summaryrefslogtreecommitdiffstats
path: root/mdk-stage1/slang/slcmplex.c
diff options
context:
space:
mode:
Diffstat (limited to 'mdk-stage1/slang/slcmplex.c')
-rw-r--r--mdk-stage1/slang/slcmplex.c1142
1 files changed, 0 insertions, 1142 deletions
diff --git a/mdk-stage1/slang/slcmplex.c b/mdk-stage1/slang/slcmplex.c
deleted file mode 100644
index b210dfc04..000000000
--- a/mdk-stage1/slang/slcmplex.c
+++ /dev/null
@@ -1,1142 +0,0 @@
-/* Complex Data Type definition for S-Lang */
-/* Copyright (c) 1997, 1999, 2001 John E. Davis
- * This file is part of the S-Lang library.
- *
- * You may distribute under the terms of either the GNU General Public
- * License or the Perl Artistic License.
- */
-
-#include "slinclud.h"
-
-#include "slang.h"
-#include "_slang.h"
-
-/* The rest of the file is enclosed in this #if */
-#if SLANG_HAS_COMPLEX
-
-#if SLANG_HAS_FLOAT
-# include <math.h>
-#endif
-
-#ifdef PI
-# undef PI
-#endif
-#define PI 3.14159265358979323846
-
-int SLang_pop_complex (double *r, double *i)
-{
- double *c;
-
- switch (SLang_peek_at_stack ())
- {
- case SLANG_COMPLEX_TYPE:
- if (-1 == SLclass_pop_ptr_obj (SLANG_COMPLEX_TYPE, (VOID_STAR *)&c))
- return -1;
- *r = c[0];
- *i = c[1];
- SLfree ((char *) c);
- break;
-
- default:
- *i = 0.0;
- if (-1 == SLang_pop_double (r, NULL, NULL))
- return -1;
- break;
-
- case -1:
- return -1;
- }
- return 0;
-}
-
-int SLang_push_complex (double r, double i)
-{
- double *c;
-
- c = (double *) SLmalloc (2 * sizeof (double));
- if (c == NULL)
- return -1;
-
- c[0] = r;
- c[1] = i;
-
- if (-1 == SLclass_push_ptr_obj (SLANG_COMPLEX_TYPE, (VOID_STAR) c))
- {
- SLfree ((char *) c);
- return -1;
- }
- return 0;
-}
-
-double *SLcomplex_times (double *c, double *a, double *b)
-{
- double a_real, b_real, a_imag, b_imag;
-
- a_real = a[0];
- b_real = b[0];
- a_imag = a[1];
- b_imag = b[1];
-
- c[0] = a_real * b_real - a_imag * b_imag;
- c[1] = a_imag * b_real + a_real * b_imag;
-
- return c;
-}
-
-double *SLcomplex_divide (double *c, double *a, double *b)
-{
- double a_real, b_real, a_imag, b_imag;
- double ratio, invden;
-
- a_real = a[0];
- b_real = b[0];
- a_imag = a[1];
- b_imag = b[1];
-
- /* Do it this way to avoid overflow in the denom */
- if (fabs(b_real) > fabs(b_imag))
- {
- ratio = b_imag / b_real;
- invden = 1.0 / (b_real + b_imag * ratio);
- c[0] = (a_real + ratio * a_imag) * invden;
- c[1] = (a_imag - a_real * ratio) * invden;
- }
- else
- {
- ratio = b_real / b_imag;
- invden = 1.0 / (b_real * ratio + b_imag);
- c[0] = (a_real * ratio + a_imag) * invden;
- c[1] = (a_imag * ratio - a_real) * invden;
- }
- return c;
-}
-
-/* a^b = exp (b log a); */
-double *SLcomplex_pow (double *c, double *a, double *b)
-{
- return SLcomplex_exp (c, SLcomplex_times (c, b, SLcomplex_log (c, a)));
-}
-
-static double *complex_dpow (double *c, double *a, double b)
-{
- SLcomplex_log (c, a);
- c[0] *= b;
- c[1] *= b;
- return SLcomplex_exp (c, c);
-}
-
-static double *dcomplex_pow (double *c, double a, double *b)
-{
- a = log (a);
- c[0] = a * b[0];
- c[1] = a * b[1];
- return SLcomplex_exp (c, c);
-}
-
-double SLcomplex_abs (double *z)
-{
- return SLmath_hypot (z[0], z[1]);
-}
-
-/* It appears that FORTRAN assumes that the branch cut for the log function
- * is along the -x axis. So, use this for atan2:
- */
-static double my_atan2 (double y, double x)
-{
- double val;
-
- val = atan (y/x);
-
- if (x >= 0)
- return val; /* I, IV */
-
- if (y <= 0) /* III */
- return val - PI;
-
- return PI + val; /* II */
-}
-
-static void polar_form (double *r, double *theta, double *z)
-{
- double x, y;
-
- *r = SLcomplex_abs (z);
-
- x = z[0];
- y = z[1];
-
- if (x == 0.0)
- {
- if (y >= 0)
- *theta = 0.5 * PI;
- else
- *theta = 1.5 * PI;
- }
- else *theta = my_atan2 (y, x);
-}
-
-double *SLcomplex_sin (double *sinz, double *z)
-{
- double x, y;
-
- x = z[0]; y = z[1];
- sinz[0] = sin (x) * cosh (y);
- sinz[1] = cos (x) * sinh (y);
- return sinz;
-}
-
-double *SLcomplex_cos (double *cosz, double *z)
-{
- double x, y;
-
- x = z[0]; y = z[1];
- cosz[0] = cos (x) * cosh (y);
- cosz[1] = -sin (x) * sinh (y);
- return cosz;
-}
-
-double *SLcomplex_exp (double *expz, double *z)
-{
- double r, i;
-
- r = exp (z[0]);
- i = z[1];
- expz[0] = r * cos (i);
- expz[1] = r * sin (i);
- return expz;
-}
-
-double *SLcomplex_log (double *logz, double *z)
-{
- double r, theta;
-
- polar_form (&r, &theta, z); /* log R.e^(ix) = log R + ix */
- logz[0] = log(r);
- logz[1] = theta;
- return logz;
-}
-
-double *SLcomplex_log10 (double *log10z, double *z)
-{
- double l10 = log (10.0);
- (void) SLcomplex_log (log10z, z);
- log10z[0] = log10z[0] / l10;
- log10z[1] = log10z[1] / l10;
- return log10z;
-}
-
-double *SLcomplex_sqrt (double *sqrtz, double *z)
-{
- double r, x, y;
-
- x = z[0];
- y = z[1];
-
- r = SLmath_hypot (x, y);
-
- if (r == 0.0)
- {
- sqrtz [0] = sqrtz [1] = 0.0;
- return sqrtz;
- }
-
- if (x >= 0.0)
- {
- x = sqrt (0.5 * (r + x));
- y = 0.5 * y / x;
- }
- else
- {
- r = sqrt (0.5 * (r - x));
- x = 0.5 * y / r;
- y = r;
-
- if (x < 0.0)
- {
- x = -x;
- y = -y;
- }
- }
-
- sqrtz[0] = x;
- sqrtz[1] = y;
-
- return sqrtz;
-}
-
-double *SLcomplex_tan (double *tanz, double *z)
-{
- double x, y, invden;
-
- x = 2 * z[0];
- y = 2 * z[1];
- invden = 1.0 / (cos (x) + cosh (y));
- tanz[0] = invden * sin (x);
- tanz[1] = invden * sinh (y);
- return tanz;
-}
-
-/* Utility Function */
-static void compute_alpha_beta (double *z, double *alpha, double *beta)
-{
- double x, y, a, b;
-
- x = z[0];
- y = z[1];
- a = 0.5 * SLmath_hypot (x + 1, y);
- b = 0.5 * SLmath_hypot (x - 1, y);
-
- *alpha = a + b;
- *beta = a - b;
-}
-
-double *SLcomplex_asin (double *asinz, double *z)
-{
- double alpha, beta;
-
- compute_alpha_beta (z, &alpha, &beta);
- asinz[0] = asin (beta);
- asinz[1] = log (alpha + sqrt (alpha * alpha - 1));
- return asinz;
-}
-
-double *SLcomplex_acos (double *acosz, double *z)
-{
- double alpha, beta;
-
- compute_alpha_beta (z, &alpha, &beta);
- acosz[0] = acos (beta);
- acosz[1] = -log (alpha + sqrt (alpha * alpha - 1));
- return acosz;
-}
-
-double *SLcomplex_atan (double *atanz, double *z)
-{
- double x, y;
- double z1[2], z2[2];
-
- x = z[0]; y = z[1];
- z1[0] = x;
- z1[1] = 1 + y;
- z2[0] = -x;
- z2[1] = 1 - y;
-
- SLcomplex_log (z1, SLcomplex_divide (z2, z1, z2));
- atanz[0] = -0.5 * z1[1];
- atanz[1] = 0.5 * z1[0];
-
- return atanz;
-}
-
-double *SLcomplex_sinh (double *sinhz, double *z)
-{
- double x, y;
- x = z[0]; y = z[1];
- sinhz[0] = sinh (x) * cos (y);
- sinhz[1] = cosh (x) * sin (y);
- return sinhz;
-}
-
-double *SLcomplex_cosh (double *coshz, double *z)
-{
- double x, y;
- x = z[0]; y = z[1];
- coshz[0] = cosh (x) * cos (y);
- coshz[1] = sinh (x) * sin (y);
- return coshz;
-}
-
-double *SLcomplex_tanh (double *tanhz, double *z)
-{
- double x, y, invden;
- x = 2 * z[0];
- y = 2 * z[1];
- invden = 1.0 / (cosh (x) + cos (y));
- tanhz[0] = invden * sinh (x);
- tanhz[1] = invden * sin (y);
- return tanhz;
-}
-#if 0
-static double *not_implemented (char *fun, double *p)
-{
- SLang_verror (SL_NOT_IMPLEMENTED, "%s for complex numbers has not been implemented",
- fun);
- *p = -1.0;
- return p;
-}
-#endif
-/* Use: asinh(z) = -i asin(iz) */
-double *SLcomplex_asinh (double *asinhz, double *z)
-{
- double iz[2];
-
- iz[0] = -z[1];
- iz[1] = z[0];
-
- (void) SLcomplex_asin (iz, iz);
- asinhz[0] = iz[1];
- asinhz[1] = -iz[0];
-
- return asinhz;
-}
-
-/* Use: acosh (z) = i acos(z) */
-double *SLcomplex_acosh (double *acoshz, double *z)
-{
- double iz[2];
-
- (void) SLcomplex_acos (iz, z);
- acoshz[0] = -iz[1];
- acoshz[1] = iz[0];
-
- return acoshz;
-}
-
-/* Use: atanh(z) = -i atan(iz) */
-double *SLcomplex_atanh (double *atanhz, double *z)
-{
- double iz[2];
-
- iz[0] = -z[1];
- iz[1] = z[0];
-
- (void) SLcomplex_atan (iz, iz);
- atanhz[0] = iz[1];
- atanhz[1] = -iz[0];
-
- return atanhz;
-}
-
-static int complex_binary_result (int op, unsigned char a, unsigned char b,
- unsigned char *c)
-{
- (void) a; (void) b;
-
- switch (op)
- {
- default:
- case SLANG_POW:
- case SLANG_PLUS:
- case SLANG_MINUS:
- case SLANG_TIMES:
- case SLANG_DIVIDE:
- *c = SLANG_COMPLEX_TYPE;
- break;
-
- case SLANG_EQ:
- case SLANG_NE:
- *c = SLANG_CHAR_TYPE;
- break;
- }
- return 1;
-}
-
-static int complex_complex_binary (int op,
- unsigned char a_type, VOID_STAR ap, unsigned int na,
- unsigned char b_type, VOID_STAR bp, unsigned int nb,
- VOID_STAR cp)
-{
- char *ic;
- double *a, *b, *c;
- unsigned int n, n_max;
- unsigned int da, db;
-
- (void) a_type;
- (void) b_type;
-
- a = (double *) ap;
- b = (double *) bp;
- c = (double *) cp;
- ic = (char *) cp;
-
- if (na == 1) da = 0; else da = 2;
- if (nb == 1) db = 0; else db = 2;
-
- if (na > nb) n_max = na; else n_max = nb;
- n_max = 2 * n_max;
-
- switch (op)
- {
- default:
- return 0;
-
- case SLANG_PLUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] + b[0];
- c[n + 1] = a[1] + b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_MINUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] - b[0];
- c[n + 1] = a[1] - b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_TIMES:
- for (n = 0; n < n_max; n += 2)
- {
- SLcomplex_times (c + n, a, b);
- a += da; b += db;
- }
- break;
-
- case SLANG_DIVIDE: /* / */
- for (n = 0; n < n_max; n += 2)
- {
- if ((b[0] == 0.0) && (b[1] == 0.0))
- {
- SLang_Error = SL_DIVIDE_ERROR;
- return -1;
- }
- SLcomplex_divide (c + n, a, b);
- a += da; b += db;
- }
- break;
-
- case SLANG_EQ: /* == */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] == b[0]) && (a[1] == b[1]));
- a += da; b += db;
- }
- break;
-
- case SLANG_NE: /* != */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] != b[0]) || (a[1] != b[1]));
- a += da; b += db;
- }
- break;
-
- case SLANG_POW:
- for (n = 0; n < n_max; n += 2)
- {
- SLcomplex_pow (c + n, a, b);
- a += da; b += db;
- }
- break;
-
- }
-
- return 1;
-}
-
-static int complex_double_binary (int op,
- unsigned char a_type, VOID_STAR ap, unsigned int na,
- unsigned char b_type, VOID_STAR bp, unsigned int nb,
- VOID_STAR cp)
-{
- char *ic;
- double *a, *b, *c;
- unsigned int n, n_max;
- unsigned int da, db;
-
- (void) a_type;
- (void) b_type;
-
- a = (double *) ap;
- b = (double *) bp;
- c = (double *) cp;
- ic = (char *) cp;
-
- if (na == 1) da = 0; else da = 2;
- if (nb == 1) db = 0; else db = 1;
-
- if (na > nb) n_max = na; else n_max = nb;
- n_max = 2 * n_max;
-
- switch (op)
- {
- default:
- return 0;
-
- case SLANG_PLUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] + b[0];
- c[n + 1] = a[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_MINUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] - b[0];
- c[n + 1] = a[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_TIMES:
- for (n = 0; n < n_max; n += 2)
- {
- double b0 = b[0];
- c[n] = a[0] * b0;
- c[n + 1] = a[1] * b0;
- a += da; b += db;
- }
- break;
-
- case SLANG_DIVIDE: /* / */
- for (n = 0; n < n_max; n += 2)
- {
- double b0 = b[0];
- if (b0 == 0.0)
- {
- SLang_Error = SL_DIVIDE_ERROR;
- return -1;
- }
- c[n] = a[0] / b0;
- c[n + 1] = a[1] / b0;
- a += da; b += db;
- }
- break;
-
- case SLANG_EQ: /* == */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] == b[0]) && (a[1] == 0.0));
- a += da; b += db;
- }
- break;
-
- case SLANG_NE: /* != */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] != b[0]) || (a[1] != 0.0));
- a += da; b += db;
- }
- break;
-
- case SLANG_POW:
- for (n = 0; n < n_max; n += 2)
- {
- complex_dpow (c + n, a, b[0]);
- a += da; b += db;
- }
- break;
- }
-
- return 1;
-}
-
-static int double_complex_binary (int op,
- unsigned char a_type, VOID_STAR ap, unsigned int na,
- unsigned char b_type, VOID_STAR bp, unsigned int nb,
- VOID_STAR cp)
-{
- char *ic;
- double *a, *b, *c;
- unsigned int n, n_max;
- unsigned int da, db;
-
- (void) a_type;
- (void) b_type;
-
- a = (double *) ap;
- b = (double *) bp;
- c = (double *) cp;
- ic = (char *) cp;
-
- if (na == 1) da = 0; else da = 1;
- if (nb == 1) db = 0; else db = 2;
-
- if (na > nb) n_max = na; else n_max = nb;
- n_max = 2 * n_max;
-
- switch (op)
- {
- default:
- return 0;
-
- case SLANG_PLUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] + b[0];
- c[n + 1] = b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_MINUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] - b[0];
- c[n + 1] = -b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_TIMES:
- for (n = 0; n < n_max; n += 2)
- {
- double a0 = a[0];
- c[n] = a0 * b[0];
- c[n + 1] = a0 * b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_DIVIDE: /* / */
- for (n = 0; n < n_max; n += 2)
- {
- double z[2];
- if ((b[0] == 0.0) && (b[1] == 0.0))
- {
- SLang_Error = SL_DIVIDE_ERROR;
- return -1;
- }
- z[0] = a[0];
- z[1] = 0.0;
- SLcomplex_divide (c + n, z, b);
- a += da; b += db;
- }
- break;
-
- case SLANG_EQ: /* == */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] == b[0]) && (0.0 == b[1]));
- a += da; b += db;
- }
- break;
-
- case SLANG_NE: /* != */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] != b[0]) || (0.0 != b[1]));
- a += da; b += db;
- }
- break;
-
- case SLANG_POW:
- for (n = 0; n < n_max; n += 2)
- {
- dcomplex_pow (c + n, a[0], b);
- a += da; b += db;
- }
- break;
- }
-
- return 1;
-}
-
-static int complex_generic_binary (int op,
- unsigned char a_type, VOID_STAR ap, unsigned int na,
- unsigned char b_type, VOID_STAR bp, unsigned int nb,
- VOID_STAR cp)
-{
- char *ic;
- char *b;
- double *a, *c;
- unsigned int n, n_max;
- unsigned int da, db;
- unsigned int sizeof_b;
- SLang_To_Double_Fun_Type to_double;
-
- if (NULL == (to_double = SLarith_get_to_double_fun (b_type, &sizeof_b)))
- return 0;
-
- (void) a_type;
-
- a = (double *) ap;
- b = (char *) bp;
- c = (double *) cp;
- ic = (char *) cp;
-
- if (na == 1) da = 0; else da = 2;
- if (nb == 1) db = 0; else db = sizeof_b;
-
- if (na > nb) n_max = na; else n_max = nb;
- n_max = 2 * n_max;
-
- switch (op)
- {
- default:
- return 0;
-
- case SLANG_POW:
- for (n = 0; n < n_max; n += 2)
- {
- complex_dpow (c + n, a, to_double((VOID_STAR)b));
- a += da; b += db;
- }
- break;
-
- case SLANG_PLUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] + to_double((VOID_STAR)b);
- c[n + 1] = a[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_MINUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = a[0] - to_double((VOID_STAR)b);
- c[n + 1] = a[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_TIMES:
- for (n = 0; n < n_max; n += 2)
- {
- double b0 = to_double((VOID_STAR)b);
- c[n] = a[0] * b0;
- c[n + 1] = a[1] * b0;
- a += da; b += db;
- }
- break;
-
- case SLANG_DIVIDE: /* / */
- for (n = 0; n < n_max; n += 2)
- {
- double b0 = to_double((VOID_STAR)b);
- if (b0 == 0)
- {
- SLang_Error = SL_DIVIDE_ERROR;
- return -1;
- }
- c[n] = a[0] / b0;
- c[n + 1] = a[1] / b0;
- a += da; b += db;
- }
- break;
-
- case SLANG_EQ: /* == */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] == to_double((VOID_STAR)b)) && (a[1] == 0.0));
- a += da; b += db;
- }
- break;
-
- case SLANG_NE: /* != */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((a[0] != to_double((VOID_STAR)b)) || (a[1] != 0.0));
- a += da; b += db;
- }
- break;
- }
-
- return 1;
-}
-
-static int generic_complex_binary (int op,
- unsigned char a_type, VOID_STAR ap, unsigned int na,
- unsigned char b_type, VOID_STAR bp, unsigned int nb,
- VOID_STAR cp)
-{
- double *b, *c;
- char *a, *ic;
- unsigned int n, n_max;
- unsigned int da, db;
- unsigned int sizeof_a;
- SLang_To_Double_Fun_Type to_double;
-
- if (NULL == (to_double = SLarith_get_to_double_fun (a_type, &sizeof_a)))
- return 0;
-
- (void) b_type;
-
- a = (char *) ap;
- b = (double *) bp;
- c = (double *) cp;
- ic = (char *) cp;
-
- if (na == 1) da = 0; else da = sizeof_a;
- if (nb == 1) db = 0; else db = 2;
-
- if (na > nb) n_max = na; else n_max = nb;
- n_max = 2 * n_max;
-
- switch (op)
- {
- default:
- return 0;
- case SLANG_POW:
- for (n = 0; n < n_max; n += 2)
- {
- dcomplex_pow (c + n, to_double((VOID_STAR)a), b);
- a += da; b += db;
- }
- break;
-
- case SLANG_PLUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = to_double((VOID_STAR)a) + b[0];
- c[n + 1] = b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_MINUS:
- for (n = 0; n < n_max; n += 2)
- {
- c[n] = to_double((VOID_STAR)a) - b[0];
- c[n + 1] = -b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_TIMES:
- for (n = 0; n < n_max; n += 2)
- {
- double a0 = to_double((VOID_STAR)a);
- c[n] = a0 * b[0];
- c[n + 1] = a0 * b[1];
- a += da; b += db;
- }
- break;
-
- case SLANG_DIVIDE: /* / */
- for (n = 0; n < n_max; n += 2)
- {
- double z[2];
- if ((b[0] == 0.0) && (b[1] == 0.0))
- {
- SLang_Error = SL_DIVIDE_ERROR;
- return -1;
- }
- z[0] = to_double((VOID_STAR)a);
- z[1] = 0.0;
- SLcomplex_divide (c + n, z, b);
- a += da; b += db;
- }
- break;
-
- case SLANG_EQ: /* == */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((to_double((VOID_STAR)a) == b[0]) && (0.0 == b[1]));
- a += da; b += db;
- }
- break;
-
- case SLANG_NE: /* != */
- for (n = 0; n < n_max; n += 2)
- {
- ic[n/2] = ((to_double((VOID_STAR)a) != b[0]) || (0.0 != b[1]));
- a += da; b += db;
- }
- break;
- }
-
- return 1;
-}
-
-static int complex_unary_result (int op, unsigned char a, unsigned char *b)
-{
- (void) a;
-
- switch (op)
- {
- default:
- return 0;
-
- case SLANG_PLUSPLUS:
- case SLANG_MINUSMINUS:
- case SLANG_CHS:
- case SLANG_MUL2:
- *b = SLANG_COMPLEX_TYPE;
- break;
-
- case SLANG_SQR: /* |Real|^2 + |Imag|^2 ==> double */
- case SLANG_ABS: /* |z| ==> double */
- *b = SLANG_DOUBLE_TYPE;
- break;
-
- case SLANG_SIGN:
- *b = SLANG_INT_TYPE;
- break;
- }
- return 1;
-}
-
-static int complex_unary (int op,
- unsigned char a_type, VOID_STAR ap, unsigned int na,
- VOID_STAR bp)
-{
- unsigned int n;
- double *a, *b;
- int *ic;
-
- (void) a_type;
-
- a = (double *) ap;
- b = (double *) bp;
- ic = (int *) bp;
-
- na = 2 * na;
-
- switch (op)
- {
- default:
- return 0;
-
- case SLANG_PLUSPLUS:
- for (n = 0; n < na; n += 2) b[n] = (a[n] + 1);
- break;
- case SLANG_MINUSMINUS:
- for (n = 0; n < na; n += 2) b[n] = (a[n] - 1);
- break;
- case SLANG_CHS:
- for (n = 0; n < na; n += 2)
- {
- b[n] = -(a[n]);
- b[n + 1] = -(a[n + 1]);
- }
- break;
- case SLANG_SQR: /* |Real|^2 + |Imag|^2 ==> double */
- for (n = 0; n < na; n += 2)
- b[n/2] = (a[n] * a[n] + a[n + 1] * a[n + 1]);
- break;
-
- case SLANG_MUL2:
- for (n = 0; n < na; n += 2)
- {
- b[n] = (2 * a[n]);
- b[n + 1] = (2 * a[n + 1]);
- }
- break;
-
- case SLANG_ABS: /* |z| ==> double */
- for (n = 0; n < na; n += 2)
- b[n/2] = SLcomplex_abs (a + n);
- break;
-
- case SLANG_SIGN:
- /* Another creative extension. Lets return an integer which indicates
- * whether the complex number is in the upperhalf plane or not.
- */
- for (n = 0; n < na; n += 2)
- {
- if (a[n + 1] < 0.0) ic[n/2] = -1;
- else if (a[n + 1] > 0.0) ic[n/2] = 1;
- else ic[n/2] = 0;
- }
- break;
- }
-
- return 1;
-}
-
-static int
-complex_typecast (unsigned char from_type, VOID_STAR from, unsigned int num,
- unsigned char to_type, VOID_STAR to)
-{
- double *z;
- double *d;
- char *i;
- unsigned int n;
- unsigned int sizeof_i;
- SLang_To_Double_Fun_Type to_double;
-
- (void) to_type;
-
- z = (double *) to;
-
- switch (from_type)
- {
- default:
- if (NULL == (to_double = SLarith_get_to_double_fun (from_type, &sizeof_i)))
- return 0;
- i = (char *) from;
- for (n = 0; n < num; n++)
- {
- *z++ = to_double ((VOID_STAR) i);
- *z++ = 0.0;
-
- i += sizeof_i;
- }
- break;
-
- case SLANG_DOUBLE_TYPE:
- d = (double *) from;
- for (n = 0; n < num; n++)
- {
- *z++ = d[n];
- *z++ = 0.0;
- }
- break;
- }
-
- return 1;
-}
-
-static void complex_destroy (unsigned char type, VOID_STAR ptr)
-{
- (void) type;
- SLfree ((char *)*(double **) ptr);
-}
-
-static int complex_push (unsigned char type, VOID_STAR ptr)
-{
- double *z;
-
- (void) type;
- z = *(double **) ptr;
- return SLang_push_complex (z[0], z[1]);
-}
-
-static int complex_pop (unsigned char type, VOID_STAR ptr)
-{
- double *z;
-
- (void) type;
- z = *(double **) ptr;
- return SLang_pop_complex (&z[0], &z[1]);
-}
-
-int _SLinit_slcomplex (void)
-{
- SLang_Class_Type *cl;
- unsigned char *types;
-
- if (NULL == (cl = SLclass_allocate_class ("Complex_Type")))
- return -1;
-
- (void) SLclass_set_destroy_function (cl, complex_destroy);
- (void) SLclass_set_push_function (cl, complex_push);
- (void) SLclass_set_pop_function (cl, complex_pop);
-
- if (-1 == SLclass_register_class (cl, SLANG_COMPLEX_TYPE, 2 * sizeof (double),
- SLANG_CLASS_TYPE_VECTOR))
- return -1;
-
- types = _SLarith_Arith_Types;
- while (*types != SLANG_DOUBLE_TYPE)
- {
- unsigned char t = *types++;
-
- if ((-1 == SLclass_add_binary_op (t, SLANG_COMPLEX_TYPE, generic_complex_binary, complex_binary_result))
- || (-1 == SLclass_add_binary_op (SLANG_COMPLEX_TYPE, t, complex_generic_binary, complex_binary_result))
- || (-1 == (SLclass_add_typecast (t, SLANG_COMPLEX_TYPE, complex_typecast, 1))))
- return -1;
- }
-
- if ((-1 == (SLclass_add_binary_op (SLANG_COMPLEX_TYPE, SLANG_COMPLEX_TYPE, complex_complex_binary, complex_binary_result)))
- || (-1 == (SLclass_add_binary_op (SLANG_COMPLEX_TYPE, SLANG_DOUBLE_TYPE, complex_double_binary, complex_binary_result)))
- || (-1 == (SLclass_add_binary_op (SLANG_DOUBLE_TYPE, SLANG_COMPLEX_TYPE, double_complex_binary, complex_binary_result)))
- || (-1 == (SLclass_add_unary_op (SLANG_COMPLEX_TYPE, complex_unary, complex_unary_result)))
- || (-1 == (SLclass_add_typecast (SLANG_DOUBLE_TYPE, SLANG_COMPLEX_TYPE, complex_typecast, 1))))
- return -1;
-
- return 0;
-}
-
-#endif /* if SLANG_HAS_COMPLEX */
-
generated by cgit v1.2.1 (git 2.21.0) at 2024-04-30 22:15:46 +0000