remove ecb parameter from xdi_diff_outf()

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@lsrfire.ath.cx>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/combine-diff.c b/combine-diff.c
index 3480dae82416bda357dee2f0d545ac6dadc6a26f..7557136c820a10570e72f6870ecc7a45c4c7ce36 100644 (file)
--- 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 edec0f6b818541b79e2773934ab1d28ce279805c..a2d8c7f9a7a3bbfca889dedfbda8d6f351fbf016 100644 (file)
--- a/diff.c
+++ b/diff.c
@@ -696,7 +696,6 @@ 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 */
@@ -718,7 +717,7 @@ 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 +
@@ -1704,7 +1703,6 @@ 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;
 
@@ -1776,7 +1774,7 @@ 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)
@@ -1829,13 +1827,12 @@ 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:
@@ -1877,14 +1874,13 @@ 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;
@@ -3361,7 +3357,6 @@ 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;
@@ -3423,7 +3418,7 @@ 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 01f14fb50f7cf1387898a0c8db44f966ce07b720..3cf39c39c47301fb39cbe859d5165179c13fe752 100644 (file)
--- 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 55572c39a10dee336355f816b324946fc087d6e7..0cd4511bf797afb06d2d50024a8834766c12e9e1 100644 (file)
--- 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);