| /* 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_max += 32; |
| _sf_stk = realloc(_sf_stk, sizeof(scanflags_t) * _sf_max); |
| } |
| |
| // 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_max = 32; |
| _sf_stk = malloc(sizeof(scanflags_t) * _sf_max); |
| if (!_sf_stk) |
| lerr_fatal(_("Unable to allocate %zu of stack"), sizeof(scanflags_t)); |
| _sf_stk[_sf_top_ix] = 0; |
| } |
| |
| /* vim:set expandtab cindent tabstop=4 softtabstop=4 shiftwidth=4 textwidth=0: */ |