Started binding, ran into things I don't know how to bind

src/onigmo.cr

@@ -0,0 +1,88 @@
+@[Link("onigmo")]
+
+lib Onigmo
+  type OnigOptionType = UInt32
+  type OnigCaseFoldType = UInt32
+  type OnigDistance = LibC::SizeT
+
+  struct OnigRegex
+    p : LibC::UChar*
+    used : UInt32
+    alloc : UInt32
+
+    num_mem : Int32
+    num_repeat : Int32
+    num_null_check : Int32
+    num_comb_exp_check : Int32
+    num_call : Int32
+    capture_history : UInt32
+    bt_mem_start : UInt32
+    bt_mem_end : UInt32
+    stack_pop_level : Int32
+    repeat_range_alloc : Int32
+    options : OnigOptionType
+    syntax : OnigSyntaxType*
+    name_table : Void*
+    case_fold_flag : OnigCaseFoldType
+    optimize : Int32
+    threshold_len : Int32
+    anchor : Int32
+    anchor_dmin : OnigDistance
+    anchor_dmax : OnigDistance
+    sub_anchor : Int32
+    exact : LibC::UChar*
+    exact_end : LibC::UChar*
+    map : LibC::UChar*
+    int_map : Int32*
+    int_map_backward : Int32*
+    dmin : OnigDistance
+    dmax : OnigDistance
+    chain : OnigRegex*
+  end
+
+  type OnigRegexType = OnigRegex*
+  type OnigCodePoint = UInt32
+  type OnigUChar = LibC::UChar
+  type OnigEncoding = Void*
+
+  struct OnigMetaCharTableType
+    esc : OnigCodePoint
+    anychar : OnigCodePoint
+    anytime : OnigCodePoint
+    zero_or_one_time : OnigCodePoint
+    one_or_one_time : OnigCodePoint
+    anychar_anytime : OnigCodePoint
+  end
+
+  struct OnigSyntaxType
+    op : UInt32
+    op2 : UInt32
+    behavior : UInt32
+    options : OnigOptionType
+    meta_char_table : OnigMetaCharTableType
+  end
+
+  struct OnigErrorInfo
+    enc : OnigEncoding
+    par : OnigUChar*
+    par_end : OnigUChar*
+  end
+
+  ONIG_OPTION_NONE = 0u32
+  ONIG_OPTION_DEFAULT = ONIG_OPTION_NONE
+
+
+  fun new = onig_new(OnigRegex*, OnigUChar*, OnigUChar*, OnigOptionType, OnigEncoding, OnigSyntaxType*, OnigErrorInfo*)
+end
+
+pattern = "a(.*)b|[e-f]+"
+str = "zzzzaffffffffb"
+
+einfo = Onigmo::OnigErrorInfo.new
+
+Onigmo.new(out reg, 
+pattern.to_unsafe, 
+pattern.to_unsafe + pattern.size,
+Onigmo::ONIG_OPTION_DEFAULT, 
+0, 
+Onigmo::ONIG_SYNTAX_DEFAULT, pointerof(einfo))