/// Reads "size" bytes from the file, and dumps data into "dst".
/// The number of actual bytes read is returned in bytesRead
/// @returns The status of the file
File::Status read(U32 size, char *dst, U32 *bytesRead)
{
#ifdef DEBUG
// fprintf(stdout,"reading %d bytes\n",size);fflush(stdout);
#endif
AssertFatal(Closed != currentStatus, "File::read: file closed");
AssertFatal(NULL != handle, "File::read: invalid file handle");
AssertFatal(NULL != dst, "File::read: NULL destination pointer");
AssertFatal(true == hasCapability(FileRead), "File::read: file lacks capability");
AssertWarn(0 != size, "File::read: size of zero");
/* show stats for this file */
#ifdef DEBUG
//struct stat st;
//fstat(*((int *)handle), &st);
//fprintf(stdout,"file size = %d\n", st.st_size);
#endif
/****************************/
long lastBytes=0;
File::Status lastStatus = File::Ok;
if (Ok != currentStatus || 0 == size) {
lastStatus = currentStatus;
} else
{
long *bytes = &lastBytes;
if ( (*((U32 *)bytes) = x86UNIXRead(*((int *)handle), dst, size)) == -1)
{
#ifdef DEBUG
// fprintf(stdout,"unsuccessful: %d\n", *((U32 *)bytes));fflush(stdout);
#endif
setStatus(); // unsuccessful
lastStatus = currentStatus;
} else {
// dst[*((U32 *)bytes)] = '\0';
if (*((U32 *)bytes) != size || *((U32 *)bytes) == 0) {
#ifdef DEBUG
// fprintf(stdout,"end of stream: %d\n", *((U32 *)bytes));fflush(stdout);
#endif
currentStatus = EOS; // end of stream
lastStatus = currentStatus;
}
}
}
// dst[*bytesRead] = '\0';
#ifdef DEBUG
//fprintf(stdout, "We read:\n");
//fprintf(stdout, "====================================================\n");
//fprintf(stdout, "%s\n",dst);
//fprintf(stdout, "====================================================\n");
//fprintf(stdout,"read ok: %d\n", *bytesRead);fflush(stdout);
#endif
// if bytesRead is a valid pointer, put number of bytes read there.
if(bytesRead)
*bytesRead = lastBytes;
currentStatus = lastStatus;
return currentStatus; // successfully read size bytes
}
//------------------------------------------------------------------------------
// copy a file from src to dest
static bool CopyFile(const char* src, const char* dest)
{
S32 srcFd = x86UNIXOpen(src, O_RDONLY);
S32 destFd = x86UNIXOpen(dest, O_WRONLY | O_CREAT | O_TRUNC);
bool error = false;
if (srcFd != -1 && destFd != -1)
{
const int BufSize = 8192;
char buf[BufSize];
S32 bytesRead = 0;
while ((bytesRead = x86UNIXRead(srcFd, buf, BufSize)) > 0)
{
// write data
if (x86UNIXWrite(destFd, buf, bytesRead) == -1)
{
error = true;
break;
}
}
if (bytesRead == -1)
error = true;
}
if (srcFd != -1)
x86UNIXClose(srcFd);
if (destFd != -1)
x86UNIXClose(destFd);
if (error)
{
Con::errorf("Error copying file: %s, %s", src, dest);
remove(dest);
}
return error;
}
