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1 /* m_remsg.c - realloc a msgs structure */
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2 #ifndef lint
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3 static char ident[] = "@(#)$Id$";
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4 #endif /* lint */
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5
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6 #include "../h/mh.h"
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7 #include <stdio.h>
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8
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9
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10 struct msgs *m_remsg (mp, lo, hi)
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11 register struct msgs *mp;
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12 int lo,
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13 hi;
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14 {
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15 int msgnum;
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16 #ifdef MTR
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17 register int *sp,
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18 *pp;
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19 #endif /* MTR */
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20
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21 if (lo == 0 && (lo = mp -> lowmsg) == 0)
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22 lo = 1;
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23 if (hi < mp -> hghmsg)
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24 hi = mp -> hghmsg + (MAXFOLDER - mp -> nummsg);
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25 if (hi <= mp -> hghmsg)
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26 hi = mp -> hghmsg + MAXFOLDER;
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27 if (lo == mp -> lowmsg && hi == mp -> hghmsg)
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28 return mp;
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29
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30 #ifndef MTR
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31 mp = (struct msgs *) realloc ((char *) mp, MHSIZE (mp, lo, hi));
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32 if (mp == NULL)
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33 adios (NULLCP, "unable to re-allocate folder storage");
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34 #else /* MTR */
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35 if ((sp = (int *) calloc ((unsigned) 1, MHSIZEX (mp, lo, hi))) == NULL)
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36 adios (NULLCP, "unable to re-allocate messages storage");
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37
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38 pp = sp - lo;
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39 if (pp < (int *)0)
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40 adios (NULLCP, "m_remsg() botch -- you lose big[1]");
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41 for (msgnum = mp -> lowmsg; msgnum <= mp -> hghmsg; msgnum++)
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42 pp[msgnum] = mp -> msgstats[msgnum];
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43 free ((char *) mp -> msgbase);
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44 mp -> msgstats = sp;
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45 #endif /* MTR */
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46 mp -> lowoff = lo;
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47 mp -> hghoff = hi;
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48 #ifdef MTR
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49 mp -> msgstats = (mp -> msgbase = mp -> msgstats) - mp -> lowoff;
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50 if (mp -> msgstats < (int *)0)
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51 adios (NULLCP, "m_remsg() botch -- you lose big[2]");
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52 #endif /* MTR */
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53 for (msgnum = mp -> lowmsg - 1; msgnum >= lo; msgnum--)
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54 mp -> msgstats[msgnum] = 0;
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55 for (msgnum = mp -> hghmsg + 1; msgnum <= hi; msgnum++)
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56 mp -> msgstats[msgnum] = 0;
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57
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58 return mp;
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59 }
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