Examples with SignedWord org.graalvm.word.SignedWord used on opensource projects

Example 11 with SignedWord

use of org.graalvm.word.SignedWord in project graal by oracle.

the class PosixUtils method readSingle.

static int readSingle(FileDescriptor fd) throws IOException {
    CCharPointer retPtr = StackValue.get(SizeOf.get(CCharPointer.class));
    int handle = PosixUtils.getFDHandle(fd);
    SignedWord nread = read(handle, retPtr, WordFactory.unsigned(1));
    if (nread.equal(0)) {
        // EOF
        return -1;
    } else if (nread.equal(-1)) {
        throw new IOException(lastErrorString("Read error"));
    }
    return retPtr.read() & 0xFF;
}

Example 12 with SignedWord

use of org.graalvm.word.SignedWord in project graal by oracle.

the class PosixUtils method writeSingle.

@SuppressWarnings("unused")
static void writeSingle(FileDescriptor fd, int b, boolean append) throws IOException {
    SignedWord n;
    int handle = Util_java_io_FileDescriptor.getFD(fd);
    if (handle == -1) {
        throw new IOException("Stream Closed");
    }
    CCharPointer bufPtr = StackValue.get(SizeOf.get(CCharPointer.class));
    bufPtr.write((byte) b);
    // the append parameter is disregarded
    n = write(handle, bufPtr, WordFactory.unsigned(1));
    if (n.equal(-1)) {
        throw new IOException(lastErrorString("Write error"));
    }
}

Example 13 with SignedWord

use of org.graalvm.word.SignedWord in project graal by oracle.

the class PosixJavaIOSubstitutions method skip.

@Substitute
public long skip(long n) throws IOException {
    SignedWord cur = WordFactory.zero();
    SignedWord end = WordFactory.zero();
    int handle = PosixUtils.getFDHandle(fd);
    if ((cur = lseek(handle, WordFactory.zero(), SEEK_CUR())).equal(WordFactory.signed(-1))) {
        throw new IOException(lastErrorString("Seek error"));
    } else if ((end = lseek(handle, WordFactory.signed(n), SEEK_CUR())).equal(WordFactory.signed(-1))) {
        throw new IOException(lastErrorString("Seek error"));
    }
    return end.subtract(cur).rawValue();
}

Example 14 with SignedWord

use of org.graalvm.word.SignedWord in project graal by oracle.

the class PosixJavaIOSubstitutions method getFilePointer.

@Substitute
public long getFilePointer() throws IOException {
    SignedWord ret;
    int handle = PosixUtils.getFDHandle(fd);
    if ((ret = lseek(handle, WordFactory.zero(), SEEK_CUR())).equal(WordFactory.signed(-1))) {
        throw new IOException(lastErrorString("Seek failed"));
    }
    return ret.rawValue();
}

Example 15 with SignedWord

use of org.graalvm.word.SignedWord in project graal by oracle.

the class PosixJavaLangSubstitutions method writeEntirely.

@Uninterruptible(reason = "Called from uninterruptible code.")
static SignedWord writeEntirely(int fd, PointerBase buf, UnsignedWord count) {
    Pointer ptr = WordFactory.pointer(buf.rawValue());
    final Pointer end = ptr.add(count);
    SignedWord written;
    do {
        Errno.set_errno(0);
        written = UnistdNoTransitions.write(fd, ptr, end.subtract(ptr));
        if (written.greaterThan(0)) {
            ptr = ptr.add((int) written.rawValue());
        }
    } while (ptr.notEqual(end) && (written.notEqual(-1) || Errno.errno() == Errno.EINTR()));
    if (ptr.notEqual(buf)) {
        return WordFactory.signed(ptr.rawValue() - buf.rawValue());
    }
    return written;
}