1 files changed, 70 insertions, 0 deletions
diff --git a/lib/st-download.cc b/lib/st-download.cc
new file mode 100644
index 0000000..b56e52d
--- a/dev/null
+++ b/lib/st-download.cc
@@ -0,0 +1,70 @@
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <termios.h>
+#include <stdexcept>
+#include <napkin/exception.h>
+#include <napkin/st/download.h>
+#include <napkin/st/decode.h>
+
+namespace napkin {
+    namespace sleeptracker {
+	using std::runtime_error;
+
+	int	download_initiate(const char *port) {
+	    int fd = open(port?port:"/dev/sleeptracker",
+		    O_RDWR|O_NOCTTY|O_NONBLOCK);
+	    if(fd<0)
+		throw exception_st_port("failed to open() sleeptracker port");
+
+	    if(tcflush(fd,TCIOFLUSH)) {
+		close(fd);
+		throw exception_st_port("failed to tcflush()");
+	    }
+	    struct termios ts;
+	    ts.c_cflag = CS8|CREAD;
+	    cfsetispeed(&ts,B2400); cfsetospeed(&ts,B2400);
+	    ts.c_iflag = IGNPAR;
+	    ts.c_oflag = ts.c_lflag = 0;
+	    ts.c_cc[VMIN]=1; ts.c_cc[VTIME]=0;
+	    if(tcsetattr(fd,TCSANOW,&ts)) {
+		close(fd);
+		throw exception_st_port("failed to tcsetattr()");
+	    }
+
+	    if(write(fd,"V",1)!=1) {
+		close(fd);
+		throw exception_st_port("failed to write() to sleeptracker");
+	    }
+	    return fd;
+	}
+	size_t download_finish(int fd,void *buffer,size_t buffer_size) {
+	    size_t rv = read(fd,buffer,buffer_size);
+	    close(fd);
+
+	    if(rv==(size_t)-1)
+		throw exception_st_port("failed to read() from sleeptracker");
+	    return rv;
+	}
+
+	size_t download(
+		void *buffer,size_t buffer_size,
+		const char *port) {
+	    int fd = download_initiate(port);
+	    /* this is not the best way to wait for data, but
+	     * after all it's a sleeptracker! */
+	    sleep(1);
+	    return download_finish(fd,buffer,buffer_size);
+	}
+
+	hypnodata_ptr_t download(const char *port) {
+	    char buffer[2048];
+	    size_t rb = download(buffer,sizeof(buffer),port);
+	    hypnodata_ptr_t rv( new hypnodata_t );
+	    decode(*rv,buffer,rb);
+	    return rv;
+	}
+
+    }
+}