It is technically allowed, as per C89, for functions' return type to
be complete structs (i.e. *not* just pointers to structs).
However, it was just an oversight of this developer when converting
Python code to C code in 6d297f8 (Status update on merge-recursive in
C, 2006-07-08) which introduced such a return type.
Besides, by converting this construct to pass in the struct, we can now
start returning a value that can indicate errors in future patches. This
will help the current effort to libify merge-recursive.c.
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
merge-recursive.c | 106 ++++++++++++++++++++++++++++--------------------------
1 file changed, 56 insertions(+), 50 deletions(-)
diff --git a/merge-recursive.c b/merge-recursive.c
index 2d4cb80..e1cea96 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -885,47 +885,47 @@ static int merge_3way(struct merge_options *o,
return merge_status;
}
-static struct merge_file_info merge_file_1(struct merge_options *o,
+static int merge_file_1(struct merge_options *o,
const struct diff_filespec *one,
const struct diff_filespec *a,
const struct diff_filespec *b,
const char *branch1,
- const char *branch2)
+ const char *branch2,
+ struct merge_file_info *result)
{
- struct merge_file_info result;
- result.merge = 0;
- result.clean = 1;
+ result->merge = 0;
+ result->clean = 1;
if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) {
- result.clean = 0;
+ result->clean = 0;
if (S_ISREG(a->mode)) {
- result.mode = a->mode;
- oidcpy(&result.oid, &a->oid);
+ result->mode = a->mode;
+ oidcpy(&result->oid, &a->oid);
} else {
- result.mode = b->mode;
- oidcpy(&result.oid, &b->oid);
+ result->mode = b->mode;
+ oidcpy(&result->oid, &b->oid);
}
} else {
if (!oid_eq(&a->oid, &one->oid) && !oid_eq(&b->oid, &one->oid))
- result.merge = 1;
+ result->merge = 1;
/*
* Merge modes
*/
if (a->mode == b->mode || a->mode == one->mode)
- result.mode = b->mode;
+ result->mode = b->mode;
else {
- result.mode = a->mode;
+ result->mode = a->mode;
if (b->mode != one->mode) {
- result.clean = 0;
- result.merge = 1;
+ result->clean = 0;
+ result->merge = 1;
}
}
if (oid_eq(&a->oid, &b->oid) || oid_eq(&a->oid, &one->oid))
- oidcpy(&result.oid, &b->oid);
+ oidcpy(&result->oid, &b->oid);
else if (oid_eq(&b->oid, &one->oid))
- oidcpy(&result.oid, &a->oid);
+ oidcpy(&result->oid, &a->oid);
else if (S_ISREG(a->mode)) {
mmbuffer_t result_buf;
int merge_status;
@@ -937,64 +937,66 @@ static struct merge_file_info merge_file_1(struct merge_options *o,
die(_("Failed to execute internal merge"));
if (write_sha1_file(result_buf.ptr, result_buf.size,
- blob_type, result.oid.hash))
+ blob_type, result->oid.hash))
die(_("Unable to add %s to database"),
a->path);
free(result_buf.ptr);
- result.clean = (merge_status == 0);
+ result->clean = (merge_status == 0);
} else if (S_ISGITLINK(a->mode)) {
- result.clean = merge_submodule(result.oid.hash,
+ result->clean = merge_submodule(result->oid.hash,
one->path,
one->oid.hash,
a->oid.hash,
b->oid.hash,
!o->call_depth);
} else if (S_ISLNK(a->mode)) {
- oidcpy(&result.oid, &a->oid);
+ oidcpy(&result->oid, &a->oid);
if (!oid_eq(&a->oid, &b->oid))
- result.clean = 0;
+ result->clean = 0;
} else
die("BUG: unsupported object type in the tree");
}
- return result;
+ return 0;
}
-static struct merge_file_info
-merge_file_special_markers(struct merge_options *o,
+static int merge_file_special_markers(struct merge_options *o,
const struct diff_filespec *one,
const struct diff_filespec *a,
const struct diff_filespec *b,
const char *branch1,
const char *filename1,
const char *branch2,
- const char *filename2)
+ const char *filename2,
+ struct merge_file_info *mfi)
{
char *side1 = NULL;
char *side2 = NULL;
- struct merge_file_info mfi;
+ int ret;
if (filename1)
side1 = xstrfmt("%s:%s", branch1, filename1);
if (filename2)
side2 = xstrfmt("%s:%s", branch2, filename2);
- mfi = merge_file_1(o, one, a, b,
- side1 ? side1 : branch1, side2 ? side2 : branch2);
+ ret = merge_file_1(o, one, a, b,
+ side1 ? side1 : branch1,
+ side2 ? side2 : branch2, mfi);
free(side1);
free(side2);
- return mfi;
+ return ret;
}
-static struct merge_file_info merge_file_one(struct merge_options *o,
+static int merge_file_one(struct merge_options *o,
const char *path,
const struct object_id *o_oid, int o_mode,
const struct object_id *a_oid, int a_mode,
const struct object_id *b_oid, int b_mode,
const char *branch1,
- const char *branch2)
+ const char *branch2,
+ struct merge_file_info *mfi)
{
struct diff_filespec one, a, b;
@@ -1005,7 +1007,7 @@ static struct merge_file_info merge_file_one(struct merge_options *o,
a.mode = a_mode;
oidcpy(&b.oid, b_oid);
b.mode = b_mode;
- return merge_file_1(o, &one, &a, &b, branch1, branch2);
+ return merge_file_1(o, &one, &a, &b, branch1, branch2, mfi);
}
static void handle_change_delete(struct merge_options *o,
@@ -1178,11 +1180,12 @@ static void conflict_rename_rename_1to2(struct merge_options *o,
struct merge_file_info mfi;
struct diff_filespec other;
struct diff_filespec *add;
- mfi = merge_file_one(o, one->path,
+ if (merge_file_one(o, one->path,
&one->oid, one->mode,
&a->oid, a->mode,
&b->oid, b->mode,
- ci->branch1, ci->branch2);
+ ci->branch1, ci->branch2, &mfi))
+ return;
/*
* FIXME: For rename/add-source conflicts (if we could detect
* such), this is wrong. We should instead find a unique
@@ -1236,12 +1239,13 @@ static void conflict_rename_rename_2to1(struct merge_options *o,
remove_file(o, 1, a->path, o->call_depth || would_lose_untracked(a->path));
remove_file(o, 1, b->path, o->call_depth || would_lose_untracked(b->path));
- mfi_c1 = merge_file_special_markers(o, a, c1, &ci->ren1_other,
- o->branch1, c1->path,
- o->branch2, ci->ren1_other.path);
- mfi_c2 = merge_file_special_markers(o, b, &ci->ren2_other, c2,
- o->branch1, ci->ren2_other.path,
- o->branch2, c2->path);
+ if (merge_file_special_markers(o, a, c1, &ci->ren1_other,
+ o->branch1, c1->path,
+ o->branch2, ci->ren1_other.path, &mfi_c1) ||
+ merge_file_special_markers(o, b, &ci->ren2_other, c2,
+ o->branch1, ci->ren2_other.path,
+ o->branch2, c2->path, &mfi_c2))
+ return;
if (o->call_depth) {
/*
@@ -1464,12 +1468,13 @@ static int process_renames(struct merge_options *o,
ren1_dst, branch2);
if (o->call_depth) {
struct merge_file_info mfi;
- mfi = merge_file_one(o, ren1_dst, &null_oid, 0,
- &ren1->pair->two->oid,
- ren1->pair->two->mode,
- &dst_other.oid,
- dst_other.mode,
- branch1, branch2);
+ if (merge_file_one(o, ren1_dst, &null_oid, 0,
+ &ren1->pair->two->oid,
+ ren1->pair->two->mode,
+ &dst_other.oid,
+ dst_other.mode,
+ branch1, branch2, &mfi))
+ return -1;
output(o, 1, _("Adding merged %s"), ren1_dst);
update_file(o, 0, &mfi.oid,
mfi.mode, ren1_dst);
@@ -1627,9 +1632,10 @@ static int merge_content(struct merge_options *o,
if (dir_in_way(path, !o->call_depth))
df_conflict_remains = 1;
}
- mfi = merge_file_special_markers(o, &one, &a, &b,
- o->branch1, path1,
- o->branch2, path2);
+ if (merge_file_special_markers(o, &one, &a, &b,
+ o->branch1, path1,
+ o->branch2, path2, &mfi))
+ return -1;
if (mfi.clean && !df_conflict_remains &&
oid_eq(&mfi.oid, a_oid) && mfi.mode == a_mode) {
--
2.9.0.281.g286a8d9
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html