uuencode.c

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/*
 * 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 [email protected]
 *
 * 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
#ifdef _MSC_VER
#include "config.h.win32"
#else
#include "config.h"
#endif
#endif

#ifdef SYSTEM_WINDLL
#include 
#endif
#ifdef SYSTEM_OS2
#include 
#endif

#include 
#include 
#include 
#include 
#include 

#ifdef STDC_HEADERS
#include 
#include 
#endif
#ifdef HAVE_UNISTD_H
#include 
#endif
#ifdef HAVE_ERRNO_H
#include 
#endif

#include uudeview.h>
#include uuint.h>
#include fptools.h>
#include uustring.h>
#include crc32.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: uuencode.c 260 2007-05-04 23:32:54Z csk $";

#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, crc32_t *crc, crc32_t *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 00274       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') {
          const size_t n = strlen ((char*) eolstring);
          itemp[--count] = '\0';
          if (fwrite (itemp, 1, count, outfile) != count ||
              fwrite ((char *) eolstring, 1, n, outfile) != n) {
            return UURET_IOERR;
          }
        }
        else {
          if (fwrite (itemp, 1, count, outfile) != llen) {
            return UURET_IOERR;
          }
        }
      }
      else if (encoding == QP_ENCODED) {
        for (index=0; index00314           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] 00325                    (itemp[index] >= 62 && itemp[index] 00326                    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 00340                 *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] 00388                   (itemp[index+1] >= 62 && itemp[index+1] 00389                 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 00421       if ((count = fread (itemp, 1, 128, infile)) != 128) {
        if (count == 0) {
          break;
        }
        else if (ferror (infile)) {
          return UURET_IOERR;
        }
      }

      if (pcrc)
        *pcrc = crc32(*pcrc, itemp, count);
      if (crc)
        *crc = crc32(*crc, itemp, count);

      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; index00448         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 00522     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; index00556       *optr++ = table[itemp[index] >> 2];
      *optr++ = table[((itemp[index  ] & 0x03) > 4)];
      *optr++ = table[((itemp[index+1] & 0x0f) > 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) 00571                           ((itemp[index+1] & 0xf0) >> 4)];
          *optr++ = table[((itemp[index+1] & 0x0f) 00573           *optr++ = '=';
        }
        else if (count - index == 1) {
          *optr++ = table[ itemp[index] >> 2];
          *optr++ = table[(itemp[index] & 0x03) 00578           *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) 00587                           ( itemp[index+1] >> 4)];
          *optr++ = table[((itemp[index+1] & 0x0f) 00589           *optr++ = table[0];
        }
        else if (count - index == 1) {
          *optr++ = table[ itemp[index] >> 2];
          *optr++ = table[(itemp[index] & 0x03) 00594           *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;
  crc32_t crc;
  crc32_t *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 00678     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",
             eolstring);
    fprintf (outfile, "Content-Transfer-Encoding: %s%s",
             CTE_TYPE(encoding), eolstring);
    fprintf (outfile, "Content-Disposition: attachment; filename=\"%s\"%s",
             UUFNameFilter ((outfname)?outfname:infname), eolstring);
    fprintf (outfile, "%s", eolstring);
  }

  if (encoding == UU_ENCODED || encoding == XX_ENCODED) {
    fprintf (outfile, "begin %o %s%s",
             (themode) ? themode : 0644,
             UUFNameFilter ((outfname)?outfname:infname), 
             eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    crc = crc32(0L, Z_NULL, 0);
    crcptr = &crc;
    if (progress.fsize == -1) {
      fprintf (outfile, "=ybegin line=128 name=%s%s",
               UUFNameFilter ((outfname)?outfname:infname), 
               eolstring);
    }
    else {
      fprintf (outfile, "=ybegin line=128 size=%ld name=%s%s",
               progress.fsize,
               UUFNameFilter ((outfname)?outfname:infname), 
               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], 
             eolstring);
    fprintf (outfile, "end%s", eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    if (progress.fsize == -1) {
      fprintf (outfile, "=yend crc32=%08lx%s",
               crc,
               eolstring);
    }
    else {
      fprintf (outfile, "=yend size=%ld crc32=%08lx%s",
               progress.fsize,
               crc,
               eolstring);
    }
  }

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

  fprintf (outfile, "%s", 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,
                 crc32_t *crcptr)
{
  mimemap *miter=mimetable;
  static FILE *theifile;
  int themode, numparts=1;
  struct stat finfo;
  long thesize;
  char *ptr;
  int res;
  crc32_t pcrc;
  crc32_t *pcrcptr=NULL;

  if ((outfname==NULL&&infname==NULL) || partno00809       (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 00838         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 00856           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", eolstring);
      fprintf (outfile, "Content-Type: %s%s",
               (mimetype)?mimetype:"Application/Octet-Stream",
               eolstring);
      fprintf (outfile, "Content-Transfer-Encoding: %s%s",
               CTE_TYPE(encoding), eolstring);
      fprintf (outfile, "Content-Disposition: attachment; filename=\"%s\"%s",
               UUFNameFilter ((outfname)?outfname:infname), eolstring);
    }

    fprintf (outfile, "%s", 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), eolstring);
    }
  }
  if (encoding == YENC_ENCODED) {
    pcrc = crc32(0L, Z_NULL, 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), 
                 eolstring);
      }
      else {
        fprintf (outfile, "=ybegin part=%d line=128 size=%ld name=%s%s",
                 partno,
                 progress.totsize,
                 UUFNameFilter ((outfname)?outfname:infname), 
                 eolstring);
      }

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

  /*
 * update progress information
 */

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

  if (progress.totsize 00968     progress.fsize = -1;
  else if (linperfile 00970     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], 
             eolstring);
    fprintf (outfile, "end%s", 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", eolstring);
  }

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

  if (encoding != PT_ENCODED && encoding != QP_ENCODED) {
    fprintf (outfile, "%s", 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;
  crc32_t crc;
  crc32_t *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 01106     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), 
             eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    crc = crc32(0L, Z_NULL, 0);
    crcptr = &crc;
    if (progress.fsize == -1) {
      fprintf (outfile, "=ybegin line=128 name=%s%s",
               UUFNameFilter ((outfname)?outfname:infname), 
               eolstring);
    }
    else {
      fprintf (outfile, "=ybegin line=128 size=%ld name=%s%s",
               progress.fsize,
               UUFNameFilter ((outfname)?outfname:infname), 
               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], 
             eolstring);
    fprintf (outfile, "end%s", eolstring);
  }
  else if (encoding == YENC_ENCODED) {
    if (progress.fsize == -1) {
      fprintf (outfile, "=yend crc32=%08lx%s",
               crc,
               eolstring);
    }
    else {
      fprintf (outfile, "=yend size=%ld crc32=%08lx%s",
               progress.fsize,
               crc,
               eolstring);
    }
  }

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

  fprintf (outfile, "%s", 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;
  crc32_t pcrc, crc;
  crc32_t *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 = 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 = 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 = 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 01281       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 01298         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.totsizeprogress.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 01350       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", eolstring);
      fprintf (outfile, "_=_ %s", eolstring);
      if (numparts == -1)
        fprintf (outfile, "_=_ Part %03d of file %s%s",
                 part, UUFNameFilter ((outfname)?outfname:infname),
                 eolstring);
      else
        fprintf (outfile, "_=_ Part %03d of %03d of file %s%s",
                 part, numparts,
                 UUFNameFilter ((outfname)?outfname:infname),
                 eolstring);
      fprintf (outfile, "_=_ %s", eolstring);
      fprintf (outfile, "%s", eolstring);
    }

    if (part==1 && (encoding == UU_ENCODED || encoding == XX_ENCODED)) {
      fprintf (outfile, "begin %o %s%s",
               (filemode)?filemode : 0644,
               UUFNameFilter ((outfname)?outfname:infname), 
               eolstring);
    }
    else if (encoding == YENC_ENCODED) {
      if (!crcptr) {
        crc = crc32(0L, Z_NULL, 0);
        crcptr = &crc;
      }
      pcrc = crc32(0L, Z_NULL, 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), 
                   eolstring);
        }
        else {
          fprintf (outfile, "=ybegin part=%d line=128 size=%ld name=%s%s",
                   part,
                   progress.totsize,
                   UUFNameFilter ((outfname)?outfname:infname), 
                   eolstring);
        }

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

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

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

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

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

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

  fprintf (outfile, "%s", 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 crc32_t crc;
  crc32_t *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 01663         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 01674           UUMessage (uuencode_id, __LINE__, UUMSG_WARNING,
                     uustring (S_STAT_ONE_PART));
          numparts = 1;
          themode  = (filemode)?filemode:0644;
          thesize  = -1;
        }
        else {
          if (linperfile 01682             numparts = 1;
          else
            numparts = (int) ((filesize+(linperfile*bpl[encoding]-1))/
                              (linperfile*bpl[encoding]));

          themode  = (filemode)?filemode:0644;
          thesize  = filesize;
        }
      }
      else {
        if (linperfile 01693           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 = crc32(0L, Z_NULL, 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, eolstring);
  }

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

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

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

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

---