X-Git-Url: https://git.auder.net/?a=blobdiff_plain;f=src%2Fsources%2Futils%2Fioutils.c;fp=src%2Fsources%2Futils%2Fioutils.c;h=36a1d8e9705331323b8742e890893311d8787cdb;hb=493a35bfea6d1210c94ced8fbfe3e572f0389ea5;hp=0000000000000000000000000000000000000000;hpb=35b42a4bd37b162a3d579693b2b5fa4913a52ed5;p=valse.git

diff --git a/src/sources/utils/ioutils.c b/src/sources/utils/ioutils.c
new file mode 100644
index 0000000..36a1d8e
--- /dev/null
+++ b/src/sources/utils/ioutils.c
@@ -0,0 +1,168 @@
+#include "ioutils.h"
+#include <string.h>
+#include <stdio.h>
+
+// Check if array == refArray
+void compareArray(const char* ID, const void* array, const void* refArray, mwSize size, int isInteger)
+{
+	Real EPS = 1e-5; //precision
+	printf("Checking %s\n",ID);
+	Real maxError = 0.0;
+	for (mwSize i=0; i<size; i++)
+	{
+		Real error = isInteger
+			? fabs(((Int*)array)[i] - ((Int*)refArray)[i])
+			: fabs(((Real*)array)[i] - ((Real*)refArray)[i]);
+		if (error >= maxError)
+			maxError = error;
+	}
+	if (maxError >= EPS)
+		printf("    Inaccuracy: max(abs(error)) = %g >= %g\n",maxError,EPS);
+	else
+		printf("    OK\n");
+}
+
+// Next function is a generalization of :
+//~ Real* brToMatlabArray(Real* brArray, int dimX, int dimY, int dimZ, int dimW)
+//~ {
+	//~ Real* matlabArray = (Real*)malloc(dimX*dimY*dimZ*dimW*sizeof(Real));
+	//~ for (int u=0; u<dimX*dimY*dimZ*dimW; u++)
+	//~ {
+		//~ int xIndex = u / (dimY*dimZ*dimW);
+		//~ int yIndex = (u % (dimY*dimZ*dimW)) / (dimZ*dimW);
+		//~ int zIndex = (u % (dimZ*dimW)) / dimW;
+		//~ int wIndex = u % dimW;
+		//~ matlabArray[xIndex+yIndex*dimX+zIndex*dimX*dimY+wIndex*dimX*dimY*dimZ] = brArray[u];
+	//~ }
+	//~ return matlabArray;
+//~ }
+
+// Auxiliary to convert from ours ("by-rows") encoding to MATLAB
+void* brToMatlabArray(const void* brArray, const mwSize* dimensions, int nbDims, int isInteger)
+{
+	mwSize totalDim = 1;
+	for (int i=0; i<nbDims; i++)
+		totalDim *= dimensions[i];
+	size_t elementSize = isInteger
+		? sizeof(Int)
+		: sizeof(Real);
+	
+	void* matlabArray = malloc(totalDim*elementSize);
+	for (mwSize u=0; u<totalDim; u++)
+	{
+		mwSize prodDimLeft = totalDim;
+		mwSize prodDimRight = totalDim / dimensions[0];
+		mwSize prodDimInIndex = 1;
+		mwSize index = 0;
+		for (int v=0; v<nbDims; v++)
+		{
+			index += ((u % prodDimLeft) / prodDimRight) * prodDimInIndex;
+			prodDimInIndex *= dimensions[v];
+			prodDimLeft /= dimensions[v];
+			if (v+1 < nbDims)
+				prodDimRight /= dimensions[v+1];
+		}
+		if (isInteger)
+			((Int*)matlabArray)[index] = ((Int*)brArray)[u];
+		else
+			((Real*)matlabArray)[index] = ((Real*)brArray)[u];
+	}
+	return matlabArray;
+}
+
+// Next function is a generalization of :
+//~ Real* matlabToBrArray(Real* matlabArray, int dimX, int dimY, int dimZ, int dimU)
+//~ {
+	//~ Real* brArray = (Real*)malloc(dimX*dimY*dimZ*dimU*sizeof(Real));
+	//~ for (int u=0; u<dimX*dimY*dimZ*dimU; u++)
+	//~ {
+		//~ int xIndex = u % dimX;
+		//~ int yIndex = (u % (dimX*dimY)) / dimX;
+		//~ int zIndex = (u % (dimX*dimY*dimZ)) / (dimX*dimY);
+		//~ int uIndex = u / (dimX*dimY*dimZ);
+		//~ brArray[xIndex*dimY*dimZ*dimU+yIndex*dimZ*dimU+zIndex*dimU+uIndex] = matlabArray[u];
+	//~ }
+	//~ return brArray;
+//~ }
+
+// Auxiliary to convert from MATLAB encoding to ours ("by-rows")
+void* matlabToBrArray(const void* matlabArray, const mwSize* dimensions, int nbDims, int isInteger)
+{
+	mwSize totalDim = 1;
+	for (int i=0; i<nbDims; i++)
+		totalDim *= dimensions[i];
+	size_t elementSize = isInteger
+		? sizeof(Int)
+		: sizeof(Real);
+	
+	void* brArray = malloc(totalDim*elementSize);
+	for (mwSize u=0; u<totalDim; u++)
+	{
+		mwSize prodDimLeft = dimensions[0];
+		mwSize prodDimRight = 1;
+		mwSize prodDimInIndex = totalDim / dimensions[0];
+		mwSize index = 0;
+		for (int v=0; v<nbDims; v++)
+		{
+			index += ((u % prodDimLeft) / prodDimRight) * prodDimInIndex;
+			if (v+1 < nbDims)
+			{
+				prodDimInIndex /= dimensions[v+1];
+				prodDimLeft *= dimensions[v+1];
+			}
+			prodDimRight *= dimensions[v];
+		}
+		if (isInteger)
+			((Int*)brArray)[index] = ((Int*)matlabArray)[u];
+		else
+			((Real*)brArray)[index] = ((Real*)matlabArray)[u];
+	}
+	return brArray;
+}
+
+// Read array by columns (as in MATLAB) and return by-rows encoding
+void* readArray(const char* fileName, const mwSize* dimensions, int nbDims, int isInteger)
+{
+	// need to prepend '../data/' (not really nice code...)
+	char* fullFileName = (char*)calloc(8+strlen(fileName)+1,sizeof(char));
+	strcat(fullFileName, "../data/");
+	strcat(fullFileName, fileName);
+	FILE* file = fopen(fullFileName, "r");
+	free(fullFileName);
+	
+	mwSize totalDim = 1;
+	for (int i=0; i<nbDims; i++)
+		totalDim *= dimensions[i];
+	size_t elementSize = isInteger
+		? sizeof(Int)
+		: sizeof(Real);
+	
+	// read all values, and convert them to by-rows matrices format
+	void* matlabArray = malloc(totalDim*elementSize);
+	char curChar = ' ';
+	char bufferNum[64];
+	for (mwSize u=0; u<totalDim; u++)
+	{
+		// position to next non-separator character
+		while (!feof(file) && (curChar==' ' || curChar=='\n' || curChar=='\t' || curChar==','))
+			curChar = fgetc(file);
+		// read number (as a string)
+		int bufferIndex = 0;
+		while (!feof(file) && curChar!=' ' && curChar!='\n' && curChar!='\t' && curChar!=',')
+		{
+			bufferNum[bufferIndex++] = curChar;
+			curChar = fgetc(file);
+		}
+		bufferNum[bufferIndex] = 0;
+		// transform string into Real, and store it at appropriate location
+		if (isInteger)
+			((Int*)matlabArray)[u] = atoi(bufferNum);
+		else
+			((Real*)matlabArray)[u] = atof(bufferNum);
+	}
+	fclose(file);
+	
+	void* brArray = matlabToBrArray(matlabArray, dimensions, nbDims, isInteger);
+	free(matlabArray);
+	return brArray;
+}