1 files changed, 92 insertions, 0 deletions
diff --git a/src/map/magic-expr.h b/src/map/magic-expr.h
new file mode 100644
index 0000000..5f58d3c
--- /dev/null
+++ b/src/map/magic-expr.h
@@ -0,0 +1,92 @@
+#ifndef MAGIC_EXPR_H_
+#define MAGIC_EXPR_H_
+#include "magic-interpreter.h"
+#include "magic-interpreter-aux.h"
+
+#ifndef MAX
+#  define MAX(x,y) (((x)>(y)) ? (x) : (y))
+#endif
+#ifndef MIN
+#  define MIN(x,y) (((x)<(y)) ? (x) : (y))
+#endif
+
+#ifndef INT_MAX
+#  define INT_MAX (1<<30) // It's more than that, but this is quite sufficient for our purposes.
+#endif
+
+/*
+ * Argument types:
+ *  i : int
+ *  d : dir
+ *  s : string
+ *  e : entity
+ *  l : location
+ *  a : area
+ *  S : spell
+ *  I : invocation
+ *  . : any, except for fail/undef
+ *  _ : any, including fail, but not undef
+ */
+typedef struct fun {
+        char *name;
+        char *signature;
+        char ret_ty;
+        int (*fun)(env_t *env, int args_nr, val_t *result, val_t *args);
+} fun_t;
+
+typedef struct op {
+        char *name;
+        char *signature;
+        int (*op)(env_t *env, int args_nr, val_t *args);
+} op_t;
+
+/**
+ * Retrieves a function by name
+ * @param name The name to look up
+ * @return A function of that name, or NULL, and a function index
+ */
+fun_t *
+magic_get_fun(char *name, int *index);
+
+/**
+ * Retrieves an operation by name
+ * @param name The name to look up
+ * @return An operation of that name, or NULL, and a function index
+ */
+op_t *
+magic_get_op(char *name, int *index);
+
+/**
+ * Evaluates an expression and stores the result in `dest'
+ */
+void
+magic_eval(env_t *env, val_t *dest, expr_t *expr);
+
+/**
+ * Evaluates an expression and coerces the result into an integer
+ */
+int
+magic_eval_int(env_t *env, expr_t *expr);
+
+/**
+ * Evaluates an expression and coerces the result into a string
+ */
+char *
+magic_eval_str(env_t *env, expr_t *expr);
+
+int
+map_is_solid(int m, int x, int y);
+
+expr_t *
+magic_new_expr(int ty);
+
+void
+magic_clear_var(val_t *v);
+
+void
+magic_copy_var(val_t *dest, val_t *src);
+
+void
+magic_random_location(location_t *dest, area_t *area);
+
+#endif /* !defined(MAGIC_EXPR_H_) */
+\ No newline at end of file