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#ifndef _COMMON_H
#define _COMMON_H
#include <string.h>
#include <stdio.h>
#include <assert.h>
#include <math.h>
enum val_type { VEC3D, BOX, ENTITY_DIMEN };
struct val {
enum val_type type;
};
struct vec3d {
enum val_type type;
double x;
double y;
double z;
};
struct box {
enum val_type type;
double min_x;
double min_y;
double min_z;
double max_x;
double max_y;
double max_z;
};
struct entity_dimen {
enum val_type type;
double width;
double height;
};
static inline double *val_get_index(struct val *val, int index)
{
switch (val->type)
{
case VEC3D:
{
struct vec3d *d_v3d = (struct vec3d *)val;
switch (index)
{
case 0: return &d_v3d->x;
case 1: return &d_v3d->y;
case 2: return &d_v3d->z;
default: assert(0);
}
}
case BOX:
{
struct box *v_box = (struct box *)val;
switch (index)
{
case 0: return &v_box->min_x;
case 1: return &v_box->min_y;
case 2: return &v_box->min_z;
case 3: return &v_box->max_x;
case 4: return &v_box->max_y;
case 5: return &v_box->max_z;
default: assert(0);
}
}
case ENTITY_DIMEN:
{
struct entity_dimen *v_dimen = (struct entity_dimen *)val;
switch (index)
{
case 0: return &v_dimen->width;
case 1: return &v_dimen->height;
default: assert(0);
}
}
default:
assert(0);
}
}
static int val_parse(char *in, struct val *o)
{
int i = 0;
char *p = strtok(in, ",");
int required_vars = 0;
switch (o->type)
{
case VEC3D:
required_vars = 3;
break;
case BOX:
required_vars = 6;
break;
case ENTITY_DIMEN:
required_vars = 2;
break;
}
while (p != NULL)
{
sscanf(p, "%lf", val_get_index(o, i++));
p = strtok(NULL, ",");
}
if (i != required_vars)
{
fprintf(stderr, "Invalid value: %s.\n", in);
return 64;
}
return 0;
}
#endif /* _COMMON_H */
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