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diff --git a/pkg/tbtables/tbhanp.x b/pkg/tbtables/tbhanp.x
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+include <ctype.h>		# defines IS_WHITE
+include <tbset.h>
+include "tbtables.h"
+
+# tbhanp -- add new parameter
+# This procedure writes a new user parameter to the table; the number
+# of the new parameter is returned.  The data type may be TY_CHAR (for a
+# string), TY_REAL, TY_DOUBLE, TY_INT, or TY_BOOL.
+# The table will be rewritten if necessary in order to increase the amount
+# of space allocated for user parameters.
+#
+# TB_MODIFIED is set by this routine.
+#
+# Phil Hodge,  9-Mar-1989  Change dtype from char to int.
+# Phil Hodge, 14-Feb-1992  Add option for text table type.
+# Phil Hodge, 22-Apr-1994  For text table, append to comment buffer.
+# Phil Hodge,  6-Mar-1995  Erase space in table before writing new parameter.
+# Phil Hodge,  3-Apr-1995  Set TB_MODIFIED to true.
+# Phil Hodge, 24-Jul-1995  Modify for FITS tables.
+# Phil Hodge,  7-Jun-1999  Call tbzkey instead of tbbcmt for text table.
+# Frank Valdes, 20-Nov-2003  Quote strings in text, strip trailing spaces, and
+#                            capitalize keywords to be consistent with tbhpnp.
+
+procedure tbhanp (tp, keyword, dtype, str, parnum)
+
+pointer tp			# i: pointer to table descriptor
+char	keyword[SZ_KEYWORD]	# i: keyword for the parameter
+int	dtype			# i: data type
+char	str[ARB]		# i: string containing the value of the param.
+int	parnum			# o: number of the parameter in the table
+#--
+pointer sp
+pointer text_str		# scratch
+pointer word			# value (extracted from str) of parameter
+pointer comment			# comment string, if any, from str
+int	maxpar			# increased value of TB_MAXPAR
+int	i
+int	ip, nchar, ctowrd(), strlen()
+errchk	tbtchs, tbfanp, tbhpnp, tbhwpr, tbhpcm, tbzkey
+
+begin
+	call smark (sp)
+
+	if (TB_TYPE(tp) == TBL_TYPE_TEXT) {
+
+	    call salloc (text_str, SZ_LINE, TY_CHAR)
+
+	    # Construct "#k keyword = value", and add to keyword list.
+	    call sprintf (Memc[text_str], SZ_LINE, "#k %-8s = ")
+	        call pargstr (keyword)
+	    call strupr (Memc[text_str+3])
+	    if (dtype == TY_CHAR) {
+		call strcat ("'", Memc[text_str], SZ_LINE)
+		call strcat (str, Memc[text_str], SZ_LINE)
+		i = text_str + strlen (Memc[text_str]) - 1
+		for (; IS_WHITE(Memc[i]); i=i-1)
+		    Memc[i] = EOS
+		call strcat ("'", Memc[text_str], SZ_LINE)
+	    } else
+		call strcat (str, Memc[text_str], SZ_LINE)
+	    call tbzkey (tp, Memc[text_str], 0)
+	    parnum = TB_NPAR(tp)
+
+	} else if (TB_TYPE(tp) == TBL_TYPE_FITS) {
+
+	    call tbfanp (tp, keyword, dtype, str, parnum)
+
+	} else {
+
+	    call salloc (text_str, SZ_PARREC, TY_CHAR)
+	    call salloc (word, SZ_PARREC, TY_CHAR)
+	    call salloc (comment, SZ_PARREC, TY_CHAR)
+	    do i = 0, SZ_PARREC-1
+		Memc[text_str+i] = ' '
+	    Memc[text_str+SZ_PARREC] = EOS
+
+	    # Extract value and comment from str.
+	    if (dtype == TY_CHAR) {
+		i = 1
+		while (IS_WHITE(str[i]))
+		    i = i + 1
+		if (str[i] == '"' || str[i] == '\'') {
+		    ip = 1
+		    nchar = ctowrd (str, ip, Memc[word], SZ_PARREC)
+		    i = ip
+		    while (IS_WHITE(str[i]))
+			i = i + 1
+		    call strcpy (str[i], Memc[comment], SZ_PARREC)
+		} else {
+		    call strcpy (str[i], Memc[word], SZ_PARREC)
+		    Memc[comment] = EOS			# no comment
+		}
+	    } else {
+		ip = 1
+		nchar = ctowrd (str, ip, Memc[word], SZ_PARREC)
+		i = ip
+		while (IS_WHITE(str[i]))
+		    i = i + 1
+		call strcpy (str[i], Memc[comment], SZ_PARREC)
+	    }
+
+	    if (TB_NPAR(tp) >= TB_MAXPAR(tp)) {
+		maxpar = TB_MAXPAR(tp) + DEFMAXPAR
+		call tbtchs (tp, maxpar, -1, -1, -1)	# change size
+	    }
+	    parnum = TB_NPAR(tp) + 1
+	    TB_NPAR(tp) = parnum
+
+	    # Blank out the space and then put the Nth parameter.
+	    call tbhwpr (tp, parnum, Memc[text_str])
+	    call tbhpnp (tp, parnum, keyword, dtype, Memc[word])
+	    call tbhpcm (tp, keyword, Memc[comment])	# append comment
+	}
+
+	TB_MODIFIED(tp) = true
+
+	call sfree (sp)
+end