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include <tbset.h>
include "tbtables.h"
# tbhgcm -- get a comment from a header parameter
# This reads the comment from a header parameter. It is an error if
# the keyword is not found, but there need not be an associated comment.
# Trailing blanks are removed from the comment.
#
# Phil Hodge, 6-Mar-1995 Subroutine created.
# Phil Hodge, 8-Jun-1995 Modify for FITS tables.
# Phil Hodge, 7-Jun-1999 Handle text tables.
procedure tbhgcm (tp, keyword, comment, maxch)
pointer tp # i: pointer to table descriptor
char keyword[SZ_KEYWORD] # i: keyword to be found
char comment[ARB] # o: comment string for keyword
int maxch # i: max size of comment
#--
pointer sp
pointer errmsg # scratch for possible error message
pointer str # scratch for string read from header
int parnum # number of the parameter
int index # location of comment within string
int i
int strlen()
bool tbhisc()
begin
if (TB_TYPE(tp) == TBL_TYPE_FITS) {
call tbfgcm (tp, keyword, comment, maxch)
return
}
# We don't read a comment from a comment.
if (tbhisc (keyword)) {
comment[1] = EOS
return
}
call smark (sp)
call salloc (str, SZ_PARREC, TY_CHAR)
# Find the keyword in the header.
call tbhfkw (tp, keyword, parnum)
if (parnum < 1) {
call salloc (errmsg, SZ_FNAME, TY_CHAR)
call sprintf (Memc[errmsg], SZ_FNAME,
"tbhgcm: keyword `%s' not found in table `%s'")
call pargstr (keyword)
call pargstr (TB_NAME(tp))
call error (1, Memc[errmsg])
}
# Read the string containing keyword, datatype, value.
call tbhrpr (tp, parnum, Memc[str])
# Search for a comment.
call tbhfcm (Memc[str], index)
if (index > 0)
call strcpy (Memc[str+index-1], comment, maxch)
else
comment[1] = EOS # no comment
# Trim trailing blanks.
do i = strlen (comment), 1, -1 {
if (comment[i] == ' ')
comment[i] = EOS
else
break
}
call sfree (sp)
end
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