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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)) |