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/* Copyright (C) 2013, 2015 D. V. Wiebe
*
***************************************************************************
*
* This file is part of the GetData project.
*
* GetData is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the
* Free Software Foundation; either version 2.1 of the License, or (at your
* option) any later version.
*
* GetData is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GetData; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "gd_matlab.h"
/*
% GD_FRAMENUM Reverse look-up on a field
%
% F = GD_FRAMENUM(DIRFILE,FIELD_CODE,VALUE[,START[,END]])
% performs a reverse look-up on the field FIELD_CODE, reporting the
% (fractional) frame number, F, where it takes on the value VALUE.
% If given and non-zero, only the portion of the field between
% START and END are considered.
%
% The DIRFILE object should have previously been created with GD_OPEN.
%
% See the documentation on the C API function gd_framenum_subset(3) in
% section 3 of the UNIX manual for more details.
%
% See also GD_BOF, GD_EOF, GD_OPEN, GD_GETDATA
*/
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
DIRFILE *D;
void *data;
char *field_code;
double r, value;
int64_t first_samp = 0, last_samp = 0;
GDMX_CHECK_RHS2(3,5);
D = gdmx_to_dirfile(prhs[0]);
field_code = gdmx_to_string(prhs, 1, 0);
value = gdmx_to_double(prhs, 2);
if (nrhs > 3)
first_samp = gdmx_to_int64(prhs, 3);
if (nrhs > 4)
last_samp = gdmx_to_int64(prhs, 4);
r = gd_framenum_subset64(D, field_code, value, first_samp, last_samp);
mxFree(field_code);
gdmx_err(D, 0);
plhs[0] = gdmx_from_double(r);
}
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