/*
 * This file is part of uudeview, the simple and friendly multi-part multi-
 * file uudecoder  program  (c) 1994-2001 by Frank Pilhofer. The author may
 * be contacted at fp@fpx.de
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#ifdef SYSTEM_WINDLL
#include <windows.h>
#endif
#ifdef SYSTEM_OS2
#include <os2.h>
#endif

#include <sys/types.h>
#include <sys/stat.h>
#include <stdio.h>
#include <time.h>

#ifdef STDC_HEADERS
#include <stdlib.h>
#include <string.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_IO_H
#include <io.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif

#include <uudeview.h>
#include <uuint.h>
#include <fptools.h>
#include <uustring.h>
#include <gcrcall.h>

/* for braindead systems */
#ifndef SEEK_SET
#ifdef L_BEGIN
#define SEEK_SET L_BEGIN
#else
#define SEEK_SET 0
#endif
#endif

char * uuencode_id = "$Id$";

#if 0
/*
 * the End-Of-Line string. MIME enforces CRLF, so that's what we use. Some
 * implementations of uudecode will complain about a missing end line, since
 * they look for "end^J" but find "end^J^M". We don't care - especially be-
 * cause they still decode the file properly despite this complaint.
 */

#ifndef EOLSTRING
#define EOLSTRING   "\015\012"
#endif

#else

/*
 * Argh. Some delivery software (inews) has problems with the CRLF
 * line termination. Let's try native EOL and see if we run into
 * any problems.
 * This involves opening output files in text mode instead of binary
 */

#ifndef EOLSTRING
#define EOLSTRING   "\n"
#endif

#endif


/*
 * =========================================================================
 * User-configurable settings end here. Don't spy below unless you know what
 * you're doing.
 * =========================================================================
 */

/*
 * Define End-Of-Line sequence
 */

#ifdef EOLSTRING
static unsigned char *eolstring = (unsigned char *) EOLSTRING;
#else
static unsigned char *eolstring = (unsigned char *) "\012";
#endif

/*
 * Content-Transfer-Encoding types for non-MIME encodings
 */

#define CTE_UUENC   "x-uuencode"
#define CTE_XXENC   "x-xxencode"
#define CTE_BINHEX  "x-binhex"
#define CTE_YENC    "x-yenc"

#define CTE_TYPE(y) (((y)==B64ENCODED) ? "Base64"  : \
             ((y)==UU_ENCODED) ? CTE_UUENC : \
             ((y)==XX_ENCODED) ? CTE_XXENC : \
                         ((y)==PT_ENCODED) ? "8bit" : \
                         ((y)==QP_ENCODED) ? "quoted-printable" : \
             ((y)==BH_ENCODED) ? CTE_BINHEX : \
             ((y)==YENC_ENCODED) ? CTE_YENC : "x-oops")

/*
 * encoding tables
 */

unsigned char UUEncodeTable[64] = {
  '`', '!', '"', '#', '$', '%', '&', '\'',
  '(', ')', '*', '+', ',', '-', '.', '/',
  '0', '1', '2', '3', '4', '5', '6', '7',
  '8', '9', ':', ';', '<', '=', '>', '?',
  '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
  'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
  'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
  'X', 'Y', 'Z', '[', '\\',']', '^', '_'
};


unsigned char B64EncodeTable[64] = {
  'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
  'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
  'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
  'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
  'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
  'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
  'w', 'x', 'y', 'z', '0', '1', '2', '3',
  '4', '5', '6', '7', '8', '9', '+', '/'
};

unsigned char XXEncodeTable[64] = {
  '+', '-', '0', '1', '2', '3', '4', '5',
  '6', '7', '8', '9', 'A', 'B', 'C', 'D',
  'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L',
  'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
  'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b',
  'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
  'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
  's', 't', 'u', 'v', 'w', 'x', 'y', 'z'
};

unsigned char BHEncodeTable[64] = {
  '!', '"', '#', '$', '%', '&', '\'', '(',
  ')', '*', '+', ',', '-', '0', '1', '2',
  '3', '4', '5', '6', '8', '9', '@', 'A',
  'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
  'J', 'K', 'L', 'M', 'N', 'P', 'Q', 'R',
  'S', 'T', 'U', 'V', 'X', 'Y', 'Z', '[',
  '`', 'a', 'b', 'c', 'd', 'e', 'f', 'h',
  'i', 'j', 'k', 'l', 'm', 'p', 'q', 'r'
};

unsigned char HexEncodeTable[16] = {
  '0', '1', '2', '3', '4', '5', '6', '7',
  '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
};

typedef struct {
  char *extension;
  char *mimetype;
} mimemap;

/*
 * This table maps a file's extension into a Content-Type. The current
 * official list can be downloaded as
 *   ftp://ftp.isi.edu/in-notes/iana/assignments/media-type
 * I haven't listed any text types since it doesn't make sense to encode
 * them. Everything not on the list gets mapped to application/octet-stream
 */

static mimemap mimetable[] = {
    { "gif",  "image/gif"        }, /* Grafics Interchange Format  */
    { "jpg",  "image/jpeg"       }, /* JFIF encoded files          */
    { "jpeg", "image/jpeg"       },
    { "tif",  "image/tiff"       }, /* Tag Image File Format       */
    { "tiff", "image/tiff"       },
    { "cgm",  "image/cgm"        }, /* Computer Graphics Metafile  */
    { "au",   "audio/basic"      }, /* 8kHz ulaw audio data        */
    { "mov",  "video/quicktime"  }, /* Apple Quicktime             */
    { "qt",   "video/quicktime"  }, /* Also infrequently used      */
    { "mpeg", "video/mpeg"       }, /* Motion Picture Expert Group */
    { "mpg",  "video/mpeg"       },
    { "mp2",  "video/mpeg"       }, /* dito, MPEG-2 encoded files  */
    { "mp3",  "audio/mpeg"       }, /* dito, MPEG-3 encoded files  */
    { "ps",   "application/postscript" }, /* Postscript Language   */
    { "zip",  "application/zip"  }, /* ZIP archive                 */
    { "doc",  "application/msword"},/* assume Microsoft Word       */
    { NULL,   NULL               }
};

/*
 * the order of the following two tables must match the
 * Encoding Types definition in uudeview.h
 */

/*
 * encoded bytes per line
 */

static int bpl[8] = { 0, 45, 57, 45, 45, 0, 0, 128 };

/*
 * tables
 */

static unsigned char *etables[5] = {
  NULL,
  UUEncodeTable,
  B64EncodeTable,
  XXEncodeTable,
  BHEncodeTable
};

/*
 * variables to malloc upon initialization
 */

char *uuestr_itemp;
char *uuestr_otemp;

/*
 * Encode one part of the data stream
 */

static int
UUEncodeStream (FILE *outfile, FILE *infile, int encoding, long linperfile, dword *crc, dword *pcrc)
{
  unsigned char *itemp = (unsigned char *) uuestr_itemp;
  unsigned char *otemp = (unsigned char *) uuestr_otemp;
  unsigned char *optr, *table, *tptr;
  int index, count;
  long line=0;
  size_t llen;

  if (outfile==NULL || infile==NULL ||
      (encoding!=UU_ENCODED&&encoding!=XX_ENCODED&&encoding!=B64ENCODED&&
       encoding!=PT_ENCODED&&encoding!=QP_ENCODED&&encoding!=YENC_ENCODED)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_PARM_CHECK), "UUEncodeStream()");
    return UURET_ILLVAL;
  }

  /*
   * Special handling for plain text and quoted printable. Text is
   * read line oriented.
   */

  if (encoding == PT_ENCODED || encoding == QP_ENCODED) {
    while (!feof (infile) && (linperfile <= 0 || line < linperfile)) {
      if (_FP_fgets ((char *) itemp, 255, infile) == NULL) {
    break;
      }

      itemp[255] = '\0';
      count = strlen ((char *) itemp);

      llen = 0;
      optr = otemp;

      /*
       * Busy Callback
       */

      if (UUBUSYPOLL(ftell(infile)-progress.foffset,progress.fsize)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_NOTE,
           uustring (S_ENCODE_CANCEL));
    return UURET_CANCEL;
      }

      if (encoding == PT_ENCODED) {
    /*
     * If there is a line feed, replace by eolstring
     */
    if (count > 0 && itemp[count-1] == '\n') {
      itemp[--count] = '\0';
      if (fwrite (itemp, 1, count, outfile) != (unsigned)count ||
          fwrite ((char *) eolstring, 1,
              strlen((char *) eolstring), outfile) != strlen ((char *) eolstring)) {
        return UURET_IOERR;
      }
    }
    else {
      if (fwrite (itemp, 1, count, outfile) != llen) {
        return UURET_IOERR;
      }
    }
      }
      else if (encoding == QP_ENCODED) {
    for (index=0; index<count; index++) {
      if (llen == 0 && itemp[index] == '.') {
        /*
         * Special rule: encode '.' at the beginning of a line, so
         * that some mailers aren't confused.
         */
        *optr++ = '=';
        *optr++ = HexEncodeTable[itemp[index] >> 4];
        *optr++ = HexEncodeTable[itemp[index] & 0x0f];
        llen += 3;
      }
      else if ((itemp[index] >= 33 && itemp[index] <= 60) ||
           (itemp[index] >= 62 && itemp[index] <= 126) ||
           itemp[index] == 9 || itemp[index] == 32) {
        *optr++ = itemp[index];
        llen++;
      }
      else if (itemp[index] == '\n') {
        /*
         * If the last character before EOL was a space or tab,
         * we must encode it. If llen > 74, there's no space to do
         * that, so generate a soft line break instead.
         */

        if (index>0 && (itemp[index-1] == 9 || itemp[index-1] == 32)) {
          *(optr-1) = '=';
          if (llen <= 74) {
        *optr++ = HexEncodeTable[itemp[index-1] >> 4];
        *optr++ = HexEncodeTable[itemp[index-1] & 0x0f];
        llen += 2;
          }
        }

        if (fwrite (otemp, 1, llen, outfile) != llen ||
        fwrite ((char *) eolstring, 1,
            strlen((char *) eolstring), outfile) != strlen ((char *) eolstring)) {
          return UURET_IOERR;
        }

        /*
         * Fix the soft line break condition from above
         */

        if (index>0 && (itemp[index-1] == 9 || itemp[index-1] == 32) &&
        *(optr-1) == '=') {
          otemp[0] = '=';
          otemp[1] = HexEncodeTable[itemp[index-1] >> 4];
          otemp[2] = HexEncodeTable[itemp[index-1] & 0x0f];

          if (fwrite (otemp, 1, 3, outfile) != 3 ||
          fwrite ((char *) eolstring, 1,
              strlen((char *) eolstring), outfile) != strlen ((char *) eolstring)) {
        return UURET_IOERR;
          }
        }

        optr = otemp;
        llen = 0;
      }
      else {
        *optr++ = '=';
        *optr++ = HexEncodeTable[itemp[index] >> 4];
        *optr++ = HexEncodeTable[itemp[index] & 0x0f];
        llen += 3;
      }

      /*
       * Lines must be shorter than 76 characters (not counting CRLF).
       * If the line grows longer than that, we must include a soft
       * line break.
       */

      if (itemp[index+1] != 0 && itemp[index+1] != '\n' &&
          (llen >= 75 ||
           (!((itemp[index+1] >= 33 && itemp[index+1] <= 60) ||
          (itemp[index+1] >= 62 && itemp[index+1] <= 126)) &&
        llen >= 73))) {

        *optr++ = '=';
        llen++;
    
        if (fwrite (otemp, 1, llen, outfile) != llen ||
        fwrite ((char *) eolstring, 1,
            strlen((char *) eolstring), outfile) != strlen ((char *) eolstring)) {
          return UURET_IOERR;
        }
    
        optr = otemp;
        llen = 0;
      }
    }
      }

      line++;
    }

    return UURET_OK;
  }

  /*
   * Special handling for yEnc
   */

  if (encoding == YENC_ENCODED) {
    llen = 0;
    optr = otemp;

    while (!feof (infile) && (linperfile <= 0 || line < linperfile)) {
      if ((count = fread (itemp, 1, 128, infile)) != 128) {
    if (count == 0) {
      break;
    }
    else if (ferror (infile)) {
      return UURET_IOERR;
    }
      }

      if (pcrc) *pcrc = memCrc32(*pcrc, itemp, count, false, CRC32_MASK_CCITT);
      if (crc) *crc = memCrc32(*crc, itemp, count, false, CRC32_MASK_CCITT);

      line++;

      /*
       * Busy Callback
       */

      if (UUBUSYPOLL(ftell(infile)-progress.foffset,progress.fsize)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_NOTE,
           uustring (S_ENCODE_CANCEL));
    return UURET_CANCEL;
      }

      for (index=0; index<count; index++) {
    if (llen > 127) {
      if (fwrite (otemp, 1, llen, outfile) != llen ||
          fwrite ((char *) eolstring, 1,
              strlen((char *) eolstring), outfile) != strlen ((char *) eolstring)) {
        return UURET_IOERR;
      }
      llen = 0;
      optr = otemp;
    }

    switch ((char) ((int) itemp[index] + 42)) {
    case '\0':
    case '\t':
    case '\n':
    case '\r':
    case '=':
    case '\033':
      *optr++ = '=';
      *optr++ = (char) ((int) itemp[index] + 42 + 64);
      llen += 2;
      break;

    case '.':
      if (llen == 0) {
        *optr++ = '=';
        *optr++ = (char) ((int) itemp[index] + 42 + 64);
        llen += 2;
      }
      else {
        *optr++ = (char) ((int) itemp[index] + 42);
        llen++;
      }
      break;

    default:
      *optr++ = (char) ((int) itemp[index] + 42);
      llen++;
      break;
    }
      }
    }

    /*
     * write last line
     */

    if (llen) {
      if (fwrite (otemp, 1, llen, outfile) != llen ||
      fwrite ((char *) eolstring, 1,
          strlen((char *) eolstring), outfile) != strlen ((char *) eolstring)) {
    return UURET_IOERR;
      }
    }

    return UURET_OK;
  }

  /*
   * Handling for binary encodings
   */

  /*
   * select charset
   */

  table = etables[encoding];

  if (table==NULL || bpl[encoding]==0) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
               uustring (S_PARM_CHECK), "UUEncodeStream()");
    return UURET_ILLVAL;
  }

  while (!feof (infile) && (linperfile <= 0 || line < linperfile)) {
    if ((count = fread (itemp, 1, bpl[encoding], infile)) != bpl[encoding]) {
      if (count == 0)
    break;
      else if (ferror (infile))
    return UURET_IOERR;
    }

    optr = otemp;
    llen = 0;

    /*
     * Busy Callback
     */

    if (UUBUSYPOLL(ftell(infile)-progress.foffset,progress.fsize)) {
      UUMessage (uuencode_id, __LINE__, UUMSG_NOTE,
         uustring (S_ENCODE_CANCEL));
      return UURET_CANCEL;
    }

    /*
     * for UU and XX, encode the number of bytes as first character
     */

    if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
      *optr++ = table[count];
      llen++;
    }

    /*
     * Main encoding
     */

    for (index=0; index<=count-3; index+=3, llen+=4) {
      *optr++ = table[itemp[index] >> 2];
      *optr++ = table[((itemp[index  ] & 0x03) << 4)|(itemp[index+1] >> 4)];
      *optr++ = table[((itemp[index+1] & 0x0f) << 2)|(itemp[index+2] >> 6)];
      *optr++ = table[  itemp[index+2] & 0x3f];
    }

    /*
     * Special handling for incomplete lines
     */

    if (index != count) {
      if (encoding == B64ENCODED) {
    if (count - index == 2) {
      *optr++ = table[itemp[index] >> 2];
      *optr++ = table[((itemp[index  ] & 0x03) << 4) |
              ((itemp[index+1] & 0xf0) >> 4)];
      *optr++ = table[((itemp[index+1] & 0x0f) << 2)];
      *optr++ = '=';
    }
    else if (count - index == 1) {
      *optr++ = table[ itemp[index] >> 2];
      *optr++ = table[(itemp[index] & 0x03) << 4];
      *optr++ = '=';
      *optr++ = '=';
    }
    llen += 4;
      }
      else if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
    if (count - index == 2) {
      *optr++ = table[itemp[index] >> 2];
      *optr++ = table[((itemp[index  ] & 0x03) << 4) |
              ( itemp[index+1] >> 4)];
      *optr++ = table[((itemp[index+1] & 0x0f) << 2)];
      *optr++ = table[0];
    }
    else if (count - index == 1) {
      *optr++ = table[ itemp[index] >> 2];
      *optr++ = table[(itemp[index] & 0x03) << 4];
      *optr++ = table[0];
      *optr++ = table[0];
    }
    llen += 4;
      }
    }

    /*
     * end of line
     */

    tptr = eolstring;

    while (*tptr)
      *optr++ = *tptr++;

    *optr++ = '\0';
    llen   += strlen ((char *) eolstring);

    if (fwrite (otemp, 1, llen, outfile) != llen)
      return UURET_IOERR;

    line++;
  }
  return UURET_OK;
}

/*
 * Encode as MIME multipart/mixed sub-message.
 */

int UUEXPORT
UUEncodeMulti (FILE *outfile, FILE *infile, char *infname, int encoding,
           char *outfname, char *mimetype, int filemode)
{
  mimemap *miter=mimetable;
  struct stat finfo;
  int res, themode;
  FILE *theifile;
  char *ptr;
  dword  crc;
  dword *crcptr=NULL;

  if (outfile==NULL ||
      (infile == NULL && infname==NULL) ||
      (outfname==NULL && infname==NULL) ||
      (encoding!=UU_ENCODED&&encoding!=XX_ENCODED&&encoding!=B64ENCODED&&
       encoding!=PT_ENCODED&&encoding!=QP_ENCODED&&encoding!=YENC_ENCODED)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_PARM_CHECK), "UUEncodeMulti()");
    return UURET_ILLVAL;
  }

  progress.action = 0;

  if (infile==NULL) {
    if (stat (infname, &finfo) == -1) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_NOT_STAT_FILE),
         infname, strerror (uu_errno=errno));
      return UURET_IOERR;
    }
    if ((theifile = fopen (infname, "rb")) == NULL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_NOT_OPEN_FILE),
         infname, strerror (uu_errno=errno));
      return UURET_IOERR;
    }
    themode = (filemode) ? filemode : ((int) finfo.st_mode & 0777);
    progress.fsize = (long) finfo.st_size;
  }
  else {
    if (fstat (fileno (infile), &finfo) != 0) {
      themode  = (filemode)?filemode:0644;
      progress.fsize = -1;
    }
    else {
      themode = (int) finfo.st_mode & 0777;
      progress.fsize = (long) finfo.st_size;
    }
    theifile = infile;
  }

  if (progress.fsize < 0)
    progress.fsize = -1;

  _FP_strncpy (progress.curfile, (outfname)?outfname:infname, 256);

  progress.partno   = 1;
  progress.numparts = 1;
  progress.percent  = 0;
  progress.foffset  = 0;
  progress.action   = UUACT_ENCODING;

  /*
   * If not given from outside, select an appropriate Content-Type by
   * looking at the file's extension. If it is unknown, default to
   * Application/Octet-Stream
   */

  if (mimetype == NULL) {
    if ((ptr = _FP_strrchr ((outfname)?outfname:infname, '.'))) {
      while (miter->extension && _FP_stricmp (ptr+1, miter->extension) != 0)
    miter++;
      mimetype = miter->mimetype;
    }
  }

  if (mimetype == NULL && (encoding == PT_ENCODED || encoding == QP_ENCODED)) {
    mimetype = "text/plain";
  }

  /*
   * print sub-header
   */

  if (encoding != YENC_ENCODED) {
    fprintf (outfile, "Content-Type: %s%s",
         (mimetype)?mimetype:"Application/Octet-Stream",
         (char *) eolstring);
    fprintf (outfile, "Content-Transfer-Encoding: %s%s",
         CTE_TYPE(encoding), (char *) eolstring);
    fprintf (outfile, "Content-Disposition: attachment; filename=\"%s\"%s",
         UUFNameFilter ((outfname)?outfname:infname), (char *) eolstring);
    fprintf (outfile, "%s", (char *) eolstring);
  }

  if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
    fprintf (outfile, "begin %o %s%s",
         (themode) ? themode : 0644,
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    crc = 0;
    crcptr = &crc;
    if (progress.fsize == -1) {
      fprintf (outfile, "=ybegin line=128 name=%s%s",
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
    else {
      fprintf (outfile, "=ybegin line=128 size=%ld name=%s%s",
           progress.fsize,
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
  }

  if ((res = UUEncodeStream (outfile, theifile, encoding, 0, crcptr, NULL)) != UURET_OK) {
    if (res != UURET_CANCEL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_ERR_ENCODING),
         UUFNameFilter ((infname)?infname:outfname),
         (res==UURET_IOERR)?strerror(uu_errno):UUstrerror(res));
    }
    progress.action = 0;
    return res;
  }

  if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
    fprintf (outfile, "%c%s",
         (encoding==UU_ENCODED) ? UUEncodeTable[0] : XXEncodeTable[0],
         (char *) eolstring);
    fprintf (outfile, "end%s", (char *) eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    if (progress.fsize == -1) {
      fprintf (outfile, "=yend crc32=%08lx%s",
           crc,
           (char *) eolstring);
    }
    else {
      fprintf (outfile, "=yend size=%ld crc32=%08lx%s",
           progress.fsize,
           crc,
           (char *) eolstring);
    }
  }

  /*
   * empty line at end does no harm
   */

  fprintf (outfile, "%s", (char *) eolstring);

  if (infile==NULL)
    fclose (theifile);

  progress.action = 0;
  return UURET_OK;
}

/*
 * Encode as MIME message/partial
 */

int UUEXPORT
UUEncodePartial (FILE *outfile, FILE *infile,
         char *infname, int encoding,
         char *outfname, char *mimetype,
         int filemode, int partno, long linperfile,
         dword *crcptr)
{
  mimemap *miter=mimetable;
  static FILE *theifile;
  int themode, numparts = 1;
  struct stat finfo;
  long thesize;
  char *ptr;
  int res;
  dword  pcrc;
  dword *pcrcptr=NULL;

  if ((outfname==NULL&&infname==NULL) || partno<=0 ||
      (infile == NULL&&infname==NULL) || outfile==NULL ||
      (encoding!=UU_ENCODED&&encoding!=XX_ENCODED&&encoding!=B64ENCODED&&
       encoding!=PT_ENCODED&&encoding!=QP_ENCODED&&encoding!=YENC_ENCODED)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_PARM_CHECK), "UUEncodePartial()");
    return UURET_ILLVAL;
  }

  /*
   * The first part needs a set of headers
   */

  progress.action = 0;

  if (partno == 1) {
    if (infile==NULL) {
      if (stat (infname, &finfo) == -1) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_NOT_STAT_FILE),
           infname, strerror (uu_errno=errno));
    return UURET_IOERR;
      }
      if ((theifile = fopen (infname, "rb")) == NULL) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_NOT_OPEN_FILE),
           infname, strerror (uu_errno=errno));
    return UURET_IOERR;
      }
      if (linperfile <= 0)
    numparts = 1;
      else
    numparts = (int) (((long)finfo.st_size+(linperfile*bpl[encoding]-1))/
              (linperfile*bpl[encoding]));

      themode  = (filemode) ? filemode : ((int) finfo.st_mode & 0777);
      thesize  = (long) finfo.st_size;
    }
    else {
      if (fstat (fileno (infile), &finfo) != 0) {
    UUMessage (uuencode_id, __LINE__, UUMSG_WARNING,
           uustring (S_STAT_ONE_PART));
    numparts = 1;
    themode  = (filemode)?filemode:0644;
    thesize  = -1;
      }
      else {
    if (linperfile <= 0)
      numparts = 1;
    else
      numparts = (int) (((long)finfo.st_size+(linperfile*bpl[encoding]-1))/
                (linperfile*bpl[encoding]));

    themode =  (int) finfo.st_mode & 0777;
    thesize = (long) finfo.st_size;
      }
      theifile = infile;
    }

    _FP_strncpy (progress.curfile, (outfname)?outfname:infname, 256);

    progress.totsize  = (thesize>=0) ? thesize : -1;
    progress.partno   = 1;
    progress.numparts = numparts;
    progress.percent  = 0;
    progress.foffset  = 0;

    /*
     * If not given from outside, select an appropriate Content-Type by
     * looking at the file's extension. If it is unknown, default to
     * Application/Octet-Stream
     */

    if (mimetype == NULL) {
      if ((ptr = _FP_strrchr ((outfname)?outfname:infname, '.'))) {
    while (miter->extension && _FP_stricmp (ptr+1, miter->extension) != 0)
      miter++;
    mimetype = miter->mimetype;
      }
    }

    if (mimetype == NULL && (encoding==PT_ENCODED || encoding==QP_ENCODED)) {
      mimetype = "text/plain";
    }

    /*
     * print sub-header
     */

    if (encoding != YENC_ENCODED) {
      fprintf (outfile, "MIME-Version: 1.0%s", (char *) eolstring);
      fprintf (outfile, "Content-Type: %s%s",
           (mimetype)?mimetype:"Application/Octet-Stream",
           (char *) eolstring);
      fprintf (outfile, "Content-Transfer-Encoding: %s%s",
           CTE_TYPE(encoding), (char *) eolstring);
      fprintf (outfile, "Content-Disposition: attachment; filename=\"%s\"%s",
           UUFNameFilter ((outfname)?outfname:infname), (char *) eolstring);
    }

    fprintf (outfile, "%s", (char *) eolstring);

    /*
     * for the first part of UU or XX messages, print a begin line
     */

    if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
      fprintf (outfile, "begin %o %s%s",
           (themode) ? themode : ((filemode)?filemode:0644),
           UUFNameFilter ((outfname)?outfname:infname), (char *) eolstring);
    }
  }
  if (encoding == YENC_ENCODED) {
    pcrc = 0;
    pcrcptr = &pcrc;
    if (numparts != 1) {
      if (progress.totsize == -1) {
    fprintf (outfile, "=ybegin part=%d line=128 name=%s%s",
         partno,
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
      }
      else {
    fprintf (outfile, "=ybegin part=%d line=128 size=%ld name=%s%s",
         partno,
         progress.totsize,
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
      }

      fprintf (outfile, "=ypart begin=%ld end=%ld%s",
           (partno-1)*linperfile*128+1,
           (partno*linperfile*128) < progress.totsize ?
           (partno*linperfile*128) : progress.totsize,
           (char *) eolstring);
    }
    else {
      if (progress.totsize == -1) {
    fprintf (outfile, "=ybegin line=128 name=%s%s",
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
      }
      else {
    fprintf (outfile, "=ybegin line=128 size=%ld name=%s%s",
         progress.totsize,
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
      }
    }
  }

  /*
   * update progress information
   */

  progress.partno  = partno;
  progress.percent = 0;
  progress.foffset = ftell (theifile);

  if (progress.totsize <= 0)
    progress.fsize = -1;
  else if (linperfile <= 0)
    progress.fsize = progress.totsize;
  else if (progress.foffset+linperfile*bpl[encoding] > progress.totsize)
    progress.fsize = progress.totsize - progress.foffset;
  else
    progress.fsize = linperfile*bpl[encoding];

  progress.action  = UUACT_ENCODING;

  if ((res = UUEncodeStream (outfile, theifile, encoding, linperfile,
                 crcptr, pcrcptr)) != UURET_OK) {
    if (infile==NULL) fclose (theifile);
    if (res != UURET_CANCEL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_ERR_ENCODING),
         UUFNameFilter ((outfname)?outfname:infname),
         (res==UURET_IOERR)?strerror(uu_errno):UUstrerror (res));
    }
    progress.action = 0;
    return res;
  }

  /*
   * print end line
   */

  if (feof (theifile) &&
      (encoding == UU_ENCODED || encoding == XX_ENCODED)) {
    fprintf (outfile, "%c%s",
         (encoding==UU_ENCODED) ? UUEncodeTable[0] : XXEncodeTable[0],
         (char *) eolstring);
    fprintf (outfile, "end%s", (char *) eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    if (numparts != 1) {
      fprintf (outfile, "=yend size=%ld part=%d pcrc32=%08lx",
           (partno*linperfile*128) < progress.totsize ?
           linperfile*128 : (progress.totsize-(partno-1)*linperfile*128),
           partno,
           pcrc);
    }
    else {
      fprintf (outfile, "=yend size=%ld",
           progress.totsize);
    }
    if (feof (theifile))
      fprintf (outfile, " crc32=%08lx", *crcptr);
    fprintf (outfile, "%s", (char *) eolstring);
  }

  /*
   * empty line at end does no harm
   */

  if (encoding != PT_ENCODED && encoding != QP_ENCODED) {
    fprintf (outfile, "%s", (char *) eolstring);
  }

  if (infile==NULL) {
    if (res != UURET_OK) {
      progress.action = 0;
      fclose (theifile);
      return res;
    }
    if (feof (theifile)) {
      progress.action = 0;
      fclose (theifile);
      return UURET_OK;
    }
    return UURET_CONT;
  }

  /*
   * leave progress.action as-is
   */

  return UURET_OK;
}

/*
 * send output to a stream, don't do any headers at all
 */

int UUEXPORT
UUEncodeToStream (FILE *outfile, FILE *infile,
          char *infname, int encoding,
          char *outfname, int filemode)
{
  struct stat finfo;
  FILE *theifile;
  int themode;
  int res;
  dword  crc;
  dword *crcptr=NULL;

  if (outfile==NULL ||
      (infile == NULL&&infname==NULL) ||
      (outfname==NULL&&infname==NULL) ||
      (encoding!=UU_ENCODED&&encoding!=XX_ENCODED&&encoding!=B64ENCODED&&
       encoding!=PT_ENCODED&&encoding!=QP_ENCODED&&encoding!=YENC_ENCODED)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_PARM_CHECK), "UUEncodeToStream()");
    return UURET_ILLVAL;
  }

  progress.action = 0;

  if (infile==NULL) {
    if (stat (infname, &finfo) == -1) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_NOT_STAT_FILE),
         infname, strerror (uu_errno=errno));
      return UURET_IOERR;
    }
    if ((theifile = fopen (infname, "rb")) == NULL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_NOT_OPEN_FILE),
         infname, strerror (uu_errno=errno));
      return UURET_IOERR;
    }
    themode = (filemode) ? filemode : ((int) finfo.st_mode & 0777);
    progress.fsize = (long) finfo.st_size;
  }
  else {
    if (fstat (fileno (infile), &finfo) == -1) {
      /* gotta live with it */
      themode = 0644;
      progress.fsize = -1;
    }
    else {
      themode = (filemode) ? filemode : ((int) finfo.st_mode & 0777);
      progress.fsize = (long) finfo.st_size;
    }
    theifile = infile;
  }

  if (progress.fsize < 0)
    progress.fsize = -1;

  _FP_strncpy (progress.curfile, (outfname)?outfname:infname, 256);

  progress.partno   = 1;
  progress.numparts = 1;
  progress.percent  = 0;
  progress.foffset  = 0;
  progress.action   = UUACT_ENCODING;

  if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
    fprintf (outfile, "begin %o %s%s",
         (themode) ? themode : 0644,
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    crc = 0;
    crcptr = &crc;
    if (progress.fsize == -1) {
      fprintf (outfile, "=ybegin line=128 name=%s%s",
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
    else {
      fprintf (outfile, "=ybegin line=128 size=%ld name=%s%s",
           progress.fsize,
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
  }

  if ((res = UUEncodeStream (outfile, theifile, encoding, 0, crcptr, NULL)) != UURET_OK) {
    if (res != UURET_CANCEL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_ERR_ENCODING),
         UUFNameFilter ((infname)?infname:outfname),
         (res==UURET_IOERR)?strerror(uu_errno):UUstrerror (res));
    }
    progress.action = 0;
    return res;
  }

  if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
    fprintf (outfile, "%c%s",
         (encoding==UU_ENCODED) ? UUEncodeTable[0] : XXEncodeTable[0],
         (char *) eolstring);
    fprintf (outfile, "end%s", (char *) eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    if (progress.fsize == -1) {
      fprintf (outfile, "=yend crc32=%08lx%s",
           crc,
           (char *) eolstring);
    }
    else {
      fprintf (outfile, "=yend size=%ld crc32=%08lx%s",
           progress.fsize,
           crc,
           (char *) eolstring);
    }
  }

  /*
   * empty line at end does no harm
   */

  fprintf (outfile, "%s", (char *) eolstring);

  if (infile==NULL) fclose (theifile);
  progress.action = 0;

  return UURET_OK;
}

/*
 * Encode to files on disk, don't generate any headers
 */

int UUEXPORT
UUEncodeToFile (FILE *infile, char *infname, int encoding,
        char *outfname, char *diskname, long linperfile)
{
  int part, numparts, len, filemode, res;
  char *oname=NULL, *optr, *ptr;
  FILE *theifile, *outfile;
  struct stat finfo;
  dword  pcrc, crc;
  dword *pcrcptr=NULL, *crcptr=NULL;

  if ((diskname==NULL&&infname==NULL) ||
      (outfname==NULL&&infname==NULL) || (infile==NULL&&infname==NULL) ||
      (encoding!=UU_ENCODED&&encoding!=XX_ENCODED&&encoding!=B64ENCODED&&
       encoding!=PT_ENCODED&&encoding!=QP_ENCODED&&encoding!=YENC_ENCODED)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_PARM_CHECK), "UUEncodeToFile()");
    return UURET_ILLVAL;
  }

  if (diskname) {
    if ((ptr = strchr (diskname, '/')) == NULL)
      ptr = strchr (diskname, '\\');
    if (ptr) {
      len = strlen (diskname) + ((uuencodeext)?strlen(uuencodeext):3) + 5;

      if ((oname = (char*)malloc (len)) == NULL) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_OUT_OF_MEMORY), len);
    return UURET_NOMEM;
      }
      sprintf (oname, "%s", diskname);
    }
    else {
      len = ((uusavepath)?strlen(uusavepath):0) + strlen (diskname)
    + ((uuencodeext)?strlen(uuencodeext):0) + 5;

      if ((oname = (char*)malloc (len)) == NULL) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_OUT_OF_MEMORY), len);
    return UURET_NOMEM;
      }
      sprintf (oname, "%s%s", (uusavepath)?uusavepath:"", diskname);
    }
  }
  else {
    len = ((uusavepath) ? strlen (uusavepath) : 0) +
      strlen(UUFNameFilter(infname)) +
    ((uuencodeext)?strlen(uuencodeext):0) + 5;

    if ((oname = (char*)malloc (len)) == NULL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_OUT_OF_MEMORY), len);
      return UURET_NOMEM;
    }
    optr = UUFNameFilter (infname);
    sprintf (oname, "%s%s",
         (uusavepath)?uusavepath:"",
         (*optr=='.')?optr+1:optr);
  }

  /*
   * optr points after the last dot, so that we can print the part number
   * there.
   */

  optr = _FP_strrchr (oname, '.');
  if (optr==NULL || strchr (optr, '/')!=NULL || strchr (optr, '\\')!=NULL) {
    optr = oname + strlen (oname);
    *optr++ = '.';
  }
  else if (optr==oname || *(optr-1)=='/' || *(optr-1)=='\\') {
    optr = oname + strlen (oname);
    *optr++ = '.';
  }
  else
    optr++;

  progress.action = 0;

  if (infile==NULL) {
    if (stat (infname, &finfo) == -1) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_NOT_STAT_FILE),
         infname, strerror (uu_errno=errno));
      _FP_free (oname);
      return UURET_IOERR;
    }
    if ((theifile = fopen (infname, "rb")) == NULL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_NOT_OPEN_FILE),
         infname, strerror (uu_errno=errno));
      _FP_free (oname);
      return UURET_IOERR;
    }
    if (linperfile <= 0)
      numparts = 1;
    else
      numparts = (int) (((long)finfo.st_size + (linperfile*bpl[encoding]-1)) /
            (linperfile*bpl[encoding]));

    filemode = (int) finfo.st_mode & 0777;
    progress.totsize = (long) finfo.st_size;
  }
  else {
    if (fstat (fileno (infile), &finfo) == -1) {
      /* gotta live with it */
      filemode = 0644;
      numparts = -1;
      progress.totsize = -1;
    }
    else {
      if (linperfile <= 0)
    numparts = 1;
      else
    numparts = (int) (((long)finfo.st_size+(linperfile*bpl[encoding]-1))/
              (linperfile*bpl[encoding]));

      filemode = (int) finfo.st_mode & 0777;
      progress.totsize = -1;
    }
    theifile = infile;
  }

  _FP_strncpy (progress.curfile, (outfname)?outfname:infname, 256);

  progress.totsize  = (progress.totsize<0) ? -1 : progress.totsize;
  progress.numparts = numparts;

  for (part=1; !feof (theifile); part++) {
    /*
     * Attach extension
     */
    if (progress.numparts==1 && progress.totsize!=-1 && uuencodeext!=NULL)
      strcpy  (optr, uuencodeext);
    else
      sprintf (optr, "%03d", part);

    /*
     * check if target file exists
     */

    if (!uu_overwrite) {
      if (stat (oname, &finfo) == 0) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_TARGET_EXISTS), oname);
    if (infile==NULL) fclose (theifile);
    progress.action = 0;
    free (oname);
    return UURET_EXISTS;
      }
    }

    /*
     * update progress information
     */

    progress.action  = 0;
    progress.partno  = part;
    progress.percent = 0;
    progress.foffset = ftell (theifile);

    if (progress.totsize == -1)
      progress.fsize = -1;
    else if (linperfile <= 0)
      progress.fsize = progress.totsize;
    else if (progress.foffset+linperfile*bpl[encoding] > progress.totsize)
      progress.fsize = progress.totsize - progress.foffset;
    else
      progress.fsize = linperfile*bpl[encoding];

    progress.action  = UUACT_ENCODING;

    if ((outfile = fopen (oname, "w")) == NULL) {
      UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
         uustring (S_NOT_OPEN_TARGET),
         oname, strerror (uu_errno = errno));
      if (infile==NULL) fclose (theifile);
      progress.action = 0;
      free (oname);
      return UURET_IOERR;
    }

    if (encoding != YENC_ENCODED) {
      fprintf (outfile, "%s", (char *) eolstring);
      fprintf (outfile, "_=_ %s", (char *) eolstring);
      if (numparts == -1)
    fprintf (outfile, "_=_ Part %03d of file %s%s",
         part, UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
      else
    fprintf (outfile, "_=_ Part %03d of %03d of file %s%s",
         part, numparts,
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
      fprintf (outfile, "_=_ %s", (char *) eolstring);
      fprintf (outfile, "%s", (char *) eolstring);
    }

    if (part==1 && (encoding == UU_ENCODED || encoding == XX_ENCODED)) {
      fprintf (outfile, "begin %o %s%s",
           (filemode)?filemode : 0644,
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
    else if (encoding == YENC_ENCODED) {
      if (!crcptr) {
        crc = 0;
        crcptr = &crc;
      }
      pcrc = 0;
      pcrcptr = &pcrc;
      if (numparts != 1) {
    if (progress.totsize == -1) {
      fprintf (outfile, "=ybegin part=%d line=128 name=%s%s",
           part,
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
    else {
      fprintf (outfile, "=ybegin part=%d line=128 size=%ld name=%s%s",
           part,
           progress.totsize,
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }

    fprintf (outfile, "=ypart begin=%ld end=%ld%s",
         (part-1)*linperfile*128+1,
         (part*linperfile*128) < progress.totsize ?
         (part*linperfile*128) : progress.totsize,
         (char *) eolstring);
      }
      else {
    if (progress.totsize == -1) {
      fprintf (outfile, "=ybegin line=128 name=%s%s",
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
    else {
      fprintf (outfile, "=ybegin line=128 size=%ld name=%s%s",
           progress.totsize,
           UUFNameFilter ((outfname)?outfname:infname),
           (char *) eolstring);
    }
      }
    }

    if ((res = UUEncodeStream (outfile, theifile,
                   encoding, linperfile, crcptr, pcrcptr)) != UURET_OK) {
      if (res != UURET_CANCEL) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_ERR_ENCODING),
           UUFNameFilter ((infname)?infname:outfname),  
           (res==UURET_IOERR)?strerror(uu_errno):UUstrerror (res));
      }
      if (infile==NULL) fclose (theifile);
      progress.action = 0;
      fclose (outfile);
      unlink (oname);
      _FP_free (oname);
      return res;
    }

    if (feof (theifile) &&
    (encoding == UU_ENCODED || encoding == XX_ENCODED)) {
      fprintf (outfile, "%c%s",
           (encoding==UU_ENCODED) ? UUEncodeTable[0] : XXEncodeTable[0],
           (char *) eolstring);
      fprintf (outfile, "end%s", (char *) eolstring);
    }
    else if (encoding == YENC_ENCODED) {
      if (numparts != 1) {
    fprintf (outfile, "=yend size=%ld part=%d pcrc32=%08lx",
         (part*linperfile*128) < progress.totsize ?
         linperfile*128 : (progress.totsize-(part-1)*linperfile*128),
         part,
         pcrc);
      }
      else {
    fprintf (outfile, "=yend size=%ld",
         progress.totsize);
      }
      if (feof (theifile))
    fprintf (outfile, " crc32=%08lx", crc);
      fprintf (outfile, "%s", (char *) eolstring);
    }

    /*
     * empty line at end does no harm
     */

    fprintf (outfile, "%s", (char *) eolstring);
    fclose  (outfile);
  }

  if (infile==NULL) fclose (theifile);
  progress.action = 0;
  _FP_free (oname);
  return UURET_OK;
}

/*
 * Encode a MIME Mail message or Newsgroup posting and send to a
 * stream. Still needs a somewhat smart MDA, since we only gene-
 * rate a minimum set of headers.
 */

int UUEXPORT
UUE_PrepSingle (FILE *outfile, FILE *infile,
        char *infname, int encoding,
        char *outfname, int filemode,
        char *destination, char *from,
        char *subject, int isemail)
{
  return UUE_PrepSingleExt (outfile, infile,
                infname, encoding,
                outfname, filemode,
                destination, from,
                subject, NULL,
                isemail);
}

int UUEXPORT
UUE_PrepSingleExt (FILE *outfile, FILE *infile,
           char *infname, int encoding,
           char *outfname, int filemode,
           char *destination, char *from,
           char *subject, char *replyto,
           int isemail)
{
  mimemap *miter=mimetable;
  char *subline, *oname;
  char *mimetype, *ptr;
  int res, len;

  if ((outfname==NULL&&infname==NULL) || (infile==NULL&&infname==NULL) ||
      (encoding!=UU_ENCODED&&encoding!=XX_ENCODED&&encoding!=B64ENCODED&&
       encoding!=PT_ENCODED&&encoding!=QP_ENCODED&&encoding!=YENC_ENCODED)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_PARM_CHECK), "UUE_PrepSingle()");
    return UURET_ILLVAL;
  }

  oname = UUFNameFilter ((outfname)?outfname:infname);
  len   = ((subject)?strlen(subject):0) + strlen(oname) + 40;

  if ((ptr = _FP_strrchr (oname, '.'))) {
    while (miter->extension && _FP_stricmp (ptr+1, miter->extension) != 0)
      miter++;
    mimetype = miter->mimetype;
  }
  else
    mimetype = NULL;

  if (mimetype == NULL && (encoding == PT_ENCODED || encoding == QP_ENCODED)) {
    mimetype = "text/plain";
  }

  if ((subline = (char *) malloc (len)) == NULL) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_OUT_OF_MEMORY), len);
    return UURET_NOMEM;
  }

  if (encoding == YENC_ENCODED) {
    if (subject)
      sprintf (subline, "- %s - %s (001/001)", oname, subject);
    else
      sprintf (subline, "- %s - (001/001)", oname);
  }
  else {
    if (subject)
      sprintf (subline, "%s (001/001) - [ %s ]", subject, oname);
    else
      sprintf (subline, "[ %s ] (001/001)", oname);
  }

  if (from) {
    fprintf (outfile, "From: %s%s", from, (char *) eolstring);
  }
  if (destination) {
    fprintf (outfile, "%s: %s%s",
         (isemail)?"To":"Newsgroups",
         destination, (char *) eolstring);
  }

  fprintf (outfile, "Subject: %s%s", subline, (char *) eolstring);

  if (replyto) {
    fprintf (outfile, "Reply-To: %s%s", replyto, (char *) eolstring);
  }

  if (encoding != YENC_ENCODED) {
    fprintf (outfile, "MIME-Version: 1.0%s", (char *) eolstring);
    fprintf (outfile, "Content-Type: %s; name=\"%s\"%s",
         (mimetype)?mimetype:"Application/Octet-Stream",
         UUFNameFilter ((outfname)?outfname:infname),
         (char *) eolstring);
    fprintf (outfile, "Content-Transfer-Encoding: %s%s",
         CTE_TYPE(encoding), (char *) eolstring);
  }

  fprintf (outfile, "%s", (char *) eolstring);

  res = UUEncodeToStream (outfile, infile, infname, encoding,
              outfname, filemode);

  _FP_free (subline);
  return res;
}

int UUEXPORT
UUE_PrepPartial (FILE *outfile, FILE *infile,
         char *infname, int encoding,
         char *outfname, int filemode,
         int partno, long linperfile, long filesize,
         char *destination, char *from, char *subject,
         int isemail)
{
  return UUE_PrepPartialExt (outfile, infile,
                 infname, encoding,
                 outfname, filemode,
                 partno, linperfile, filesize,
                 destination,
                 from, subject, NULL,
                 isemail);
}

int UUEXPORT
UUE_PrepPartialExt (FILE *outfile, FILE *infile,
            char *infname, int encoding,
            char *outfname, int filemode,
            int partno, long linperfile, long filesize,
            char *destination,
            char *from, char *subject, char *replyto,
            int isemail)
{
  static int numparts, themode;
  static char mimeid[64];
  static FILE *theifile;
  struct stat finfo;
  char *subline, *oname;
  long thesize;
  int res, len;
  static dword crc;
  dword *crcptr=NULL;

  if ((outfname==NULL&&infname==NULL) || (infile==NULL&&infname==NULL) ||
      (encoding!=UU_ENCODED&&encoding!=XX_ENCODED&&encoding!=B64ENCODED&&
       encoding!=PT_ENCODED&&encoding!=QP_ENCODED&&encoding!=YENC_ENCODED)) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_PARM_CHECK), "UUE_PrepPartial()");
    return UURET_ILLVAL;
  }

  oname = UUFNameFilter ((outfname)?outfname:infname);
  len   = ((subject)?strlen(subject):0) + strlen (oname) + 40;

  /*
   * if first part, get information about the file
   */

  if (partno == 1) {
    if (infile==NULL) {
      if (stat (infname, &finfo) == -1) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_NOT_STAT_FILE),
           infname, strerror (uu_errno=errno));
    return UURET_IOERR;
      }
      if ((theifile = fopen (infname, "rb")) == NULL) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_NOT_OPEN_FILE),
           infname, strerror (uu_errno=errno));
    return UURET_IOERR;
      }
      if (linperfile <= 0)
    numparts = 1;
      else
    numparts = (int) (((long)finfo.st_size+(linperfile*bpl[encoding]-1))/
              (linperfile*bpl[encoding]));

      themode  = (filemode) ? filemode : ((int) finfo.st_mode & 0777);
      thesize  = (long) finfo.st_size;
    }
    else {
      if (fstat (fileno (infile), &finfo) != 0) {
    if (filesize <= 0) {
      UUMessage (uuencode_id, __LINE__, UUMSG_WARNING,
             uustring (S_STAT_ONE_PART));
      numparts = 1;
      themode  = (filemode)?filemode:0644;
      thesize  = -1;
    }
    else {
      if (linperfile <= 0)
        numparts = 1;
      else
        numparts = (int) ((filesize+(linperfile*bpl[encoding]-1))/
                  (linperfile*bpl[encoding]));

      themode  = (filemode)?filemode:0644;
      thesize  = filesize;
    }
      }
      else {
    if (linperfile <= 0)
      numparts = 1;
    else
      numparts = (int) (((long)finfo.st_size+(linperfile*bpl[encoding]-1))/
                (linperfile*bpl[encoding]));

    filemode = (int) finfo.st_mode & 0777;
    thesize  = (long) finfo.st_size;
      }
      theifile = infile;
    }

    /*
     * if there's one part only, don't use Message/Partial
     */

    if (numparts == 1) {
      if (infile==NULL) fclose (theifile);
      return UUE_PrepSingleExt (outfile, infile, infname, encoding,
                outfname, filemode, destination,
                from, subject, replyto, isemail);
    }

    /*
     * we also need a unique ID
     */

    sprintf (mimeid, "UUDV-%ld.%ld.%s",
         (long) time(NULL), thesize,
         (strlen(oname)>16)?"oops":oname);
  }

  if ((subline = (char *) malloc (len)) == NULL) {
    UUMessage (uuencode_id, __LINE__, UUMSG_ERROR,
           uustring (S_OUT_OF_MEMORY), len);
    if (infile==NULL) fclose (theifile);
    return UURET_NOMEM;
  }


  if (encoding == YENC_ENCODED) {
    if (partno == 1) crc = 0;
    crcptr = &crc;
    if (subject)
      sprintf (subline, "- %s - %s (%03d/%03d)", oname, subject,
           partno, numparts);
    else
      sprintf (subline, "- %s - (%03d/%03d)", oname,
           partno, numparts);
  }
  else {
    if (subject)
      sprintf (subline, "%s (%03d/%03d) - [ %s ]",
           subject, partno, numparts, oname);
    else
      sprintf (subline, "[ %s ] (%03d/%03d)",
           oname, partno, numparts);
  }

  if (from) {
    fprintf (outfile, "From: %s%s", from, (char *) eolstring);
  }

  if (destination) {
    fprintf (outfile, "%s: %s%s",
         (isemail)?"To":"Newsgroups",
         destination, (char *) eolstring);
  }

  fprintf (outfile, "Subject: %s%s", subline, (char *) eolstring);

  if (replyto) {
    fprintf (outfile, "Reply-To: %s%s", replyto, (char *) eolstring);
  }

  if (encoding != YENC_ENCODED) {
    fprintf (outfile, "MIME-Version: 1.0%s", (char *) eolstring);
    fprintf (outfile, "Content-Type: Message/Partial; number=%d; total=%d;%s",
         partno, numparts, (char *) eolstring);
    fprintf (outfile, "\tid=\"%s\"%s",
         mimeid, (char *) eolstring);
  }

  fprintf (outfile, "%s", (char *) eolstring);

  res = UUEncodePartial (outfile, theifile,
             infname, encoding,
             (outfname)?outfname:infname, NULL,
             themode, partno, linperfile, crcptr);

  _FP_free (subline);

  if (infile==NULL) {
    if (res != UURET_OK) {
      fclose (theifile);
      return res;
    }
    if (feof (theifile)) {
      fclose (theifile);
      return UURET_OK;
    }
    return UURET_CONT;
  }

  return res;
}