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zsh-workers/7981

This commit is contained in:
Tanaka Akira 1999-09-22 13:10:37 +00:00
parent f98b1581a4
commit 9878bf492b

View file

@ -45,7 +45,7 @@ int lastbase;
static char *ptr;
static mnumber yyval;
static LV yylval;
static char *yylval;
static int mlevel = 0;
@ -153,12 +153,12 @@ static int prec[TOKCOUNT] =
6, 8, 8, 8, 9,
9, 3, 3, 10, 10,
10, 10, 11, 11, 12,
13, 13, 14, 14, 15,
15, 15, 15, 15, 15,
15, 15, 15, 15, 15,
15, 15, 15, 16, 200,
13, 13, 14, 15, 16,
16, 16, 16, 16, 16,
16, 16, 16, 16, 16,
16, 16, 16, 17, 200,
2, 2, 0, 0, 7,
0, 15, 0
0, 16, 0
};
#define TOPPREC 16
@ -179,13 +179,6 @@ static int type[TOKCOUNT] =
/* 50 */ LR|OP_OPF, RL|OP_E2, LR|OP_OPF
};
#define LVCOUNT 32
/* list of lvalues (variables) */
static int lvc;
static char **lvals;
/**/
static int
@ -325,7 +318,6 @@ zzlex(void)
case '?':
if (unary) {
yyval.u.l = lastval;
unary = 0;
return NUM;
}
return QUEST;
@ -397,10 +389,6 @@ zzlex(void)
char *p, q;
p = ptr;
if (lvc == LVCOUNT) {
zerr("too many identifiers (complain to author)", NULL, 0);
return EOI;
}
while (iident(*++ptr));
if (*ptr == '[' || (!cct && *ptr == '(')) {
char op = *ptr, cp = ((*ptr == '[') ? ']' : ')');
@ -417,7 +405,7 @@ zzlex(void)
}
q = *ptr;
*ptr = '\0';
lvals[yylval = lvc++] = ztrdup(p);
yylval = dupstring(p);
*ptr = q;
return (func ? FUNC : (cct ? CID : ID));
}
@ -436,7 +424,7 @@ static int mtok; /* last token */
static int sp = -1; /* stack pointer */
struct mathvalue {
LV lval;
char *lval;
mnumber val;
};
@ -444,7 +432,7 @@ static struct mathvalue *stack;
/**/
static void
push(mnumber val, LV lval)
push(mnumber val, char *lval)
{
if (sp == STACKSZ - 1)
zerr("stack overflow", NULL, 0);
@ -457,13 +445,13 @@ push(mnumber val, LV lval)
/**/
static mnumber
getcvar(LV s)
getcvar(char *s)
{
char *t;
mnumber mn;
mn.type = MN_INTEGER;
if (!(t = getsparam(lvals[s])))
if (!(t = getsparam(s)))
mn.u.l = 0;
else
mn.u.l = STOUC(*t == Meta ? t[1] ^ 32 : *t);
@ -473,16 +461,16 @@ getcvar(LV s)
/**/
static mnumber
setvar(LV s, mnumber v)
setvar(char *s, mnumber v)
{
if (s == -1 || s >= lvc) {
if (!s) {
zerr("lvalue required", NULL, 0);
v.type = MN_INTEGER;
v.u.l = 0;
}
if (noeval)
return v;
setnparam(lvals[s], v);
setnparam(s, v);
return v;
}
@ -507,7 +495,7 @@ callmathfunc(char *o)
return f->sfunc(n, a, f->funcid);
else {
int argc = 0;
mnumber *argv, *q;
mnumber *argv = NULL, *q;
LinkList l = newlinklist();
LinkNode node;
char *p;
@ -563,7 +551,7 @@ void
op(int what)
{
mnumber a, b, c, *spval;
LV lv;
char *lv;
int tp = type[what];
if (errflag)
@ -574,10 +562,8 @@ op(int what)
}
if (tp & (OP_A2|OP_A2IR|OP_A2IO|OP_E2|OP_E2IO)) {
if (sp < 1) {
zerr("bad math expression: unbalanced stack", NULL, 0); \
return;
}
/* Make sure anyone seeing this message reports it. */
DPUTS(sp < 1, "BUG: math: not enough wallabies in outback.");
b = stack[sp--].val;
a = stack[sp--].val;
@ -610,141 +596,147 @@ op(int what)
b.u.d = (double)b.u.l;
}
}
/*
* type for operation: usually same as operands, but e.g.
* (a == b) returns int.
*/
c.type = (tp & OP_A2IR) ? MN_INTEGER : a.type;
switch(what) {
case AND:
case ANDEQ:
c.u.l = a.u.l & b.u.l;
break;
case XOR:
case XOREQ:
c.u.l = a.u.l ^ b.u.l;
break;
case OR:
case OREQ:
c.u.l = a.u.l | b.u.l;
break;
case MUL:
case MULEQ:
if (c.type == MN_FLOAT)
c.u.d = a.u.d * b.u.d;
else
c.u.l = a.u.l * b.u.l;
break;
case DIV:
case DIVEQ:
if (!notzero(b))
return;
if (c.type == MN_FLOAT)
c.u.d = a.u.d / b.u.d;
else
c.u.l = a.u.l / b.u.l;
break;
case MOD:
case MODEQ:
if (!notzero(b))
return;
c.u.l = a.u.l % b.u.l;
break;
case PLUS:
case PLUSEQ:
if (c.type == MN_FLOAT)
c.u.d = a.u.d + b.u.d;
else
c.u.l = a.u.l + b.u.l;
break;
case MINUS:
case MINUSEQ:
if (c.type == MN_FLOAT)
c.u.d = a.u.d - b.u.d;
else
c.u.l = a.u.l - b.u.l;
break;
case SHLEFT:
case SHLEFTEQ:
c.u.l = a.u.l << b.u.l;
break;
case SHRIGHT:
case SHRIGHTEQ:
c.u.l = a.u.l >> b.u.l;
break;
case LES:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d < b.u.d) : (a.u.l < b.u.l));
break;
case LEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d <= b.u.d) : (a.u.l <= b.u.l));
break;
case GRE:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d > b.u.d) : (a.u.l > b.u.l));
break;
case GEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d >= b.u.d) : (a.u.l >= b.u.l));
break;
case DEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d == b.u.d) : (a.u.l == b.u.l));
break;
case NEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d != b.u.d) : (a.u.l != b.u.l));
break;
case DAND:
case DANDEQ:
c.u.l = (zlong)(a.u.l && b.u.l);
break;
case DOR:
case DOREQ:
c.u.l = (zlong)(a.u.l || b.u.l);
break;
case DXOR:
case DXOREQ:
c.u.l = (zlong)((a.u.l && !b.u.l) || (!a.u.l && b.u.l));
break;
case COMMA:
c = b;
break;
case POWER:
case POWEREQ:
if (c.type == MN_INTEGER && b.u.l < 0) {
/* produces a real result, so cast to real. */
a.type = b.type = c.type = MN_FLOAT;
a.u.d = (double) a.u.l;
b.u.d = (double) b.u.l;
}
if (c.type == MN_INTEGER) {
for (c.u.l = 1; b.u.l--; c.u.l *= a.u.l);
} else {
if (b.u.d <= 0 && !notzero(a))
if (noeval) {
c.type = MN_INTEGER;
c.u.l = 0;
} else {
/*
* type for operation: usually same as operands, but e.g.
* (a == b) returns int.
*/
c.type = (tp & OP_A2IR) ? MN_INTEGER : a.type;
switch(what) {
case AND:
case ANDEQ:
c.u.l = a.u.l & b.u.l;
break;
case XOR:
case XOREQ:
c.u.l = a.u.l ^ b.u.l;
break;
case OR:
case OREQ:
c.u.l = a.u.l | b.u.l;
break;
case MUL:
case MULEQ:
if (c.type == MN_FLOAT)
c.u.d = a.u.d * b.u.d;
else
c.u.l = a.u.l * b.u.l;
break;
case DIV:
case DIVEQ:
if (!notzero(b))
return;
if (a.u.d < 0) {
/* Error if (-num ** b) and b is not an integer */
double tst = (double)(zlong)b.u.d;
if (tst != b.u.d) {
zerr("imaginary power", NULL, 0);
return;
}
if (c.type == MN_FLOAT)
c.u.d = a.u.d / b.u.d;
else
c.u.l = a.u.l / b.u.l;
break;
case MOD:
case MODEQ:
if (!notzero(b))
return;
c.u.l = a.u.l % b.u.l;
break;
case PLUS:
case PLUSEQ:
if (c.type == MN_FLOAT)
c.u.d = a.u.d + b.u.d;
else
c.u.l = a.u.l + b.u.l;
break;
case MINUS:
case MINUSEQ:
if (c.type == MN_FLOAT)
c.u.d = a.u.d - b.u.d;
else
c.u.l = a.u.l - b.u.l;
break;
case SHLEFT:
case SHLEFTEQ:
c.u.l = a.u.l << b.u.l;
break;
case SHRIGHT:
case SHRIGHTEQ:
c.u.l = a.u.l >> b.u.l;
break;
case LES:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d < b.u.d) : (a.u.l < b.u.l));
break;
case LEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d <= b.u.d) : (a.u.l <= b.u.l));
break;
case GRE:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d > b.u.d) : (a.u.l > b.u.l));
break;
case GEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d >= b.u.d) : (a.u.l >= b.u.l));
break;
case DEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d == b.u.d) : (a.u.l == b.u.l));
break;
case NEQ:
c.u.l = (zlong)
(a.type == MN_FLOAT ? (a.u.d != b.u.d) : (a.u.l != b.u.l));
break;
case DAND:
case DANDEQ:
c.u.l = (zlong)(a.u.l && b.u.l);
break;
case DOR:
case DOREQ:
c.u.l = (zlong)(a.u.l || b.u.l);
break;
case DXOR:
case DXOREQ:
c.u.l = (zlong)((a.u.l && !b.u.l) || (!a.u.l && b.u.l));
break;
case COMMA:
c = b;
break;
case POWER:
case POWEREQ:
if (c.type == MN_INTEGER && b.u.l < 0) {
/* produces a real result, so cast to real. */
a.type = b.type = c.type = MN_FLOAT;
a.u.d = (double) a.u.l;
b.u.d = (double) b.u.l;
}
c.u.d = pow(a.u.d, b.u.d);
if (c.type == MN_INTEGER) {
for (c.u.l = 1; b.u.l--; c.u.l *= a.u.l);
} else {
if (b.u.d <= 0 && !notzero(a))
return;
if (a.u.d < 0) {
/* Error if (-num ** b) and b is not an integer */
double tst = (double)(zlong)b.u.d;
if (tst != b.u.d) {
zerr("imaginary power", NULL, 0);
return;
}
}
c.u.d = pow(a.u.d, b.u.d);
}
break;
case EQ:
c = b;
break;
}
break;
case EQ:
c = b;
break;
}
if (tp & (OP_E2|OP_E2IO)) {
lv = stack[sp+1].lval;
push(setvar(lv,c), lv);
} else
push(c,-1);
push(c,NULL);
return;
}
@ -756,7 +748,7 @@ op(int what)
spval->type = MN_INTEGER;
} else
spval->u.l = !spval->u.l;
stack[sp].lval = -1;
stack[sp].lval = NULL;
break;
case COMP:
if (spval->type & MN_FLOAT) {
@ -764,7 +756,7 @@ op(int what)
spval->type = MN_INTEGER;
} else
spval->u.l = ~spval->u.l;
stack[sp].lval = -1;
stack[sp].lval = NULL;
break;
case POSTPLUS:
a = *spval;
@ -783,25 +775,22 @@ op(int what)
(void)setvar(stack[sp].lval, a);
break;
case UPLUS:
stack[sp].lval = -1;
stack[sp].lval = NULL;
break;
case UMINUS:
if (spval->type & MN_FLOAT)
spval->u.d = -spval->u.d;
else
spval->u.l = -spval->u.l;
stack[sp].lval = -1;
stack[sp].lval = NULL;
break;
case QUEST:
if (sp < 2) {
zerr("bad math expression: unbalanced stack", NULL, 0);
return;
}
DPUTS(sp < 2, "BUG: math: three shall be the number of the counting.");
c = stack[sp--].val;
b = stack[sp--].val;
a = stack[sp--].val;
/* b and c can stay different types in this case. */
push(((a.type & MN_FLOAT) ? a.u.d : a.u.l) ? b : c, -1);
push(((a.type & MN_FLOAT) ? a.u.d : a.u.l) ? b : c, NULL);
break;
case COLON:
break;
@ -852,48 +841,41 @@ bop(int tk)
static mnumber
mathevall(char *s, int prek, char **ep)
{
int t0;
int xlastbase, xnoeval, xunary, xlvc;
int xlastbase, xnoeval, xunary;
char *xptr;
mnumber xyyval;
LV xyylval;
char **xlvals = 0, *nlvals[LVCOUNT];
char *xyylval;
int xsp;
struct mathvalue *xstack = 0, nstack[STACKSZ];
mnumber ret;
MUSTUSEHEAP("mathevall");
if (mlevel++) {
xlastbase = lastbase;
xnoeval = noeval;
xunary = unary;
xlvc = lvc;
xptr = ptr;
xyyval = yyval;
xyylval = yylval;
xlvals = lvals;
xsp = sp;
xstack = stack;
} else {
xlastbase = xnoeval = xunary = xlvc = xyylval = xsp = 0;
xlastbase = xnoeval = xunary = xsp = 0;
xyyval.type = MN_INTEGER;
xyyval.u.l = 0;
xyylval = NULL;
xptr = NULL;
}
stack = nstack;
lastbase = -1;
memset(nlvals, 0, LVCOUNT*sizeof(char *));
lvals = nlvals;
lvc = 0;
ptr = s;
sp = -1;
unary = 1;
mathparse(prek);
*ep = ptr;
if (sp)
zerr("bad math expression: unbalanced stack", NULL, 0);
for (t0 = 0; t0 != lvc; t0++)
zsfree(lvals[t0]);
DPUTS(!errflag && sp,
"BUG: math: wallabies roaming too freely in outback");
ret = stack[0].val;
@ -901,11 +883,9 @@ mathevall(char *s, int prek, char **ep)
lastbase = xlastbase;
noeval = xnoeval;
unary = xunary;
lvc = xlvc;
ptr = xptr;
yyval = xyyval;
yylval = xyylval;
lvals = xlvals;
sp = xsp;
stack = xstack;
@ -964,9 +944,10 @@ mathevalarg(char *s, char **ss)
/**/
static void
checkunary(int tp, char *ptr)
checkunary(int mtokc, char *ptr)
{
int errmsg = 0;
int tp = type[mtokc];
if (tp & (OP_A2|OP_A2IR|OP_A2IO|OP_E2|OP_E2IO|OP_OP)) {
if (unary)
errmsg = 1;
@ -1005,22 +986,22 @@ mathparse(int pc)
if (errflag)
return;
mtok = zzlex();
checkunary(type[mtok], optr);
checkunary(mtok, optr);
while (prec[mtok] <= pc) {
if (errflag)
return;
switch (mtok) {
case NUM:
push(yyval, -1);
push(yyval, NULL);
break;
case ID:
push(getnparam(lvals[yylval]), yylval);
push(getnparam(yylval), yylval);
break;
case CID:
push(getcvar(yylval), yylval);
break;
case FUNC:
push(callmathfunc(lvals[yylval]), yylval);
push(callmathfunc(yylval), yylval);
break;
case M_INPAR:
mathparse(TOPPREC);
@ -1036,10 +1017,15 @@ mathparse(int pc)
if (!q)
noeval++;
mathparse(prec[QUEST] - 1);
mathparse(prec[COLON] - 1);
if (!q)
noeval--;
else
if (mtok != COLON) {
if (!errflag)
zerr("':' expected", NULL, 0);
return;
}
if (q)
noeval++;
mathparse(prec[QUEST]);
if (q)
@ -1058,6 +1044,6 @@ mathparse(int pc)
}
optr = ptr;
mtok = zzlex();
checkunary(type[mtok], optr);
checkunary(mtok, optr);
}
}