Move virtfsrwops into virtfs directory.

1 files changed, 427 insertions, 0 deletions

diff --git a/src/fs/virtfs/virtfsrwops.cpp b/src/fs/virtfs/virtfsrwops.cpp
new file mode 100644
index 000000000..0816b93eb
--- /dev/null
+++ b/src/fs/virtfs/virtfsrwops.cpp
@@ -0,0 +1,427 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2013-2017  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * This code provides a glue layer between PhysicsFS and Simple Directmedia
+ *  Layer's (SDL) RWops i/o abstraction.
+ *
+ * License: this code is public domain. I make no warranty that it is useful,
+ *  correct, harmless, or environmentally safe.
+ *
+ * This particular file may be used however you like, including copying it
+ *  verbatim into a closed-source project, exploiting it commercially, and
+ *  removing any trace of my name from the source (although I hope you won't
+ *  do that). I welcome enhancements and corrections to this file, but I do
+ *  not require you to send me patches if you make changes. This code has
+ *  NO WARRANTY.
+ *
+ * Unless otherwise stated, the rest of PhysicsFS falls under the zlib license.
+ *  Please see LICENSE.txt in the root of the source tree.
+ *
+ * SDL falls under the LGPL license. You can get SDL at http://www.libsdl.org/
+ *
+ *  This file was written by Ryan C. Gordon. (icculus@icculus.org).
+ *
+ *  Copyright (C) 2012-2017  The ManaPlus Developers
+ */
+
+#include "fs/virtfs/virtfsrwops.h"
+
+#include "logger.h"
+
+#include "fs/virtfs/virtfs.h"
+
+#ifdef DEBUG_VIRTFS
+#include "utils/debugmemoryobject.h"
+
+#include <map>
+#endif  // DEBUG_VIRTFS
+
+#include "utils/fuzzer.h"
+
+#include "debug.h"
+
+#ifdef USE_SDL2
+#define RWOPSINT int64_t
+#define RWOPSSIZE size_t
+#else  // USE_SDL2
+#define RWOPSINT int32_t
+#define RWOPSSIZE int
+#endif  // USE_SDL2
+
+#ifdef DUMP_LEAKED_RESOURCES
+static int openedRWops = 0;
+#endif  // DUMP_LEAKED_RESOURCES
+
+#ifdef DEBUG_VIRTFS
+namespace
+{
+    std::map<void*, VirtFs::DebugMemoryObject*> mRWops;
+}  // namespace
+
+static SDL_RWops *addDebugRWops(SDL_RWops *restrict const rwops,
+                                const char *restrict const name,
+                                const char *restrict const file,
+                                const unsigned line)
+{
+    if (!rwops)
+        return nullptr;
+
+    mRWops[rwops] = new VirtFs::DebugMemoryObject(name, file, line);
+    return rwops;
+}
+
+static void deleteDebugRWops(SDL_RWops *const rwops)
+{
+    if (!rwops)
+        return;
+
+    std::map<void*, VirtFs::DebugMemoryObject*>::iterator it =
+        mRWops.find(rwops);
+    if (it == mRWops.end())
+    {
+        logger->log("bad RWops delete: %p", static_cast<void*>(rwops));
+    }
+    else
+    {
+        VirtFs::DebugMemoryObject *const obj = (*it).second;
+        if (obj)
+        {
+            mRWops.erase(rwops);
+            delete obj;
+        }
+    }
+}
+
+void VirtFs::reportLeaks()
+{
+    if (!mRWops.empty())
+    {
+        logger->log("RWops leaks detected");
+        std::map<void*, VirtFs::DebugMemoryObject*>::iterator it =
+            mRWops.begin();
+        const std::map<void*, VirtFs::DebugMemoryObject*>::iterator
+            it_end = mRWops.end();
+        for (; it != it_end; ++it)
+        {
+            VirtFs::DebugMemoryObject *obj = (*it).second;
+            if (obj)
+            {
+                logger->log("file: %s at %s", obj->mName.c_str(),
+                    obj->mAddFile.c_str());
+                delete obj;
+            }
+        }
+        mRWops.clear();
+    }
+}
+#endif  // DEBUG_VIRTFS
+
+static RWOPSINT virtfsrwops_seek(SDL_RWops *const rw,
+                                 const RWOPSINT offset,
+                                 const int whence)
+{
+    if (!rw)
+        return -1;
+    VirtFile *const handle = static_cast<VirtFile *const>(
+        rw->hidden.unknown.data1);
+    RWOPSINT pos = 0;
+
+    if (whence == SEEK_SET)
+    {
+        pos = offset;
+    } /* if */
+    else if (whence == SEEK_CUR)
+    {
+        const int64_t current = VirtFs::tell(handle);
+        if (current == -1)
+        {
+            logger->assertLog(
+                "virtfsrwops_seek: Can't find position in file.");
+            return -1;
+        } /* if */
+
+        pos = CAST_S32(current);
+        if (static_cast<int64_t>(pos) != current)
+        {
+            logger->assertLog("virtfsrwops_seek: "
+                "Can't fit current file position in an int!");
+            return -1;
+        } /* if */
+
+        if (offset == 0)  /* this is a "tell" call. We're done. */
+            return pos;
+
+        pos += offset;
+    } /* else if */
+    else if (whence == SEEK_END)
+    {
+        const int64_t len = VirtFs::fileLength(handle);
+        if (len == -1)
+        {
+            logger->assertLog("virtfsrwops_seek:Can't find end of file.");
+            return -1;
+        } /* if */
+
+        pos = static_cast<RWOPSINT>(len);
+        if (static_cast<int64_t>(pos) != len)
+        {
+            logger->assertLog("virtfsrwops_seek: "
+                "Can't fit end-of-file position in an int!");
+            return -1;
+        } /* if */
+
+        pos += offset;
+    } /* else if */
+    else
+    {
+        logger->assertLog("virtfsrwops_seek: Invalid 'whence' parameter.");
+        return -1;
+    } /* else */
+
+    if (pos < 0)
+    {
+        logger->assertLog("virtfsrwops_seek: "
+            "Attempt to seek past start of file.");
+        return -1;
+    } /* if */
+
+    if (!VirtFs::seek(handle, static_cast<uint64_t>(pos)))
+    {
+        logger->assertLog("virtfsrwops_seek: seek error.");
+        return -1;
+    } /* if */
+
+    return pos;
+} /* virtfsrwops_seek */
+
+static RWOPSSIZE virtfsrwops_read(SDL_RWops *const rw,
+                                  void *const ptr,
+                                  const RWOPSSIZE size,
+                                  const RWOPSSIZE maxnum)
+{
+    if (!rw)
+        return 0;
+    VirtFile *const handle = static_cast<VirtFile *const>(
+        rw->hidden.unknown.data1);
+    const int64_t rc = VirtFs::read(handle, ptr,
+        CAST_U32(size),
+        CAST_U32(maxnum));
+    if (rc != static_cast<int64_t>(maxnum))
+    {
+        if (!VirtFs::eof(handle)) /* not EOF? Must be an error. */
+        {
+            logger->assertLog("virtfsrwops_seek: read error.");
+        }
+    } /* if */
+
+    return CAST_S32(rc);
+} /* virtfsrwops_read */
+
+static RWOPSSIZE virtfsrwops_write(SDL_RWops *const rw,
+                                   const void *const ptr,
+                                   const RWOPSSIZE size,
+                                   const RWOPSSIZE num)
+{
+    if (!rw)
+        return 0;
+    VirtFile *const handle = static_cast<VirtFile *const>(
+        rw->hidden.unknown.data1);
+    const int64_t rc = VirtFs::write(handle, ptr,
+        CAST_U32(size),
+        CAST_U32(num));
+    if (rc != static_cast<int64_t>(num))
+    {
+        logger->assertLog("virtfsrwops_seek: write error.");
+    }
+
+    return CAST_S32(rc);
+} /* virtfsrwops_write */
+
+static int virtfsrwops_close(SDL_RWops *const rw)
+{
+    if (!rw)
+        return 0;
+    VirtFile *const handle = static_cast<VirtFile*>(
+        rw->hidden.unknown.data1);
+    if (!VirtFs::close(handle))
+    {
+        logger->assertLog("virtfsrwops_seek: close error.");
+        return -1;
+    } /* if */
+
+    SDL_FreeRW(rw);
+#ifdef DUMP_LEAKED_RESOURCES
+    if (openedRWops <= 0)
+        logger->assertLog("virtfsrwops_seek: closing already closed RWops");
+    openedRWops --;
+#endif  // DUMP_LEAKED_RESOURCES
+#ifdef DEBUG_VIRTFS
+    deleteDebugRWops(rw);
+#endif  // DEBUG_VIRTFS
+
+    return 0;
+} /* virtfsrwops_close */
+
+#ifdef USE_SDL2
+static RWOPSINT virtfsrwops_size(SDL_RWops *const rw)
+{
+    VirtFile *const handle = static_cast<VirtFile *const>(
+        rw->hidden.unknown.data1);
+    return VirtFs::fileLength(handle);
+} /* virtfsrwops_size */
+#endif  // USE_SDL2
+
+static SDL_RWops *create_rwops(VirtFile *const file)
+{
+    SDL_RWops *retval = nullptr;
+
+    if (!file)
+    {
+        logger->assertLog("virtfsrwops_seek: create rwops error.");
+    }
+    else
+    {
+        retval = SDL_AllocRW();
+        if (retval)
+        {
+#ifdef USE_SDL2
+            retval->size  = &virtfsrwops_size;
+#endif  // USE_SDL2
+
+            retval->seek  = &virtfsrwops_seek;
+            retval->read  = &virtfsrwops_read;
+            retval->write = &virtfsrwops_write;
+            retval->close = &virtfsrwops_close;
+            retval->hidden.unknown.data1 = file;
+        } /* if */
+#ifdef DUMP_LEAKED_RESOURCES
+        openedRWops ++;
+#endif  // DUMP_LEAKED_RESOURCES
+    } /* else */
+
+    return retval;
+} /* create_rwops */
+
+SDL_RWops *VirtFs::MakeRWops(VirtFile *const handle)
+{
+    SDL_RWops *retval = nullptr;
+    if (!handle)
+    {
+        logger->assertLog("virtfsrwops_seek: NULL pointer passed to "
+            "RWopsmakeRWops().");
+    }
+    else
+    {
+        retval = create_rwops(handle);
+    }
+
+    return retval;
+} /* RWopsmakeRWops */
+
+#ifdef __APPLE__
+static bool checkFilePath(const std::string &restrict fname)
+{
+    if (fname.empty())
+        return false;
+    if (!VirtFs::exists(fname) || VirtFs::isDirectory(fname))
+        return false;
+    return true;
+}
+#endif  // __APPLE__
+
+#ifdef DEBUG_VIRTFS
+#undef RWopsOpenRead
+SDL_RWops *VirtFs::RWopsOpenRead(const std::string &restrict fname,
+                                 const char *restrict const file,
+                                 const unsigned line)
+#else  // DEBUG_VIRTFS
+SDL_RWops *VirtFs::RWopsOpenRead(const std::string &restrict fname)
+#endif  // DEBUG_VIRTFS
+{
+    BLOCK_START("RWopsopenRead")
+#ifdef __APPLE__
+    if (!checkFilePath(fname))
+        return nullptr;
+#endif  // __APPLE__
+#ifdef USE_FUZZER
+    if (Fuzzer::conditionTerminate(fname))
+        return nullptr;
+#endif  // USE_FUZZER
+#ifdef USE_PROFILER
+
+#ifdef DEBUG_VIRTFS
+    SDL_RWops *const ret = addDebugRWops(
+        create_rwops(VirtFs::openRead(fname)),
+        fname,
+        file,
+        line);
+#else  // DEBUG_VIRTFS
+    SDL_RWops *const ret = create_rwops(VirtFs::openRead(fname));
+#endif  // DEBUG_VIRTFS
+
+    BLOCK_END("RWopsopenRead")
+    return ret;
+#else  // USE_PROFILER
+
+#ifdef DEBUG_VIRTFS
+    return addDebugRWops(
+        create_rwops(VirtFs::openRead(fname)),
+        fname,
+        file,
+        line);
+#else  // DEBUG_VIRTFS
+    return create_rwops(VirtFs::openRead(fname));
+#endif  // DEBUG_VIRTFS
+#endif  // USE_PROFILER
+} /* RWopsopenRead */
+
+SDL_RWops *VirtFs::RWopsOpenWrite(const std::string &restrict fname)
+{
+#ifdef __APPLE__
+    if (!checkFilePath(fname))
+        return nullptr;
+#endif  // __APPLE__
+
+    return create_rwops(VirtFs::openWrite(fname));
+} /* RWopsopenWrite */
+
+SDL_RWops *VirtFs::RWopsOpenAppend(const std::string &restrict fname)
+{
+#ifdef __APPLE__
+    if (!checkFilePath(fname))
+        return nullptr;
+#endif  // __APPLE__
+
+    return create_rwops(VirtFs::openAppend(fname));
+} /* RWopsopenAppend */
+
+#ifdef DUMP_LEAKED_RESOURCES
+void VirtFs::reportRWops()
+{
+    if (openedRWops)
+    {
+        logger->assertLog("virtfsrwops_seek: leaking RWops: %d",
+            openedRWops);
+    }
+}
+#endif  // DUMP_LEAKED_RESOURCES
+
+/* end of virtfsrwops.c ... */