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 | 93 ++++++++++++++++++++++++++++++-------------------------
1 file changed, 50 insertions(+), 43 deletions(-)
diff --git a/merge-recursive.c b/merge-recursive.c
index 716488b..3e3667f 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -886,47 +886,47 @@ 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;
- hashcpy(result.sha, a->sha1);
+ result->mode = a->mode;
+ hashcpy(result->sha, a->sha1);
} else {
- result.mode = b->mode;
- hashcpy(result.sha, b->sha1);
+ result->mode = b->mode;
+ hashcpy(result->sha, b->sha1);
}
} else {
if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1))
- 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 (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1))
- hashcpy(result.sha, b->sha1);
+ hashcpy(result->sha, b->sha1);
else if (sha_eq(b->sha1, one->sha1))
- hashcpy(result.sha, a->sha1);
+ hashcpy(result->sha, a->sha1);
else if (S_ISREG(a->mode)) {
mmbuffer_t result_buf;
int merge_status;
@@ -938,62 +938,63 @@ 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.sha))
+ blob_type, result->sha))
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.sha,
+ result->clean = merge_submodule(result->sha,
one->path, one->sha1,
a->sha1, b->sha1,
!o->call_depth);
} else if (S_ISLNK(a->mode)) {
- hashcpy(result.sha, a->sha1);
+ hashcpy(result->sha, a->sha1);
if (!sha_eq(a->sha1, b->sha1))
- 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 unsigned char *o_sha, int o_mode,
const unsigned char *a_sha, int a_mode,
const unsigned char *b_sha, int b_mode,
const char *branch1,
- const char *branch2)
+ const char *branch2,
+ struct merge_file_info *mfi)
{
struct diff_filespec one, a, b;
@@ -1004,7 +1005,7 @@ static struct merge_file_info merge_file_one(struct merge_options *o,
a.mode = a_mode;
hashcpy(b.sha1, b_sha);
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,
@@ -1177,11 +1178,14 @@ 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->sha1, one->mode,
a->sha1, a->mode,
b->sha1, 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
@@ -1235,12 +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,
+ if (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->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);
+ o->branch2, c2->path, &mfi_c2))
+ return;
if (o->call_depth) {
/*
@@ -1461,10 +1466,11 @@ 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_sha1, 0,
+ if (merge_file_one(o, ren1_dst, null_sha1, 0,
ren1->pair->two->sha1, ren1->pair->two->mode,
dst_other.sha1, dst_other.mode,
- branch1, branch2);
+ branch1, branch2, &mfi))
+ return -1;
output(o, 1, _("Adding merged %s"), ren1_dst);
update_file(o, 0, mfi.sha, mfi.mode, ren1_dst);
try_merge = 0;
@@ -1620,9 +1626,10 @@ 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,
+ if (merge_file_special_markers(o, &one, &a, &b,
o->branch1, path1,
- o->branch2, path2);
+ o->branch2, path2, &mfi))
+ return -1;
if (mfi.clean && !df_conflict_remains &&
sha_eq(mfi.sha, a_sha) && mfi.mode == a_mode) {
--
2.9.0.280.g32e2a70
--
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