int read_first_frame(const output_env_t oenv, t_trxstatus **status,
const char *fn, t_trxframe *fr, int flags)
{
t_fileio *fio;
gmx_bool bFirst, bOK;
int dummy = 0;
clear_trxframe(fr, TRUE);
fr->flags = flags;
bFirst = TRUE;
snew((*status), 1);
status_init( *status );
(*status)->nxframe = 1;
initcount(*status);
fio = (*status)->fio = gmx_fio_open(fn, "r");
switch (gmx_fio_getftp(fio))
{
case efTRJ:
case efTRR:
break;
case efCPT:
read_checkpoint_trxframe(fio, fr);
bFirst = FALSE;
break;
case efG96:
/* Can not rewind a compressed file, so open it twice */
if (!(*status)->persistent_line)
{
/* allocate the persistent line */
snew((*status)->persistent_line, STRLEN+1);
}
read_g96_conf(gmx_fio_getfp(fio), fn, fr, (*status)->persistent_line);
gmx_fio_close(fio);
clear_trxframe(fr, FALSE);
if (flags & (TRX_READ_X | TRX_NEED_X))
{
snew(fr->x, fr->natoms);
}
if (flags & (TRX_READ_V | TRX_NEED_V))
{
snew(fr->v, fr->natoms);
}
fio = (*status)->fio = gmx_fio_open(fn, "r");
break;
case efG87:
fr->natoms = xyz_first_x(*status, gmx_fio_getfp(fio), oenv, &fr->time,
&fr->x, fr->box);
if (fr->natoms)
{
fr->bTime = TRUE;
fr->bX = TRUE;
fr->bBox = TRUE;
printcount(*status, oenv, fr->time, FALSE);
}
bFirst = FALSE;
break;
case efXTC:
if (read_first_xtc(fio, &fr->natoms, &fr->step, &fr->time, fr->box, &fr->x,
&fr->prec, &bOK) == 0)
{
if (bOK)
{
gmx_fatal(FARGS, "No XTC!\n");
}
else
{
fr->not_ok = DATA_NOT_OK;
}
}
if (fr->not_ok)
{
fr->natoms = 0;
printincomp(*status, fr);
}
else
{
fr->bPrec = (fr->prec > 0);
fr->bStep = TRUE;
fr->bTime = TRUE;
fr->bX = TRUE;
fr->bBox = TRUE;
printcount(*status, oenv, fr->time, FALSE);
}
bFirst = FALSE;
break;
case efPDB:
pdb_first_x(*status, gmx_fio_getfp(fio), fr);
if (fr->natoms)
{
printcount(*status, oenv, fr->time, FALSE);
}
bFirst = FALSE;
break;
case efGRO:
if (gro_first_x_or_v(gmx_fio_getfp(fio), fr))
{
printcount(*status, oenv, fr->time, FALSE);
}
bFirst = FALSE;
break;
default:
#ifdef GMX_USE_PLUGINS
fprintf(stderr, "The file format of %s is not a known trajectory format to GROMACS.\n"
"Please make sure that the file is a trajectory!\n"
"GROMACS will now assume it to be a trajectory and will try to open it using the VMD plug-ins.\n"
"This will only work in case the VMD plugins are found and it is a trajectory format supported by VMD.\n", fn);
gmx_fio_fp_close(fio); /*only close the file without removing FIO entry*/
if (!read_first_vmd_frame(fn, fr))
{
gmx_fatal(FARGS, "Not supported in read_first_frame: %s", fn);
}
#else
gmx_fatal(FARGS, "Not supported in read_first_frame: %s. Please make sure that the file is a trajectory.\n"
"GROMACS is not compiled with plug-in support. Thus it cannot read non-GROMACS trajectory formats using the VMD plug-ins.\n"
"Please compile with plug-in support if you want to read non-GROMACS trajectory formats.\n", fn);
#endif
break;
}
/* Return FALSE if we read a frame that's past the set ending time. */
if (!bFirst && (!(fr->flags & TRX_DONT_SKIP) && check_times(fr->time) > 0))
{
fr->t0 = fr->time;
return FALSE;
}
if (bFirst ||
(!(fr->flags & TRX_DONT_SKIP) && check_times(fr->time) < 0))
{
/* Read a frame when no frame was read or the first was skipped */
if (!read_next_frame(oenv, *status, fr))
{
return FALSE;
}
}
fr->t0 = fr->time;
return (fr->natoms > 0);
}
int read_first_frame(const output_env_t oenv,t_trxstatus **status,
const char *fn,t_trxframe *fr,int flags)
{
t_fileio *fio;
gmx_bool bFirst,bOK;
int dummy=0;
clear_trxframe(fr,TRUE);
fr->flags = flags;
bFirst = TRUE;
snew((*status), 1);
status_init( *status );
(*status)->nxframe=1;
initcount(*status);
fio = (*status)->fio =gmx_fio_open(fn,"r");
switch (gmx_fio_getftp(fio))
{
case efTRJ:
case efTRR:
break;
case efCPT:
read_checkpoint_trxframe(fio,fr);
bFirst = FALSE;
break;
case efG96:
/* Can not rewind a compressed file, so open it twice */
read_g96_conf(gmx_fio_getfp(fio),fn,fr);
gmx_fio_close(fio);
clear_trxframe(fr,FALSE);
if (flags & (TRX_READ_X | TRX_NEED_X))
snew(fr->x,fr->natoms);
if (flags & (TRX_READ_V | TRX_NEED_V))
snew(fr->v,fr->natoms);
fio = (*status)->fio =gmx_fio_open(fn,"r");
break;
case efG87:
fr->natoms=xyz_first_x(*status, gmx_fio_getfp(fio),oenv,&fr->time,
&fr->x,fr->box);
if (fr->natoms) {
fr->bTime = TRUE;
fr->bX = TRUE;
fr->bBox = TRUE;
printcount(*status,oenv,fr->time,FALSE);
}
bFirst = FALSE;
break;
case efXTC:
if (read_first_xtc(fio,&fr->natoms,&fr->step,&fr->time,fr->box,&fr->x,
&fr->prec,&bOK) == 0) {
if (bOK) {
gmx_fatal(FARGS,"No XTC!\n");
} else {
fr->not_ok = DATA_NOT_OK;
}
}
if (fr->not_ok) {
fr->natoms = 0;
printincomp(*status,fr);
} else {
fr->bPrec = (fr->prec > 0);
fr->bStep = TRUE;
fr->bTime = TRUE;
fr->bX = TRUE;
fr->bBox = TRUE;
printcount(*status,oenv,fr->time,FALSE);
}
bFirst = FALSE;
break;
case efPDB:
pdb_first_x(*status, gmx_fio_getfp(fio),fr);
if (fr->natoms)
printcount(*status,oenv,fr->time,FALSE);
bFirst = FALSE;
break;
case efGRO:
if (gro_first_x_or_v(gmx_fio_getfp(fio),fr))
printcount(*status,oenv,fr->time,FALSE);
bFirst = FALSE;
break;
default:
#ifdef GMX_DLOPEN
gmx_fio_fp_close(fio); /*only close the file without removing FIO entry*/
if (!read_first_vmd_frame(&dummy,fn,fr,flags))
{
gmx_fatal(FARGS,"Not supported in read_first_frame: %s",fn);
}
#else
gmx_fatal(FARGS,"Not supported in read_first_frame: %s",fn);
#endif
break;
}
/* Return FALSE if we read a frame that's past the set ending time. */
if (!bFirst && (!(fr->flags & TRX_DONT_SKIP) && check_times(fr->time) > 0)) {
fr->t0 = fr->time;
return FALSE;
}
if (bFirst ||
(!(fr->flags & TRX_DONT_SKIP) && check_times(fr->time) < 0))
/* Read a frame when no frame was read or the first was skipped */
if (!read_next_frame(oenv,*status,fr))
return FALSE;
fr->t0 = fr->time;
return (fr->natoms > 0);
}
