Initial import of the CDE 2.1.30 sources from the Open Group.

cde/lib/DtSvc/DtCodelibs/stringio.h

@@ -0,0 +1,75 @@
+/*
+ * File:	stringio.h $XConsortium: stringio.h /main/3 1995/10/26 16:10:00 rswiston $
+ *
+ * (c) Copyright 1993, 1994 Hewlett-Packard Company
+ * (c) Copyright 1993, 1994 International Business Machines Corp.
+ * (c) Copyright 1993, 1994 Sun Microsystems, Inc.
+ * (c) Copyright 1993, 1994 Novell, Inc.
+ */
+#include <codelibs/boolean.h>
+#define __PRIVATE_
+#include <codelibs/privbuf.h>
+
+class _StringIO
+{
+    privbuf_strvec ptr;
+    int curr;
+    int old_curr;
+    char const *old_ccp;
+    int doit(int commit);
+public:
+    void push(char const *ccp);
+    _StringIO();
+    _StringIO(char const *ccp);
+    void unget();
+    int get();
+    int next();
+    boolean in_expansion();
+};
+
+inline
+_StringIO::_StringIO()
+{
+    curr = old_curr = -1;
+    old_ccp = 0;
+}
+
+inline void
+_StringIO::push(char const *ccp)
+{
+    ptr[++curr] = (char*)ccp;
+}
+
+inline
+_StringIO::_StringIO(char const *ccp)
+{
+    curr = old_curr = -1;
+    old_ccp = 0;
+    push(ccp);
+}
+
+inline void
+_StringIO::unget()
+{
+    if (curr >= 0)
+	ptr[curr] = (char*)old_ccp;
+    curr = old_curr;
+}
+
+inline int
+_StringIO::get()
+{
+    return doit(1);
+}
+
+inline int
+_StringIO::next()
+{
+    return doit(0);
+}
+
+inline boolean
+_StringIO::in_expansion()
+{
+    return ((boolean)(curr > 0));
+}