#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; } };