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#if defined(_MSC_VER) /* MSVC Compiler */
#pragma warning ( disable : 4786 )
#endif
#include <float.h>
#include <stdio.h>
#include <qtextstream.h>
#include "qwt3d_surfaceplot.h"
#include "qwt3d_io_reader.h"
using namespace std;
using namespace Qwt3D;
const char* NativeReader::magicstring = "jk:11051895-17021986";
namespace
{
FILE* open(QString fname)
{
FILE* file = fopen(QWT3DLOCAL8BIT(fname), "r");
if (!file)
{
fprintf(stderr, "NativeReader::read: cannot open data file \"%s\"\n", QWT3DLOCAL8BIT(fname));
}
return file;
}
int read_char (FILE * fp, bool skipcomments = true)
{
int c;
if ((c = fgetc (fp)) == EOF)
return (c);
if (skipcomments)
{
if (c == '#')
{
do
{
if ((c = fgetc (fp)) == EOF)
return (c);
}
while (c != '\n' && c != '\r');
}
}
return (c);
}
char* read_field (FILE * fp, bool skipcomments = true)
{
static char buf[71];
int c, i;
do
{
if ((c = read_char (fp,skipcomments)) == EOF)
return (NULL);
}
while (isspace (c));
for (i = 0; i < 70 && !isspace (c); ++i)
{
buf[i] = c;
if ((c = read_char (fp,skipcomments)) == EOF)
break;
}
buf[i] = '\0';
return (buf);
}
//! set to data begin
bool extract_info(FILE* fp, unsigned int& xmesh, unsigned int& ymesh, double& xmin, double& xmax, double& ymin, double& ymax)
{
char* p;
// find out the size
if ((p = read_field (fp)) == 0)
return false;
xmesh = (unsigned int)atoi(p);
if ((p = read_field (fp)) == 0)
return false;
ymesh = (unsigned int)atoi (p);
if (xmesh < 1 || ymesh < 1)
return false;
// ... and the limits
if ((p = read_field (fp)) == 0)
return false;
xmin = atof (p);
if ((p = read_field (fp)) == 0)
return false;
xmax = atof (p);
if ((p = read_field (fp)) == 0)
return false;
ymin = atof (p);
if ((p = read_field (fp)) == 0)
return false;
ymax = atof (p);
if (xmin > xmax || ymin > ymax)
return false;
return true;
}
//! find out what the magic string is and compare
bool check_magic(FILE* fp, const char* val)
{
char* p;
if ((p = read_field (fp,false)) == 0)
return false;
if (strcmp (p, val ) != 0)
return false;
return true;
}
//! find out what the type is
bool check_type(FILE* fp, const char* val)
{
char* p;
if ((p = read_field (fp)) == 0)
return false;
if (strcmp (p, val ) != 0)
return false;
return true;
}
double** allocateData(int columns, int rows)
{
double** data = new double* [columns] ;
for ( int i = 0; i < columns; ++i)
{
data[i] = new double [rows];
}
return data;
}
void deleteData(double**data, int columns)
{
for ( int i = 0; i < columns; i++)
{
delete [] data[i];
}
delete [] data;
}
}
NativeReader::NativeReader()
: minz_(-DBL_MAX), maxz_(DBL_MAX)
{
}
bool NativeReader::collectInfo(FILE*& file, QString const& fname, unsigned& xmesh, unsigned& ymesh,
double& minx, double& maxx, double& miny, double& maxy)
{
if (fname.isEmpty())
return false;
file = open(fname);
if (!file)
return false;
if (
(!check_magic(file, magicstring))
||(!check_type(file, "MESH"))
||(!extract_info(file, xmesh, ymesh, minx, maxx, miny, maxy))
)
{
fclose(file);
return false;
}
return true;
}
bool NativeReader::operator()(Plot3D* plot, QString const& fname)
{
FILE* file;
unsigned int xmesh, ymesh;
double minx, maxx, miny, maxy;
if ( !collectInfo(file, fname, xmesh, ymesh, minx, maxx, miny, maxy) )
return false;
/* allocate some space for the mesh */
double** data = allocateData(xmesh, ymesh);
for (unsigned int j = 0; j < ymesh; j++)
{
for (unsigned int i = 0; i < xmesh; i++)
{
if (fscanf(file, "%lf", &data[i][j]) != 1)
{
fprintf(stderr, "NativeReader::read: error in data file \"%s\"\n", QWT3DLOCAL8BIT(fname));
return false;
}
if (data[i][j] > maxz_)
data[i][j] = maxz_;
else if (data[i][j] < minz_)
data[i][j] = minz_;
}
}
/* close the file */
fclose(file);
((SurfacePlot*)plot)->loadFromData(data, xmesh, ymesh, minx, maxx, miny, maxy);
deleteData(data,xmesh);
return true;
}
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