drivers/accessibility/speakup/keyhelp.c

Source file repositories/reference/linux-study-clean/drivers/accessibility/speakup/keyhelp.c

File Facts

System
Linux kernel
Corpus path
drivers/accessibility/speakup/keyhelp.c
Extension
.c
Size
5524 bytes
Lines
210
Domain
Driver Families
Bucket
drivers/accessibility
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (ch == SPACE) {
			spk_special_handler = NULL;
			synth_printf("%s\n", spk_msg_get(MSG_LEAVING_HELP));
			return 1;
		}
		ch |= 32; /* lower case */
		if (ch < 'a' || ch > 'z')
			return -1;
		if (letter_offsets[ch - 'a'] == -1) {
			synth_printf(spk_msg_get(MSG_NO_COMMAND), ch);
			synth_printf("\n");
			return 1;
		}
		cur_item = letter_offsets[ch - 'a'];
	} else if (type == KT_CUR) {
		if (ch == 0 &&
		    (MSG_FUNCNAMES_START + cur_item + 1) <= MSG_FUNCNAMES_END)
			cur_item++;
		else if (ch == 3 && cur_item > 0)
			cur_item--;
		else
			return -1;
	} else if (type == KT_SPKUP && ch == SPEAKUP_HELP &&
		   !spk_special_handler) {
		spk_special_handler = spk_handle_help;
		synth_printf("%s\n", spk_msg_get(MSG_HELP_INFO));
		build_key_data(); /* rebuild each time in case new mapping */
		return 1;
	} else {
		name = NULL;
		if ((type != KT_SPKUP) && (key > 0) && (key <= num_key_names)) {
			synth_printf("%s\n",
				     spk_msg_get(MSG_KEYNAMES_START + key - 1));
			return 1;
		}
		for (i = 0; funcvals[i] != 0 && !name; i++) {
			if (ch == funcvals[i])
				name = spk_msg_get(MSG_FUNCNAMES_START + i);
		}
		if (!name)
			return -1;
		kp = spk_our_keys[key] + 1;
		for (i = 0; i < nstates; i++) {
			if (ch == kp[i])
				break;
		}
		key += (state_tbl[i] << 8);
		say_key(key);
		synth_printf(spk_msg_get(MSG_KEYDESC), name);
		synth_printf("\n");
		return 1;
	}
	name = spk_msg_get(MSG_FUNCNAMES_START + cur_item);
	func = funcvals[cur_item];
	synth_printf("%s", name);
	if (key_offsets[func] == 0) {
		synth_printf(" %s\n", spk_msg_get(MSG_IS_UNASSIGNED));
		return 1;
	}
	p_keys = key_data + key_offsets[func];
	for (n = 0; p_keys[n]; n++) {
		val = p_keys[n];
		if (n > 0)
			synth_printf("%s ", spk_msg_get(MSG_DISJUNCTION));
		say_key(val);
	}
	return 1;
}

Annotation

Implementation Notes