Pretty sure the 10 here is just a magic number representing no
associated short option for --format. The val field in struct option
is ignored when it is not also given in the short options passed to
the getopt_long function call.
-- 8< --
* src/ptx.c (FORMAT_OPTION): New constant.
(long_options): Use FORMAT_OPTION instead of 10.
(main): Likewise.
---
src/ptx.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/src/ptx.c b/src/ptx.c
index 2d548530d..20f61afa3 100644
--- a/src/ptx.c
+++ b/src/ptx.c
@@ -1721,6 +1721,13 @@ Output a permuted index, including context, of the words
in the input files.\n\
| strings, then launch execution. |
`----------------------------------------------------------------------*/
+/* For long options that have no equivalent short option, use a
+ non-character as a pseudo short option, starting with CHAR_MAX + 1. */
+enum
+{
+ FORMAT_OPTION = CHAR_MAX + 1
+};
+
/* Long options equivalences. */
static struct option const long_options[] =
{
@@ -1734,7 +1741,7 @@ static struct option const long_options[] =
{"only-file", required_argument, nullptr, 'o'},
{"references", no_argument, nullptr, 'r'},
{"right-side-refs", no_argument, nullptr, 'R'},
- {"format", required_argument, nullptr, 10},
+ {"format", required_argument, nullptr, FORMAT_OPTION},
{"sentence-regexp", required_argument, nullptr, 'S'},
{"traditional", no_argument, nullptr, 'G'},
{"typeset-mode", no_argument, nullptr, 't'},
@@ -1868,7 +1875,7 @@ main (int argc, char **argv)
word_regex.string = nullptr;
break;
- case 10:
+ case FORMAT_OPTION:
output_format = XARGMATCH ("--format", optarg,
format_args, format_vals);
break;
--
2.52.0
