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#define LOG_TAG "KeyLayoutMap"
#include "KeyLayoutMap.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <utils/String8.h>
#include <stdlib.h>
#include <ui/KeycodeLabels.h>
#include <utils/Log.h>
namespace android {
KeyLayoutMap::KeyLayoutMap()
:m_status(NO_INIT),
m_keys()
{
}
KeyLayoutMap::~KeyLayoutMap()
{
}
static String8
next_token(char const** p, int *line)
{
bool begun = false;
const char* begin = *p;
const char* end = *p;
while (true) {
if (*end == '\n') {
(*line)++;
}
switch (*end)
{
case '#':
if (begun) {
*p = end;
return String8(begin, end-begin);
} else {
do {
begin++;
end++;
} while (*begin != '\0' && *begin != '\n');
}
case '\0':
case ' ':
case '\n':
case '\r':
case '\t':
if (begun || (*end == '\0')) {
*p = end;
return String8(begin, end-begin);
} else {
begin++;
end++;
break;
}
default:
end++;
begun = true;
}
}
}
static int32_t
token_to_value(const char *literal, const KeycodeLabel *list)
{
while (list->literal) {
if (0 == strcmp(literal, list->literal)) {
return list->value;
}
list++;
}
return list->value;
}
status_t
KeyLayoutMap::load(const char* filename)
{
int fd = open(filename, O_RDONLY);
if (fd < 0) {
LOGE("error opening file=%s err=%s\n", filename, strerror(errno));
m_status = errno;
return errno;
}
off_t len = lseek(fd, 0, SEEK_END);
off_t errlen = lseek(fd, 0, SEEK_SET);
if (len < 0 || errlen < 0) {
close(fd);
LOGE("error seeking file=%s err=%s\n", filename, strerror(errno));
m_status = errno;
return errno;
}
char* buf = (char*)malloc(len+1);
if (read(fd, buf, len) != len) {
LOGE("error reading file=%s err=%s\n", filename, strerror(errno));
m_status = errno != 0 ? errno : ((int)NOT_ENOUGH_DATA);
return errno != 0 ? errno : ((int)NOT_ENOUGH_DATA);
}
errno = 0;
buf[len] = '\0';
int32_t scancode = -1;
int32_t keycode = -1;
uint32_t flags = 0;
uint32_t tmp;
char* end;
status_t err = NO_ERROR;
int line = 1;
char const* p = buf;
enum { BEGIN, SCANCODE, KEYCODE, FLAG } state = BEGIN;
while (true) {
String8 token = next_token(&p, &line);
if (*p == '\0') {
break;
}
switch (state)
{
case BEGIN:
if (token == "key") {
state = SCANCODE;
} else {
LOGE("%s:%d: expected key, got '%s'\n", filename, line,
token.string());
err = BAD_VALUE;
goto done;
}
break;
case SCANCODE:
scancode = strtol(token.string(), &end, 0);
if (*end != '\0') {
LOGE("%s:%d: expected scancode (a number), got '%s'\n",
filename, line, token.string());
goto done;
}
//LOGI("%s:%d: got scancode %d\n", filename, line, scancode );
state = KEYCODE;
break;
case KEYCODE:
keycode = token_to_value(token.string(), KEYCODES);
//LOGI("%s:%d: got keycode %d for %s\n", filename, line, keycode, token.string() );
if (keycode == 0) {
LOGE("%s:%d: expected keycode, got '%s'\n",
filename, line, token.string());
goto done;
}
state = FLAG;
break;
case FLAG:
if (token == "key") {
if (scancode != -1) {
//LOGI("got key decl scancode=%d keycode=%d"
// " flags=0x%08x\n", scancode, keycode, flags);
Key k = { keycode, flags };
m_keys.add(scancode, k);
state = SCANCODE;
scancode = -1;
keycode = -1;
flags = 0;
break;
}
}
tmp = token_to_value(token.string(), FLAGS);
//LOGI("%s:%d: got flags %x for %s\n", filename, line, tmp, token.string() );
if (tmp == 0) {
LOGE("%s:%d: expected flag, got '%s'\n",
filename, line, token.string());
goto done;
}
flags |= tmp;
break;
}
}
if (state == FLAG && scancode != -1 ) {
//LOGI("got key decl scancode=%d keycode=%d"
// " flags=0x%08x\n", scancode, keycode, flags);
Key k = { keycode, flags };
m_keys.add(scancode, k);
}
done:
free(buf);
close(fd);
m_status = err;
return err;
}
status_t
KeyLayoutMap::map(int32_t scancode, int32_t *keycode, uint32_t *flags) const
{
if (m_status != NO_ERROR) {
return m_status;
}
ssize_t index = m_keys.indexOfKey(scancode);
if (index < 0) {
//LOGW("couldn't map scancode=%d\n", scancode);
return NAME_NOT_FOUND;
}
const Key& k = m_keys.valueAt(index);
*keycode = k.keycode;
*flags = k.flags;
//LOGD("mapped scancode=%d to keycode=%d flags=0x%08x\n", scancode,
// keycode, flags);
return NO_ERROR;
}
status_t
KeyLayoutMap::findScancodes(int32_t keycode, Vector<int32_t>* outScancodes) const
{
if (m_status != NO_ERROR) {
return m_status;
}
const size_t N = m_keys.size();
for (size_t i=0; i<N; i++) {
if (m_keys.valueAt(i).keycode == keycode) {
outScancodes->add(m_keys.keyAt(i));
}
}
return NO_ERROR;
}
};
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