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/* This file is part of the Project Athena Zephyr Notification System.
* It contains source for the ZReadAscii function.
*
* Created by: Robert French
*
* $Id$
*
* Copyright (c) 1987, 1990 by the Massachusetts Institute of Technology.
* For copying and distribution information, see the file
* "mit-copyright.h".
*/
#ifndef lint
static const char rcsid_ZReadAscii_c[] = "$Id$";
#endif /* lint */
#include <internal.h>
#include <assert.h>
#define Z_cnvt_xtoi(c) ((temp=(c)-'0'),(temp<10)?temp:((temp-='A'-'9'-1),(temp<16)?temp:-1))
Code_t
ZReadAscii(char *ptr,
int len,
unsigned char *field,
int num)
{
int i;
unsigned int hexbyte;
register int c1, c2;
register unsigned int temp;
for (i=0;i<num;i++) {
if (len >= 1 && *ptr == ' ') {
ptr++;
len--;
}
if (len >= 2 && ptr[0] == '0' && ptr[1] == 'x') {
ptr += 2;
len -= 2;
}
if (len < 2)
return ZERR_BADFIELD;
c1 = Z_cnvt_xtoi(ptr[0]);
if (c1 < 0)
return ZERR_BADFIELD;
c2 = Z_cnvt_xtoi(ptr[1]);
if (c2 < 0)
return ZERR_BADFIELD;
hexbyte = (c1 << 4) | c2;
field[i] = hexbyte;
ptr += 2;
len -= 2;
}
return *ptr ? ZERR_BADFIELD : ZERR_NONE;
}
Code_t
ZReadAscii32(char *ptr,
int len,
unsigned long *value_ptr)
{
unsigned char buf[4];
Code_t retval;
retval = ZReadAscii(ptr, len, buf, 4);
if (retval != ZERR_NONE)
return retval;
*value_ptr = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
return ZERR_NONE;
}
Code_t
ZReadAscii16(char *ptr,
int len,
unsigned short *value_ptr)
{
unsigned char buf[2];
Code_t retval;
retval = ZReadAscii(ptr, len, buf, 2);
if (retval != ZERR_NONE)
return retval;
*value_ptr = (buf[0] << 8) | buf[1];
return ZERR_NONE;
}
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