tools/perf/ui/browsers/header.c

Source file repositories/reference/linux-study-clean/tools/perf/ui/browsers/header.c

File Facts

System
Linux kernel
Corpus path
tools/perf/ui/browsers/header.c
Extension
.c
Size
2609 bytes
Lines
129
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

switch (key) {
		case K_RIGHT:
			offset = (unsigned long)menu->priv;
			offset += 10;
			menu->priv = (void *)offset;
			continue;
		case K_LEFT:
			offset = (unsigned long)menu->priv;
			if (offset >= 10)
				offset -= 10;
			menu->priv = (void *)offset;
			continue;
		case K_F1:
		case 'h':
		case '?':
			ui_browser__help_window(menu, help);
			continue;
		case K_ESC:
		case 'q':
		case CTRL('c'):
			key = -1;
			break;
		default:
			ui_browser__warn_unhandled_hotkey(menu, key, 0, ", use 'h'/'?'/F1 to see actions");
			continue;
		}

		break;
	}

	ui_browser__hide(menu);
	return key;
}

static int ui__list_menu(int argc, char * const argv[])
{
	struct ui_browser menu = {
		.entries    = (void *)argv,
		.refresh    = ui_browser__argv_refresh,
		.seek	    = ui_browser__argv_seek,
		.write	    = ui_browser__argv_write,
		.nr_entries = argc,
	};

	return list_menu__run(&menu);
}

int tui__header_window(struct perf_session *session)
{
	int i, argc = 0;
	char **argv;
	char *ptr, *pos;
	size_t size;
	FILE *fp = open_memstream(&ptr, &size);

	perf_header__fprintf_info(session, fp, true);
	fclose(fp);

	for (pos = ptr, argc = 0; (pos = strchr(pos, '\n')) != NULL; pos++)
		argc++;

	argv = calloc(argc + 1, sizeof(*argv));
	if (argv == NULL)
		goto out;

	argv[0] = pos = ptr;
	for (i = 1; (pos = strchr(pos, '\n')) != NULL; i++) {
		*pos++ = '\0';
		argv[i] = pos;
	}

	BUG_ON(i != argc + 1);

	ui__list_menu(argc, argv);

out:
	free(argv);
	free(ptr);
	return 0;
}

Annotation

Implementation Notes