diff options
| -rw-r--r-- | libgnu/argp-parse.c | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/libgnu/argp-parse.c b/libgnu/argp-parse.c index 3f723bc8..dc3106e7 100644 --- a/libgnu/argp-parse.c +++ b/libgnu/argp-parse.c @@ -740,12 +740,15 @@ parser_parse_opt (struct parser *parser, int opt, char *val) } } else - /* A long option. We use shifts instead of masking for extracting - the user value in order to preserve the sign. */ - err = - group_parse (&parser->groups[group_key - 1], &parser->state, - (opt << GROUP_BITS) >> GROUP_BITS, - parser->opt_data.optarg); + { + uint maskable = (uint)(opt < 0 ? -opt : opt); + maskable = (maskable << GROUP_BITS) >> GROUP_BITS; + int masked = opt < 0 ? -(int)maskable : (int)maskable; + + err = + group_parse (&parser->groups[group_key - 1], &parser->state, + masked, parser->opt_data.optarg); + } if (err == EBADKEY) /* At least currently, an option not recognized is an error in the |