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Annotation of 43BSD/contrib/mh/sbr/m_remsg.c, revision 1.1

1.1     ! root        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: }

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