4.3BSD - /usr/src/new/mh/sbr/m_remsg.c

   1: /* m_remsg.c - realloc a msgs structure */
   2: 
   3: #include "../h/mh.h"
   4: #include <stdio.h>
   5: 
   6: 
   7: struct msgs *m_remsg (mp, lo, hi)
   8: register struct msgs *mp;
   9: int lo,
  10:     hi;
  11: {
  12:     int     msgnum;
  13: #ifdef  MTR
  14:     register short *sp,
  15:            *pp;
  16: #endif	MTR
  17: 
  18:     if (lo == 0 && (lo = mp -> lowmsg) == 0)
  19:     lo = 1;
  20:     if (hi < mp -> hghmsg)
  21:     hi = mp -> hghmsg + (MAXFOLDER - mp -> nummsg);
  22:     if (hi <= mp -> hghmsg)
  23:     hi = mp -> hghmsg + MAXFOLDER;
  24:     if (lo == mp -> lowmsg && hi == mp -> hghmsg)
  25:     return mp;
  26: 
  27: #ifndef MTR
  28:     mp = (struct msgs  *) realloc ((char *) mp, MSIZE (mp, lo, hi));
  29:     if (mp == NULL)
  30:     adios (NULLCP, "unable to re-allocate folder storage");
  31: #else   MTR
  32:     if ((sp = (short *) calloc ((unsigned) 1, MSIZEX (mp, lo, hi))) == NULL)
  33:     adios (NULLCP, "unable to re-allocate messages storage");
  34: 
  35:     pp = sp - lo;
  36:     if (pp < 0)
  37:     adios (NULLCP, "m_remsg() botch -- you lose big[1]");
  38:     for (msgnum = mp -> lowmsg; msgnum <= mp -> hghmsg; msgnum++)
  39:     pp[msgnum] = mp -> msgstats[msgnum];
  40:     free ((char *) mp -> msgbase);
  41:     mp -> msgstats = sp;
  42: #endif	MTR
  43:     mp -> lowoff = lo;
  44:     mp -> hghoff = hi;
  45: #ifdef  MTR
  46:     mp -> msgstats = (mp -> msgbase = mp -> msgstats) - mp -> lowoff;
  47:     if (mp -> msgstats < 0)
  48:     adios (NULLCP, "m_remsg() botch -- you lose big[2]");
  49: #endif	MTR
  50:     for (msgnum = mp -> lowmsg - 1; msgnum >= lo; msgnum--)
  51:     mp -> msgstats[msgnum] = NULL;
  52:     for (msgnum = mp -> hghmsg + 1; msgnum <= hi; msgnum++)
  53:     mp -> msgstats[msgnum] = NULL;
  54: 
  55:     return mp;
  56: }

Defined functions