Avoid the overhead of setting up a dictionary and passing it via
strbuf_expand() to strbuf_expand_dict_cb() by using strbuf_expand_step()
in a loop instead. It requires explicit handling of %% and unrecognized
placeholders, but is more direct and simpler overall, and expands only
on demand.
Signed-off-by: René Scharfe <l.s.r@xxxxxx>
---
convert.c | 22 ++++++++++------------
ll-merge.c | 32 ++++++++++++++++++--------------
strbuf.c | 16 ----------------
strbuf.h | 14 --------------
4 files changed, 28 insertions(+), 56 deletions(-)
diff --git a/convert.c b/convert.c
index 9ee79fe469..455d05cf6b 100644
--- a/convert.c
+++ b/convert.c
@@ -633,23 +633,21 @@ static int filter_buffer_or_fd(int in UNUSED, int out, void *data)
*/
struct child_process child_process = CHILD_PROCESS_INIT;
struct filter_params *params = (struct filter_params *)data;
+ const char *format = params->cmd;
int write_err, status;
/* apply % substitution to cmd */
struct strbuf cmd = STRBUF_INIT;
- struct strbuf path = STRBUF_INIT;
- struct strbuf_expand_dict_entry dict[] = {
- { "f", NULL, },
- { NULL, NULL, },
- };
-
- /* quote the path to preserve spaces, etc. */
- sq_quote_buf(&path, params->path);
- dict[0].value = path.buf;
- /* expand all %f with the quoted path */
- strbuf_expand(&cmd, params->cmd, strbuf_expand_dict_cb, &dict);
- strbuf_release(&path);
+ /* expand all %f with the quoted path; quote to preserve space, etc. */
+ while (strbuf_expand_step(&cmd, &format)) {
+ if (skip_prefix(format, "%", &format))
+ strbuf_addch(&cmd, '%');
+ else if (skip_prefix(format, "f", &format))
+ sq_quote_buf(&cmd, params->path);
+ else
+ strbuf_addch(&cmd, '%');
+ }
strvec_push(&child_process.args, cmd.buf);
child_process.use_shell = 1;
diff --git a/ll-merge.c b/ll-merge.c
index 07ec16e8e5..b307ad293c 100644
--- a/ll-merge.c
+++ b/ll-merge.c
@@ -192,24 +192,15 @@ static enum ll_merge_result ll_ext_merge(const struct ll_merge_driver *fn,
const struct ll_merge_options *opts,
int marker_size)
{
- char temp[4][50];
+ char temp[3][50];
struct strbuf cmd = STRBUF_INIT;
- struct strbuf_expand_dict_entry dict[6];
- struct strbuf path_sq = STRBUF_INIT;
+ const char *format = fn->cmdline;
struct child_process child = CHILD_PROCESS_INIT;
int status, fd, i;
struct stat st;
enum ll_merge_result ret;
assert(opts);
- sq_quote_buf(&path_sq, path);
- dict[0].placeholder = "O"; dict[0].value = temp[0];
- dict[1].placeholder = "A"; dict[1].value = temp[1];
- dict[2].placeholder = "B"; dict[2].value = temp[2];
- dict[3].placeholder = "L"; dict[3].value = temp[3];
- dict[4].placeholder = "P"; dict[4].value = path_sq.buf;
- dict[5].placeholder = NULL; dict[5].value = NULL;
-
if (!fn->cmdline)
die("custom merge driver %s lacks command line.", fn->name);
@@ -218,9 +209,23 @@ static enum ll_merge_result ll_ext_merge(const struct ll_merge_driver *fn,
create_temp(orig, temp[0], sizeof(temp[0]));
create_temp(src1, temp[1], sizeof(temp[1]));
create_temp(src2, temp[2], sizeof(temp[2]));
- xsnprintf(temp[3], sizeof(temp[3]), "%d", marker_size);
- strbuf_expand(&cmd, fn->cmdline, strbuf_expand_dict_cb, &dict);
+ while (strbuf_expand_step(&cmd, &format)) {
+ if (skip_prefix(format, "%", &format))
+ strbuf_addch(&cmd, '%');
+ else if (skip_prefix(format, "O", &format))
+ strbuf_addstr(&cmd, temp[0]);
+ else if (skip_prefix(format, "A", &format))
+ strbuf_addstr(&cmd, temp[1]);
+ else if (skip_prefix(format, "B", &format))
+ strbuf_addstr(&cmd, temp[2]);
+ else if (skip_prefix(format, "L", &format))
+ strbuf_addf(&cmd, "%d", marker_size);
+ else if (skip_prefix(format, "P", &format))
+ sq_quote_buf(&cmd, path);
+ else
+ strbuf_addch(&cmd, '%');
+ }
child.use_shell = 1;
strvec_push(&child.args, cmd.buf);
@@ -242,7 +247,6 @@ static enum ll_merge_result ll_ext_merge(const struct ll_merge_driver *fn,
for (i = 0; i < 3; i++)
unlink_or_warn(temp[i]);
strbuf_release(&cmd);
- strbuf_release(&path_sq);
ret = (status > 0) ? LL_MERGE_CONFLICT : status;
return ret;
}
diff --git a/strbuf.c b/strbuf.c
index a90b597da1..972366b410 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -468,22 +468,6 @@ size_t strbuf_expand_literal_cb(struct strbuf *sb,
return 0;
}
-size_t strbuf_expand_dict_cb(struct strbuf *sb, const char *placeholder,
- void *context)
-{
- struct strbuf_expand_dict_entry *e = context;
- size_t len;
-
- for (; e->placeholder && (len = strlen(e->placeholder)); e++) {
- if (!strncmp(placeholder, e->placeholder, len)) {
- if (e->value)
- strbuf_addstr(sb, e->value);
- return len;
- }
- }
- return 0;
-}
-
void strbuf_addbuf_percentquote(struct strbuf *dst, const struct strbuf *src)
{
size_t i, len = src->len;
diff --git a/strbuf.h b/strbuf.h
index a189f12b84..e293117f07 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -357,20 +357,6 @@ size_t strbuf_expand_literal_cb(struct strbuf *sb,
const char *placeholder,
void *context);
-/**
- * Used as callback for `strbuf_expand()`, expects an array of
- * struct strbuf_expand_dict_entry as context, i.e. pairs of
- * placeholder and replacement string. The array needs to be
- * terminated by an entry with placeholder set to NULL.
- */
-struct strbuf_expand_dict_entry {
- const char *placeholder;
- const char *value;
-};
-size_t strbuf_expand_dict_cb(struct strbuf *sb,
- const char *placeholder,
- void *context);
-
/**
* If the string pointed to by `formatp` contains a percent sign ("%"),
* advance it to point to the character following the next one and
--
2.41.0
