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vct.c
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vct.c
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/* vct support
*
* a vct is an object containing a mus_float_t array and its size
*
* C side:
* void mus_vct_init(void) called to declare the various functions and the vct type
* bool mus_is_vct(Xen obj) is obj a vct
* Xen xen_make_vct(int len, mus_float_t *data) make a new vct
* Xen xen_make_vct_wrapper(int len, mus_float_t *data) make a new vct that doesn't free data when garbage collector strikes
* vct *xen_to_vct(Xen arg) given Xen arg, return vct
* void mus_vct_set_print_length(int val) set vct print length (default 10) (also mus_vct_print_length)
*
* (make-vct len (filler 0.0)) make new vct
* (vct? obj) is obj a vct
* (vct-ref v index) return v[index]
* (vct-set! v index val) v[index] = val
* (vct-copy v) return a copy of v
* (vct-length v) return length of v
* (vct-add! v1 v2 (offset 0)) v1[i+offset] = v1[i+offset] + v2[i] -> v1
* (vct-subtract! v1 v2) v1[i] = v1[i] - v2[i] -> v1
* (vct-offset! v1 scl) v1[i] += scl -> v1
* (vct-multiply! v1 v2) v1[i] *= v2[i] -> v1
* (vct-scale! v1 scl) v1[i] *= scl -> v1
* (vct-abs! v) v[i] = abs(v[i])
* (vct-fill! v1 val) v1[i] = val -> v1
* (vct-map! v1 proc) set each element of v1 to value of function proc()
* (vct-peak v1) max val (abs) in v
* (vct-equal? v1 v2 diff) is element-wise relative-difference of v1 and v2 ever greater than diff?
* (list->vct lst) return vct with elements of list lst
* (vct->list v1) return list with elements of vct v1
* (vector->vct vect) return vct with elements of vector vect
* (vct->vector v) return vector of vct contents
* (vct-move! v new old) v[new++] = v[old++] -> v
* (vct-subseq v start end vnew) vnew = v[start..end]
* (vct-reverse! v (len #f)) reverse contents (using len as end point if given)
* (vct->string v) scheme-readable description of vct
*
* (vct* obj1 obj2) combines vct-multiply and vct-scale
* (vct+ obj1 obj2) combines vct-add and vct-offset
*
* The intended use is a sort of latter-day array-processing system that handles huge
* one-dimensional vectors -- fft's, etc. Some of these functions can be found in
* the Snd package; others can be found in the CLM package (clm2xen.c).
*/
#include "mus-config.h"
#if USE_SND
#include "snd.h"
#endif
#include <stddef.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if _MSC_VER
#pragma warning(disable: 4244)
#endif
#include "_sndlib.h"
#include "xen.h"
#include "clm.h"
#include "sndlib2xen.h"
#include "clm2xen.h"
#include "vct.h"
#if (!HAVE_SCHEME)
struct vct {
mus_long_t length;
mus_float_t *data;
bool dont_free;
};
mus_long_t mus_vct_length(vct *v) {return(v->length);}
mus_float_t *mus_vct_data(vct *v) {return(v->data);}
#endif
#if HAVE_SCHEME
#define S_make_vct "make-float-vector"
#define S_vct_add "float-vector-add!"
#define S_vct_subtract "float-vector-subtract!"
#define S_vct_copy "float-vector-copy"
#define S_vct_length "float-vector-length"
#define S_vct_multiply "float-vector-multiply!"
#define S_vct_offset "float-vector-offset!"
#define S_vct_ref "float-vector-ref"
#define S_vct_scale "float-vector-scale!"
#define S_vct_abs "float-vector-abs!"
#define S_vct_fill "float-vector-fill!"
#define S_vct_set "float-vector-set!"
#define S_vct_peak "float-vector-peak"
#define S_vct_equal "float-vector-equal?"
#define S_is_vct "float-vector?"
#define S_list_to_vct "list->float-vector"
#define S_vct_to_list "float-vector->list"
#define S_vector_to_vct "vector->float-vector"
#define S_vct_to_vector "float-vector->vector"
#define S_vct_move "float-vector-move!"
#define S_vct_subseq "float-vector-subseq"
#define S_vct_reverse "float-vector-reverse!"
#define S_vct_to_string "float-vector->string"
#define S_vct_times "float-vector*"
#define S_vct_plus "float-vector+"
#define A_VCT "a float-vector"
#else
#define S_make_vct "make-vct"
#define S_vct_add "vct-add!"
#define S_vct_subtract "vct-subtract!"
#define S_vct_copy "vct-copy"
#define S_vct_length "vct-length"
#define S_vct_multiply "vct-multiply!"
#define S_vct_offset "vct-offset!"
#define S_vct_ref "vct-ref"
#define S_vct_scale "vct-scale!"
#define S_vct_abs "vct-abs!"
#define S_vct_fill "vct-fill!"
#define S_vct_set "vct-set!"
#define S_vct_peak "vct-peak"
#define S_vct_equal "vct-equal?"
#define S_is_vct "vct?"
#define S_list_to_vct "list->vct"
#define S_vct_to_list "vct->list"
#define S_vector_to_vct "vector->vct"
#define S_vct_to_vector "vct->vector"
#define S_vct_move "vct-move!"
#define S_vct_subseq "vct-subseq"
#define S_vct_reverse "vct-reverse!"
#define S_vct_to_string "vct->string"
#if HAVE_RUBY
#define S_vct_times "vct_multiply"
#define S_vct_plus "vct_add"
#else
#define S_vct_times "vct*"
#define S_vct_plus "vct+"
#endif
#define A_VCT "a vct"
#endif
#ifndef PROC_FALSE
#if HAVE_RUBY
#define PROC_FALSE "false"
#define PROC_TRUE "true"
#else
#define PROC_FALSE "#f"
#define PROC_TRUE "#t"
#endif
#endif
#if USE_SND
#define VCT_PRINT_LENGTH DEFAULT_PRINT_LENGTH
#else
#define VCT_PRINT_LENGTH 10
#endif
static int vct_print_length = VCT_PRINT_LENGTH;
void mus_vct_set_print_length(int len)
{
vct_print_length = len;
}
int mus_vct_print_length(void)
{
return(vct_print_length);
}
vct *xen_to_vct(Xen arg)
{
if (mus_is_vct(arg))
return((vct *)Xen_to_vct(arg));
return(NULL);
}
#define VCT_PRINT_BUFFER_SIZE 64
#if (!HAVE_SCHEME)
static Xen_object_type_t vct_tag;
bool mus_is_vct(Xen obj)
{
return(Xen_c_object_is_type(obj, vct_tag));
}
static void vct_free(vct *v)
{
if (v)
{
if ((!(v->dont_free)) &&
(v->data))
free(v->data);
v->data = NULL;
free(v);
}
}
Xen_wrap_free(vct, free_vct, vct_free)
static char *mus_vct_to_string(vct *v)
{
int len, size;
char *buf;
char flt[VCT_PRINT_BUFFER_SIZE];
mus_float_t *d;
if (v == NULL) return(NULL);
len = vct_print_length;
if (len > mus_vct_length(v)) len = mus_vct_length(v);
d = mus_vct_data(v);
size = (len + 1) * VCT_PRINT_BUFFER_SIZE;
buf = (char *)calloc(size, sizeof(char));
snprintf(buf, size, "#<vct[len=%lld" "]", mus_vct_length(v));
if ((len > 0) && (d != NULL))
{
int i;
strcat(buf, ":");
for (i = 0; i < len; i++)
{
snprintf(flt, VCT_PRINT_BUFFER_SIZE, " %.3f", d[i]);
strcat(buf, flt);
}
if (mus_vct_length(v) > vct_print_length)
strcat(buf, " ...");
}
strcat(buf, ">");
return(buf);
}
#endif
char *mus_vct_to_readable_string(vct *v)
{
int i, len, size;
char *buf;
char flt[VCT_PRINT_BUFFER_SIZE];
mus_float_t *d;
if (v == NULL) return(NULL);
len = (int)(mus_vct_length(v));
size = (len + 1) * VCT_PRINT_BUFFER_SIZE;
buf = (char *)calloc(size, sizeof(char));
d = mus_vct_data(v);
#if HAVE_SCHEME
snprintf(buf, size, "(float-vector");
#endif
#if HAVE_RUBY || HAVE_FORTH
snprintf(buf, size, "vct(");
#endif
for (i = 0; i < len; i++)
{
#if HAVE_SCHEME || HAVE_FORTH
snprintf(flt, VCT_PRINT_BUFFER_SIZE, " %.3f", d[i]);
#endif
#if HAVE_RUBY
snprintf(flt, VCT_PRINT_BUFFER_SIZE, "%.3f%s", d[i], i + 1 < len ? ", " : "");
#endif
strcat(buf, flt);
}
#if HAVE_FORTH
strcat(buf, " ");
#endif
strcat(buf, ")");
return(buf);
}
static Xen g_vct_to_readable_string(Xen obj)
{
char *vstr;
Xen result;
#define H_vct_to_string "(" S_vct_to_string " v): readable description of v"
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_to_string, A_VCT);
vstr = mus_vct_to_readable_string(Xen_to_vct(obj));
result = C_string_to_Xen_string(vstr);
free(vstr);
return(result);
}
bool mus_vct_is_equal(vct *v1, vct *v2)
{
if (v1 == v2) return(true);
return((mus_vct_length(v1) == mus_vct_length(v2)) &&
(mus_arrays_are_equal(mus_vct_data(v1), mus_vct_data(v2),
mus_float_equal_fudge_factor(),
mus_vct_length(v1))));
}
#if (!HAVE_SCHEME)
static Xen g_is_vct(Xen obj)
{
#define H_is_vct "(" S_is_vct " obj): is obj a " S_vct
return(C_bool_to_Xen_boolean(mus_is_vct(obj)));
}
Xen_wrap_print(vct, print_vct, mus_vct_to_string)
static Xen equalp_vct(Xen obj1, Xen obj2)
{
if ((!(mus_is_vct(obj1))) || (!(mus_is_vct(obj2)))) return(Xen_false);
return(C_bool_to_Xen_boolean(mus_vct_is_equal(Xen_to_vct(obj1), Xen_to_vct(obj2))));
}
vct *mus_vct_make(mus_long_t len)
{
vct *new_vct;
new_vct = (vct *)malloc(sizeof(vct));
new_vct->length = len;
if (len > 0)
new_vct->data = (mus_float_t *)calloc(len, sizeof(mus_float_t));
else new_vct->data = NULL;
new_vct->dont_free = false;
return(new_vct);
}
vct *mus_vct_wrap(mus_long_t len, mus_float_t *data)
{
vct *new_vct;
new_vct = (vct *)malloc(sizeof(vct));
new_vct->length = len;
new_vct->data = data;
new_vct->dont_free = true;
return(new_vct);
}
vct *mus_vct_free(vct *v)
{
vct_free(v);
return(NULL);
}
Xen xen_make_vct(mus_long_t len, mus_float_t *data)
{
vct *new_vct;
if (len < 0) return(Xen_false);
if ((len > 0) &&
(data == NULL))
Xen_error(Xen_make_error_type("out-of-memory"),
Xen_list_2(C_string_to_Xen_string(S_make_vct ": can't allocate size ~A"),
C_int_to_Xen_integer(len)));
new_vct = (vct *)malloc(sizeof(vct));
new_vct->length = len;
new_vct->data = data;
new_vct->dont_free = false;
return(Xen_make_object(vct_tag, new_vct, 0, free_vct));
}
Xen xen_make_vct_wrapper(mus_long_t len, mus_float_t *data)
{
vct *new_vct;
new_vct = (vct *)malloc(sizeof(vct));
new_vct->length = len;
new_vct->data = data;
new_vct->dont_free = true;
return(Xen_make_object(vct_tag, new_vct, 0, free_vct));
}
Xen vct_to_xen(vct *v)
{
return(Xen_make_object(vct_tag, v, 0, free_vct));
}
static Xen g_vct_fill(Xen obj, Xen val);
static Xen g_make_vct(Xen len, Xen filler)
{
#if HAVE_RUBY
#define vct_make_example "v = make_vct(32, 1.0)"
#endif
#if HAVE_FORTH
#define vct_make_example "32 1.0 make-vct value v"
#endif
#if HAVE_SCHEME
#define vct_make_example "(make-float-vector 32 1.0)"
#endif
#define H_make_vct "(" S_make_vct " len :optional (initial-element 0)): returns a new " S_vct " of length len filled with \
initial-element: \n " vct_make_example
mus_long_t size;
Xen_check_type(Xen_is_llong(len), len, 1, S_make_vct, "an integer");
Xen_check_type(Xen_is_number(filler) || !Xen_is_bound(filler), filler, 2, S_make_vct, "a number");
size = Xen_llong_to_C_llong(len);
if (size < 0)
Xen_out_of_range_error(S_make_vct, 1, len, "new vct size < 0?");
if ((size > mus_max_malloc()) ||
(((mus_long_t)(size * sizeof(mus_float_t))) > mus_max_malloc()))
Xen_out_of_range_error(S_make_vct, 1, len, "new vct size is too large (see mus-max-malloc)");
if (Xen_is_number(filler))
return(g_vct_fill(xen_make_vct(size, (mus_float_t *)calloc(size, sizeof(mus_float_t))), filler));
return(xen_make_vct(size, (mus_float_t *)calloc(size, sizeof(mus_float_t))));
}
static Xen g_vct_length(Xen obj)
{
#define H_vct_length "(" S_vct_length " v): length of " S_vct " v"
vct *v;
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_length, A_VCT);
v = Xen_to_vct(obj);
return(C_llong_to_Xen_llong(mus_vct_length(v)));
}
static Xen g_vct_copy(Xen obj)
{
#define H_vct_copy "(" S_vct_copy " v): returns a copy of " S_vct " v"
vct *v;
mus_float_t *copied_data = NULL;
mus_long_t len;
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_copy, A_VCT);
v = Xen_to_vct(obj);
len = mus_vct_length(v);
if (len > 0)
{
copied_data = (mus_float_t *)malloc(len * sizeof(mus_float_t));
memcpy((void *)copied_data, (void *)(mus_vct_data(v)), (len * sizeof(mus_float_t)));
}
return(xen_make_vct(len, copied_data));
}
#else /* HAVE_SCHEME */
vct *mus_vct_make(mus_long_t len)
{
s7_int di[1];
di[0] = len;
return(s7_make_float_vector(s7, len, 1, di));
}
Xen xen_make_vct(mus_long_t len, mus_float_t *data)
{
return(s7_make_float_vector_wrapper(s7, len, (s7_double *)data, 1, NULL, true)); /* freed by s7 */
}
Xen xen_make_vct_wrapper(mus_long_t len, mus_float_t *data)
{
s7_int di[1];
di[0] = len;
return(s7_make_float_vector_wrapper(s7, len, (s7_double *)data, 1, di, false)); /* not freed by s7 */
}
vct *mus_vct_wrap(mus_long_t len, mus_float_t *data)
{
return(xen_make_vct_wrapper(len, data));
}
static Xen g_vct_copy(Xen obj)
{
#define H_vct_copy "(" S_vct_copy " v): returns a copy of " S_vct " v"
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_copy, A_VCT);
return(s7_vector_copy(s7, obj));
}
#endif
static Xen g_vct_move(Xen obj, Xen newi, Xen oldi, Xen backwards)
{
#define H_vct_moveB "(" S_vct_move " obj new old :optional backwards): moves " S_vct " obj data from old to new: v[new++] = v[old++], or \
v[new--] = v[old--] if backwards is " PROC_FALSE "."
vct *v;
mus_long_t i, j, ni, nj;
mus_float_t *d;
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_move, A_VCT);
Xen_check_type(Xen_is_llong(newi), newi, 2, S_vct_move, "an integer");
Xen_check_type(Xen_is_llong(oldi), oldi, 3, S_vct_move, "an integer");
Xen_check_type(Xen_is_boolean_or_unbound(backwards), backwards, 4, S_vct_move, "a boolean");
v = Xen_to_vct(obj);
d = mus_vct_data(v);
ni = Xen_llong_to_C_llong(newi);
nj = Xen_llong_to_C_llong(oldi);
if ((Xen_is_boolean(backwards)) &&
(!Xen_is_false(backwards)))
{
if (ni >= mus_vct_length(v))
Xen_out_of_range_error(S_vct_move, 2, newi, "new-index too high");
if (nj >= mus_vct_length(v))
Xen_out_of_range_error(S_vct_move, 3, oldi, "old-index too high");
for (i = ni, j = nj; (j >= 0) && (i >= 0); i--, j--)
d[i] = d[j];
}
else
{
mus_long_t len;
if (ni < 0)
Xen_out_of_range_error(S_vct_move, 2, newi, "new-index < 0?");
if (nj < 0)
Xen_out_of_range_error(S_vct_move, 3, oldi, "old-index < 0?");
len = mus_vct_length(v);
for (i = ni, j = nj; (j < len) && (i < len); i++, j++)
d[i] = d[j];
}
return(obj);
}
#if (!HAVE_SCHEME)
static Xen g_vct_ref(Xen obj, Xen pos)
{
#define H_vct_ref "(" S_vct_ref " v n): element n of " S_vct " v, v[n]"
vct *v;
mus_long_t loc;
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_ref, A_VCT);
Xen_check_type(Xen_is_llong(pos), pos, 2, S_vct_ref, "an integer");
v = Xen_to_vct(obj);
loc = Xen_llong_to_C_llong(pos);
if (loc < 0)
Xen_out_of_range_error(S_vct_ref, 2, pos, "index < 0?");
if (loc >= mus_vct_length(v))
Xen_out_of_range_error(S_vct_ref, 2, pos, "index too high?");
return(C_double_to_Xen_real(mus_vct_data(v)[loc]));
}
static Xen g_vct_set(Xen obj, Xen pos, Xen val)
{
#define H_vct_setB "(" S_vct_set " v n val): sets element of " S_vct " v to val, v[n] = val"
vct *v;
mus_long_t loc;
double x;
mus_float_t *d;
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_set, A_VCT);
Xen_check_type(Xen_is_llong(pos), pos, 2, S_vct_set, "an integer");
Xen_check_type(Xen_is_number(val), val, 3, S_vct_set, "a real number");
x = Xen_real_to_C_double(val);
v = Xen_to_vct(obj);
loc = Xen_llong_to_C_llong(pos);
if (loc < 0)
Xen_out_of_range_error(S_vct_set, 2, pos, "index < 0?");
if (loc >= mus_vct_length(v))
Xen_out_of_range_error(S_vct_set, 2, pos, "index >= vct-length?");
d = mus_vct_data(v);
d[loc] = x;
return(val);
}
#endif
static Xen g_vct_multiply(Xen obj1, Xen obj2)
{
#define H_vct_multiplyB "(" S_vct_multiply " v1 v2): element-wise multiply of " S_vct "s v1 and v2: v1[i] *= v2[i], returns v1"
mus_long_t i, lim, lim1;
vct *v1, *v2;
mus_float_t *d1, *d2;
Xen_check_type(mus_is_vct(obj1), obj1, 1, S_vct_multiply, A_VCT);
Xen_check_type(mus_is_vct(obj2), obj2, 2, S_vct_multiply, A_VCT);
v1 = Xen_to_vct(obj1);
v2 = Xen_to_vct(obj2);
d1 = mus_vct_data(v1);
d2 = mus_vct_data(v2);
lim = mus_vct_length(v1);
lim1 = mus_vct_length(v2);
if (lim > lim1) lim = lim1;
for (i = 0; i < lim; i++) d1[i] *= d2[i];
return(obj1);
}
static void vct_add(mus_float_t *d1, mus_float_t *d2, mus_long_t lim)
{
mus_long_t i, lim8;
lim8 = lim - 16;
i = 0;
while (i <= lim8)
{
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
d1[i] += d2[i]; i++;
}
for (; i < lim; i++)
d1[i] += d2[i];
}
static Xen g_vct_add(Xen obj1, Xen obj2, Xen offs)
{
#define H_vct_addB "(" S_vct_add " v1 v2 :optional (offset 0)): element-wise add of " S_vct "s v1 and v2: v1[i + offset] += v2[i], returns v1"
mus_long_t lim, len1;
vct *v1, *v2;
mus_float_t *d1, *d2;
Xen_check_type(mus_is_vct(obj1), obj1, 1, S_vct_add, A_VCT);
Xen_check_type(mus_is_vct(obj2), obj2, 2, S_vct_add, A_VCT);
Xen_check_type(Xen_is_llong_or_unbound(offs), offs, 3, S_vct_add, "an integer");
v1 = Xen_to_vct(obj1);
v2 = Xen_to_vct(obj2);
d1 = mus_vct_data(v1);
d2 = mus_vct_data(v2);
len1 = mus_vct_length(v1);
lim = mus_vct_length(v2);
if (lim > len1) lim = len1;
if (lim == 0) return(obj1);
if (Xen_is_llong(offs))
{
mus_long_t j;
j = Xen_llong_to_C_llong(offs);
if (j < 0)
Xen_out_of_range_error(S_vct_add, 3, offs, "offset < 0?");
if (j > len1)
Xen_out_of_range_error(S_vct_add, 3, offs, "offset > length of vct?");
if ((j + lim) > len1)
lim = (len1 - j);
vct_add((mus_float_t *)(d1 + j), d2, lim);
}
else vct_add(d1, d2, lim);
return(obj1);
}
static Xen g_vct_subtract(Xen obj1, Xen obj2)
{
#define H_vct_subtractB "(" S_vct_subtract " v1 v2): element-wise subtract of " S_vct "s v1 and v2: v1[i] -= v2[i], returns v1"
mus_long_t i, lim, lim1, lim4;
vct *v1, *v2;
mus_float_t *d1, *d2;
Xen_check_type(mus_is_vct(obj1), obj1, 1, S_vct_subtract, A_VCT);
Xen_check_type(mus_is_vct(obj2), obj2, 2, S_vct_subtract, A_VCT);
v1 = Xen_to_vct(obj1);
v2 = Xen_to_vct(obj2);
d1 = mus_vct_data(v1);
d2 = mus_vct_data(v2);
lim = mus_vct_length(v1);
lim1 = mus_vct_length(v2);
if (lim > lim1) lim = lim1;
lim4 = lim - 4;
i = 0;
while (i <= lim4)
{
d1[i] -= d2[i]; i++;
d1[i] -= d2[i]; i++;
d1[i] -= d2[i]; i++;
d1[i] -= d2[i]; i++;
}
for (; i < lim; i++)
d1[i] -= d2[i];
return(obj1);
}
static Xen g_vct_abs(Xen obj)
{
#define H_vct_absB "(" S_vct_abs " v): v[i] = abs(v[i]), return v."
mus_long_t i, lim;
vct *v;
mus_float_t *d;
Xen_check_type(mus_is_vct(obj), obj, 0, S_vct_abs, A_VCT);
v = Xen_to_vct(obj);
d = mus_vct_data(v);
lim = mus_vct_length(v);
for (i = 0; i < lim; i++) d[i] = fabs(d[i]);
return(obj);
}
static Xen g_vct_equal(Xen uv1, Xen uv2, Xen udiff)
{
#define H_vct_equal "(" S_vct_equal " v1 v2 diff): is element-wise relative-difference of v1 and v2 ever greater than diff?"
mus_long_t i, lim;
vct *v1, *v2;
mus_float_t *d1, *d2;
mus_float_t diff, max_diff = 0.0;
Xen_check_type(mus_is_vct(uv1), uv1, 1, S_vct_equal, A_VCT);
Xen_check_type(mus_is_vct(uv2), uv2, 2, S_vct_equal, A_VCT);
Xen_check_type(Xen_is_number(udiff), udiff, 3, S_vct_equal, "a number");
v1 = Xen_to_vct(uv1);
d1 = mus_vct_data(v1);
v2 = Xen_to_vct(uv2);
d2 = mus_vct_data(v2);
diff = Xen_real_to_C_double(udiff);
lim = mus_vct_length(v1);
if (mus_vct_length(v2) < lim) lim = mus_vct_length(v2);
for (i = 0; i < lim; i++)
{
mus_float_t x1, x2, z;
x1 = fabs(d1[i]);
x2 = fabs(d2[i]);
z = fabs(d1[i] - d2[i]);
if (x1 > x2)
z /= x1;
else
{
if (x2 > 0.0)
z /= x2;
}
if (z > diff)
return(Xen_false);
if (z > max_diff)
max_diff = z;
}
return(C_double_to_Xen_real(max_diff));
}
static void vct_scale(mus_float_t *d, mus_float_t scl, mus_long_t len)
{
if (scl == 0.0)
memset((void *)d, 0, len * sizeof(mus_float_t));
else
{
if (scl != 1.0)
{
mus_long_t i, lim4;
lim4 = len - 4;
i = 0;
while (i <= lim4)
{
d[i++] *= scl;
d[i++] *= scl;
d[i++] *= scl;
d[i++] *= scl;
}
for (; i < len; i++)
d[i] *= scl;
}
}
}
static Xen g_vct_scale(Xen obj1, Xen obj2)
{
#define H_vct_scaleB "(" S_vct_scale " v val): scale each element of v by val: v[i] *= val, returns v"
/* Xen_check_type(s7_is_float_vector(obj1), obj1, 1, "float-vector-scale!", "a float-vector");
* return(s7_float_vector_scale(s7, obj1, obj2));
*/
vct *v1;
Xen_check_type(mus_is_vct(obj1), obj1, 1, S_vct_scale, A_VCT);
Xen_check_type(Xen_is_number(obj2), obj2, 2, S_vct_scale, "a number");
v1 = Xen_to_vct(obj1);
if (mus_vct_length(v1) == 0) return(obj1);
vct_scale(mus_vct_data(v1), Xen_real_to_C_double(obj2), mus_vct_length(v1));
return(obj1);
}
static Xen g_vct_offset(Xen obj1, Xen obj2)
{
#define H_vct_offsetB "(" S_vct_offset " v val): add val to each element of v: v[i] += val, returns v"
vct *v1;
mus_float_t scl;
mus_float_t *d;
Xen_check_type(mus_is_vct(obj1), obj1, 1, S_vct_offset, A_VCT);
Xen_check_type(Xen_is_number(obj2), obj2, 2, S_vct_offset, "a number");
v1 = Xen_to_vct(obj1);
if (mus_vct_length(v1) == 0) return(obj1);
d = mus_vct_data(v1);
scl = Xen_real_to_C_double(obj2);
if (scl != 0.0)
{
mus_long_t i;
for (i = 0; i < mus_vct_length(v1); i++)
d[i] += scl;
}
return(obj1);
}
#if HAVE_SCHEME
#define S_vct_spatter "float-vector-spatter"
static Xen g_vct_spatter(Xen fv, XEN iv, XEN end, XEN val)
{
#define H_vct_spatter "(" S_vct_spatter " fv iv end val) places val in fv at locations determined by iv"
s7_double *fv_vals;
s7_int *iv_vals;
s7_double x;
int i, len;
if (!s7_is_float_vector(fv)) s7_wrong_type_arg_error(s7, S_vct_spatter, 1, fv, "a float-vector");
if (!s7_is_int_vector(iv)) s7_wrong_type_arg_error(s7, S_vct_spatter, 2, iv, "an int-vector");
if (!s7_is_integer(end)) s7_wrong_type_arg_error(s7, S_vct_spatter, 3, end, "an integer");
if (!s7_is_real(val)) s7_wrong_type_arg_error(s7, S_vct_spatter, 4, val, "a real");
fv_vals = s7_float_vector_elements(fv);
iv_vals = s7_int_vector_elements(iv);
len = s7_integer(end);
x = s7_real(val);
for (i = 0; i < len; i++)
fv_vals[iv_vals[i]] = x;
return(val);
}
#define S_vct_interpolate "float-vector-interpolate"
static Xen g_vct_interpolate(Xen fv, Xen start_index, Xen end_index, Xen start_x, XEN incr, XEN val1, XEN val2)
{
#define H_vct_interpolate "(" S_vct_interpolate " fv index0 index1 x0 dx x1 x2) sets the values of fv between\
index0 and index1 interpolating between x2 and x1 by incrementing x0 by dx"
s7_double x0, dx, x1, x2;
int i, beg, lim;
s7_double *fv_vals;
fv_vals = s7_float_vector_elements(fv);
if (!s7_is_float_vector(fv)) s7_wrong_type_arg_error(s7, S_vct_interpolate, 1, fv, "a float-vector");
if (!s7_is_integer(start_index)) s7_wrong_type_arg_error(s7, S_vct_spatter, 2, start_index, "an integer");
if (!s7_is_integer(end_index)) s7_wrong_type_arg_error(s7, S_vct_spatter, 3, end_index, "an integer");
if (!s7_is_real(start_x)) s7_wrong_type_arg_error(s7, S_vct_spatter, 4, start_x, "a real");
if (!s7_is_real(incr)) s7_wrong_type_arg_error(s7, S_vct_spatter, 5, incr, "a real");
if (!s7_is_real(val1)) s7_wrong_type_arg_error(s7, S_vct_spatter, 6, val1, "a real");
if (!s7_is_real(val2)) s7_wrong_type_arg_error(s7, S_vct_spatter, 7, val2, "a real");
beg = s7_integer(start_index);
lim = s7_integer(end_index);
x0 = s7_real(start_x);
dx = s7_real(incr);
x1 = s7_real(val1);
x2 = s7_real(val2);
for (i = beg; i < lim; i++, x0 += dx)
fv_vals[i] = (x0 * x1) + ((1.0 - x0) * x2);
return(val1);
}
#endif
#if (!HAVE_SCHEME)
static Xen g_vct_fill(Xen obj1, Xen obj2)
{
#define H_vct_fillB "(" S_vct_fill " v val): set each element of v to val: v[i] = val, returns v"
mus_long_t i; /* unsigned int is much slower */
vct *v1;
mus_float_t scl;
mus_float_t *d;
Xen_check_type(mus_is_vct(obj1), obj1, 1, S_vct_fill, A_VCT);
Xen_check_type(Xen_is_number(obj2), obj2, 2, S_vct_fill, "a number");
v1 = Xen_to_vct(obj1);
if (mus_vct_length(v1) == 0) return(obj1);
d = mus_vct_data(v1);
scl = Xen_real_to_C_double(obj2);
if (scl == 0.0)
memset((void *)d, 0, mus_vct_length(v1) * sizeof(mus_float_t));
else
{
mus_long_t lim8;
lim8 = mus_vct_length(v1) - 8;
i = 0;
while (i <= lim8)
{
d[i++] = scl;
d[i++] = scl;
d[i++] = scl;
d[i++] = scl;
d[i++] = scl;
d[i++] = scl;
d[i++] = scl;
d[i++] = scl;
}
for (; i < mus_vct_length(v1); i++)
d[i] = scl;
}
return(obj1);
}
#endif
double mus_vct_peak(vct *v)
{
mus_float_t val = 0.0, absv;
mus_float_t *d;
mus_long_t i, lim4, len;
len = mus_vct_length(v);
if (len == 0) return(0.0);
lim4 = len - 4;
i = 1;
d = mus_vct_data(v);
val = fabs(d[0]);
while (i <= lim4)
{
absv = fabs(d[i++]);
if (absv > val) val = absv;
absv = fabs(d[i++]);
if (absv > val) val = absv;
absv = fabs(d[i++]);
if (absv > val) val = absv;
absv = fabs(d[i++]);
if (absv > val) val = absv;
}
for (; i < len; i++)
{
absv = fabs(d[i]);
if (absv > val) val = absv;
}
return(val);
}
Xen g_vct_peak(Xen obj)
{
#define H_vct_peak "(" S_vct_peak " v): max of abs of elements of v"
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_peak, A_VCT);
return(C_double_to_Xen_real(mus_vct_peak(Xen_to_vct(obj))));
}
#if HAVE_SCHEME
#define S_vct_peak_and_location "float-vector-peak-and-location"
#else
#define S_vct_peak_and_location "vct-peak-and-location"
#endif
static Xen g_vct_peak_and_location(Xen obj)
{
#define H_vct_peak_and_location "(" S_vct_peak_and_location " v): max of abs of elements of v and its position in v"
mus_float_t val = 0.0;
mus_long_t i, loc = 0;
vct *v;
mus_float_t *d;
Xen_check_type(mus_is_vct(obj), obj, 1, S_vct_peak_and_location, "a " S_vct);
v = Xen_to_vct(obj);
d = mus_vct_data(v);
for (i = 0; i < mus_vct_length(v); i++)
{
mus_float_t absv;
absv = fabs(d[i]);
if (absv > val)
{
val = absv;
loc = i;
}
}
return(Xen_list_2(C_double_to_Xen_real(val), C_int_to_Xen_integer(loc)));
}
static Xen g_vct_subseq(Xen vobj, Xen start, Xen end, Xen newv)
{