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[Guile-commits] GNU Guile branch, stable-2.0, updated. v2.0.3-140-g69cd5
From: |
Mark H Weaver |
Subject: |
[Guile-commits] GNU Guile branch, stable-2.0, updated. v2.0.3-140-g69cd529 |
Date: |
Tue, 10 Jan 2012 15:28:22 +0000 |
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the project "GNU Guile".
http://git.savannah.gnu.org/cgit/guile.git/commit/?id=69cd5299e308571149d15eac774ee23fc97ecb0e
The branch, stable-2.0 has been updated
via 69cd5299e308571149d15eac774ee23fc97ecb0e (commit)
from 17bec5451bfb14c1412669a40b78e483dfe56933 (commit)
Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.
- Log -----------------------------------------------------------------
commit 69cd5299e308571149d15eac774ee23fc97ecb0e
Author: Mark H Weaver <address@hidden>
Date: Tue Jan 10 10:13:43 2012 -0500
Use a common null stringbuf in `scm_i_make_string'
* libguile/strings.c (scm_i_make_string): Use a common null stringbuf
for newly-allocated empty strings.
-----------------------------------------------------------------------
Summary of changes:
libguile/strings.c | 16 +++++++++++++++-
1 files changed, 15 insertions(+), 1 deletions(-)
diff --git a/libguile/strings.c b/libguile/strings.c
index 5dcb321..8491b1e 100644
--- a/libguile/strings.c
+++ b/libguile/strings.c
@@ -267,8 +267,22 @@ SCM scm_nullstr;
SCM
scm_i_make_string (size_t len, char **charsp, int read_only_p)
{
- SCM buf = make_stringbuf (len);
+ static SCM null_stringbuf = SCM_BOOL_F;
+ SCM buf;
SCM res;
+
+ if (len == 0)
+ {
+ if (SCM_UNLIKELY (scm_is_false (null_stringbuf)))
+ {
+ null_stringbuf = make_stringbuf (0);
+ SET_STRINGBUF_SHARED (null_stringbuf);
+ }
+ buf = null_stringbuf;
+ }
+ else
+ buf = make_stringbuf (len);
+
if (charsp)
*charsp = (char *) STRINGBUF_CHARS (buf);
res = scm_double_cell (read_only_p ? RO_STRING_TAG : STRING_TAG,
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