75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/* atob8.c: The opieatob8() library function.
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%%% portions-copyright-cmetz-96
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Portions of this software are Copyright 1996-1998 by Craig Metz, All Rights
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Reserved. The Inner Net License Version 2 applies to these portions of
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the software.
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You should have received a copy of the license with this software. If
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you didn't get a copy, you may request one from <license@inner.net>.
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Portions of this software are Copyright 1995 by Randall Atkinson and Dan
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McDonald, All Rights Reserved. All Rights under this copyright are assigned
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to the U.S. Naval Research Laboratory (NRL). The NRL Copyright Notice and
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License Agreement applies to this software.
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History:
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Modified by cmetz for OPIE 2.3. Return the output variable.
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Don't check parameters.
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Modified by cmetz for OPIE 2.2. Use FUNCTION declaration et al.
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Inlined and obseleted opieskipspace(). Inlined and obseleted
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opiehtoi().
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Created at NRL for OPIE 2.2 from opiesubr2.c
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*/
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#include "opie_cfg.h"
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#include <stdio.h>
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#include "opie.h"
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/* Convert 8-byte hex-ascii string to binary array
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*/
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char *opieatob8 FUNCTION((out, in), char *out AND char *in)
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{
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register int i;
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register int val;
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for (i = 0; i < 8; i++) {
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while (*in == ' ' || *in == '\t')
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in++;
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if (!*in)
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return NULL;
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if ((*in >= '0') && (*in <= '9'))
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val = *(in++) - '0';
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else
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if ((*in >= 'a') && (*in <= 'f'))
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val = *(in++) - 'a' + 10;
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else
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if ((*in >= 'A') && (*in <= 'F'))
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val = *(in++) - 'A' + 10;
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else
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return NULL;
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*out = val << 4;
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while (*in == ' ' || *in == '\t')
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in++;
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if (!*in)
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return NULL;
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if ((*in >= '0') && (*in <= '9'))
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val = *(in++) - '0';
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else
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if ((*in >= 'a') && (*in <= 'f'))
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val = *(in++) - 'a' + 10;
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else
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if ((*in >= 'A') && (*in <= 'F'))
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val = *(in++) - 'A' + 10;
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else
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return NULL;
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*out++ |= val;
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}
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return out;
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}
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