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trailer: make parse_trailers() return trailer_info pointer 

This is the second and final preparatory commit for making the
trailer_info struct private to the trailer implementation.

Make trailer_info_get() do the actual work of allocating a new
trailer_info struct, and return a pointer to it. Because
parse_trailers() wraps around trailer_info_get(), it too can return this
pointer to the caller. From the trailer API user's perspective, the call
to trailer_info_new() can be replaced with parse_trailers(); do so in
interpret-trailers.

Because trailer_info_new() is no longer called by interpret-trailers,
remove this function from the trailer API.

With this change, we no longer allocate trailer_info on the stack ---
all uses of it are via a pointer where the actual data is always
allocated at runtime through trailer_info_new(). Make
trailer_info_release() free this dynamically allocated memory.

Finally, due to the way the function signatures of parse_trailers() and
trailer_info_get() have changed, update the callsites in
format_trailers_from_commit() and trailer_iterator_init() accordingly.

Helped-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Linus Arver <linusa@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Linus Arver 2024-04-19 05:22:31 +00:00 committed by Junio C Hamano
parent 139c7eb04e
commit b6b12ef238
3 changed files with 30 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
builtin/interpret-trailers.c
View File

@ -141,7 +141,7 @@ static void interpret_trailers(const struct process_trailer_options *opts,
LIST_HEAD(head);
struct strbuf sb = STRBUF_INIT;
struct strbuf trailer_block = STRBUF_INIT;
struct trailer_info *info = trailer_info_new();
struct trailer_info *info;
FILE *outfile = stdout;
trailer_config_init();
@ -151,7 +151,7 @@ static void interpret_trailers(const struct process_trailer_options *opts,
if (opts->in_place)
outfile = create_in_place_tempfile(file);
parse_trailers(opts, info, sb.buf, &head);
info = parse_trailers(opts, sb.buf, &head);
/* Print the lines before the trailers */
if (!opts->only_trailers)

41
trailer.c
View File

@ -952,7 +952,7 @@ static void unfold_value(struct strbuf *val)
strbuf_release(&out);
}
struct trailer_info *trailer_info_new(void)
static struct trailer_info *trailer_info_new(void)
{
struct trailer_info *info = xcalloc(1, sizeof(*info));
return info;
@ -962,16 +962,16 @@ struct trailer_info *trailer_info_new(void)
* Parse trailers in "str", populating the trailer info and "head"
* linked list structure.
*/
void parse_trailers(const struct process_trailer_options *opts,
struct trailer_info *info,
const char *str,
struct list_head *head)
struct trailer_info *parse_trailers(const struct process_trailer_options *opts,
const char *str,
struct list_head *head)
{
struct trailer_info *info;
struct strbuf tok = STRBUF_INIT;
struct strbuf val = STRBUF_INIT;
size_t i;
trailer_info_get(opts, str, info);
info = trailer_info_get(opts, str);
for (i = 0; i < info->trailer_nr; i++) {
int separator_pos;
@ -995,6 +995,8 @@ void parse_trailers(const struct process_trailer_options *opts,
strbuf_detach(&val, NULL));
}
}
return info;
}
void free_trailers(struct list_head *trailers)
@ -1021,10 +1023,10 @@ int blank_line_before_trailer_block(struct trailer_info *info)
return info->blank_line_before_trailer;
}
void trailer_info_get(const struct process_trailer_options *opts,
const char *str,
struct trailer_info *info)
struct trailer_info *trailer_info_get(const struct process_trailer_options *opts,
const char *str)
{
struct trailer_info *info = trailer_info_new();
size_t end_of_log_message = 0, trailer_block_start = 0;
struct strbuf **trailer_lines, **ptr;
char **trailer_strings = NULL;
@ -1063,6 +1065,8 @@ void trailer_info_get(const struct process_trailer_options *opts,
info->trailer_block_end = end_of_log_message;
info->trailers = trailer_strings;
info->trailer_nr = nr;
return info;
}
void trailer_info_release(struct trailer_info *info)
@ -1071,6 +1075,7 @@ void trailer_info_release(struct trailer_info *info)
for (i = 0; i < info->trailer_nr; i++)
free(info->trailers[i]);
free(info->trailers);
free(info);
}
void format_trailers(const struct process_trailer_options *opts,
@ -1138,21 +1143,19 @@ void format_trailers_from_commit(const struct process_trailer_options *opts,
struct strbuf *out)
{
LIST_HEAD(trailer_objects);
struct trailer_info info;
parse_trailers(opts, &info, msg, &trailer_objects);
struct trailer_info *info = parse_trailers(opts, msg, &trailer_objects);
/* If we want the whole block untouched, we can take the fast path. */
if (!opts->only_trailers && !opts->unfold && !opts->filter &&
!opts->separator && !opts->key_only && !opts->value_only &&
!opts->key_value_separator) {
strbuf_add(out, msg + info.trailer_block_start,
info.trailer_block_end - info.trailer_block_start);
strbuf_add(out, msg + info->trailer_block_start,
info->trailer_block_end - info->trailer_block_start);
} else
format_trailers(opts, &trailer_objects, out);
free_trailers(&trailer_objects);
trailer_info_release(&info);
trailer_info_release(info);
}
void trailer_iterator_init(struct trailer_iterator *iter, const char *msg)
@ -1161,14 +1164,14 @@ void trailer_iterator_init(struct trailer_iterator *iter, const char *msg)
strbuf_init(&iter->key, 0);
strbuf_init(&iter->val, 0);
opts.no_divider = 1;
trailer_info_get(&opts, msg, &iter->internal.info);
iter->internal.info = trailer_info_get(&opts, msg);
iter->internal.cur = 0;
}
int trailer_iterator_advance(struct trailer_iterator *iter)
{
if (iter->internal.cur < iter->internal.info.trailer_nr) {
char *line = iter->internal.info.trailers[iter->internal.cur++];
if (iter->internal.cur < iter->internal.info->trailer_nr) {
char *line = iter->internal.info->trailers[iter->internal.cur++];
int separator_pos = find_separator(line, separators);
iter->raw = line;
@ -1185,7 +1188,7 @@ int trailer_iterator_advance(struct trailer_iterator *iter)
void trailer_iterator_release(struct trailer_iterator *iter)
{
trailer_info_release(&iter->internal.info);
trailer_info_release(iter->internal.info);
strbuf_release(&iter->val);
strbuf_release(&iter->key);
}

15
trailer.h
View File

@ -89,18 +89,15 @@ void parse_trailers_from_command_line_args(struct list_head *arg_head,
void process_trailers_lists(struct list_head *head,
struct list_head *arg_head);
void parse_trailers(const struct process_trailer_options *,
struct trailer_info *,
const char *str,
struct list_head *head);
struct trailer_info *parse_trailers(const struct process_trailer_options *,
const char *str,
struct list_head *head);
struct trailer_info *trailer_info_get(const struct process_trailer_options *,
const char *str);
void trailer_info_get(const struct process_trailer_options *,
const char *str,
struct trailer_info *);
size_t trailer_block_start(struct trailer_info *);
size_t trailer_block_end(struct trailer_info *);
int blank_line_before_trailer_block(struct trailer_info *);
struct trailer_info *trailer_info_new(void);
void trailer_info_release(struct trailer_info *info);
@ -142,7 +139,7 @@ struct trailer_iterator {
/* private */
struct {
struct trailer_info info;
struct trailer_info *info;
size_t cur;
} internal;
};