The R Project SVN R

/*
 *  R : A Computer Langage for Statistical Data Analysis
 *  Copyright (C) 1995, 1996  Robert Gentleman and Ross Ihaka
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "Defn.h"

void jump_to_toplevel();
static void jump_now();

static int inError=0;

void onintr()
{
    REprintf("\n");
    jump_to_toplevel();
}

void warningcall(SEXP call, char *format,...)
{
    va_list(ap);
    char *dcall;
    dcall = CHAR(STRING(deparse1(call, 0))[0]);
    REprintf("Warning in %s : ", dcall);
    va_start(ap, format);
    REvprintf(format, ap);
    va_end(ap);
}
void warning(const char *format,...)
{
    va_list(ap);
    REprintf("Warning: ");
    va_start(ap, format);
    REvprintf(format, ap);
    va_end(ap);
}

void errorcall(SEXP call, char *format,...)
{
    va_list(ap);
    char *dcall;

    if(inError )
        jump_now();

    dcall = CHAR(STRING(deparse1(call, 0))[0]);
    REprintf("Error in %s : ", dcall);
    va_start(ap, format);
    REvprintf(format, ap);
    va_end(ap);
    jump_to_toplevel();
}

void error(const char *format, ...)
{
    va_list(ap);

    if( inError ) 
        jump_now();
    REprintf("Error: ");
    va_start(ap, format);
    REvprintf(format, ap);
    va_end(ap);
    jump_to_toplevel();
}

/* Unwind the call stack in an orderly fashion */
/* calling the code installed by on.exit along the way */
/* and finally longjmping to the top repl loop */

void jump_to_toplevel()
{
    RCNTXT *c;
    SEXP s, t;
    int nback=0;

    inError = 1;
    if (R_Console == 0) fclose(R_Inputfile);
#ifdef OLD
#else
    R_SetInput(0);
#endif
    ResetConsole();
    FlushConsole();
    R_ParseError = 0;
    ResetComment();
    vmaxset(NULL);
    if (R_GlobalContext->cend != NULL)
        (R_GlobalContext->cend) ();
    for (c = R_GlobalContext; c; c = c->nextcontext) {
        if (c->cloenv != R_NilValue && c->conexit != R_NilValue)
            eval(c->conexit, c->cloenv);
        if(c->callflag == CTXT_RETURN)
            nback++;
    }
    if (R_Sinkfile) R_Outputfile = R_Sinkfile;
    else R_Outputfile = R_Consolefile;

    PROTECT(s=allocList(nback));
    t=s;
    for( c = R_GlobalContext; c; c = c->nextcontext) 
        if(c->callflag == CTXT_RETURN) {
            CAR(t) = deparse1(c->call,0);
            t=CDR(t);
        }
    setVar(install(".Traceback"), s, R_GlobalEnv);
    UNPROTECT(1);

    jump_now();
}

void jump_now()
{
    inError=0;
    R_PPStackTop = 0;
    if(R_Interactive) longjmp(R_ToplevelContext->cjmpbuf, 0);
    else REprintf("Execution halted\n");
    exit(1);
}

#ifdef Macintosh

#include <signal.h>
#include <errno.h>

void isintrpt()
{
    register EvQElPtr q;

    for (q = (EvQElPtr) GetEvQHdr()->qHead; q; q = (EvQElPtr) q->qLink)
        if (q->evtQWhat == keyDown && (char) q->evtQMessage == '.')
            if (q->evtQModifiers & cmdKey) {
                FlushEvents(keyDownMask, 0);
                raise(SIGINT);
                /* errno = EINTR; */
                return;
            }
}
#endif

SEXP do_stop(SEXP call, SEXP op, SEXP args, SEXP rho)
{
    CAR(args) = coerceVector(CAR(args), STRSXP);
    if (length(CAR(args)) <= 0)
        error("\n");
    else
        error("%s\n", CHAR(STRING(CAR(args))[0]));
    /*NOTREACHED*/
}

SEXP do_warning(SEXP call, SEXP op, SEXP args, SEXP rho)
{
    if (CAR(args) != R_NilValue) {
        CAR(args) = coerceVector(CAR(args), STRSXP);
        warning("%s\n", CHAR(STRING(CAR(args))[0]));
    }
    else
        warning("%s\n", "");
    return CAR(args);
}

void  UNIMPLEMENTED(char *s)
{
    error("Unimplemented feature in %s\n", s);
}

static struct {
    int index;
    char*   format;
}
ErrorDB[] = {
    { ERROR_NUMARGS,        "invalid number of arguments\n"       },
    { ERROR_ARGTYPE,        "invalid argument type\n"             },

    { ERROR_TSVEC_MISMATCH,     "time-series/vector length mismatch\n"},
    { ERROR_INCOMPAT_ARGS,      "incompatible arguments\n"            },
    { ERROR_INCOMPAT_FACTORS,   "incompatible factors\n",             },

    { ERROR_UNIMPLEMENTED,      "unimplemented feature in %s\n",      },
    { ERROR_UNKNOWN,        "unknown error (report this!)\n",     }
};

void  ErrorMessage(SEXP call, int which_error, ...)
{
    int i;
    va_list(ap);
    char *dcall;
    if(inError ) jump_now();
    if(call != R_NilValue) {
        dcall = CHAR(STRING(deparse1(call, 0))[0]);
        REprintf("Error in %s : ", dcall);
    }
    else REprintf("Error: ", dcall);
    i = 0;
    while(ErrorDB[i].index != ERROR_UNKNOWN) {
        if(ErrorDB[i].index == which_error)
            break;
        i++;
    }
    va_start(ap, which_error);
    REvprintf(ErrorDB[i].format, ap);
    va_end(ap);
    jump_to_toplevel();
}

static struct {
        int     index;
        char*   format;
}
WarningDB[] = {
        { WARNING_UNKNOWN,                "unknown warning (report this!)\n", }
};

void  WarningMessage(SEXP call, int which_warn, ...)
{
        int i;
        va_list(ap);
        char *dcall;
        if(inError ) jump_now();
        if(call != R_NilValue) {
                dcall = CHAR(STRING(deparse1(call, 0))[0]);
                REprintf("Warning in %s : ", dcall);
        }
        else REprintf("Warning: ", dcall);
        i = 0;
        while(WarningDB[i].index != WARNING_UNKNOWN) {
                if(WarningDB[i].index == which_warn)
                        break;
                i++;
        }
        va_start(ap, which_warn);
        REvprintf(WarningDB[i].format, ap);
        va_end(ap);
}