/**
* 打开文件
* @param file 打开文件名
* @param flag 打开方式
* @return 0:成功 -1:失败
enum {
_OFM_READ = 0x0001,
_OFM_READWRITE = 0x0002,
_OFM_CREATE = 0x0004,
_OFM_APPEND = 0x0008
};
*/
int File::open(const char* file,
int flag)
{
if (_FileMgr == 0)
return -1;
_flag = flag;
if (SUCCESS != IFILEMGR_Test(_FileMgr, file))
{
_flag |= _OFM_CREATE;
}
else
{
_flag |= _OFM_APPEND;
}
_File = IFILEMGR_OpenFile(_FileMgr, file, _flag);
if (!_File)
{
_FileMgr = 0;
return -1;
}
if (_flag|_OFM_APPEND)
{
IFILE_Seek(_File,_SEEK_END,0);
}
return 0;
}
size_t sk_fread(void* buffer, size_t byteCount, SkFILE* f)
{
SkASSERT(f);
if (buffer == NULL)
{
int err = IFILE_Seek((IFile*)f, _SEEK_CURRENT, (int)byteCount);
if (err == EFAILED) {
SkDEBUGF(("sk_fread: IFILE_Seek(%d) failed returned:%d\n", byteCount, err));
return 0;
}
return byteCount;
}
else
return IFILE_Read((IFile*)f, buffer, byteCount);
}
bool sk_frewind(SkFILE* f)
{
SkASSERT(f);
return IFILE_Seek((IFile*)f, _SEEK_START, 0) == SUCCESS;
}
