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/* $Id: exrewind.c,v 1.3 2009/06/03 01:10:52 ellson Exp $ $Revision: 1.3 $ */
/* vim:set shiftwidth=4 ts=8: */
/**********************************************************
* This software is part of the graphviz package *
* http://www.graphviz.org/ *
* *
* Copyright (c) 1994-2004 AT&T Corp. *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Corp. *
* *
* Information and Software Systems Research *
* AT&T Research, Florham Park NJ *
**********************************************************/
/*
* Glenn Fowler
* AT&T Research
*
* expression library
*/
#include "exlib.h"
#include <string.h>
int exrewind(Expr_t * ex)
{
register int n;
if (ex->linewrap) {
exerror("too much pushback");
return -1;
}
if (!ex->input->pushback
&& !(ex->input->pushback = oldof(0, char, sizeof(ex->line), 3))) {
exerror("out of space [rewind]");
return -1;
}
if ((n = ex->linep - ex->line))
memcpy(ex->input->pushback, ex->line, n);
if (ex->input->peek) {
ex->input->pushback[n++] = ex->input->peek;
ex->input->peek = 0;
}
ex->input->pushback[n++] = ' ';
ex->input->pushback[n] = 0;
ex->input->pp = ex->input->pushback;
ex->input->nesting = ex->nesting;
setcontext(ex);
return 0;
}
void exstatement(Expr_t * ex)
{
ex->nesting = ex->input->nesting;
setcontext(ex);
}
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