env.cc

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/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/base/env.cc,v 1.38 2017/01/12 14:46:09 masarati Exp $ */
/*
 * MBDyn (C) is a multibody analysis code.
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 * Paolo Mantegazza     <mantegazza@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * 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 (version 2 of the License).
 *
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "mbconfig.h"           /* This goes first in every *.c,*.cc file */

#include <sstream>

#include <unistd.h>
#include <cerrno>
#include <cstdlib>
#include <cstdio>
#include <cstring>

#include "ac/f2c.h"
#include "mathp.h"

/* environment */
extern char **environ;

static const char MBDYNPREFIX[] = "MBDYN";

extern void GetEnviron(MathParser& MP);

void
GetEnviron(MathParser& MP)
{
        // cerca la variabile MBDYNVARS
        std::string MBDYNVARS = std::string(MBDYNPREFIX) + "VARS";
        char* e = getenv(MBDYNVARS.c_str());
        if (e != NULL) {
                DEBUGCOUT("GetEnv: reading variable <" << e << ">" << std::endl);
                std::istringstream in(e);
                InputStream In(in);
                MP.GetLastStmt(In);
                DEBUGCOUT("GetEnv: variable <" << e << "> read" << std::endl);
        }

        /* cerca le variabili definite singolarmente */
        Table& T = MP.GetSymbolTable();
        char** env = environ;
        while (*env) {
                if (strncmp(*env, MBDYNPREFIX, STRLENOF(MBDYNPREFIX)) == 0) {
                        DEBUGCOUT("reading var <" << *env << ">" << std::endl);
                        char* p = NULL;
                        char* v = NULL;
                        char* n = NULL;

                        SAFESTRDUP(p, *env);
                        v = std::strchr(p, '=');
                        if (v == NULL) {
                                silent_cerr("parse error in envvar <"
                                        << p << ">" << std::endl);
                                SAFEDELETEARR(p);
                                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                        }

                        *v = '\0';
                        v++;

                        if (strcmp(p, "MBDYNVARS") == 0) {
                                NO_OP;

                        } else if (strncmp(p, "MBDYN_real_", STRLENOF("MBDYN_real_")) == 0) {
                                n = p + STRLENOF("MBDYN_real_");
                                char *endptr = NULL;
                                errno = 0;
                                doublereal d = strtod(v, &endptr);
                                int save_errno = errno;
                                if (endptr != NULL && endptr[0] != '\0') {
                                        silent_cerr("SetEnv: unable to parse "
                                                        "real <" << v << "> "
                                                        "for var <" << p << ">"
                                                        << std::endl);
                                        SAFEDELETEARR(p);
                                        throw ErrGeneric(MBDYN_EXCEPT_ARGS);

                                } else if (save_errno == ERANGE) {
                                        silent_cerr("SetEnv: real <" << v << "> "
                                                "for var <" << p << "> overflows"
                                                << std::endl);
                                        SAFEDELETEARR(p);
                                        throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                                }
                                DEBUGCOUT("setting real var <"
                                        << n << "=" << d << ">" << std::endl);

                                if ((T.Get(n)) == NULL) {
                                        if (T.Put(n, Real(d))  == NULL) {
                                                silent_cerr("SetEnv:"
                                                        " error in insertion"
                                                        " of real symbol <"
                                                        << n << ">" << std::endl);
                                                SAFEDELETEARR(p);
                                                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                                        }
                                }

                        } else if (strncmp(p, "MBDYN_integer_", STRLENOF("MBDYN_integer_")) == 0) {
                                n = p + STRLENOF("MBDYN_integer_");
#ifdef HAVE_STRTOL
                                char *endptr = NULL;
                                errno = 0;
                                long i = strtol(v, &endptr, 10);
                                int save_errno = errno;
                                if (endptr != NULL && endptr[0] != '\0') {
                                        silent_cerr("SetEnv: unable to parse "
                                                "integer <" << v << "> "
                                                "for var <" << p << ">"
                                                << std::endl);
                                        SAFEDELETEARR(p);
                                        throw ErrGeneric(MBDYN_EXCEPT_ARGS);

                                } else if (save_errno == ERANGE) {
                                        silent_cerr("SetEnv: integer <" << v << "> "
                                                "for var <" << p << "> overflows"
                                                << std::endl);
                                        SAFEDELETEARR(p);
                                        throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                                }
#else /* !HAVE_STRTOL */
                                i = atol(v);
#endif /* !HAVE_STRTOL */
                                DEBUGCOUT("setting integer var <"
                                        << n << "=" << i << ">" << std::endl);

                                if ((T.Get(n)) == NULL) {
                                        if (T.Put(n, Int(i))  == NULL) {
                                                silent_cerr("SetEnv:"
                                                        " error in insertion"
                                                        " of integer symbol <"
                                                        << n << ">" << std::endl);
                                                SAFEDELETEARR(p);
                                                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                                        }
                                }

                        } else if (strncmp(p, "MBDYN_string_", STRLENOF("MBDYN_string_")) == 0) {
                                n = p + STRLENOF("MBDYN_string_");
                                if ((T.Get(n)) == NULL) {
                                        if (T.Put(n, TypedValue(std::string(v)))  == NULL) {
                                                silent_cerr("SetEnv:"
                                                        " error in insertion"
                                                        " of string symbol <"
                                                        << n << ">" << std::endl);
                                                SAFEDELETEARR(p);
                                                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
                                        }
                                }

                        } else {
                                silent_cerr("unknown var type <"
                                        << p << ">; skipping ..." << std::endl);
                        }

                        SAFEDELETEARR(p);
                }
                env++;
        }

        /* altro ... */
}