1 files changed, 92 insertions, 0 deletions
diff --git a/include/stl.h b/include/stl.h
new file mode 100644
index 0000000..14ec11a
--- /dev/null
+++ b/include/stl.h
@@ -0,0 +1,92 @@
+#pragma once
+
+#include <stdbool.h>
+#include <stdlib.h>
+
+#define STL_BUFMAX 256
+
+#define STL_STRERROR_INIT \
+	[STL_OK] = "Success", \
+	[STL_DONE] = "Done processing", \
+	[STL_INVALID] = "Invalid stl file", \
+	[STL_INVALID_ARG] = "Invalid argument", \
+	[STL_INCOMPLETE] = "Unexpected end of file" \
+
+enum {
+	STL_OK,
+	STL_DONE,
+	STL_INVALID,
+	STL_INVALID_ARG,
+	STL_INCOMPLETE,
+};
+
+enum {
+	STL_TYPE_DETECT,
+	STL_TYPE_ASCII,
+	STL_TYPE_BINARY,
+};
+
+enum {
+	STL_RES_SOLID_NAME,
+	STL_RES_HEADER,
+	STL_RES_TRIANGLE,
+	STL_RES_FILETYPE
+};
+
+struct stl_vertex {
+	union {
+		struct {
+			float x, y, z;
+		};
+		struct {
+			float dim[3];
+		};
+	};
+};
+
+struct stl_triangle {
+	struct stl_vertex vtx[3];
+	struct stl_vertex normal;
+};
+
+struct stl_span {
+	const char *str;
+	size_t len;
+};
+
+struct stl_result {
+	int type;
+	union {
+		struct stl_span solid_name;
+		struct stl_span header;
+		struct stl_triangle tri;
+		int filetype;
+	};
+};
+
+struct stl {
+	char buf[STL_BUFMAX];
+	size_t buflen;
+
+	const void *chunk;
+	const void *pos;
+	size_t nleft;
+
+	struct stl_triangle tri;
+
+	int type;
+	union {
+		struct {
+			int state;
+		} ascii;
+		struct {
+			int state;
+			size_t index;
+			size_t count;
+		} bin;
+	};
+};
+
+void stl_init(struct stl *stl, int type);
+int stl_feed(struct stl *stl, struct stl_result *res,
+	const void *chunk, size_t size);