upload android base code part6

android/system/media/audio_utils/tests/getch.c

@@ -0,0 +1,65 @@
+/*
+C non-blocking keyboard input
+http://stackoverflow.com/questions/448944/c-non-blocking-keyboard-input
+*/
+
+#include <stdlib.h>
+#include <string.h>
+#include <sys/select.h>
+#include <termios.h>
+#include <unistd.h>
+#include "getch.h"
+
+struct termios orig_termios;
+
+void reset_terminal_mode()
+{
+    tcsetattr(0, TCSANOW, &orig_termios);
+}
+
+void set_conio_terminal_mode()
+{
+    struct termios new_termios;
+
+    /* take two copies - one for now, one for later */
+    tcgetattr(0, &orig_termios);
+    memcpy(&new_termios, &orig_termios, sizeof(new_termios));
+
+    /* register cleanup handler, and set the new terminal mode */
+    atexit(reset_terminal_mode);
+    cfmakeraw(&new_termios);
+    new_termios.c_oflag |= OPOST;
+    tcsetattr(0, TCSANOW, &new_termios);
+}
+
+int kbhit()
+{
+    struct timeval tv = { 0L, 0L };
+    fd_set fds;
+    FD_ZERO(&fds); // not in original posting to stackoverflow
+    FD_SET(0, &fds);
+    return select(1, &fds, NULL, NULL, &tv);
+}
+
+int getch()
+{
+    int r;
+    unsigned char c;
+    if ((r = read(0, &c, sizeof(c))) < 0) {
+        return r;
+    } else {
+        return c;
+    }
+}
+
+#if 0
+int main(int argc, char *argv[])
+{
+    set_conio_terminal_mode();
+
+    while (!kbhit()) {
+        /* do some work */
+    }
+    (void)getch(); /* consume the character */
+}
+#endif