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/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#define import_spp
#define import_libc
#define import_xnames
#define import_stdio
#define import_ctype
#define import_stdarg
#include <iraf.h>
/* PRINTF -- Emulation of the UNIX printf facilities with the IRAF FMTIO
** interface as the backend. All features of the UNIX printf are supported
** without modification. Additional format codes are supported in conformance
** with the IRAF printf, e.g., hms format, variable radix, tabstops, etc.,
** but these are upward compatible with standard UNIX usage.
*/
#define SZ_FMTSPEC 25 /* max size single format spec */
#define SZ_OBUF SZ_COMMAND /* sz intermediate buffer */
#define MAX_PREC 4 /* max "*" deferred args */
#define NOARG (-1) /* % spec with no data value */
/* PRINTF -- Formatted print to the standard output.
*/
void
printf (char *format, ...)
{
va_list argp;
void u_doprnt();
va_start (argp, format);
u_doprnt (format, &argp, stdout);
va_end (argp);
}
/* FPRINTF -- Formatted print to a file.
*/
void
fprintf (FILE *fp, char *format, ...)
{
va_list argp;
void u_doprnt();
va_start (argp, format);
u_doprnt (format, &argp, fp);
va_end (argp);
}
/* U_DOPRNT -- Process the format to the output file, taking arguments from
** the list pointed to by argp as % format specs are encountered in the input.
** The main point of this routine is to handle the variable number of arguments.
** The actual encoding is all handled by the IRAF FPRINF and PARG calls.
** N.B. we assume chars are stacked as ints, and floats are stacked as doubles.
*/
void
u_doprnt (
char *format, /* "%w.dC" etc. format spec */
va_list *argp, /* pointer to first value arg */
FILE *fp /* output file */
)
{
register int ch; /* next format char reference */
XCHAR formspec[SZ_FMTSPEC]; /* copy of single format spec */
XCHAR *fsp; /* pointer into formspec */
int done, dotseen; /* one when at end of a format */
int varprec; /* runtime precision is used */
int prec[MAX_PREC]; /* values of prec args */
void u_doarg ();
while ( (ch = *format++) ) {
if (ch == '%') {
fsp = formspec;
*fsp++ = ch;
varprec = 0;
dotseen = 0;
done = 0;
while (!done) {
ch = *fsp++ = *format++;
switch (ch) {
case EOS:
--format;
done++;
break;
case 'l':
/* arg size modifier; ignored for now */
fsp--;
break;
case '*':
prec[varprec++] = va_arg ((*argp), int);
break;
case '.':
dotseen++;
break;
case 'r': /* nonstandard UNIX */
if ((ch = *fsp++ = *format++) == '*') {
int radix;
int radchar;
radix = va_arg ((*argp), int);
if (radix < 0)
radchar = 'A';
else if (radix > 9)
radchar = radix - 10 + 'A';
else
radchar = todigit (radix);
*(fsp-1) = radchar;
} else if (ch == EOS) {
--format;
break;
}
/* fall through */
case 'b': /* nonstandard UNIX */
case 'c':
case 'd':
case 'o':
case 'x':
case 'u':
*fsp = EOS;
u_doarg (fp, formspec, &argp, prec, varprec, TY_INT);
done++;
break;
case 'E': /* ANSI emulation */
*(fsp-1) = 'e';
goto rval;
case 'G': /* ANSI emulation */
*(fsp-1) = 'g';
goto rval;
case 'z': /* nonstandard UNIX */
case 'h': /* nonstandard UNIX */
case 'H': /* nonstandard UNIX */
case 'm': /* nonstandard UNIX */
case 'M': /* nonstandard UNIX */
case 'e':
case 'f':
case 'g':
/* If no precision was specified, default to 14 digits
* for %[efgz] and 3 digits for %[hm].
*/
rval: if (!dotseen) {
*(fsp-1) = '.';
if (ch == 'h' || ch == 'm' ||
ch == 'H' || ch == 'M') {
*fsp++ = '3';
} else {
*fsp++ = '1';
*fsp++ = '4';
}
*fsp++ = ch;
}
*fsp = XEOS;
u_doarg (fp, formspec, &argp, prec, varprec, TY_DOUBLE);
done++;
break;
case 's':
*fsp = EOS;
u_doarg (fp, formspec, &argp, prec, varprec, TY_CHAR);
done++;
break;
case 't': /* nonstandard UNIX */
case 'w': /* nonstandard UNIX */
*fsp = EOS;
u_doarg (fp, formspec, &argp, prec, varprec, NOARG);
done++;
break;
case '%':
putc (ch, fp);
done++;
break;
}
}
} else
putc (ch, fp);
}
}
/* U_DOARG -- Encode a single argument acording to the simplified format
** specification given by formspec. This is the interface to the IRAF
** formatted output procedures.
*/
void
u_doarg (fp, formspec, argp, prec, varprec, dtype)
FILE *fp; /* output file */
XCHAR *formspec; /* format string */
va_list **argp; /* pointer to data value */
int prec[]; /* varprec args, if any */
int varprec; /* number of varprec args */
int dtype; /* datatype of data value */
{
register int p;
XCHAR sbuf[SZ_OBUF+1];
XINT fd = fileno (fp);
XINT ival;
XDOUBLE dval;
char *cptr;
/* Pass format string and any variable precision arguments.
*/
FPRINTF (&fd, formspec);
for (p=0; p < varprec; p++) {
ival = prec[p];
PARGI (&ival);
}
/* Pass the data value to be encoded, bump argument pointer by the
* size of the data object. If there is no data value the case
* is a no-op.
*/
switch (dtype) {
case TY_INT:
ival = va_arg ((**argp), int);
PARGI (&ival);
break;
case TY_DOUBLE:
dval = va_arg ((**argp), double);
PARGD (&dval);
break;
case TY_CHAR:
cptr = va_arg ((**argp), char *);
PARGSTR (c_strupk (cptr, sbuf, SZ_OBUF));
break;
}
}
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