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/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#include <stdio.h>
#include <string.h>
#define import_spp
#include <iraf.h>
/* OS_STRUPK -- Unpack a C string into an SPP string. This procedure should
* be called from C in preference to the SPP procedure STRUPK because the
* input string is declared to be of type char, rather than as an XCHAR
* array containing packed chars as in STRUPK. The output string is however
* of type XCHAR since it is expected to be passed to an SPP procedure. A
* pointer to the output string is returned as the function value for use
* in argument lists.
*/
XCHAR *
os_strupk (
char *str, /* C string */
XCHAR *outstr, /* SPP string */
int maxch /* max chars out, excl EOS */
)
{
register char *ip = str;
register XCHAR *op = outstr;
register int n = maxch;
/* Is is necessary to determine the length of the string in order to
* be able to unpack the string in place, i.e., from right to left.
*/
if (maxch) {
if (sizeof(char) != sizeof(XCHAR) || str != (char *)outstr) {
n = min (n, strlen(ip));
op[n] = XEOS;
while (--n >= 0)
op[n] = ip[n];
}
}
return (outstr);
}
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