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/** @file features.cc
*
* Utility code for printing available features.
*/
/* #[ License : */
/*
* Copyright (C) 1984-2026 J.A.M. Vermaseren
* When using this file you are requested to refer to the publication
* J.A.M.Vermaseren "New features of FORM" math-ph/0010025
* This is considered a matter of courtesy as the development was paid
* for by FOM the Dutch physics granting agency and we would like to
* be able to track its scientific use to convince FOM of its value
* for the community.
*
* This file is part of FORM.
*
* FORM 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 3 of the License, or (at your option) any later
* version.
*
* FORM 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 FORM. If not, see <http://www.gnu.org/licenses/>.
*/
/* #] License : */
// #[ Includes :
extern "C" {
#include "form3.h"
}
#include <algorithm>
#include <string>
#include <vector>
#ifdef WITHFLINT
#include <flint/flint.h>
#endif
#ifdef WITHGMP
#include <gmp.h>
#endif
#ifdef WITHMPFR
#include <mpfr.h>
#endif
#ifdef WITHZLIB
#include <zlib.h>
#endif
#ifdef WITHZSTD
#include <zstd.h>
#endif
// #] Includes :
// #[ PrintFeatureList :
/**
* Prints a list of strings in multiple columns to fit within the line length.
*
* @param lines List of strings to print.
*/
static void PrintMulticolumn(const std::vector<std::string>& lines)
{
const std::size_t n_lines = lines.size();
if ( n_lines == 0 ) return;
const std::size_t line_len = AC.LineLength > 0 ? AC.LineLength : 79;
constexpr std::size_t max_cols = 6;
constexpr std::size_t col_spacing = 2;
std::vector<std::size_t> col_lens(max_cols);
for ( std::size_t n_cols = max_cols; n_cols >= 2; n_cols-- ) {
const std::size_t n_rows = (n_lines - 1) / n_cols + 1;
// Check whether `n_cols` columns fit within the line length.
// Columns are filled top-to-bottom, then left-to-right.
std::fill(col_lens.begin(),col_lens.begin()+n_cols,0);
std::size_t total_len = 0;
for ( std::size_t j = 0; j < n_cols; j++ ) {
for ( std::size_t i = 0; i < n_rows; i++ ) {
const std::size_t k = i + j * n_rows;
if ( k >= n_lines ) break;
col_lens[j] = std::max(col_lens[j],lines[k].size());
}
total_len += col_lens[j];
}
total_len += (n_cols - 1) * col_spacing;
if ( total_len > line_len ) continue;
// Output using `n_cols` columns.
std::string line;
line.reserve(line_len);
for ( std::size_t i = 0; i < n_rows; i++ ) {
line.clear();
for ( std::size_t j = 0; j < n_cols; j++ ) {
const std::size_t k = i + j * n_rows;
if ( k >= n_lines ) break;
line += lines[k];
if ( j < n_cols - 1 ) {
line += std::string(col_lens[j]-lines[k].size()+col_spacing,' ');
}
}
MesPrint("%s",line.c_str());
}
return;
}
// Fallback to a single column.
for ( const auto& f : lines ) {
MesPrint("%s",f.c_str());
}
}
/**
* Prints the list of available features.
*/
void PrintFeatureList(void)
{
std::vector<std::string> feature_list = {
#ifdef ENABLE_BACKTRACE
"+backtrace",
#else
"-backtrace",
#endif
#ifdef DEBUGGING
"+debugging",
#else
"-debugging",
#endif
#ifdef WITHFLINT
"+flint=" + std::string(flint_version),
#else
"-flint",
#endif
#ifdef WITHFLOAT
"+float",
#else
"-float",
#endif
#ifdef WITHGMP
"+gmp=" + std::string(gmp_version),
#else
"-gmp",
#endif
#ifdef WITHMPFR
"+mpfr=" + std::string(mpfr_get_version()),
#else
"-mpfr",
#endif
#ifdef WITHMPI
"+mpi",
#else
"-mpi",
#endif
#ifdef UNIX
"+posix",
#else
"-posix",
#endif
#ifdef WITHPTHREADS
"+pthreads",
#else
"-pthreads",
#endif
#ifdef WINDOWS
"+windows",
#else
"-windows",
#endif
#ifdef WITHZLIB
"+zlib=" + std::string(zlibVersion()),
#else
"-zlib",
#endif
#ifdef WITHZSTD
"+zstd=" + std::string(ZSTD_versionString()),
#else
"-zstd",
#endif
};
PrintMulticolumn(feature_list);
}
// #] PrintFeatureList :
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