1#include "perf.h"
2#include "util/util.h"
3#include "util/debug.h"
4#include "util/parse-options.h"
5#include "util/parse-regs-options.h"
6
7int
8parse_regs(const struct option *opt, const char *str, int unset)
9{
10	uint64_t *mode = (uint64_t *)opt->value;
11	const struct sample_reg *r;
12	char *s, *os = NULL, *p;
13	int ret = -1;
14
15	if (unset)
16		return 0;
17
18	/*
19	 * cannot set it twice
20	 */
21	if (*mode)
22		return -1;
23
24	/* str may be NULL in case no arg is passed to -I */
25	if (str) {
26		/* because str is read-only */
27		s = os = strdup(str);
28		if (!s)
29			return -1;
30
31		for (;;) {
32			p = strchr(s, ',');
33			if (p)
34				*p = '\0';
35
36			if (!strcmp(s, "?")) {
37				fprintf(stderr, "available registers: ");
38				for (r = sample_reg_masks; r->name; r++) {
39					fprintf(stderr, "%s ", r->name);
40				}
41				fputc('\n', stderr);
42				/* just printing available regs */
43				return -1;
44			}
45			for (r = sample_reg_masks; r->name; r++) {
46				if (!strcasecmp(s, r->name))
47					break;
48			}
49			if (!r->name) {
50				ui__warning("unknown register %s,"
51					    " check man page\n", s);
52				goto error;
53			}
54
55			*mode |= r->mask;
56
57			if (!p)
58				break;
59
60			s = p + 1;
61		}
62	}
63	ret = 0;
64
65	/* default to all possible regs */
66	if (*mode == 0)
67		*mode = PERF_REGS_MASK;
68error:
69	free(os);
70	return ret;
71}
72