Rename virtfsdirrwops into fsdirrwops.

1 files changed, 256 insertions, 0 deletions

diff --git a/src/fs/virtfs/fsdirrwops.cpp b/src/fs/virtfs/fsdirrwops.cpp
new file mode 100644
index 000000000..bebace2e1
--- /dev/null
+++ b/src/fs/virtfs/fsdirrwops.cpp
@@ -0,0 +1,256 @@
+/*
+ *  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/>.
+ */
+
+#include "fs/virtfs/fsdirrwops.h"
+
+#include "logger.h"
+
+#include "fs/virtfs/file.h"
+
+#include <SDL_rwops.h>
+
+#include "debug.h"
+
+namespace VirtFs
+{
+
+namespace FsDir
+{
+    RWOPSINT rwops_seek(SDL_RWops *const rw,
+                        const RWOPSINT offset,
+                        const int whence)
+    {
+        if (!rw)
+            return -1;
+        File *const handle = static_cast<File *const>(
+            rw->hidden.unknown.data1);
+        FILEHTYPE fd = handle->mFd;
+        RWOPSINT pos = 0;
+
+        if (whence == SEEK_SET)
+        {
+            pos = offset;
+        }
+        else if (whence == SEEK_CUR)
+        {
+#ifdef USE_FILE_FOPEN
+            const int64_t current = ftell(fd);
+#else  // USE_FILE_FOPEN
+            const int64_t current = lseek(fd, 0, SEEK_CUR);
+#endif  // USE_FILE_FOPEN
+
+            if (current == -1)
+            {
+                logger->assertLog(
+                    "VirtFs::rwops_seek: Can't find position in file.");
+                return -1;
+            }
+
+            pos = CAST_S32(current);
+            if (static_cast<int64_t>(pos) != current)
+            {
+                logger->assertLog("VirtFs::rwops_seek: "
+                    "Can't fit current file position in an int!");
+                return -1;
+            }
+
+            if (offset == 0)  /* this is a "tell" call. We're done. */
+                return pos;
+
+            pos += offset;
+        }
+        else if (whence == SEEK_END)
+        {
+            int64_t len = 0;
+#ifdef USE_FILE_FOPEN
+            const long curpos = ftell(fd);
+            fseek(fd, 0, SEEK_END);
+            len = ftell(fd);
+//            fseek(fd, curpos, SEEK_SET);
+#else  // USE_FILE_FOPEN
+            struct stat statbuf;
+            if (fstat(fd, &statbuf) == -1)
+            {
+                reportAlways("FsDir::fileLength error.");
+                len = -1;
+            }
+            else
+            {
+                len = static_cast<int64_t>(statbuf.st_size);
+            }
+#endif  // USE_FILE_FOPEN
+
+            if (len == -1)
+            {
+#ifdef USE_FILE_FOPEN
+                fseek(fd, curpos, SEEK_SET);
+#endif  // USE_FILE_FOPEN
+                logger->assertLog(
+                    "VirtFs::rwops_seek:Can't find end of file.");
+                return -1;
+            }
+
+            pos = static_cast<RWOPSINT>(len);
+            if (static_cast<int64_t>(pos) != len)
+            {
+#ifdef USE_FILE_FOPEN
+                fseek(fd, curpos, SEEK_SET);
+#endif  // USE_FILE_FOPEN
+                logger->assertLog("VirtFs::rwops_seek: "
+                    "Can't fit end-of-file position in an int!");
+                return -1;
+            }
+
+            pos += offset;
+        }
+        else
+        {
+            logger->assertLog(
+                "VirtFs::rwops_seek: Invalid 'whence' parameter.");
+            return -1;
+        }
+
+        if (pos < 0)
+        {
+            logger->assertLog("VirtFs::rwops_seek: "
+                "Attempt to seek past start of file.");
+            return -1;
+        }
+
+        const int64_t res = FILESEEK(fd, pos, SEEK_SET);
+        if (res == -1)
+        {
+            logger->assertLog("VirtFs::rwops_seek: seek error.");
+            return -1;
+        }
+
+        return pos;
+    }
+
+    RWOPSSIZE rwops_read(SDL_RWops *const rw,
+                         void *const ptr,
+                         const RWOPSSIZE size,
+                         const RWOPSSIZE maxnum)
+    {
+        if (!rw)
+            return 0;
+        File *const handle = static_cast<File *const>(
+            rw->hidden.unknown.data1);
+        FILEHTYPE fd = handle->mFd;
+
+#ifdef USE_FILE_FOPEN
+        const int64_t rc = fread(ptr, size, maxnum, fd);
+#else  // USE_FILE_FOPEN
+        int max = size * maxnum;
+        int cnt = ::read(fd, ptr, max);
+        if (cnt <= 0)
+            return cnt;
+        const int64_t rc = cnt / size;
+#endif  // USE_FILE_FOPEN
+
+        if (rc != static_cast<int64_t>(maxnum))
+        {
+#ifndef USE_FILE_FOPEN
+            const int64_t pos = lseek(fd, 0, SEEK_CUR);
+            struct stat statbuf;
+            if (fstat(fd, &statbuf) == -1)
+            {
+                reportAlways("FsDir::fileLength error.");
+                return CAST_S32(rc);
+            }
+#endif  // USE_FILE_FOPEN
+        }
+        return CAST_S32(rc);
+    }
+
+    RWOPSSIZE rwops_write(SDL_RWops *const rw,
+                          const void *const ptr,
+                          const RWOPSSIZE size,
+                          const RWOPSSIZE maxnum)
+    {
+        if (!rw)
+            return 0;
+        File *const handle = static_cast<File *const>(
+            rw->hidden.unknown.data1);
+        FILEHTYPE fd = handle->mFd;
+
+#ifdef USE_FILE_FOPEN
+        const int64_t rc = fwrite(ptr, size, maxnum, fd);
+#else  // USE_FILE_FOPEN
+        int max = size * maxnum;
+        int cnt = ::write(fd, ptr, max);
+        if (cnt <= 0)
+            return cnt;
+        const int64_t rc = cnt / size;
+#endif  // USE_FILE_FOPEN
+
+        if (rc != static_cast<int64_t>(maxnum))
+        {
+#ifndef USE_FILE_FOPEN
+            const int64_t pos = lseek(fd, 0, SEEK_CUR);
+            struct stat statbuf;
+            if (fstat(fd, &statbuf) == -1)
+            {
+                reportAlways("FsDir::fileLength error.");
+                return CAST_S32(rc);
+            }
+#endif  // USE_FILE_FOPEN
+        }
+        return CAST_S32(rc);
+    }
+
+    int rwops_close(SDL_RWops *const rw)
+    {
+        if (!rw)
+            return 0;
+        File *const handle = static_cast<File*>(
+            rw->hidden.unknown.data1);
+        delete handle;
+        SDL_FreeRW(rw);
+        return 0;
+    }
+
+#ifdef USE_SDL2
+    RWOPSINT rwops_size(SDL_RWops *const rw)
+    {
+        File *const handle = static_cast<File *const>(
+            rw->hidden.unknown.data1);
+        FILEHTYPE fd = handle->mFd;
+#ifdef USE_FILE_FOPEN
+        const long pos = ftell(fd);
+        fseek(fd, 0, SEEK_END);
+        const long sz = ftell(fd);
+        fseek(fd, pos, SEEK_SET);
+        return sz;
+#else  // USE_FILE_FOPEN
+        struct stat statbuf;
+        if (fstat(fd, &statbuf) == -1)
+        {
+            reportAlways("FsDir::fileLength error.");
+            return -1;
+        }
+        return static_cast<int64_t>(statbuf.st_size);
+#endif  // USE_FILE_FOPEN
+    }
+#endif  // USE_SDL2
+
+}  // namespace FsDir
+
+}  // namespace VirtFs