
+w2_s_bin *w2_bin_from_uint8_t(uint8_t data);
+w2_s_bin *w2_bin_from_uint16_t(uint16_t data);
+w2_s_bin *w2_bin_from_uint32_t(uint32_t data);
+
+/** convert 32-bit value from host endian to network (big-endian) */
+uint32_t w2_bin_hton32(uint32_t h32);
+/** convert 16-bit value from host endian to network (big-endian) */
+uint16_t w2_bin_hton16(uint16_t h16);
+/** convert 32-bit value from network (big-endian) to host endian */
+uint32_t w2_bin_ntoh32(uint32_t n32);
+/** convert 16-bit value from network (big-endian) to host endian */
+uint16_t w2_bin_ntoh16(uint16_t n16);