tree-sitter: vendor tree-sitter runtime

tree-sitter/tree-sitter commit 7685b7861ca475664b6ef57e14d1da9acf741275

Included files are:
lib/include/tree-sitter/*.h
lib/src/*.[ch]
LICENSE

src/tree_sitter/point.h

@@ -0,0 +1,53 @@
+#ifndef TREE_SITTER_POINT_H_
+#define TREE_SITTER_POINT_H_
+
+#include "tree_sitter/api.h"
+
+#define POINT_MAX ((TSPoint) {UINT32_MAX, UINT32_MAX})
+
+static inline TSPoint point__new(unsigned row, unsigned column) {
+  TSPoint result = {row, column};
+  return result;
+}
+
+static inline TSPoint point_add(TSPoint a, TSPoint b) {
+  if (b.row > 0)
+    return point__new(a.row + b.row, b.column);
+  else
+    return point__new(a.row, a.column + b.column);
+}
+
+static inline TSPoint point_sub(TSPoint a, TSPoint b) {
+  if (a.row > b.row)
+    return point__new(a.row - b.row, a.column);
+  else
+    return point__new(0, a.column - b.column);
+}
+
+static inline bool point_lte(TSPoint a, TSPoint b) {
+  return (a.row < b.row) || (a.row == b.row && a.column <= b.column);
+}
+
+static inline bool point_lt(TSPoint a, TSPoint b) {
+  return (a.row < b.row) || (a.row == b.row && a.column < b.column);
+}
+
+static inline bool point_eq(TSPoint a, TSPoint b) {
+  return a.row == b.row && a.column == b.column;
+}
+
+static inline TSPoint point_min(TSPoint a, TSPoint b) {
+  if (a.row < b.row || (a.row == b.row && a.column < b.column))
+    return a;
+  else
+    return b;
+}
+
+static inline TSPoint point_max(TSPoint a, TSPoint b) {
+  if (a.row > b.row || (a.row == b.row && a.column > b.column))
+    return a;
+  else
+    return b;
+}
+
+#endif