fill basic ZIP header format

This commit is contained in:
2026-08-07 10:26:20 +09:00
parent 1d5dd34bed
commit 969bce540e
2 changed files with 75 additions and 20 deletions
+59 -8
View File
@@ -5,6 +5,8 @@
#include "ZipDefine.h"
#include "CRC.h"
#define TARGET_FILE_NAME "MyZip.txt"
bool ZipArchiver();
uint32_t getCRC32(const uint8_t* pData, size_t length);
@@ -49,11 +51,11 @@ bool ZipArchiver()
{
LocalFileHeader LFHeader = {};
CentralDirectory CentDir = {};
EoCDRecord ECDR = {};
EoCDRecord EOCDR = {};
using namespace std;
ifstream fileIn("MyZip.txt", ios::binary);
ifstream fileIn(TARGET_FILE_NAME, ios::binary);
bool iRet = fileIn.is_open();
if (!iRet)
{
@@ -75,13 +77,62 @@ bool ZipArchiver()
// Read
fileIn.read((char *)pFile, fileInSize);
// Get CRC value
// TODO : streamsize 와 size_t 의 mismatch (long long <-> unsigned long long)
uint32_t myCRC = getCRC32(pFile, fileInSize);
// ZIP 포맷 채워넣기
{
// Get CRC value
// TODO : streamsize 와 size_t 의 mismatch (long long <-> unsigned long long)
uint32_t myCRC = getCRC32(pFile, fileInSize);
// Put CRC value
LFHeader.crc32 = myCRC;
CentDir.crc32 = myCRC;
// Put PK Signature
LFHeader.signature = PK_SIGNATURE_LF_HEADER;
CentDir.signature = PK_SIGNATURE_CENT_DIR;
EOCDR.signature = PK_SIGNATURE_EO_CDR;
// TOOD : versionMadeBy (Only CentDir)
// TODO : versionNeededToExtract
// TODO : generalBitFlag
// Put compressed method (uncompressed)
LFHeader.compressionMethod = METHOD_UNCOMPRESSED;
CentDir.compressionMethod = METHOD_UNCOMPRESSED;
// TODO : lastMode[Time|Date]
// Put CRC value
LFHeader.crc32 = myCRC;
CentDir.crc32 = myCRC;
// Put File size
LFHeader.sizeOfUncompressed = (uint32_t)fileInSize;
CentDir.sizeOfUncompressed = (uint32_t)fileInSize;
LFHeader.sizeOfCompressed = LFHeader.sizeOfUncompressed;
CentDir.sizeOfCompressed = CentDir.sizeOfUncompressed;
// Put File name length
uint16_t fileNameLeng = strlen(TARGET_FILE_NAME);
LFHeader.lengthOfFileName = fileNameLeng;
CentDir.lengthOfFileName = fileNameLeng;
// Extra Field 는 사용하지 않음
// LFHeader.lengthOfExtraField = NOT_USED;
// CentDir.lengthOfExtraField = NOT_USED;
// TODO : CentDir 나머지 format
// - lengthOfFileComment
// - diskNumStart;
// - attributeInternal;
// - attributeExternal;
// - offsetLocalHeader;
// TODO : EOCDR 나머지 format
// - diskNumber
// - diskNumber_CentralDirStart
// - numOfCentralDir
// - numOfEntries;
// - SizeOfCentralDir;
// - OffsetOfCentralDirOffset;
// - LengthOfCommentLength;
}
// Free
free(pFile);