99 lines
2.3 KiB
C
99 lines
2.3 KiB
C
/*
|
|
* Utility functions.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "verse_header.h"
|
|
#include "v_network.h"
|
|
#include "v_util.h"
|
|
|
|
/* Safe string copy. Copies from <src> to <dst>, not using more than <size>
|
|
* bytes of destination space. Always 0-terminates the destination. Returns
|
|
* the beginning of the destination string.
|
|
*/
|
|
char * v_strlcpy(char *dst, const char *src, size_t size)
|
|
{
|
|
char *base = dst;
|
|
|
|
if(size == 0)
|
|
return NULL;
|
|
for(size--; size > 0 && *src != '\0'; size--)
|
|
*dst++ = *src++;
|
|
*dst = '\0';
|
|
|
|
return base;
|
|
}
|
|
|
|
void v_timer_start(VUtilTimer *timer)
|
|
{
|
|
v_n_get_current_time(&timer->seconds, &timer->fractions);
|
|
}
|
|
|
|
void v_timer_advance(VUtilTimer *timer, double seconds)
|
|
{
|
|
if(timer == NULL)
|
|
return;
|
|
timer->seconds += (uint32) seconds;
|
|
timer->fractions += (uint32) ((seconds - (int) seconds) * (double) 0xffffffff);
|
|
}
|
|
|
|
double v_timer_elapsed(const VUtilTimer *timer)
|
|
{
|
|
uint32 cur_seconds, cur_fractions;
|
|
|
|
v_n_get_current_time(&cur_seconds, &cur_fractions);
|
|
return (double)(cur_seconds - timer->seconds) + ((double)cur_fractions - (double)timer->fractions) / (double) 0xffffffff;
|
|
}
|
|
|
|
void v_timer_print(const VUtilTimer *timer)
|
|
{
|
|
uint32 cur_seconds, cur_fractions;
|
|
|
|
v_n_get_current_time(&cur_seconds, &cur_fractions);
|
|
printf("%f", (double)(cur_seconds - timer->seconds) + ((double)cur_fractions - (double)timer->fractions) / (double) 0xffffffff);
|
|
}
|
|
|
|
/* Compare |x| against built-in semi-magical constant, and return 1 if it's larger, 0 if not. */
|
|
static int quat_valid(real64 x)
|
|
{
|
|
const real64 EPSILON = 0.0000001;
|
|
return x > 0.0 ? x > EPSILON : x < -EPSILON;
|
|
}
|
|
|
|
int v_quat32_valid(const VNQuat32 *q)
|
|
{
|
|
if(q == NULL)
|
|
return 0;
|
|
return quat_valid(q->x) && quat_valid(q->y) && quat_valid(q->z) && quat_valid(q->w);
|
|
}
|
|
|
|
int v_quat64_valid(const VNQuat64 *q)
|
|
{
|
|
if(q == NULL)
|
|
return 0;
|
|
return quat_valid(q->x) && quat_valid(q->y) && quat_valid(q->z) && quat_valid(q->w);
|
|
}
|
|
|
|
VNQuat32 * v_quat32_from_quat64(VNQuat32 *dst, const VNQuat64 *src)
|
|
{
|
|
if(dst == NULL || src == NULL)
|
|
return NULL;
|
|
dst->x = (real32) src->x;
|
|
dst->y = (real32) src->y;
|
|
dst->z = (real32) src->z;
|
|
dst->w = (real32) src->w;
|
|
return dst;
|
|
}
|
|
|
|
VNQuat64 * v_quat64_from_quat32(VNQuat64 *dst, const VNQuat32 *src)
|
|
{
|
|
if(dst == NULL || src == NULL)
|
|
return NULL;
|
|
dst->x = src->x;
|
|
dst->y = src->y;
|
|
dst->z = src->z;
|
|
dst->w = src->w;
|
|
return dst;
|
|
}
|