xdi_diff_outf() overrides the structure members of its last parameter,
ignoring any value that callers pass in. It's no surprise then that all
callers pass a pointer to an uninitialized structure. They also don't
read it after the call, so the parameter is neither used for input nor
for output. Turn it into a local variable of xdi_diff_outf().
Signed-off-by: Rene Scharfe <rene.scharfe@xxxxxxxxxxxxxx>
---
combine-diff.c | 3 +--
diff.c | 15 +++++----------
xdiff-interface.c | 11 ++++++-----
xdiff-interface.h | 3 +--
4 files changed, 13 insertions(+), 19 deletions(-)
diff --git a/combine-diff.c b/combine-diff.c
index 3480dae..7557136 100644
--- a/combine-diff.c
+++ b/combine-diff.c
@@ -211,7 +211,6 @@ static void combine_diff(const unsigned char *parent, unsigned int mode,
xpparam_t xpp;
xdemitconf_t xecfg;
mmfile_t parent_file;
- xdemitcb_t ecb;
struct combine_diff_state state;
unsigned long sz;
@@ -231,7 +230,7 @@ static void combine_diff(const unsigned char *parent, unsigned int mode,
state.n = n;
xdi_diff_outf(&parent_file, result_file, consume_line, &state,
- &xpp, &xecfg, &ecb);
+ &xpp, &xecfg);
free(parent_file.ptr);
/* Assign line numbers for this parent.
diff --git a/diff.c b/diff.c
index d0ecbc3..e40c127 100644
--- a/diff.c
+++ b/diff.c
@@ -700,7 +700,6 @@ static void diff_words_show(struct diff_words_data *diff_words)
{
xpparam_t xpp;
xdemitconf_t xecfg;
- xdemitcb_t ecb;
mmfile_t minus, plus;
/* special case: only removal */
@@ -722,7 +721,7 @@ static void diff_words_show(struct diff_words_data *diff_words)
/* as only the hunk header will be parsed, we need a 0-context */
xecfg.ctxlen = 0;
xdi_diff_outf(&minus, &plus, fn_out_diff_words_aux, diff_words,
- &xpp, &xecfg, &ecb);
+ &xpp, &xecfg);
free(minus.ptr);
free(plus.ptr);
if (diff_words->current_plus != diff_words->plus.text.ptr +
@@ -1708,7 +1707,6 @@ static void builtin_diff(const char *name_a,
const char *diffopts = getenv("GIT_DIFF_OPTS");
xpparam_t xpp;
xdemitconf_t xecfg;
- xdemitcb_t ecb;
struct emit_callback ecbdata;
const struct userdiff_funcname *pe;
@@ -1780,7 +1778,7 @@ static void builtin_diff(const char *name_a,
}
}
xdi_diff_outf(&mf1, &mf2, fn_out_consume, &ecbdata,
- &xpp, &xecfg, &ecb);
+ &xpp, &xecfg);
if (DIFF_OPT_TST(o, COLOR_DIFF_WORDS))
free_diff_words_data(&ecbdata);
if (textconv_one)
@@ -1833,13 +1831,12 @@ static void builtin_diffstat(const char *name_a, const char *name_b,
/* Crazy xdl interfaces.. */
xpparam_t xpp;
xdemitconf_t xecfg;
- xdemitcb_t ecb;
memset(&xpp, 0, sizeof(xpp));
memset(&xecfg, 0, sizeof(xecfg));
xpp.flags = XDF_NEED_MINIMAL | o->xdl_opts;
xdi_diff_outf(&mf1, &mf2, diffstat_consume, diffstat,
- &xpp, &xecfg, &ecb);
+ &xpp, &xecfg);
}
free_and_return:
@@ -1881,14 +1878,13 @@ static void builtin_checkdiff(const char *name_a, const char *name_b,
/* Crazy xdl interfaces.. */
xpparam_t xpp;
xdemitconf_t xecfg;
- xdemitcb_t ecb;
memset(&xpp, 0, sizeof(xpp));
memset(&xecfg, 0, sizeof(xecfg));
xecfg.ctxlen = 1; /* at least one context line */
xpp.flags = XDF_NEED_MINIMAL;
xdi_diff_outf(&mf1, &mf2, checkdiff_consume, &data,
- &xpp, &xecfg, &ecb);
+ &xpp, &xecfg);
if (data.ws_rule & WS_BLANK_AT_EOF) {
struct emit_callback ecbdata;
@@ -3383,7 +3379,6 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
for (i = 0; i < q->nr; i++) {
xpparam_t xpp;
xdemitconf_t xecfg;
- xdemitcb_t ecb;
mmfile_t mf1, mf2;
struct diff_filepair *p = q->queue[i];
int len1, len2;
@@ -3445,7 +3440,7 @@ static int diff_get_patch_id(struct diff_options *options, unsigned char *sha1)
xecfg.ctxlen = 3;
xecfg.flags = XDL_EMIT_FUNCNAMES;
xdi_diff_outf(&mf1, &mf2, patch_id_consume, &data,
- &xpp, &xecfg, &ecb);
+ &xpp, &xecfg);
}
git_SHA1_Final(sha1, &ctx);
diff --git a/xdiff-interface.c b/xdiff-interface.c
index ca5e3fb..cd2285d 100644
--- a/xdiff-interface.c
+++ b/xdiff-interface.c
@@ -138,19 +138,20 @@ int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t co
int xdi_diff_outf(mmfile_t *mf1, mmfile_t *mf2,
xdiff_emit_consume_fn fn, void *consume_callback_data,
- xpparam_t const *xpp,
- xdemitconf_t const *xecfg, xdemitcb_t *xecb)
+ xpparam_t const *xpp, xdemitconf_t const *xecfg)
{
int ret;
struct xdiff_emit_state state;
+ xdemitcb_t ecb;
memset(&state, 0, sizeof(state));
state.consume = fn;
state.consume_callback_data = consume_callback_data;
- xecb->outf = xdiff_outf;
- xecb->priv = &state;
+ memset(&ecb, 0, sizeof(ecb));
+ ecb.outf = xdiff_outf;
+ ecb.priv = &state;
strbuf_init(&state.remainder, 0);
- ret = xdi_diff(mf1, mf2, xpp, xecfg, xecb);
+ ret = xdi_diff(mf1, mf2, xpp, xecfg, &ecb);
strbuf_release(&state.remainder);
return ret;
}
diff --git a/xdiff-interface.h b/xdiff-interface.h
index abba70c..49d1116 100644
--- a/xdiff-interface.h
+++ b/xdiff-interface.h
@@ -9,8 +9,7 @@ typedef void (*xdiff_emit_hunk_consume_fn)(void *, long, long, long);
int xdi_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp, xdemitconf_t const *xecfg, xdemitcb_t *ecb);
int xdi_diff_outf(mmfile_t *mf1, mmfile_t *mf2,
xdiff_emit_consume_fn fn, void *consume_callback_data,
- xpparam_t const *xpp,
- xdemitconf_t const *xecfg, xdemitcb_t *xecb);
+ xpparam_t const *xpp, xdemitconf_t const *xecfg);
int xdi_diff_hunks(mmfile_t *mf1, mmfile_t *mf2,
xdiff_emit_hunk_consume_fn fn, void *consume_callback_data,
xpparam_t const *xpp, xdemitconf_t *xecfg);
--
1.7.1
--
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