1 files changed, 102 insertions, 0 deletions
diff --git a/src/3rdparty/proj/pj_ell_set.c b/src/3rdparty/proj/pj_ell_set.c
new file mode 100644
index 00000000..989701ec
--- /dev/null
+++ b/src/3rdparty/proj/pj_ell_set.c
@@ -0,0 +1,102 @@
+/* set ellipsoid parameters a and es */
+#include <projects.h>
+#include <string.h>
+#define SIXTH .1666666666666666667 /* 1/6 */
+#define RA4 .04722222222222222222 /* 17/360 */
+#define RA6 .02215608465608465608 /* 67/3024 */
+#define RV4 .06944444444444444444 /* 5/72 */
+#define RV6 .04243827160493827160 /* 55/1296 */
+	int /* initialize geographic shape parameters */
+pj_ell_set(paralist *pl, double *a, double *es) {
+	int i;
+	double b=0.0, e;
+	char *name;
+	paralist *start = 0, *curr;
+
+		/* check for varying forms of ellipsoid input */
+	*a = *es = 0.;
+	/* R takes precedence */
+	if (pj_param(pl, "tR").i)
+		*a = pj_param(pl, "dR").f;
+	else { /* probable elliptical figure */
+
+		/* check if ellps present and temporarily append its values to pl */
+		if (name = pj_param(pl, "sellps").s) {
+			char *s;
+
+			for (start = pl; start && start->next ; start = start->next) ;
+			curr = start;
+			for (i = 0; (s = pj_ellps[i].id) && strcmp(name, s) ; ++i) ;
+			if (!s) { pj_errno = -9; return 1; }
+			curr = curr->next = pj_mkparam(pj_ellps[i].major);
+			curr = curr->next = pj_mkparam(pj_ellps[i].ell);
+		}
+		*a = pj_param(pl, "da").f;
+		if (pj_param(pl, "tes").i) /* eccentricity squared */
+			*es = pj_param(pl, "des").f;
+		else if (pj_param(pl, "te").i) { /* eccentricity */
+			e = pj_param(pl, "de").f;
+			*es = e * e;
+		} else if (pj_param(pl, "trf").i) { /* recip flattening */
+			*es = pj_param(pl, "drf").f;
+			if (!*es) {
+				pj_errno = -10;
+				goto bomb;
+			}
+			*es = 1./ *es;
+			*es = *es * (2. - *es);
+		} else if (pj_param(pl, "tf").i) { /* flattening */
+			*es = pj_param(pl, "df").f;
+			*es = *es * (2. - *es);
+		} else if (pj_param(pl, "tb").i) { /* minor axis */
+			b = pj_param(pl, "db").f;
+			*es = 1. - (b * b) / (*a * *a);
+		}     /* else *es == 0. and sphere of radius *a */
+		if (!b)
+			b = *a * sqrt(1. - *es);
+		/* following options turn ellipsoid into equivalent sphere */
+		if (pj_param(pl, "bR_A").i) { /* sphere--area of ellipsoid */
+			*a *= 1. - *es * (SIXTH + *es * (RA4 + *es * RA6));
+			*es = 0.;
+		} else if (pj_param(pl, "bR_V").i) { /* sphere--vol. of ellipsoid */
+			*a *= 1. - *es * (SIXTH + *es * (RV4 + *es * RV6));
+			*es = 0.;
+		} else if (pj_param(pl, "bR_a").i) { /* sphere--arithmetic mean */
+			*a = .5 * (*a + b);
+			*es = 0.;
+		} else if (pj_param(pl, "bR_g").i) { /* sphere--geometric mean */
+			*a = sqrt(*a * b);
+			*es = 0.;
+		} else if (pj_param(pl, "bR_h").i) { /* sphere--harmonic mean */
+			*a = 2. * *a * b / (*a + b);
+			*es = 0.;
+		} else if ((i = pj_param(pl, "tR_lat_a").i) || /* sphere--arith. */
+			pj_param(pl, "tR_lat_g").i) { /* or geom. mean at latitude */
+			double tmp;
+
+			tmp = sin(pj_param(pl, i ? "rR_lat_a" : "rR_lat_g").f);
+			if (fabs(tmp) > HALFPI) {
+				pj_errno = -11;
+				goto bomb;
+			}
+			tmp = 1. - *es * tmp * tmp;
+			*a *= i ? .5 * (1. - *es + tmp) / ( tmp * sqrt(tmp)) :
+				sqrt(1. - *es) / tmp;
+			*es = 0.;
+		}
+bomb:
+		if (start) { /* clean up temporary extension of list */
+			pj_dalloc(start->next->next);
+			pj_dalloc(start->next);
+			start->next = 0;
+		}
+		if (pj_errno)
+			return 1;
+	}
+	/* some remaining checks */
+	if (*es < 0.)
+		{ pj_errno = -12; return 1; }
+	if (*a <= 0.)
+		{ pj_errno = -13; return 1; }
+	return 0;
+}