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The attached patch provides cube with 4 functions for building cubes

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directly from float8 values. (As opposed to converting the values to
strings
and then parsing the strings.)
The functions are:
cube(float8) returns cube
cube(float8,float8) returns cube
cube(cube,float8) returns cube
cube(cube,float8,float8) returns cube

Bruno Wolff III
This commit is contained in:
Bruce Momjian
2003-02-13 05:26:50 +00:00
parent f249daf9b7
commit 80b3513d57
5 changed files with 205 additions and 17 deletions
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85
contrib/cube/cube.c
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@ -30,6 +30,13 @@ extern int cube_yyparse();
NDBOX *cube_in(char *str);
NDBOX *cube(text *str);
char *cube_out(NDBOX * cube);
NDBOX *cube_f8(double *);
NDBOX *cube_f8_f8(double *, double *);
NDBOX *cube_c_f8(NDBOX *, double *);
NDBOX *cube_c_f8_f8(NDBOX *, double *, double *);
int4 cube_dim(NDBOX * a);
double *cube_ll_coord(NDBOX * a, int4 n);
double *cube_ur_coord(NDBOX * a, int4 n);
/*
@ -73,9 +80,6 @@ bool cube_right(NDBOX * a, NDBOX * b);
bool cube_lt(NDBOX * a, NDBOX * b);
bool cube_gt(NDBOX * a, NDBOX * b);
double *cube_distance(NDBOX * a, NDBOX * b);
int4 cube_dim(NDBOX * a);
double *cube_ll_coord(NDBOX * a, int4 n);
double *cube_ur_coord(NDBOX * a, int4 n);
bool cube_is_point(NDBOX * a);
NDBOX *cube_enlarge(NDBOX * a, double *r, int4 n);
@ -1226,3 +1230,78 @@ cube_enlarge(NDBOX * a, double *r, int4 n)
}
return result;
}
/* Create a one dimensional box with identical upper and lower coordinates */
NDBOX *
cube_f8(double *x1)
{
NDBOX *result;
int size;
size = offsetof(NDBOX, x[0]) + sizeof(double) * 2;
result = (NDBOX *) palloc(size);
memset(result, 0, size);
result->size = size;
result->dim = 1;
result->x[0] = *x1;
result->x[1] = *x1;
return result;
}
/* Create a one dimensional box */
NDBOX *
cube_f8_f8(double *x1, double *x2)
{
NDBOX *result;
int size;
size = offsetof(NDBOX, x[0]) + sizeof(double) * 2;
result = (NDBOX *) palloc(size);
memset(result, 0, size);
result->size = size;
result->dim = 1;
result->x[0] = *x1;
result->x[1] = *x2;
return result;
}
/* Add a dimension to an existing cube with the same values for the new
coordinate */
NDBOX *
cube_c_f8(NDBOX *c, double *x1)
{
NDBOX *result;
int size;
int i;
size = offsetof(NDBOX, x[0]) + sizeof(double) * (c->dim + 1) * 2;
result = (NDBOX *) palloc(size);
memset(result, 0, size);
result->size = size;
result->dim = c->dim + 1;
for (i = 0; i < c->dim; i++) {
result->x[i] = c->x[i];
result->x[result->dim + i] = c->x[c->dim + i];
}
result->x[result->dim - 1] = *x1;
result->x[2 * result->dim - 1] = *x1;
return result;
}
/* Add a dimension to an existing cube */
NDBOX *
cube_c_f8_f8(NDBOX *c, double *x1, double *x2)
{
NDBOX *result;
int size;
int i;
size = offsetof(NDBOX, x[0]) + sizeof(double) * (c->dim + 1) * 2;
result = (NDBOX *) palloc(size);
memset(result, 0, size);
result->size = size;
result->dim = c->dim + 1;
for (i = 0; i < c->dim; i++) {
result->x[i] = c->x[i];
result->x[result->dim + i] = c->x[c->dim + i];
}
result->x[result->dim - 1] = *x1;
result->x[2 * result->dim - 1] = *x2;
return result;
}