1991-02-19 08:39:46 -04:00
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/***********************************************************
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Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The
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Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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1990-10-14 09:07:46 -03:00
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/* String object interface */
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/*
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123456789-123456789-123456789-123456789-123456789-123456789-123456789-12
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Type stringobject represents a character string. An extra zero byte is
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reserved at the end to ensure it is zero-terminated, but a size is
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present so strings with null bytes in them can be represented. This
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is an immutable object type.
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There are functions to create new string objects, to test
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an object for string-ness, and to get the
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string value. The latter function returns a null pointer
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if the object is not of the proper type.
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There is a variant that takes an explicit size as well as a
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variant that assumes a zero-terminated string. Note that none of the
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functions should be applied to nil objects.
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*/
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/* NB The type is revealed here only because it is used in dictobject.c */
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typedef struct {
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OB_VARHEAD
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char ob_sval[1];
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} stringobject;
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extern typeobject Stringtype;
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#define is_stringobject(op) ((op)->ob_type == &Stringtype)
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extern object *newsizedstringobject PROTO((char *, int));
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extern object *newstringobject PROTO((char *));
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extern unsigned int getstringsize PROTO((object *));
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extern char *getstringvalue PROTO((object *));
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extern void joinstring PROTO((object **, object *));
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extern int resizestring PROTO((object **, int));
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/* Macro, trading safety for speed */
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#define GETSTRINGVALUE(op) ((op)->ob_sval)
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