1 // SPDX-License-Identifier: GPL-2.0
26 	const char *s1 = (*c1)->name, *s2 = (*c2)->name;  in levenshtein_compare()
27 	int l1 = (*c1)->len;  in levenshtein_compare()
28 	int l2 = (*c2)->len;  in levenshtein_compare()
29 	return l1 != l2 ? l1 - l2 : strcmp(s1, s2);  in levenshtein_compare()
34 	unsigned int i, nr = cmds->cnt + old->cnt;  in add_cmd_list()
37 	if (nr > cmds->alloc) {  in add_cmd_list()
39 		if (alloc_nr(cmds->alloc) < nr)  in add_cmd_list()
40 			cmds->alloc = nr;  in add_cmd_list()
42 			cmds->alloc = alloc_nr(cmds->alloc);  in add_cmd_list()
43 		tmp = realloc(cmds->names, cmds->alloc * sizeof(*cmds->names));  in add_cmd_list()
45 			return -1;  in add_cmd_list()
46 		cmds->names = tmp;  in add_cmd_list()
48 	for (i = 0; i < old->cnt; i++)  in add_cmd_list()
49 		cmds->names[cmds->cnt++] = old->names[i];  in add_cmd_list()
50 	zfree(&old->names);  in add_cmd_list()
51 	old->cnt = 0;  in add_cmd_list()
55 const char *help_unknown_cmd(const char *cmd, struct cmdnames *main_cmds)  in help_unknown_cmd()  argument
64 	load_command_list("perf-", main_cmds, &other_cmds);  in help_unknown_cmd()
70 	qsort(main_cmds->names, main_cmds->cnt,  in help_unknown_cmd()
71 	      sizeof(main_cmds->names), cmdname_compare);  in help_unknown_cmd()
74 	if (main_cmds->cnt) {  in help_unknown_cmd()
75 		/* This reuses cmdname->len for similarity index */  in help_unknown_cmd()
76 		for (i = 0; i < main_cmds->cnt; ++i) {  in help_unknown_cmd()
77 			main_cmds->names[i]->len =  in help_unknown_cmd()
78 				levenshtein(cmd, main_cmds->names[i]->name,  in help_unknown_cmd()
84 		qsort(main_cmds->names, main_cmds->cnt,  in help_unknown_cmd()
85 		      sizeof(*main_cmds->names), levenshtein_compare);  in help_unknown_cmd()
87 		best_similarity = main_cmds->names[0]->len;  in help_unknown_cmd()
89 		while (n < main_cmds->cnt && best_similarity == main_cmds->names[n]->len)  in help_unknown_cmd()
94 		const char *assumed = main_cmds->names[0]->name;  in help_unknown_cmd()
96 		main_cmds->names[0] = NULL;  in help_unknown_cmd()
101 			cmd, assumed);  in help_unknown_cmd()
110 	fprintf(stderr, "perf: '%s' is not a perf-command. See 'perf --help'.\n", cmd);  in help_unknown_cmd()
112 	if (main_cmds->cnt && best_similarity < 6) {  in help_unknown_cmd()
117 			fprintf(stderr, "\t%s\n", main_cmds->names[i]->name);  in help_unknown_cmd()