初始提交

src/Rtmp/utils.cpp

@@ -0,0 +1,64 @@
+#include "utils.h"
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <arpa/inet.h>
+
+/*
+ * Used to do unaligned loads on archs that don't support them. GCC can mostly
+ * optimize these away.
+ */
+uint32_t load_be32(const void *p)
+{
+	uint32_t val;
+	memcpy(&val, p, sizeof val);
+	return ntohl(val);
+}
+
+uint16_t load_be16(const void *p)
+{
+	uint16_t val;
+	memcpy(&val, p, sizeof val);
+	return ntohs(val);
+}
+
+uint32_t load_le32(const void *p)
+{
+	const uint8_t *data = (const uint8_t *) p;
+	return data[0] | ((uint32_t) data[1] << 8) |
+		((uint32_t) data[2] << 16) | ((uint32_t) data[3] << 24);
+}
+
+uint32_t load_be24(const void *p)
+{
+	const uint8_t *data = (const uint8_t *) p;
+	return data[2] | ((uint32_t) data[1] << 8) | ((uint32_t) data[0] << 16);
+}
+
+void set_be24(void *p, uint32_t val)
+{
+	uint8_t *data = (uint8_t *) p;
+	data[0] = val >> 16;
+	data[1] = val >> 8;
+	data[2] = val;
+}
+
+void set_le32(void *p, uint32_t val)
+{
+	uint8_t *data = (uint8_t *) p;
+	data[0] = val;
+	data[1] = val >> 8;
+	data[2] = val >> 16;
+	data[3] = val >> 24;
+}
+
+void set_be32(void *p, uint32_t val)
+{
+	uint8_t *data = (uint8_t *) p;
+	data[3] = val;
+	data[2] = val >> 8;
+	data[1] = val >> 16;
+	data[0] = val >> 24;
+}
+