move some code to a shared folder

1 files changed, 64 insertions, 0 deletions

diff --git a/shared/bin.c b/shared/bin.c
new file mode 100644
index 0000000..a2c91a4
--- /dev/null
+++ b/shared/bin.c
@@ -0,0 +1,64 @@
+#include <stdlib.h>
+
+#include "bin.h"
+
+#define W2_ENDIAN_LITTLE (1)
+#define W2_ENDIAN_BIG (0)
+
+#define _SHIFT_0B (8 * 0)
+#define _SHIFT_1B (8 * 1)
+#define _SHIFT_2B (8 * 2)
+#define _SHIFT_3B (8 * 3)
+#define _BYTE_0 ((uint32_t)(0xff << (_SHIFT_0B)))
+#define _BYTE_1 ((uint32_t)(0xff << (_SHIFT_1B)))
+#define _BYTE_2 ((uint32_t)(0xff << (_SHIFT_2B)))
+#define _BYTE_3 ((uint32_t)(0xff << (_SHIFT_3B)))
+
+const uint8_t W2_STRUCT_T_SIZES[] = {sizeof(uint8_t), sizeof(uint16_t), sizeof(uint32_t)};
+
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wshift-count-overflow"
+w2_s_bin *w2_bin_from_uint8_t(uint8_t data) {
+	size_t size	  = 1;
+	w2_s_bin *ret = malloc(sizeof(w2_s_bin) + sizeof(uint8_t) * size);
+	ret->bytes	  = size;
+	ret->data[0]  = data;
+	return ret;
+}
+
+w2_s_bin *w2_bin_from_uint16_t(uint16_t data) {
+	size_t size	  = 2;
+	w2_s_bin *ret = malloc(sizeof(w2_s_bin) + sizeof(uint8_t) * size);
+	data		  = w2_bin_hton16(data);
+	ret->bytes	  = size;
+	ret->data[0]  = (data & _BYTE_1) >> _SHIFT_1B;
+	ret->data[1]  = (data & _BYTE_0) >> _SHIFT_0B;
+	return ret;
+}
+
+w2_s_bin *w2_bin_from_uint32_t(uint32_t data) {
+	size_t size	  = 4;
+	w2_s_bin *ret = malloc(sizeof(w2_s_bin) + sizeof(uint8_t) * size);
+	data		  = w2_bin_hton32(data);
+	ret->bytes	  = size;
+	ret->data[0]  = (data & _BYTE_3) >> _SHIFT_3B;
+	ret->data[1]  = (data & _BYTE_2) >> _SHIFT_2B;
+	ret->data[2]  = (data & _BYTE_1) >> _SHIFT_1B;
+	ret->data[3]  = (data & _BYTE_0) >> _SHIFT_0B;
+	return ret;
+}
+
+uint32_t w2_bin_hton32(uint32_t h32) {
+	if (g_w2_endianness == W2_ENDIAN_BIG) return h32;
+	return ((h32 & _BYTE_0) << _SHIFT_3B) | ((h32 & _BYTE_1) << _SHIFT_1B) |
+		   ((h32 & _BYTE_2) >> _SHIFT_1B) | ((h32 & _BYTE_3) >> _SHIFT_3B);
+}
+#pragma GCC diagnostic pop
+
+uint16_t w2_bin_hton16(uint16_t h16) {
+	if (g_w2_endianness == W2_ENDIAN_BIG) return h16;
+	return ((h16 & _BYTE_0) << _SHIFT_1B) | ((h16 & _BYTE_1) >> _SHIFT_1B);
+}
+
+uint32_t w2_bin_ntoh32(uint32_t n32) { return w2_bin_hton32(n32); }
+uint16_t w2_bin_ntoh16(uint16_t n16) { return w2_bin_hton16(n16); }