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merge-file: refactor for subsequent memory leak fix

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Refactor the code in builtin/merge-file.c to:

 * Use the initializer to zero out "mmfs", and use modern C syntax for
   the rest.

 * Refactor the the inner loop to use a variable and "if/else if"
   pattern followed by "return". This will make a change to change it to
   a "goto cleanup" pattern smaller.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2022-07-01 12:42:55 +02:00 committed by Junio C Hamano
parent d90dafbe31
commit 480a0e30a7
1 changed files with 14 additions and 12 deletions
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26
builtin/merge-file.c
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@ -25,10 +25,10 @@ static int label_cb(const struct option *opt, const char *arg, int unset)
int cmd_merge_file(int argc, const char **argv, const char *prefix)
{
const char *names[3] = { NULL, NULL, NULL };
mmfile_t mmfs[3];
mmbuffer_t result = {NULL, 0};
xmparam_t xmp = {{0}};
const char *names[3] = { 0 };
mmfile_t mmfs[3] = { 0 };
mmbuffer_t result = { 0 };
xmparam_t xmp = { 0 };
int ret = 0, i = 0, to_stdout = 0;
int quiet = 0;
struct option options[] = {
@ -71,21 +71,23 @@ int cmd_merge_file(int argc, const char **argv, const char *prefix)
for (i = 0; i < 3; i++) {
char *fname;
int ret;
mmfile_t *mmf = mmfs + i;
if (!names[i])
names[i] = argv[i];
fname = prefix_filename(prefix, argv[i]);
ret = read_mmfile(mmfs + i, fname);
if (read_mmfile(mmf, fname))
ret = -1;
else if (mmf->size > MAX_XDIFF_SIZE ||
buffer_is_binary(mmf->ptr, mmf->size))
ret = error("Cannot merge binary files: %s",
argv[i]);
free(fname);
if (ret)
return -1;
if (mmfs[i].size > MAX_XDIFF_SIZE ||
buffer_is_binary(mmfs[i].ptr, mmfs[i].size))
return error("Cannot merge binary files: %s",
argv[i]);
return ret;
}
xmp.ancestor = names[1];