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+/* as.h - global header file
+   Copyright (C) 1987, 1990, 1991 Free Software Foundation, Inc.
+
+This file is part of GAS, the GNU Assembler.
+
+GAS is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GAS is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GAS; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* static const char rcsid[] = "$Id$"; */
+
+#define GAS 1
+
+#include "host.h"
+#include "flonum.h"
+
+#ifndef __STDC__
+#define	volatile	/**/
+#ifndef const
+#define	const		/**/
+#endif /* const */
+#endif /* __STDC__ */
+
+#ifdef __GNUC__
+#define alloca __builtin_alloca
+#define register
+#endif /* __GNUC__ */
+
+#ifndef __LINE__
+#define __LINE__ "unknown"
+#endif /* __LINE__ */
+
+#ifndef __FILE__
+#define __FILE__ "unknown"
+#endif /* __FILE__ */
+
+/*
+ * I think this stuff is largely out of date.  xoxorich.
+ *
+ * CAPITALISED names are #defined.
+ * "lowercaseH" is #defined if "lowercase.h" has been #include-d.
+ * "lowercaseT" is a typedef of "lowercase" objects.
+ * "lowercaseP" is type "pointer to object of type 'lowercase'".
+ * "lowercaseS" is typedef struct ... lowercaseS.
+ *
+ * #define DEBUG to enable all the "know" assertion tests.
+ * #define SUSPECT when debugging.
+ * #define COMMON as "extern" for all modules except one, where you #define
+ *	COMMON as "".
+ * If TEST is #defined, then we are testing a module: #define COMMON as "".
+ */
+
+/* These #defines are for parameters of entire assembler. */
+
+/* #define SUSPECT JF remove for speed testing */
+/* These #includes are for type definitions etc. */
+
+#include <stdio.h>
+#include <assert.h>
+
+#define obstack_chunk_alloc	xmalloc
+#define obstack_chunk_free	xfree
+
+#define BAD_CASE(value)							\
+{									\
+  as_fatal("Case value %d unexpected at line %d of file \"%s\"\n",	\
+	   value, __LINE__, __FILE__);					\
+}
+
+
+/* These are assembler-wide concepts */
+
+
+#ifndef COMMON
+#ifdef TEST
+#define COMMON			/* declare our COMMONs storage here. */
+#else
+#define COMMON extern		/* our commons live elswhere */
+#endif
+#endif
+				/* COMMON now defined */
+#define DEBUG /* temporary */
+
+#ifdef DEBUG
+#undef NDEBUG
+#define know(p) assert(p)	/* Verify our assumptions! */
+#else
+#define know(p)			/* know() checks are no-op.ed */
+#endif
+
+
+#define xfree free
+
+/* input_scrub.c */
+
+/*
+ * Supplies sanitised buffers to read.c.
+ * Also understands printing line-number part of error messages.
+ */
+
+
+/* subsegs.c     Sub-segments. Also, segment(=expression type)s.*/
+
+/*
+ * This table describes the use of segments as EXPRESSION types.
+ *
+ *	X_seg	X_add_symbol  X_subtract_symbol	X_add_number
+ * SEG_ABSENT						no (legal) expression
+ * SEG_PASS1						no (defined) "
+ * SEG_BIG					*	> 32 bits const.
+ * SEG_ABSOLUTE				     	0
+ * SEG_DATA		*		     	0
+ * SEG_TEXT		*			0
+ * SEG_BSS		*			0
+ * SEG_UNKNOWN		*			0
+ * SEG_DIFFERENCE	0		*	0
+ * SEG_REGISTER					*
+ *
+ * The blank fields MUST be 0, and are nugatory.
+ * The '0' fields MAY be 0. The '*' fields MAY NOT be 0.
+ *
+ * SEG_BIG: X_add_number is < 0 if the result is in
+ *	generic_floating_point_number.  The value is -'c' where c is the
+ *	character that introduced the constant.  e.g. "0f6.9" will have  -'f'
+ *	as a X_add_number value.
+ *	X_add_number > 0 is a count of how many littlenums it took to
+ *	represent a bignum.
+ * SEG_DIFFERENCE:
+ * If segments of both symbols are known, they are the same segment.
+ * X_add_symbol != X_sub_symbol (then we just cancel them, => SEG_ABSOLUTE).
+ */
+
+typedef enum {
+	SEG_ABSOLUTE = 0,
+	SEG_TEXT,
+	SEG_DATA,
+	SEG_BSS,
+	SEG_UNKNOWN,
+	SEG_ABSENT,		/* Mythical Segment (absent): NO expression seen. */
+	SEG_PASS1,		/* Mythical Segment: Need another pass. */
+	SEG_GOOF,		/* Only happens if AS has a logic error. */
+				/* Invented so we don't crash printing */
+				/* error message involving weird segment. */
+	SEG_BIG,		/* Bigger than 32 bits constant. */
+	SEG_DIFFERENCE,		/* Mythical Segment: absolute difference. */
+	SEG_DEBUG,		/* Debug segment */
+	SEG_NTV,		/* Transfert vector preload segment */
+	SEG_PTV,		/* Transfert vector postload segment */
+	SEG_REGISTER,		/* Mythical: a register-valued expression */
+} segT;
+
+#define SEG_MAXIMUM_ORDINAL (SEG_REGISTER)
+
+typedef int subsegT;
+
+COMMON subsegT			now_subseg;
+				/* What subseg we are accreting now? */
+
+
+COMMON segT			now_seg;
+				/* Segment our instructions emit to. */
+				/* Only OK values are SEG_TEXT or SEG_DATA. */
+
+
+extern char *const seg_name[];
+extern int section_alignment[];
+
+
+/* relax() */
+
+typedef enum
+{
+	rs_fill,		/* Variable chars to be repeated fr_offset */
+				/* times. Fr_symbol unused. */
+				/* Used with fr_offset == 0 for a constant */
+				/* length frag. */
+
+	rs_align,		/* Align: Fr_offset: power of 2. */
+				/* 1 variable char: fill character. */
+	rs_org,			/* Org: Fr_offset, fr_symbol: address. */
+				/* 1 variable char: fill character. */
+
+	rs_machine_dependent,
+#ifndef WORKING_DOT_WORD
+	rs_broken_word,		/* JF: gunpoint */
+#endif
+}
+relax_stateT;
+
+/* typedef unsigned char relax_substateT; */
+/* JF this is more likely to leave the end of a struct frag on an align
+   boundry.  Be very careful with this.  */
+typedef unsigned long relax_substateT;
+
+typedef unsigned long relax_addressT;/* Enough bits for address. */
+				/* Still an integer type. */
+
+
+/* frags.c */
+
+/*
+ * A code fragment (frag) is some known number of chars, followed by some
+ * unknown number of chars. Typically the unknown number of chars is an
+ * instruction address whose size is yet unknown. We always know the greatest
+ * possible size the unknown number of chars may become, and reserve that
+ * much room at the end of the frag.
+ * Once created, frags do not change address during assembly.
+ * We chain the frags in (a) forward-linked list(s). The object-file address
+ * of the 1st char of a frag is generally not known until after relax().
+ * Many things at assembly time describe an address by {object-file-address
+ * of a particular frag}+offset.
+
+ BUG: it may be smarter to have a single pointer off to various different
+notes for different frag kinds. See how code pans 
+ */
+struct frag			/* a code fragment */
+{
+	unsigned long fr_address; /* Object file address. */
+	struct frag *fr_next;	/* Chain forward; ascending address order. */
+				/* Rooted in frch_root. */
+
+	long fr_fix;	/* (Fixed) number of chars we know we have. */
+				/* May be 0. */
+	long fr_var;	/* (Variable) number of chars after above. */
+				/* May be 0. */
+	struct symbol *fr_symbol; /* For variable-length tail. */
+	long fr_offset;	/* For variable-length tail. */
+	char	*fr_opcode;	/*->opcode low addr byte,for relax()ation*/
+	relax_stateT fr_type;   /* What state is my tail in? */
+	relax_substateT	fr_subtype;
+		/* These are needed only on the NS32K machines */
+	char	fr_pcrel_adjust;
+	char	fr_bsr;
+	char	fr_literal [1];	/* Chars begin here. */
+				/* One day we will compile fr_literal[0]. */
+};
+#define SIZEOF_STRUCT_FRAG \
+ ((int)zero_address_frag.fr_literal-(int)&zero_address_frag)
+				/* We want to say fr_literal[0] above. */
+
+typedef struct frag fragS;
+
+COMMON fragS *	frag_now;	/* -> current frag we are building. */
+				/* This frag is incomplete. */
+				/* It is, however, included in frchain_now. */
+				/* Frag_now->fr_fix is bogus. Use: */
+/* Virtual frag_now->fr_fix==obstack_next_free(&frags)-frag_now->fr_literal.*/
+
+COMMON fragS zero_address_frag;	/* For foreign-segment symbol fixups. */
+COMMON fragS  bss_address_frag;	/* For local common (N_BSS segment) fixups. */
+
+/* main program "as.c" (command arguments etc) */
+
+COMMON char
+flagseen[128];			/* ['x'] TRUE if "-x" seen. */
+
+COMMON char *
+out_file_name;			/* name of emitted object file */
+
+COMMON int	need_pass_2;	/* TRUE if we need a second pass. */
+
+typedef struct {
+  char *	poc_name;	/* assembler mnemonic, lower case, no '.' */
+  void		(*poc_handler)();	/* Do the work */
+  int		poc_val;	/* Value to pass to handler */
+} pseudo_typeS;
+
+#if defined(__STDC__) & !defined(NO_STDARG)
+
+int had_errors(void);
+int had_warnings(void);
+void as_bad(const char *Format, ...);
+void as_fatal(const char *Format, ...);
+void as_tsktsk(const char *Format, ...);
+void as_warn(const char *Format, ...);
+
+#else
+
+int had_errors();
+int had_warnings();
+void as_bad();
+void as_fatal();
+void as_tsktsk();
+void as_warn();
+
+#endif /* __STDC__ & !NO_STDARG */
+
+#ifdef __STDC__
+
+char *app_push(void);
+char *atof_ieee(char *str, int what_kind, LITTLENUM_TYPE *words);
+char *input_scrub_include_file(char *filename, char *position);
+char *input_scrub_new_file(char *filename);
+char *input_scrub_next_buffer(char **bufp);
+char *strstr(const char *s, const char *wanted);
+char *xmalloc(int size);
+char *xrealloc(char *ptr, long n);
+int do_scrub_next_char(int (*get)(), void (*unget)());
+int gen_to_words(LITTLENUM_TYPE *words, int precision, long exponent_bits);
+int had_err(void);
+int had_errors(void);
+int had_warnings(void);
+int ignore_input(void);
+int scrub_from_file(void);
+int scrub_from_file(void);
+int scrub_from_string(void);
+int seen_at_least_1_file(void);
+void app_pop(char *arg);
+void as_howmuch(FILE *stream);
+void as_perror(char *gripe, char *filename);
+void as_where(void);
+void bump_line_counters(void);
+void do_scrub_begin(void);
+void input_scrub_begin(void);
+void input_scrub_close(void);
+void input_scrub_end(void);
+void int_to_gen(long x);
+void new_logical_line(char *fname, int line_number);
+void scrub_to_file(int ch);
+void scrub_to_string(int ch);
+void subseg_change(segT seg, int subseg);
+void subseg_new(segT seg, subsegT subseg);
+void subsegs_begin(void);
+
+#else /* __STDC__ */
+
+char *app_push();
+char *atof_ieee();
+char *input_scrub_include_file();
+char *input_scrub_new_file();
+char *input_scrub_next_buffer();
+char *strstr();
+char *xmalloc();
+char *xrealloc();
+int do_scrub_next_char();
+int gen_to_words();
+int had_err();
+int had_errors();
+int had_warnings();
+int ignore_input();
+int scrub_from_file();
+int scrub_from_file();
+int scrub_from_string();
+int seen_at_least_1_file();
+void app_pop();
+void as_howmuch();
+void as_perror();
+void as_where();
+void bump_line_counters();
+void do_scrub_begin();
+void input_scrub_begin();
+void input_scrub_close();
+void input_scrub_end();
+void int_to_gen();
+void new_logical_line();
+void scrub_to_file();
+void scrub_to_string();
+void subseg_change();
+void subseg_new();
+void subsegs_begin();
+
+#endif /* __STDC__ */
+
+ /* this one starts the chain of target dependant headers */
+#include "targ-env.h"
+
+ /* these define types needed by the interfaces */
+#include "struc-symbol.h"
+#include "reloc.h"
+#include "write.h"
+#include "expr.h"
+#include "frags.h"
+#include "hash.h"
+#include "read.h"
+#include "symbols.h"
+
+#include "tc.h"
+#include "obj.h"
+
+/*
+ * Local Variables:
+ * comment-column: 0
+ * fill-column: 131
+ * End:
+ */
+
+/* end: as.h */