4.4BSD/usr/src/contrib/calc-1.26.4/opcodes.c
/*
* Copyright (c) 1993 David I. Bell
* Permission is granted to use, distribute, or modify this source,
* provided that this copyright notice remains intact.
*
* Opcode execution module
*/
#include "stdarg.h"
#include "calc.h"
#include "opcodes.h"
#include "func.h"
#include "symbol.h"
#include "hist.h"
#define QUICKLOCALS 20 /* local vars to handle quickly */
VALUE *stack; /* current location of top of stack */
static VALUE stackarray[MAXSTACK]; /* storage for stack */
static VALUE oldvalue; /* previous calculation value */
static char *funcname; /* function being executed */
static long funcline; /* function line being executed */
FLAG traceflags; /* current trace flags */
/*
* Routine definitions
*/
static void o_nop(), o_localaddr(), o_globaladdr(), o_paramaddr();
static void o_globalvalue(), o_paramvalue(), o_number(), o_indexaddr();
static void o_indexvalue(), o_assign(), o_add(), o_sub(), o_mul(), o_div();
static void o_mod(), o_save(), o_negate(), o_invert(), o_int(), o_frac();
static void o_numerator(), o_denominator(), o_duplicate(), o_pop();
static void o_jumpeq(), o_jumpne(), o_jump(), o_usercall(), o_getvalue();
static void o_eq(), o_ne(), o_le(), o_ge(), o_lt(), o_gt(), o_preinc();
static void o_postinc(), o_postdec(), o_debug(), o_print(), o_assignpop();
static void o_zero(), o_one(), o_printeol(), o_printspace(), o_printstring();
static void o_oldvalue(), o_quo(), o_power(), o_quit(), o_call(), o_swap();
static void o_dupvalue(), o_getepsilon(), o_and(), o_or(), o_not();
static void o_abs(), o_sgn(), o_isint(), o_condorjump(), o_condandjump();
static void o_square(), o_string(), o_isnum(), o_undef(), o_isnull();
static void o_matinit(), o_ismat(), o_isstr(), o_getconfig(), o_predec();
static void o_leftshift(), o_rightshift(), o_casejump();
static void o_isodd(), o_iseven(), o_fiaddr(), o_fivalue(), o_argvalue();
static void o_isreal(), o_imaginary(), o_re(), o_im(), o_conjugate();
static void o_objinit(), o_isobj(), o_norm(), o_elemaddr(), o_elemvalue();
static void o_istype(), o_scale(), o_localvalue(), o_return(), o_islist();
static void o_issimple(), o_cmp(), o_quomod(), o_setconfig(), o_setepsilon();
static void o_printresult(), o_isfile();
/*
* Types of opcodes (depends on arguments saved after the opcode).
*/
#define OPNUL 1 /* opcode has no arguments */
#define OPONE 2 /* opcode has one integer argument */
#define OPTWO 3 /* opcode has two integer arguments */
#define OPJMP 4 /* opcode is a jump (with one pointer argument) */
#define OPRET 5 /* opcode is a return (with no argument) */
#define OPGLB 6 /* opcode has global symbol pointer argument */
#define OPPAR 7 /* opcode has parameter index argument */
#define OPLOC 8 /* opcode needs local variable pointer (with one arg) */
#define OPSTR 9 /* opcode has a string constant arg */
#define OPARG 10 /* opcode is given number of arguments */
/*
* Information about each opcode.
*/
static struct opcode {
void (*o_func)(); /* routine to call for opcode */
int o_type; /* type of opcode */
char *o_name; /* name of opcode */
} opcodes[MAX_OPCODE+1] = {
o_nop, OPNUL, "NOP", /* no operation */
o_localaddr, OPLOC, "LOCALADDR", /* address of local variable */
o_globaladdr, OPGLB, "GLOBALADDR", /* address of global variable */
o_paramaddr, OPPAR, "PARAMADDR", /* address of paramater variable */
o_localvalue, OPLOC, "LOCALVALUE", /* value of local variable */
o_globalvalue, OPGLB, "GLOBALVALUE", /* value of global variable */
o_paramvalue, OPPAR, "PARAMVALUE", /* value of paramater variable */
o_number, OPONE, "NUMBER", /* constant real numeric value */
o_indexaddr, OPONE, "INDEXADDR", /* array index address */
o_indexvalue, OPONE, "INDEXVALUE", /* array value */
o_assign, OPNUL, "ASSIGN", /* assign value to variable */
o_add, OPNUL, "ADD", /* add top two values */
o_sub, OPNUL, "SUB", /* subtract top two values */
o_mul, OPNUL, "MUL", /* multiply top two values */
o_div, OPNUL, "DIV", /* divide top two values */
o_mod, OPNUL, "MOD", /* take mod of top two values */
o_save, OPNUL, "SAVE", /* save value for later use */
o_negate, OPNUL, "NEGATE", /* negate top value */
o_invert, OPNUL, "INVERT", /* invert top value */
o_int, OPNUL, "INT", /* take integer part */
o_frac, OPNUL, "FRAC", /* take fraction part */
o_numerator, OPNUL, "NUMERATOR", /* take numerator */
o_denominator, OPNUL, "DENOMINATOR", /* take denominator */
o_duplicate, OPNUL, "DUPLICATE", /* duplicate top value */
o_pop, OPNUL, "POP", /* pop top value */
o_return, OPRET, "RETURN", /* return value of function */
o_jumpeq, OPJMP, "JUMPEQ", /* jump if value zero */
o_jumpne, OPJMP, "JUMPNE", /* jump if value nonzero */
o_jump, OPJMP, "JUMP", /* jump unconditionally */
o_usercall, OPTWO, "USERCALL", /* call a user function */
o_getvalue, OPNUL, "GETVALUE", /* convert address to value */
o_eq, OPNUL, "EQ", /* test elements for equality */
o_ne, OPNUL, "NE", /* test elements for inequality */
o_le, OPNUL, "LE", /* test elements for <= */
o_ge, OPNUL, "GE", /* test elements for >= */
o_lt, OPNUL, "LT", /* test elements for < */
o_gt, OPNUL, "GT", /* test elements for > */
o_preinc, OPNUL, "PREINC", /* add one to variable (++x) */
o_predec, OPNUL, "PREDEC", /* subtract one from variable (--x) */
o_postinc, OPNUL, "POSTINC", /* add one to variable (x++) */
o_postdec, OPNUL, "POSTDEC", /* subtract one from variable (x--) */
o_debug, OPONE, "DEBUG", /* debugging point */
o_print, OPONE, "PRINT", /* print value */
o_assignpop, OPNUL, "ASSIGNPOP", /* assign to variable and pop it */
o_zero, OPNUL, "ZERO", /* put zero on the stack */
o_one, OPNUL, "ONE", /* put one on the stack */
o_printeol, OPNUL, "PRINTEOL", /* print end of line */
o_printspace, OPNUL, "PRINTSPACE", /* print a space */
o_printstring, OPSTR, "PRINTSTR", /* print constant string */
o_dupvalue, OPNUL, "DUPVALUE", /* duplicate value of top value */
o_oldvalue, OPNUL, "OLDVALUE", /* old value from previous calc */
o_quo, OPNUL, "QUO", /* integer quotient of top values */
o_power, OPNUL, "POWER", /* value raised to a power */
o_quit, OPSTR, "QUIT", /* quit program */
o_call, OPTWO, "CALL", /* call built-in routine */
o_getepsilon, OPNUL, "GETEPSILON", /* get allowed error for calculations */
o_and, OPNUL, "AND", /* arithmetic and or top two values */
o_or, OPNUL, "OR", /* arithmetic or of top two values */
o_not, OPNUL, "NOT", /* logical not or top value */
o_abs, OPNUL, "ABS", /* absolute value of top value */
o_sgn, OPNUL, "SGN", /* sign of number */
o_isint, OPNUL, "ISINT", /* whether number is an integer */
o_condorjump, OPJMP, "CONDORJUMP", /* conditional or jump */
o_condandjump, OPJMP, "CONDANDJUMP", /* conditional and jump */
o_square, OPNUL, "SQUARE", /* square top value */
o_string, OPSTR, "STRING", /* string constant value */
o_isnum, OPNUL, "ISNUM", /* whether value is a number */
o_undef, OPNUL, "UNDEF", /* load undefined value on stack */
o_isnull, OPNUL, "ISNULL", /* whether value is the null value */
o_argvalue, OPARG, "ARGVALUE", /* load value of arg (parameter) n */
o_matinit, OPONE, "MATINIT", /* initialize matrix */
o_ismat, OPNUL, "ISMAT", /* whether value is a matrix */
o_isstr, OPNUL, "ISSTR", /* whether value is a string */
o_getconfig, OPNUL, "GETCONFIG", /* get value of configuration parameter */
o_leftshift, OPNUL, "LEFTSHIFT", /* left shift of integer */
o_rightshift, OPNUL, "RIGHTSHIFT", /* right shift of integer */
o_casejump, OPJMP, "CASEJUMP", /* test case and jump if not matched */
o_isodd, OPNUL, "ISODD", /* whether value is odd integer */
o_iseven, OPNUL, "ISEVEN", /* whether value is even integer */
o_fiaddr, OPNUL, "FIADDR", /* 'fast index' matrix address */
o_fivalue, OPNUL, "FIVALUE", /* 'fast index' matrix value */
o_isreal, OPNUL, "ISREAL", /* whether value is real number */
o_imaginary, OPONE, "IMAGINARY", /* constant imaginary numeric value */
o_re, OPNUL, "RE", /* real part of complex number */
o_im, OPNUL, "IM", /* imaginary part of complex number */
o_conjugate, OPNUL, "CONJUGATE", /* complex conjugate */
o_objinit, OPONE, "OBJINIT", /* initialize object */
o_isobj, OPNUL, "ISOBJ", /* whether value is an object */
o_norm, OPNUL, "NORM", /* norm of value (square of abs) */
o_elemaddr, OPONE, "ELEMADDR", /* address of element of object */
o_elemvalue, OPONE, "ELEMVALUE", /* value of element of object */
o_istype, OPNUL, "ISTYPE", /* whether types are the same */
o_scale, OPNUL, "SCALE", /* scale value by a power of two */
o_islist, OPNUL, "ISLIST", /* whether value is a list */
o_swap, OPNUL, "SWAP", /* swap values of two variables */
o_issimple, OPNUL, "ISSIMPLE", /* whether value is simple type */
o_cmp, OPNUL, "CMP", /* compare values returning -1, 0, 1 */
o_quomod, OPNUL, "QUOMOD", /* calculate quotient and remainder */
o_setconfig, OPNUL, "SETCONFIG", /* set configuration parameter */
o_setepsilon, OPNUL, "SETEPSILON", /* set allowed error for calculations */
o_printresult, OPNUL, "PRINTRESULT", /* print result of top-level expression */
o_isfile, OPNUL, "ISFILE" /* whether value is a file */
};
/*
* Initialize the stack.
*/
void
initstack()
{
if (stack == NULL)
stack = stackarray;
while (stack != stackarray)
freevalue(stack--);
}
/*
* Compute the result of a function by interpreting opcodes.
* Arguments have just been pushed onto the evaluation stack.
*/
void
calculate(fp, argcount)
register FUNC *fp; /* function to calculate */
int argcount; /* number of arguments called with */
{
register unsigned long pc; /* current pc inside function */
register struct opcode *op; /* current opcode pointer */
register VALUE *locals; /* pointer to local variables */
long oldline; /* old value of line counter */
unsigned int opnum; /* current opcode number */
int origargcount; /* original number of arguments */
int i; /* loop counter */
BOOL dojump; /* TRUE if jump is to occur */
char *oldname; /* old function name being executed */
VALUE *beginstack; /* beginning of stack frame */
VALUE *args; /* pointer to function arguments */
VALUE retval; /* function return value */
VALUE localtable[QUICKLOCALS]; /* some local variables */
oldname = funcname;
oldline = funcline;
funcname = fp->f_name;
funcline = 0;
origargcount = argcount;
while (argcount < fp->f_paramcount) {
stack++;
stack->v_type = V_NULL;
argcount++;
}
locals = localtable;
if (fp->f_localcount > QUICKLOCALS) {
locals = (VALUE *) malloc(sizeof(VALUE) * fp->f_localcount);
if (locals == NULL)
error("No memory for local variables");
}
for (i = 0; i < fp->f_localcount; i++)
locals[i].v_type = V_NULL;
pc = 0;
beginstack = stack;
args = beginstack - (argcount - 1);
for (;;) {
if (abortlevel >= ABORT_OPCODE)
error("Calculation aborted in opcode");
if (pc >= fp->f_opcodecount)
error("Function pc out of range");
if (stack > &stackarray[MAXSTACK-3])
error("Evaluation stack depth exceeded");
opnum = fp->f_opcodes[pc];
if (opnum > MAX_OPCODE)
error("Function opcode out of range");
op = &opcodes[opnum];
if (traceflags & TRACE_OPCODES) {
printf("%8s, pc %4ld: ", fp->f_name, pc);
(void)dumpop(&fp->f_opcodes[pc]);
}
/*
* Now call the opcode routine appropriately.
*/
pc++;
switch (op->o_type) {
case OPNUL: /* no extra arguments */
(*op->o_func)(fp);
break;
case OPONE: /* one extra integer argument */
(*op->o_func)(fp, fp->f_opcodes[pc++]);
break;
case OPTWO: /* two extra integer arguments */
(*op->o_func)(fp, fp->f_opcodes[pc],
fp->f_opcodes[pc+1]);
pc += 2;
break;
case OPJMP: /* jump opcodes (one extra pointer arg) */
dojump = FALSE;
(*op->o_func)(fp, &dojump);
if (dojump)
pc = fp->f_opcodes[pc];
else
pc++;
break;
case OPGLB: /* global symbol reference (pointer arg) */
case OPSTR: /* string constant address */
(*op->o_func)(fp, *((char **) &fp->f_opcodes[pc]));
pc += PTR_SIZE;
break;
case OPLOC: /* local variable reference */
(*op->o_func)(fp, locals, fp->f_opcodes[pc++]);
break;
case OPPAR: /* parameter variable reference */
(*op->o_func)(fp, argcount, args, fp->f_opcodes[pc++]);
break;
case OPARG: /* parameter variable reference */
(*op->o_func)(fp, origargcount, args);
break;
case OPRET: /* return from function */
if (stack->v_type == V_ADDR)
copyvalue(stack->v_addr, stack);
for (i = 0; i < fp->f_localcount; i++)
freevalue(&locals[i]);
if (locals != localtable)
free(locals);
if (stack != &beginstack[1])
error("Misaligned stack");
if (argcount <= 0) {
funcname = oldname;
funcline = oldline;
return;
}
retval = *stack--;
while (--argcount >= 0)
freevalue(stack--);
*++stack = retval;
funcname = oldname;
funcline = oldline;
return;
default:
error("Unknown opcode type");
}
}
}
/*
* Dump an opcode at a particular address.
* Returns the size of the opcode so that it can easily be skipped over.
*/
int
dumpop(pc)
long *pc; /* location of the opcode */
{
unsigned long op; /* opcode number */
op = *pc++;
if (op <= MAX_OPCODE)
printf("%s", opcodes[op].o_name);
else
printf("OP%ld", op);
switch (op) {
case OP_LOCALADDR: case OP_LOCALVALUE:
printf(" %s\n", localname(*pc));
return 2;
case OP_GLOBALADDR: case OP_GLOBALVALUE:
printf(" %s\n", globalname((GLOBAL *) pc));
return (1 + PTR_SIZE);
case OP_PARAMADDR: case OP_PARAMVALUE:
printf(" %s\n", paramname(*pc));
return 2;
case OP_PRINTSTRING: case OP_STRING:
printf(" \"%s\"\n", *((char **) pc));
return (1 + PTR_SIZE);
case OP_QUIT:
if (*(char **) pc)
printf(" \"%s\"\n", *((char **) pc));
else
printf("\n");
return (1 + PTR_SIZE);
case OP_MATINIT: case OP_INDEXADDR: case OP_INDEXVALUE:
case OP_PRINT: case OP_JUMPEQ: case OP_JUMPNE: case OP_JUMP:
case OP_CONDORJUMP: case OP_CONDANDJUMP: case OP_CASEJUMP:
case OP_OBJINIT:
printf(" %ld\n", *pc);
return 2;
case OP_NUMBER: case OP_IMAGINARY:
qprintf(" %r\n", constvalue(*pc));
return 2;
case OP_DEBUG:
printf(" line %ld\n", *pc);
return 2;
case OP_CALL:
printf(" %s with %ld args\n", builtinname(pc[0]), pc[1]);
return 3;
case OP_USERCALL:
printf(" %s with %ld args\n", namefunc(pc[0]), pc[1]);
return 3;
default:
printf("\n");
return 1;
}
}
/*
* The various opcodes
*/
static void
o_nop()
{
}
static void
o_localaddr(fp, locals, index)
FUNC *fp;
VALUE *locals;
long index;
{
if ((unsigned long)index >= fp->f_localcount)
error("Bad local variable index");
locals += index;
stack++;
stack->v_addr = locals;
stack->v_type = V_ADDR;
}
/*ARGSUSED*/
static void
o_globaladdr(fp, sp)
FUNC *fp;
GLOBAL *sp;
{
if (sp == NULL)
error("Global variable \"%s\" not initialized", sp->g_name);
stack++;
stack->v_addr = &sp->g_value;
stack->v_type = V_ADDR;
}
/*ARGSUSED*/
static void
o_paramaddr(fp, argcount, args, index)
FUNC *fp;
int argcount;
VALUE *args;
long index;
{
if ((unsigned long)index >= argcount)
error("Bad parameter index");
args += index;
stack++;
if (args->v_type == V_ADDR)
stack->v_addr = args->v_addr;
else
stack->v_addr = args;
stack->v_type = V_ADDR;
}
static void
o_localvalue(fp, locals, index)
FUNC *fp;
VALUE *locals;
long index;
{
if ((unsigned long)index >= fp->f_localcount)
error("Bad local variable index");
locals += index;
copyvalue(locals, ++stack);
}
/*ARGSUSED*/
static void
o_globalvalue(fp, sp)
FUNC *fp;
GLOBAL *sp; /* global symbol */
{
if (sp == NULL)
error("Global variable not defined");
copyvalue(&sp->g_value, ++stack);
}
/*ARGSUSED*/
static void
o_paramvalue(fp, argcount, args, index)
FUNC *fp;
int argcount;
VALUE *args;
long index;
{
if ((unsigned long)index >= argcount)
error("Bad paramaeter index");
args += index;
if (args->v_type == V_ADDR)
args = args->v_addr;
copyvalue(args, ++stack);
}
static void
o_argvalue(fp, argcount, args)
FUNC *fp;
int argcount;
VALUE *args;
{
VALUE *vp;
long index;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if ((vp->v_type != V_NUM) || qisneg(vp->v_num) ||
qisfrac(vp->v_num))
error("Illegal argument for arg function");
if (qiszero(vp->v_num)) {
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = itoq((long) argcount);
stack->v_type = V_NUM;
return;
}
index = qtoi(vp->v_num) - 1;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
(void) o_paramvalue(fp, argcount, args, index);
}
/*ARGSUSED*/
static void
o_number(fp, arg)
FUNC *fp;
long arg;
{
NUMBER *q;
q = constvalue(arg);
if (q == NULL)
error("Numeric constant value not found");
stack++;
stack->v_num = qlink(q);
stack->v_type = V_NUM;
}
/*ARGSUSED*/
static void
o_imaginary(fp, arg)
FUNC *fp;
long arg;
{
NUMBER *q;
COMPLEX *c;
q = constvalue(arg);
if (q == NULL)
error("Numeric constant value not found");
stack++;
if (qiszero(q)) {
stack->v_num = qlink(q);
stack->v_type = V_NUM;
return;
}
c = comalloc();
c->real = qlink(&_qzero_);
c->imag = qlink(q);
stack->v_com = c;
stack->v_type = V_COM;
}
/*ARGSUSED*/
static void
o_string(fp, cp)
FUNC *fp;
char *cp;
{
stack++;
stack->v_str = cp;
stack->v_type = V_STR;
stack->v_subtype = V_STRLITERAL;
}
static void
o_undef()
{
stack++;
stack->v_type = V_NULL;
}
/*ARGSUSED*/
static void
o_matinit(fp, dim)
FUNC *fp;
long dim;
{
register MATRIX *mp; /* matrix being defined */
NUMBER *num1; /* first number from stack */
NUMBER *num2; /* second number from stack */
VALUE *vp; /* value being defined */
VALUE *v1, *v2;
long min[MAXDIM]; /* minimum range */
long max[MAXDIM]; /* maximum range */
long i; /* index */
long tmp; /* temporary */
long size; /* size of matrix */
if ((dim <= 0) || (dim > MAXDIM))
error("Bad dimension %ld for matrix", dim);
if (stack[-2*dim].v_type != V_ADDR)
error("Attempting to init matrix for non-address");
size = 1;
for (i = dim - 1; i >= 0; i--) {
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM))
error("Non-numeric bounds for matrix");
num1 = v1->v_num;
num2 = v2->v_num;
if (qisfrac(num1) || qisfrac(num2))
error("Non-integral bounds for matrix");
if (isbig(num1->num) || isbig(num2->num))
error("Very large bounds for matrix");
min[i] = qtoi(num1);
max[i] = qtoi(num2);
if (min[i] > max[i]) {
tmp = min[i];
min[i] = max[i];
max[i] = tmp;
}
size *= (max[i] - min[i] + 1);
if (size > 1000000)
error("Very large size for matrix");
freevalue(stack--);
freevalue(stack--);
}
mp = matalloc(size);
mp->m_dim = dim;
for (i = 0; i < dim; i++) {
mp->m_min[i] = min[i];
mp->m_max[i] = max[i];
}
vp = mp->m_table;
for (i = 0; i < size; i++) {
vp->v_type = V_NUM;
vp->v_num = qlink(&_qzero_);
vp++;
}
vp = stack[0].v_addr;
vp->v_type = V_MAT;
vp->v_mat = mp;
stack--;
}
/*ARGSUSED*/
static void
o_indexaddr(fp, dim)
FUNC *fp;
long dim; /* dimension of matrix */
{
register MATRIX *mp; /* current matrix element */
VALUE *curvp; /* current stack address */
VALUE *vp; /* real stack value */
NUMBER *q; /* index value */
long index; /* index value as an integer */
long offset; /* current offset into array */
int i; /* loop counter */
if ((dim <= 0) || (dim > MAXDIM))
error("Bad dimension %ld for matrix", dim);
if (stack[-dim].v_type != V_ADDR)
error("Non-pointer for index operation");
if (stack[-dim].v_addr->v_type != V_MAT)
error("Attempting to index a non-matrix variable");
mp = stack[-dim].v_addr->v_mat;
if (mp->m_dim != dim)
error("Indexing a %ldd matrix as a %ldd matrix", mp->m_dim, dim);
offset = 0;
curvp = &stack[-dim + 1];
for (i = 0; i < dim; i++) {
vp = curvp;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_NUM)
error("Non-numeric index for array");
q = vp->v_num;
if (qisfrac(q))
error("Non-integral index for array");
index = qtoi(q);
if (isbig(q->num) || (index < mp->m_min[i]) || (index > mp->m_max[i]))
error("Index out of bounds");
offset *= (mp->m_max[i] - mp->m_min[i] + 1);
offset += (index - mp->m_min[i]);
freevalue(curvp++);
}
stack -= dim;
stack->v_type = V_ADDR;
stack->v_addr = mp->m_table + offset;
}
static void
o_indexvalue(fp, dim)
FUNC *fp;
long dim;
{
(void) o_indexaddr(fp, dim);
(void) o_getvalue();
}
/*ARGSUSED*/
static void
o_elemaddr(fp, index)
FUNC *fp;
long index;
{
if (stack->v_type != V_ADDR)
error("Non-pointer for element reference");
if (stack->v_addr->v_type != V_OBJ)
error("Referencing element of non-object");
index = objoffset(stack->v_addr->v_obj, index);
if (index < 0)
error("Element does not exist for object");
stack->v_addr = &stack->v_addr->v_obj->o_table[index];
}
static void
o_elemvalue(fp, index)
FUNC *fp;
long index;
{
if (stack->v_type != V_OBJ) {
(void) o_elemaddr(fp, index);
(void) o_getvalue();
return;
}
index = objoffset(stack->v_obj, index);
if (index < 0)
error("Element does not exist for object");
copyvalue(&stack->v_obj->o_table[index], stack);
}
/*ARGSUSED*/
static void
o_objinit(fp, arg)
FUNC *fp;
long arg;
{
OBJECT *op; /* object being created */
VALUE *vp; /* value being defined */
if (stack->v_type != V_ADDR)
error("Attempting to init object for non-address");
op = objalloc(arg);
vp = stack->v_addr;
vp->v_type = V_OBJ;
vp->v_obj = op;
stack--;
}
static void
o_assign()
{
VALUE *var; /* variable value */
VALUE *vp;
var = &stack[-1];
if (var->v_type != V_ADDR)
error("Assignment into non-variable");
var = var->v_addr;
stack[-1] = stack[0];
stack--;
vp = stack;
if (vp->v_type == V_ADDR) {
vp = vp->v_addr;
if (vp == var)
return;
}
freevalue(var);
copyvalue(vp, var);
}
static void
o_assignpop()
{
VALUE *var; /* variable value */
VALUE *vp;
var = &stack[-1];
if (var->v_type != V_ADDR)
error("Assignment into non-variable");
var = var->v_addr;
vp = &stack[0];
if ((vp->v_type == V_ADDR) && (vp->v_addr == var)) {
stack -= 2;
return;
}
freevalue(var);
if (vp->v_type == V_ADDR)
copyvalue(vp->v_addr, var);
else
*var = *vp;
stack -= 2;
}
static void
o_swap()
{
VALUE *v1, *v2; /* variables to be swapped */
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if ((v1->v_type != V_ADDR) || (v2->v_type != V_ADDR))
error("Swapping non-variables");
tmp = v1->v_addr[0];
v1->v_addr[0] = v2->v_addr[0];
v2->v_addr[0] = tmp;
stack--;
stack->v_type = V_NULL;
}
static void
o_add()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM)) {
addvalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
q = qadd(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_sub()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM)) {
subvalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
q = qsub(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_mul()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM)) {
mulvalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
q = qmul(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_power()
{
VALUE *v1, *v2;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
powivalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
}
static void
o_div()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM)) {
divvalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
q = qdiv(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_quo()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM)) {
quovalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
q = qquo(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_mod()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM)) {
modvalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
q = qmod(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_quomod()
{
VALUE *v1, *v2, *v3, *v4;
VALUE valquo, valmod;
BOOL res;
v1 = &stack[-3];
v2 = &stack[-2];
v3 = &stack[-1];
v4 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v3->v_type != V_ADDR) || (v4->v_type != V_ADDR))
error("Non-variable for quomod");
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM))
error("Non-reals for quomod");
v3 = v3->v_addr;
v4 = v4->v_addr;
valquo.v_type = V_NUM;
valmod.v_type = V_NUM;
res = qquomod(v1->v_num, v2->v_num, &valquo.v_num, &valmod.v_num);
freevalue(stack--);
freevalue(stack--);
stack--;
stack->v_num = (res ? qlink(&_qone_) : qlink(&_qzero_));
stack->v_type = V_NUM;
freevalue(v3);
freevalue(v4);
*v3 = valquo;
*v4 = valmod;
}
static void
o_and()
{
VALUE *v1, *v2;
NUMBER *q;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM))
error("Non-numerics for and");
q = qand(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_or()
{
VALUE *v1, *v2;
NUMBER *q;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM))
error("Non-numerics for or");
q = qor(v1->v_num, v2->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_not()
{
VALUE *vp;
int r;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
r = testvalue(vp);
freevalue(stack);
stack->v_num = (r ? qlink(&_qzero_) : qlink(&_qone_));
stack->v_type = V_NUM;
}
static void
o_negate()
{
VALUE *vp;
NUMBER *q;
VALUE tmp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
q = qneg(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
return;
}
negvalue(vp, &tmp);
freevalue(stack);
*stack = tmp;
}
static void
o_invert()
{
VALUE *vp;
NUMBER *q;
VALUE tmp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
q = qinv(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
return;
}
invertvalue(vp, &tmp);
freevalue(stack);
*stack = tmp;
}
static void
o_scale()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[0];
v2 = &stack[-1];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM)) {
scalevalue(v2, v1, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
q = v1->v_num;
if (qisfrac(q))
error("Non-integral scaling factor");
if (isbig(q->num))
error("Very large scaling factor");
q = qscale(v2->v_num, qtoi(q));
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_int()
{
VALUE *vp;
NUMBER *q;
VALUE tmp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
if (qisint(vp->v_num) && (stack->v_type == V_NUM))
return;
q = qint(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
return;
}
intvalue(vp, &tmp);
freevalue(stack);
*stack = tmp;
}
static void
o_frac()
{
VALUE *vp;
NUMBER *q;
VALUE tmp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
q = qfrac(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
return;
}
fracvalue(vp, &tmp);
freevalue(stack);
*stack = tmp;
}
static void
o_abs()
{
VALUE *v1, *v2;
NUMBER *q;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_NUM) || (v2->v_type != V_NUM) ||
!qispos(v2->v_num))
{
absvalue(v1, v2, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
return;
}
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
if ((stack->v_type == V_NUM) && !qisneg(v1->v_num))
return;
q = qabs(v1->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_norm()
{
VALUE *vp;
NUMBER *q;
VALUE tmp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
q = qsquare(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
return;
}
normvalue(vp, &tmp);
freevalue(stack);
*stack = tmp;
}
static void
o_square()
{
VALUE *vp;
NUMBER *q;
VALUE tmp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
q = qsquare(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
return;
}
squarevalue(vp, &tmp);
freevalue(stack);
*stack = tmp;
}
static void
o_istype()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if ((v1->v_type != V_OBJ) || (v2->v_type != V_OBJ))
r = (v1->v_type == v2->v_type);
else
r = (v1->v_obj->o_actions == v2->v_obj->o_actions);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) r);
stack->v_type = V_NUM;
}
static void
o_isint()
{
VALUE *vp;
NUMBER *q;
vp = stack;
if (vp->v_type == V_ADDR)
vp = stack->v_addr;
if (vp->v_type != V_NUM) {
freevalue(stack);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
return;
}
if (qisint(vp->v_num))
q = qlink(&_qone_);
else
q = qlink(&_qzero_);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_isnum()
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
switch (vp->v_type) {
case V_NUM:
if (stack->v_type == V_NUM)
qfree(stack->v_num);
break;
case V_COM:
if (stack->v_type == V_COM)
comfree(stack->v_com);
break;
default:
freevalue(stack);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
return;
}
stack->v_num = qlink(&_qone_);
stack->v_type = V_NUM;
}
static void
o_ismat()
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_MAT) {
freevalue(stack);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
return;
}
freevalue(stack);
stack->v_type = V_NUM;
stack->v_num = qlink(&_qone_);
}
static void
o_islist()
{
VALUE *vp;
int r;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
r = (vp->v_type == V_LIST);
freevalue(stack);
stack->v_num = (r ? qlink(&_qone_) : qlink(&_qzero_));
stack->v_type = V_NUM;
}
static void
o_isobj()
{
VALUE *vp;
int r;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
r = (vp->v_type == V_OBJ);
freevalue(stack);
stack->v_num = (r ? qlink(&_qone_) : qlink(&_qzero_));
stack->v_type = V_NUM;
}
static void
o_isstr()
{
VALUE *vp;
int r;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
r = (vp->v_type == V_STR);
freevalue(stack);
stack->v_num = (r ? qlink(&_qone_) : qlink(&_qzero_));
stack->v_type = V_NUM;
}
static void
o_isfile()
{
VALUE *vp;
int r;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
r = (vp->v_type == V_FILE);
freevalue(stack);
stack->v_num = (r ? qlink(&_qone_) : qlink(&_qzero_));
stack->v_type = V_NUM;
}
static void
o_issimple()
{
VALUE *vp;
int r;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
r = 0;
switch (vp->v_type) {
case V_NULL:
case V_NUM:
case V_COM:
case V_STR:
r = 1;
}
freevalue(stack);
stack->v_num = (r ? qlink(&_qone_) : qlink(&_qzero_));
stack->v_type = V_NUM;
}
static void
o_isodd()
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if ((vp->v_type == V_NUM) && qisodd(vp->v_num)) {
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = qlink(&_qone_);
stack->v_type = V_NUM;
return;
}
freevalue(stack);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
}
static void
o_iseven()
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if ((vp->v_type == V_NUM) && qiseven(vp->v_num)) {
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = qlink(&_qone_);
stack->v_type = V_NUM;
return;
}
freevalue(stack);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
}
static void
o_isreal()
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = qlink(&_qone_);
stack->v_type = V_NUM;
return;
}
freevalue(stack);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
}
static void
o_isnull()
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_NULL) {
freevalue(stack);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
return;
}
freevalue(stack);
stack->v_num = qlink(&_qone_);
stack->v_type = V_NUM;
}
static void
o_re()
{
VALUE *vp;
NUMBER *q;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
if (stack->v_type == V_ADDR) {
stack->v_num = qlink(vp->v_num);
stack->v_type = V_NUM;
}
return;
}
if (vp->v_type != V_COM)
error("Taking real part of non-number");
q = qlink(vp->v_com->real);
if (stack->v_type == V_COM)
comfree(stack->v_com);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_im()
{
VALUE *vp;
NUMBER *q;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = qlink(&_qzero_);
stack->v_type = V_NUM;
return;
}
if (vp->v_type != V_COM)
error("Taking imaginary part of non-number");
q = qlink(vp->v_com->imag);
if (stack->v_type == V_COM)
comfree(stack->v_com);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_conjugate()
{
VALUE *vp;
VALUE tmp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
if (stack->v_type == V_ADDR) {
stack->v_num = qlink(vp->v_num);
stack->v_type = V_NUM;
}
return;
}
conjvalue(vp, &tmp);
freevalue(stack);
*stack = tmp;
}
static void
o_fiaddr()
{
register MATRIX *m; /* current matrix element */
NUMBER *q; /* index value */
LIST *lp; /* list header */
VALUE *vp; /* stack value */
long index; /* index value as an integer */
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_NUM)
error("Fast indexing by non-number");
q = vp->v_num;
if (qisfrac(q))
error("Fast indexing by non-integer");
index = qtoi(q);
if (isbig(q->num) || (index < 0))
error("Index out of range for fast indexing");
if (stack->v_type == V_NUM)
qfree(q);
stack--;
vp = stack;
if (vp->v_type != V_ADDR)
error("Bad value for fast indexing");
switch (vp->v_addr->v_type) {
case V_OBJ:
if (index >= vp->v_addr->v_obj->o_actions->count)
error("Index out of bounds for object");
vp->v_addr = vp->v_addr->v_obj->o_table + index;
break;
case V_MAT:
m = vp->v_addr->v_mat;
if (index >= m->m_size)
error("Index out of bounds for matrix");
vp->v_addr = m->m_table + index;
break;
case V_LIST:
lp = vp->v_addr->v_list;
vp->v_addr = listindex(lp, index);
if (vp->v_addr == NULL)
error("Index out of bounds for list");
break;
default:
error("Bad variable type for fast indexing");
}
}
static void
o_fivalue()
{
(void) o_fiaddr();
(void) o_getvalue();
}
static void
o_sgn()
{
VALUE *vp;
NUMBER *q;
VALUE val;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
switch (vp->v_type) {
case V_NUM:
q = qsign(vp->v_num);
if (stack->v_type == V_NUM)
qfree(vp->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
break;
case V_OBJ:
val = objcall(OBJ_SGN, vp);
q = itoq(val.v_int);
freevalue(stack);
stack->v_num = q;
stack->v_type = V_NUM;
break;
default:
error("Bad value for sgn");
}
}
static void
o_numerator()
{
VALUE *vp;
NUMBER *q;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_NUM)
error("Numerator of non-number");
if ((stack->v_type == V_NUM) && qisint(vp->v_num))
return;
q = qnum(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_denominator()
{
VALUE *vp;
NUMBER *q;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_NUM)
error("Denominator of non-number");
q = qden(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack->v_num = q;
stack->v_type = V_NUM;
}
static void
o_duplicate()
{
copyvalue(stack, stack + 1);
stack++;
}
static void
o_dupvalue()
{
if (stack->v_type == V_ADDR)
copyvalue(stack->v_addr, stack + 1);
else
copyvalue(stack, stack + 1);
stack++;
}
static void
o_pop()
{
freevalue(stack--);
}
static void
o_return()
{
}
/*ARGSUSED*/
static void
o_jumpeq(fp, dojump)
FUNC *fp;
BOOL *dojump;
{
VALUE *vp;
int i; /* result of comparison */
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
i = !qiszero(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
} else {
i = testvalue(vp);
freevalue(stack);
}
stack--;
if (!i)
*dojump = TRUE;
}
/*ARGSUSED*/
static void
o_jumpne(fp, dojump)
FUNC *fp;
BOOL *dojump;
{
VALUE *vp;
int i; /* result of comparison */
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
i = !qiszero(vp->v_num);
if (stack->v_type == V_NUM)
qfree(stack->v_num);
} else {
i = testvalue(vp);
freevalue(stack);
}
stack--;
if (i)
*dojump = TRUE;
}
/*ARGSUSED*/
static void
o_condorjump(fp, dojump)
FUNC *fp;
BOOL *dojump;
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
if (!qiszero(vp->v_num)) {
*dojump = TRUE;
return;
}
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
return;
}
if (testvalue(vp))
*dojump = TRUE;
else
freevalue(stack--);
}
/*ARGSUSED*/
static void
o_condandjump(fp, dojump)
FUNC *fp;
BOOL *dojump;
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type == V_NUM) {
if (qiszero(vp->v_num)) {
*dojump = TRUE;
return;
}
if (stack->v_type == V_NUM)
qfree(stack->v_num);
stack--;
return;
}
if (!testvalue(vp))
*dojump = TRUE;
else
freevalue(stack--);
}
/*
* Compare the top two values on the stack for equality and jump if they are
* different, popping off the top element, leaving the first one on the stack.
* If they are equal, pop both values and do not jump.
*/
/*ARGSUSED*/
static void
o_casejump(fp, dojump)
FUNC *fp;
BOOL *dojump;
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = comparevalue(v1, v2);
freevalue(stack--);
if (r)
*dojump = TRUE;
else
freevalue(stack--);
}
/*ARGSUSED*/
static void
o_jump(fp, dojump)
FUNC *fp;
BOOL *dojump;
{
*dojump = TRUE;
}
static void
o_usercall(fp, index, argcount)
FUNC *fp;
long index, argcount;
{
fp = findfunc(index);
if (fp == NULL)
error("Function \"%s\" is undefined", namefunc(index));
calculate(fp, (int) argcount);
}
/*ARGSUSED*/
static void
o_call(fp, index, argcount)
FUNC *fp;
long index, argcount;
{
VALUE result;
result = builtinfunc(index, (int) argcount, stack);
while (--argcount >= 0)
freevalue(stack--);
stack++;
*stack = result;
}
static void
o_getvalue()
{
if (stack->v_type == V_ADDR)
copyvalue(stack->v_addr, stack);
}
static void
o_cmp()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = relvalue(v1, v2);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) r);
stack->v_type = V_NUM;
}
static void
o_eq()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = comparevalue(v1, v2);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) (r == 0));
stack->v_type = V_NUM;
}
static void
o_ne()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = comparevalue(v1, v2);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) (r != 0));
stack->v_type = V_NUM;
}
static void
o_le()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = relvalue(v1, v2);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) (r <= 0));
stack->v_type = V_NUM;
}
static void
o_ge()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = relvalue(v1, v2);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) (r >= 0));
stack->v_type = V_NUM;
}
static void
o_lt()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = relvalue(v1, v2);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) (r < 0));
stack->v_type = V_NUM;
}
static void
o_gt()
{
VALUE *v1, *v2;
int r;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
r = relvalue(v1, v2);
freevalue(stack--);
freevalue(stack);
stack->v_num = itoq((long) (r > 0));
stack->v_type = V_NUM;
}
static void
o_preinc()
{
NUMBER *q, **np;
VALUE *vp, tmp;
if (stack->v_type != V_ADDR)
error("Preincrementing non-variable");
if (stack->v_addr->v_type == V_NUM) {
np = &stack->v_addr->v_num;
q = qinc(*np);
qfree(*np);
*np = q;
stack->v_type = V_NUM;
stack->v_num = qlink(q);
return;
}
vp = stack->v_addr;
incvalue(vp, &tmp);
freevalue(vp);
*vp = tmp;
copyvalue(&tmp, stack);
}
static void
o_predec()
{
NUMBER *q, **np;
VALUE *vp, tmp;
if (stack->v_type != V_ADDR)
error("Predecrementing non-variable");
if (stack->v_addr->v_type == V_NUM) {
np = &stack->v_addr->v_num;
q = qdec(*np);
qfree(*np);
*np = q;
stack->v_type = V_NUM;
stack->v_num = qlink(q);
return;
}
vp = stack->v_addr;
decvalue(vp, &tmp);
freevalue(vp);
*vp = tmp;
copyvalue(&tmp, stack);
}
static void
o_postinc()
{
NUMBER *q, **np;
VALUE *vp, tmp;
if (stack->v_type != V_ADDR)
error("Postincrementing non-variable");
if (stack->v_addr->v_type == V_NUM) {
np = &stack->v_addr->v_num;
q = *np;
*np = qinc(q);
stack->v_type = V_NUM;
stack->v_num = q;
return;
}
vp = stack->v_addr;
tmp = *vp;
incvalue(&tmp, vp);
*stack = tmp;
}
static void
o_postdec()
{
NUMBER *q, **np;
VALUE *vp, tmp;
if (stack->v_type != V_ADDR)
error("Postdecrementing non-variable");
if (stack->v_addr->v_type == V_NUM) {
np = &stack->v_addr->v_num;
q = *np;
*np = qdec(q);
stack->v_type = V_NUM;
stack->v_num = q;
return;
}
vp = stack->v_addr;
tmp = *vp;
decvalue(&tmp, vp);
*stack = tmp;
}
static void
o_leftshift()
{
VALUE *v1, *v2;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
shiftvalue(v1, v2, FALSE, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
}
static void
o_rightshift()
{
VALUE *v1, *v2;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
shiftvalue(v1, v2, TRUE, &tmp);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
}
/*ARGSUSED*/
static void
o_debug(fp, line)
FUNC *fp;
long line;
{
funcline = line;
if (abortlevel >= ABORT_STATEMENT)
error("Calculation aborted at statement boundary");
}
static void
o_printresult()
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_NULL) {
math_chr('\t');
printvalue(vp, PRINT_UNAMBIG);
math_chr('\n');
math_flush();
}
freevalue(stack--);
}
/*ARGSUSED*/
static void
o_print(fp, flags)
FUNC *fp;
long flags;
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
printvalue(vp, (int) flags);
freevalue(stack--);
if (traceflags & TRACE_OPCODES)
printf("\n");
math_flush();
}
static void
o_printeol()
{
math_chr('\n');
math_flush();
}
static void
o_printspace()
{
math_chr(' ');
if (traceflags & TRACE_OPCODES)
printf("\n");
}
/*ARGSUSED*/
static void
o_printstring(fp, cp)
FUNC *fp;
char *cp;
{
math_str(cp);
if (traceflags & TRACE_OPCODES)
printf("\n");
math_flush();
}
static void
o_zero()
{
stack++;
stack->v_type = V_NUM;
stack->v_num = qlink(&_qzero_);
}
static void
o_one()
{
stack++;
stack->v_type = V_NUM;
stack->v_num = qlink(&_qone_);
}
static void
o_save(fp)
FUNC *fp;
{
VALUE *vp;
vp = stack;
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
freevalue(&fp->f_savedvalue);
copyvalue(vp, &fp->f_savedvalue);
}
static void
o_oldvalue()
{
copyvalue(&oldvalue, ++stack);
}
static void
o_quit(fp, cp)
FUNC *fp;
char *cp;
{
if ((fp->f_name[0] == '*') && (fp->f_name[1] == '\0')) {
if (cp)
printf("%s\n", cp);
hist_term();
exit(0);
}
if (cp)
error("%s", cp);
error("quit statement executed");
}
static void
o_getepsilon()
{
stack++;
stack->v_type = V_NUM;
stack->v_num = qlink(_epsilon_);
}
static void
o_setepsilon()
{
VALUE *vp;
NUMBER *new;
vp = &stack[0];
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_NUM)
error("Non-numeric for epsilon");
new = vp->v_num;
stack->v_num = qlink(_epsilon_);
setepsilon(new);
qfree(new);
}
static void
o_setconfig()
{
int type;
VALUE *v1, *v2;
VALUE tmp;
v1 = &stack[-1];
v2 = &stack[0];
if (v1->v_type == V_ADDR)
v1 = v1->v_addr;
if (v2->v_type == V_ADDR)
v2 = v2->v_addr;
if (v1->v_type != V_STR)
error("Non-string for config");
type = configtype(v1->v_str);
if (type < 0)
error("Unknown config name \"%s\"", v1->v_str);
getconfig(type, &tmp);
setconfig(type, v2);
freevalue(stack--);
freevalue(stack);
*stack = tmp;
}
static void
o_getconfig()
{
int type;
VALUE *vp;
vp = &stack[0];
if (vp->v_type == V_ADDR)
vp = vp->v_addr;
if (vp->v_type != V_STR)
error("Non-string for config");
type = configtype(vp->v_str);
if (type < 0)
error("Unknown config name \"%s\"", vp->v_str);
freevalue(stack);
getconfig(type, stack);
}
/*
* Set the 'old' value to the last value saved during the calculation.
*/
void
updateoldvalue(fp)
FUNC *fp;
{
if (fp->f_savedvalue.v_type == V_NULL)
return;
freevalue(&oldvalue);
oldvalue = fp->f_savedvalue;
fp->f_savedvalue.v_type = V_NULL;
return;
}
/*
* Routine called on any runtime error, to complain about it (with possible
* arguments), and then longjump back to the top level command scanner.
*/
#ifdef VARARGS
# define VA_ALIST fmt, va_alist
# define VA_DCL char *fmt; va_dcl
#else
# ifdef __STDC__
# define VA_ALIST char *fmt, ...
# define VA_DCL
# else
# define VA_ALIST fmt
# define VA_DCL char *fmt;
# endif
#endif
/*VARARGS*/
void
error(VA_ALIST)
VA_DCL
{
va_list ap;
char buf[MAXERROR+1];
if (funcname && (*funcname != '*'))
fprintf(stderr, "\"%s\": ", funcname);
if (funcline && ((funcname && (*funcname != '*')) || !inputisterminal()))
fprintf(stderr, "line %ld: ", funcline);
#ifdef VARARGS
va_start(ap);
#else
va_start(ap, fmt);
#endif
vsprintf(buf, fmt, ap);
va_end(ap);
fprintf(stderr, "%s\n", buf);
funcname = NULL;
longjmp(jmpbuf, 1);
return;
}
/* END CODE */