1 files changed, 42 insertions, 0 deletions
diff --git a/sys/qpoe/qpgstr.x b/sys/qpoe/qpgstr.x
new file mode 100644
index 00000000..91a03a0f
--- /dev/null
+++ b/sys/qpoe/qpgstr.x
@@ -0,0 +1,42 @@
+# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+
+include <syserr.h>
+include "qpoe.h"
+
+# QP_GSTR -- Return the string value of the named parameter.
+
+int procedure qp_gstr (qp, param, outstr, maxch)
+
+pointer qp			#I QPOE descriptor
+char	param[ARB]		#I parameter name
+char	outstr[maxch]		#O receives string value
+int	maxch			#I max chars out
+
+pointer	sym, fm
+int	nchars, fd
+pointer	qp_gpsym()
+int	fm_getfd(), read()
+errchk	qp_bind, qp_gpsym, syserrs, fm_getfd, seek
+
+begin
+	if (QP_ACTIVE(qp) == NO)
+	    call qp_bind (qp)
+	fm = QP_FM(qp)
+
+	# Lookup the symbol in the symbol table.
+	sym = qp_gpsym (qp, param)
+	if (sym == NULL)
+	    call syserrs (SYS_QPUKNPAR, param)
+	else if (!(S_DTYPE(sym) == TY_CHAR || S_DTYPE(sym) == TY_USER))
+	    call syserrs (SYS_QPBADCONV, param)
+
+	# Fetch the string value from the lfile where the data is stored.
+	fd = fm_getfd (fm, S_LFILE(sym), READ_ONLY, 0)
+	call seek (fd, S_OFFSET(sym))
+
+	nchars = max (0, read (fd, outstr, min(S_NELEM(sym),maxch)))
+	outstr[nchars+1] = EOS
+
+	call fm_retfd (fm, S_LFILE(sym))
+	return (nchars)
+end