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/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#include <string.h>
#define import_spp
#define import_libc
#define import_stdio
#include <iraf.h>
#include "config.h"
#include "mem.h"
#include "operand.h"
#include "param.h"
#include "task.h"
#include "errs.h"
#include "proto.h"
/*
* LISTS -- Access lists for list-structured parameters.
*/
extern char *eofstr;
extern char *nullstr;
extern int cldebug;
/* READLIST -- Read next value from list-structured parameter *pp and return
* an operand. Operand will be UNDEF if there was no file or cannot open the
* named file (this will generate a query for the param) or eofstr if eof.
* As a special case, check for the value of the param being the string "stdin"
* and read from the current standard input if it is.
* Call error() if get ferror while reading or can't open list file.
*/
struct operand
readlist (struct param *pp)
{
struct operand result;
int bastype;
char *line;
result.o_type = OT_INT; /* in case we make an undef op */
line = pp->p_listval;
if ((pp->p_valo.o_type & OT_UNDEF) || *pp->p_val.v_s == '\0') {
/* no list file name. */
pp->p_flags &= ~P_LEOF;
setopundef (&result);
return (result);
}
if (pp->p_listfp == NULL && !(pp->p_flags & P_LEOF)) {
char *filename = pp->p_val.v_s;
if (!strcmp (filename, "STDIN") || !strcmp (filename, "stdin"))
pp->p_listfp = currentask->t_stdin;
else if ((pp->p_listfp = fopen (filename, "r")) == NULL) {
/* should we tell user what's happening?
cl_error (E_UERR|E_P, "can not open list file `%s'",
pp->p_val.v_s);
*/
setopundef (&result);
return (result);
}
}
bastype = pp->p_type & OT_BASIC;
if (pp->p_listfp != NULL) {
again: fgets (line, SZ_LINE, pp->p_listfp);
if (ferror (pp->p_listfp)) {
closelist (pp);
/* Don't just let it go as undefined if get an actual error. */
cl_error (E_UERR|E_P, "list file read err");
} else if (feof (pp->p_listfp)) {
closelist (pp);
pp->p_flags |= P_LEOF;
result = makeop (eofstr, OT_STRING);
} else {
char *nlp, *ip;
nlp = strchr (line, '\n');
if (nlp != NULL)
*nlp = '\0';
/* If not simple list structured struct type parameter (used
* to get raw lines from a text file), ignore blank lines and
* comments lines in the list.
*/
if (bastype != OT_STRING ||
pp->p_type & (PT_FILNAM|PT_GCUR|PT_IMCUR|PT_UKEY)) {
for (ip=line; *ip && (*ip == ' ' || *ip == '\t'); ip++)
;
if (*ip == EOS || *ip == '#')
goto again;
}
result = makeop (line, bastype);
}
} else
result = makeop (eofstr, OT_STRING);
return (result);
}
/* CLOSELIST -- Close the list file in list-structured param pp.
* We assume (pp->p_type & PT_LIST) but do check that the file is not
* already closed and that we're not closing the real stdin.
*/
void
closelist (register struct param *pp)
{
if (pp->p_listfp != NULL) {
if (pp->p_listfp != stdin)
fclose (pp->p_listfp);
pp->p_listfp = NULL;
}
}
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