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functionobj.c
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functionobj.c
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/*
$Id: functionobj.c 860 2014-11-22 20:55:21Z soci $
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.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include <math.h>
#include "values.h"
#include "isnprintf.h"
#include "functionobj.h"
#include "eval.h"
#include "variables.h"
#include "floatobj.h"
static struct obj_s obj;
obj_t FUNCTION_OBJ = &obj;
static int same(const value_t v1, const value_t v2) {
return v2->obj == FUNCTION_OBJ && v1->u.function.func == v2->u.function.func;
}
static MUST_CHECK value_t hash(const value_t v1, int *hs, linepos_t UNUSED(epoint)) {
*hs = v1->u.function.name_hash;
return NULL;
}
static MUST_CHECK value_t repr(const value_t v1, linepos_t epoint) {
uint8_t *s;
const char *prefix;
size_t len;
value_t v;
if (!epoint) return NULL;
prefix = "<native_function '";
len = strlen(prefix);
v = val_alloc(STR_OBJ);
v->u.str.len = v1->u.function.name.len + 2 + len;
if (v->u.str.len < (2 + len)) err_msg_out_of_memory(); /* overflow */
v->u.str.chars = v->u.str.len;
s = str_create_elements(v, v->u.str.len);
memcpy(s, prefix, len);
memcpy(s + len, v1->u.function.name.data, v1->u.function.name.len);
s[v->u.str.len - 2] = '\'';
s[v->u.str.len - 1] = '>';
v->u.str.data = s;
return v;
}
/* range([start],end,[step]) */
static inline MUST_CHECK value_t function_range(value_t vals, linepos_t epoint) {
struct values_s *v = vals->u.funcargs.val;
size_t args = vals->u.funcargs.len;
value_t err, new_value;
ival_t start = 0, end, step = 1;
size_t i = 0, len2;
value_t *val;
if (args < 1 || args > 3) {
err_msg_argnum(args, 1, 3, epoint);
return val_reference(none_value);
}
switch (args) {
case 1:
err = v[0].val->obj->ival(v[0].val, &end, 8*sizeof(ival_t), &v[0].epoint);
break;
case 3:
err = v[2].val->obj->ival(v[2].val, &step, 8*sizeof(ival_t), &v[2].epoint);
if (err) return err;
case 2:
err = v[0].val->obj->ival(v[0].val, &start, 8*sizeof(ival_t), &v[0].epoint);
if (err) return err;
err = v[1].val->obj->ival(v[1].val, &end, 8*sizeof(ival_t), &v[1].epoint);
break;
}
if (err) return err;
if (step == 0) {
return new_error_obj(ERROR_NO_ZERO_VALUE, &v[2].epoint);
}
if (step > 0) {
if (end < start) end = start;
len2 = (end - start + step - 1) / step;
} else {
if (end > start) end = start;
len2 = (start - end - step - 1) / -step;
}
new_value = val_alloc(LIST_OBJ);
val = list_create_elements(new_value, len2);
if (len2) {
i = 0;
while ((end > start && step > 0) || (end < start && step < 0)) {
val[i] = int_from_ival(start);
i++; start += step;
}
}
new_value->u.list.len = len2;
new_value->u.list.data = val;
return new_value;
}
static MUST_CHECK value_t apply_func(value_t v1, enum func_e func, linepos_t epoint) {
value_t err, v;
double real;
switch (func) {
case F_ANY: return v1->obj->truth(v1, TRUTH_ANY, epoint);
case F_ALL: return v1->obj->truth(v1, TRUTH_ALL, epoint);
case F_LEN: return v1->obj->len(v1, epoint);
default: break;
}
if (v1->obj == TUPLE_OBJ || v1->obj == LIST_OBJ) {
if (v1->u.list.len) {
int error = 1;
size_t i;
value_t *vals;
v = val_alloc(v1->obj);
vals = list_create_elements(v, v1->u.list.len);
for (i = 0; i < v1->u.list.len; i++) {
value_t val = apply_func(v1->u.list.data[i], func, epoint);
if (val->obj == ERROR_OBJ) { if (error) {err_msg_output(val); error = 0;} val_destroy(val); val = val_reference(none_value); }
vals[i] = val;
}
v->u.list.len = i;
v->u.list.data = vals;
return v;
}
return val_reference(v1);
}
switch (func) {
case F_SIZE: return v1->obj->size(v1, epoint);
case F_SIGN: return v1->obj->sign(v1, epoint);
case F_ABS: return v1->obj->abs(v1, epoint);
case F_REPR: return v1->obj->repr(v1, epoint);
default: break;
}
err = FLOAT_OBJ->create(v1, epoint);
if (err->obj != FLOAT_OBJ) return err;
real = err->u.real;
val_destroy(err);
switch (func) {
case F_FLOOR: real = floor(real);break;
case F_CEIL: real = ceil(real);break;
case F_SQRT:
if (real < 0.0) {
return new_error_obj(ERROR_SQUARE_ROOT_N, epoint);
}
real = sqrt(real);
break;
case F_LOG10:
if (real <= 0.0) {
return new_error_obj(ERROR_LOG_NON_POSIT, epoint);
}
real = log10(real);
break;
case F_LOG:
if (real <= 0.0) {
return new_error_obj(ERROR_LOG_NON_POSIT, epoint);
}
real = log(real);
break;
case F_EXP: real = exp(real);break;
case F_SIN: real = sin(real);break;
case F_COS: real = cos(real);break;
case F_TAN: real = tan(real);break;
case F_ACOS:
if (real < -1.0 || real > 1.0) {
return new_error_obj(ERROR___MATH_DOMAIN, epoint);
}
real = acos(real);
break;
case F_ASIN:
if (real < -1.0 || real > 1.0) {
return new_error_obj(ERROR___MATH_DOMAIN, epoint);
}
real = asin(real);
break;
case F_ATAN: real = atan(real);break;
case F_CBRT: real = cbrt(real);break;
case F_ROUND: real = round(real);break;
case F_TRUNC: real = trunc(real);break;
case F_FRAC: real -= trunc(real);break;
case F_RAD: real = real * M_PI / 180.0;break;
case F_DEG: real = real * 180.0 / M_PI;break;
case F_COSH: real = cosh(real);break;
case F_SINH: real = sinh(real);break;
case F_TANH: real = tanh(real);break;
default: real = HUGE_VAL; break; /* can't happen */
}
return float_from_double2(real, epoint);
}
static MUST_CHECK value_t apply_func2(oper_t op, enum func_e func) {
value_t err, v, v1 = op->v1, v2 = op->v2, val, *vals;
double real, real2;
if (v1->obj == TUPLE_OBJ || v1->obj == LIST_OBJ) {
size_t i;
if (v1->obj == v2->obj) {
if (v1->u.list.len == v2->u.list.len) {
if (v1->u.list.len) {
int error = 1;
v = val_alloc(v1->obj);
vals = list_create_elements(v, v1->u.list.len);
for (i = 0; i < v1->u.list.len; i++) {
op->v1 = v1->u.list.data[i];
op->v2 = v2->u.list.data[i];
val = apply_func2(op, func);
if (val->obj == ERROR_OBJ) { if (error) {err_msg_output(val); error = 0;} val_destroy(val); val = val_reference(none_value); }
vals[i] = val;
}
op->v1 = v1;
op->v2 = v2;
v->u.list.len = i;
v->u.list.data = vals;
return v;
}
return val_reference(v1);
}
if (v1->u.list.len == 1) {
op->v1 = v1->u.list.data[0];
v = apply_func2(op, func);
op->v1 = v1;
return v;
}
if (v2->u.list.len == 1) {
op->v2 = v2->u.list.data[0];
v = apply_func2(op, func);
op->v2 = v2;
return v;
}
v = new_error_obj(ERROR_CANT_BROADCAS, op->epoint3);
v->u.error.u.broadcast.v1 = v1->u.list.len;
v->u.error.u.broadcast.v2 = v2->u.list.len;
return v;
}
if (v1->u.list.len) {
int error = 1;
v = val_alloc(v1->obj);
vals = list_create_elements(v, v1->u.list.len);
for (i = 0; i < v1->u.list.len; i++) {
op->v1 = v1->u.list.data[i];
val = apply_func2(op, func);
if (val->obj == ERROR_OBJ) { if (error) {err_msg_output(val); error = 0;} val_destroy(val); val = val_reference(none_value); }
vals[i] = val;
}
op->v1 = v1;
v->u.list.len = i;
v->u.list.data = vals;
return v;
}
return val_reference(v1);
}
if (v2->obj == TUPLE_OBJ || v2->obj == LIST_OBJ) {
if (v2->u.list.len) {
int error = 1;
size_t i;
v = val_alloc(v2->obj);
vals = list_create_elements(v, v2->u.list.len);
for (i = 0; i < v2->u.list.len; i++) {
op->v2 = v2->u.list.data[i];
val = apply_func2(op, func);
if (val->obj == ERROR_OBJ) { if (error) {err_msg_output(val); error = 0;} val_destroy(val); val = val_reference(none_value); }
vals[i] = val;
}
op->v2 = v2;
v->u.list.len = i;
v->u.list.data = vals;
return v;
}
return val_reference(v2);
}
err = FLOAT_OBJ->create(v1, op->epoint);
if (err->obj != FLOAT_OBJ) return err;
real = err->u.real;
val_destroy(err);
err = FLOAT_OBJ->create(v2, op->epoint2);
if (err->obj != FLOAT_OBJ) return err;
real2 = err->u.real;
val_destroy(err);
switch (func) {
case F_HYPOT: real = hypot(real, real2); break;
case F_ATAN2: real = atan2(real, real2);break;
case F_POW:
if (real2 < 0.0 && !real) {
return new_error_obj(ERROR_DIVISION_BY_Z, op->epoint3);
}
if (real < 0.0 && (double)((int)real2) != real2) {
return new_error_obj(ERROR_NEGFRAC_POWER, op->epoint3);
}
real = pow(real, real2);
break;
default: real = HUGE_VAL; break;
}
return float_from_double2(real, op->epoint3);
}
static MUST_CHECK value_t calc2(oper_t op) {
value_t v1 = op->v1, v2 = op->v2;
enum func_e func;
struct values_s *v;
size_t args;
struct oper_s oper;
switch (v2->obj->type) {
case T_FUNCTION:
switch (op->op->u.oper.op) {
case O_CMP:
if (v1->u.function.func < v1->u.function.func) return int_from_int(-1);
return val_reference(int_value[v1->u.function.func > v2->u.function.func]);
case O_EQ: return truth_reference(v1->u.function.func == v2->u.function.func);
case O_NE: return truth_reference(v1->u.function.func != v2->u.function.func);
case O_LT: return truth_reference(v1->u.function.func < v2->u.function.func);
case O_LE: return truth_reference(v1->u.function.func <= v2->u.function.func);
case O_GT: return truth_reference(v1->u.function.func > v2->u.function.func);
case O_GE: return truth_reference(v1->u.function.func >= v2->u.function.func);
default: break;
}
break;
case T_FUNCARGS:
v = v2->u.funcargs.val;
args = v2->u.funcargs.len;
switch (op->op->u.oper.op) {
case O_FUNC:
func = v1->u.function.func;
switch (func) {
case F_HYPOT:
case F_ATAN2:
case F_POW:
if (args != 2) {
err_msg_argnum(args, 2, 2, op->epoint2);
return val_reference(none_value);
}
oper.v1 = v[0].val;
oper.v2 = v[1].val;
oper.epoint = &v[0].epoint;
oper.epoint2 = &v[1].epoint;
oper.epoint3 = op->epoint;
return apply_func2(&oper, func);
case F_RANGE: return function_range(v2, op->epoint2);
case F_FORMAT: return isnprintf(v2, op->epoint);
default:
if (args != 1) {
err_msg_argnum(args, 1, 1, op->epoint2);
return val_reference(none_value);
}
return apply_func(v[0].val, func, &v[0].epoint);
}
default: break;
}
break;
case T_NONE:
case T_ERROR:
case T_LIST:
case T_TUPLE:
case T_DICT:
if (op->op != &o_MEMBER && op->op != &o_INDEX && op->op != &o_X) {
return v2->obj->rcalc2(op);
}
default: break;
}
return obj_oper_error(op);
}
struct builtin_functions_s builtin_functions[] = {
{"abs", F_ABS},
{"acos", F_ACOS},
{"all", F_ALL},
{"any", F_ANY},
{"asin", F_ASIN},
{"atan", F_ATAN},
{"atan2", F_ATAN2},
{"cbrt", F_CBRT},
{"ceil", F_CEIL},
{"cos", F_COS},
{"cosh", F_COSH},
{"deg", F_DEG},
{"exp", F_EXP},
{"floor", F_FLOOR},
{"frac", F_FRAC},
{"hypot", F_HYPOT},
{"len", F_LEN},
{"log", F_LOG},
{"log10", F_LOG10},
{"pow", F_POW},
{"rad", F_RAD},
{"range", F_RANGE},
{"repr", F_REPR},
{"round", F_ROUND},
{"sign", F_SIGN},
{"sin", F_SIN},
{"sinh", F_SINH},
{"size", F_SIZE},
{"sqrt", F_SQRT},
{"tan", F_TAN},
{"tanh", F_TANH},
{"trunc", F_TRUNC},
{"format", F_FORMAT},
{NULL, F_NONE}
};
void functionobj_init(void) {
obj_init(&obj, T_FUNCTION, "function");
obj.hash = hash;
obj.same = same;
obj.repr = repr;
obj.calc2 = calc2;
}