1 files changed, 71 insertions, 0 deletions
diff --git a/noao/digiphot/ptools/ptutils/t_istable.x b/noao/digiphot/ptools/ptutils/t_istable.x
new file mode 100644
index 00000000..b8cbf5db
--- /dev/null
+++ b/noao/digiphot/ptools/ptutils/t_istable.x
@@ -0,0 +1,71 @@
+include "../../lib/ptkeysdef.h"
+
+# T_ISTABLE -- Decide whether an input file is an ST Table, an APPHOT style
+# text file or neither.
+
+procedure t_istable ()
+
+pointer	infile			# name of the input file
+
+bool	table, text, other
+int	fd, type
+pointer	sp, line
+int	access(), tbtopn(), open(), getline(), strmatch()
+errchk	tbtopn(), open()
+
+begin
+	# Get some working space.
+	call smark (sp)
+	call salloc (infile, SZ_FNAME, TY_CHAR)
+	call salloc (line, SZ_LINE, TY_CHAR)
+
+	# Fetch the name of the input file
+	call clgstr ("infile", Memc[infile], SZ_FNAME)
+	if (access (Memc[infile], READ_ONLY, TEXT_FILE) == YES)
+	    type = TEXT_FILE
+	else
+	    type = BINARY_FILE
+
+	if (type == BINARY_FILE) {
+	    iferr {
+	        fd = tbtopn (Memc[infile], READ_ONLY, 0)
+	    } then {
+		table = false
+		text = false
+		other = true
+	    } else {
+		table = true
+		text = false
+		other = false
+		call tbtclo (fd)
+	    }
+	} else {
+	    table = false
+	    iferr {
+	        fd = open (Memc[infile], READ_ONLY, TEXT_FILE) 
+	    } then {
+	        text = false
+	        other = true
+	    } else {
+	        Memc[line] = EOS
+	        if (getline (fd, Memc[line]) != EOF) {
+		    if (strmatch (Memc[line], KY_CHAR_IRAF) != 0) {
+		        text = true
+		        other = false
+		    } else {
+		        text = false
+		        other = true
+		    }
+		}
+		call close (fd)
+	    }
+	}
+
+	# Store the results in the istable parameter file.
+	call clputb ("table", table)
+	call clputb ("text", text)
+	call clputb ("other", other)
+
+	# Free memory.
+	call sfree (sp)
+end