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/* $OpenBSD: scanflags.c,v 1.3 2015/11/19 23:20:34 tedu Exp $ */
/* scanflags - flags used by scanning. */
/* Copyright (c) 1990 The Regents of the University of California. */
/* All rights reserved. */
/* This code is derived from software contributed to Berkeley by */
/* Vern Paxson. */
/* The United States Government has rights in this work pursuant */
/* to contract no. DE-AC03-76SF00098 between the United States */
/* Department of Energy and the University of California. */
/* This file is part of flex. */
/* Redistribution and use in source and binary forms, with or without */
/* modification, are permitted provided that the following conditions */
/* are met: */
/* 1. Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* 2. Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in the */
/* documentation and/or other materials provided with the distribution. */
/* Neither the name of the University nor the names of its contributors */
/* may be used to endorse or promote products derived from this software */
/* without specific prior written permission. */
/* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */
/* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */
/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */
/* PURPOSE. */
#include "flexdef.h"
scanflags_t* _sf_stk = NULL;
size_t _sf_top_ix=0, _sf_max=0;
void
sf_push (void)
{
if (_sf_top_ix + 1 >= _sf_max)
_sf_stk = (scanflags_t*) realloc ( (void*) _sf_stk, sizeof(scanflags_t) * (_sf_max += 32));
// copy the top element
_sf_stk[_sf_top_ix + 1] = _sf_stk[_sf_top_ix];
++_sf_top_ix;
}
void
sf_pop (void)
{
assert(_sf_top_ix > 0);
--_sf_top_ix;
}
/* one-time initialization. Should be called before any sf_ functions. */
void
sf_init (void)
{
assert(_sf_stk == NULL);
_sf_stk = (scanflags_t*) malloc ( sizeof(scanflags_t) * (_sf_max = 32));
if (!_sf_stk)
lerrsf_fatal(_("Unable to allocate %ld of stack"),
(void *)sizeof(scanflags_t));
_sf_stk[_sf_top_ix] = 0;
}
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