date and time created 91/03/07 20:27:41 by bostic

SCCS-vsn: bin/sh/memalloc.h 5.1

diff --git a/usr/src/bin/sh/memalloc.h b/usr/src/bin/sh/memalloc.h
new file mode 100644 (file)
index 0000000..88c6d38
--- /dev/null
+++ b/usr/src/bin/sh/memalloc.h
@@ -0,0 +1,69 @@
+/*-
+ * Copyright (c) 1991 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Kenneth Almquist.
+ *
+ * %sccs.include.redist.c%
+ *
+ *     @(#)memalloc.h  5.1 (Berkeley) %G%
+ */
+
+struct stackmark {
+       struct stack_block *stackp;
+       char *stacknxt;
+       int stacknleft;
+};
+
+
+extern char *stacknxt;
+extern int stacknleft;
+extern int sstrnleft;
+extern int herefd;
+
+#ifdef __STDC__
+pointer ckmalloc(int);
+pointer ckrealloc(pointer, int);
+void free(pointer);            /* defined in C library */
+char *savestr(char *);
+pointer stalloc(int);
+void stunalloc(pointer);
+void setstackmark(struct stackmark *);
+void popstackmark(struct stackmark *);
+void growstackblock(void);
+void grabstackblock(int);
+char *growstackstr(void);
+char *makestrspace(void);
+void ungrabstackstr(char *, char *);
+#else
+pointer ckmalloc();
+pointer ckrealloc();
+void free();           /* defined in C library */
+char *savestr();
+pointer stalloc();
+void stunalloc();
+void setstackmark();
+void popstackmark();
+void growstackblock();
+void grabstackblock();
+char *growstackstr();
+char *makestrspace();
+void ungrabstackstr();
+#endif
+
+
+
+#define stackblock() stacknxt
+#define stackblocksize() stacknleft
+#define STARTSTACKSTR(p)       p = stackblock(), sstrnleft = stackblocksize()
+#define STPUTC(c, p)   (--sstrnleft >= 0? (*p++ = (c)) : (p = growstackstr(), *p++ = (c)))
+#define CHECKSTRSPACE(n, p)    if (sstrnleft < n) p = makestrspace(); else
+#define USTPUTC(c, p)  (--sstrnleft, *p++ = (c))
+#define STACKSTRNUL(p) (sstrnleft == 0? (p = growstackstr(), *p = '\0') : (*p = '\0'))
+#define STUNPUTC(p)    (++sstrnleft, --p)
+#define STTOPC(p)      p[-1]
+#define STADJUST(amount, p)    (p += (amount), sstrnleft -= (amount))
+#define grabstackstr(p)        stalloc(stackblocksize() - sstrnleft)
+
+#define ckfree(p)      free((pointer)(p))