New

git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@776 4e78687f-474d-0410-85f9-8d5e500ac6b2

1 files changed, 78 insertions, 0 deletions

diff --git a/src/dmstor.c b/src/dmstor.c
new file mode 100644
index 00000000..5b4bccf1
--- /dev/null
+++ b/src/dmstor.c
@@ -0,0 +1,78 @@
+/* Convert DMS string to radians */
+#ifndef lint
+static const char SCCSID[]="@(#)dmstor.c	4.4	93/06/16	GIE	REL";
+#endif
+#include <projects.h>
+#include <string.h>
+#include <ctype.h>
+
+/* following should be sufficient for all but the rediculous */
+#define MAX_WORK 64
+	static const char
+*sym = "NnEeSsWw";
+	static const double
+vm[] = {
+	.0174532925199433,
+	.0002908882086657216,
+	.0000048481368110953599
+};
+	double
+dmstor(const char *is, char **rs) {
+	int sign, n, nl;
+	char *p, *s, work[MAX_WORK];
+	double v, tv;
+
+	if (rs)
+		*rs = (char *)is;
+	/* copy sting into work space */
+	while (isspace(sign = *is)) ++is;
+	for (n = MAX_WORK, s = work, p = (char *)is; isgraph(*p) && --n ; )
+		*s++ = *p++;
+	*s = '\0';
+	/* it is possible that a really odd input (like lots of leading
+		zeros) could be truncated in copying into work.  But ... */
+	sign = *(s = work);
+	if (sign == '+' || sign == '-') s++;
+	else sign = '+';
+	for (v = 0., nl = 0 ; nl < 3 ; nl = n + 1 ) {
+		if (!(isdigit(*s) || *s == '.')) break;
+		if ((tv = strtod(s, &s)) == HUGE_VAL)
+			return tv;
+		switch (*s) {
+		case 'D': case 'd':
+			n = 0; break;
+		case '\'':
+			n = 1; break;
+		case '"':
+			n = 2; break;
+		case 'r': case 'R':
+			if (nl) {
+				pj_errno = -16;
+				return HUGE_VAL;
+			}
+			++s;
+			v = tv;
+			goto skip;
+		default:
+			v += tv * vm[nl];
+		skip:	n = 4;
+			continue;
+		}
+		if (n < nl) {
+			pj_errno = -16;
+			return HUGE_VAL;
+		}
+		v += tv * vm[n];
+		++s;
+	}
+		/* postfix sign */
+	if (*s && (p = strchr(sym, *s))) {
+		sign = (p - sym) >= 4 ? '-' : '+';
+		++s;
+	}
+	if (sign == '-')
+		v = -v;
+	if (rs) /* return point of next char after valid string */
+		*rs = (char *)is + (s - work);
+	return v;
+}