Initial commit

1 files changed, 41 insertions, 0 deletions

diff --git a/sys/libc/cstrupk.c b/sys/libc/cstrupk.c
new file mode 100644
index 00000000..c8e26e19
--- /dev/null
+++ b/sys/libc/cstrupk.c
@@ -0,0 +1,41 @@
+/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
+*/
+
+#define	import_libc
+#define	import_spp
+#include <iraf.h>
+
+/* C_STRUPK -- Unpack a C string into an SPP string.  This procedure should
+** be called from C in preference to the SPP procedure STRUPK because the
+** input string is declared to be of type char, rather than as an XCHAR
+** array containing packed chars as in STRUPK.  The output string is however
+** of type XCHAR since it is expected to be passed to an SPP procedure.  A
+** pointer to the output string is returned as the function value for use
+** in argument lists.
+*/
+XCHAR *
+c_strupk (
+  char	*str,			/* C string			*/
+  XCHAR	*outstr,		/* SPP string			*/
+  int	maxch			/* max chars out, incl EOS	*/
+)
+{
+	register char	*ip = str;
+	register XCHAR	*op = outstr;
+	register int	  n = maxch-1;
+
+
+	/* Is is necessary to determine the length of the string in order to
+	 * be able to unpack the string in place, i.e., from right to left.
+	 */
+	if (maxch)
+	    if (sizeof(char) != sizeof(XCHAR) || str != (char *)outstr) {
+		n = min (n, strlen(ip));
+		op[n] = XEOS;
+
+		for (n = n - 1;  n >= 0;  --n)
+		    op[n] = ip[n];
+	    }
+
+	return (outstr);
+}