BSD 4_4_Lite1 development

Work on file usr/src/contrib/gzip-1.2.4/msdos/tailor.c

Synthesized-from: CSRG/cd2/4.4BSD-Lite1

diff --git a/usr/src/contrib/gzip-1.2.4/msdos/tailor.c b/usr/src/contrib/gzip-1.2.4/msdos/tailor.c
new file mode 100644 (file)
index 0000000..4d41b22
--- /dev/null
+++ b/usr/src/contrib/gzip-1.2.4/msdos/tailor.c
@@ -0,0 +1,58 @@
+/* tailor.c -- target dependent functions
+ * Copyright (C) 1992-1993 Jean-loup Gailly
+ * This is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License, see the file COPYING.
+ */
+
+/* tailor.c is a bunch of non portable routines.
+ * It should be kept to a minimum.
+ */
+
+#include "tailor.h"
+#include "gzip.h"
+
+#ifndef lint
+static char rcsid[] = "$Id: tailor.c,v 0.8 1993/02/24 18:24:54 jloup Exp $";
+#endif
+
+#ifdef __TURBOC__
+
+/************************/
+/*  Function fcalloc()  */
+/************************/
+
+/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
+ * and farmalloc(64K) returns a pointer with an offset of 8, so we
+ * must fix the pointer. Warning: the pointer must be put back to its
+ * original form in order to free it, use fcfree().
+ * For MSC, use halloc instead of this function (see tailor.h).
+ */
+static ush ptr_offset = 0;
+
+void * fcalloc(items, size)
+    unsigned items; /* number of items */
+    unsigned size;  /* item size */
+{
+    void * buf = farmalloc((ulg)items*size + 16L);
+    if (buf == NULL) return NULL;
+    /* Normalize the pointer to seg:0 */
+    if (ptr_offset == 0) {
+       ptr_offset = (ush)((uch*)buf-0);
+    } else if (ptr_offset != (ush)((uch*)buf-0)) {
+       error("inconsistent ptr_offset");
+    }
+    *((ush*)&buf+1) += (ptr_offset + 15) >> 4;
+    *(ush*)&buf = 0;
+    return buf;
+}
+
+void fcfree(ptr)
+    void *ptr; /* region allocated with fcalloc() */
+{
+    /* Put the pointer back to its original form: */
+    *((ush*)&ptr+1) -= (ptr_offset + 15) >> 4;
+    *(ush*)&ptr = ptr_offset;
+    farfree(ptr);
+ }
+
+#endif /* __TURBOC__ */