From: Stefan Beller <sbeller@google.com>
To: gitster@pobox.com
Cc: git@vger.kernel.org, jrnieder@gmail.com, l.s.r@web.de,
peff@peff.net, sbeller@google.com
Subject: [PATCH 1/2] xdiff-interface: export comparing and hashing strings
Date: Wed, 25 Oct 2017 11:49:11 -0700 [thread overview]
Message-ID: <20171025184912.21657-2-sbeller@google.com> (raw)
In-Reply-To: <20171025184912.21657-1-sbeller@google.com>
This will turn out to be useful in a later patch.
xdl_recmatch is exported in xdiff/xutils.h, to be used by various
xdiff/*.c files, but not outside of xdiff/. This one makes it available
to the outside, too.
While at it, add documentation.
Signed-off-by: Stefan Beller <sbeller@google.com>
---
xdiff-interface.c | 12 ++++++++++++
xdiff-interface.h | 16 ++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/xdiff-interface.c b/xdiff-interface.c
index 018e033089..770e1f7f81 100644
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -5,6 +5,7 @@
#include "xdiff/xdiffi.h"
#include "xdiff/xemit.h"
#include "xdiff/xmacros.h"
+#include "xdiff/xutils.h"
struct xdiff_emit_state {
xdiff_emit_consume_fn consume;
@@ -296,6 +297,17 @@ void xdiff_clear_find_func(xdemitconf_t *xecfg)
}
}
+unsigned long xdiff_hash_string(const char *s, size_t len, long flags)
+{
+ return xdl_hash_record(&s, s + len, flags);
+}
+
+int xdiff_compare_lines(const char *l1, long s1,
+ const char *l2, long s2, long flags)
+{
+ return xdl_recmatch(l1, s1, l2, s2, flags);
+}
+
int git_xmerge_style = -1;
int git_xmerge_config(const char *var, const char *value, void *cb)
diff --git a/xdiff-interface.h b/xdiff-interface.h
index 6f6ba9095d..135fc05d72 100644
--- a/xdiff-interface.h
+++ b/xdiff-interface.h
@@ -29,4 +29,20 @@ extern void xdiff_clear_find_func(xdemitconf_t *xecfg);
extern int git_xmerge_config(const char *var, const char *value, void *cb);
extern int git_xmerge_style;
+/*
+ * Compare the strings l1 with l2 which are of size s1 and s2 respectively.
+ * Returns 1 if the strings are deemed equal, 0 otherwise.
+ * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
+ * are treated for the comparision.
+ */
+extern int xdiff_compare_lines(const char *l1, long s1,
+ const char *l2, long s2, long flags);
+
+/*
+ * Returns a hash of the string s of length len.
+ * The `flags` given as XDF_WHITESPACE_FLAGS determine how white spaces
+ * are treated for the hash.
+ */
+extern unsigned long xdiff_hash_string(const char *s, size_t len, long flags);
+
#endif
--
2.15.0.rc2.6.g953226eb5f
next prev parent reply other threads:[~2017-10-25 18:50 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-24 18:59 [PATCH 0/4] (x)diff cleanup: remove duplicate code Stefan Beller
2017-10-24 18:59 ` [PATCH 1/4] hashmap: introduce memhash_feed to access the internals of FNV-1 hash Stefan Beller
2017-10-24 20:23 ` René Scharfe
2017-10-24 20:48 ` Stefan Beller
2017-10-24 18:59 ` [PATCH 2/4] xdiff-interface: export comparing and hashing strings Stefan Beller
2017-10-24 20:23 ` René Scharfe
2017-10-24 20:42 ` Stefan Beller
2017-10-26 17:03 ` René Scharfe
2017-10-24 18:59 ` [PATCH 3/4] xdiff: use stronger hash function internally Stefan Beller
2017-10-24 20:23 ` René Scharfe
2017-10-24 20:46 ` Stefan Beller
2017-10-24 23:04 ` Jonathan Nieder
2017-10-24 18:59 ` [PATCH 4/4] diff.c: get rid of duplicate implementation Stefan Beller
2017-10-24 19:02 ` [PATCH 0/4] (x)diff cleanup: remove duplicate code Stefan Beller
2017-10-24 23:42 ` [PATCHv2 0/2] " Stefan Beller
2017-10-24 23:42 ` [PATCH 1/2] xdiff-interface: export comparing and hashing strings Stefan Beller
2017-10-25 4:26 ` Eric Sunshine
2017-10-24 23:42 ` [PATCH 2/2] diff.c: get rid of duplicate implementation Stefan Beller
2017-10-25 5:11 ` [PATCHv2 0/2] (x)diff cleanup: remove duplicate code Junio C Hamano
2017-10-25 18:47 ` Stefan Beller
2017-10-25 18:49 ` [PATCHv3 " Stefan Beller
2017-10-25 18:49 ` Stefan Beller [this message]
2017-10-26 17:12 ` [PATCH 1/2] xdiff-interface: export comparing and hashing strings René Scharfe
2017-10-27 7:12 ` Junio C Hamano
2017-10-27 17:15 ` Stefan Beller
2017-10-25 18:49 ` [PATCH 2/2] diff.c: get rid of duplicate implementation Stefan Beller
2017-10-26 2:23 ` Junio C Hamano
2017-10-26 17:43 ` René Scharfe
2017-10-30 17:59 ` Jeff King
2017-10-30 19:07 ` Jeff King
2017-10-24 23:45 ` [PATCH 1/5] fnv: migrate code from hashmap to fnv Stefan Beller
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