Initial revision

1 files changed, 56 insertions, 0 deletions

diff --git a/src/puresize.h b/src/puresize.h
new file mode 100644
index 00000000000..4934ba5f5bc
--- /dev/null
+++ b/src/puresize.h
@@ -0,0 +1,56 @@
+/* How much read-only Lisp storage a dumped Emacs needs.
+   Copyright (C) 1991 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* # bytes of pure Lisp code to leave space for.
+
+   At one point, this was defined in config.h, meaning that changing
+   PURESIZE would make Make recompile all of Emacs.  But only a few
+   files actually use PURESIZE, so we split it out to its own .h file.  */
+
+#define PURESIZE 200000
+
+#ifdef VIRT_ADDR_VARIES
+
+/* For machines like APOLLO where text and data can go anywhere
+   in virtual memory.  */
+#define CHECK_IMPURE(obj) \
+  { extern int pure[]; \
+    if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) \
+        && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) \
+      pure_write_error (); }
+
+#else /* not VIRT_ADDR_VARIES */
+#ifdef PNTR_COMPARISON_TYPE
+
+/* when PNTR_COMPARISON_TYPE is not the default (unsigned int) */
+#define CHECK_IMPURE(obj) \
+  { extern int my_edata; \
+    if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) &my_edata) \
+      pure_write_error (); }
+
+#else /* not VIRT_ADDRESS_VARIES, not PNTR_COMPARISON_TYPE */
+
+#define CHECK_IMPURE(obj) \
+  { extern int my_edata; \
+    if (XPNTR (obj) < (unsigned int) &my_edata) \
+      pure_write_error (); }
+
+#endif /* PNTR_COMPARISON_TYPE */
+#endif /* VIRT_ADDRESS_VARIES */
+