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  1. /*  $NetBSD: memalloc.h,v 1.11 2000/11/01 19:56:01 christos Exp $   */
  2.  
  3. /*-
  4.  * Copyright (c) 1991, 1993
  5.  *  The Regents of the University of California.  All rights reserved.
  6.  *
  7.  * This code is derived from software contributed to Berkeley by
  8.  * Kenneth Almquist.
  9.  *
  10.  * Redistribution and use in source and binary forms, with or without
  11.  * modification, are permitted provided that the following conditions
  12.  * are met:
  13.  * 1. Redistributions of source code must retain the above copyright
  14.  *    notice, this list of conditions and the following disclaimer.
  15.  * 2. Redistributions in binary form must reproduce the above copyright
  16.  *    notice, this list of conditions and the following disclaimer in the
  17.  *    documentation and/or other materials provided with the distribution.
  18.  * 3. All advertising materials mentioning features or use of this software
  19.  *    must display the following acknowledgement:
  20.  *  This product includes software developed by the University of
  21.  *  California, Berkeley and its contributors.
  22.  * 4. Neither the name of the University nor the names of its contributors
  23.  *    may be used to endorse or promote products derived from this software
  24.  *    without specific prior written permission.
  25.  *
  26.  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36.  * SUCH DAMAGE.
  37.  *
  38.  *  @(#)memalloc.h  8.2 (Berkeley) 5/4/95
  39.  */
  40.  
  41. struct stackmark {
  42.     struct stack_block *stackp;
  43.     char *stacknxt;
  44.     int stacknleft;
  45.     struct stackmark *marknext;
  46. };
  47.  
  48.  
  49. extern char *stacknxt;
  50. extern int stacknleft;
  51. extern int sstrnleft;
  52. extern int herefd;
  53.  
  54. pointer ckmalloc (int);
  55. pointer ckrealloc (pointer, int);
  56. char *savestr (char *);
  57. pointer stalloc (int);
  58. void stunalloc (pointer);
  59. void setstackmark (struct stackmark *);
  60. void popstackmark (struct stackmark *);
  61. void growstackblock (void);
  62. void grabstackblock (int);
  63. char *growstackstr (void);
  64. char *makestrspace (void);
  65. void ungrabstackstr (char *, char *);
  66.  
  67.  
  68.  
  69. #define stackblock() stacknxt
  70. #define stackblocksize() stacknleft
  71. #define STARTSTACKSTR(p)    p = stackblock(), sstrnleft = stackblocksize()
  72. #define STPUTC(c, p)    (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
  73. #define CHECKSTRSPACE(n, p) { if (sstrnleft < n) p = makestrspace(); }
  74. #define USTPUTC(c, p)   (--sstrnleft, *p++ = (c))
  75. #define STACKSTRNUL(p)  (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
  76. #define STUNPUTC(p) (++sstrnleft, --p)
  77. #define STTOPC(p)   p[-1]
  78. #define STADJUST(amount, p) (p += (amount), sstrnleft -= (amount))
  79. #define grabstackstr(p) stalloc(stackblocksize() - sstrnleft)
  80.  
  81. #define ckfree(p)   free((pointer)(p))
  82.