From eefd727851555237c7bc205b7ad255c50ba3fff9 Mon Sep 17 00:00:00 2001
From: Dmitry Antipov
Date: Wed, 9 Jan 2013 17:50:22 +0400
Subject: * lisp.h (make_gap_1): New prototype. * buffer.h (GAP_BYTES_DFL,
 GAP_BYTES_MIN): New macros for the special gap size values. * editfns.c
 (Fbuffer_size): Rename from Fbufsize to fit the common naming convention.
 (syms_of_editfns): Adjust defsubr.  Drop commented-out obsolete code. *
 insdel.c (make_gap_larger): Use GAP_BYTES_DFL. (make_gap_smaller): Use
 GAP_BYTES_MIN.  Adjust comment. (make_gap_1): New function to adjust the gap
 of any buffer. * coding.c (coding_alloc_by_making_gap): Use it. * buffer.c
 (compact_buffer): Likewise.  Use BUF_Z_BYTE, BUF_GAP_SIZE, GAP_BYTES_DFL and
 GAP_BYTES_MIN.  Adjust comment.

---
 src/buffer.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'src/buffer.h')

diff --git a/src/buffer.h b/src/buffer.h
index eb6a9d4d3e1..ec9c34b3eb3 100644
--- a/src/buffer.h
+++ b/src/buffer.h
@@ -320,6 +320,16 @@ while (0)
 #define BUF_BYTES_MAX \
   (ptrdiff_t) min (MOST_POSITIVE_FIXNUM - 1, min (SIZE_MAX, PTRDIFF_MAX))
 
+/* Maximum gap size after compact_buffer, in bytes.  Also
+   used in make_gap_larger to get some extra reserved space.  */
+
+#define GAP_BYTES_DFL 2000
+
+/* Minimum gap size after compact_buffer, in bytes.  Also
+   used in make_gap_smaller to avoid too small gap size.  */
+
+#define GAP_BYTES_MIN 20
+
 /* Return the address of byte position N in current buffer.  */
 
 #define BYTE_POS_ADDR(n) \
-- 
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