#ifndef __DT_ASTRO_LUNAR_C__ #define __DT_ASTRO_LUNAR_C__ #include "dt_astro.h" #define NV_1E6 1000000.0 STATIC_INLINE int lunar_longitude( mpfr_t *result, mpfr_t *moment ) { mpfr_t C, mean_moon, elongation, solar_anomaly, lunar_anomaly, moon_node, E, correction, venus, jupiter, flat_earth, N, fullangle; mpfr_init(C); julian_centuries( &C, moment ); { mpfr_t a, b, c, d, e; mpfr_init(mean_moon); mpfr_init_set_d(a, 218.316591, GMP_RNDN); mpfr_init_set_d(b, 481267.88134236, GMP_RNDN); mpfr_init_set_d(c, -0.0013268, GMP_RNDN); mpfr_init_set_ui(d, 1, GMP_RNDN); mpfr_div_ui(d, d, 538841, GMP_RNDN); mpfr_init_set_si(e, -1, GMP_RNDN); mpfr_div_ui(e, e, 65194000, GMP_RNDN); polynomial( &mean_moon, &C, 5, &a, &b, &c, &d, &e ); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); mpfr_clear(e); } { mpfr_t a, b, c, d, e; mpfr_init(elongation); mpfr_init_set_d(a, 297.8502042, GMP_RNDN); mpfr_init_set_d(b, 445267.1115168, GMP_RNDN); mpfr_init_set_d(c, -0.00163, GMP_RNDN); mpfr_init_set_ui(d, 1, GMP_RNDN); mpfr_div_ui(d, d, 545868, GMP_RNDN); mpfr_init_set_si(e, -1, GMP_RNDN); mpfr_div_ui(e, e, 113065000, GMP_RNDN); polynomial( &elongation, &C, 5, &a, &b, &c, &d, &e ); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); mpfr_clear(e); } { mpfr_t a, b, c, d; mpfr_init(solar_anomaly); mpfr_init_set_d(a, 357.5291092, GMP_RNDN); mpfr_init_set_d(b, 35999.0502909, GMP_RNDN); mpfr_init_set_d(c, -0.0001536, GMP_RNDN); mpfr_init_set_ui(d, 1, GMP_RNDN); mpfr_div_ui(d, d, 24490000, GMP_RNDN); polynomial( &solar_anomaly, &C, 4, &a, &b, &c, &d ); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); } { mpfr_t a, b, c, d, e; mpfr_init(lunar_anomaly); mpfr_init_set_d(a, 134.9634114, GMP_RNDN); mpfr_init_set_d(b, 477198.8676313, GMP_RNDN); mpfr_init_set_d(c, 0.0008997, GMP_RNDN); mpfr_init_set_ui(d, 1, GMP_RNDN); mpfr_div_ui(d, d, 69699, GMP_RNDN); mpfr_init_set_si(e, -1, GMP_RNDN); mpfr_div_ui(e, e, 14712000, GMP_RNDN); polynomial( &lunar_anomaly, &C, 5, &a, &b, &c, &d, &e); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); mpfr_clear(e); } { mpfr_t a, b, c, d, e; mpfr_init(moon_node); mpfr_init_set_d(a, 93.2720993, GMP_RNDN); mpfr_init_set_d(b, 483202.0175273, GMP_RNDN); mpfr_init_set_d(c, -0.0034029, GMP_RNDN); mpfr_init_set_si(d, -1, GMP_RNDN); mpfr_div_ui(d, d, 3526000, GMP_RNDN); mpfr_init_set_ui(e, 1, GMP_RNDN); mpfr_div_ui(e, e, 863310000, GMP_RNDN); polynomial(&moon_node, &C, 5, &a, &b, &c, &d, &e); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); mpfr_clear(e); } { mpfr_t a, b, c; mpfr_init(E); mpfr_init_set_ui(a, 1, GMP_RNDN); mpfr_init_set_d(b, -0.002516, GMP_RNDN); mpfr_init_set_d(c, -0.0000074, GMP_RNDN); polynomial( &E, &C, 3, &a, &b, &c ); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); } { int i; mpfr_t fugly; mpfr_init_set_ui(fugly, 0, GMP_RNDN); for(i = 0; i < LUNAR_LONGITUDE_ARGS_SIZE; i++) { mpfr_t a, b, v, w, x, y, z; mpfr_init_set_d( v, LUNAR_LONGITUDE_ARGS[i][0], GMP_RNDN ); mpfr_init_set_d( w, LUNAR_LONGITUDE_ARGS[i][1], GMP_RNDN ); mpfr_init_set_d( x, LUNAR_LONGITUDE_ARGS[i][2], GMP_RNDN ); mpfr_init_set_d( y, LUNAR_LONGITUDE_ARGS[i][3], GMP_RNDN ); mpfr_init_set_d( z, LUNAR_LONGITUDE_ARGS[i][4], GMP_RNDN ); mpfr_init(b); mpfr_pow(b, E, x, GMP_RNDN); mpfr_mul(w, w, elongation, GMP_RNDN); mpfr_mul(x, x, solar_anomaly, GMP_RNDN); mpfr_mul(y, y, lunar_anomaly, GMP_RNDN); mpfr_mul(z, z, moon_node, GMP_RNDN); mpfr_init_set(a, w, GMP_RNDN); mpfr_add(a, a, x, GMP_RNDN); mpfr_add(a, a, y, GMP_RNDN); mpfr_add(a, a, z, GMP_RNDN); dt_astro_sin(&a, &a); mpfr_mul(a, a, v, GMP_RNDN); mpfr_mul(a, a, b, GMP_RNDN); mpfr_add(fugly, fugly, a, GMP_RNDN); mpfr_clear(a); mpfr_clear(b); mpfr_clear(v); mpfr_clear(w); mpfr_clear(x); mpfr_clear(y); mpfr_clear(z); } mpfr_init_set_d( correction, 0.000001, GMP_RNDN ); mpfr_mul( correction, correction, fugly, GMP_RNDN); mpfr_clear(fugly); } { mpfr_t a, b; mpfr_init(venus); mpfr_init_set_d(a, 119.75, GMP_RNDN); mpfr_init_set(b, C, GMP_RNDN); mpfr_mul_d(b, b, 131.849, GMP_RNDN); mpfr_add(a, a, b, GMP_RNDN); dt_astro_sin(&a, &a); mpfr_mul_d(venus, a, 0.003957, GMP_RNDN ); mpfr_clear(a); mpfr_clear(b); } { mpfr_t a, b; mpfr_init(jupiter); mpfr_init_set_d(a, 53.09, GMP_RNDN); mpfr_init_set(b, C, GMP_RNDN); mpfr_mul_d(b, b, 479264.29, GMP_RNDN); mpfr_add(a, a, b, GMP_RNDN); dt_astro_sin(&a, &a); mpfr_mul_d(jupiter, a, 0.000318, GMP_RNDN ); mpfr_clear(a); mpfr_clear(b); } { mpfr_t a; mpfr_init(flat_earth); mpfr_init_set(a, mean_moon, GMP_RNDN); mpfr_sub(a, a, moon_node, GMP_RNDN); dt_astro_sin(&a, &a); mpfr_mul_d(flat_earth, a, 0.001962, GMP_RNDN); mpfr_clear(a); } mpfr_set(*result, mean_moon, GMP_RNDN); mpfr_add(*result, *result, correction, GMP_RNDN); mpfr_add(*result, *result, venus, GMP_RNDN); mpfr_add(*result, *result, jupiter, GMP_RNDN); mpfr_add(*result, *result, flat_earth, GMP_RNDN); #ifdef ANNOYING_DEBUG #if (ANNOYING_DEBUG) mpfr_fprintf(stderr, "mean_moon = %.10RNf\ncorrection = %.10RNf\nvenus = %.10RNf\njupiter = %.10RNf\nflat_earth = %.10RNf\n", mean_moon, correction, venus, jupiter, flat_earth); #endif #endif mpfr_init(N); nutation(&N, moment); mpfr_add(*result, *result, N, GMP_RNDN); mpfr_init_set_ui(fullangle, 360, GMP_RNDN); #ifdef ANNOYING_DEBUG #if (ANNOYING_DEBUG) mpfr_fprintf(stderr, "lunar = mod(%.10RNf) = ", *result ); #endif #endif dt_astro_mod(result, result, &fullangle); #ifdef ANNOYING_DEBUG #if (ANNOYING_DEBUG) mpfr_fprintf(stderr, "%.10RNf\n", *result ); #endif #endif mpfr_clear(C); mpfr_clear(mean_moon); mpfr_clear(elongation); mpfr_clear(solar_anomaly); mpfr_clear(lunar_anomaly); mpfr_clear(moon_node); mpfr_clear(E); mpfr_clear(correction); mpfr_clear(venus); mpfr_clear(jupiter); mpfr_clear(flat_earth); mpfr_clear(N); mpfr_clear(fullangle); return 1; } STATIC_INLINE int lunar_phase( mpfr_t *result, mpfr_t *moment ) { mpfr_t sl, ll, fullangle; mpfr_init(sl); mpfr_init(ll); mpfr_init_set_ui(fullangle, 360, GMP_RNDN); solar_longitude( &sl, moment ); lunar_longitude( &ll, moment ); mpfr_sub(*result, ll, sl, GMP_RNDN ); dt_astro_mod(result, result, &fullangle); mpfr_clear(sl); mpfr_clear(ll); mpfr_clear(fullangle); return 1; } STATIC_INLINE void adjust_lunar_phase_to_zero(mpfr_t *result) { mpfr_t ll, delta; int mode = -1; int loop = 1; int count = 0; /* Adjust values so that it's as close as possible to 0 degrees. * if we have a delta of 1 degree, then we're about * 1 / ( 360 / MEAN_SYNODIC_MONTH ) * days apart */ mpfr_init(ll); mpfr_init_set_d(delta, 0.0001, GMP_RNDN); while (loop) { int flipped = mode; mpfr_t new_moment; count++; mpfr_init(new_moment); lunar_phase(&ll, result); #if (TRACE) mpfr_fprintf(stderr, "Adjusting ll from (%.30RNf) moment is %.5RNf delta is %.30RNf\n", ll, *result, delta); #endif /* longitude was greater than 180, so we're looking to add a few * degrees to make it close to 360 ( 0 ) */ if (mpfr_cmp_ui( ll, 180 ) > 0) { mode = 1; mpfr_sub_ui(delta, ll, 360, GMP_RNDN); mpfr_div_d(delta, delta, 360 / MEAN_SYNODIC_MONTH, GMP_RNDN); mpfr_add( new_moment, *result, delta, GMP_RNDN ); #if (TRACE) mpfr_fprintf(stderr, "add %.30RNf -> %.30RNf\n", *result, new_moment); #endif mpfr_set(*result, new_moment, GMP_RNDN); if (mpfr_cmp(new_moment, *result) == 0) { loop = 0; } } else if (mpfr_cmp_ui( ll, 180 ) < 0 ) { if ( mpfr_cmp_d( ll, 0.000000000000000000001 ) < 0) { loop = 0; } else { mode = 0; mpfr_sub_ui(delta, ll, 0, GMP_RNDN); mpfr_div_d(delta, delta, 360 / MEAN_SYNODIC_MONTH, GMP_RNDN); mpfr_sub( new_moment, *result, delta, GMP_RNDN ); #if (TRACE) mpfr_fprintf(stderr, "sub %.120RNf -> %.120RNf\n", *result, new_moment); #endif if (mpfr_cmp(new_moment, *result) == 0) { loop = 0; } mpfr_set(*result, new_moment, GMP_RNDN); } } else { loop = 0; } if (flipped != -1 && flipped != mode) { mpfr_div_d(delta, delta, 1.1, GMP_RNDN); } mpfr_clear(new_moment); } mpfr_clear(delta); mpfr_clear(ll); } STATIC_INLINE int nth_new_moon( mpfr_t *result, int n_int ) { mpfr_t n, k, C, approx, E, solar_anomaly, lunar_anomaly, moon_argument, omega, extra, correction, additional; #if(0) PerlIO_printf(PerlIO_stderr(), "nth_new_moon = %d\n", n_int ); #endif if ( dt_astro_global_cache.cache_size > n_int ) { mpfr_t *cached = dt_astro_global_cache.cache[n_int]; if (cached != NULL) { #if(0) PerlIO_printf(PerlIO_stderr(), "Cache HIT for %d\n", n_int); #endif mpfr_set( *result, *cached, GMP_RNDN ); return 1; } } mpfr_init_set_ui( n, n_int, GMP_RNDN ); /* k = n - 24724 */ mpfr_init_set(k, n, GMP_RNDN); mpfr_sub_ui(k, k, 24724, GMP_RNDN ); /* c = k / 1236.85 */ mpfr_init_set(C, k, GMP_RNDN ); mpfr_div_d(C, C, 1236.85, GMP_RNDN); { mpfr_t a, b, c, d, e; mpfr_init(approx); mpfr_init_set_d(a, 730125.59765, GMP_RNDN ); mpfr_init_set_d(b, MEAN_SYNODIC_MONTH * 1236.85, GMP_RNDN ); mpfr_init_set_d(c, 0.0001337, GMP_RNDN ); mpfr_init_set_d(d, -0.000000150, GMP_RNDN ); mpfr_init_set_d(e, 0.00000000073, GMP_RNDN ); polynomial( &approx, &C, 5, &a, &b, &c, &d, &e ); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); mpfr_clear(e); #ifdef ANNOYING_DEBUG #if (ANNOYING_DEBUG) mpfr_fprintf(stderr, "approx = %.10RNf\n", approx); #endif #endif } { mpfr_t a, b, c; mpfr_init(E); mpfr_init_set_ui(a, 1, GMP_RNDN); mpfr_init_set_d(b, -0.002516, GMP_RNDN ); mpfr_init_set_d(c, -0.0000074, GMP_RNDN ); polynomial( &E, &C, 3, &a, &b, &c ); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); } { mpfr_t a, b, c, d; mpfr_init(solar_anomaly); mpfr_init_set_d(a, 2.5534, GMP_RNDN); mpfr_init_set_d(b, 1236.85, GMP_RNDN); mpfr_mul_d(b, b, 29.10535669, GMP_RNDN); mpfr_init_set_d(c, -0.0000218, GMP_RNDN ); mpfr_init_set_d(d, -0.00000011, GMP_RNDN ); polynomial( &solar_anomaly, &C, 4, &a, &b, &c, &d); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); } { mpfr_t a, b, c, d, e; mpfr_init(lunar_anomaly); mpfr_init_set_d(a, 201.5643, GMP_RNDN); mpfr_init_set_d(b, 385.81693528 * 1236.85, GMP_RNDN); mpfr_init_set_d(c, 0.0107438, GMP_RNDN); mpfr_init_set_d(d, 0.00001239, GMP_RNDN); mpfr_init_set_d(e, -0.000000058, GMP_RNDN); polynomial( &lunar_anomaly, &C, 5, &a, &b, &c, &d, &e); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); mpfr_clear(e); } { mpfr_t a, b, c, d, e; mpfr_init(moon_argument); mpfr_init_set_d(a, 160.7108, GMP_RNDN); mpfr_init_set_d(b, 390.67050274 * 1236.85, GMP_RNDN); mpfr_init_set_d(c, -0.0016431, GMP_RNDN); mpfr_init_set_d(d, -0.00000227, GMP_RNDN); mpfr_init_set_d(e, 0.000000011, GMP_RNDN); polynomial( &moon_argument, &C, 5, &a, &b, &c, &d, &e); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); mpfr_clear(e); } { mpfr_t a, b, c, d; mpfr_init(omega); mpfr_init_set_d(a, 124.7746, GMP_RNDN); mpfr_init_set_d(b, -1.56375580 * 1236.85, GMP_RNDN); mpfr_init_set_d(c, 0.0020691, GMP_RNDN); mpfr_init_set_d(d, 0.00000215, GMP_RNDN); polynomial( &omega, &C, 4, &a, &b, &c, &d); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); mpfr_clear(d); } { mpfr_t a, b, c; mpfr_init(extra); mpfr_init_set_d(a, 299.77, GMP_RNDN); mpfr_init_set_d(b, 132.8475848, GMP_RNDN); mpfr_init_set_d(c, -0.009173, GMP_RNDN); polynomial(&extra, &C, 3, &a, &b, &c); dt_astro_sin(&extra, &extra); mpfr_mul_d(extra, extra, 0.000325, GMP_RNDN); mpfr_clear(a); mpfr_clear(b); mpfr_clear(c); } mpfr_init(correction); dt_astro_sin(&correction, &omega); mpfr_mul_d(correction, correction, -0.00017, GMP_RNDN); { int i; for( i = 0; i < NTH_NEW_MOON_CORRECTION_ARGS_SIZE; i++ ) { mpfr_t a, v, w, x, y, z; mpfr_init_set_d(v, NTH_NEW_MOON_CORRECTION_ARGS[i][0], GMP_RNDN); mpfr_init_set_d(w, NTH_NEW_MOON_CORRECTION_ARGS[i][1], GMP_RNDN); mpfr_init_set_d(x, NTH_NEW_MOON_CORRECTION_ARGS[i][2], GMP_RNDN); mpfr_init_set_d(y, NTH_NEW_MOON_CORRECTION_ARGS[i][3], GMP_RNDN); mpfr_init_set_d(z, NTH_NEW_MOON_CORRECTION_ARGS[i][4], GMP_RNDN); mpfr_mul(x, x, solar_anomaly, GMP_RNDN); mpfr_mul(y, y, lunar_anomaly, GMP_RNDN); mpfr_mul(z, z, moon_argument, GMP_RNDN); mpfr_add(x, x, y, GMP_RNDN); mpfr_add(x, x, z, GMP_RNDN); dt_astro_sin(&x, &x); mpfr_init(a); mpfr_pow(a, E, w, GMP_RNDN); mpfr_mul(a, a, v, GMP_RNDN); mpfr_mul(a, a, x, GMP_RNDN); mpfr_add( correction, correction, a, GMP_RNDN ); mpfr_clear(a); mpfr_clear(v); mpfr_clear(w); mpfr_clear(x); mpfr_clear(y); mpfr_clear(z); } } { int z; mpfr_init_set_ui(additional, 0, GMP_RNDN); for (z = 0; z < NTH_NEW_MOON_ADDITIONAL_ARGS_SIZE; z++) { mpfr_t i, j, l; mpfr_init_set_d(i, NTH_NEW_MOON_ADDITIONAL_ARGS[z][0], GMP_RNDN); mpfr_init_set_d(j, NTH_NEW_MOON_ADDITIONAL_ARGS[z][1], GMP_RNDN); mpfr_init_set_d(l, NTH_NEW_MOON_ADDITIONAL_ARGS[z][2], GMP_RNDN); mpfr_mul(j, j, k, GMP_RNDN); mpfr_add(j, j, i, GMP_RNDN); dt_astro_sin(&j, &j); mpfr_mul(l, l, j, GMP_RNDN); mpfr_add(additional, additional, l, GMP_RNDN); mpfr_clear(i); mpfr_clear(j); mpfr_clear(l); } } #ifdef ANNOYING_DEBUG #if (ANNOYING_DEBUG) mpfr_fprintf(stderr, "correction = %.10RNf\nextra = %.10RNf\nadditional = %.10RNf\n", correction, extra, additional ); #endif #endif mpfr_set(*result, approx, GMP_RNDN); mpfr_add(*result, *result, correction, GMP_RNDN); mpfr_add(*result, *result, extra, GMP_RNDN); mpfr_add(*result, *result, additional, GMP_RNDN); adjust_lunar_phase_to_zero( result ); mpfr_clear(n); mpfr_clear(k); mpfr_clear(C); mpfr_clear(approx); mpfr_clear(E); mpfr_clear(solar_anomaly); mpfr_clear(lunar_anomaly); mpfr_clear(moon_argument); mpfr_clear(omega); mpfr_clear(extra); mpfr_clear(correction); mpfr_clear(additional); if (dt_astro_global_cache.cache_size == 0) { dt_astro_global_cache.cache_size = 200000; Newxz( dt_astro_global_cache.cache, dt_astro_global_cache.cache_size, mpfr_t * ); } if (dt_astro_global_cache.cache_size < n_int + 1) { int new_size = dt_astro_global_cache.cache_size * 2; Renew( dt_astro_global_cache.cache, new_size, mpfr_t *); dt_astro_global_cache.cache_size = new_size; } { mpfr_t *new_data; Newxz( new_data, 1, mpfr_t ); mpfr_init( *new_data ); mpfr_set( *new_data, *result, GMP_RNDN ); dt_astro_global_cache.cache[n_int] = new_data; #if (0) PerlIO_printf(PerlIO_stderr(), "CACHE set for %d\n", n_int); #endif } return 1; } /* TODO: Check out errata 269 on http://emr.cs.uiuc.edu/home/reingold/calendar-book/second-edition/errata.pdf */ STATIC_INLINE int new_moon_before_from_moment(mpfr_t *result, mpfr_t *o_moment) { mpfr_t t0, phi, big_n, radian, delta; mpfr_t fullangle; long n; mpfr_init(t0); nth_new_moon(&t0, 0); mpfr_init(phi); lunar_phase( &phi, o_moment ); mpfr_init_set(delta, *o_moment, GMP_RNDN); mpfr_sub(delta, delta, t0, GMP_RNDN); mpfr_div_d(delta, delta, MEAN_SYNODIC_MONTH, GMP_RNDN); mpfr_init_set_ui( fullangle, 360, GMP_RNDN ); mpfr_init_set(radian, phi, GMP_RNDN); mpfr_div(radian, radian, fullangle, GMP_RNDN ); mpfr_init_set(big_n, delta, GMP_RNDN); mpfr_sub(big_n, big_n, radian, GMP_RNDN); mpfr_round(big_n, big_n); n = mpfr_get_si(big_n, GMP_RNDN); mpfr_clear(t0); mpfr_clear(phi); mpfr_clear(big_n); mpfr_clear(radian); mpfr_clear(delta); mpfr_clear(fullangle); { int increment = 1; mpfr_t last_good, tmp; mpfr_init(tmp); mpfr_init(last_good); n = n - 1; nth_new_moon( &last_good, n ); while (increment) { nth_new_moon( &tmp, n ); if (mpfr_cmp( tmp, *o_moment ) < 0) { n = n + 1; mpfr_set( last_good, tmp, GMP_RNDN ); } else { increment = 0; mpfr_set( *result, last_good, GMP_RNDN ); } } mpfr_clear(tmp); mpfr_clear(last_good); } return 1; } STATIC_INLINE int new_moon_after_from_moment(mpfr_t *result, mpfr_t *o_moment) { mpfr_t t0, phi, big_n, radian, delta; mpfr_t fullangle; long n; mpfr_init(t0); nth_new_moon(&t0, 0); mpfr_init(phi); lunar_phase( &phi, o_moment ); mpfr_init_set(delta, *o_moment, GMP_RNDN); mpfr_sub(delta, delta, t0, GMP_RNDN); mpfr_div_d(delta, delta, MEAN_SYNODIC_MONTH, GMP_RNDN); mpfr_init_set_ui( fullangle, 360, GMP_RNDN ); mpfr_init_set(radian, phi, GMP_RNDN); mpfr_div(radian, radian, fullangle, GMP_RNDN ); mpfr_init_set(big_n, delta, GMP_RNDN); mpfr_sub(big_n, big_n, radian, GMP_RNDN); mpfr_round(big_n, big_n); n = mpfr_get_si(big_n, GMP_RNDN); mpfr_clear(t0); mpfr_clear(phi); mpfr_clear(big_n); mpfr_clear(radian); mpfr_clear(delta); mpfr_clear(fullangle); nth_new_moon( result, n ); #if (0) mpfr_fprintf(stderr, "got result = %.10RNf against %.10RNf\n", result, o_moment); #endif { /* if the result and moment are too close to each other, we wrongly match the same time. fractional parts below 0.0001 doesn't make any change to the calculation, so we make that exception, and make sure to think of those two as the same */ int loop_count = 0; int cmp_result = -1; mpfr_t delta; mpfr_init(delta); while (cmp_result <= 0) { loop_count++; cmp_result = mpfr_cmp( *result, *o_moment ); if (cmp_result > 0) { mpfr_dim(delta, *result, *o_moment, GMP_RNDN); if (mpfr_cmp_d(delta, 0.001) <= 0) { cmp_result = 0; } } if (cmp_result <= 0) { n = n + 1; nth_new_moon( result, n ); } } mpfr_clear(delta); } return 1; } #endif /** __DT_ASTRO_LUNAR_C__ **/