/*

   minizip.c

   Version 1.01e, February 12th, 2005

   Copyright (C) 1998-2005 Gilles Vollant

*/

#include "common.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include "zip.h"

#define WRITEBUFFERSIZE (16384)

#define MAXFILENAME (256)

char* get_value(char* var, char** env_list);

#if 0 //TODO:  not supported currently 

#ifdef unix

uLong filetime (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 (dt == NULL) { /* do nothing. to avoid warnings */ };

  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( 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(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 : zip [-o] [-a] [-0 to -9] 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(int argc, char *argv[], char** env_list)

{

    int i;

    int opt_overwrite=0;

    int opt_compress_level= Z_DEFAULT_COMPRESSION;  

    int zipfilenamearg = 0;

    char filename_try[MAXFILENAME+16]; //heap_alloc

    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

    {

#ifdef __SYMBIAN32__  // <hack> changing directory to the working dir

		char* path=get_value("PWD", env_list); 

		if(path) {

			if (chdir(path) < 0) {

				printf("%s: %s\n", path, strerror(errno));

				return -1;

			}

		}

#endif //__SYMBIAN32__ 	// </hack>

        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);

                    fflush(NULL);

                    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;

        zf = zipOpen(filename_try,(opt_overwrite==2) ? 2 : 0);

        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 = NULL;

                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;

#if 0 // Not supported currently

                filetime(filenameinzip,&zi.tmz_date,&zi.dosDate);

#endif                

/*

                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;

}