projects / unix-history / blame
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|---|---|---|
| d0e84df6 KB |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Kenneth Almquist. | |
| 7 | * | |
| 8 | * %sccs.include.redist.c% | |
| 9 | * | |
| 10 | * @(#)memalloc.h 5.1 (Berkeley) %G% | |
| 11 | */ | |
| 12 | ||
| 13 | struct stackmark { | |
| 14 | struct stack_block *stackp; | |
| 15 | char *stacknxt; | |
| 16 | int stacknleft; | |
| 17 | }; | |
| 18 | ||
| 19 | ||
| 20 | extern char *stacknxt; | |
| 21 | extern int stacknleft; | |
| 22 | extern int sstrnleft; | |
| 23 | extern int herefd; | |
| 24 | ||
| 25 | #ifdef __STDC__ | |
| 26 | pointer ckmalloc(int); | |
| 27 | pointer ckrealloc(pointer, int); | |
| 28 | void free(pointer); /* defined in C library */ | |
| 29 | char *savestr(char *); | |
| 30 | pointer stalloc(int); | |
| 31 | void stunalloc(pointer); | |
| 32 | void setstackmark(struct stackmark *); | |
| 33 | void popstackmark(struct stackmark *); | |
| 34 | void growstackblock(void); | |
| 35 | void grabstackblock(int); | |
| 36 | char *growstackstr(void); | |
| 37 | char *makestrspace(void); | |
| 38 | void ungrabstackstr(char *, char *); | |
| 39 | #else | |
| 40 | pointer ckmalloc(); | |
| 41 | pointer ckrealloc(); | |
| 42 | void free(); /* defined in C library */ | |
| 43 | char *savestr(); | |
| 44 | pointer stalloc(); | |
| 45 | void stunalloc(); | |
| 46 | void setstackmark(); | |
| 47 | void popstackmark(); | |
| 48 | void growstackblock(); | |
| 49 | void grabstackblock(); | |
| 50 | char *growstackstr(); | |
| 51 | char *makestrspace(); | |
| 52 | void ungrabstackstr(); | |
| 53 | #endif | |
| 54 | ||
| 55 | ||
| 56 | ||
| 57 | #define stackblock() stacknxt | |
| 58 | #define stackblocksize() stacknleft | |
| 59 | #define STARTSTACKSTR(p) p = stackblock(), sstrnleft = stackblocksize() | |
| 60 | #define STPUTC(c, p) (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c))) | |
| 61 | #define CHECKSTRSPACE(n, p) if (sstrnleft < n) p = makestrspace(); else | |
| 62 | #define USTPUTC(c, p) (--sstrnleft, *p++ = (c)) | |
| 63 | #define STACKSTRNUL(p) (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0')) | |
| 64 | #define STUNPUTC(p) (++sstrnleft, --p) | |
| 65 | #define STTOPC(p) p[-1] | |
| 66 | #define STADJUST(amount, p) (p += (amount), sstrnleft -= (amount)) | |
| 67 | #define grabstackstr(p) stalloc(stackblocksize() - sstrnleft) | |
| 68 | ||
| 69 | #define ckfree(p) free((pointer)(p)) |