/*
   minizip.c
   Version 1.01e, February 12th, 2005

   Copyright (C) 1998-2005 Gilles Vollant
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <fcntl.h>

#ifdef unix
# include <unistd.h>
# include <utime.h>
# include <sys/types.h>
# include <sys/stat.h>
#else
# include <direct.h>
# include <io.h>
#endif

#include "zip.h"

#ifdef WIN32
#define USEWIN32IOAPI
#include "iowin32.h"
#endif



#define WRITEBUFFERSIZE (16384)
#define MAXFILENAME (256)

#ifdef WIN32
uLong filetime(f, tmzip, dt)
    char *f;                /* name of file to get info on */
    tm_zip *tmzip;             /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
{
  int ret = 0;
  {
      FILETIME ftLocal;
      HANDLE hFind;
      WIN32_FIND_DATA  ff32;

      hFind = FindFirstFile(f,&ff32);
      if (hFind != INVALID_HANDLE_VALUE)
      {
        FileTimeToLocalFileTime(&(ff32.ftLastWriteTime),&ftLocal);
        FileTimeToDosDateTime(&ftLocal,((LPWORD)dt)+1,((LPWORD)dt)+0);
        FindClose(hFind);
        ret = 1;
      }
  }
  return ret;
}
#else
#ifdef unix
uLong filetime(f, tmzip, dt)
    char *f;               /* name of file to get info on */
    tm_zip *tmzip;         /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
{
  int ret=0;
  struct stat s;        /* results of stat() */
  struct tm* filedate;
  time_t tm_t=0;

  if (strcmp(f,"-")!=0)
  {
    char name[MAXFILENAME+1];
    int len = strlen(f);
    if (len > MAXFILENAME)
      len = MAXFILENAME;

    strncpy(name, f,MAXFILENAME-1);
    /* strncpy doesnt append the trailing NULL, of the string is too long. */
    name[ MAXFILENAME ] = '\0';

    if (name[len - 1] == '/')
      name[len - 1] = '\0';
    /* not all systems allow stat'ing a file with / appended */
    if (stat(name,&s)==0)
    {
      tm_t = s.st_mtime;
      ret = 1;
    }
  }
  filedate = localtime(&tm_t);

  tmzip->tm_sec  = filedate->tm_sec;
  tmzip->tm_min  = filedate->tm_min;
  tmzip->tm_hour = filedate->tm_hour;
  tmzip->tm_mday = filedate->tm_mday;
  tmzip->tm_mon  = filedate->tm_mon ;
  tmzip->tm_year = filedate->tm_year;

  return ret;
}
#else
uLong filetime(f, tmzip, dt)
    char *f;                /* name of file to get info on */
    tm_zip *tmzip;             /* return value: access, modific. and creation times */
    uLong *dt;             /* dostime */
{
    return 0;
}
#endif
#endif




int check_exist_file(filename)
    const char* filename;
{
    FILE* ftestexist;
    int ret = 1;
    ftestexist = fopen(filename,"rb");
    if (ftestexist==NULL)
        ret = 0;
    else
        fclose(ftestexist);
    return ret;
}

void do_banner()
{
    printf("MiniZip 1.01b, demo of zLib + Zip package written by Gilles Vollant\n");
    printf("more info at http://www.winimage.com/zLibDll/unzip.html\n\n");
}

void do_help()
{
    printf("Usage : minizip [-o] [-a] [-0 to -9] [-p password] file.zip [files_to_add]\n\n" \
           "  -o  Overwrite existing file.zip\n" \
           "  -a  Append to existing file.zip\n" \
           "  -0  Store only\n" \
           "  -1  Compress faster\n" \
           "  -9  Compress better\n\n");
}

/* calculate the CRC32 of a file,
   because to encrypt a file, we need known the CRC32 of the file before */
int getFileCrc(const char* filenameinzip,void*buf,unsigned long size_buf,unsigned long* result_crc)
{
   unsigned long calculate_crc=0;
   int err=ZIP_OK;
   FILE * fin = fopen(filenameinzip,"rb");
   unsigned long size_read = 0;
   unsigned long total_read = 0;
   if (fin==NULL)
   {
       err = ZIP_ERRNO;
   }

    if (err == ZIP_OK)
        do
        {
            err = ZIP_OK;
            size_read = (int)fread(buf,1,size_buf,fin);
            if (size_read < size_buf)
                if (feof(fin)==0)
            {
                printf("error in reading %s\n",filenameinzip);
                err = ZIP_ERRNO;
            }

            if (size_read>0)
                calculate_crc = crc32(calculate_crc,buf,size_read);
            total_read += size_read;

        } while ((err == ZIP_OK) && (size_read>0));

    if (fin)
        fclose(fin);

    *result_crc=calculate_crc;
    printf("file %s crc %x\n",filenameinzip,calculate_crc);
    return err;
}

//int main(argc,argv)
//    int argc;
//    char *argv[];
//{
//    int i;
//    int opt_overwrite=0;
//    int opt_compress_level=Z_DEFAULT_COMPRESSION;
//    int zipfilenamearg = 0;
//    char filename_try[MAXFILENAME+16];
//    int zipok;
//    int err=0;
//    int size_buf=0;
//    void* buf=NULL;
//    const char* password=NULL;


//    do_banner();
//    if (argc==1)
//    {
//        do_help();
//        return 0;
//    }
//    else
//    {
//        for (i=1;i<argc;i++)
//        {
//            if ((*argv[i])=='-')
//            {
//                const char *p=argv[i]+1;

//                while ((*p)!='\0')
//                {
//                    char c=*(p++);;
//                    if ((c=='o') || (c=='O'))
//                        opt_overwrite = 1;
//                    if ((c=='a') || (c=='A'))
//                        opt_overwrite = 2;
//                    if ((c>='0') && (c<='9'))
//                        opt_compress_level = c-'0';

//                    if (((c=='p') || (c=='P')) && (i+1<argc))
//                    {
//                        password=argv[i+1];
//                        i++;
//                    }
//                }
//            }
//            else
//                if (zipfilenamearg == 0)
//                    zipfilenamearg = i ;
//        }
//    }

//    size_buf = WRITEBUFFERSIZE;
//    buf = (void*)malloc(size_buf);
//    if (buf==NULL)
//    {
//        printf("Error allocating memory\n");
//        return ZIP_INTERNALERROR;
//    }

//    if (zipfilenamearg==0)
//        zipok=0;
//    else
//    {
//        int i,len;
//        int dot_found=0;

//        zipok = 1 ;
//        strncpy(filename_try, argv[zipfilenamearg],MAXFILENAME-1);
//        /* strncpy doesnt append the trailing NULL, of the string is too long. */
//        filename_try[ MAXFILENAME ] = '\0';

//        len=(int)strlen(filename_try);
//        for (i=0;i<len;i++)
//            if (filename_try[i]=='.')
//                dot_found=1;

//        if (dot_found==0)
//            strcat(filename_try,".zip");

//        if (opt_overwrite==2)
//        {
//            /* if the file don't exist, we not append file */
//            if (check_exist_file(filename_try)==0)
//                opt_overwrite=1;
//        }
//        else
//        if (opt_overwrite==0)
//            if (check_exist_file(filename_try)!=0)
//            {
//                char rep=0;
//                do
//                {
//                    char answer[128];
//                    int ret;
//                    printf("The file %s exists. Overwrite ? [y]es, [n]o, [a]ppend : ",filename_try);
//                    ret = scanf("%1s",answer);
//                    if (ret != 1)
//                    {
//                       exit(EXIT_FAILURE);
//                    }
//                    rep = answer[0] ;
//                    if ((rep>='a') && (rep<='z'))
//                        rep -= 0x20;
//                }
//                while ((rep!='Y') && (rep!='N') && (rep!='A'));
//                if (rep=='N')
//                    zipok = 0;
//                if (rep=='A')
//                    opt_overwrite = 2;
//            }
//    }

//    if (zipok==1)
//    {
//        zipFile zf;
//        int errclose;
//#        ifdef USEWIN32IOAPI
//        zlib_filefunc_def ffunc;
//        fill_win32_filefunc(&ffunc);
//        zf = zipOpen2(filename_try,(opt_overwrite==2) ? 2 : 0,NULL,&ffunc);
//#        else
//        zf = zipOpen(filename_try,(opt_overwrite==2) ? 2 : 0);
//#        endif

//        if (zf == NULL)
//        {
//            printf("error opening %s\n",filename_try);
//            err= ZIP_ERRNO;
//        }
//        else
//            printf("creating %s\n",filename_try);

//        for (i=zipfilenamearg+1;(i<argc) && (err==ZIP_OK);i++)
//        {
//            if (!((((*(argv[i]))=='-') || ((*(argv[i]))=='/')) &&
//                  ((argv[i][1]=='o') || (argv[i][1]=='O') ||
//                   (argv[i][1]=='a') || (argv[i][1]=='A') ||
//                   (argv[i][1]=='p') || (argv[i][1]=='P') ||
//                   ((argv[i][1]>='0') || (argv[i][1]<='9'))) &&
//                  (strlen(argv[i]) == 2)))
//            {
//                FILE * fin;
//                int size_read;
//                const char* filenameinzip = argv[i];
//                zip_fileinfo zi;
//                unsigned long crcFile=0;

//                zi.tmz_date.tm_sec = zi.tmz_date.tm_min = zi.tmz_date.tm_hour =
//                zi.tmz_date.tm_mday = zi.tmz_date.tm_mon = zi.tmz_date.tm_year = 0;
//                zi.dosDate = 0;
//                zi.internal_fa = 0;
//                zi.external_fa = 0;
//                filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);

///*
//                err = zipOpenNewFileInZip(zf,filenameinzip,&zi,
//                                 NULL,0,NULL,0,NULL / * comment * /,
//                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
//                                 opt_compress_level);
//*/
//                if ((password != NULL) && (err==ZIP_OK))
//                    err = getFileCrc(filenameinzip,buf,size_buf,&crcFile);

//                err = zipOpenNewFileInZip3(zf,filenameinzip,&zi,
//                                 NULL,0,NULL,0,NULL /* comment*/,
//                                 (opt_compress_level != 0) ? Z_DEFLATED : 0,
//                                 opt_compress_level,0,
//                                 /* -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY, */
//                                 -MAX_WBITS, DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY,
//                                 password,crcFile);

//                if (err != ZIP_OK)
//                    printf("error in opening %s in zipfile\n",filenameinzip);
//                else
//                {
//                    fin = fopen(filenameinzip,"rb");
//                    if (fin==NULL)
//                    {
//                        err=ZIP_ERRNO;
//                        printf("error in opening %s for reading\n",filenameinzip);
//                    }
//                }

//                if (err == ZIP_OK)
//                    do
//                    {
//                        err = ZIP_OK;
//                        size_read = (int)fread(buf,1,size_buf,fin);
//                        if (size_read < size_buf)
//                            if (feof(fin)==0)
//                        {
//                            printf("error in reading %s\n",filenameinzip);
//                            err = ZIP_ERRNO;
//                        }

//                        if (size_read>0)
//                        {
//                            err = zipWriteInFileInZip (zf,buf,size_read);
//                            if (err<0)
//                            {
//                                printf("error in writing %s in the zipfile\n",
//                                                 filenameinzip);
//                            }

//                        }
//                    } while ((err == ZIP_OK) && (size_read>0));

//                if (fin)
//                    fclose(fin);

//                if (err<0)
//                    err=ZIP_ERRNO;
//                else
//                {
//                    err = zipCloseFileInZip(zf);
//                    if (err!=ZIP_OK)
//                        printf("error in closing %s in the zipfile\n",
//                                    filenameinzip);
//                }
//            }
//        }
//        errclose = zipClose(zf,NULL);
//        if (errclose != ZIP_OK)
//            printf("error in closing %s\n",filename_try);
//    }
//    else
//    {
//       do_help();
//    }

//    free(buf);
//    return 0;
//}
