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#pragma prototyped
/*
* 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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