1 /* $NetBSD: scanflags.c,v 1.1.1.2 2013/04/06 14:05:44 christos Exp $ */ 2 3 /* scanflags - flags used by scanning. */ 4 5 /* Copyright (c) 1990 The Regents of the University of California. */ 6 /* All rights reserved. */ 7 8 /* This code is derived from software contributed to Berkeley by */ 9 /* Vern Paxson. */ 10 11 /* The United States Government has rights in this work pursuant */ 12 /* to contract no. DE-AC03-76SF00098 between the United States */ 13 /* Department of Energy and the University of California. */ 14 15 /* This file is part of flex. */ 16 17 /* Redistribution and use in source and binary forms, with or without */ 18 /* modification, are permitted provided that the following conditions */ 19 /* are met: */ 20 21 /* 1. Redistributions of source code must retain the above copyright */ 22 /* notice, this list of conditions and the following disclaimer. */ 23 /* 2. Redistributions in binary form must reproduce the above copyright */ 24 /* notice, this list of conditions and the following disclaimer in the */ 25 /* documentation and/or other materials provided with the distribution. */ 26 27 /* Neither the name of the University nor the names of its contributors */ 28 /* may be used to endorse or promote products derived from this software */ 29 /* without specific prior written permission. */ 30 31 /* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR */ 32 /* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED */ 33 /* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR */ 34 /* PURPOSE. */ 35 36 #include "flexdef.h" 37 38 scanflags_t* _sf_stk = NULL; 39 size_t _sf_top_ix=0, _sf_max=0; 40 41 void 42 sf_push (void) 43 { 44 if (_sf_top_ix + 1 >= _sf_max) 45 _sf_stk = (scanflags_t*) flex_realloc ( (void*) _sf_stk, sizeof(scanflags_t) * (_sf_max += 32)); 46 47 // copy the top element 48 _sf_stk[_sf_top_ix + 1] = _sf_stk[_sf_top_ix]; 49 ++_sf_top_ix; 50 } 51 52 void 53 sf_pop (void) 54 { 55 assert(_sf_top_ix > 0); 56 --_sf_top_ix; 57 } 58 59 /* one-time initialization. Should be called before any sf_ functions. */ 60 void 61 sf_init (void) 62 { 63 assert(_sf_stk == NULL); 64 _sf_stk = (scanflags_t*) flex_alloc ( sizeof(scanflags_t) * (_sf_max = 32)); 65 if (!_sf_stk) 66 lerrsf_fatal(_("Unable to allocate %ld of stack"), 67 (long)sizeof(scanflags_t)); 68 _sf_stk[_sf_top_ix] = 0; 69 } 70 71 /* vim:set expandtab cindent tabstop=4 softtabstop=4 shiftwidth=4 textwidth=0: */ 72