1 files changed, 219 insertions, 0 deletions

diff --git a/minui21/events.c b/minui21/events.c
new file mode 100644
index 000000000..b8cf15ab4
--- /dev/null
+++ b/minui21/events.c
@@ -0,0 +1,219 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <sys/epoll.h>
+
+#include <linux/input.h>
+
+#include "minui.h"
+
+#define MAX_DEVICES 16
+#define MAX_MISC_FDS 16
+
+#define BITS_PER_LONG (sizeof(unsigned long) * 8)
+#define BITS_TO_LONGS(x) (((x) + BITS_PER_LONG - 1) / BITS_PER_LONG)
+
+#define test_bit(bit, array) \
+    ((array)[(bit)/BITS_PER_LONG] & (1 << ((bit) % BITS_PER_LONG)))
+
+struct fd_info {
+    int fd;
+    ev_callback cb;
+    void *data;
+};
+
+static int epollfd;
+static struct epoll_event polledevents[MAX_DEVICES + MAX_MISC_FDS];
+static int npolledevents;
+
+static struct fd_info ev_fdinfo[MAX_DEVICES + MAX_MISC_FDS];
+
+static unsigned ev_count = 0;
+static unsigned ev_dev_count = 0;
+static unsigned ev_misc_count = 0;
+
+int ev_init(ev_callback input_cb, void *data)
+{
+    DIR *dir;
+    struct dirent *de;
+    int fd;
+    struct epoll_event ev;
+    bool epollctlfail = false;
+
+    epollfd = epoll_create(MAX_DEVICES + MAX_MISC_FDS);
+    if (epollfd == -1)
+        return -1;
+
+    dir = opendir("/dev/input");
+    if(dir != 0) {
+        while((de = readdir(dir))) {
+            unsigned long ev_bits[BITS_TO_LONGS(EV_MAX)];
+
+//            fprintf(stderr,"/dev/input/%s\n", de->d_name);
+            if(strncmp(de->d_name,"event",5)) continue;
+            fd = openat(dirfd(dir), de->d_name, O_RDONLY);
+            if(fd < 0) continue;
+
+            /* read the evbits of the input device */
+            if (ioctl(fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits) < 0) {
+                close(fd);
+                continue;
+            }
+
+            /* TODO: add ability to specify event masks. For now, just assume
+             * that only EV_KEY and EV_REL event types are ever needed. */
+            if (!test_bit(EV_KEY, ev_bits) && !test_bit(EV_REL, ev_bits)) {
+                close(fd);
+                continue;
+            }
+
+#ifdef EPOLLWAKEUP
+            ev.events = EPOLLIN | EPOLLWAKEUP;
+#else
+            ev.events = EPOLLIN;
+#endif
+            ev.data.ptr = (void *)&ev_fdinfo[ev_count];
+            if (epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev)) {
+                close(fd);
+                epollctlfail = true;
+                continue;
+            }
+
+            ev_fdinfo[ev_count].fd = fd;
+            ev_fdinfo[ev_count].cb = input_cb;
+            ev_fdinfo[ev_count].data = data;
+            ev_count++;
+            ev_dev_count++;
+            if(ev_dev_count == MAX_DEVICES) break;
+        }
+    }
+
+    if (epollctlfail && !ev_count) {
+        close(epollfd);
+        epollfd = -1;
+        return -1;
+    }
+
+    return 0;
+}
+
+int ev_add_fd(int fd, ev_callback cb, void *data)
+{
+    struct epoll_event ev;
+    int ret;
+
+    if (ev_misc_count == MAX_MISC_FDS || cb == NULL)
+        return -1;
+
+#ifdef EPOLLWAKEUP
+    ev.events = EPOLLIN | EPOLLWAKEUP;
+#else
+    ev.events = EPOLLIN;
+#endif
+    ev.data.ptr = (void *)&ev_fdinfo[ev_count];
+    ret = epoll_ctl(epollfd, EPOLL_CTL_ADD, fd, &ev);
+    if (!ret) {
+        ev_fdinfo[ev_count].fd = fd;
+        ev_fdinfo[ev_count].cb = cb;
+        ev_fdinfo[ev_count].data = data;
+        ev_count++;
+        ev_misc_count++;
+    }
+
+    return ret;
+}
+
+int ev_get_epollfd(void)
+{
+    return epollfd;
+}
+
+void ev_exit(void)
+{
+    while (ev_count > 0) {
+        close(ev_fdinfo[--ev_count].fd);
+    }
+    ev_misc_count = 0;
+    ev_dev_count = 0;
+    close(epollfd);
+}
+
+int ev_wait(int timeout)
+{
+    npolledevents = epoll_wait(epollfd, polledevents, ev_count, timeout);
+    if (npolledevents <= 0)
+        return -1;
+    return 0;
+}
+
+void ev_dispatch(void)
+{
+    int n;
+    int ret;
+
+    for (n = 0; n < npolledevents; n++) {
+        struct fd_info *fdi = polledevents[n].data.ptr;
+        ev_callback cb = fdi->cb;
+        if (cb)
+            cb(fdi->fd, polledevents[n].events, fdi->data);
+    }
+}
+
+int ev_get_input(int fd, uint32_t epevents, struct input_event *ev)
+{
+    int r;
+
+    if (epevents & EPOLLIN) {
+        r = read(fd, ev, sizeof(*ev));
+        if (r == sizeof(*ev))
+            return 0;
+    }
+    return -1;
+}
+
+int ev_sync_key_state(ev_set_key_callback set_key_cb, void *data)
+{
+    unsigned long key_bits[BITS_TO_LONGS(KEY_MAX)];
+    unsigned long ev_bits[BITS_TO_LONGS(EV_MAX)];
+    unsigned i;
+    int ret;
+
+    for (i = 0; i < ev_dev_count; i++) {
+        int code;
+
+        memset(key_bits, 0, sizeof(key_bits));
+        memset(ev_bits, 0, sizeof(ev_bits));
+
+        ret = ioctl(ev_fdinfo[i].fd, EVIOCGBIT(0, sizeof(ev_bits)), ev_bits);
+        if (ret < 0 || !test_bit(EV_KEY, ev_bits))
+            continue;
+
+        ret = ioctl(ev_fdinfo[i].fd, EVIOCGKEY(sizeof(key_bits)), key_bits);
+        if (ret < 0)
+            continue;
+
+        for (code = 0; code <= KEY_MAX; code++) {
+            if (test_bit(code, key_bits))
+                set_key_cb(code, 1, data);
+        }
+    }
+
+    return 0;
+}