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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "engine.h"
#define BUFSIZE 8192
#define NaN (0.0/0.0) /* Anyone know a better way? */
static void convertToDouble(float *data, double *ddata, float bad_flag,
int ysize, int zsize, int maxy, int maxz);
static void convertToFloat(double *ddata, float *data, float bad_flag,
int ysize, int zsize, int maxy, int maxz);
static Engine *ep = 0;
int matlab_func_demo_(int *getFunction,
float *sal, float *temp, float *pres, float *res,
int *ysize, int *zsize, float *bad_flag,
int *maxy, int *maxz){
mxArray *mSal = NULL, *mTemp = NULL, *mPres = NULL, *mRes = NULL;
double *dSal, *dTemp, *dPres, *dRes;
char buffer[BUFSIZE], cbuffer[BUFSIZE];
int size = *ysize * *zsize;
static int choice = 0;
/* Open MATLAB engine */
if (ep == 0){
if (!(ep = engOpen("\0"))) {
fprintf(stderr, "\nCan't start MATLAB engine\n");
return EXIT_FAILURE;
}
}
/* Set up the MATLAB output buffer */
engOutputBuffer(ep, buffer, BUFSIZE);
mSal = mxCreateDoubleMatrix(*ysize, *zsize, mxREAL);
mxSetName(mSal, "SAL");
dSal = mxGetPr(mSal);
mTemp = mxCreateDoubleMatrix(*ysize, *zsize, mxREAL);
mxSetName(mTemp, "TEMP");
dTemp = mxGetPr(mTemp);
mPres = mxCreateDoubleMatrix(1, *zsize, mxREAL);
mxSetName(mPres, "PRES");
dPres = mxGetPr(mPres);
/* Convert from float->double */
convertToDouble(temp, dTemp, *bad_flag, *ysize, *zsize, *maxy, *maxz);
convertToDouble(sal, dSal, *bad_flag, *ysize, *zsize, *maxy, *maxz);
convertToDouble(pres, dPres, *bad_flag, *zsize, 1, *zsize, 1);
/* Place the variables into the MATLAB workspace */
engPutArray(ep, mSal);
engPutArray(ep, mPres);
engPutArray(ep, mTemp);
/* Get the function choice */
if (*getFunction){
choice = 0;
while (choice < 1 || choice > 5){
printf("1) sw_adtg (adiabatic temperature gradient)\n");
printf("2) sw_cndr (conductivity ratio)\n");
printf("3) sw_cp (heat capacity)\n");
printf("4) sw_dens (density)\n");
printf("5) sw_gpan (geopotential anomaly)\n");
printf("Select a function: ");
scanf("%d", &choice);
}
}
sprintf(cbuffer, "res = matlab_func_test(%d,SAL,TEMP,PRES);", choice);
engEvalString(ep, cbuffer);
/*
* Echo the output from the command. First two characters are
* always the double prompt (>>).
*/
if (strlen(buffer) > 1)
printf("%s", buffer+2);
/* Get the result array */
mRes = engGetArray(ep,"res");
assert(mRes);
dRes = mxGetPr(mRes);
convertToFloat(dRes, res, *bad_flag, *ysize , *zsize, *maxy, *maxz);
mxDestroyArray(mSal);
mxDestroyArray(mPres);
mxDestroyArray(mTemp);
mxDestroyArray(mRes);
#if 0
engClose(ep);
#endif
return EXIT_SUCCESS;
}
static void convertToFloat(double *ddata, float *data, float bad_flag,
int ysize, int zsize, int maxy, int maxz)
{
int i=0,j,k;
for (k=0; k < zsize; ++k){
for (j=0; j < ysize; ++j){
double theData = ddata[i++];
int index = k * maxy + j;
if (isnan(theData)){
data[index] = bad_flag;
} else {
data[index] = theData;
}
#if 0
printf("Converting: %d %lf -> %f\n", i, theData, data[i]);
#endif
}
}
}
static void convertToDouble(float *data, double *ddata, float bad_flag,
int ysize, int zsize, int maxy, int maxz)
{
int i=0,j,k;
for (k=0; k < zsize; ++k){
for (j=0; j < ysize; ++j){
int index = k * maxy + j;
float theData = data[index];
if (theData == bad_flag){
ddata[i++] = NaN;
} else {
ddata[i++] = theData;
}
#if 0
printf("Converting: %d %f -> %lf\n", i-1, theData, ddata[i-1]);
#endif
}
}
}
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