1 files changed, 68 insertions, 0 deletions
diff --git a/src/nvim/api/private/validate.h b/src/nvim/api/private/validate.h
new file mode 100644
index 0000000000..4a1b99408e
--- /dev/null
+++ b/src/nvim/api/private/validate.h
@@ -0,0 +1,68 @@
+#ifndef NVIM_API_PRIVATE_VALIDATE_H
+#define NVIM_API_PRIVATE_VALIDATE_H
+
+#include "nvim/api/private/defs.h"
+#include "nvim/api/private/helpers.h"
+
+#define VALIDATE_INT(cond, name, val_, code) \
+  do { \
+    if (!(cond)) { \
+      api_set_error(err, kErrorTypeValidation, "Invalid " name ": %" PRId64, val_); \
+      code; \
+    } \
+  } while (0)
+
+#define VALIDATE_S(cond, name, val_, code) \
+  do { \
+    if (!(cond)) { \
+      if (strequal(val_, "")) { \
+        api_set_error(err, kErrorTypeValidation, "Invalid " name); \
+      } else { \
+        api_set_error(err, kErrorTypeValidation, "Invalid " name ": '%s'", val_); \
+      } \
+      code; \
+    } \
+  } while (0)
+
+#define VALIDATE_EXP(cond, name, expected, actual, code) \
+  do { \
+    if (!(cond)) { \
+      api_set_error(err, kErrorTypeValidation, "Invalid %s: expected %s, got %s", \
+                    name, expected, actual); \
+      code; \
+    } \
+  } while (0)
+
+#define VALIDATE_T(name, expected_t, actual_t, code) \
+  do { \
+    if (expected_t != actual_t) { \
+      api_set_error(err, kErrorTypeValidation, "Invalid %s: expected %s, got %s", \
+                    name, api_typename(expected_t), api_typename(actual_t)); \
+      code; \
+    } \
+  } while (0)
+
+#define VALIDATE(cond, fmt_, fmt_arg1, code) \
+  do { \
+    if (!(cond)) { \
+      api_set_error(err, kErrorTypeValidation, fmt_, fmt_arg1); \
+      code; \
+    } \
+  } while (0)
+
+#define VALIDATE_RANGE(cond, name, code) \
+  do { \
+    if (!(cond)) { \
+      api_set_error(err, kErrorTypeValidation, "Invalid '%s': out of range", name); \
+      code; \
+    } \
+  } while (0)
+
+#define VALIDATE_R(cond, name, code) \
+  VALIDATE(cond, "Required: '%s'", name, code);
+
+#ifdef INCLUDE_GENERATED_DECLARATIONS
+# include "api/private/validate.h.generated.h"
+#endif
+
+#endif  // NVIM_API_PRIVATE_VALIDATE_H