1 files changed, 77 insertions, 0 deletions
diff --git a/src/ragel/fspec.h b/src/ragel/fspec.h
new file mode 100644
index 0000000..68998f4
--- /dev/null
+++ b/src/ragel/fspec.h
@@ -0,0 +1,77 @@
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+#include <stdbool.h>
+
+struct fspec_bytes {
+   const uint8_t *data;
+   size_t size;
+};
+
+enum fspec_kind_bits {
+   FSPEC_KIND_IGNORE = 1<<0,
+   FSPEC_KIND_HEXADECIMAL = 1<<1,
+   FSPEC_KIND_ENCODING = 1<<2,
+};
+
+struct fspec_kind {
+   const char *name;
+   uint32_t flags;
+};
+
+enum fspec_array_type {
+   FSPEC_ARRAY_FIXED,
+   FSPEC_ARRAY_MATCH,
+   FSPEC_ARRAY_VAR,
+};
+
+struct fspec_array {
+   enum fspec_array_type type;
+
+   union {
+      struct fspec_bytes match;
+      const char *var;
+      size_t nmemb;
+   };
+};
+
+enum fspec_type_bits {
+   FSPEC_TYPE_SIGNED = 1<<0,
+   FSPEC_TYPE_CONTAINER = 1<<1,
+};
+
+struct fspec_type {
+   const char *name;
+   size_t size;
+   uint32_t flags;
+};
+
+struct fspec_field {
+   struct fspec_type type;
+   struct fspec_array array;
+   struct fspec_kind kind;
+   const char *name;
+};
+
+struct fspec_container {
+   const char *name;
+};
+
+struct fspec;
+struct fspec {
+   struct {
+      void (*field)(struct fspec *fspec, const struct fspec_container *container, const struct fspec_field *field);
+      size_t (*read)(struct fspec *fspec, char *buf, const size_t size, const size_t nmemb);
+   } ops;
+
+   struct {
+      // XXX: replace with ops.alloc, ops.free
+      //      on dump.c we can then just provide implementation that still uses reasonable amount of static memory
+      //      but we don't limit the code from working  with regular dynamic memory
+      uint8_t *data;
+      size_t size;
+   } mem;
+};
+
+void fspec_parse(struct fspec *fspec);