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Implement opening for append in DirectoryFileSystem. Add more non-Windows access modes.

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This commit is contained in:
KentuckyCompass 2012-12-27 03:24:21 -08:00
parent a0e1ab1181
commit 3839179a09
1 changed files with 29 additions and 1 deletions
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30
Core/FileSystems/DirectoryFileSystem.cpp
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@ -106,6 +106,7 @@ u32 DirectoryFileSystem::OpenFile(std::string filename, FileAccess access) {
OpenFileEntry entry;
//TODO: tests, should append seek to end of file? seeking in a file opened for append?
#ifdef _WIN32
// Convert parameters to Windows permissions and access
DWORD desired = 0;
@ -127,8 +128,35 @@ u32 DirectoryFileSystem::OpenFile(std::string filename, FileAccess access) {
//Let's do it!
entry.hFile = CreateFile(fullName.c_str(), desired, sharemode, 0, openmode, 0, 0);
bool success = entry.hFile != INVALID_HANDLE_VALUE;
if (success && (access & FILEACCESS_APPEND)) {
SetFilePointer(entry.hFile, 0, NULL, FILE_END);
}
#else
entry.hFile = fopen(fullName.c_str(), access & FILEACCESS_WRITE ? "wb" : "rb");
// Convert flags in access parameter to fopen access mode
const char *mode = NULL;
if (access & FILEACCESS_APPEND) {
if (access & FILEACCESS_READ)
mode = "ab+"; // append+read, create if needed
else
mode = "ab"; // append only, create if needed
} else if (access & FILEACCESS_WRITE) {
if (access & FILEACCESS_READ) {
// FILEACCESS_CREATE is ignored for read only, write only, and append
// because C++ standard fopen's nonexistant file creation can only be
// customized for files opened read+write
if (access & FILEACCESS_CREATE)
mode = "wb+"; // read+write, create if needed
else
mode = "rb+"; // read+write, but don't create
} else {
mode = "wb"; // write only, create if needed
}
} else { // neither write nor append, so default to read only
mode = "rb";
}
entry.hFile = fopen(fullName.c_str(), mode);
bool success = entry.hFile != 0;
#endif