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C++获取zip文件列表

OC/C/C++ 水墨上仙 1486次浏览

C++获取zip文件列表

//&nbspZipFile.h&nbsp

#ifndef ZIPFILE_H
#define ZIPFILE_H
#include <string>
#include <vector>
#define ZIP_OK     0
#define ZIP_ERR_OPEN   1
#define ZIP_ERR_WRONG_FILE  2
#define ZIP_ERR_WRONG_HEADER 3
#define BYTE unsigned char
#define ui32 unsigned int
#define ui16 unsigned short
struct FileHeader
{
 ui32 signature;
 ui16 version_made_by;
 ui16 version_needed;
 ui16 bitflags;
 ui16 comp_method;
 ui16 lastModFileTime;
 ui16 lastModFileDate;
 ui32 crc_32;
 ui32 comp_size;
 ui32 uncompr_size;
 ui16 fname_len;
 ui16 extra_field_len;
 ui16 fcomment_len;
 ui16 disk_num_start;
 ui16 internal_fattribute;
 ui32 external_fattribute;
 ui32 relative_offset;
 char* file_name;
 char* extra_field;
 char* file_comment;
};
class CZipFile
{
private:
public:
 CZipFile();
 CZipFile(std::string);
 virtual ~CZipFile();
 void ResetContent(void);
 std::string GetFileName(void);
 void SetFileName(std::string);
 bool    OpenFile(void);
 int     GetFilesNumber(void);
 FileHeader * GetFileAttributes(int);
private:
 void ReadCentralDirectory(BYTE * data,long len);
 int  ReadFileHeader(BYTE * data, FileHeader * hdr);
 ui32 ReadValue(unsigned char * buf, int nbits);
 
 std::string    m_FileName;
 std::vector<void*>  m_FileAttributes;
};
#endif /*ZIPFILE_H */
 

//
//&nbspZipFile.cpp&nbsp:&nbspimplementation&nbspfile
//

#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "ZipFile.h"
using namespace std;
/////////////////////////////////////////////////////////////////////////////
// CZipFile
CZipFile::CZipFile()
{
 m_FileName="";
}
CZipFile::CZipFile(string fn)
{
 m_FileName = fn;
}
CZipFile::~CZipFile()
{
 ResetContent();
}
void CZipFile::ResetContent(void)
{
 for(int i=0;i<GetFilesNumber();i++)
  delete(GetFileAttributes(i));
 m_FileAttributes.clear();
 m_FileName="";
}
string CZipFile::GetFileName(void)
{
 return m_FileName;
}
void CZipFile::SetFileName(string fn)
{
 m_FileName = fn;
}
int CZipFile::GetFilesNumber(void)
{
 return (m_FileAttributes.size());
}
bool CZipFile::OpenFile(void)
{
 if(m_FileName=="")
  return ZIP_ERR_OPEN;
 //read all the file data
 FILE * fp;
 fp=fopen(m_FileName.c_str(),"rb");
 if(fp==NULL)
  return ZIP_ERR_OPEN;
 fseek(fp,0,SEEK_END);
 long siz=ftell(fp);
 fseek(fp,0,SEEK_SET);
 BYTE *buf=new BYTE[siz];
 ui32 n= fread((void*) buf,(unsigned int)siz,1,fp);
 fclose(fp);
 //local file header signature control to check the file correctiveness
 if(*((ui32*)buf)!=0x04034b50)
  return ZIP_ERR_WRONG_FILE;
 ReadCentralDirectory(buf,siz);
 
 return ZIP_OK;
}
void CZipFile::ReadCentralDirectory(BYTE * data,long len)
{
 /*read the central Directory Data Structure;
 data contains the zipped archive;
 return the number of files read*/
 BYTE * tmp;
 //search the signature
 tmp=data;
 ui32 * tmp2;
 tmp2= (ui32 *)tmp;
 len-=4;
 while((*tmp2)!=0x02014b50 && len)
 {
  tmp++;
  tmp2= (ui32 *)tmp;
  len--;
 }
 //retrieve the FileHeader for each file
 int siz;
 do
 {
  FileHeader fhdr;
  siz = ReadFileHeader(tmp, &fhdr);
  if(siz)
  {
   FileHeader *pfhdr = new(FileHeader);
   *pfhdr=fhdr;
   m_FileAttributes.push_back(pfhdr);
  }
  tmp+=siz;
 }while(siz!=0);
}
int CZipFile::ReadFileHeader(BYTE * data, FileHeader * hdr)
{
 /*Name:    int CZipFile::ReadFileHeader(BYTE * data, CString* stData)
 /*It read the file header in the Central Directory Structure
 Return the number of bytes read; if the stream does not contain
 a valid local_file_header 0 is returned and the stream pointer (f)
 is not modified
 st is filled with all the data;
 */
 BYTE * origdata=data;
// FileHeader hdr;
 //fill the values into the file_header structure
 hdr->signature            = (ui32) ReadValue(data   ,32);
 if(hdr->signature!=0x02014b50)
  return 0; //no further file
 hdr->version_made_by      = (ui16) ReadValue(data+4 ,16);
 hdr->version_needed       = (ui16) ReadValue(data+6 ,16);
 hdr->bitflags             = (ui16) ReadValue(data+8 ,16);
 hdr->comp_method          = (ui16) ReadValue(data+10,16);
 hdr->lastModFileTime      = (ui16) ReadValue(data+12,16);
 hdr->lastModFileDate      = (ui16) ReadValue(data+14,16);
 hdr->crc_32               = (ui32) ReadValue(data+16,32);
 hdr->comp_size            = (ui32) ReadValue(data+20,32);
 hdr->uncompr_size         = (ui32) ReadValue(data+24,32);
 hdr->fname_len            = (ui16) ReadValue(data+28,16);
 hdr->extra_field_len      = (ui16) ReadValue(data+30,16);
 hdr->fcomment_len         = (ui16) ReadValue(data+32,16);
 hdr->disk_num_start       = (ui16) ReadValue(data+34,16);
 hdr->internal_fattribute  = (ui16) ReadValue(data+36,16);
 hdr->external_fattribute  = (ui32) ReadValue(data+38,32);
 hdr->relative_offset      = (ui32) ReadValue(data+42,32);
 data+=46;
 if(hdr->fname_len>0)
 {
  char *fn;
  fn=new (char[hdr->fname_len+1]);
  strncpy(fn,(char*)data,hdr->fname_len);
  fn[hdr->fname_len]='\0';
  hdr->file_name = fn;
  data+=hdr->fname_len;
 }
 if(hdr->extra_field_len>0)
 {
  char *fn;
  fn=new (char[hdr->extra_field_len+1]);
  strncpy(fn,(char*)data,hdr->extra_field_len);
  fn[hdr->extra_field_len]='\0';
  hdr->extra_field = fn;
  data += hdr->extra_field_len;
 }
 //file comment
 if(hdr->fcomment_len>0)
 {
  char *fn;
  fn=new (char[hdr->fcomment_len+1]);
  strncpy(fn,(char*)data,hdr->fcomment_len);
  fn[hdr->fcomment_len]='\0';
  hdr->file_comment = fn;
  data += hdr->extra_field_len;
 }
 return (data-origdata);
}
ui32 CZipFile::ReadValue(unsigned char * buf, int nbits)
{
 /*Name:    void ReadValue(char*buf, int nbits)
 /*Return the value read from the buffer of size nbits;
 */
 ui32 value = 0;
 switch (nbits)
 {
 case (8):
  value = (ui32)*(buf);
  break;
 case(16):
  value = (((ui32)*(buf+1))<<8)+(ui32)*(buf);
  break;
 case(24):
  value = (((ui32)*(buf+2))<<16)+(((ui32)*(buf+1))<<8)+((ui32)*(buf));
  break;
 case(32):
  value = (((ui32)*(buf+3))<<24)+(((ui32)*(buf+2))<<16)+(((ui32)*(buf+1))<<8)+((ui32)*(buf));
  break;
 default:
  assert(1);
  break;
 }
 return(value);
}
FileHeader *CZipFile::GetFileAttributes(int index)
{
 if(index<0 || index >m_FileAttributes.size())
  return NULL;
 else
  return((FileHeader *)m_FileAttributes.at(index));
}
 
 

//main.cpp

#include <stdio.h>
#include "ZipFile.h"
int main(int argc , char* argv[])
{
 if(2 != argc)
 {
  printf("zipFile must provide.\n");
  return 0;
 }
 CZipFile zipTest;
 zipTest.SetFileName(argv[1]);
 zipTest.OpenFile();
 for(int i = 0;i< zipTest.GetFilesNumber();i++)
 {
  printf("%s\n",  zipTest.GetFileAttributes(i)->file_name);
 }
 return 0;
}


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