| 1 | /*-
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| 2 | * Copyright (c) 1991 The Regents of the University of California.
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * This code is derived from software contributed to Berkeley by
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| 6 | * Kenneth Almquist.
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| 7 | *
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| 8 | * Redistribution and use in source and binary forms, with or without
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| 9 | * modification, are permitted provided that the following conditions
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| 10 | * are met:
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| 11 | * 1. Redistributions of source code must retain the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer.
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| 13 | * 2. Redistributions in binary form must reproduce the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer in the
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| 15 | * documentation and/or other materials provided with the distribution.
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| 16 | * 3. All advertising materials mentioning features or use of this software
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| 17 | * must display the following acknowledgement:
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| 18 | * This product includes software developed by the University of
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| 19 | * California, Berkeley and its contributors.
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| 20 | * 4. Neither the name of the University nor the names of its contributors
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| 21 | * may be used to endorse or promote products derived from this software
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| 22 | * without specific prior written permission.
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| 23 | *
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| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 34 | * SUCH DAMAGE.
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| 35 | *
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| 36 | * @(#)memalloc.h 5.1 (Berkeley) 3/7/91
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| 37 | */
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| 38 |
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| 39 | struct stackmark {
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| 40 | struct stack_block *stackp;
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| 41 | char *stacknxt;
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| 42 | int stacknleft;
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| 43 | };
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| 44 |
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| 45 |
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| 46 | extern char *stacknxt;
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| 47 | extern int stacknleft;
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| 48 | extern int sstrnleft;
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| 49 | extern int herefd;
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| 50 |
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| 51 | #ifdef __STDC__
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| 52 | pointer ckmalloc(int);
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| 53 | pointer ckrealloc(pointer, int);
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| 54 | void free(pointer); /* defined in C library */
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| 55 | char *savestr(char *);
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| 56 | pointer stalloc(int);
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| 57 | void stunalloc(pointer);
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| 58 | void setstackmark(struct stackmark *);
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| 59 | void popstackmark(struct stackmark *);
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| 60 | void growstackblock(void);
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| 61 | void grabstackblock(int);
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| 62 | char *growstackstr(void);
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| 63 | char *makestrspace(void);
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| 64 | void ungrabstackstr(char *, char *);
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| 65 | #else
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| 66 | pointer ckmalloc();
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| 67 | pointer ckrealloc();
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| 68 | void free(); /* defined in C library */
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| 69 | char *savestr();
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| 70 | pointer stalloc();
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| 71 | void stunalloc();
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| 72 | void setstackmark();
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| 73 | void popstackmark();
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| 74 | void growstackblock();
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| 75 | void grabstackblock();
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| 76 | char *growstackstr();
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| 77 | char *makestrspace();
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| 78 | void ungrabstackstr();
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| 79 | #endif
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| 80 |
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| 81 |
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| 82 |
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| 83 | #define stackblock() stacknxt
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| 84 | #define stackblocksize() stacknleft
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| 85 | #define STARTSTACKSTR(p) p = stackblock(), sstrnleft = stackblocksize()
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| 86 | #define STPUTC(c, p) (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
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| 87 | #define CHECKSTRSPACE(n, p) if (sstrnleft < n) p = makestrspace(); else
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| 88 | #define USTPUTC(c, p) (--sstrnleft, *p++ = (c))
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| 89 | #define STACKSTRNUL(p) (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
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| 90 | #define STUNPUTC(p) (++sstrnleft, --p)
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| 91 | #define STTOPC(p) p[-1]
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| 92 | #define STADJUST(amount, p) (p += (amount), sstrnleft -= (amount))
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| 93 | #define grabstackstr(p) stalloc(stackblocksize() - sstrnleft)
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| 94 |
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| 95 | #define ckfree(p) free((pointer)(p))
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