Fix compilation against various versions of fuse library

Usage C++0x to remove lots of code duplication in wrappers
Move code for FuseAppBase into it's own folder

1 files changed, 271 insertions, 0 deletions

diff --git a/libfusepp/fuseapp.cpp b/libfusepp/fuseapp.cpp
new file mode 100644
index 0000000..e81a116
--- /dev/null
+++ b/libfusepp/fuseapp.cpp
@@ -0,0 +1,271 @@
+#include "fuseapp.h"
+#include <errno.h>
+#include <assert.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <typeinfo>
+
+static FuseAppBase * fuseApp;
+
+FuseAppBase::FuseAppBase()
+{
+}
+FuseAppBase::~FuseAppBase()
+{
+}
+void * FuseAppBase::init(fuse_conn_info*)
+{
+	return NULL;
+}
+int FuseAppBase::opt_parse(void*, const char *, int, fuse_args*)
+{
+	return 1;
+}
+int FuseAppBase::access(const char *, int)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::chmod(const char *, mode_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::chown(const char *, uid_t, gid_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::create(const char *, mode_t, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::fgetattr(const char *, struct stat *, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::flush(const char *, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::fsync(const char *, int, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::fsyncdir(const char *, int, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::ftruncate(const char *, off_t, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::getattr(const char *, struct stat *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::getxattr(const char *, const char *, char *, size_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::link(const char *, const char *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::listxattr(const char *, char *, size_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::mkdir(const char *, mode_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::mknod(const char *, mode_t, dev_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::open(const char *, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::opendir(const char *, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::read(const char *, char *, size_t, off_t, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::readdir(const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::readlink(const char *, char *, size_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::release(const char *, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::releasedir(const char *, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::removexattr(const char *, const char *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::rename(const char *, const char *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::rmdir(const char *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::setxattr(const char *, const char *, const char *, size_t, int)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::statfs(const char *, struct statvfs *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::symlink(const char *, const char *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::truncate(const char *, off_t)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::unlink(const char *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::write(const char *, const char *, size_t, off_t, struct fuse_file_info *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::lock(const char *, struct fuse_file_info *, int, struct flock *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::utimens(const char *, const struct timespec[2])
+{
+	return -ENOSYS;
+}
+int FuseAppBase::bmap(const char *, size_t, uint64_t *)
+{
+	return -ENOSYS;
+}
+int FuseAppBase::onError(const std::exception & e) throw()
+{
+	fprintf(stderr, "Unknown exception calling (what: %s)\n", e.what());
+	return -ENOSYS;
+}
+
+template <typename... Args>
+class fuseCall {
+	public:
+		template <int (FuseAppBase::*f)(Args...)>
+			static int helper(Args ... a)
+			{
+				try {
+					return (fuseApp->*f)(a...);
+				}
+				catch (const std::exception & ex) {
+					if (int rtn = fuseApp->onError(ex)) {
+						return rtn;
+					}
+					return helper<f>(a...);
+				}
+				catch (...) {
+					fprintf(stderr, "Unknown exception calling %s\n", typeid(f).name());
+					return -ENOSYS;
+				}
+			}
+};
+static void * fuseInit (struct fuse_conn_info *conn)
+{
+	return fuseApp->init(conn);
+}
+static void fuseDestroy(void *)
+{
+	delete fuseApp;
+}
+
+int
+FuseAppBase::run(int & argc, char** & argv, FuseAppBase * fa)
+{
+	struct fuse_opt fuse_opts[] = {
+		{ NULL, 0, 0 }
+	};
+	fuseApp = fa;
+	struct fuse_operations operations = {
+		fuseCall<const char *, struct stat *>::helper<&FuseAppBase::getattr>,
+		fuseCall<const char *, char *, size_t>::helper<&FuseAppBase::readlink>,
+		NULL, // getdir deprecated
+		fuseCall<const char *, mode_t, dev_t>::helper<&FuseAppBase::mknod>,
+		fuseCall<const char *, mode_t>::helper<&FuseAppBase::mkdir>,
+		fuseCall<const char *>::helper<&FuseAppBase::unlink>,
+		fuseCall<const char *>::helper<&FuseAppBase::rmdir>,
+		fuseCall<const char *, const char *>::helper<&FuseAppBase::symlink>,
+		fuseCall<const char *, const char *>::helper<&FuseAppBase::rename>,
+		fuseCall<const char *, const char *>::helper<&FuseAppBase::link>,
+		fuseCall<const char *, mode_t>::helper<&FuseAppBase::chmod>,
+		fuseCall<const char *, uid_t, gid_t>::helper<&FuseAppBase::chown>,
+		fuseCall<const char *, off_t>::helper<&FuseAppBase::truncate>,
+		NULL, // utime deprecated
+		fuseCall<const char *, struct fuse_file_info *>::helper<&FuseAppBase::open>,
+		fuseCall<const char *, char *, size_t, off_t, struct fuse_file_info *>::helper<&FuseAppBase::read>,
+		fuseCall<const char *, const char *, size_t, off_t, struct fuse_file_info *>::helper<&FuseAppBase::write>,
+		fuseCall<const char *, struct statvfs *>::helper<&FuseAppBase::statfs>,
+		fuseCall<const char *, struct fuse_file_info *>::helper<&FuseAppBase::flush>,
+		fuseCall<const char *, struct fuse_file_info *>::helper<&FuseAppBase::release>,
+		fuseCall<const char *, int, struct fuse_file_info *>::helper<&FuseAppBase::fsync>,
+		fuseCall<const char *, const char *, const char *, size_t, int>::helper<&FuseAppBase::setxattr>,
+		fuseCall<const char *, const char *, char *, size_t>::helper<&FuseAppBase::getxattr>,
+		fuseCall<const char *, char *, size_t>::helper<&FuseAppBase::listxattr>,
+		fuseCall<const char *, const char *>::helper<&FuseAppBase::removexattr>,
+		fuseCall<const char *, struct fuse_file_info *>::helper<&FuseAppBase::opendir>,
+		fuseCall<const char *, void *, fuse_fill_dir_t, off_t, struct fuse_file_info *>::helper<&FuseAppBase::readdir>,
+		fuseCall<const char *, struct fuse_file_info *>::helper<&FuseAppBase::releasedir>,
+		fuseCall<const char *, int, struct fuse_file_info *>::helper<&FuseAppBase::fsyncdir>,
+		fuseInit,
+		fuseDestroy,
+		fuseCall<const char *, int>::helper<&FuseAppBase::access>,
+		fuseCall<const char *, mode_t, struct fuse_file_info *>::helper<&FuseAppBase::create>,
+		fuseCall<const char *, off_t, struct fuse_file_info *>::helper<&FuseAppBase::ftruncate>,
+		fuseCall<const char *, struct stat *, struct fuse_file_info *>::helper<&FuseAppBase::fgetattr>
+#if (FUSE_MINOR_VERSION >= 6)
+			,
+		fuseCall<const char *, struct fuse_file_info *, int, struct flock *>::helper<&FuseAppBase::lock>,
+		fuseCall<const char *, const struct timespec [2]>::helper<&FuseAppBase::utimens>,
+		fuseCall<const char *, size_t, uint64_t *>::helper<&FuseAppBase::bmap>
+#if (FUSE_MINOR_VERSION >= 8)
+			,
+		0, // flag_nullpath_ok
+#if (FUSE_MINOR_VERSION >= 9)
+		0, // flag_nopath
+		0, // flag_utime_omit_ok
+#endif
+		0, // flag_reserved
+		NULL, // ioctl
+		NULL // poll
+#if (FUSE_MINOR_VERSION >= 9)
+			,
+		NULL, // writebuf
+		NULL, // readbuf
+		NULL // flock
+#endif
+#endif
+#endif
+	};
+	struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
+	if (fuse_opt_parse(&args, fuseApp, fuse_opts,
+			fuseCall<void *, const char *, int, struct fuse_args *>::helper<&FuseAppBase::opt_parse>) == -1) {
+		exit(1);
+	}
+	return fuse_main(args.argc, args.argv, &operations, fa);
+}
+