refactor(expvc/common): move common structs and functions to common.h

1 files changed, 48 insertions, 0 deletions

diff --git a/common.h b/common.h
new file mode 100644
index 0000000..30620fd
--- /dev/null
+++ b/common.h
@@ -0,0 +1,48 @@
+#ifndef _COMMON_H
+#define _COMMON_H
+
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+#include <math.h>
+
+struct vec3d {
+	double x;
+	double y;
+	double z;
+};
+
+static int vec3d_parse(char *in, struct vec3d *out)
+{
+	int i = 0;
+	char *p = strtok(in, ",");
+	while (p != NULL)
+	{
+		double *ptr;
+		switch (i ++)
+		{
+			case 0:
+				ptr = &out->x;
+				break;
+			case 1:
+				ptr = &out->y;
+				break;
+			case 2:
+				ptr = &out->z;
+				break;
+			default:
+				assert(0);
+				break;
+		}
+		sscanf(p, "%lf", ptr);
+		p = strtok(NULL, ",");
+	}
+	if (i != 3)
+	{
+		fprintf(stderr, "Invalid Vec3D: %s. Example: -1,1,1.\n", in);
+		return 64;
+	}
+	return 0;
+}
+
+#endif /* _COMMON_H */