diff: remove DIFF_OPT_CLR macro

Remove the `DIFF_OPT_CLR` macro and instead set the flags directly.
This conversion is done using the following semantic patch:

	@@
	expression E;
	identifier fld;
	@@
	- DIFF_OPT_CLR(&E, fld)
	+ E.flags.fld = 0

	@@
	type T;
	T *ptr;
	identifier fld;
	@@
	- DIFF_OPT_CLR(ptr, fld)
	+ ptr->flags.fld = 0

Signed-off-by: Brandon Williams <bmwill@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/blame.c

@@ -736,7 +736,7 @@ int cmd_blame(int argc, const char **argv, const char *prefix)
 parse_done:
 	no_whole_file_rename = !revs.diffopt.flags.FOLLOW_RENAMES;
 	xdl_opts |= revs.diffopt.xdl_opts & XDF_INDENT_HEURISTIC;
-	DIFF_OPT_CLR(&revs.diffopt, FOLLOW_RENAMES);
+	revs.diffopt.flags.FOLLOW_RENAMES = 0;
 	argc = parse_options_end(&ctx);
 
 	if (incremental || (output_option & OUTPUT_PORCELAIN)) {

combine-diff.c

@@ -1414,7 +1414,7 @@ void diff_tree_combined(const struct object_id *oid,
 	diffopts = *opt;
 	copy_pathspec(&diffopts.pathspec, &opt->pathspec);
 	diffopts.flags.RECURSIVE = 1;
-	DIFF_OPT_CLR(&diffopts, ALLOW_EXTERNAL);
+	diffopts.flags.ALLOW_EXTERNAL = 0;
 
 	/* find set of paths that everybody touches
 	 *

diff.c

@@ -124,16 +124,16 @@ static int parse_dirstat_params(struct diff_options *options, const char *params
 	for (i = 0; i < params.nr; i++) {
 		const char *p = params.items[i].string;
 		if (!strcmp(p, "changes")) {
-			DIFF_OPT_CLR(options, DIRSTAT_BY_LINE);
-			DIFF_OPT_CLR(options, DIRSTAT_BY_FILE);
+			options->flags.DIRSTAT_BY_LINE = 0;
+			options->flags.DIRSTAT_BY_FILE = 0;
 		} else if (!strcmp(p, "lines")) {
 			options->flags.DIRSTAT_BY_LINE = 1;
-			DIFF_OPT_CLR(options, DIRSTAT_BY_FILE);
+			options->flags.DIRSTAT_BY_FILE = 0;
 		} else if (!strcmp(p, "files")) {
-			DIFF_OPT_CLR(options, DIRSTAT_BY_LINE);
+			options->flags.DIRSTAT_BY_LINE = 0;
 			options->flags.DIRSTAT_BY_FILE = 1;
 		} else if (!strcmp(p, "noncumulative")) {
-			DIFF_OPT_CLR(options, DIRSTAT_CUMULATIVE);
+			options->flags.DIRSTAT_CUMULATIVE = 0;
 		} else if (!strcmp(p, "cumulative")) {
 			options->flags.DIRSTAT_CUMULATIVE = 1;
 		} else if (isdigit(*p)) {
@@ -4205,7 +4205,7 @@ void diff_setup_done(struct diff_options *options)
 	    DIFF_XDL_TST(options, IGNORE_WHITESPACE_AT_EOL))
 		options->flags.DIFF_FROM_CONTENTS = 1;
 	else
-		DIFF_OPT_CLR(options, DIFF_FROM_CONTENTS);
+		options->flags.DIFF_FROM_CONTENTS = 0;
 
 	if (options->flags.FIND_COPIES_HARDER)
 		options->detect_rename = DIFF_DETECT_COPY;
@@ -4640,7 +4640,7 @@ int diff_opt_parse(struct diff_options *options,
 	else if (!strcmp(arg, "--rename-empty"))
 		options->flags.RENAME_EMPTY = 1;
 	else if (!strcmp(arg, "--no-rename-empty"))
-		DIFF_OPT_CLR(options, RENAME_EMPTY);
+		options->flags.RENAME_EMPTY = 0;
 	else if (!strcmp(arg, "--relative"))
 		options->flags.RELATIVE_NAME = 1;
 	else if (skip_prefix(arg, "--relative=", &arg)) {
@@ -4697,8 +4697,8 @@ int diff_opt_parse(struct diff_options *options,
 	else if (!strcmp(arg, "--follow"))
 		options->flags.FOLLOW_RENAMES = 1;
 	else if (!strcmp(arg, "--no-follow")) {
-		DIFF_OPT_CLR(options, FOLLOW_RENAMES);
-		DIFF_OPT_CLR(options, DEFAULT_FOLLOW_RENAMES);
+		options->flags.FOLLOW_RENAMES = 0;
+		options->flags.DEFAULT_FOLLOW_RENAMES = 0;
 	} else if (!strcmp(arg, "--color"))
 		options->use_color = 1;
 	else if (skip_prefix(arg, "--color=", &arg)) {
@@ -4761,12 +4761,12 @@ int diff_opt_parse(struct diff_options *options,
 	else if (!strcmp(arg, "--ext-diff"))
 		options->flags.ALLOW_EXTERNAL = 1;
 	else if (!strcmp(arg, "--no-ext-diff"))
-		DIFF_OPT_CLR(options, ALLOW_EXTERNAL);
+		options->flags.ALLOW_EXTERNAL = 0;
 	else if (!strcmp(arg, "--textconv")) {
 		options->flags.ALLOW_TEXTCONV = 1;
 		options->flags.TEXTCONV_SET_VIA_CMDLINE = 1;
 	} else if (!strcmp(arg, "--no-textconv"))
-		DIFF_OPT_CLR(options, ALLOW_TEXTCONV);
+		options->flags.ALLOW_TEXTCONV = 0;
 	else if (!strcmp(arg, "--ignore-submodules")) {
 		options->flags.OVERRIDE_SUBMODULE_CONFIG = 1;
 		handle_ignore_submodules_arg(options, "all");
@@ -4850,7 +4850,7 @@ int diff_opt_parse(struct diff_options *options,
 	else if (!strcmp(arg, "--function-context"))
 		options->flags.FUNCCONTEXT = 1;
 	else if (!strcmp(arg, "--no-function-context"))
-		DIFF_OPT_CLR(options, FUNCCONTEXT);
+		options->flags.FUNCCONTEXT = 0;
 	else if ((argcount = parse_long_opt("output", av, &optarg))) {
 		char *path = prefix_filename(prefix, optarg);
 		options->file = xfopen(path, "w");
@@ -5688,7 +5688,7 @@ free_queue:
 		if (options->found_changes)
 			options->flags.HAS_CHANGES = 1;
 		else
-			DIFF_OPT_CLR(options, HAS_CHANGES);
+			options->flags.HAS_CHANGES = 0;
 	}
 }
 
@@ -5860,7 +5860,7 @@ void diffcore_std(struct diff_options *options)
 	if (diff_queued_diff.nr && !options->flags.DIFF_FROM_CONTENTS)
 		options->flags.HAS_CHANGES = 1;
 	else
-		DIFF_OPT_CLR(options, HAS_CHANGES);
+		options->flags.HAS_CHANGES = 0;
 
 	options->found_follow = 0;
 }

diff.h

@@ -106,8 +106,6 @@ static inline void diff_flags_or(struct diff_flags *a,
 		tmp_a[i] |= tmp_b[i];
 }
 
-#define DIFF_OPT_CLR(opts, flag)	((opts)->flags.flag = 0)
-
 #define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)
 #define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
 #define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)

merge-recursive.c

@@ -541,7 +541,7 @@ static struct string_list *get_renames(struct merge_options *o,
 
 	diff_setup(&opts);
 	opts.flags.RECURSIVE = 1;
-	DIFF_OPT_CLR(&opts, RENAME_EMPTY);
+	opts.flags.RENAME_EMPTY = 0;
 	opts.detect_rename = DIFF_DETECT_RENAME;
 	opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit :
 			    o->diff_rename_limit >= 0 ? o->diff_rename_limit :

revision.c

@@ -455,7 +455,7 @@ static int rev_compare_tree(struct rev_info *revs,
 	}
 
 	tree_difference = REV_TREE_SAME;
-	DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES);
+	revs->pruning.flags.HAS_CHANGES = 0;
 	if (diff_tree_oid(&t1->object.oid, &t2->object.oid, "",
 			   &revs->pruning) < 0)
 		return REV_TREE_DIFFERENT;
@@ -471,7 +471,7 @@ static int rev_same_tree_as_empty(struct rev_info *revs, struct commit *commit)
 		return 0;
 
 	tree_difference = REV_TREE_SAME;
-	DIFF_OPT_CLR(&revs->pruning, HAS_CHANGES);
+	revs->pruning.flags.HAS_CHANGES = 0;
 	retval = diff_tree_oid(NULL, &t1->object.oid, "", &revs->pruning);
 
 	return retval >= 0 && (tree_difference == REV_TREE_SAME);

submodule.c

@@ -402,9 +402,9 @@ const char *submodule_strategy_to_string(const struct submodule_update_strategy
 void handle_ignore_submodules_arg(struct diff_options *diffopt,
 				  const char *arg)
 {
-	DIFF_OPT_CLR(diffopt, IGNORE_SUBMODULES);
-	DIFF_OPT_CLR(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
-	DIFF_OPT_CLR(diffopt, IGNORE_DIRTY_SUBMODULES);
+	diffopt->flags.IGNORE_SUBMODULES = 0;
+	diffopt->flags.IGNORE_UNTRACKED_IN_SUBMODULES = 0;
+	diffopt->flags.IGNORE_DIRTY_SUBMODULES = 0;
 
 	if (!strcmp(arg, "all"))
 		diffopt->flags.IGNORE_SUBMODULES = 1;