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m4.h
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1996-09-28
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/* GNU m4 -- A simple macro processor
Copyright (C) 1989, 90, 91, 92, 93, 94 Free Software Foundation, Inc.
This program 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 2, or (at your option)
any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* We use <config.h> instead of "config.h" so that a compilation
using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
(which it would do because it found this file in $srcdir). */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <sys/types.h>
#if __STDC__
# define voidstar void *
#else
# define voidstar char *
#endif
#ifdef PROTOTYPES
# define _(Args) Args
#else
# define _(Args) ()
#endif
#include <stdio.h>
#include <ctype.h>
#include "obstack.h"
/* An ANSI string.h and pre-ANSI memory.h might conflict. */
#if defined (HAVE_STRING_H) || defined (STDC_HEADERS)
# include <string.h>
# if !defined (STDC_HEADERS) && defined (HAVE_MEMORY_H)
# include <memory.h>
# endif
/* This is for obstack code -- should live in obstack.h. */
# ifndef bcopy
# define bcopy(S, D, N) memcpy ((D), (S), (N))
# endif
#else
# include <strings.h>
# ifndef memcpy
# define memcpy(D, S, N) bcopy((S), (D), (N))
# endif
# ifndef strchr
# define strchr(S, C) index ((S), (C))
# endif
# ifndef strrchr
# define strrchr(S, C) rindex ((S), (C))
# endif
# ifndef bcopy
void bcopy ();
# endif
#endif
#ifdef STDC_HEADERS
# include <stdlib.h>
#else /* not STDC_HEADERS */
voidstar malloc ();
voidstar realloc ();
char *getenv ();
double atof ();
long strtol ();
#endif /* STDC_HEADERS */
/* Some systems do not define EXIT_*, even with STDC_HEADERS. */
#ifndef EXIT_SUCCESS
# define EXIT_SUCCESS 0
#endif
#ifndef EXIT_FAILURE
# define EXIT_FAILURE 1
#endif
#include <errno.h>
#ifndef errno
extern int errno;
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
/* If FALSE is defined, we presume TRUE is defined too. In this case,
merely typedef boolean as being int. Or else, define these all. */
#ifndef FALSE
/* Do not use `enum boolean': this tag is used in SVR4 <sys/types.h>. */
typedef enum { FALSE = 0, TRUE = 1 } boolean;
#else
typedef int boolean;
#endif
char *mktemp ();
/* Various declarations. */
struct string
{
char *string; /* characters of the string */
size_t length; /* length of the string */
};
typedef struct string STRING;
/* Memory allocation. */
voidstar xmalloc _((unsigned int));
voidstar xrealloc _((voidstar , unsigned int));
void xfree _((voidstar));
char *xstrdup _((const char *));
#define obstack_chunk_alloc xmalloc
#define obstack_chunk_free xfree
/* Other library routines. */
void error _((int, int, const char *, ...));
/* Those must come first. */
typedef void builtin_func ();
typedef struct token_data token_data;
/* File: m4.c --- global definitions. */
/* Option flags. */
extern int sync_output; /* -s */
extern int debug_level; /* -d */
extern int hash_table_size; /* -H */
extern int no_gnu_extensions; /* -G */
extern int prefix_all_builtins; /* -P */
extern int max_debug_argument_length; /* -l */
extern int suppress_warnings; /* -Q */
extern int warning_status; /* -E */
extern int nesting_limit; /* -L */
#ifdef ENABLE_CHANGEWORD
extern const char *user_word_regexp; /* -W */
#endif
/* Error handling. */
#define M4ERROR(Arglist) \
(reference_error (), error Arglist)
void reference_error _((void));
#ifdef USE_STACKOVF
void setup_stackovf_trap _((char *const *, char *const *,
void (*handler) (void)));
#endif
/* File: debug.c --- debugging and tracing function. */
extern FILE *debug;
/* The value of debug_level is a bitmask of the following. */
/* a: show arglist in trace output */
#define DEBUG_TRACE_ARGS 1
/* e: show expansion in trace output */
#define DEBUG_TRACE_EXPANSION 2
/* q: quote args and expansion in trace output */
#define DEBUG_TRACE_QUOTE 4
/* t: trace all macros -- overrides trace{on,off} */
#define DEBUG_TRACE_ALL 8
/* l: add line numbers to trace output */
#define DEBUG_TRACE_LINE 16
/* f: add file name to trace output */
#define DEBUG_TRACE_FILE 32
/* p: trace path search of include files */
#define DEBUG_TRACE_PATH 64
/* c: show macro call before args collection */
#define DEBUG_TRACE_CALL 128
/* i: trace changes of input files */
#define DEBUG_TRACE_INPUT 256
/* x: add call id to trace output */
#define DEBUG_TRACE_CALLID 512
/* V: very verbose -- print everything */
#define DEBUG_TRACE_VERBOSE 1023
/* default flags -- equiv: aeq */
#define DEBUG_TRACE_DEFAULT 7
#define DEBUG_PRINT1(Fmt, Arg1) \
do \
{ \
if (debug != NULL) \
fprintf (debug, Fmt, Arg1); \
} \
while (0)
#define DEBUG_PRINT3(Fmt, Arg1, Arg2, Arg3) \
do \
{ \
if (debug != NULL) \
fprintf (debug, Fmt, Arg1, Arg2, Arg3); \
} \
while (0)
#define DEBUG_MESSAGE(Fmt) \
do \
{ \
if (debug != NULL) \
{ \
debug_message_prefix (); \
fprintf (debug, Fmt); \
putc ('\n', debug); \
} \
} \
while (0)
#define DEBUG_MESSAGE1(Fmt, Arg1) \
do \
{ \
if (debug != NULL) \
{ \
debug_message_prefix (); \
fprintf (debug, Fmt, Arg1); \
putc ('\n', debug); \
} \
} \
while (0)
#define DEBUG_MESSAGE2(Fmt, Arg1, Arg2) \
do \
{ \
if (debug != NULL) \
{ \
debug_message_prefix (); \
fprintf (debug, Fmt, Arg1, Arg2); \
putc ('\n', debug); \
} \
} \
while (0)
void debug_init _((void));
int debug_decode _((const char *));
void debug_flush_files _((void));
boolean debug_set_output _((const char *));
void debug_message_prefix _((void));
void trace_prepre _((const char *, int));
void trace_pre _((const char *, int, int, token_data **));
void trace_post _((const char *, int, int, token_data **, const char *));
/* File: input.c --- lexical definitions. */
/* Various different token types. */
enum token_type
{
TOKEN_EOF, /* end of file */
TOKEN_STRING, /* a quoted string */
TOKEN_WORD, /* an identifier */
TOKEN_SIMPLE, /* a single character */
TOKEN_MACDEF /* a macros definition (see "defn") */
};
/* The data for a token, a macro argument, and a macro definition. */
enum token_data_type
{
TOKEN_VOID,
TOKEN_TEXT,
TOKEN_FUNC
};
struct token_data
{
enum token_data_type type;
union
{
struct
{
char *text;
#ifdef ENABLE_CHANGEWORD
char *original_text;
#endif
}
u_t;
struct
{
builtin_func *func;
boolean traced;
}
u_f;
}
u;
};
#define TOKEN_DATA_TYPE(Td) ((Td)->type)
#define TOKEN_DATA_TEXT(Td) ((Td)->u.u_t.text)
#ifdef ENABLE_CHANGEWORD
# define TOKEN_DATA_ORIG_TEXT(Td) ((Td)->u.u_t.original_text)
#endif
#define TOKEN_DATA_FUNC(Td) ((Td)->u.u_f.func)
#define TOKEN_DATA_FUNC_TRACED(Td) ((Td)->u.u_f.traced)
typedef enum token_type token_type;
typedef enum token_data_type token_data_type;
void input_init _((void));
int peek_input _((void));
token_type next_token _((token_data *));
void skip_line _((void));
/* push back input */
void push_file _((FILE *, const char *));
void push_macro _((builtin_func *, boolean));
struct obstack *push_string_init _((void));
const char *push_string_finish _((void));
void push_wrapup _((const char *));
boolean pop_wrapup _((void));
/* current input file, and line */
extern const char *current_file;
extern int current_line;
/* left and right quote, begin and end comment */
extern STRING bcomm, ecomm;
extern STRING lquote, rquote;
#define DEF_LQUOTE "`"
#define DEF_RQUOTE "\'"
#define DEF_BCOMM "#"
#define DEF_ECOMM "\n"
void set_quotes _((const char *, const char *));
void set_comment _((const char *, const char *));
#ifdef ENABLE_CHANGEWORD
void set_word_regexp _((const char *));
#endif
/* File: output.c --- output functions. */
extern int current_diversion;
extern int output_current_line;
void output_init _((void));
void shipout_text _((struct obstack *, const char *, int));
void make_diversion _((int));
void insert_diversion _((int));
void insert_file _((FILE *));
void freeze_diversions _((FILE *));
/* File symtab.c --- symbol table definitions. */
/* Operation modes for lookup_symbol (). */
enum symbol_lookup
{
SYMBOL_LOOKUP,
SYMBOL_INSERT,
SYMBOL_DELETE,
SYMBOL_PUSHDEF,
SYMBOL_POPDEF
};
/* Symbol table entry. */
struct symbol
{
struct symbol *next;
boolean traced;
boolean shadowed;
boolean macro_args;
boolean blind_no_args;
char *name;
token_data data;
};
#define SYMBOL_NEXT(S) ((S)->next)
#define SYMBOL_TRACED(S) ((S)->traced)
#define SYMBOL_SHADOWED(S) ((S)->shadowed)
#define SYMBOL_MACRO_ARGS(S) ((S)->macro_args)
#define SYMBOL_BLIND_NO_ARGS(S) ((S)->blind_no_args)
#define SYMBOL_NAME(S) ((S)->name)
#define SYMBOL_TYPE(S) (TOKEN_DATA_TYPE (&(S)->data))
#define SYMBOL_TEXT(S) (TOKEN_DATA_TEXT (&(S)->data))
#define SYMBOL_FUNC(S) (TOKEN_DATA_FUNC (&(S)->data))
typedef enum symbol_lookup symbol_lookup;
typedef struct symbol symbol;
typedef void hack_symbol ();
#define HASHMAX 509 /* default, overridden by -Hsize */
extern symbol **symtab;
void symtab_init _((void));
symbol *lookup_symbol _((const char *, symbol_lookup));
void hack_all_symbols _((hack_symbol *, const char *));
/* File: macro.c --- macro expansion. */
void expand_input _((void));
void call_macro _((symbol *, int, token_data **, struct obstack *));
/* File: builtin.c --- builtins. */
struct builtin
{
const char *name;
boolean gnu_extension;
boolean groks_macro_args;
boolean blind_if_no_args;
builtin_func *func;
};
struct predefined
{
const char *unix_name;
const char *gnu_name;
const char *func;
};
typedef struct builtin builtin;
typedef struct predefined predefined;
void builtin_init _((void));
void define_builtin _((const char *, const builtin *, symbol_lookup, boolean));
void define_user_macro _((const char *, const char *, symbol_lookup));
void undivert_all _((void));
void expand_user_macro _((struct obstack *, symbol *, int, token_data **));
const builtin *find_builtin_by_addr _((builtin_func *));
const builtin *find_builtin_by_name _((const char *));
/* File: path.c --- path search for include files. */
void include_init _((void));
void include_env_init _((void));
void add_include_directory _((const char *));
FILE *path_search _((const char *));
/* File: eval.c --- expression evaluation. */
/* eval_t and unsigned_eval_t should be at least 32 bits. */
typedef int eval_t;
typedef unsigned int unsigned_eval_t;
boolean evaluate _((const char *, eval_t *));
/* File: format.c --- printf like formatting. */
void format _((struct obstack *, int, token_data **));
/* File: freeze.c --- frozen state files. */
void produce_frozen_state _((const char *));
void reload_frozen_state _((const char *));
/* Debugging the memory allocator. */
#ifdef WITH_DMALLOC
# define DMALLOC_FUNC_CHECK
# include <dmalloc.h>
#endif
/* Other debug stuff. */
#ifdef DEBUG
# define DEBUG_INPUT
# define DEBUG_MACRO
# define DEBUG_SYM
# define DEBUG_INCL
#endif