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diff --git a/noao/twodspec/multispec/msnames.x b/noao/twodspec/multispec/msnames.x
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+++ b/noao/twodspec/multispec/msnames.x
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+include	"ms.h"
+
+# The procedures in this file deal with the mapping of the
+# database names to the MULTISPEC identifiers and relations between the
+# identifiers and their meaning.
+#
+# MSNAMES -- Allocate memory and set name array in MULTISPEC data structure.
+# MS_DB_ID -- Associate a database name to the MULTISPEC identifier.
+# IS_PARAM_ID -- Test if an identifier refers to a model parameter.
+# IS_FIT_ID -- Test if an identifier refers to a curfit parameter fit.
+# MS_FIT_ID -- Return fit identifier for specified parameter identifier.
+# MS_MODEL_ID -- CL get a model name and map to a MULTISPEC identifier.
+
+# MSNAMES -- Allocate memory and set the name array in MULTISPEC data structure.
+#
+# The name array maps the integer identifiers with the names in the
+# database.  The name array is also allocated if necessary.
+# This is the only place where the database names are explicitly known.
+
+procedure msnames (ms)
+
+pointer	ms
+
+begin
+	if (MS_NAMES(ms) == NULL)
+	    call calloc (MS_NAMES(ms), MS_DB_ENTRIES * (SZ_MS_KEY + 1), TY_CHAR)
+
+	# Set name array mapping the MULTISPEC IDs to the database names.
+	call sprintf (NAME(ms, HDR), SZ_MS_KEY, "header")
+	call sprintf (NAME(ms, COMMENTS), SZ_MS_KEY, "comments")
+	call sprintf (NAME(ms, SAMPLE), SZ_MS_KEY, "samples")
+	call sprintf (NAME(ms, I0), SZ_MS_KEY, "i0")
+	call sprintf (NAME(ms, X0), SZ_MS_KEY, "x0")
+	call sprintf (NAME(ms, X0_FIT), SZ_MS_KEY, "x0 fit")
+	call sprintf (NAME(ms, S0), SZ_MS_KEY, "s0")
+	call sprintf (NAME(ms, S1), SZ_MS_KEY, "s1")
+	call sprintf (NAME(ms, S2), SZ_MS_KEY, "s2")
+	call sprintf (NAME(ms, S0_FIT), SZ_MS_KEY, "s0 fit")
+	call sprintf (NAME(ms, S1_FIT), SZ_MS_KEY, "s1 fit")
+	call sprintf (NAME(ms, S2_FIT), SZ_MS_KEY, "s2 fit")
+end
+
+
+# MS_DB_ID -- Associate a database name to the MULTISPEC identifier.
+#
+# The input entry name is matched with a database name and the
+# MULTISPEC identifier is returned.
+
+int procedure ms_db_id (ms, entry)
+
+pointer	ms
+char	entry[ARB]
+
+int	i
+
+bool	streq()
+
+begin
+	do i = 1, MS_DB_ENTRIES
+	    if (streq (entry, NAME(ms, i)))
+		return (i)
+
+	return (0)
+end
+
+
+# IS_PARAM_ID -- Test if an identifier refers to a model parameter.
+
+bool procedure is_param_id (param_id)
+
+int	param_id
+
+begin
+	switch (param_id) {
+	case X0, I0, S0, S1, S2:
+	    return (TRUE)
+	default:
+	    return (FALSE)
+	}
+end
+
+
+# IS_FIT_ID -- Test if an identifier refers to a parameter fit.
+
+bool procedure is_fit_id (fit_id)
+
+int	fit_id
+
+begin
+	switch (fit_id) {
+	case X0_FIT, S0_FIT, S1_FIT, S2_FIT:
+	    return (TRUE)
+	default:
+	    return (FALSE)
+	}
+end
+
+
+# MS_FIT_ID -- Return fit identifier for specified parameter identifier.
+
+int procedure ms_fit_id (param_id)
+
+int	param_id
+
+begin
+	switch (param_id) {
+	case X0:
+	    return (X0_FIT)
+	case S0:
+	    return (S0_FIT)
+	case S1:
+	    return (S1_FIT)
+	case S2:
+	    return (S2_FIT)
+	default:
+	    return (ERR)
+	}
+end
+
+# MS_MODEL_ID -- CL get a model name and map to a MULTISPEC identifier.
+#
+# This procedure isolates the model definitions to protect against
+# changes in the model names or the order and choice of identifiers
+# in ms.h.
+
+int procedure ms_model_id (param)
+
+char	param[ARB]		# CL parameter name
+char	str[SZ_LINE]
+int	i, clgwrd()
+
+begin
+	i = clgwrd (param, str, SZ_LINE, ",gauss5,smooth,")
+	switch (i) {
+	case 1:
+	    return (GAUSS5)
+	case 2:
+	    return (SMOOTH)
+	}
+end