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authorAndrei Karas <akaras@inbox.ru>2017-05-05 18:36:11 +0300
committerAndrei Karas <akaras@inbox.ru>2017-05-05 18:36:11 +0300
commitf0683382ed9ba3d2cbc9e3ef2018049b6e2c3d63 (patch)
tree81f7a29656068ae8b11f574ce943ad39b643d6e3 /src/fs/virtfs/fsdirrwops.cpp
parent35c8306fb26c2989dfff71b9769b1658f34e6afa (diff)
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Rename virtfsdirrwops into fsdirrwops.
Diffstat (limited to 'src/fs/virtfs/fsdirrwops.cpp')
-rw-r--r--src/fs/virtfs/fsdirrwops.cpp256
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