text: /* ----------------------------------------------------------------------- *
   *   
   *   Copyright 1996-2018 The NASM Authors - All Rights Reserved
   *   See the file AUTHORS included with the NASM distribution for
   *   the specific copyright holders.
   *
   *   Redistribution and use in source and binary forms, with or without
   *   modification, are permitted provided that the following
   *   conditions are met:
   *
   *   * Redistributions of source code must retain the above copyright
   *     notice, this list of conditions and the following disclaimer.
   *   * Redistributions in binary form must reproduce the above
   *     copyright notice, this list of conditions and the following
   *     disclaimer in the documentation and/or other materials provided
   *     with the distribution.
   *     
   *     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   *     INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
   *     MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   *     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   *     CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   *     NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   *     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   *     HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   *     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
   *     OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
   *     EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   * ----------------------------------------------------------------------- */
  
  /* 
   * labels.h  header file for labels.c
   */
  
  #ifndef LABELS_H
  #define LABELS_H
  
  #include "compiler.h"
  
  enum mangle_index {
      LM_LPREFIX,                 /* Local variable prefix */
      LM_LSUFFIX,                 /* Local variable suffix */
      LM_GPREFIX,                 /* Global variable prefix */
      LM_GSUFFIX                  /* GLobal variable suffix */
  };
  
  enum label_type {
      LBL_none = -1,              /* No label */
      LBL_LOCAL = 0,              /* Must be zero */
      LBL_STATIC,
      LBL_GLOBAL,
      LBL_EXTERN,
      LBL_REQUIRED,               /* Like extern but emit even if unused */
      LBL_COMMON,
      LBL_SPECIAL,                /* Magic symbols like ..start */
      LBL_BACKEND                 /* Backend-defined symbols like ..got */
  };
  
  enum label_type lookup_label(const char *label, int32_t *segment, int64_t *offset);
  static inline bool is_extern(enum label_type type)
  {
      return type == LBL_EXTERN || type == LBL_REQUIRED;
  }
  void define_label(const char *label, int32_t segment, int64_t offset,
                    bool normal);
  void backend_label(const char *label, int32_t segment, int64_t offset);
  bool declare_label(const char *label, enum label_type type,
                     const char *special);
  void set_label_mangle(enum mangle_index which, const char *what);
  int init_labels(void);
  void cleanup_labels(void);
  const char *local_scope(const char *label);
  
  extern uint64_t global_offset_changed;
  
  #endif /* LABELS_H */
  