/* This file must be included in all the files which use the backlibrary.
 */

extern char *extnd_name(), *extnd_dnam(), *extnd_dlb(), *extnd_ilb(),
	    *extnd_hol(), *extnd_ext(), *extnd_pro(), *extnd_start(),
	    *extnd_part(), *extnd_cont();
#include <em.h>
#include "data.h"

/* These routines are called very often, thus we turned them into macros. */

#define text1(b)	{if (--text_cnt < 0) mem_text(); *text++ = b;}
#define con1(b)		{if (--data_cnt < 0) mem_data(); *data++ = b;}
#define rom1(b)		{if (--data_cnt < 0) mem_data(); *data++ = b;}
#define bss( n)		( nbss += n)

/* Macros to change interface names */

#define common		B_common
#define con2		B_con2
#define con4		B_con4
#define rom2		B_rom2
#define rom4		B_rom4
#define text2		B_txt2
#define text4		B_txt4
#define close_back	B_close_back
#define open_back	B_open_back
#define end_back	B_end_back
#define init_back	B_init_back
#define extnd_pro	B_ex_pro
#define extnd_start	B_ex_start
#define extnd_name	B_ex_name
#define extnd_dnam	B_ex_dnam
#define extnd_dlb	B_ex_dlb
#define extnd_ilb	B_ex_ilb
#define extnd_hol	B_ex_hol
#define extnd_part	B_ex_part
#define extnd_cont	B_ex_cont
#define gen1		B_gen1
#define gen2		B_gen2
#define gen4		B_gen4
#define save_label	B_save_label
#define dump_label	B_dump_label
#define align_word	B_align_word
#define reloc1		B_rlc1
#define reloc2		B_rlc2
#define reloc4		B_rlc4
#define set_global_visible	B_stglobvis
#define set_local_visible	B_stlocvis
#define symbol_definition	B_symdef


/* Numbering of the segments and some global constants */

#define 	SEGTXT		0
#define 	SEGROM		1
#define 	SEGCON		2
#define 	SEGBSS		3
#define 	SEGHOL		-1	/* does not exist */

#define swtxt()		switchseg( SEGTXT)

#define switchseg(seg)	if ((seg) != cur_seg) B_swtchsg(seg); else

#define 	PC_REL  	1
#define 	ABSOLUTE 	!PC_REL


/* Initialize values. */

#define MAXTEXT		4096
#define MAXDATA		2048
#define	MAXRELO		512
#define	MAXNAME		512
#define	MAXSTRING	4096