static VALUE rb_gsl_integration_qags(int argc, VALUE *argv, VALUE obj)
{
double a, b, epsabs = EPSABS_DEFAULT, epsrel = EPSREL_DEFAULT;
double result, abserr;
size_t limit = LIMIT_DEFAULT;
gsl_function *F = NULL;
gsl_integration_workspace *w = NULL;
int status, intervals, flag = 0, itmp;
switch (TYPE(obj)) {
case T_MODULE: case T_CLASS: case T_OBJECT:
CHECK_FUNCTION(argv[0]);
Data_Get_Struct(argv[0], gsl_function, F);
itmp = get_a_b(argc, argv, 1, &a, &b);
break;
default:
Data_Get_Struct(obj, gsl_function, F);
itmp = get_a_b(argc, argv, 0, &a, &b);
break;
}
flag = get_epsabs_epsrel_limit_workspace(argc, argv, itmp, &epsabs, &epsrel,
&limit, &w);
status = gsl_integration_qags(F, a, b, epsabs, epsrel, limit, w,
&result, &abserr);
intervals = w->size;
if (flag == 1) gsl_integration_workspace_free(w);
return rb_ary_new3(4, rb_float_new(result), rb_float_new(abserr),
INT2FIX(intervals), INT2FIX(status));
}
static VALUE rb_gsl_integration_qawc(int argc, VALUE *argv, VALUE obj)
{
double a, b, c, epsabs, epsrel;
double result, abserr;
size_t limit;
gsl_function *F = NULL;
gsl_integration_workspace *w = NULL;
int status, intervals, itmp, flag = 0;
switch (TYPE(obj)) {
case T_MODULE: case T_CLASS: case T_OBJECT:
CHECK_FUNCTION(argv[0]);
Data_Get_Struct(argv[0], gsl_function, F);
itmp = 1;
break;
default:
Data_Get_Struct(obj, gsl_function, F);
itmp = 0;
break;
}
itmp = get_a_b(argc, argv, itmp, &a, &b);
if (argc-itmp <= 0) rb_raise(rb_eArgError, "The pole is not given");
Need_Float(argv[itmp]);
c = NUM2DBL(argv[itmp]);
flag = get_epsabs_epsrel_limit_workspace(argc, argv, itmp+1, &epsabs, &epsrel,
&limit, &w);
status = gsl_integration_qawc(F, a, b, c, epsabs, epsrel, limit, w, &result, &abserr);
intervals = w->size;
if (flag == 1) gsl_integration_workspace_free(w);
return rb_ary_new3(4, rb_float_new(result), rb_float_new(abserr), INT2FIX(intervals),
INT2FIX(status));
}
static int get_a_b_epsabs_epsrel(int argc, VALUE *argv, int argstart,
double *a, double *b, double *epsabs,
double *epsrel)
{
int itmp;
*epsabs = EPSABS_DEFAULT;
*epsrel = EPSREL_DEFAULT;
itmp = get_a_b(argc, argv, argstart, a, b);
itmp = get_epsabs_epsrel(argc, argv, itmp, epsabs, epsrel);
return itmp;
}
static VALUE rb_gsl_integration_qaws(int argc, VALUE *argv, VALUE obj)
{
double a, b, epsabs, epsrel;
double result, abserr;
size_t limit;
gsl_function *F = NULL;
gsl_integration_workspace *w = NULL;
gsl_integration_qaws_table *t = NULL;
int status, intervals, itmp, flag = 0, flagt = 0;
switch (TYPE(obj)) {
case T_MODULE: case T_CLASS: case T_OBJECT:
if (argc < 2) rb_raise(rb_eArgError, "too few arguments");
CHECK_FUNCTION(argv[0]);
Data_Get_Struct(argv[0], gsl_function, F);
itmp = 1;
break;
default:
if (argc < 1) rb_raise(rb_eArgError, "too few arguments");
Data_Get_Struct(obj, gsl_function, F);
itmp = 0;
break;
}
itmp = get_a_b(argc, argv, itmp, &a, &b);
if (TYPE(argv[itmp]) == T_ARRAY) {
flagt = 1;
t = make_qaws_table(argv[itmp]);
} else {
flagt = 0;
if (!rb_obj_is_kind_of(argv[itmp], cgsl_integration_qaws_table))
rb_raise(rb_eTypeError, "Integration::QAWS_Table expected");
Data_Get_Struct(argv[itmp], gsl_integration_qaws_table, t);
}
flag = get_epsabs_epsrel_limit_workspace(argc, argv, itmp+1, &epsabs, &epsrel,
&limit, &w);
status = gsl_integration_qaws(F, a, b, t, epsabs, epsrel, limit, w, &result, &abserr);
intervals = w->size;
if (flag == 1) gsl_integration_workspace_free(w);
if (flagt == 1) gsl_integration_qaws_table_free(t);
return rb_ary_new3(4, rb_float_new(result), rb_float_new(abserr), INT2FIX(intervals),
INT2FIX(status));
}
static VALUE rb_gsl_integration_qag(int argc, VALUE *argv, VALUE obj)
{
double a, b, epsabs = EPSABS_DEFAULT, epsrel = EPSREL_DEFAULT;
double result, abserr;
size_t limit = LIMIT_DEFAULT;
gsl_function *F = NULL;
gsl_integration_workspace *w = NULL;
int key = KEY_DEFAULT, status, intervals, itmp, flag = 0;
if (argc < 1) rb_raise(rb_eArgError,
"wrong number of arguments (%d for >= 1)", argc);
switch (TYPE(obj)) {
case T_MODULE: case T_CLASS: case T_OBJECT:
CHECK_FUNCTION(argv[0]);
Data_Get_Struct(argv[0], gsl_function, F);
if (argc == 3) {
CHECK_FIXNUM(argv[2]);
get_a_b(argc, argv, 1, &a, &b);
key = FIX2INT(argv[2]);
w = gsl_integration_workspace_alloc(limit);
flag = 1;
} else if (argc == 4) {
CHECK_FIXNUM(argv[3]);
get_a_b(argc, argv, 1, &a, &b);
key = FIX2INT(argv[3]);
w = gsl_integration_workspace_alloc(limit);
flag = 1;
} else {
itmp = get_a_b_epsabs_epsrel(argc, argv, 1, &a, &b, &epsabs, &epsrel);
flag = get_limit_key_workspace(argc, argv, itmp, &limit, &key, &w);
}
break;
default:
if (argc == 2) {
if (FIXNUM_P(argv[1])) {
key = FIX2INT(argv[1]);
w = gsl_integration_workspace_alloc(limit);
flag = 1;
} else if (rb_obj_is_kind_of(argv[1], cgsl_integration_workspace)) {
Data_Get_Struct(argv[1], gsl_integration_workspace, w);
flag = 0;
} else {
rb_raise(rb_eTypeError, "Key or Workspace expected");
}
itmp = get_a_b(argc, argv, 0, &a, &b);
} else if (argc == 3) {
if (FIXNUM_P(argv[2])) {
key = FIX2INT(argv[2]);
w = gsl_integration_workspace_alloc(limit);
flag = 1;
} else if (rb_obj_is_kind_of(argv[2], cgsl_integration_workspace)) {
Data_Get_Struct(argv[2], gsl_integration_workspace, w);
flag = 0;
} else {
rb_raise(rb_eTypeError, "Key or Workspace expected");
}
itmp = get_a_b(argc, argv, 0, &a, &b);
} else {
itmp = get_a_b_epsabs_epsrel(argc, argv, 0, &a, &b, &epsabs, &epsrel);
flag = get_limit_key_workspace(argc, argv, itmp, &limit, &key, &w);
}
Data_Get_Struct(obj, gsl_function, F);
break;
}
status = gsl_integration_qag(F, a, b, epsabs, epsrel, limit, key, w,
&result, &abserr);
intervals = w->size;
if (flag == 1) gsl_integration_workspace_free(w);
return rb_ary_new3(4, rb_float_new(result), rb_float_new(abserr),
INT2FIX(intervals), INT2FIX(status));
}
