[PATCH] xdiff: print post-image for common records instead of pre-image
- From
René Scharfe <rene.scharfe@lsrfire.ath.cx>
- Date
- Jan 6, 2012, 17:13 UTC
- Message-ID
- <4F072B9C.1030005@lsrfire.ath.cx>
- In-Reply-To
- <7vlipx4q3r.fsf@alter.siamese.dyndns.org>
Normally it doesn't matter if we show the pre-image or th post-image for the common parts of a diff because they are the same. If white-space changes are ignored they can differ, though. The new text after applying the diff is more interesting in that case, so show that instead of the old contents.
Note: GNU diff shows the pre-image.
Suggested-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> --- t/t4015-diff-whitespace.sh | 14 +++++++------- xdiff/xemit.c | 12 ++++++------ 2 files changed, 13 insertions(+), 13 deletions(-)
diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh index 9059bcd..cc3db13 100755 --- a/t/t4015-diff-whitespace.sh +++ b/t/t4015-diff-whitespace.sh @@ -103,7 +103,7 @@ test_expect_success 'another test, with -w --ignore-space-at-eol' 'test_cmp expe git diff -w -b --ignore-space-at-eol > out test_expect_success 'another test, with -w -b --ignore-space-at-eol' 'test_cmp expect out' -tr 'Q' '\015' << EOF > expect +tr 'Q_' '\015 ' << EOF > expect diff --git a/x b/x index d99af23..8b32fb5 100644 --- a/x @@ -111,19 +111,19 @@ index d99af23..8b32fb5 100644 @@ -1,6 +1,6 @@ -whitespace at beginning + whitespace at beginning - whitespace change + whitespace change -whitespace in the middle +white space in the middle - whitespace at end + whitespace at end__ unchanged line - CR at endQ + CR at end EOF git diff -b > out test_expect_success 'another test, with -b' 'test_cmp expect out' git diff -b --ignore-space-at-eol > out test_expect_success 'another test, with -b --ignore-space-at-eol' 'test_cmp expect out' -tr 'Q' '\015' << EOF > expect +tr 'Q_' '\015 ' << EOF > expect diff --git a/x b/x index d99af23..8b32fb5 100644 --- a/x @@ -135,9 +135,9 @@ index d99af23..8b32fb5 100644 + whitespace at beginning +whitespace change +white space in the middle - whitespace at end + whitespace at end__ unchanged line - CR at endQ + CR at end EOF git diff --ignore-space-at-eol > out test_expect_success 'another test, with --ignore-space-at-eol' 'test_cmp expect out' diff --git a/xdiff/xemit.c b/xdiff/xemit.c index 2e669c3..d11dbf9 100644 --- a/xdiff/xemit.c +++ b/xdiff/xemit.c @@ -87,7 +87,7 @@ static long def_ff(const char *rec, long len, char *buf, long sz, void *priv) static int xdl_emit_common(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, xdemitconf_t const *xecfg) { - xdfile_t *xdf = &xe->xdf1; + xdfile_t *xdf = &xe->xdf2; const char *rchg = xdf->rchg; long ix; @@ -204,8 +204,8 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, /* * Emit pre-context. */ - for (; s1 < xch->i1; s1++) - if (xdl_emit_record(&xe->xdf1, s1, " ", ecb) < 0) + for (; s2 < xch->i2; s2++) + if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0) return -1; for (s1 = xch->i1, s2 = xch->i2;; xch = xch->next) { @@ -213,7 +213,7 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, * Merge previous with current change atom. */ for (; s1 < xch->i1 && s2 < xch->i2; s1++, s2++) - if (xdl_emit_record(&xe->xdf1, s1, " ", ecb) < 0) + if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0) return -1; /* @@ -239,8 +239,8 @@ int xdl_emit_diff(xdfenv_t *xe, xdchange_t *xscr, xdemitcb_t *ecb, /* * Emit post-context. */ - for (s1 = xche->i1 + xche->chg1; s1 < e1; s1++) - if (xdl_emit_record(&xe->xdf1, s1, " ", ecb) < 0) + for (s2 = xche->i2 + xche->chg2; s2 < e2; s2++) + if (xdl_emit_record(&xe->xdf2, s2, " ", ecb) < 0) return -1; }
-- 1.7.8.2