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