Markus F.X.J. Oberhumer
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/* getcto.h -- calltrick util
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This file is part of the UPX executable compressor.
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Copyright (C) 1996-2012 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2012 Laszlo Molnar
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All Rights Reserved.
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UPX and the UCL library are free software; you can redistribute them
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and/or modify them under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Markus F.X.J. Oberhumer Laszlo Molnar
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<markus@oberhumer.com> <ml1050@users.sourceforge.net>
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*/
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/*************************************************************************
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//
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**************************************************************************/
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static int getcto(Filter *f, const unsigned char *buf, const int n=256)
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{
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int ic = n;
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if (f->preferred_ctos)
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{
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for (const int *pc = f->preferred_ctos; *pc >= 0; pc++)
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{
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if (*pc < n && buf[*pc] == 0)
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{
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ic = *pc;
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break;
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}
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}
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}
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#if 0
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// just a test to see if certain ctos would improve compression
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if (ic >= n)
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for (ic = 0; ic < n; ic += 16)
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if (buf[ic] == 0)
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break;
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#endif
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if (ic >= n)
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for (ic = 0; ic < n; ic++)
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if (buf[ic] == 0)
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break;
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if (ic >= n)
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//throwCantPack("call trick problem");
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return -1;
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f->cto = (unsigned char) ic;
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return ic;
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}
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/*
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vi:ts=4:et:nowrap
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*/
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