readgrd.cpp File Reference

#include <stdio.h>
#include "gridutil.h"

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Classes
class	gridgenGrdFormatter
	Abstracts the file format of a gridgen .grd file. More...
class	gridgenAsciiFormatter
	ASCII format input file: More...
class	gridgenBinaryFormatter< coordT >
	Machine binary input file: More...
class	gridgenBinaryFloatFormatter
class	gridgenBinaryDoubleFormatter

Typedefs
typedef int	grdb_int_t
typedef double	grdb_coord_t

Functions
static const char *	readInt (FILE *f, int *dest)
static const char *	readDouble (FILE *f, double *dest)
const char *	read_general (const char *gridFile, gridgenGrdFormatter &fmt, blockConsumer &dest)
const char *	read_grd (const char *gridFile, blockConsumer &dest)
const char *	read_grds (const char *gridFile, blockConsumer &dest)
const char *	read_grdd (const char *gridFile, blockConsumer &dest)

Typedef Documentation

typedef double grdb_coord_t

Definition at line 84 of file readgrd.cpp.

typedef int grdb_int_t

Definition at line 83 of file readgrd.cpp.

Function Documentation

const char* read_general	(	const char *	gridFile,
		gridgenGrdFormatter &	fmt,
		blockConsumer &	dest
	)

Definition at line 152 of file readgrd.cpp.

References blockConsumer::allocateBlock(), blockConsumer::consume(), cimg_library::cimg::fclose(), cimg_library::cimg::fopen(), blockConsumer::freeBlock(), blockDim::getSize(), i, gridgenGrdFormatter::readDouble(), gridgenGrdFormatter::readInt(), and gridgenGrdFormatter::setFile().

Referenced by read_grd(), read_grdd(), and read_grds().

{
        const char *err;
        //Open the input file
        FILE *f=fopen(gridFile,"r");
        if (f==NULL) return "Couldn't open input .grd file";
        fmt.setFile(f);

        //Read the header
        int nBlocks=0;
        if (NULL!=(err=fmt.readInt(&nBlocks))) return err;

        //Read the block sizes
        blockDim *dims=new blockDim[nBlocks];
        int b;
        for (b=0;b<nBlocks;b++) { 
                int nx,ny,nz;
                if (NULL!=(err=fmt.readInt(&nx))) return err;
                if (NULL!=(err=fmt.readInt(&ny))) return err;
                if (NULL!=(err=fmt.readInt(&nz))) return err;
                dims[b]=blockDim(nx,ny,nz);
        }
        
        //Read and consume each block's coordinates
        for (b=0;b<nBlocks;b++) {
                int nLocs=dims[b].getSize();
                vector3d *locs=dest.allocateBlock(dims[b]);
                for (int c=0;c<3;c++) //*outer* loop is coordinate axis
                  for (int i=0;i<nLocs;i++) {//*inner* loop is location #
                        double loc;
                        if (NULL!=(err=fmt.readDouble(&loc))) return err;
                        locs[i][c]=loc;
                  }
                if (NULL!=(err=dest.consume(dims[b],locs))) return err;
                dest.freeBlock(locs);
        }               
        
        //Finish up
        delete[] dims;
        fclose(f);
        return NULL; //Everything worked
}

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const char* read_grd	(	const char *	gridFile,
		blockConsumer &	dest
	)

Definition at line 196 of file readgrd.cpp.

References read_general().

Referenced by read_file().

{
        gridgenAsciiFormatter fmt;
        return read_general(gridFile,fmt,dest);
}

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const char* read_grdd	(	const char *	gridFile,
		blockConsumer &	dest
	)

Definition at line 206 of file readgrd.cpp.

References read_general().

Referenced by read_file().

{
        gridgenBinaryDoubleFormatter fmt;
        return read_general(gridFile,fmt,dest);
}

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const char* read_grds	(	const char *	gridFile,
		blockConsumer &	dest
	)

Definition at line 201 of file readgrd.cpp.

References read_general().

Referenced by read_file().

{
        gridgenBinaryFloatFormatter fmt;
        return read_general(gridFile,fmt,dest);
}

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static const char* readDouble ( FILE *  f, double *  dest  )

static

Definition at line 96 of file readgrd.cpp.

References cimg_library::cimg::fread().

                                                    {
        grdb_coord_t g;
        if (1!=fread(&g,sizeof(g),1,f))
                return "Error reading coordinate from .grdb file";
        *dest=g;
        return NULL;
}

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static const char* readInt ( FILE *  f, int *  dest  )

static

Definition at line 87 of file readgrd.cpp.

References cimg_library::cimg::fread().

                                              {
        grdb_int_t g;
        if (1!=fread(&g,sizeof(g),1,f))
                return "Error reading integer from .grdb file";
        *dest=g;
        return NULL;
}

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