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+/***********************************************************
+Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
+Netherlands.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the names of Stichting Mathematisch
+Centrum or CWI not be used in advertising or publicity pertaining to
+distribution of the software without specific, written prior permission.
+
+STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
+THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
+FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
+FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
+OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+******************************************************************/
+
+/* String object interface */
+
+/*
+123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
+
+Type stringobject represents a character string. An extra zero byte is
+reserved at the end to ensure it is zero-terminated, but a size is
+present so strings with null bytes in them can be represented. This
+is an immutable object type.
+
+There are functions to create new string objects, to test
+an object for string-ness, and to get the
+string value. The latter function returns a null pointer
+if the object is not of the proper type.
+There is a variant that takes an explicit size as well as a
+variant that assumes a zero-terminated string. Note that none of the
+functions should be applied to nil objects.
+*/
+
+/* NB The type is revealed here only because it is used in dictobject.c */
+
+typedef struct {
+ OB_VARHEAD
+ char ob_sval[1];
+} stringobject;
+
+extern typeobject Stringtype;
+
+#define is_stringobject(op) ((op)->ob_type == &Stringtype)
+
+extern object *newsizedstringobject PROTO((char *, int));
+extern object *newstringobject PROTO((char *));
+extern unsigned int getstringsize PROTO((object *));
+extern char *getstringvalue PROTO((object *));
+extern void joinstring PROTO((object **, object *));
+extern int resizestring PROTO((object **, int));
+
+/* Macro, trading safety for speed */
+#define GETSTRINGVALUE(op) ((op)->ob_sval)