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