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-rw-r--r--xdiff/xmerge.c98
1 files changed, 80 insertions, 18 deletions
diff --git a/xdiff/xmerge.c b/xdiff/xmerge.c
index 625198e05..d98f430c9 100644
--- a/xdiff/xmerge.c
+++ b/xdiff/xmerge.c
@@ -109,7 +109,7 @@ static int xdl_merge_cmp_lines(xdfenv_t *xe1, int i1, xdfenv_t *xe2, int i2,
return 0;
}
-static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int add_nl, char *dest)
+static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int needs_cr, int add_nl, char *dest)
{
xrecord_t **recs;
int size = 0;
@@ -125,6 +125,12 @@ static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int add
if (add_nl) {
i = recs[count - 1]->size;
if (i == 0 || recs[count - 1]->ptr[i - 1] != '\n') {
+ if (needs_cr) {
+ if (dest)
+ dest[size] = '\r';
+ size++;
+ }
+
if (dest)
dest[size] = '\n';
size++;
@@ -133,14 +139,58 @@ static int xdl_recs_copy_0(int use_orig, xdfenv_t *xe, int i, int count, int add
return size;
}
-static int xdl_recs_copy(xdfenv_t *xe, int i, int count, int add_nl, char *dest)
+static int xdl_recs_copy(xdfenv_t *xe, int i, int count, int needs_cr, int add_nl, char *dest)
+{
+ return xdl_recs_copy_0(0, xe, i, count, needs_cr, add_nl, dest);
+}
+
+static int xdl_orig_copy(xdfenv_t *xe, int i, int count, int needs_cr, int add_nl, char *dest)
+{
+ return xdl_recs_copy_0(1, xe, i, count, needs_cr, add_nl, dest);
+}
+
+/*
+ * Returns 1 if the i'th line ends in CR/LF (if it is the last line and
+ * has no eol, the preceding line, if any), 0 if it ends in LF-only, and
+ * -1 if the line ending cannot be determined.
+ */
+static int is_eol_crlf(xdfile_t *file, int i)
{
- return xdl_recs_copy_0(0, xe, i, count, add_nl, dest);
+ long size;
+
+ if (i < file->nrec - 1)
+ /* All lines before the last *must* end in LF */
+ return (size = file->recs[i]->size) > 1 &&
+ file->recs[i]->ptr[size - 2] == '\r';
+ if (!file->nrec)
+ /* Cannot determine eol style from empty file */
+ return -1;
+ if ((size = file->recs[i]->size) &&
+ file->recs[i]->ptr[size - 1] == '\n')
+ /* Last line; ends in LF; Is it CR/LF? */
+ return size > 1 &&
+ file->recs[i]->ptr[size - 2] == '\r';
+ if (!i)
+ /* The only line has no eol */
+ return -1;
+ /* Determine eol from second-to-last line */
+ return (size = file->recs[i - 1]->size) > 1 &&
+ file->recs[i - 1]->ptr[size - 2] == '\r';
}
-static int xdl_orig_copy(xdfenv_t *xe, int i, int count, int add_nl, char *dest)
+static int is_cr_needed(xdfenv_t *xe1, xdfenv_t *xe2, xdmerge_t *m)
{
- return xdl_recs_copy_0(1, xe, i, count, add_nl, dest);
+ int needs_cr;
+
+ /* Match post-images' preceding, or first, lines' end-of-line style */
+ needs_cr = is_eol_crlf(&xe1->xdf2, m->i1 ? m->i1 - 1 : 0);
+ if (needs_cr)
+ needs_cr = is_eol_crlf(&xe2->xdf2, m->i2 ? m->i2 - 1 : 0);
+ /* Look at pre-image's first line, unless we already settled on LF */
+ if (needs_cr)
+ needs_cr = is_eol_crlf(&xe1->xdf1, 0);
+ /* If still undecided, use LF-only */
+ return needs_cr < 0 ? 0 : needs_cr;
}
static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
@@ -152,16 +202,17 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
int marker1_size = (name1 ? strlen(name1) + 1 : 0);
int marker2_size = (name2 ? strlen(name2) + 1 : 0);
int marker3_size = (name3 ? strlen(name3) + 1 : 0);
+ int needs_cr = is_cr_needed(xe1, xe2, m);
if (marker_size <= 0)
marker_size = DEFAULT_CONFLICT_MARKER_SIZE;
/* Before conflicting part */
- size += xdl_recs_copy(xe1, i, m->i1 - i, 0,
+ size += xdl_recs_copy(xe1, i, m->i1 - i, 0, 0,
dest ? dest + size : NULL);
if (!dest) {
- size += marker_size + 1 + marker1_size;
+ size += marker_size + 1 + needs_cr + marker1_size;
} else {
memset(dest + size, '<', marker_size);
size += marker_size;
@@ -170,17 +221,19 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
memcpy(dest + size + 1, name1, marker1_size - 1);
size += marker1_size;
}
+ if (needs_cr)
+ dest[size++] = '\r';
dest[size++] = '\n';
}
/* Postimage from side #1 */
- size += xdl_recs_copy(xe1, m->i1, m->chg1, 1,
+ size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, 1,
dest ? dest + size : NULL);
if (style == XDL_MERGE_DIFF3) {
/* Shared preimage */
if (!dest) {
- size += marker_size + 1 + marker3_size;
+ size += marker_size + 1 + needs_cr + marker3_size;
} else {
memset(dest + size, '|', marker_size);
size += marker_size;
@@ -189,25 +242,29 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
memcpy(dest + size + 1, name3, marker3_size - 1);
size += marker3_size;
}
+ if (needs_cr)
+ dest[size++] = '\r';
dest[size++] = '\n';
}
- size += xdl_orig_copy(xe1, m->i0, m->chg0, 1,
+ size += xdl_orig_copy(xe1, m->i0, m->chg0, needs_cr, 1,
dest ? dest + size : NULL);
}
if (!dest) {
- size += marker_size + 1;
+ size += marker_size + 1 + needs_cr;
} else {
memset(dest + size, '=', marker_size);
size += marker_size;
+ if (needs_cr)
+ dest[size++] = '\r';
dest[size++] = '\n';
}
/* Postimage from side #2 */
- size += xdl_recs_copy(xe2, m->i2, m->chg2, 1,
+ size += xdl_recs_copy(xe2, m->i2, m->chg2, needs_cr, 1,
dest ? dest + size : NULL);
if (!dest) {
- size += marker_size + 1 + marker2_size;
+ size += marker_size + 1 + needs_cr + marker2_size;
} else {
memset(dest + size, '>', marker_size);
size += marker_size;
@@ -216,6 +273,8 @@ static int fill_conflict_hunk(xdfenv_t *xe1, const char *name1,
memcpy(dest + size + 1, name2, marker2_size - 1);
size += marker2_size;
}
+ if (needs_cr)
+ dest[size++] = '\r';
dest[size++] = '\n';
}
return size;
@@ -241,21 +300,24 @@ static int xdl_fill_merge_buffer(xdfenv_t *xe1, const char *name1,
marker_size);
else if (m->mode & 3) {
/* Before conflicting part */
- size += xdl_recs_copy(xe1, i, m->i1 - i, 0,
+ size += xdl_recs_copy(xe1, i, m->i1 - i, 0, 0,
dest ? dest + size : NULL);
/* Postimage from side #1 */
- if (m->mode & 1)
- size += xdl_recs_copy(xe1, m->i1, m->chg1, (m->mode & 2),
+ if (m->mode & 1) {
+ int needs_cr = is_cr_needed(xe1, xe2, m);
+
+ size += xdl_recs_copy(xe1, m->i1, m->chg1, needs_cr, (m->mode & 2),
dest ? dest + size : NULL);
+ }
/* Postimage from side #2 */
if (m->mode & 2)
- size += xdl_recs_copy(xe2, m->i2, m->chg2, 0,
+ size += xdl_recs_copy(xe2, m->i2, m->chg2, 0, 0,
dest ? dest + size : NULL);
} else
continue;
i = m->i1 + m->chg1;
}
- size += xdl_recs_copy(xe1, i, xe1->xdf2.nrec - i, 0,
+ size += xdl_recs_copy(xe1, i, xe1->xdf2.nrec - i, 0, 0,
dest ? dest + size : NULL);
return size;
}
generated by cgit v1.2.1 (git 2.18.0) at 2024-12-26 17:48:03 +0000