userdiff: add xdiff_clear_find_func()

xdiff_set_find_func() is used to set user defined regular expressions
for finding function signatures.  Add xdiff_clear_find_func(), which
frees the memory allocated by the former, making the API complete.

Also, use the new function in diff.c (the only call site of
xdiff_set_find_func()) to clean up after ourselves.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/diff.c b/diff.c
index 43835d756c2c2c7ec579e1c38804fe33a706944f..892921cdc71e75b7dfecf9bc3fcc04147576c1a3 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -1603,6 +1603,7 @@ static void builtin_diff(const char *name_a,
                        free(mf1.ptr);
                if (textconv_two)
                        free(mf2.ptr);
+               xdiff_clear_find_func(&xecfg);
        }
 
  free_ab_and_return:

diff --git a/xdiff-interface.c b/xdiff-interface.c
index b9b0db8d86615d6ca1046b932772f3d9750a8062..01f14fb50f7cf1387898a0c8db44f966ce07b720 100644 (file)
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -309,6 +309,21 @@ void xdiff_set_find_func(xdemitconf_t *xecfg, const char *value, int cflags)
        }
 }
 
+void xdiff_clear_find_func(xdemitconf_t *xecfg)
+{
+       if (xecfg->find_func) {
+               int i;
+               struct ff_regs *regs = xecfg->find_func_priv;
+
+               for (i = 0; i < regs->nr; i++)
+                       regfree(&regs->array[i].re);
+               free(regs->array);
+               free(regs);
+               xecfg->find_func = NULL;
+               xecfg->find_func_priv = NULL;
+       }
+}
+
 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 7352b9a9c204c2b1d4ca9df5ce040fe22d6f521c..55572c39a10dee336355f816b324946fc087d6e7 100644 (file)
--- a/xdiff-interface.h
+++ b/xdiff-interface.h
@@ -21,6 +21,7 @@ int read_mmfile(mmfile_t *ptr, const char *filename);
 int buffer_is_binary(const char *ptr, unsigned long size);
 
 extern void xdiff_set_find_func(xdemitconf_t *xecfg, const char *line, int cflags);
+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;