Subject: [PATCH v2 5/7] parse-options: add precision handling for OPTION_NEGBIT

From: René Scharfe <[email-masked]>
Date: Wed, 9 Jul 2025 11:45:53 +0200

Similar to 09705696f7 (parse-options: introduce precision handling for
`OPTION_INTEGER`, 2025-04-17) support value variables of different sizes
for OPTION_NEGBIT.  Do that by requiring their "precision" to be set,
casting their "value" pointer accordingly and checking whether the value
fits.

Signed-off-by: René Scharfe <[email-masked]>
---
 builtin/rebase.c |  1 +
 parse-options.c  | 11 +++++++----
 parse-options.h  |  1 +
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/builtin/rebase.c b/builtin/rebase.c
index 2e8c4ee678..e90562a3b8 100644
--- a/builtin/rebase.c
+++ b/builtin/rebase.c
@@ -1128,6 +1128,7 @@ int cmd_rebase(int argc,
 			.short_name = 'n',
 			.long_name = "no-stat",
 			.value = &options.flags,
+			.precision = sizeof(options.flags),
 			.help = N_("do not show diffstat of what changed upstream"),
 			.flags = PARSE_OPT_NOARG,
 			.defval = REBASE_DIFFSTAT,
diff --git a/parse-options.c b/parse-options.c
index b5c877d5e1..ba89dc4d09 100644
--- a/parse-options.c
+++ b/parse-options.c
@@ -157,11 +157,14 @@ static enum parse_opt_result do_get_value(struct parse_opt_ctx_t *p,
 	}
 
 	case OPTION_NEGBIT:
+	{
+		intmax_t value = get_int_value(opt, flags);
 		if (unset)
-			*(int *)opt->value |= opt->defval;
+			value |= opt->defval;
 		else
-			*(int *)opt->value &= ~opt->defval;
-		return 0;
+			value &= ~opt->defval;
+		return set_int_value(opt, flags, value);
+	}
 
 	case OPTION_BITOP:
 		if (unset)
@@ -643,11 +646,11 @@ static void parse_options_check(const struct option *opts)
 		switch (opts->type) {
 		case OPTION_SET_INT:
 		case OPTION_BIT:
+		case OPTION_NEGBIT:
 			if (!signed_int_fits(opts->defval, opts->precision))
 				optbug(opts, "has invalid defval");
 			/* fallthru */
 		case OPTION_COUNTUP:
-		case OPTION_NEGBIT:
 		case OPTION_NUMBER:
 		case OPTION_BITOP:
 			if ((opts->flags & PARSE_OPT_OPTARG) ||
diff --git a/parse-options.h b/parse-options.h
index 6501ca3c27..076f88b384 100644
--- a/parse-options.h
+++ b/parse-options.h
@@ -250,6 +250,7 @@ struct option {
 	.short_name = (s), \
 	.long_name = (l), \
 	.value = (v), \
+	.precision = sizeof(*v), \
 	.help = (h), \
 	.flags = PARSE_OPT_NOARG, \
 	.defval = (b), \
-- 
2.50.0