Initial community commit

Src/apev2/header.cpp

@@ -0,0 +1,88 @@
+#include "header.h"
+#include "flags.h"
+#include "util.h"
+#include <limits.h>
+
+static char preamble[] =  { 'A', 'P', 'E', 'T', 'A', 'G', 'E', 'X' };
+
+APEv2::Header::Header(void *data)
+{
+	memcpy(&headerData, data, sizeof(headerData));
+
+	// covert to host endian
+	//headerData.preamble=htons(headerData.preamble);
+	headerData.version=ATON16(headerData.version);
+	headerData.size=ATON32(headerData.size);
+	headerData.items=ATON32(headerData.items);
+	headerData.flags=ATON32(headerData.flags);
+}
+
+APEv2::Header::Header(const HeaderData *data)
+{
+	memcpy(&headerData.preamble, preamble, sizeof(headerData.preamble));
+	headerData.version = NTOA32(2000);
+	headerData.size = data->size;
+	headerData.items = data->items;
+	headerData.flags = data->flags;
+	headerData.reserved = 0;
+}
+
+uint32_t APEv2::Header::GetFlags()
+{
+	return headerData.flags;
+}
+
+bool APEv2::Header::Valid()
+{
+	return !memcmp(&headerData.preamble, preamble, 8) && headerData.reserved == 0;
+}
+
+uint32_t APEv2::Header::TagSize()
+{
+	size_t size = headerData.size;
+	if (IsHeader() && HasFooter())
+		size+=SIZE;
+	if (IsFooter() && HasHeader())
+		size+=SIZE;
+
+	if (size > ULONG_MAX)
+		return 0;
+		
+	return (uint32_t)size;
+}
+
+bool APEv2::Header::HasHeader()
+{
+	return !!(headerData.flags & FLAG_HEADER_HAS_HEADER);
+}
+
+bool APEv2::Header::HasFooter()
+{
+	return !(headerData.flags & FLAG_HEADER_NO_FOOTER);
+}
+
+bool APEv2::Header::IsFooter()
+{
+	return !(headerData.flags & FLAG_HEADER_IS_HEADER);
+}
+
+bool APEv2::Header::IsHeader()
+{
+	return !!(headerData.flags & FLAG_HEADER_IS_HEADER);
+}
+
+int APEv2::Header::Encode(void *data, size_t len)
+{
+	if (len < 32)
+		return APEV2_TOO_SMALL;
+
+	HeaderData endianCorrectData = headerData;
+
+		endianCorrectData.version=NTOA16(endianCorrectData.version);
+	endianCorrectData.size=NTOA32(endianCorrectData.size);
+	endianCorrectData.items=NTOA32(endianCorrectData.items);
+	endianCorrectData.flags=NTOA32(endianCorrectData.flags);
+
+	memcpy(data, &endianCorrectData, sizeof(endianCorrectData));
+	return APEV2_SUCCESS;
+}