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Diffstat (limited to 'usr/dash/memalloc.h')
| -rw-r--r-- | usr/dash/memalloc.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/usr/dash/memalloc.h b/usr/dash/memalloc.h new file mode 100644 index 0000000..4b5be46 --- /dev/null +++ b/usr/dash/memalloc.h @@ -0,0 +1,100 @@ +/*- + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * Copyright (c) 1997-2005 + * Herbert Xu <herbert@gondor.apana.org.au>. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Kenneth Almquist. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)memalloc.h 8.2 (Berkeley) 5/4/95 + */ + +#include <stddef.h> + +struct stackmark { + struct stack_block *stackp; + char *stacknxt; + size_t stacknleft; +}; + + +extern char *stacknxt; +extern size_t stacknleft; +extern char *sstrend; + +pointer ckmalloc(size_t); +pointer ckrealloc(pointer, size_t); +char *savestr(const char *); +pointer stalloc(size_t); +void stunalloc(pointer); +void pushstackmark(struct stackmark *mark, size_t len); +void setstackmark(struct stackmark *); +void popstackmark(struct stackmark *); +void growstackblock(void); +void *growstackstr(void); +char *makestrspace(size_t, char *); +char *stnputs(const char *, size_t, char *); +char *stputs(const char *, char *); + + +static inline void grabstackblock(size_t len) +{ + stalloc(len); +} + +static inline char *_STPUTC(int c, char *p) { + if (p == sstrend) + p = growstackstr(); + *p++ = c; + return p; +} + +#define stackblock() ((void *)stacknxt) +#define stackblocksize() stacknleft +#define STARTSTACKSTR(p) ((p) = stackblock()) +#define STPUTC(c, p) ((p) = _STPUTC((c), (p))) +#define CHECKSTRSPACE(n, p) \ + ({ \ + char *q = (p); \ + size_t l = (n); \ + size_t m = sstrend - q; \ + if (l > m) \ + (p) = makestrspace(l, q); \ + 0; \ + }) +#define USTPUTC(c, p) (*p++ = (c)) +#define STACKSTRNUL(p) ((p) == sstrend? (p = growstackstr(), *p = '\0') : (*p = '\0')) +#define STUNPUTC(p) (--p) +#define STTOPC(p) p[-1] +#define STADJUST(amount, p) (p += (amount)) + +#define grabstackstr(p) stalloc((char *)(p) - (char *)stackblock()) +#define ungrabstackstr(s, p) stunalloc((s)) +#define stackstrend() ((void *)sstrend) + +#define ckfree(p) free((pointer)(p)) |