libmocha/source/devoptab/devoptab_fsa_truncate.cpp

39 lines
1.1 KiB
C++

#include "devoptab_fs.h"
#include "logger.h"
#include <mutex>
int __fsa_ftruncate(struct _reent *r,
void *fd,
off_t len) {
FSError status;
__fsa_file_t *file;
// Make sure length is non-negative
if (!fd || len < 0) {
r->_errno = EINVAL;
return -1;
}
// Set the new file size
file = (__fsa_file_t *) fd;
auto *deviceData = (FSADeviceData *) r->deviceData;
std::lock_guard<FastLockWrapper> lock(deviceData->mutex);
status = FSASetPosFile(deviceData->clientHandle, file->fd, len);
if (status < 0) {
DEBUG_FUNCTION_LINE_ERR("FSASetPosFile(0x%08X, 0x%08X, 0x%08X) failed: %s", deviceData->clientHandle, file->fd, len, FSAGetStatusStr(status));
r->_errno = __fsa_translate_error(status);
return -1;
}
status = FSATruncateFile(deviceData->clientHandle, file->fd);
if (status < 0) {
DEBUG_FUNCTION_LINE_ERR("FSATruncateFile(0x%08X, 0x%08X) failed: %s", deviceData->clientHandle, file->fd, FSAGetStatusStr(status));
r->_errno = __fsa_translate_error(status);
return -1;
}
return 0;
}