gnuplot-old/src/internal.c at gnuplot-4-4-alpha · gnuplot/gnuplot-old · GitHub

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#ifndef lint

static char *RCSid() { return RCSid("$Id: internal.c,v 1.51 2008/09/25 18:33:50 sfeam Exp $"); }

#endif

/* GNUPLOT - internal.c */

/*[

* Permission to use, copy, and distribute this software and its

* documentation for any purpose with or without fee is hereby granted,

* provided that the above copyright notice appear in all copies and

* that both that copyright notice and this permission notice appear

* in supporting documentation.

* Permission to modify the software is granted, but not the right to

* distribute the complete modified source code. Modifications are to

* be distributed as patches to the released version. Permission to

* distribute binaries produced by compiling modified sources is granted,

* provided you

* 1. distribute the corresponding source modifications from the

* released version in the form of a patch file along with the binaries,

* 2. add special version identification to distinguish your version

* in addition to the base release version number,

* 3. provide your name and address as the primary contact for the

* support of your modified version, and

* 4. retain our contact information in regard to use of the base

* software.

* Permission to distribute the released version of the source code along

* with corresponding source modifications in the form of a patch file is

* granted with same provisions 2 through 4 for binary distributions.

* This software is provided "as is" without express or implied warranty

* to the extent permitted by applicable law.

]*/

#include "internal.h"

#include "stdfn.h"

#include "alloc.h"

#include "util.h" /* for int_error() */

# include "gp_time.h" /* for str(p|f)time */

#include "command.h" /* for do_system_func */

#include "variable.h" /* For locale handling */

#include <math.h>

* Excerpt from the Solaris man page for matherr():

* The The System V Interface Definition, Third Edition (SVID3)

* specifies that certain libm functions call matherr() when

* exceptions are detected. Users may define their own mechan-

* isms for handling exceptions, by including a function named

* matherr() in their programs.

static enum DATA_TYPES sprintf_specifier __PROTO((const char *format));

int

GP_MATHERR( STRUCT_EXCEPTION_P_X )

{

return (undefined = TRUE); /* don't print error message */

}

#define BAD_DEFAULT default: int_error(NO_CARET, "internal error : type neither INT or CMPLX"); return;

void

f_push(union argument *x)

{

struct udvt_entry *udv;

udv = x->udv_arg;

if (udv->udv_undef) { /* undefined */

int_error(NO_CARET, "undefined variable: %s", udv->udv_name);

}

push(&(udv->udv_value));

}

void

f_pushc(union argument *x)

{

push(&(x->v_arg));

}

void

f_pushd1(union argument *x)

{

push(&(x->udf_arg->dummy_values[0]));

}

void

f_pop(union argument *x)

{

struct value dummy;

pop(&dummy);

gpfree_string(&dummy);

}

void

f_pushd2(union argument *x)

{

push(&(x->udf_arg->dummy_values[1]));

}

void

f_pushd(union argument *x)

{

struct value param;

(void) pop(&param);

push(&(x->udf_arg->dummy_values[param.v.int_val]));

}

/* execute a udf */

void

f_call(union argument *x)

{

struct udft_entry *udf;

struct value save_dummy;

udf = x->udf_arg;

if (!udf->at) { /* undefined */

int_error(NO_CARET, "undefined function: %s", udf->udf_name);

}

save_dummy = udf->dummy_values[0];

(void) pop(&(udf->dummy_values[0]));

if (udf->dummy_num != 1)

int_error(NO_CARET, "function %s requires %d variables", udf->udf_name, udf->dummy_num);

execute_at(udf->at);

gpfree_string(&udf->dummy_values[0]);

udf->dummy_values[0] = save_dummy;

}

/* execute a udf of n variables */

void

f_calln(union argument *x)

{

struct udft_entry *udf;

struct value save_dummy[MAX_NUM_VAR];

int i;

int num_pop;

struct value num_params;

udf = x->udf_arg;

if (!udf->at) /* undefined */

int_error(NO_CARET, "undefined function: %s", udf->udf_name);

for (i = 0; i < MAX_NUM_VAR; i++)

save_dummy[i] = udf->dummy_values[i];

(void) pop(&num_params);

if (num_params.v.int_val != udf->dummy_num)

int_error(NO_CARET, "function %s requires %d variable%c",

udf->udf_name, udf->dummy_num, (udf->dummy_num == 1)?'\0':'s');

/* if there are more parameters than the function is expecting */

/* simply ignore the excess */

if (num_params.v.int_val > MAX_NUM_VAR) {

/* pop and discard the dummies that there is no room for */

num_pop = num_params.v.int_val - MAX_NUM_VAR;

for (i = 0; i < num_pop; i++)

(void) pop(&(udf->dummy_values[0]));

num_pop = MAX_NUM_VAR;

} else {

num_pop = num_params.v.int_val;

}

/* pop parameters we can use */

for (i = num_pop - 1; i >= 0; i--)

(void) pop(&(udf->dummy_values[i]));

execute_at(udf->at);

for (i = 0; i < MAX_NUM_VAR; i++) {

gpfree_string(&udf->dummy_values[i]);

udf->dummy_values[i] = save_dummy[i];

}

void

f_lnot(union argument *arg)

{

struct value a;

(void) arg; /* avoid -Wunused warning */

int_check(pop(&a));

push(Ginteger(&a, !a.v.int_val));

}

void

f_bnot(union argument *arg)

{

struct value a;

(void) arg; /* avoid -Wunused warning */

int_check(pop(&a));

push(Ginteger(&a, ~a.v.int_val));

}

void

f_lor(union argument *arg)

{

struct value a, b;

(void) arg; /* avoid -Wunused warning */

int_check(pop(&b));

int_check(pop(&a));

push(Ginteger(&a, a.v.int_val || b.v.int_val));

}

void

f_land(union argument *arg)

{

struct value a, b;

(void) arg; /* avoid -Wunused warning */

int_check(pop(&b));

int_check(pop(&a));

push(Ginteger(&a, a.v.int_val && b.v.int_val));

}

void

f_bor(union argument *arg)

{

struct value a, b;

(void) arg; /* avoid -Wunused warning */

int_check(pop(&b));

int_check(pop(&a));

push(Ginteger(&a, a.v.int_val | b.v.int_val));

}

void

f_xor(union argument *arg)

{

struct value a, b;

(void) arg; /* avoid -Wunused warning */

int_check(pop(&b));

int_check(pop(&a));

push(Ginteger(&a, a.v.int_val ^ b.v.int_val));

}

void

f_band(union argument *arg)

{

struct value a, b;

(void) arg; /* avoid -Wunused warning */

int_check(pop(&b));

int_check(pop(&a));

push(Ginteger(&a, a.v.int_val & b.v.int_val));

}

* Make all the following internal routines perform autoconversion

* from string to numeric value.

#define pop(x) pop_or_convert_from_string(x)

void

f_uminus(union argument *arg)

{

struct value a;

(void) arg; /* avoid -Wunused warning */

(void) pop(&a);

switch (a.type) {

case INTGR:

a.v.int_val = -a.v.int_val;

break;

case CMPLX:

a.v.cmplx_val.real =

-a.v.cmplx_val.real;

a.v.cmplx_val.imag =

-a.v.cmplx_val.imag;

break;

BAD_DEFAULT

}

push(&a);

}

void

f_eq(union argument *arg)

{

/* note: floating point equality is rare because of roundoff error! */

struct value a, b;

int result = 0;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

result = (a.v.int_val ==

b.v.int_val);

break;

case CMPLX:

result = (a.v.int_val ==

b.v.cmplx_val.real &&

b.v.cmplx_val.imag == 0.0);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

result = (b.v.int_val == a.v.cmplx_val.real &&

a.v.cmplx_val.imag == 0.0);

break;

case CMPLX:

result = (a.v.cmplx_val.real ==

b.v.cmplx_val.real &&

a.v.cmplx_val.imag ==

b.v.cmplx_val.imag);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(Ginteger(&a, result));

}

void

f_ne(union argument *arg)

{

struct value a, b;

int result = 0;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

result = (a.v.int_val !=

b.v.int_val);

break;

case CMPLX:

result = (a.v.int_val !=

b.v.cmplx_val.real ||

b.v.cmplx_val.imag != 0.0);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

result = (b.v.int_val !=

a.v.cmplx_val.real ||

a.v.cmplx_val.imag != 0.0);

break;

case CMPLX:

result = (a.v.cmplx_val.real !=

b.v.cmplx_val.real ||

a.v.cmplx_val.imag !=

b.v.cmplx_val.imag);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(Ginteger(&a, result));

}

void

f_gt(union argument *arg)

{

struct value a, b;

int result = 0;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

result = (a.v.int_val >

b.v.int_val);

break;

case CMPLX:

result = (a.v.int_val >

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

result = (a.v.cmplx_val.real >

b.v.int_val);

break;

case CMPLX:

result = (a.v.cmplx_val.real >

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(Ginteger(&a, result));

}

void

f_lt(union argument *arg)

{

struct value a, b;

int result = 0;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

result = (a.v.int_val <

b.v.int_val);

break;

case CMPLX:

result = (a.v.int_val <

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

result = (a.v.cmplx_val.real <

b.v.int_val);

break;

case CMPLX:

result = (a.v.cmplx_val.real <

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(Ginteger(&a, result));

}

void

f_ge(union argument *arg)

{

struct value a, b;

int result = 0;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

result = (a.v.int_val >=

b.v.int_val);

break;

case CMPLX:

result = (a.v.int_val >=

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

result = (a.v.cmplx_val.real >=

b.v.int_val);

break;

case CMPLX:

result = (a.v.cmplx_val.real >=

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(Ginteger(&a, result));

}

void

f_le(union argument *arg)

{

struct value a, b;

int result = 0;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

result = (a.v.int_val <=

b.v.int_val);

break;

case CMPLX:

result = (a.v.int_val <=

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

result = (a.v.cmplx_val.real <=

b.v.int_val);

break;

case CMPLX:

result = (a.v.cmplx_val.real <=

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(Ginteger(&a, result));

}

void

f_plus(union argument *arg)

{

struct value a, b, result;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

(void) Ginteger(&result, a.v.int_val +

b.v.int_val);

break;

case CMPLX:

(void) Gcomplex(&result, a.v.int_val +

b.v.cmplx_val.real,

b.v.cmplx_val.imag);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

(void) Gcomplex(&result, b.v.int_val +

a.v.cmplx_val.real,

a.v.cmplx_val.imag);

break;

case CMPLX:

(void) Gcomplex(&result, a.v.cmplx_val.real +

b.v.cmplx_val.real,

a.v.cmplx_val.imag +

b.v.cmplx_val.imag);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(&result);

}

void

f_minus(union argument *arg)

{

struct value a, b, result;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a); /* now do a - b */

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

(void) Ginteger(&result, a.v.int_val -

b.v.int_val);

break;

case CMPLX:

(void) Gcomplex(&result, a.v.int_val -

b.v.cmplx_val.real,

-b.v.cmplx_val.imag);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

(void) Gcomplex(&result, a.v.cmplx_val.real -

b.v.int_val,

a.v.cmplx_val.imag);

break;

case CMPLX:

(void) Gcomplex(&result, a.v.cmplx_val.real -

b.v.cmplx_val.real,

a.v.cmplx_val.imag -

b.v.cmplx_val.imag);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(&result);

}

void

f_mult(union argument *arg)

{

struct value a, b, result;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a); /* now do a*b */

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

(void) Ginteger(&result, a.v.int_val *

b.v.int_val);

break;

case CMPLX:

(void) Gcomplex(&result, a.v.int_val *

b.v.cmplx_val.real,

a.v.int_val *

b.v.cmplx_val.imag);

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

(void) Gcomplex(&result, b.v.int_val *

a.v.cmplx_val.real,

b.v.int_val *

a.v.cmplx_val.imag);

break;

case CMPLX:

(void) Gcomplex(&result, a.v.cmplx_val.real *

b.v.cmplx_val.real -

a.v.cmplx_val.imag *

b.v.cmplx_val.imag,

a.v.cmplx_val.real *

b.v.cmplx_val.imag +

a.v.cmplx_val.imag *

b.v.cmplx_val.real);

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(&result);

}

void

f_div(union argument *arg)

{

struct value a, b, result;

double square;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a); /* now do a/b */

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

if (b.v.int_val)

(void) Ginteger(&result, a.v.int_val /

b.v.int_val);

else {

(void) Ginteger(&result, 0);

undefined = TRUE;

}

break;

case CMPLX:

square = b.v.cmplx_val.real *

b.v.cmplx_val.real +

b.v.cmplx_val.imag *

b.v.cmplx_val.imag;

if (square)

(void) Gcomplex(&result, a.v.int_val *

b.v.cmplx_val.real / square,

-a.v.int_val *

b.v.cmplx_val.imag / square);

else {

(void) Gcomplex(&result, 0.0, 0.0);

undefined = TRUE;

}

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

if (b.v.int_val)

(void) Gcomplex(&result, a.v.cmplx_val.real /

b.v.int_val,

a.v.cmplx_val.imag /

b.v.int_val);

else {

(void) Gcomplex(&result, 0.0, 0.0);

undefined = TRUE;

}

break;

case CMPLX:

square = b.v.cmplx_val.real *

b.v.cmplx_val.real +

b.v.cmplx_val.imag *

b.v.cmplx_val.imag;

if (square)

(void) Gcomplex(&result, (a.v.cmplx_val.real *

b.v.cmplx_val.real +

a.v.cmplx_val.imag *

b.v.cmplx_val.imag) / square,

(a.v.cmplx_val.imag *

b.v.cmplx_val.real -

a.v.cmplx_val.real *

b.v.cmplx_val.imag) /

square);

else {

(void) Gcomplex(&result, 0.0, 0.0);

undefined = TRUE;

}

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(&result);

}

void

f_mod(union argument *arg)

{

struct value a, b;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a); /* now do a%b */

if (a.type != INTGR || b.type != INTGR)

int_error(NO_CARET, "can only mod ints");

if (b.v.int_val)

push(Ginteger(&a, a.v.int_val % b.v.int_val));

else {

push(Ginteger(&a, 0));

undefined = TRUE;

}

void

f_power(union argument *arg)

{

struct value a, b, result;

int i, t, count;

double mag, ang;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a); /* now find a**b */

switch (a.type) {

case INTGR:

switch (b.type) {

case INTGR:

count = abs(b.v.int_val);

t = 1;

/* this ought to use bit-masks and squares, etc */

for (i = 0; i < count; i++)

t *= a.v.int_val;

if (b.v.int_val >= 0)

(void) Ginteger(&result, t);

else if (t != 0)

(void) Gcomplex(&result, 1.0 / t, 0.0);

else {

undefined = TRUE;

(void) Gcomplex(&result, 0.0, 0.0);

}

break;

case CMPLX:

if (a.v.int_val == 0) {

if (b.v.cmplx_val.imag != 0 || b.v.cmplx_val.real < 0) {

undefined = TRUE;

}

/* return 1.0 for 0**0 */

Gcomplex(&result, b.v.cmplx_val.real == 0 ? 1.0 : 0.0, 0.0);

} else {

mag =

pow(magnitude(&a), fabs(b.v.cmplx_val.real));

if (b.v.cmplx_val.real < 0.0) {

if (mag != 0.0)

mag = 1.0 / mag;

else

undefined = TRUE;

}

mag *= gp_exp(-b.v.cmplx_val.imag * angle(&a));

ang = b.v.cmplx_val.real * angle(&a) +

b.v.cmplx_val.imag * log(magnitude(&a));

(void) Gcomplex(&result, mag * cos(ang),

mag * sin(ang));

}

break;

BAD_DEFAULT

}

break;

case CMPLX:

switch (b.type) {

case INTGR:

if (a.v.cmplx_val.imag == 0.0) {

mag = pow(a.v.cmplx_val.real, (double) abs(b.v.int_val));

if (b.v.int_val < 0) {

if (mag != 0.0)

mag = 1.0 / mag;

else

undefined = TRUE;

}

(void) Gcomplex(&result, mag, 0.0);

} else {

/* not so good, but...! */

mag = pow(magnitude(&a), (double) abs(b.v.int_val));

if (b.v.int_val < 0) {

if (mag != 0.0)

mag = 1.0 / mag;

else

undefined = TRUE;

}

ang = angle(&a) * b.v.int_val;

(void) Gcomplex(&result, mag * cos(ang),

mag * sin(ang));

}

break;

case CMPLX:

if (a.v.cmplx_val.real == 0 && a.v.cmplx_val.imag == 0) {

if (b.v.cmplx_val.imag != 0 || b.v.cmplx_val.real < 0) {

undefined = TRUE;

}

/* return 1.0 for 0**0 */

Gcomplex(&result, b.v.cmplx_val.real == 0 ? 1.0 : 0.0, 0.0);

} else {

mag = pow(magnitude(&a), fabs(b.v.cmplx_val.real));

if (b.v.cmplx_val.real < 0.0) {

if (mag != 0.0)

mag = 1.0 / mag;

else

undefined = TRUE;

}

mag *= gp_exp(-b.v.cmplx_val.imag * angle(&a));

ang = b.v.cmplx_val.real * angle(&a) +

b.v.cmplx_val.imag * log(magnitude(&a));

(void) Gcomplex(&result, mag * cos(ang),

mag * sin(ang));

}

break;

BAD_DEFAULT

}

break;

BAD_DEFAULT

}

push(&result);

}

void

f_factorial(union argument *arg)

{

struct value a;

int i;

double val = 0.0;

(void) arg; /* avoid -Wunused warning */

(void) pop(&a); /* find a! (factorial) */

switch (a.type) {

case INTGR:

val = 1.0;

for (i = a.v.int_val; i > 1; i--) /*fpe's should catch overflows */

val *= i;

break;

default:

int_error(NO_CARET, "factorial (!) argument must be an integer");

return; /* avoid gcc -Wall warning about val */

}

push(Gcomplex(&a, val, 0.0));

}

* Terminate the autoconversion from string to numeric values

#undef pop

void

f_concatenate(union argument *arg)

{

struct value a, b, result;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

if (b.type == INTGR) {

int i = b.v.int_val;

b.type = STRING;

b.v.string_val = (char *)gp_alloc(32,"str_const");

#ifdef HAVE_SNPRINTF

snprintf(b.v.string_val,32,"%d",i);

#else

sprintf(b.v.string_val,"%d",i);

#endif

}

if (a.type != STRING || b.type != STRING)

int_error(NO_CARET, "internal error : STRING operator applied to non-STRING type");

(void) Gstring(&result, gp_stradd(a.v.string_val, b.v.string_val));

gpfree_string(&a);

gpfree_string(&b);

push(&result);

gpfree_string(&result); /* free string allocated within gp_stradd() */

}

void

f_eqs(union argument *arg)

{

struct value a, b, result;

(void) arg; /* avoid -Wunused warning */

(void) pop(&b);

(void) pop(&a);

if(a.type != STRING || b.type != STRING)

int_error(NO_CARET, "internal error : STRING operator applied to non-STRING type");

(void) Ginteger(&result, !strcmp(a.v.string_val, b.v.string_val));

gpfree_string(&a);

gpfree_string(&b);

push(&result);

}

void

f_nes(union argument *arg)

{

struct value a, b, result;

(void) arg; /* avoid -Wunused warning */

View remainder of file in raw view

gnuplot-old/src/internal.c at gnuplot-4-4-alpha · gnuplot/gnuplot-old · GitHub

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