[opengtoolkit-cvs] lvzip/c_source miniunz.c,1.3,1.4 minizip.c,1.3,1.4 mztools.c,NONE,1.1 mztools.h,NONE,1.1

[Rolf K. <lab...@us...>]

Update of /cvsroot/opengtoolkit/lvzip/c_source
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv30678/c_source

Added Files:
	miniunz.c minizip.c mztools.c mztools.h 
Log Message:
Added extra files from most recent distribution of Gilles Volants zip/unzip library

--- NEW FILE: mztools.h ---
/*
  Additional tools for Minizip
  Code: Xavier Roche '2004
  License: Same as ZLIB (www.gzip.org)
*/

#ifndef _zip_tools_H
#define _zip_tools_H

#ifdef __cplusplus
extern "C" {
#endif

#ifndef _ZLIB_H
#include "zlib.h"
#endif

#include "unzip.h"

/* Repair a ZIP file (missing central directory) 
   file: file to recover
   fileOut: output file after recovery
   fileOutTmp: temporary file name used for recovery
*/
extern int ZEXPORT unzRepair(const char* file, 
                             const char* fileOut, 
                             const char* fileOutTmp, 
                             uLong* nRecovered,
                             uLong* bytesRecovered);

#endif

--- NEW FILE: mztools.c ---
/*
  Additional tools for Minizip
  Code: Xavier Roche '2004
  License: Same as ZLIB (www.gzip.org)
*/

/* Code */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "zlib.h"
#include "unzip.h"

#define READ_8(adr)  ((unsigned char)*(adr))
#define READ_16(adr) ( READ_8(adr) | (READ_8(adr+1) << 8) )
#define READ_32(adr) ( READ_16(adr) | (READ_16((adr)+2) << 16) )

#define WRITE_8(buff, n) do { \
  *((unsigned char*)(buff)) = (unsigned char) ((n) & 0xff); \
} while(0)
#define WRITE_16(buff, n) do { \
  WRITE_8((unsigned char*)(buff), n); \
  WRITE_8(((unsigned char*)(buff)) + 1, (n) >> 8); \
} while(0)
#define WRITE_32(buff, n) do { \
  WRITE_16((unsigned char*)(buff), (n) & 0xffff); \
  WRITE_16((unsigned char*)(buff) + 2, (n) >> 16); \
} while(0)

extern int ZEXPORT unzRepair(file, fileOut, fileOutTmp, nRecovered, bytesRecovered)
const char* file;
const char* fileOut;
const char* fileOutTmp;
uLong* nRecovered;
uLong* bytesRecovered;
{
  int err = Z_OK;
  FILE* fpZip = fopen(file, "rb");
  FILE* fpOut = fopen(fileOut, "wb");
  FILE* fpOutCD = fopen(fileOutTmp, "wb");
  if (fpZip != NULL &&  fpOut != NULL) {
    int entries = 0;
    uLong totalBytes = 0;
    char header[30];
    char filename[256];
    char extra[1024];
    int offset = 0;
    int offsetCD = 0;
    while ( fread(header, 1, 30, fpZip) == 30 ) {
      int currentOffset = offset;

      /* File entry */
      if (READ_32(header) == 0x04034b50) {
        unsigned int version = READ_16(header + 4);
        unsigned int gpflag = READ_16(header + 6);
        unsigned int method = READ_16(header + 8);
        unsigned int filetime = READ_16(header + 10);
        unsigned int filedate = READ_16(header + 12);
        unsigned int crc = READ_32(header + 14); /* crc */
        unsigned int cpsize = READ_32(header + 18); /* compressed size */
        unsigned int uncpsize = READ_32(header + 22); /* uncompressed sz */
        unsigned int fnsize = READ_16(header + 26); /* file name length */
        unsigned int extsize = READ_16(header + 28); /* extra field length */
        filename[0] = extra[0] = '\0';
        
        /* Header */
        if (fwrite(header, 1, 30, fpOut) == 30) {
          offset += 30;
        } else {
          err = Z_ERRNO;
          break;
        }
        
        /* Filename */
        if (fnsize > 0) {
          if (fread(filename, 1, fnsize, fpZip) == fnsize) {
            if (fwrite(filename, 1, fnsize, fpOut) == fnsize) {
              offset += fnsize;
            } else {
              err = Z_ERRNO;
              break;
            }
          } else {
            err = Z_ERRNO;
            break;
          }
        } else {
          err = Z_STREAM_ERROR;
          break;
        }

        /* Extra field */
        if (extsize > 0) {
          if (fread(extra, 1, extsize, fpZip) == extsize) {
            if (fwrite(extra, 1, extsize, fpOut) == extsize) {
              offset += extsize;
            } else {
              err = Z_ERRNO;
              break;
            }
          } else {
            err = Z_ERRNO;
            break;
          }
        }
        
        /* Data */
        {
          int dataSize = cpsize;
          if (dataSize == 0) {
            dataSize = uncpsize;
          }
          if (dataSize > 0) {
            char* data = malloc(dataSize);
            if (data != NULL) {
              if ((int)fread(data, 1, dataSize, fpZip) == dataSize) {
                if ((int)fwrite(data, 1, dataSize, fpOut) == dataSize) {
                  offset += dataSize;
                  totalBytes += dataSize;
                } else {
                  err = Z_ERRNO;
                }
              } else {
                err = Z_ERRNO;
              }
              free(data);
              if (err != Z_OK) {
                break;
              }
            } else {
              err = Z_MEM_ERROR;
              break;
            }
          }
        }
        
        /* Central directory entry */
        {
          char header[46];
          char* comment = "";
          int comsize = (int) strlen(comment);
          WRITE_32(header, 0x02014b50);
          WRITE_16(header + 4, version);
          WRITE_16(header + 6, version);
          WRITE_16(header + 8, gpflag);
          WRITE_16(header + 10, method);
          WRITE_16(header + 12, filetime);
          WRITE_16(header + 14, filedate);
          WRITE_32(header + 16, crc);
          WRITE_32(header + 20, cpsize);
          WRITE_32(header + 24, uncpsize);
          WRITE_16(header + 28, fnsize);
          WRITE_16(header + 30, extsize);
          WRITE_16(header + 32, comsize);
          WRITE_16(header + 34, 0);     /* disk # */
          WRITE_16(header + 36, 0);     /* int attrb */
          WRITE_32(header + 38, 0);     /* ext attrb */
          WRITE_32(header + 42, currentOffset);
          /* Header */
          if (fwrite(header, 1, 46, fpOutCD) == 46) {
            offsetCD += 46;
            
            /* Filename */
            if (fnsize > 0) {
              if (fwrite(filename, 1, fnsize, fpOutCD) == fnsize) {
                offsetCD += fnsize;
              } else {
                err = Z_ERRNO;
                break;
              }
            } else {
              err = Z_STREAM_ERROR;
              break;
            }
            
            /* Extra field */
            if (extsize > 0) {
              if (fwrite(extra, 1, extsize, fpOutCD) == extsize) {
                offsetCD += extsize;
              } else {
                err = Z_ERRNO;
                break;
              }
            }
            
            /* Comment field */
            if (comsize > 0) {
              if ((int)fwrite(comment, 1, comsize, fpOutCD) == comsize) {
                offsetCD += comsize;
              } else {
                err = Z_ERRNO;
                break;
              }
            }
            
            
          } else {
            err = Z_ERRNO;
            break;
          }
        }

        /* Success */
        entries++;

      } else {
        break;
      }
    }

    /* Final central directory  */
    {
      int entriesZip = entries;
      char header[22];
      char* comment = ""; // "ZIP File recovered by zlib/minizip/mztools";
      int comsize = (int) strlen(comment);
      if (entriesZip > 0xffff) {
        entriesZip = 0xffff;
      }
      WRITE_32(header, 0x06054b50);
      WRITE_16(header + 4, 0);    /* disk # */
      WRITE_16(header + 6, 0);    /* disk # */
      WRITE_16(header + 8, entriesZip);   /* hack */
      WRITE_16(header + 10, entriesZip);  /* hack */
      WRITE_32(header + 12, offsetCD);    /* size of CD */
      WRITE_32(header + 16, offset);      /* offset to CD */
      WRITE_16(header + 20, comsize);     /* comment */
      
      /* Header */
      if (fwrite(header, 1, 22, fpOutCD) == 22) {
        
        /* Comment field */
        if (comsize > 0) {
          if ((int)fwrite(comment, 1, comsize, fpOutCD) != comsize) {
            err = Z_ERRNO;
          }
        }
        
      } else {
        err = Z_ERRNO;
      }
    }

    /* Final merge (file + central directory) */
    fclose(fpOutCD);
    if (err == Z_OK) {
      fpOutCD = fopen(fileOutTmp, "rb");
      if (fpOutCD != NULL) {
        int nRead;
        char buffer[8192];
        while ( (nRead = fread(buffer, 1, sizeof(buffer), fpOutCD)) > 0) {
          if ((int)fwrite(buffer, 1, nRead, fpOut) != nRead) {
            err = Z_ERRNO;
            break;
          }
        }
        fclose(fpOutCD);
      }
    }
    
    /* Close */
    fclose(fpZip);
    fclose(fpOut);
    
    /* Wipe temporary file */
    (void)remove(fileOutTmp);
    
    /* Number of recovered entries */
    if (err == Z_OK) {
      if (nRecovered != NULL) {
        *nRecovered = entries;
      }
      if (bytesRecovered != NULL) {
        *bytesRecovered = totalBytes;
      }
    }
  } else {
    err = Z_STREAM_ERROR;
  }
  return err;
}

--- NEW FILE: minizip.c ---
/*
   minizip.c
   Version 1.01b, May 30th, 2004

   Copyright (C) 1998-2004 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;
}

--- NEW FILE: miniunz.c ---
/*
   miniunz.c
   Version 1.01b, May 30th, 2004

   Copyright (C) 1998-2004 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>
#else
# include <direct.h>
# include <io.h>
#endif

#include "unzip.h"

#define CASESENSITIVITY (0)
#define WRITEBUFFERSIZE (8192)
#define MAXFILENAME (256)

#ifdef WIN32
#define USEWIN32IOAPI
#include "iowin32.h"
#endif
/*
  mini unzip, demo of unzip package

  usage :
  Usage : miniunz [-exvlo] file.zip [file_to_extract] [-d extractdir]

  list the file in the zipfile, and print the content of FILE_ID.ZIP or README.TXT
    if it exists
*/


/* change_file_date : change the date/time of a file
    filename : the filename of the file where date/time must be modified
    dosdate : the new date at the MSDos format (4 bytes)
    tmu_date : the SAME new date at the tm_unz format */
void change_file_date(filename,dosdate,tmu_date)
    const char *filename;
    uLong dosdate;
    tm_unz tmu_date;
{
#ifdef WIN32
  HANDLE hFile;
  FILETIME ftm,ftLocal,ftCreate,ftLastAcc,ftLastWrite;

  hFile = CreateFile(filename,GENERIC_READ | GENERIC_WRITE,
                      0,NULL,OPEN_EXISTING,0,NULL);
  GetFileTime(hFile,&ftCreate,&ftLastAcc,&ftLastWrite);
  DosDateTimeToFileTime((WORD)(dosdate>>16),(WORD)dosdate,&ftLocal);
  LocalFileTimeToFileTime(&ftLocal,&ftm);
  SetFileTime(hFile,&ftm,&ftLastAcc,&ftm);
  CloseHandle(hFile);
#else
#ifdef unix
  struct utimbuf ut;
  struct tm newdate;
  newdate.tm_sec = tmu_date.tm_sec;
  newdate.tm_min=tmu_date.tm_min;
  newdate.tm_hour=tmu_date.tm_hour;
  newdate.tm_mday=tmu_date.tm_mday;
  newdate.tm_mon=tmu_date.tm_mon;
  if (tmu_date.tm_year > 1900)
      newdate.tm_year=tmu_date.tm_year - 1900;
  else
      newdate.tm_year=tmu_date.tm_year ;
  newdate.tm_isdst=-1;

  ut.actime=ut.modtime=mktime(&newdate);
  utime(filename,&ut);
#endif
#endif
}


/* mymkdir and change_file_date are not 100 % portable
   As I don't know well Unix, I wait feedback for the unix portion */

int mymkdir(dirname)
    const char* dirname;
{
    int ret=0;
#ifdef WIN32
    ret = mkdir(dirname);
#else
#ifdef unix
    ret = mkdir (dirname,0775);
#endif
#endif
    return ret;
}

int makedir (newdir)
    char *newdir;
{
  char *buffer ;
  char *p;
  int  len = (int)strlen(newdir);

  if (len <= 0)
    return 0;

  buffer = (char*)malloc(len+1);
  strcpy(buffer,newdir);

  if (buffer[len-1] == '/') {
    buffer[len-1] = '\0';
  }
  if (mymkdir(buffer) == 0)
    {
      free(buffer);
      return 1;
    }

  p = buffer+1;
  while (1)
    {
      char hold;

      while(*p && *p != '\\' && *p != '/')
        p++;
      hold = *p;
      *p = 0;
      if ((mymkdir(buffer) == -1) && (errno == ENOENT))
        {
          printf("couldn't create directory %s\n",buffer);
          free(buffer);
          return 0;
        }
      if (hold == 0)
        break;
      *p++ = hold;
    }
  free(buffer);
  return 1;
}

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

void do_help()
{
    printf("Usage : miniunz [-e] [-x] [-v] [-l] [-o] [-p password] file.zip [file_to_extr.] [-d extractdir]\n\n" \
           "  -e  Extract without pathname (junk paths)\n" \
           "  -x  Extract with pathname\n" \
           "  -v  list files\n" \
           "  -l  list files\n" \
           "  -d  directory to extract into\n" \
           "  -o  overwrite files without prompting\n" \
           "  -p  extract crypted file using password\n\n");
}


int do_list(uf)
    unzFile uf;
{
    uLong i;
    unz_global_info gi;
    int err;

    err = unzGetGlobalInfo (uf,&gi);
    if (err!=UNZ_OK)
        printf("error %d with zipfile in unzGetGlobalInfo \n",err);
    printf(" Length  Method   Size  Ratio   Date    Time   CRC-32     Name\n");
    printf(" ------  ------   ----  -----   ----    ----   ------     ----\n");
    for (i=0;i<gi.number_entry;i++)
    {
        char filename_inzip[256];
        unz_file_info file_info;
        uLong ratio=0;
        const char *string_method;
        char charCrypt=' ';
        err = unzGetCurrentFileInfo(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);
        if (err!=UNZ_OK)
        {
            printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);
            break;
        }
        if (file_info.uncompressed_size>0)
            ratio = (file_info.compressed_size*100)/file_info.uncompressed_size;

        /* display a '*' if the file is crypted */
        if ((file_info.flag & 1) != 0)
            charCrypt='*';

        if (file_info.compression_method==0)
            string_method="Stored";
        else
        if (file_info.compression_method==Z_DEFLATED)
        {
            uInt iLevel=(uInt)((file_info.flag & 0x6)/2);
            if (iLevel==0)
              string_method="Defl:N";
            else if (iLevel==1)
              string_method="Defl:X";
            else if ((iLevel==2) || (iLevel==3))
              string_method="Defl:F"; /* 2:fast , 3 : extra fast*/
        }
        else
            string_method="Unkn. ";

        printf("%7lu  %6s%c%7lu %3lu%%  %2.2lu-%2.2lu-%2.2lu  %2.2lu:%2.2lu  %8.8lx   %s\n",
                file_info.uncompressed_size,string_method,
                charCrypt,
                file_info.compressed_size,
                ratio,
                (uLong)file_info.tmu_date.tm_mon + 1,
                (uLong)file_info.tmu_date.tm_mday,
                (uLong)file_info.tmu_date.tm_year % 100,
                (uLong)file_info.tmu_date.tm_hour,(uLong)file_info.tmu_date.tm_min,
                (uLong)file_info.crc,filename_inzip);
        if ((i+1)<gi.number_entry)
        {
            err = unzGoToNextFile(uf);
            if (err!=UNZ_OK)
            {
                printf("error %d with zipfile in unzGoToNextFile\n",err);
                break;
            }
        }
    }

    return 0;
}


int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite,password)
    unzFile uf;
    const int* popt_extract_without_path;
    int* popt_overwrite;
    const char* password;
{
    char filename_inzip[256];
    char* filename_withoutpath;
    char* p;
    int err=UNZ_OK;
    FILE *fout=NULL;
    void* buf;
    uInt size_buf;

    unz_file_info file_info;
    uLong ratio=0;
    err = unzGetCurrentFileInfo(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);

    if (err!=UNZ_OK)
    {
        printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);
        return err;
    }

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

    p = filename_withoutpath = filename_inzip;
    while ((*p) != '\0')
    {
        if (((*p)=='/') || ((*p)=='\\'))
            filename_withoutpath = p+1;
        p++;
    }

    if ((*filename_withoutpath)=='\0')
    {
        if ((*popt_extract_without_path)==0)
        {
            printf("creating directory: %s\n",filename_inzip);
            mymkdir(filename_inzip);
        }
    }
    else
    {
        const char* write_filename;
        int skip=0;

        if ((*popt_extract_without_path)==0)
            write_filename = filename_inzip;
        else
            write_filename = filename_withoutpath;

        err = unzOpenCurrentFilePassword(uf,password);
        if (err!=UNZ_OK)
        {
            printf("error %d with zipfile in unzOpenCurrentFilePassword\n",err);
        }

        if (((*popt_overwrite)==0) && (err==UNZ_OK))
        {
            char rep=0;
            FILE* ftestexist;
            ftestexist = fopen(write_filename,"rb");
            if (ftestexist!=NULL)
            {
                fclose(ftestexist);
                do
                {
                    char answer[128];
                    int ret;

                    printf("The file %s exists. Overwrite ? [y]es, [n]o, [A]ll: ",write_filename);
                    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')
                skip = 1;

            if (rep == 'A')
                *popt_overwrite=1;
        }

        if ((skip==0) && (err==UNZ_OK))
        {
            fout=fopen(write_filename,"wb");

            /* some zipfile don't contain directory alone before file */
            if ((fout==NULL) && ((*popt_extract_without_path)==0) &&
                                (filename_withoutpath!=(char*)filename_inzip))
            {
                char c=*(filename_withoutpath-1);
                *(filename_withoutpath-1)='\0';
                makedir(write_filename);
                *(filename_withoutpath-1)=c;
                fout=fopen(write_filename,"wb");
            }

            if (fout==NULL)
            {
                printf("error opening %s\n",write_filename);
            }
        }

        if (fout!=NULL)
        {
            printf(" extracting: %s\n",write_filename);

            do
            {
                err = unzReadCurrentFile(uf,buf,size_buf);
                if (err<0)
                {
                    printf("error %d with zipfile in unzReadCurrentFile\n",err);
                    break;
                }
                if (err>0)
                    if (fwrite(buf,err,1,fout)!=1)
                    {
                        printf("error in writing extracted file\n");
                        err=UNZ_ERRNO;
                        break;
                    }
            }
            while (err>0);
            if (fout)
                    fclose(fout);

            if (err==0)
                change_file_date(write_filename,file_info.dosDate,
                                 file_info.tmu_date);
        }

        if (err==UNZ_OK)
        {
            err = unzCloseCurrentFile (uf);
            if (err!=UNZ_OK)
            {
                printf("error %d with zipfile in unzCloseCurrentFile\n",err);
            }
        }
        else
            unzCloseCurrentFile(uf); /* don't lose the error */
    }

    free(buf);
    return err;
}


int do_extract(uf,opt_extract_without_path,opt_overwrite,password)
    unzFile uf;
    int opt_extract_without_path;
    int opt_overwrite;
    const char* password;
{
    uLong i;
    unz_global_info gi;
    int err;
    FILE* fout=NULL;

    err = unzGetGlobalInfo (uf,&gi);
    if (err!=UNZ_OK)
        printf("error %d with zipfile in unzGetGlobalInfo \n",err);

    for (i=0;i<gi.number_entry;i++)
    {
        if (do_extract_currentfile(uf,&opt_extract_without_path,
                                      &opt_overwrite,
                                      password) != UNZ_OK)
            break;

        if ((i+1)<gi.number_entry)
        {
            err = unzGoToNextFile(uf);
            if (err!=UNZ_OK)
            {
                printf("error %d with zipfile in unzGoToNextFile\n",err);
                break;
            }
        }
    }

    return 0;
}

int do_extract_onefile(uf,filename,opt_extract_without_path,opt_overwrite,password)
    unzFile uf;
    const char* filename;
    int opt_extract_without_path;
    int opt_overwrite;
    const char* password;
{
    int err = UNZ_OK;
    if (unzLocateFile(uf,filename,CASESENSITIVITY)!=UNZ_OK)
    {
        printf("file %s not found in the zipfile\n",filename);
        return 2;
    }

    if (do_extract_currentfile(uf,&opt_extract_without_path,
                                      &opt_overwrite,
                                      password) == UNZ_OK)
        return 0;
    else
        return 1;
}


int main(argc,argv)
    int argc;
    char *argv[];
{
    const char *zipfilename=NULL;
    const char *filename_to_extract=NULL;
    const char *password=NULL;
    char filename_try[MAXFILENAME+16] = "";
    int i;
    int opt_do_list=0;
    int opt_do_extract=1;
    int opt_do_extract_withoutpath=0;
    int opt_overwrite=0;
    int opt_extractdir=0;
    const char *dirname=NULL;
    unzFile uf=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=='l') || (c=='L'))
                        opt_do_list = 1;
                    if ((c=='v') || (c=='V'))
                        opt_do_list = 1;
                    if ((c=='x') || (c=='X'))
                        opt_do_extract = 1;
                    if ((c=='e') || (c=='E'))
                        opt_do_extract = opt_do_extract_withoutpath = 1;
                    if ((c=='o') || (c=='O'))
                        opt_overwrite=1;
                    if ((c=='d') || (c=='D'))
                    {
                        opt_extractdir=1;
                        dirname=argv[i+1];
                    }

                    if (((c=='p') || (c=='P')) && (i+1<argc))
                    {
                        password=argv[i+1];
                        i++;
                    }
                }
            }
            else
            {
                if (zipfilename == NULL)
                    zipfilename = argv[i];
                else if ((filename_to_extract==NULL) && (!opt_extractdir))
                        filename_to_extract = argv[i] ;
            }
        }
    }

    if (zipfilename!=NULL)
    {

#        ifdef USEWIN32IOAPI
        zlib_filefunc_def ffunc;
#        endif

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

#        ifdef USEWIN32IOAPI
        fill_win32_filefunc(&ffunc);
        uf = unzOpen2(zipfilename,&ffunc);
#        else
        uf = unzOpen(zipfilename);
#        endif
        if (uf==NULL)
        {
            strcat(filename_try,".zip");
#            ifdef USEWIN32IOAPI
            uf = unzOpen2(filename_try,&ffunc);
#            else
            uf = unzOpen(filename_try);
#            endif
        }
    }

    if (uf==NULL)
    {
        printf("Cannot open %s or %s.zip\n",zipfilename,zipfilename);
        return 1;
    }
    printf("%s opened\n",filename_try);

    if (opt_do_list==1)
        return do_list(uf);
    else if (opt_do_extract==1)
    {
        if (opt_extractdir && chdir(dirname)) 
        {
          printf("Error changing into %s, aborting\n", dirname);
          exit(-1);
        }

        if (filename_to_extract == NULL)
            return do_extract(uf,opt_do_extract_withoutpath,opt_overwrite,password);
        else
            return do_extract_onefile(uf,filename_to_extract,
                                      opt_do_extract_withoutpath,opt_overwrite,password);
    }
    unzCloseCurrentFile(uf);

    return 0;
}