trailer: use offsets for trailer_start/trailer_end
Previously these fields in the trailer_info struct were of type "const
char *" and pointed to positions in the input string directly (to the
start and end positions of the trailer block).
Use offsets to make the intended usage less ambiguous. We only need to
reference the input string in format_trailer_info(), so update that
function to take a pointer to the input.
While we're at it, rename trailer_start to trailer_block_start to be
more explicit about these offsets (that they are for the entire trailer
block including other trailers). Ditto for trailer_end.
Reported-by: Glen Choo <glencbz@gmail.com>
Signed-off-by: Linus Arver <linusa@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/sequencer.c b/sequencer.c
index d584cac..8707a92 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -345,7 +345,7 @@
if (ignore_footer)
sb->buf[sb->len - ignore_footer] = saved_char;
- if (info.trailer_start == info.trailer_end)
+ if (info.trailer_block_start == info.trailer_block_end)
return 0;
for (i = 0; i < info.trailer_nr; i++)
diff --git a/trailer.c b/trailer.c
index ca426c4..816f8b2 100644
--- a/trailer.c
+++ b/trailer.c
@@ -858,7 +858,7 @@
* Return the position of the first trailer line or len if there are no
* trailers.
*/
-static size_t find_trailer_start(const char *buf, size_t len)
+static size_t find_trailer_block_start(const char *buf, size_t len)
{
const char *s;
ssize_t end_of_title, l;
@@ -1074,7 +1074,6 @@
LIST_HEAD(head);
struct strbuf sb = STRBUF_INIT;
struct trailer_info info;
- size_t trailer_end;
FILE *outfile = stdout;
ensure_configured();
@@ -1085,11 +1084,10 @@
outfile = create_in_place_tempfile(file);
parse_trailers(&info, sb.buf, &head, opts);
- trailer_end = info.trailer_end - sb.buf;
/* Print the lines before the trailers */
if (!opts->only_trailers)
- fwrite(sb.buf, 1, info.trailer_start - sb.buf, outfile);
+ fwrite(sb.buf, 1, info.trailer_block_start, outfile);
if (!opts->only_trailers && !info.blank_line_before_trailer)
fprintf(outfile, "\n");
@@ -1111,7 +1109,7 @@
/* Print the lines after the trailers as is */
if (!opts->only_trailers)
- fwrite(sb.buf + trailer_end, 1, sb.len - trailer_end, outfile);
+ fwrite(sb.buf + info.trailer_block_end, 1, sb.len - info.trailer_block_end, outfile);
if (opts->in_place)
if (rename_tempfile(&trailers_tempfile, file))
@@ -1123,7 +1121,7 @@
void trailer_info_get(struct trailer_info *info, const char *str,
const struct process_trailer_options *opts)
{
- int end_of_log_message, trailer_start;
+ size_t end_of_log_message = 0, trailer_block_start = 0;
struct strbuf **trailer_lines, **ptr;
char **trailer_strings = NULL;
size_t nr = 0, alloc = 0;
@@ -1132,10 +1130,10 @@
ensure_configured();
end_of_log_message = find_end_of_log_message(str, opts->no_divider);
- trailer_start = find_trailer_start(str, end_of_log_message);
+ trailer_block_start = find_trailer_block_start(str, end_of_log_message);
- trailer_lines = strbuf_split_buf(str + trailer_start,
- end_of_log_message - trailer_start,
+ trailer_lines = strbuf_split_buf(str + trailer_block_start,
+ end_of_log_message - trailer_block_start,
'\n',
0);
for (ptr = trailer_lines; *ptr; ptr++) {
@@ -1156,9 +1154,9 @@
strbuf_list_free(trailer_lines);
info->blank_line_before_trailer = ends_with_blank_line(str,
- trailer_start);
- info->trailer_start = str + trailer_start;
- info->trailer_end = str + end_of_log_message;
+ trailer_block_start);
+ info->trailer_block_start = trailer_block_start;
+ info->trailer_block_end = end_of_log_message;
info->trailers = trailer_strings;
info->trailer_nr = nr;
}
@@ -1173,6 +1171,7 @@
static void format_trailer_info(struct strbuf *out,
const struct trailer_info *info,
+ const char *msg,
const struct process_trailer_options *opts)
{
size_t origlen = out->len;
@@ -1182,8 +1181,8 @@
if (!opts->only_trailers && !opts->unfold && !opts->filter &&
!opts->separator && !opts->key_only && !opts->value_only &&
!opts->key_value_separator) {
- strbuf_add(out, info->trailer_start,
- info->trailer_end - info->trailer_start);
+ strbuf_add(out, msg + info->trailer_block_start,
+ info->trailer_block_end - info->trailer_block_start);
return;
}
@@ -1237,7 +1236,7 @@
struct trailer_info info;
trailer_info_get(&info, msg, opts);
- format_trailer_info(out, &info, opts);
+ format_trailer_info(out, &info, msg, opts);
trailer_info_release(&info);
}
diff --git a/trailer.h b/trailer.h
index ab2cd01..1644cd0 100644
--- a/trailer.h
+++ b/trailer.h
@@ -32,16 +32,16 @@
struct trailer_info {
/*
* True if there is a blank line before the location pointed to by
- * trailer_start.
+ * trailer_block_start.
*/
int blank_line_before_trailer;
/*
- * Pointers to the start and end of the trailer block found. If there
- * is no trailer block found, these 2 pointers point to the end of the
- * input string.
+ * Offsets to the trailer block start and end positions in the input
+ * string. If no trailer block is found, these are both set to the
+ * "true" end of the input (find_end_of_log_message()).
*/
- const char *trailer_start, *trailer_end;
+ size_t trailer_block_start, trailer_block_end;
/*
* Array of trailers found.
