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Diffstat (limited to 'gsl-1.9/ntuple/ntuple.c')
| -rw-r--r-- | gsl-1.9/ntuple/ntuple.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/gsl-1.9/ntuple/ntuple.c b/gsl-1.9/ntuple/ntuple.c new file mode 100644 index 0000000..5055a8c --- /dev/null +++ b/gsl-1.9/ntuple/ntuple.c @@ -0,0 +1,202 @@ +/* histogram/ntuple.c + * + * Copyright (C) 2000 Simone Piccardi + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or (at + * your option) any later version. + * + * This program 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 + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +/* Jan/2001 Modified by Brian Gough. Minor changes for GSL */ + +#include <config.h> +#include <errno.h> +#include <gsl/gsl_errno.h> +#include <gsl/gsl_ntuple.h> + +/* + * gsl_ntuple_open: + * Initialize an ntuple structure and create the related file + */ + +gsl_ntuple * +gsl_ntuple_create (char *filename, void *ntuple_data, size_t size) +{ + gsl_ntuple *ntuple = (gsl_ntuple *)malloc (sizeof (gsl_ntuple)); + + if (ntuple == 0) + { + GSL_ERROR_VAL ("failed to allocate space for ntuple struct", + GSL_ENOMEM, 0); + } + + ntuple->ntuple_data = ntuple_data; + ntuple->size = size; + + ntuple->file = fopen (filename, "wb"); + + if (ntuple->file == 0) + { + free (ntuple); + GSL_ERROR_VAL ("unable to create ntuple file", GSL_EFAILED, 0); + } + + return ntuple; +} + +/* + * gsl_ntuple_open: + * Initialize an ntuple structure and open the related file + */ + +gsl_ntuple * +gsl_ntuple_open (char *filename, void *ntuple_data, size_t size) +{ + gsl_ntuple *ntuple = (gsl_ntuple *)malloc (sizeof (gsl_ntuple)); + + if (ntuple == 0) + { + GSL_ERROR_VAL ("failed to allocate space for ntuple struct", + GSL_ENOMEM, 0); + } + + ntuple->ntuple_data = ntuple_data; + ntuple->size = size; + + ntuple->file = fopen (filename, "rb"); + + if (ntuple->file == 0) + { + free (ntuple); + GSL_ERROR_VAL ("unable to open ntuple file for reading", + GSL_EFAILED, 0); + } + + return ntuple; +} + +/* + * gsl_ntuple_write: + * write to file a data row, must be used in a loop! + */ + +int +gsl_ntuple_write (gsl_ntuple * ntuple) +{ + size_t nwrite; + + nwrite = fwrite (ntuple->ntuple_data, ntuple->size, + 1, ntuple->file); + + if (nwrite != 1) + { + GSL_ERROR ("failed to write ntuple entry to file", GSL_EFAILED); + } + + return GSL_SUCCESS; +} + +/* the following function is a synonym for gsl_ntuple_write */ + +int +gsl_ntuple_bookdata (gsl_ntuple * ntuple) +{ + return gsl_ntuple_write (ntuple); +} + +/* + * gsl_ntuple_read: + * read form file a data row, must be used in a loop! + */ + +int +gsl_ntuple_read (gsl_ntuple * ntuple) +{ + size_t nread; + + nread = fread (ntuple->ntuple_data, ntuple->size, 1, ntuple->file); + + if (nread == 0 && feof(ntuple->file)) + { + return GSL_EOF; + } + + if (nread != 1) + { + GSL_ERROR ("failed to read ntuple entry from file", GSL_EFAILED); + } + + return GSL_SUCCESS; +} + +/* + * gsl_ntuple_project: + * fill an histogram with an ntuple file contents, use + * SelVal and SelFunc user defined functions to get + * the value to book and the selection funtion + */ + +#define EVAL(f,x) ((*((f)->function))(x,(f)->params)) + +int +gsl_ntuple_project (gsl_histogram * h, gsl_ntuple * ntuple, + gsl_ntuple_value_fn * value_func, + gsl_ntuple_select_fn * select_func) +{ + size_t nread; + + do + { + nread = fread (ntuple->ntuple_data, ntuple->size, + 1, ntuple->file); + + if (nread == 0 && feof(ntuple->file)) + { + break ; + } + + if (nread != 1) + { + GSL_ERROR ("failed to read ntuple for projection", GSL_EFAILED); + } + + if (EVAL(select_func, ntuple->ntuple_data)) + { + gsl_histogram_increment (h, EVAL(value_func, ntuple->ntuple_data)); + } + } + while (1); + + return GSL_SUCCESS; +} + + +/* + * gsl_ntuple_close: + * close the ntuple file and free the memory + */ + +int +gsl_ntuple_close (gsl_ntuple * ntuple) +{ + int status = fclose (ntuple->file); + + if (status) + { + GSL_ERROR ("failed to close ntuple file", GSL_EFAILED); + } + + free (ntuple); + + return GSL_SUCCESS; +} |