On Thu, 27 Jun 2019 at 17:22, Yousong Zhou <yszhou4tech@xxxxxxxxx> wrote:
>
> The following commands manifests the problem. In old versions before
> commit 4762ae9d60 ("column: use libsmartcols for --table"), both of them
> should output with 2 "|"
>
> echo '||' | column -o '|' -s '|' -t
> echo '|| ' | column -o '|' -s '|' -t
>
> Fixes: 4762ae9d60 ("column: use libsmartcols for --table")
> Signed-off-by: Yousong Zhou <zhouyousong@xxxxxxxxxxxxx>
> ---
Hi, do you think this is a real bug and the fix a proper one? should
I post a pull request through the github project page?
Regards,
yousong
> tests/expected/column/table-empty-column-at-eol | 1 +
> tests/expected/column/table-empty-column-at-eol2 | 1 +
> tests/ts/column/table | 8 ++++++++
> text-utils/column.c | 15 ++++++++++-----
> 4 files changed, 20 insertions(+), 5 deletions(-)
> create mode 100644 tests/expected/column/table-empty-column-at-eol
> create mode 100644 tests/expected/column/table-empty-column-at-eol2
>
> diff --git a/tests/expected/column/table-empty-column-at-eol b/tests/expected/column/table-empty-column-at-eol
> new file mode 100644
> index 000000000..948cf947f
> --- /dev/null
> +++ b/tests/expected/column/table-empty-column-at-eol
> @@ -0,0 +1 @@
> +|
> diff --git a/tests/expected/column/table-empty-column-at-eol2 b/tests/expected/column/table-empty-column-at-eol2
> new file mode 100644
> index 000000000..7c4378506
> --- /dev/null
> +++ b/tests/expected/column/table-empty-column-at-eol2
> @@ -0,0 +1 @@
> +||
> diff --git a/tests/ts/column/table b/tests/ts/column/table
> index bd1f16f3f..e64dee746 100755
> --- a/tests/ts/column/table
> +++ b/tests/ts/column/table
> @@ -116,4 +116,12 @@ ts_init_subtest "empty-column"
> printf ':a:b\n' | $TS_CMD_COLUMN --table --separator ':' --output-separator ':' >> $TS_OUTPUT 2>&1
> ts_finalize_subtest
>
> +ts_init_subtest "empty-column-at-eol"
> +printf '|' | $TS_CMD_COLUMN --separator '|' --output-separator '|' --table >> $TS_OUTPUT 2>&1
> +ts_finalize_subtest
> +
> +ts_init_subtest "empty-column-at-eol2"
> +printf '||' | $TS_CMD_COLUMN --separator '|' --output-separator '|' --table >> $TS_OUTPUT 2>&1
> +ts_finalize_subtest
> +
> ts_finalize
> diff --git a/text-utils/column.c b/text-utils/column.c
> index 13b39537e..64f1cf7e9 100644
> --- a/text-utils/column.c
> +++ b/text-utils/column.c
> @@ -169,8 +169,9 @@ static wchar_t *local_wcstok(wchar_t *p, const wchar_t *separator, int greedy, w
> return strtok_r(p, separator, state);
> #endif
> if (!p) {
> - if (!*state || !**state)
> + if (!*state) {
> return NULL;
> + }
> p = *state;
> }
> result = p;
> @@ -435,7 +436,7 @@ static int add_line_to_table(struct column_control *ctl, wchar_t *wcs)
> if (!ctl->tab)
> init_table(ctl);
>
> - while ((wcdata = local_wcstok(wcs, ctl->input_separator, ctl->greedy, &sv))) {
> + while ((wcdata = local_wcstok(wcs, ctl->input_separator, ctl->greedy, &sv)) || sv) {
> char *data;
>
> if (scols_table_get_ncols(ctl->tab) < n + 1) {
> @@ -452,9 +453,13 @@ static int add_line_to_table(struct column_control *ctl, wchar_t *wcs)
> err(EXIT_FAILURE, _("failed to allocate output line"));
> }
>
> - data = wcs_to_mbs(wcdata);
> - if (!data)
> - err(EXIT_FAILURE, _("failed to allocate output data"));
> + if (wcdata) {
> + data = wcs_to_mbs(wcdata);
> + if (!data)
> + err(EXIT_FAILURE, _("failed to allocate output data"));
> + } else {
> + data = NULL;
> + }
> if (scols_line_refer_data(ln, n, data))
> err(EXIT_FAILURE, _("failed to add output data"));
> n++;
