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CDVD: Use wxFFile API to handle NVM file 

Nicer, exception safe, less compilation warning :)

v2: check fp is properly open in write mode
This commit is contained in:
Gregory Hainaut 2016-08-15 12:54:12 +02:00
parent 5c7e2432bd
commit 534e01e2d6
1 changed files with 38 additions and 32 deletions
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70
pcsx2/CDVD/CDVD.cpp
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@ -122,63 +122,69 @@ static void cdvdGetMechaVer(u8* ver)
NVMLayout* getNvmLayout()
{
NVMLayout* nvmLayout = NULL;
if(nvmlayouts[1].biosVer <= BiosVersion)
nvmLayout = &nvmlayouts[1];
else
nvmLayout = &nvmlayouts[0];
return nvmLayout;
}
// Throws Exception::CannotCreateStream if the file cannot be opened for reading, or cannot
// be created for some reason.
FILE* _cdvdOpenNVM()
static void cdvdNVM(u8 *buffer, int offset, size_t bytes, bool read)
{
wxFileName nvmfile(EmuConfig.BiosFilename);
nvmfile.SetExt( L"nvm" );
const wxString fname( nvmfile.GetFullPath() );
nvmfile.SetExt(L"nvm");
const wxString fname(nvmfile.GetFullPath());
// if file doesn't exist, create empty one
FILE* fd = wxFopen(fname, L"r+b");
if (fd == NULL)
{
Console.Warning("NVM File Not Found, Creating Blank File");
fd = wxFopen(fname, L"wb");
if (fd == NULL)
// Likely a bad idea to go further
if (nvmfile.IsDir())
throw Exception::CannotCreateStream(fname);
if (Path::GetFileSize(fname) < 1024) {
Console.Warning("NVM File Not Found, creating substitute...");
wxFFile fp(fname, L"wb");
if (!fp.IsOpened())
throw Exception::CannotCreateStream(fname);
for (int i=0; i<1024; i++) fputc(0, fd);
u8 zero[1024] = {0};
fp.Write(zero, sizeof(zero));
//Write NVM ILink area with dummy data (Age of Empires 2)
NVMLayout* nvmLayout = getNvmLayout();
u8 ILinkID_Data[8] = { 0x00, 0xAC, 0xFF, 0xFF, 0xFF, 0xFF, 0xB9, 0x86 };
fseek(fd, *(s32*)(((u8*)nvmLayout)+offsetof(NVMLayout, ilinkId)), SEEK_SET);
fwrite(ILinkID_Data, 1, 8, fd);
fp.Seek(*(s32*)(((u8*)nvmLayout) + offsetof(NVMLayout, ilinkId)));
fp.Write(ILinkID_Data, sizeof(ILinkID_Data));
}
return fd;
wxFFile fp(fname, L"r+b");
if (!fp.IsOpened())
throw Exception::CannotCreateStream(fname);
fp.Seek(offset);
size_t ret;
if (read)
ret = fp.Read(buffer, bytes);
else
ret = fp.Write(buffer, bytes);
if (ret != bytes)
Console.Error(L"Failed to %s %s. Did only %zu/%zu bytes",
read ? L"read from" : L"write to", WX_STR(fname), ret, bytes);
}
//
// the following 'cdvd' functions all return 0 if successful
//
static void cdvdReadNVM(u8 *dst, int offset, int bytes) {
FILE* fd = _cdvdOpenNVM();
fseek(fd, offset, SEEK_SET);
fread(dst, 1, bytes, fd);
fclose(fd);
cdvdNVM(dst, offset, bytes, true);
}
static void cdvdWriteNVM(const u8 *src, int offset, int bytes) {
FILE* fd = _cdvdOpenNVM();
fseek(fd, offset, SEEK_SET);
fwrite(src, 1, bytes, fd);
fclose(fd);
cdvdNVM(const_cast<u8*>(src), offset, bytes, false);
}
void getNvmData(u8* buffer, s32 offset, s32 size, s32 fmtOffset)