https://github.com/jrincayc/ucblogo-code
Revision b2227ae71f14b631a8e1c9fead6fed7f2db2f6e6 authored by Dan Malec on 13 November 2020, 01:06:03 UTC, committed by Dan Malec on 13 November 2020, 02:04:05 UTC
On Raspberry Pi (ARM), converting the int output of getc to char and then back to int results in the EOF character being represented as 255 instead of -1. This causes infinite loops when attempting to detect the end of input from the editor.
1 parent a7bd4e1
Tip revision: b2227ae71f14b631a8e1c9fead6fed7f2db2f6e6 authored by Dan Malec on 13 November 2020, 01:06:03 UTC
ISSUE-67: Pass the output of getc as int.
ISSUE-67: Pass the output of getc as int.
Tip revision: b2227ae
math.c
/*
* math.c logo math functions module dvb
*
* Copyright (C) 1993 by the Regents of the University of California
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "logo.h"
#include "globals.h"
#include <signal.h>
#include <setjmp.h>
#include <math.h>
#define isdigit(dig) (dig >= '0' && dig <= '9')
int numberp(NODE *snd) {
int dl,dr, pcnt, plen;
char *p;
if (is_number(snd)) return(1);
snd = cnv_node_to_strnode(snd);
if (snd == UNBOUND) return(0);
p = getstrptr(snd); plen = getstrlen(snd); pcnt = dl = dr = 0;
if (plen >= MAX_NUMBER) {
return(0);
}
if (pcnt < plen && *p == '-')
p++, pcnt++;
while (pcnt < plen && isdigit(*p))
p++, pcnt++, dl++;
if (pcnt < plen && *p == '.') {
p++, pcnt++;
while (pcnt < plen && isdigit(*p))
p++, pcnt++, dr++;
}
if (pcnt < plen && (dl || dr) && (*p == 'E' || *p == 'e')) {
p++, pcnt++;
if (pcnt < plen && (*p == '+' || *p == '-'))
p++, pcnt++;
while (pcnt < plen && isdigit(*p))
p++, pcnt++, dr++;
}
if ((dl == 0 && dr == 0) || pcnt != plen)
return (0);
else
return (dr + 1);
}
NODE *lrandom(NODE *arg) {
NODE *val;
unsigned long r, base, range;
val = pos_int_arg(arg);
if (NOT_THROWING) {
if (cdr(arg)==0) { /* (random 10) => (0, 10) */
base = 0;
range = getint(val);
} else { /* (random 3 10) => (3, 8) */
base = getint(val);
val = pos_int_arg(cdr(arg));
if (NOT_THROWING) { /* (random 0 9) <=> (random 10) */
range = getint(val);
range = range + 1 - base;
}
}
}
if (NOT_THROWING) {
#ifdef HAVE_SRANDOM
r = (range <= 0 ? 0 : random() % range);
#else
r = (((long)rand()) << 15) | rand();
r = (range <= 0 ? 0 : r % range);
#endif
r += base;
val = newnode(INT);
setint(val, (FIXNUM)r);
return(val);
} else return(UNBOUND);
}
NODE *lrerandom(NODE *arg) {
int seed=1;
if (arg != NIL) {
seed = int_arg(arg);
}
if (NOT_THROWING) {
#ifdef HAVE_SRANDOM
srandom((int)seed);
#else
srand((int)seed);
#endif
}
return(UNBOUND);
}
jmp_buf oflo_buf;
BOOLEAN handling_oflo = FALSE;
#ifdef SIG_TAKES_ARG
#define sig_arg 0
void handle_oflo(int sig) {
#else
#define sig_arg
void handle_oflo() {
#endif
signal(SIGFPE, handle_oflo);
if (handling_oflo) longjmp(oflo_buf,1);
}
void math_init() {
signal(SIGFPE, handle_oflo);
}
#ifdef HAVE_MATHERR
int matherr(struct exception *x) {
if (x->type == UNDERFLOW) return(1);
longjmp(oflo_buf,1);
}
#endif
#ifdef mac
FLONUM degrad = 0.017453292520;
#else
FLONUM degrad = 3.141592653589793227020265931059839203954/180.0;
#endif
#if defined(mac)||defined(ibm)
#define errchk(x) {errno = 0; x; if (errno) err_logo(BAD_DATA_UNREC,arg);}
#include <errno.h>
#else
#define errchk(x) x
#endif
NODE *binary(NODE *args, char fcn) {
NODE *arg, *val;
BOOLEAN imode;
FIXNUM iarg = 0, ival = 0, oval, nval;
FLONUM farg = 0.0, fval = 0.0;
int sign, wantint=0;
/* Force imode, arg and fval into the stack because otherwise they may be
clobbered during setjmp/longjmp. Especially on Sparc. */
(void)&imode; (void)&arg; (void)&fval;
/*
if (fcn == '%' || fcn == 'm')
arg = integer_arg(args);
else
*/
arg = numeric_arg(args);
args = cdr(args);
if (stopping_flag == THROWING) return UNBOUND;
if (nodetype(arg) == INT) {
imode = TRUE;
ival = getint(arg);
} else {
imode = FALSE;
fval = getfloat(arg);
}
if (args == NIL) { /* one argument supplied */
if (imode)
switch(fcn) {
case '-': ival = -ival; break;
case '~': ival = ~ival; break;
case 's':
case 'c':
case 't':
case 'S':
case 'C':
case 'T':
case 'q':
case 'e':
case 'g':
case 'n':
case '/':
imode = FALSE;
fval = (FLONUM)ival;
break;
}
if (imode == FALSE) {
if (!setjmp(oflo_buf)) {
switch(fcn) {
case '-': fval = -fval; break;
case '/':
if (fval == 0.0)
err_logo(BAD_DATA_UNREC,arg);
else
fval = 1/fval;
break;
case '~': err_logo(BAD_DATA_UNREC,arg); break;
case 'c':
fval = 90.0 - fval;
case 's':
/* Kahan sez we can't just multiply any old
* angle by degrad, but have to get into the
* range 0-45 first */
sign = (fval < 0.0);
if (sign) fval = -fval;
#ifndef HAVE_DREM
fval = fmod(fval,360.0);
#else
fval = drem(fval,360.0);
#endif
if (fval > 180.0) {
fval -= 180.0;
sign = !sign;
}
if (fval > 90.0) fval = 180.0 - fval;
if (fval > 45.0)
fval = cos((90.0-fval)*degrad);
else
fval = sin(fval*degrad);
if (sign) fval = -fval;
break;
case 't': fval = atan(fval)/degrad; break;
case 'S': fval = sin(fval); break;
case 'C': fval = cos(fval); break;
case 'T': fval = atan(fval); break;
case 'q': errchk(fval = sqrt(fval)); break;
case 'e': errchk(fval = exp(fval)); break;
case 'g': errchk(fval = log10(fval)); break;
case 'n': errchk(fval = log(fval)); break;
case 'r':
fval += (fval < 0 ? -0.5 : 0.5);
case 'i':
handling_oflo = TRUE;
if (fval > (FLONUM)MAXLOGOINT ||
fval < -(FLONUM)MAXLOGOINT)
handle_oflo(sig_arg);
ival = (FIXNUM)fval;
imode = TRUE;
handling_oflo = FALSE;
break;
}
} else { /* overflow */
if (fcn == 'r' || fcn == 'i') {
if (fval < 0.0)
fval = ceil(fval);
else
fval = floor(fval);
} else
err_logo(BAD_DATA_UNREC,arg);
}
} /* end float case */
} /* end monadic */
while (args != NIL && NOT_THROWING) {
/*
if (fcn == '%' || fcn == 'm')
arg = integer_arg(args);
else
*/
arg = numeric_arg(args);
args = cdr(args);
if (stopping_flag == THROWING) return UNBOUND;
if (nodetype(arg) == INT) {
if (imode) iarg = getint(arg);
else farg = (FLONUM)getint(arg);
} else {
if (imode) {
fval = (FLONUM)ival;
imode = FALSE;
}
farg = getfloat(arg);
}
if (imode) {
oval = ival;
handling_oflo = TRUE;
if (setjmp(oflo_buf) == 0) {
switch(fcn) {
case '-': iarg = -iarg;
case '+':
if (iarg < 0) {
nval = ival + iarg;
if (nval >= ival) {
imode = FALSE;
fcn = '+';
fval = (FLONUM)ival;
farg = (FLONUM)iarg;
} else ival = nval;
} else {
nval = ival + iarg;
if (nval < ival) {
imode = FALSE;
fcn = '+';
fval = (FLONUM)ival;
farg = (FLONUM)iarg;
} else ival = nval;
}
break;
case '/':
if (iarg == 0)
err_logo(BAD_DATA_UNREC,arg);
else {
if (ival % iarg != 0) {
imode = FALSE;
fval = (FLONUM)ival;
farg = (FLONUM)iarg;
}
else ival /= iarg;
}
break;
case '%':
if (iarg == 0)
err_logo(BAD_DATA_UNREC,arg);
else
ival %= iarg;
break;
case 'm':
if (iarg == 0)
err_logo(BAD_DATA_UNREC,arg);
else
ival %= iarg;
if ((ival < 0) != (iarg < 0))
ival += iarg;
break;
case '&': ival &= iarg; break;
case '|': ival |= iarg; break;
case '^': ival ^= iarg; break;
case 'a':
case 'l':
if (iarg < 0) {
if (fcn == 'a')
ival >>= -iarg;
else
ival = (unsigned)ival
>> -iarg;
} else
ival <<= iarg;
break;
case '*':
if (ival < SAFEINT && ival > -SAFEINT &&
iarg < SAFEINT && iarg > -SAFEINT) {
ival *= iarg;
break;
}
wantint++;
default: /* math library */
imode = FALSE;
fval = (FLONUM)ival;
farg = (FLONUM)iarg;
}
} else { /* integer overflow detected */
imode = FALSE;
fval = (FLONUM)oval;
farg = (FLONUM)iarg;
}
handling_oflo = FALSE;
}
if (imode == FALSE) {
handling_oflo = TRUE;
if (setjmp(oflo_buf) == 0) {
switch(fcn) {
case '+': fval += farg; break;
case '-': fval -= farg; break;
case '*':
fval *= farg;
if (wantint) {
wantint = 0;
if (fval <= MAXLOGOINT && fval >= -MAXLOGOINT) {
imode = TRUE;
ival = (FIXNUM)fval;
}
}
break;
case '/':
if (farg == 0.0)
err_logo(BAD_DATA_UNREC,arg);
else
fval /= farg;
break;
case 't':
errchk(fval = atan2(farg,fval)/degrad);
break;
case 'T':
errchk(fval = atan2(farg,fval));
break;
case 'p':
errchk(fval = pow(fval,farg));
break;
case '%':
if (farg == 0.0)
err_logo(BAD_DATA_UNREC,arg);
else
errchk(fval = fmod(fval,farg));
break;
case 'm':
if (farg == 0.0)
err_logo(BAD_DATA_UNREC,arg);
else
errchk(fval = fmod(fval,farg));
if ((fval < 0.0) != (farg < 0.0))
fval += farg;
break;
default: /* logical op */
if (nodetype(arg) == INT)
err_logo(BAD_DATA_UNREC, make_floatnode(fval));
else
err_logo(BAD_DATA_UNREC,arg);
}
} else { /* floating overflow detected */
err_logo(BAD_DATA_UNREC,arg);
}
handling_oflo = FALSE;
} /* end floating point */
} /* end dyadic */
if (NOT_THROWING) {
if (imode) {
val = newnode(INT);
setint(val, ival);
} else {
val = newnode(FLOATT);
setfloat(val, fval);
}
return(val);
}
return(UNBOUND);
}
NODE *ladd(NODE *args) {
if (args == NIL) return make_intnode(0L);
return(binary(args, '+'));
}
NODE *lsub(NODE *args) {
return(binary(args, '-'));
}
NODE *lmul(NODE *args) {
if (args == NIL) return make_intnode(1L);
return(binary(args, '*'));
}
NODE *ldivide(NODE *args) {
return(binary(args, '/'));
}
NODE *lremainder(NODE *args) {
return(binary(args, '%'));
}
NODE *lmodulo(NODE *args) {
return(binary(args, 'm'));
}
NODE *lbitand(NODE *args) {
if (args == NIL) return make_intnode(-1);
return(binary(args, '&'));
}
NODE *lbitor(NODE *args) {
if (args == NIL) return make_intnode(0);
return(binary(args, '|'));
}
NODE *lbitxor(NODE *args) {
if (args == NIL) return make_intnode(0);
return(binary(args, '^'));
}
NODE *lashift(NODE *args) {
return(binary(args, 'a'));
}
NODE *llshift(NODE *args) {
return(binary(args, 'l'));
}
NODE *lbitnot(NODE *args) {
return(binary(args, '~'));
}
NODE *lsin(NODE *args) {
return(binary(args, 's'));
}
NODE *lcos(NODE *args) {
return(binary(args, 'c'));
}
NODE *latan(NODE *args) {
return(binary(args, 't'));
}
NODE *lradsin(NODE *args) {
return(binary(args, 'S'));
}
NODE *lradcos(NODE *args) {
return(binary(args, 'C'));
}
NODE *lradatan(NODE *args) {
return(binary(args, 'T'));
}
NODE *lsqrt(NODE *args) {
return(binary(args, 'q'));
}
NODE *linteg(NODE *args) {
return(binary(args, 'i'));
}
NODE *lroundx(NODE *args) { /* There's an lround in <math.h> */
return(binary(args, 'r'));
}
NODE *lexp(NODE *args) {
return(binary(args, 'e'));
}
NODE *llog10(NODE *args) {
return(binary(args, 'g'));
}
NODE *lln(NODE *args) {
return(binary(args, 'n'));
}
NODE *lpower(NODE *args) {
return(binary(args, 'p'));
}
int compare_numnodes(NODE *n1, NODE *n2) {
FLONUM f;
FIXNUM i;
if (nodetype(n1) == INT) {
if (nodetype(n2) == INT) {
i = getint(n1) - getint(n2);
return (i == 0L ? 0 : (i > 0L ? 1 : -1));
} else {
f = (FLONUM)getint(n1) - getfloat(n2);
return(f == 0.0 ? 0 : (f > 0.0 ? 1 : -1));
}
}
else {
if (nodetype(n2) == INT) {
f = getfloat(n1) - (FLONUM)getint(n2);
return(f == 0.0 ? 0 : (f > 0.0 ? 1 : -1));
}
else {
f = getfloat(n1) - getfloat(n2);
return(f == 0.0 ? 0 : (f > 0.0 ? 1 : -1));
}
}
}
NODE *torf(BOOLEAN tf) {
return (tf ? TrueName() : FalseName());
}
NODE *llessp(NODE *args) {
NODE *n1, *n2;
n1 = numeric_arg(args);
n2 = numeric_arg(cdr(args));
if (NOT_THROWING) {
return torf(compare_numnodes(n1, n2) < 0);
}
return(UNBOUND);
}
NODE *llessequalp(NODE *args) {
NODE *n1, *n2;
n1 = numeric_arg(args);
n2 = numeric_arg(cdr(args));
if (NOT_THROWING) {
return torf(compare_numnodes(n1, n2) <= 0);
}
return(UNBOUND);
}
NODE *lgreaterp(NODE *args) {
NODE *n1, *n2;
n1 = numeric_arg(args);
n2 = numeric_arg(cdr(args));
if (NOT_THROWING) {
return torf(compare_numnodes(n1, n2) > 0);
}
return(UNBOUND);
}
NODE *lgreaterequalp(NODE *args) {
NODE *n1, *n2;
n1 = numeric_arg(args);
n2 = numeric_arg(cdr(args));
if (NOT_THROWING) {
return torf(compare_numnodes(n1, n2) >= 0);
}
return(UNBOUND);
}
int compare_node(NODE *n1, NODE *n2, BOOLEAN ignorecase) {
NODE *a1 = NIL, *a2 = NIL, *nn1 = NIL, *nn2 = NIL;
int icmp = 0, cmp_len;
NODETYPES nt1, nt2;
if (n1 == n2) return 0;
nt1 = nodetype(n1);
nt2 = nodetype(n2);
if (!(nt1 & NT_WORD) || !(nt2 & NT_WORD)) return -9999;
if (nt1==QUOTE && is_list(node__quote(n1))) return -9999;
if (nt2==QUOTE && is_list(node__quote(n2))) return -9999;
if (nt1 == CASEOBJ && nt2 == CASEOBJ && ignorecase &&
(object__caseobj(n1) == object__caseobj(n2))) return 0;
if ((nt1 & NT_NUMBER) && (nt2 & NT_NUMBER))
return compare_numnodes(n1, n2);
if (nt1 & NT_NUMBER) {
nn2 = cnv_node_to_numnode(n2);
if (nn2 != UNBOUND) {
icmp = compare_numnodes(n1, nn2);
return icmp;
}
}
if (nt2 & NT_NUMBER) {
nn1 = cnv_node_to_numnode(n1);
if (nn1 != UNBOUND) {
icmp = compare_numnodes(nn1, n2);
return icmp;
}
}
a1 = cnv_node_to_strnode(n1);
a2 = cnv_node_to_strnode(n2);
nt1 = nodetype(a1);
nt2 = nodetype(a2);
if (nt1 == STRING && nt2 == STRING) {
if (getstrptr(a1) == getstrptr(a2))
icmp = getstrlen(a1) - getstrlen(a2);
else {
cmp_len = (getstrlen(a1) > getstrlen(a2)) ?
getstrlen(a2) : getstrlen(a1);
if (ignorecase)
icmp = low_strncmp(getstrptr(a1), getstrptr(a2), cmp_len);
else
icmp = strncmp(getstrptr(a1), getstrptr(a2), cmp_len);
if (icmp == 0)
icmp = getstrlen(a1) - getstrlen(a2);
}
}
else if (nt1 & NT_BACKSL || nt2 & NT_BACKSL) {
if (getstrptr(a1) == getstrptr(a2))
icmp = getstrlen(a1) - getstrlen(a2);
else {
cmp_len = (getstrlen(a1) > getstrlen(a2)) ?
getstrlen(a2) : getstrlen(a1);
if (ignorecase)
icmp = noparitylow_strncmp(getstrptr(a1),
getstrptr(a2), cmp_len);
else
icmp = noparity_strncmp(getstrptr(a1), getstrptr(a2), cmp_len);
if (icmp == 0)
icmp = getstrlen(a1) - getstrlen(a2);
}
}
else err_logo(FATAL, NIL);
return(icmp);
}
BOOLEAN equalp_help(NODE *arg1, NODE *arg2, BOOLEAN ignc) {
if (is_list(arg1)) {
if (!is_list(arg2)) return FALSE;
while (arg1 != NIL && arg2 != NIL) {
if (!equalp_help(car(arg1), car(arg2), ignc))
return FALSE;
arg1 = cdr(arg1);
arg2 = cdr(arg2);
if (check_throwing) break;
}
return (arg1 == NIL && arg2 == NIL);
} else if (is_list(arg2))
return FALSE;
else if (nodetype(arg1) == ARRAY) {
if (nodetype(arg2) != ARRAY) return FALSE;
return (arg1 == arg2);
} else if (nodetype(arg2) == ARRAY)
return FALSE;
else return (!compare_node(arg1, arg2, ignc));
}
NODE *lequalp(NODE *args) {
NODE *arg1, *arg2;
BOOLEAN val;
arg1 = car(args);
arg2 = cadr(args);
if (varTrue(Caseignoredp))
val = equalp_help(arg1, arg2, TRUE);
else
val = equalp_help(arg1, arg2, FALSE);
return(torf(val));
}
NODE *lnotequalp(NODE *args) {
NODE *arg1, *arg2;
BOOLEAN val;
arg1 = car(args);
arg2 = cadr(args);
if (varTrue(Caseignoredp))
val = equalp_help(arg1, arg2, TRUE);
else
val = equalp_help(arg1, arg2, FALSE);
return(torf(!val));
}
NODE *l_eq(NODE *args) {
return torf(car(args) == cadr(args));
}
NODE *lbeforep(NODE *args) {
NODE *arg1, *arg2;
int val;
arg1 = string_arg(args);
arg2 = string_arg(cdr(args));
if (varTrue(Caseignoredp))
val = compare_node(arg1, arg2, TRUE);
else
val = compare_node(arg1, arg2, FALSE);
return (val < 0 ? TrueName() : FalseName());
}
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