* This code is derived from software copyrighted by the Free Software
* Modified 1991 by Donn Seeley at UUNET Technologies, Inc.
static char sccsid
[] = "@(#)cpp.c 6.3 (Berkeley) 5/8/91";
/* C Compatible Compiler Preprocessor (CCCP)
Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
Written by Paul Rubin, June 1986
Adapted to ANSI C, Richard Stallman, Jan 1987
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 1, or (at your option) any
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, 675 Mass Ave, Cambridge, MA 02139, USA.
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding! */
typedef unsigned char U_CHAR
;
#include "../src/config.h"
/* In case config.h defines these. */
#include <sys/time.h> /* for __DATE__ and __TIME__ */
#include <sys/resource.h>
/* VMS-specific definitions */
#include <errno.h> /* This defines "errno" properly */
#include <perror.h> /* This defines sys_errlist/sys_nerr properly */
#define O_RDONLY 0 /* Open arg for Read/Only */
#define O_WRONLY 1 /* Open arg for Write/Only */
#define read(fd,buf,size) VAX11_C_read(fd,buf,size)
#define write(fd,buf,size) VAX11_C_write(fd,buf,size)
#define BSTRING /* VMS/GCC supplies the bstring routines */
#define max(a,b) ((a) > (b) ? (a) : (b))
#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
/* External declarations. */
extern char *version_string
;
/* Forward declarations. */
int do_define (), do_line (), do_include (), do_undef (), do_error (),
do_pragma (), do_if (), do_xifdef (), do_else (),
do_elif (), do_endif (), do_sccs (), do_once ();
struct hashnode
*install ();
struct hashnode
*lookup ();
char *xmalloc (), *xrealloc (), *xcalloc (), *savestring ();
void fatal (), fancy_abort (), pfatal_with_name (), perror_with_name ();
void conditional_skip ();
void output_line_command ();
/* Last arg to output_line_command. */
enum file_change_code
{same_file
, enter_file
, leave_file
};
U_CHAR
*skip_to_end_of_comment ();U_CHAR
*skip_quoted_string ();#define FATAL_EXIT_CODE 33 /* gnu cc command understands this */
#ifndef SUCCESS_EXIT_CODE
#define SUCCESS_EXIT_CODE 0 /* 0 means success on Unix. */
/* Name under which this program was invoked. */
/* Nonzero means handle C++ comment syntax and use
extra default include directories for C++. */
/* Current maximum length of directory names in the search path
for include files. (Altered as we get more of them.) */
/* Nonzero means copy comments into the output file. */
int put_out_comments
= 0;
/* Nonzero means don't process the ANSI trigraph sequences. */
/* Nonzero means print the names of included files rather than
the preprocessed output. 1 means just the #include "...",
2 means #include <...> as well. */
/* Nonzero means don't output line number information. */
/* Nonzero means inhibit output of the preprocessed text
and instead output the definitions of all user-defined macros
in a form suitable for use as input to cccp. */
/* Nonzero means give all the error messages the ANSI standard requires. */
/* Nonzero means don't print warning messages. -w. */
int inhibit_warnings
= 0;
/* Nonzero means warn if slash-star appears in a comment. */
/* Nonzero means warn if there are any trigraphs. */
/* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
/* Nonzero causes output not to be done,
but directives such as #define that have side effects
The `fname' field is nonzero for source files and #include files
and for the dummy text used for -D and -U.
It is zero for rescanning results of macro expansion
and for expanding macro arguments. */
#define INPUT_STACK_MAX 200
/* Macro that this level is the expansion of.
Included so that we can reenable the macro
at the end of this level. */
/* Value of if_stack at start of this file.
Used to prohibit unmatched #endif (etc) in an include file. */
struct if_stack
*if_stack
;
/* Object to be freed at end of input at this level. */
} instack
[INPUT_STACK_MAX
];
/* Current nesting level of input sources.
`instack[indepth]' is the level currently being read. */
#define CHECK_DEPTH(code) \
if (indepth >= (INPUT_STACK_MAX - 1)) \
error_with_line (line_for_error (instack[indepth].lineno), \
"macro or #include recursion too deep"); \
/* Current depth in #include directives that use <...>. */
int system_include_depth
= 0;
typedef struct file_buf FILE_BUF
;
/* The output buffer. Its LENGTH field is the amount of room allocated
for the buffer, not the number of chars actually present. To get
that, subtract outbuf.buf from outbuf.bufp. */
#define OUTBUF_SIZE 10 /* initial size of output buffer */
/* Grow output buffer OBUF points at
so it can hold at least NEEDED more chars. */
#define check_expand(OBUF, NEEDED) \
(((OBUF)->length - ((OBUF)->bufp - (OBUF)->buf) <= (NEEDED)) \
? grow_outbuf ((OBUF), (NEEDED)) : 0)
struct file_name_list
*next
;
/* #include "file" looks in source file dir, then stack. */
/* #include <file> just looks in the stack. */
/* -I directories are added to the end, then the defaults are added. */
struct file_name_list include_defaults
[] =
{ &include_defaults
[1], GCC_INCLUDE_DIR
},
{ &include_defaults
[2], "/usr/include" },
{ 0, "/usr/local/include" }
{ &include_defaults
[1], "GNU_CC_INCLUDE:" }, /* GNU includes */
{ &include_defaults
[2], "SYS$SYSROOT:[SYSLIB.]" }, /* VAX-11 "C" includes */
{ 0, "" }, /* This makes normal VMS filespecs work OK */
/* These are used instead of the above, for C++. */
struct file_name_list cplusplus_include_defaults
[] =
/* Pick up GNU C++ specific include files. */
{ &cplusplus_include_defaults
[1], GPLUSPLUS_INCLUDE_DIR
},
/* Use GNU CC specific header files. */
{ &cplusplus_include_defaults
[2], GCC_INCLUDE_DIR
},
{ &cplusplus_include_defaults
[1], "GNU_GXX_INCLUDE:" },
{ &cplusplus_include_defaults
[2], "GNU_CC_INCLUDE:" },
{ &cplusplus_include_defaults
[3], "SYS$SYSROOT:[SYSLIB.]" },
{ 0, "" }, /* This makes normal VMS filespecs work OK */
struct file_name_list
*include
= 0; /* First dir to search */
/* First dir to search for <file> */
struct file_name_list
*first_bracket_include
= 0;
struct file_name_list
*last_include
= 0; /* Last in chain */
/* List of included files that contained #once. */
struct file_name_list
*dont_repeat_files
= 0;
/* List of other included files. */
struct file_name_list
*all_include_files
= 0;
/* Structure allocated for every #define. For a simple replacement
nargs = -1, the `pattern' list is null, and the expansion is just
the replacement text. Nargs = 0 means a functionlike macro with no args,
#define getchar() getc (stdin) .
When there are args, the expansion is the replacement text with the
args squashed out, and the reflist is a list describing how to
build the output from the input: e.g., "3 chars, then the 1st arg,
then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg".
The chars here come from the expansion. Whatever is left of the
expansion after the last arg-occurrence is copied after that arg.
Note that the reflist can be arbitrarily long---
its length depends on the number of times the arguments appear in
the replacement text, not how many args there are. Example:
#define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and
{ (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL }
where (x, y) means (nchars, argno). */
typedef struct definition DEFINITION
;
int length
; /* length of expansion string */
char stringify
; /* nonzero if this arg was preceded by a
char raw_before
; /* Nonzero if a ## operator before arg. */
char raw_after
; /* Nonzero if a ## operator after arg. */
int nchars
; /* Number of literal chars to copy before
int argno
; /* Number of arg to substitute (origin-0) */
/* Names of macro args, concatenated in reverse order
with comma-space between them.
The only use of this is that we warn on redefinition
if this differs between the old and new definitions. */
/* different kinds of things that can appear in the value field
of a hash node. Actually, this may be useless now. */
/* The structure of a node in the hash table. The hash table
has entries for all tokens defined by #define commands (type T_MACRO),
plus some special tokens like __LINE__ (these each have their own
type, and the appropriate code is run when that type of node is seen.
It does not contain control words like "#define", which are recognized
by a separate piece of code. */
/* different flavors of hash nodes --- also used in keyword table */
T_DEFINE
= 1, /* the `#define' keyword */ T_INCLUDE
, /* the `#include' keyword */ T_IFDEF
, /* the `#ifdef' keyword */ T_IFNDEF
, /* the `#ifndef' keyword */ T_IF
, /* the `#if' keyword */ T_PRAGMA
, /* `#pragma' */ T_SCCS
, /* `#sccs', used on system V. */ T_IDENT
, /* `#ident', used on system V. */ T_SPECLINE
, /* special symbol `__LINE__' */ T_BASE_FILE
, /* `__BASE_FILE__' */ T_INCLUDE_LEVEL
, /* `__INCLUDE_LEVEL__' */ T_VERSION
, /* `__VERSION__' */ T_CONST
, /* Constant value, used by `__STDC__' */ T_MACRO
, /* macro defined by `#define' */ T_DISABLED
, /* macro temporarily turned off for rescan */ T_SPEC_DEFINED
, /* special `defined' macro for use in #if statements */ T_UNUSED
/* Used for something not defined. */ struct hashnode
*next
; /* double links for easy deletion */
struct hashnode
**bucket_hdr
; /* also, a back pointer to this node's hash
chain is kept, in case the node is the head
of the chain and gets deleted. */
enum node_type type
; /* type of special token */
int length
; /* length of token, for quick comparison */
U_CHAR
*name
; /* the actual name */ union hashval value
; /* pointer to expansion, or whatever */
typedef struct hashnode HASHNODE
;
/* Some definitions for the hash table. The hash function MUST be
computed as shown in hashf () below. That is because the rescan
loop computes the hash value `on the fly' for most tokens,
in order to avoid the overhead of a lot of procedure calls to
the hashf () function. Hashf () only exists for the sake of
politeness, for use when speed isn't so important. */
HASHNODE
*hashtab
[HASHSIZE
];#define HASHSTEP(old, c) ((old << 2) + c)
#define MAKE_POS(v) (v & ~0x80000000) /* make number positive */
/* Symbols to predefine. */
char *predefs
= CPP_PREDEFINES
;
/* `struct directive' defines one #-directive, including how to handle it. */
int length
; /* Length of name */
int (*func
)(); /* Function to handle directive */
char *name
; /* Name of directive */
enum node_type type
; /* Code which describes which directive. */
char angle_brackets
; /* Nonzero => <...> is special. */
char traditional_comments
; /* Nonzero: keep comments if -traditional. */
char pass_thru
; /* Copy preprocessed directive to output file. */
/* Here is the actual list of #-directives, most-often-used first. */
struct directive directive_table
[] = {
{ 6, do_define
, "define", T_DEFINE
, 0, 1},
{ 5, do_xifdef
, "ifdef", T_IFDEF
},
{ 6, do_xifdef
, "ifndef", T_IFNDEF
},
{ 5, do_endif
, "endif", T_ENDIF
},
{ 4, do_else
, "else", T_ELSE
},
{ 4, do_elif
, "elif", T_ELIF
},
{ 4, do_line
, "line", T_LINE
},
{ 7, do_include
, "include", T_INCLUDE
, 1},
{ 5, do_undef
, "undef", T_UNDEF
},
{ 5, do_error
, "error", T_ERROR
},
{ 4, do_sccs
, "sccs", T_SCCS
},
{ 6, do_pragma
, "pragma", T_PRAGMA
, 0, 0, 1},
/* table to tell if char can be part of a C identifier. */
/* table to tell if char can be first char of a c identifier. */
/* table to tell if c is horizontal space. */
U_CHAR is_hor_space
[256];/* table to tell if c is horizontal or vertical space. */
#define SKIP_WHITE_SPACE(p) do { while (is_hor_space[*p]) p++; } while (0)
#define SKIP_ALL_WHITE_SPACE(p) do { while (is_space[*p]) p++; } while (0)
int errors
= 0; /* Error counter for exit code */
/* Zero means dollar signs are punctuation.
-$ stores 0; -traditional, stores 1. Default is 1 for VMS, 0 otherwise.
This must be 0 for correct processing of this ANSI C program:
#ifndef DOLLARS_IN_IDENTIFIERS
#define DOLLARS_IN_IDENTIFIERS 0
int dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
;
FILE_BUF
expand_to_temp_buffer ();DEFINITION
*collect_expansion ();/* Stack of conditionals currently in progress
(including both successful and failing conditionals). */
struct if_stack
*next
; /* for chaining to the next stack frame */
char *fname
; /* copied from input when frame is made */
int lineno
; /* similarly */
int if_succeeded
; /* true if a leg of this if-group
has been passed through rescan */
enum node_type type
; /* type of last directive seen in this group */
typedef struct if_stack IF_STACK_FRAME
;
IF_STACK_FRAME
*if_stack
= NULL
;/* Buffer of -M output. */
/* Number of bytes allocated in above. */
/* Number of bytes used. */
/* Number of bytes since the last newline. */
/* Nonzero means -I- has been seen,
so don't look for #include "foo" the source-file directory. */
/* Handler for SIGPIPE. */
fatal ("output pipe has been closed");
char *in_fname
, *out_fname
;
char **pend_files
= (char **) xmalloc (argc
* sizeof (char *));
char **pend_defs
= (char **) xmalloc (argc
* sizeof (char *));
char **pend_undefs
= (char **) xmalloc (argc
* sizeof (char *));
int no_standard_includes
= 0;
/* Non-0 means don't output the preprocessed program. */
/* Stream on which to print the dependency information. */
/* Target-name to write with the dependency information. */
/* Get rid of any avoidable limit on stack size. */
/* Set the stack limit huge so that alloca (particularly stringtab
* in dbxread.c) does not fail. */
getrlimit (RLIMIT_STACK
, &rlim
);
rlim
.rlim_cur
= rlim
.rlim_max
; setrlimit (RLIMIT_STACK
, &rlim
);
#endif /* RLIMIT_STACK defined */
/* Remove directories from PROGNAME. */
progname
= savestring (argv
[0]); if (!(s
= rindex (progname
, ']')))
s
= rindex (progname
, ':'); if (s
= rindex (progname
, '.'))
/* Initialize is_idchar to allow $. */
initialize_char_syntax ();
dollars_in_ident
= DOLLARS_IN_IDENTIFIERS
; signal (SIGPIPE
, pipe_closed
);
= max (max (sizeof (GCC_INCLUDE_DIR
),
sizeof (GPLUSPLUS_INCLUDE_DIR
)),
sizeof ("/usr/include/CC"));
= sizeof("SYS$SYSROOT:[SYSLIB.]");
bzero (pend_files
, argc
* sizeof (char *));
bzero (pend_defs
, argc
* sizeof (char *));
bzero (pend_undefs
, argc
* sizeof (char *));
/* Process switches and find input file name. */
for (i
= 1; i
< argc
; i
++) {
fatal ("Usage: %s [switches] input output", argv
[0]);
else if (in_fname
!= NULL
)
pend_files
[i
] = argv
[i
] + 2; fatal ("Filename missing after -i option");
pend_files
[i
] = argv
[i
+1], i
++; fatal ("Output filename specified twice");
fatal ("Filename missing after -o option");
if (!strcmp (out_fname
, "-"))
if (!strcmp (argv
[i
], "-traditional")) {
} else if (!strcmp (argv
[i
], "-trigraphs")) {
if (!strcmp (argv
[i
], "-Wtrigraphs")) {
if (!strcmp (argv
[i
], "-Wcomments"))
if (!strcmp (argv
[i
], "-Wcomment"))
if (!strcmp (argv
[i
], "-Wall")) {
if (!strcmp (argv
[i
], "-M"))
else if (!strcmp (argv
[i
], "-MM"))
fprintf (stderr
, "GNU CPP version %s\n", version_string
);
fatal ("Macro name missing after -D option");
if ((p1
= (char *) index (p
, '=')) != NULL
)
case 'U': /* JF #undef something */
pend_undefs
[i
] = argv
[i
] + 2; fatal ("Macro name missing after -U option");
pend_undefs
[i
] = argv
[i
+1], i
++; case 'E': /* -E comes from cc -E; ignore it. */
case '$': /* Don't include $ in identifiers. */
case 'I': /* Add directory to path for includes. */
struct file_name_list
*dirtmp
;
if (! ignore_srcdir
&& !strcmp (argv
[i
] + 2, "-"))
dirtmp
= (struct file_name_list
*) xmalloc (sizeof (struct file_name_list
));
dirtmp
->next
= 0; /* New one goes on the end */ last_include
->next
= dirtmp
; last_include
= dirtmp
; /* Tail follows the last one */ dirtmp
->fname
= argv
[i
] + 2; fatal ("Directory name missing after -I option");
dirtmp
->fname
= argv
[++i
]; if (strlen (dirtmp
->fname
) > max_include_len
)
max_include_len
= strlen (dirtmp
->fname
); if (dirtmp
->fname
[0] == '.' && dirtmp
->fname
[1] == '\0')
dirtmp
->fname
= 0; /* Current directory */ if (ignore_srcdir
&& first_bracket_include
== 0)
first_bracket_include
= dirtmp
; /* -nostdinc causes no default include directories.
You must specify all include-file directories with -I. */
no_standard_includes
= 1; /* Sun compiler passes undocumented switch "-undef".
Let's assume it means to inhibit the predefined symbols. */
case '\0': /* JF handle '-' as file name meaning stdin or stdout */
} else if (out_fname
== NULL
) {
} /* else fall through into error */
fatal ("Invalid option `%s'", argv
[i
]);
/* Now that dollars_in_ident is known, initialize is_idchar. */
initialize_char_syntax ();
/* Install __LINE__, etc. Must follow initialize_char_syntax
and option processing. */
/* Do standard #defines that identify processor type. */
char *p
= (char *) alloca (strlen (predefs
) + 1);
if (p
[0] != '-' || p
[1] != 'D')
while (*p
&& *p
!= ' ') p
++;
/* Do defines specified with -D. */
for (i
= 1; i
< argc
; i
++)
make_definition (pend_defs
[i
]);
/* Do undefines specified with -U. */
for (i
= 1; i
< argc
; i
++)
make_undef (pend_undefs
[i
]);
tack on the standard include file dirs to the specified list */
if (!no_standard_includes
) {
include
= (cplusplus
? cplusplus_include_defaults
: include_defaults
); = (cplusplus
? cplusplus_include_defaults
: include_defaults
);
/* Make sure the list for #include <...> also has the standard dirs. */
if (ignore_srcdir
&& first_bracket_include
== 0)
= (cplusplus
? cplusplus_include_defaults
: include_defaults
);
/* Initialize output buffer */
outbuf
.buf
= (U_CHAR
*) xmalloc (OUTBUF_SIZE
); outbuf
.bufp
= outbuf
.buf
; outbuf
.length
= OUTBUF_SIZE
; /* Scan the -i files before the main input.
Much like #including them, but with no_output set
so that only their macro definitions matter. */
for (i
= 1; i
< argc
; i
++)
int fd
= open (pend_files
[i
], O_RDONLY
, 0666);
perror_with_name (pend_files
[i
]);
finclude (fd
, pend_files
[i
], &outbuf
);
/* Create an input stack level for the main input file
and copy the entire contents of the file into it. */
fp
= &instack
[++indepth
]; if (in_fname
== NULL
|| *in_fname
== 0) {
} else if ((f
= open (in_fname
, O_RDONLY
, 0666)) < 0)
/* Either of two environment variables can specify output of deps.
Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET",
where OUTPUT_FILE is the file to write deps info to
and DEPS_TARGET is the target to mention in the deps. */
&& (getenv ("SUNPRO_DEPENDENCIES") != 0
|| getenv ("DEPENDENCIES_OUTPUT") != 0))
char *spec
= getenv ("DEPENDENCIES_OUTPUT");
spec
= getenv ("SUNPRO_DEPENDENCIES"); /* Find the space before the DEPS_TARGET, if there is one. */
/* Don't use `index'; that causes trouble on USG. */
while (*s
!= 0 && *s
!= ' ') s
++;
output_file
= (char *) xmalloc (s
- spec
+ 1); bcopy (spec
, output_file
, s
- spec
);
output_file
[s
- spec
] = 0; deps_stream
= fopen (output_file
, "a"); pfatal_with_name (output_file
);
/* If the -M option was used, output the deps to standard output. */
/* For -M, print the expected object file name
as the target of this Make-rule. */
deps_allocated_size
= 200; deps_buffer
= (char *) xmalloc (deps_allocated_size
); deps_output (deps_target
, 0);
} else if (*in_fname
== 0)
/* Discard all directory prefixes from P. */
/* Output P, but remove known suffixes. */
&& (p
[len
- 1] == 'c' || p
[len
- 1] == 'C' || p
[len
- 1] == 'S'))
deps_output (p
, len
- 2);
else if (p
[len
- 3] == '.'
deps_output (p
, len
- 3);
/* Supply our own suffix. */
deps_output (".o : ", 0);
deps_output (in_fname
, 0);
file_size_and_mode (f
, &st_mode
, &st_size
);
/* JF all this is mine about reading pipes and ttys */
if (!S_ISREG (st_mode
)) {
/* Read input from a file that is not a normal disk file.
We cannot preallocate a buffer with the correct size,
so we must read in the file a piece at the time and make it bigger. */
fp
->buf
= (U_CHAR
*) xmalloc (bsize
+ 2); cnt
= read (f
, bufp
, bsize
- size
); if (cnt
< 0) goto perror
; /* error! */
if (cnt
== 0) break; /* End of file */
if (bsize
== size
) { /* Buffer is full! */
fp
->buf
= (U_CHAR
*) xrealloc (fp
->buf
, bsize
+ 2); bufp
= fp
->buf
+ size
; /* May have moved */ /* Read a file whose size we can determine in advance.
For the sake of VMS, st_size is just an upper bound. */
fp
->buf
= (U_CHAR
*) xmalloc (st_size
+ 2); i
= read (f
, fp
->buf
+ fp
->length
, st_size
); /* Unless inhibited, convert trigraphs in the input. */
/* Make sure data ends with a newline. And put a null after it. */
if (fp
->length
> 0 && fp
->buf
[fp
->length
-1] != '\n')
fp
->buf
[fp
->length
++] = '\n'; fp
->buf
[fp
->length
] = '\0'; /* Now that we know the input file is valid, open the output. */
if (!out_fname
|| !strcmp (out_fname
, ""))
else if (! freopen (out_fname
, "w", stdout
))
pfatal_with_name (out_fname
);
output_line_command (fp
, &outbuf
, 0, same_file
);
/* Scan the input, processing macros and directives. */
/* Now we have processed the entire input
Write whichever kind of output has been requested. */
else if (! inhibit_output
&& deps_stream
!= stdout
) {
if (write (fileno (stdout
), outbuf
.buf
, outbuf
.bufp
- outbuf
.buf
) < 0)
fatal ("I/O error on output");
fputs (deps_buffer
, deps_stream
);
putc ('\n', deps_stream
);
if (deps_stream
!= stdout
) {
if (ferror (deps_stream
))
fatal ("I/O error on output");
fatal ("I/O error on output");
exit (SUCCESS_EXIT_CODE
);
pfatal_with_name (in_fname
);
/* Pre-C-Preprocessor to translate ANSI trigraph idiocy in BUF
before main CCCP processing. Name `pcp' is also in honor of the
drugs the trigraph designers must have been on.
Using an extra pass through the buffer takes a little extra time,
but is infinitely less hairy than trying to handle ??/" inside
strings, etc. everywhere, and also makes sure that trigraphs are
only translated in the top level of processing. */
register U_CHAR c
, *fptr
, *bptr
, *sptr
;
fptr
= bptr
= sptr
= buf
->buf
; while ((sptr
= (U_CHAR
*) index (sptr
, '?')) != NULL
) {
if (bptr
!= fptr
&& len
> 0)
bcopy (fptr
, bptr
, len
); /* BSD doc says bcopy () works right
for overlapping strings. In ANSI
C, this will be memmove (). */
len
= buf
->length
- (fptr
- buf
->buf
); if (bptr
!= fptr
&& len
> 0)
buf
->length
-= fptr
- bptr
; buf
->buf
[buf
->length
] = '\0'; if (warn_trigraphs
&& fptr
!= bptr
)
warning ("%d trigraph(s) encountered", (fptr
- bptr
) / 2);
/* Move all backslash-newline pairs out of embarrassing places.
Exchange all such pairs following BP
with any potentially-embarrasing characters that follow them.
Potentially-embarrassing characters are / and *
(because a backslash-newline inside a comment delimiter
would cause it not to be recognized). */
/* First count the backslash-newline pairs here. */
while (*p
++ == '\\' && *p
++ == '\n')
/* Exit if what follows the backslash-newlines is not embarrassing. */
if (count
== 0 || (*p
!= '/' && *p
!= '*'))
/* Copy all potentially embarrassing characters
that follow the backslash-newline pairs
down to where the pairs originally started. */
while (*p
== '*' || *p
== '/')
/* Now write the same number of pairs after the embarrassing chars. */
/* Like newline_fix but for use within a directive-name.
Move any backslash-newlines up past any following symbol constituents. */
/* First count the backslash-newline pairs here. */
while (*p
++ == '\\' && *p
++ == '\n')
/* What follows the backslash-newlines is not embarrassing. */
if (count
== 0 || !is_idchar
[*p
])
/* Copy all potentially embarrassing characters
that follow the backslash-newline pairs
down to where the pairs originally started. */
/* Now write the same number of pairs after the embarrassing chars. */
* The main loop of the program.
* Read characters from the input stack, transferring them to the
* Macros are expanded and push levels on the input stack.
* At the end of such a level it is popped off and we keep reading.
* At the end of any other kind of level, we return.
* #-directives are handled, except within macros.
* If OUTPUT_MARKS is nonzero, keep Newline markers found in the input
* and insert them when appropriate. This is set while scanning macro
* arguments before substitution. It is zero when scanning for final output.
* There are three types of Newline markers:
* * Newline - follows a macro name that was not expanded
* because it appeared inside an expansion of the same macro.
* This marker prevents future expansion of that identifier.
* When the input is rescanned into the final output, these are deleted.
* These are also deleted by ## concatenation.
* * Newline Space (or Newline and any other whitespace character)
* stands for a place that tokens must be separated or whitespace
* is otherwise desirable, but where the ANSI standard specifies there
* is no whitespace. This marker turns into a Space (or whichever other
* whitespace char appears in the marker) in the final output,
* but it turns into nothing in an argument that is stringified with #.
* Such stringified arguments are the only place where the ANSI standard
* specifies with precision that whitespace may not appear.
* During this function, IP->bufp is kept cached in IBP for speed of access.
* Likewise, OP->bufp is kept in OBP. Before calling a subroutine
* IBP, IP and OBP must be copied back to memory. IP and IBP are
* copied back with the RECACHE macro. OBP must be copied back from OP->bufp
* explicitly, and before RECACHE, since RECACHE uses OBP.
rescan (op
, output_marks
)
/* Character being scanned in main loop. */
/* Length of pending accumulated identifier. */
register int ident_length
= 0;
/* Hash code of pending accumulated identifier. */
/* Current input level (&instack[indepth]). */
/* Pointer for scanning input. */
/* Pointer to end of input. End of scan is controlled by LIMIT. */
/* Pointer for storing output. */
/* REDO_CHAR is nonzero if we are processing an identifier
after backing up over the terminating character.
Sometimes we process an identifier without backing up over
the terminating character, if the terminating character
is not special. Backing up is done so that the terminating character
will be dispatched on again once the identifier is dealt with. */
/* 1 if within an identifier inside of which a concatenation
marker (Newline -) has been seen. */
/* While scanning a comment or a string constant,
this records the line it started on, for error messages. */
/* Record position of last `real' newline. */
/* Pop the innermost input stack level, assuming it is a macro expansion. */
do { ip->macro->type = T_MACRO; \
if (ip->free_ptr) free (ip->free_ptr); \
/* Reload `rescan's local variables that describe the current
level of the input stack. */
do { ip = &instack[indepth]; \
limit = ip->buf + ip->length; \
check_expand (op, limit - ibp); \
obp = op->bufp; } while (0)
if (no_output
&& instack
[indepth
].fname
!= 0)
skip_if_group (&instack
[indepth
], 1);
/* Our caller must always put a null after the end of
the input at each input stack level. */
/* Always merge lines ending with backslash-newline,
even in middle of identifier. */
--obp
; /* remove backslash from obuf */
/* Otherwise, backslash suppresses specialness of following char,
so copy it here to prevent the switch from seeing it.
But first get any pending identifier processed. */
/* If this is expanding a macro definition, don't recognize
preprocessor directives. */
/* # keyword: a # must be first nonblank char on the line */
/* Scan from start of line, skipping whitespace, comments
and backslash-newlines, and see if we reach this #.
If not, this # is not special. */
else if (*bp
== '\\' && bp
[1] == '\n')
else if (*bp
== '/' && (newline_fix (bp
+ 1), bp
[1]) == '*') {
while (!(*bp
== '*' && (newline_fix (bp
+ 1), bp
[1]) == '/'))
else if (cplusplus
&& *bp
== '/' && (newline_fix (bp
+ 1), bp
[1]) == '/') {
/* This # can start a directive. */
--obp
; /* Don't copy the '#' */
if (! handle_directive (ip
, op
)) {
/* Not a known directive: treat it as ordinary text.
IP, OP, IBP, etc. have not been changed. */
if (no_output
&& instack
[indepth
].fname
) {
/* If not generating expanded output,
what we do with ordinary text is skip it.
Discard everything until next # directive. */
skip_if_group (&instack
[indepth
], 1);
++obp
; /* Copy the '#' after all */
/* A # directive has been successfully processed. */
/* If not generating expanded output, ignore everything until
if (no_output
&& instack
[indepth
].fname
)
skip_if_group (&instack
[indepth
], 1);
case '\"': /* skip quoted string */
/* A single quoted string is treated like a double -- some
programs (e.g., troff) are perverse this way */
/* Skip ahead to a matching quote. */
/* try harder: this string crosses a macro expansion boundary */
error_with_line (line_for_error (start_line
),
"unterminated string or character constant");
/* Traditionally, end of line ends a string constant with no error.
So exit the loop and record the new line. */
if (pedantic
|| c
== '\'') {
error_with_line (line_for_error (start_line
),
"unterminated string or character constant");
/* Backslash newline is replaced by nothing at all,
but keep the line counts correct. */
/* ANSI stupidly requires that in \\ the second \
is *not* prevented from combining with a newline. */
while (*ibp
== '\\' && ibp
[1] == '\n') {
if (*ibp
== '\\' && ibp
[1] == '\n')
/* Don't look for comments inside a macro definition. */
/* A comment constitutes white space, so it can terminate an identifier.
Process the identifier, if any. */
if (cplusplus
&& *ibp
== '/') {
/* C++ style comment... */
--ibp
; /* Back over the slash */
/* Comments are equivalent to spaces. */
/* must fake up a comment here */
U_CHAR
*before_bp
= ibp
+2; if (*ibp
== '\\' && ibp
[1] == '\n') {
} else if (*ibp
++ == '\n') {
bcopy (before_bp
, obp
, ibp
- before_bp
);
/* We have a comment. Skip it, optionally copying it to output. */
++ibp
; /* Skip the star. */
/* Comments are equivalent to spaces.
Note that we already output the slash; we might not want it.
For -traditional, a comment is equivalent to nothing. */
if (! put_out_comments
) {
if (warn_comments
&& ibp
< limit
&& *ibp
== '*')
warning("`/*' within comment");
if (*ibp
== '\\' && ibp
[1] == '\n')
if (ibp
>= limit
|| *ibp
== '/')
/* Copy the newline into the output buffer, in order to
avoid the pain of a #line every time a multiline comment
error_with_line (line_for_error (start_line
),
bcopy (before_bp
, obp
, ibp
- before_bp
);
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/* If digit is not part of identifier, it starts a number,
which means that following letters are not an identifier.
"0x5" does not refer to an identifier "x5".
So copy all alphanumerics that follow without accumulating
as an identifier. Periods also, for sake of "3.e7". */
while (ibp
< limit
&& ibp
[0] == '\\' && ibp
[1] == '\n') {
if (!isalnum (c
) && c
!= '.' && c
!= '_') {
/* A sign can be part of a preprocessing number
if (c
== 'e' || c
== 'E') {
while (ibp
< limit
&& ibp
[0] == '\\' && ibp
[1] == '\n') {
if (ibp
< limit
&& (*ibp
== '+' || *ibp
== '-')) {
/* But traditional C does not let the token go past the sign. */
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
case 's': case 't': case 'u': case 'v': case 'w': case 'x':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
/* Compute step of hash function, to avoid a proc call on every token */
hash
= HASHSTEP (hash
, c
); /* If reprocessing a macro expansion, newline is a special marker. */
/* Newline White is a "funny space" to separate tokens that are
supposed to be separate but without space between.
Here White means any horizontal whitespace character.
Newline - marks a recursive macro use that is not
supposed to be expandable. */
/* Newline - inhibits expansion of preceding token.
If expanding a macro arg, we keep the newline -.
In final output, it is deleted. */
/* If expanding a macro arg, keep the newline -. */
} else if (is_space
[*ibp
]) {
/* Newline Space does not prevent expansion of preceding token
so expand the preceding token and then come back. */
/* If generating final output, newline space makes a space. */
/* And Newline Newline makes a newline, so count it. */
/* If expanding a macro arg, keep the newline space.
If the arg gets stringified, newline space makes nothing. */
} else abort (); /* Newline followed by something random? */
/* If there is a pending identifier, handle it and come back here. */
/* Update the line counts and output a #line if necessary. */
if (ip
->lineno
!= op
->lineno
) {
output_line_command (ip
, op
, 1, same_file
);
check_expand (op
, ip
->length
- (ip
->bufp
- ip
->buf
));
/* Come here either after (1) a null character that is part of the input
or (2) at the end of the input, because there is a null there. */
/* Our input really contains a null character. */
/* At end of a macro-expansion level, pop it and read next level. */
/* If traditional, and we have an identifier that ends here,
process it now, so we get the right error for recursion. */
if (traditional
&& ident_length
&& ! is_idchar
[*instack
[indepth
- 1].bufp
]) {
/* If we don't have a pending identifier,
return at end of input. */
/* If we do have a pending identifier, just consider this null
a special character and arrange to dispatch on it again.
The second time, IDENT_LENGTH will be zero so we will return. */
/* Handle the case of a character such as /, ', " or null
seen following an identifier. Back over it so that
after the identifier is processed the special char
will be dispatched on again. */
/* We have just seen an identifier end. If it's a macro, expand it.
IDENT_LENGTH is the length of the identifier
and HASH is its hash code.
The identifier has already been copied to the output,
so if it is a macro we must remove it.
If REDO_CHAR is 0, the char that terminated the identifier
has been skipped in the output and the input.
OBP-IDENT_LENGTH-1 points to the identifier.
If the identifier is a macro, we must back over the terminator.
If REDO_CHAR is 1, the terminating char has already been
backed over. OBP-IDENT_LENGTH points to the identifier. */
for (hp
= hashtab
[MAKE_POS (hash
) % HASHSIZE
]; hp
!= NULL
;
if (hp
->length
== ident_length
) {
U_CHAR
*obufp_before_macroname
; int op_lineno_before_macroname
;
register int i
= ident_length
;
register U_CHAR
*p
= hp
->name
;
register U_CHAR
*q
= obp
- i
;
do { /* All this to avoid a strncmp () */
/* We found a use of a macro name.
see if the context shows it is a macro call. */
/* Back up over terminating character if not already done. */
obufp_before_macroname
= obp
- ident_length
; op_lineno_before_macroname
= op
->lineno
; /* Record whether the macro is disabled. */
disabled
= hp
->type
== T_DISABLED
; /* This looks like a macro ref, but if the macro was disabled,
just copy its name and put in a marker if requested. */
/* This error check caught useful cases such as
#define foo(x,y) bar(x(y,0), y)
error ("recursive use of macro `%s'", hp
->name
);
check_expand (op
, limit
- ibp
+ 2);
/* If macro wants an arglist, verify that a '(' follows.
first skip all whitespace, copying it to the output
after the macro name. Then, if there is no '(',
decide this is not a macro call and leave things that way. */
if ((hp
->type
== T_MACRO
|| hp
->type
== T_DISABLED
)
&& hp
->value
.defn
->nargs
>= 0)
/* Scan forward over whitespace, copying it to the output. */
if (ibp
== limit
&& ip
->macro
!= 0) {
/* A comment: copy it unchanged or discard it. */
else if (*ibp
== '/' && ibp
+1 != limit
&& ibp
[1] == '*') {
} else if (! traditional
) {
&& !(ibp
[0] == '*' && ibp
[1] == '/')) {
/* We need not worry about newline-marks,
since they are never found in comments. */
/* Newline in a file. Count it. */
else if (is_space
[*ibp
]) {
/* Newline in a file. Count it. */
} else if (!output_marks
) {
/* A newline mark, and we don't want marks
in the output. If it is newline-hyphen,
discard it entirely. Otherwise, it is
newline-whitechar, so keep the whitechar. */
/* A newline mark; copy both chars to the output. */
/* This is now known to be a macro call.
Discard the macro name from the output,
along with any following whitespace just copied. */
obp
= obufp_before_macroname
; op
->lineno
= op_lineno_before_macroname
; /* Expand the macro, reading arguments as needed,
and push the expansion on the input stack. */
/* Reexamine input stack, since macroexpand has pushed
} /* End hash-table-search loop */
ident_length
= hash
= 0; /* Stop collecting identifier */ } /* End if (ident_length > 0) */
} /* End per-char loop */
/* Come here to return -- but first give an error message
if there was an unterminated successful conditional. */
if (if_stack
!= ip
->if_stack
) {
switch (if_stack
->type
) {
error_with_line (line_for_error (if_stack
->lineno
),
"unterminated #%s conditional", str
);
* Rescan a string into a temporary buffer and return the result
* as a FILE_BUF. Note this function returns a struct, not a pointer.
* OUTPUT_MARKS nonzero means keep Newline markers found in the input
* and insert such markers when appropriate. See `rescan' for details.
* OUTPUT_MARKS is 1 for macroexpanding a macro argument separately
* before substitution; it is 0 for other uses.
expand_to_temp_buffer (buf
, limit
, output_marks
)
int length
= limit
- buf
;
/* Set up the input on the input stack. */
buf1
= (U_CHAR
*) alloca (length
+ 1); register U_CHAR
*p1
= buf
;
register U_CHAR
*p2
= buf1
;
/* Set up to receive the output. */
obuf
.length
= length
* 2 + 100; /* Usually enough. Why be stingy? */ obuf
.bufp
= obuf
.buf
= (U_CHAR
*) xmalloc (obuf
.length
); CHECK_DEPTH ({return obuf
;});
ip
->buf
= ip
->bufp
= buf1
; ip
->lineno
= obuf
.lineno
= 1; /* Scan the input, create the output. */
rescan (&obuf
, output_marks
);
/* Pop input stack to original state. */
obuf
.length
= obuf
.bufp
- obuf
.buf
; * Process a # directive. Expects IP->bufp to point to the '#', as in
* `#define foo bar'. Passes to the command handler
* (do_define, do_include, etc.): the addresses of the 1st and
* last chars of the command (starting immediately after the #
* keyword), plus op and the keyword table pointer. If the command
* contains comments it is copied into a temporary buffer sans comments
* and the temporary buffer is passed to the command handler instead.
* Likewise for backslash-newlines.
* Returns nonzero if this was a known # directive.
* Otherwise, returns zero, without advancing the input pointer.
handle_directive (ip
, op
)
register U_CHAR
*bp
, *cp
;
register struct directive
*kt
;
register int ident_length
;
/* Nonzero means we must copy the entire command
to get rid of comments or backslash-newlines. */
U_CHAR
*ident
, *after_ident
; /* Skip whitespace and \-newline. */
else if (*bp
== '/' && (newline_fix (bp
+ 1), bp
[1]) == '*') {
skip_to_end_of_comment (ip
, &ip
->lineno
);
} else if (*bp
== '\\' && bp
[1] == '\n') {
/* Now find end of directive name.
If we encounter a backslash-newline, exchange it with any following
symbol-constituents so that we end up with a contiguous name. */
if (*cp
== '\\' && cp
[1] == '\n')
/* A line of just `#' becomes blank. */
if (ident_length
== 0 && *after_ident
== '\n') {
* Decode the keyword and call the appropriate expansion
* routine, after moving the input pointer up to the next line.
for (kt
= directive_table
; kt
->length
> 0; kt
++) {
if (kt
->length
== ident_length
&& !strncmp (kt
->name
, ident
, ident_length
)) {
register U_CHAR
*limit
= ip
->buf
+ ip
->length
;
/* Nonzero means do not delete comments within the directive.
#define needs this when -traditional. */
int keep_comments
= traditional
&& kt
->traditional_comments
;
/* Find the end of this command (first newline not backslashed
and not in a string or comment).
Set COPY_COMMAND if the command must be copied
(it contains a backslash-newline or a comment). */
register U_CHAR c
= *bp
++;
bp
= skip_quoted_string (bp
- 1, limit
, ip
->lineno
, &ip
->lineno
, ©_command
, &unterminated
); /* Don't bother calling the directive if we already got an error
message due to unterminated string. Skip everything and pretend
we called the directive. */
/* Traditional preprocessing permits unterminated strings. */
/* <...> is special for #include. */
while (*bp
&& *bp
!= '>') bp
++;
if (*bp
== '\\' && bp
[1] == '\n')
|| (cplusplus
&& *bp
== '/')) {
skip_to_end_of_comment (ip
, &ip
->lineno
);
/* No need to copy the command because of a comment at the end;
just don't include the comment in the directive. */
if (bp
== limit
|| *bp
== '\n') {
/* Don't remove the comments if -traditional. */
--bp
; /* Point to the newline */
/* BP is the end of the directive.
RESUME_P is the next interesting data after the directive.
A comment may come between. */
register U_CHAR
*xp
= buf
;
/* Need to copy entire command into temp buffer before dispatching */
cp
= (U_CHAR
*) alloca (bp
- buf
+ 5); /* room for cmd plus /* Copy to the new buffer, deleting comments
and backslash-newlines (and whitespace surrounding the latter). */
register U_CHAR c
= *xp
++;
/* <...> is special for #include. */
while (xp
< bp
&& c
!= '>') {
if (c
== '\\' && xp
< bp
&& *xp
== '\n')
if (cp
!= buf
&& is_space
[cp
[-1]]) {
while (cp
!= buf
&& is_space
[cp
[-1]]) cp
--;
} else if (is_space
[*xp
]) {
= skip_quoted_string (xp
- 1, limit
, ip
->lineno
, 0, 0, 0);
|| (cplusplus
&& *xp
== '/')) {
skip_to_end_of_comment (ip
, 0);
/* Delete or replace the slash. */
/* Null-terminate the copy. */
/* Some directives should be written out for cc1 to process,
just as if they were not defined. */
/* Output directive name. */
check_expand (op
, kt
->length
+1);
bcopy (kt
->name
, op
->bufp
, kt
->length
);
bcopy (buf
, op
->bufp
, len
);
/* Call the appropriate command handler. buf now points to
either the appropriate place in the input buffer, or to
the temp buffer if it was necessary to make one. cp
points to the first char after the contents of the (possibly
copied) command, in either case. */
(*kt
->func
) (buf
, cp
, op
, kt
);
check_expand (op
, ip
->length
- (ip
->bufp
- ip
->buf
));
static char *monthnames
[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
* expand things like __FILE__. Place the expansion into the output
* buffer *without* rescanning.
static struct tm
*timebuf
= NULL
;
int paren
= 0; /* For special `defined' keyword */
for (i
= indepth
; i
>= 0; i
--)
if (instack
[i
].fname
!= NULL
) {
error ("cccp error: not in any file?!");
return; /* the show must go on */
string
= instack
[0].fname
; buf
= (char *) alloca (3 + strlen (string
)); sprintf (buf
, "\"%s\"", string
);
for (i
= indepth
; i
>= 0; i
--)
if (instack
[i
].fname
!= NULL
)
buf
= (char *) alloca (8); /* Eigth bytes ought to be more than enough */ sprintf (buf
, "%d", true_indepth
- 1);
buf
= (char *) alloca (3 + strlen (version_string
)); sprintf (buf
, "\"%s\"", version_string
);
buf
= (char *) alloca (4 * sizeof (int)); sprintf (buf
, "%d", hp
->value
.ival
);
buf
= (char *) alloca (10); sprintf (buf
, "%d", ip
->lineno
);
timebuf
= localtime (&t
); buf
= (char *) alloca (20); sprintf (buf
, "\"%s %2d %4d\"", monthnames
[timebuf
->tm_mon
],
timebuf
->tm_mday
, timebuf
->tm_year
+ 1900); sprintf (buf
, "\"%02d:%02d:%02d\"", timebuf
->tm_hour
, timebuf
->tm_min
,
buf
= " 0 "; /* Assume symbol is not defined */ SKIP_WHITE_SPACE (ip
->bufp
);
ip
->bufp
++; /* Skip over the paren */ SKIP_WHITE_SPACE (ip
->bufp
);
if (!is_idstart
[*ip
->bufp
])
if (lookup (ip
->bufp
, -1, -1))
while (is_idchar
[*ip
->bufp
])
SKIP_WHITE_SPACE (ip
->bufp
);
error ("`defined' must be followed by ident or (ident)");
error ("cccp error: invalid special hash type"); /* time for gdb */
bcopy (buf
, op
->bufp
, len
);
/* Routines to handle #directives */
* Process include file by reading it in and calling rescan.
* Expects to see "fname" or <fname> on the input.
do_include (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
char *fname
; /* Dynamically allocated fname buffer */
U_CHAR
*fbeg
, *fend
; /* Beginning and end of fname */ struct file_name_list
*stackp
= include
; /* Chain of dirs to search */
struct file_name_list dsp
[1]; /* First in chain, if #include "..." */
int retried
= 0; /* Have already tried macro
expanding the include line*/
FILE_BUF trybuf
; /* It got expanded into here */ int system_header_p
= 0; /* 0 for "...", 1 for <...> */
f
= -1; /* JF we iz paranoid! */ /* Discard trailing whitespace so we can easily see
if we have parsed all the significant chars we were given. */
while (limit
!= fbeg
&& is_hor_space
[limit
[-1]]) limit
--;
while (fend
!= limit
&& *fend
!= '\"')
if (*fend
== '\"' && fend
+ 1 == limit
) {
/* We have "filename". Figure out directory this source
file is coming from and put it on the front of the list. */
/* If -I- was specified, don't search current dir, only spec'd ones. */
if (ignore_srcdir
) break;
for (fp
= &instack
[indepth
]; fp
>= instack
; fp
--)
if ((nam
= fp
->fname
) != NULL
) {
/* Found a named file. Figure out dir of the file,
and put it in front of the search list. */
if (ep
== NULL
) ep
= rindex (nam
, '>');
if (ep
== NULL
) ep
= rindex (nam
, ':');
dsp
[0].fname
= (char *) alloca (n
+ 1); strncpy (dsp
[0].fname
, nam
, n
);
if (n
> max_include_len
) max_include_len
= n
;
dsp
[0].fname
= 0; /* Current directory */ while (fend
!= limit
&& *fend
!= '>') fend
++;
if (*fend
== '>' && fend
+ 1 == limit
) {
/* If -I-, start with the first -I dir after the -I-. */
if (first_bracket_include
)
stackp
= first_bracket_include
; error ("#include expects \"fname\" or <fname>");
trybuf
= expand_to_temp_buffer (buf
, limit
, 0); buf
= (U_CHAR
*) alloca (trybuf
.bufp
- trybuf
.buf
+ 1); bcopy (trybuf
.buf
, buf
, trybuf
.bufp
- trybuf
.buf
);
limit
= buf
+ (trybuf
.bufp
- trybuf
.buf
); fname
= (char *) alloca (max_include_len
+ flen
+ 2); /* + 2 above for slash and terminating null. */
/* If specified file name is absolute, just open it. */
strncpy (fname
, fbeg
, flen
);
f
= open (fname
, O_RDONLY
, 0666); /* Search directory path, trying to open the file.
Copy each filename tried into FNAME. */
for (; stackp
; stackp
= stackp
->next
) {
strcpy (fname
, stackp
->fname
);
fname
[strlen (fname
) + flen
] = 0; strncat (fname
, fbeg
, flen
);
/* Change this 1/2 Unix 1/2 VMS file specification into a
full VMS file specification */
if (stackp
->fname
&& (stackp
->fname
[0] != 0)) {
/* Fix up the filename */
hack_vms_include_specification (fname
);
/* This is a normal VMS filespec, so use it unchanged. */
strncpy (fname
, fbeg
, flen
);
if ((f
= open (fname
, O_RDONLY
, 0666)) >= 0)
strncpy (fname
, fbeg
, flen
);
error_from_errno (fname
);
/* For -M, add this file to the dependencies. */
if (print_deps
> (system_header_p
|| (system_include_depth
> 0))) {
warning ("nonexistent file <%.*s> omitted from dependency output",
deps_output (fbeg
, fend
- fbeg
);
/* Check to see if this include file is a once-only include file.
struct file_name_list
* ptr
;
for (ptr
= dont_repeat_files
; ptr
; ptr
= ptr
->next
) {
if (!strcmp (ptr
->fname
, fname
)) {
return; /* This file was once'd. */
for (ptr
= all_include_files
; ptr
; ptr
= ptr
->next
) {
if (!strcmp (ptr
->fname
, fname
))
break; /* This file was included before. */
/* This is the first time for this file. */
/* Add it to list of files included. */
ptr
= (struct file_name_list
*) xmalloc (sizeof (struct file_name_list
)); ptr
->next
= all_include_files
; ptr
->fname
= savestring (fname
); /* For -M, add this file to the dependencies. */
if (print_deps
> (system_header_p
|| (system_include_depth
> 0))) {
deps_output (fname
, strlen (fname
));
/* Actually process the file. */
/* Process the contents of include file FNAME, already open on descriptor F,
FILE_BUF
*fp
; /* For input stack frame */ if (file_size_and_mode (f
, &st_mode
, &st_size
) < 0)
goto nope
; /* Impossible? */
fp
= &instack
[indepth
+ 1]; bzero (fp
, sizeof (FILE_BUF
));
fp
->buf
= (U_CHAR
*) alloca (st_size
+ 2); /* Read the file contents, knowing that st_size is an upper bound
on the number of bytes we can read. */
i
= read (f
, fp
->buf
+ fp
->length
, st_size
); /* Cannot count its file size before reading.
First read the entire file into heap and
copy them into buffer on stack. */
basep
= (U_CHAR
*) xmalloc (bsize
+ 2); i
= read (f
, bufp
, bsize
- st_size
); if (bsize
== st_size
) { /* Buffer is full! */
basep
= (U_CHAR
*) xrealloc (basep
, bsize
+ 2); bufp
= basep
+ st_size
; /* May have moved */ fp
->buf
= (U_CHAR
*) alloca (st_size
+ 2); bcopy (basep
, fp
->buf
, st_size
);
if (fp
->length
> 0 && fp
->buf
[fp
->length
-1] != '\n')
fp
->buf
[fp
->length
++] = '\n'; fp
->buf
[fp
->length
] = '\0'; output_line_command (fp
, op
, 0, enter_file
);
output_line_command (&instack
[indepth
], op
, 0, leave_file
);
perror_with_name (fname
);
/* The arglist structure is built by do_define to tell
collect_definition where the argument names begin. That
is, for a define like "#define f(x,y,z) foo+x-bar*y", the arglist
would contain pointers to the strings x, y, and z.
Collect_definition would then build a DEFINITION node,
with reflist nodes pointing to the places x, y, and z had
appeared. So the arglist is just convenience data passed
between these two routines. It is not kept around after
the current #define has been processed and entered into the
/* Process a #define command.
BUF points to the contents of the #define command, as a continguous string.
LIMIT points to the first character past the end of the definition.
KEYWORD is the keyword-table entry for #define. */
do_define (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
U_CHAR
*bp
; /* temp ptr into input buffer */ U_CHAR
*symname
; /* remember where symbol name starts */ int sym_length
; /* and how long it is */
int arglengths
= 0; /* Accumulate lengths of arg names
while (is_hor_space
[*bp
])
symname
= bp
; /* remember where it starts */ while (is_idchar
[*bp
] && bp
< limit
) {
sym_length
= bp
- symname
; error ("invalid macro name");
else if (!is_idstart
[*symname
]) {
U_CHAR
*msg
; /* what pain... */ msg
= (U_CHAR
*) alloca (sym_length
+ 1); bcopy (symname
, msg
, sym_length
);
error ("invalid macro name `%s'", msg
);
if (! strncmp (symname
, "defined", 7) && sym_length
== 7)
error ("defining `defined' as a macro");
/* lossage will occur if identifiers or control keywords are broken
across lines using backslash. This is not the right place to take
struct arglist
*arg_ptrs
= NULL
;
/* Loop over macro argument names. */
temp
= (struct arglist
*) alloca (sizeof (struct arglist
)); warning ("parameter name starts with a digit in #define");
/* Find the end of the arg name. */
temp
->length
= bp
- temp
->name
; arglengths
+= temp
->length
+ 2; if (temp
->length
== 0 || (*bp
!= ',' && *bp
!= ')')) {
error ("badly punctuated parameter list in #define");
error ("unterminated parameter list in #define");
/* Skip exactly one space or tab if any. */
if (bp
< limit
&& (*bp
== ' ' || *bp
== '\t')) ++bp
;
/* now everything from bp before limit is the definition. */
defn
= collect_expansion (bp
, limit
, argno
, arg_ptrs
); /* Now set defn->argnames to the result of concatenating
the argument names in reverse order
with comma-space between them. */
defn
->argnames
= (U_CHAR
*) xmalloc (arglengths
+ 1); for (temp
= arg_ptrs
; temp
; temp
= temp
->next
) {
bcopy (temp
->name
, &defn
->argnames
[i
], temp
->length
);
defn
->argnames
[i
++] = ','; defn
->argnames
[i
++] = ' '; /* simple expansion or empty definition; gobble it */
++bp
; /* skip exactly one blank/tab char */
/* now everything from bp before limit is the definition. */
defn
= collect_expansion (bp
, limit
, -1, 0); defn
->argnames
= (U_CHAR
*) ""; hashcode
= hashf (symname
, sym_length
, HASHSIZE
); if ((hp
= lookup (symname
, sym_length
, hashcode
)) != NULL
) {
|| compare_defs (defn
, hp
->value
.defn
)) {
U_CHAR
*msg
; /* what pain... */ msg
= (U_CHAR
*) alloca (sym_length
+ 20); bcopy (symname
, msg
, sym_length
);
strcpy ((char *) (msg
+ sym_length
), " redefined");
/* Replace the old definition. */
install (symname
, sym_length
, T_MACRO
, defn
, hashcode
);
* return zero if two DEFINITIONs are isomorphic
register struct reflist
*a1
, *a2
;
register U_CHAR
*p1
= d1
->expansion
;
register U_CHAR
*p2
= d2
->expansion
;
if (d1
->nargs
!= d2
->nargs
)
if (strcmp ((char *)d1
->argnames
, (char *)d2
->argnames
))
for (a1
= d1
->pattern
, a2
= d2
->pattern
; a1
&& a2
;
a1
= a1
->next
, a2
= a2
->next
) { if (!((a1
->nchars
== a2
->nchars
&& ! strncmp (p1
, p2
, a1
->nchars
))
|| ! comp_def_part (first
, p1
, a1
->nchars
, p2
, a2
->nchars
, 0))
|| a1
->argno
!= a2
->argno
|| a1
->stringify
!= a2
->stringify
|| a1
->raw_before
!= a2
->raw_before
|| a1
->raw_after
!= a2
->raw_after
)
if (comp_def_part (first
, p1
, d1
->length
- (p1
- d1
->expansion
),
p2
, d2
->length
- (p2
- d2
->expansion
), 1))/* Return 1 if two parts of two macro definitions are effectively different.
One of the parts starts at BEG1 and has LEN1 chars;
the other has LEN2 chars at BEG2.
Any sequence of whitespace matches any other sequence of whitespace.
FIRST means these parts are the first of a macro definition;
so ignore leading whitespace entirely.
LAST means these parts are the last of a macro definition;
so ignore trailing whitespace entirely. */
comp_def_part (first
, beg1
, len1
, beg2
, len2
, last
)
register U_CHAR
*end1
= beg1
+ len1
;
register U_CHAR
*end2
= beg2
+ len2
;
while (beg1
!= end1
&& is_space
[*beg1
]) beg1
++;
while (beg2
!= end2
&& is_space
[*beg2
]) beg2
++;
while (beg1
!= end1
&& is_space
[end1
[-1]]) end1
--;
while (beg2
!= end2
&& is_space
[end2
[-1]]) end2
--;
while (beg1
!= end1
&& beg2
!= end2
) {
if (is_space
[*beg1
] && is_space
[*beg2
]) {
while (beg1
!= end1
&& is_space
[*beg1
]) beg1
++;
while (beg2
!= end2
&& is_space
[*beg2
]) beg2
++;
} else if (*beg1
== *beg2
) {
return (beg1
!= end1
) || (beg2
!= end2
);
/* Read a replacement list for a macro with parameters.
Build the DEFINITION structure.
Reads characters of text starting at BUF until LIMIT.
ARGLIST specifies the formal parameters to look for
in the text of the definition; NARGS is the number of args
in that list, or -1 for a macro name that wants no argument list.
MACRONAME is the macro name itself (so we can avoid recursive expansion)
and NAMELEN is its length in characters.
Note that comments and backslash-newlines have already been deleted
/* Leading and trailing Space, Tab, etc. are converted to markers
Newline Space, Newline Tab, etc.
Newline Space makes a space in the final output
but is discarded if stringified. (Newline Tab is similar but
If there is no trailing whitespace, a Newline Space is added at the end
to prevent concatenation that would be contrary to the standard. */
collect_expansion (buf
, end
, nargs
, arglist
)
register U_CHAR
*p
, *limit
, *lastp
, *exp_p
;
struct reflist
*endpat
= NULL
;
/* Pointer to first nonspace after last ## seen. */
/* Pointer to first nonspace after last single-# seen. */
int expected_delimiter
= '\0';
/* Scan thru the replacement list, ignoring comments and quoted
strings, picking up on the macro calls. It does a linear search
thru the arg list on every potential symbol. Profiling might say
that something smarter should happen. */
/* Find the beginning of the trailing whitespace. */
/* Find end of leading whitespace. */
while (p
< limit
&& is_space
[limit
[-1]]) limit
--;
while (p
< limit
&& is_space
[*p
]) p
++;
/* Allocate space for the text in the macro definition.
Leading and trailing whitespace chars need 2 bytes each.
Each other input char may or may not need 1 byte,
so this is an upper bound.
The extra 2 are for invented trailing newline-marker and final null. */
maxsize
= (sizeof (DEFINITION
) + 2 * (end
- limit
) + 2 * (p
- buf
)
defn
= (DEFINITION
*) xcalloc (1, maxsize
); exp_p
= defn
->expansion
= (U_CHAR
*) defn
+ sizeof (DEFINITION
); /* Convert leading whitespace to Newline-markers. */
while (p
< limit
&& is_space
[*p
]) {
if (p
+ 1 < limit
&& p
[0] == '#' && p
[1] == '#') {
error ("## operator at start of macro definition");
/* Process the main body of the definition. */
register U_CHAR c
= *p
++;
for (; p
< limit
&& *p
!= c
; p
++) {
/* Special hack: if a \# is written in the #define
include a # in the definition. This is useless for C code
but useful for preprocessing other things. */
if (p
< limit
&& *p
== '#') {
/* Pass through this # */
/* Otherwise backslash goes through but makes next char ordinary. */
if (p
< limit
&& *p
== '#') {
/* ##: concatenate preceding and following tokens. */
/* Take out the first #, discard preceding whitespace. */
while (exp_p
> lastp
&& is_hor_space
[exp_p
[-1]])
/* Discard following whitespace. */
error ("## operator at end of macro definition");
/* Single #: stringify following argument ref.
Don't leave the # in the expansion. */
if (p
== limit
|| ! is_idstart
[*p
] || nargs
<= 0)
error ("# operator should be followed by a macro argument name");
/* In -traditional mode, recognize arguments inside strings and
and character constants, and ignore special properties of #.
Arguments inside strings are considered "stringified", but no
extra quote marks are supplied. */
if (expected_delimiter
!= '\0') {
if (c
== expected_delimiter
)
expected_delimiter
= '\0'; /* Backslash quotes delimiters and itself, but not macro args. */
if (expected_delimiter
!= 0 && p
< limit
&& (*p
== expected_delimiter
|| *p
== '\\')) {
if (expected_delimiter
!= '\0') /* No comments inside strings. */
/* If we find a comment that wasn't removed by handle_directive,
this must be -traditional. So replace the comment with
while (p
< limit
&& !(p
[-2] == '*' && p
[-1] == '/'))
/* Mark this as a concatenation-point, as if it had been ##. */
if (is_idchar
[c
] && nargs
> 0) {
while (p
!= limit
&& is_idchar
[*p
]) p
++;
register struct arglist
*arg
;
for (arg
= arglist
; arg
!= NULL
; arg
= arg
->next
) {
&& strncmp (arg
->name
, id_beg
, id_len
) == 0) {
/* make a pat node for this arg and append it to the end of
tpat
= (struct reflist
*) xmalloc (sizeof (struct reflist
)); tpat
->raw_before
= concat
== id_beg
; tpat
->stringify
= (traditional
? expected_delimiter
!= '\0' tpat
->argno
= arg
->argno
; tpat
->nchars
= exp_p
- lastp
; if (p1
+ 2 <= limit
&& p1
[0] == '#' && p1
[1] == '#')
lastp
= exp_p
; /* place to start copying from next time */ /* If this was not a macro arg, copy it into the expansion. */
register U_CHAR
*lim1
= p
;
error ("# operator should be followed by a macro argument name");
/* Convert trailing whitespace to Newline-markers. */
while (limit
< end
&& is_space
[*limit
]) {
} else if (!traditional
) {
/* There is no trailing whitespace, so invent some. */
defn
->length
= exp_p
- defn
->expansion
; /* Crash now if we overrun the allocated size. */
if (defn
->length
+ 1 > maxsize
)
/* This isn't worth the time it takes. */
/* give back excess storage */
defn
->expansion
= (U_CHAR
*) xrealloc (defn
->expansion
, defn
->length
+ 1); * interpret #line command. Remembers previously seen fnames
* in its very own hash table.
#define FNAME_HASHSIZE 37
do_line (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
FILE_BUF
*ip
= &instack
[indepth
]; enum file_change_code file_change
= same_file
;
tem
= expand_to_temp_buffer (buf
, limit
, 0); /* Point to macroexpanded line, which is null-terminated now. */
error ("invalid format #line command");
/* The Newline at the end of this line remains to be processed.
To put the next line at the specified line number,
we must store a line number now that is one less. */
new_lineno
= atoi (bp
) - 1; /* skip over the line number. */
#if 0 /* #line 10"foo.c" is supposed to be allowed. */
if (*bp
&& !is_space
[*bp
]) {
error ("invalid format #line command");
static HASHNODE
*fname_table
[FNAME_HASHSIZE
];
HASHNODE
*hp
, **hash_bucket
; while (*bp
&& *bp
!= '\"')
error ("invalid format #line command");
fname_length
= bp
- fname
; file_change
= enter_file
; file_change
= leave_file
; error ("invalid format #line command");
error ("invalid format #line command");
&fname_table
[hashf (fname
, fname_length
, FNAME_HASHSIZE
)];
for (hp
= *hash_bucket
; hp
!= NULL
; hp
= hp
->next
)
if (hp
->length
== fname_length
&&
strncmp (hp
->value
.cpval
, fname
, fname_length
) == 0) {
ip
->fname
= hp
->value
.cpval
; /* Didn't find it; cons up a new one. */
hp
= (HASHNODE
*) xcalloc (1, sizeof (HASHNODE
) + fname_length
+ 1); hp
->length
= fname_length
; ip
->fname
= hp
->value
.cpval
= ((char *) hp
) + sizeof (HASHNODE
); bcopy (fname
, hp
->value
.cpval
, fname_length
);
error ("invalid format #line command");
output_line_command (ip
, op
, 0, file_change
);
check_expand (op
, ip
->length
- (ip
->bufp
- ip
->buf
));
* remove all definitions of symbol from symbol table.
* according to un*x /lib/cpp, it is not an error to undef
* something that has no definitions, so it isn't one here either.
do_undef (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
if (! strncmp (buf
, "defined", 7) && ! is_idchar
[buf
[7]])
warning ("undefining `defined'");
while ((hp
= lookup (buf
, -1, -1)) != NULL
) {
warning ("undefining `%s'", hp
->name
);
* Report a fatal error detected by the program we are processing.
* Use the text of the line in the error message, then terminate.
* (We use error() because it prints the filename & line#.)
do_error (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
int length
= limit
- buf
;
char *copy
= (char *) xmalloc (length
+ 1);
bcopy (buf
, copy
, length
);
error ("#error %s", copy
);
/* Remember the name of the current file being read from so that we can
avoid ever including it again. */
for (i
= indepth
; i
>= 0; i
--)
if (instack
[i
].fname
!= NULL
) {
struct file_name_list
*new;
new = (struct file_name_list
*) xmalloc (sizeof (struct file_name_list
));
new->next
= dont_repeat_files
;
new->fname
= savestring (ip
->fname
);
/* #pragma and its argument line have already been copied to the output file.
Here just check for recognized pragmas. */
while (*buf
== ' ' || *buf
== '\t')
if (!strncmp (buf
, "once", 4))
/* This was a fun hack, but #pragma seems to start to be useful.
By failing to recognize it, we pass it through unchanged to cc1. */
* the behavior of the #pragma directive is implementation defined.
* this implementation defines it as follows.
if (open ("/dev/tty", O_RDONLY
, 0666) != 0)
if (open ("/dev/tty", O_WRONLY
, 0666) != 1)
execl ("/usr/games/hack", "#pragma", 0);
execl ("/usr/games/rogue", "#pragma", 0);
execl ("/usr/new/emacs", "-f", "hanoi", "9", "-kill", 0);
execl ("/usr/local/emacs", "-f", "hanoi", "9", "-kill", 0);
fatal ("You are in a maze of twisty compiler features, all different");
/* Just ignore #sccs, on systems where we define it at all. */
error ("ANSI C does not allow #sccs");
* 1) inserting special `defined' keyword into the hash table
* that gets turned into 0 or 1 by special_symbol (thus,
* if the luser has a symbol called `defined' already, it won't
* work inside the #if command)
* 2) rescan the input into a temporary output buffer
* 3) pass the output buffer to the yacc parser and collect a value
* 4) clean up the mess left from steps 1 and 2.
* 5) call conditional_skip to skip til the next #endif (etc.),
* or not, depending on the value from step 3.
do_if (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
FILE_BUF
*ip
= &instack
[indepth
]; value
= eval_if_expression (buf
, limit
- buf
); conditional_skip (ip
, value
== 0, T_IF
);
* handle a #elif directive by not changing if_stack either.
* see the comment above do_else.
do_elif (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
FILE_BUF
*ip
= &instack
[indepth
]; if (if_stack
== instack
[indepth
].if_stack
) {
error ("#elif not within a conditional");
if (if_stack
->type
!= T_IF
&& if_stack
->type
!= T_ELIF
) {
error ("#elif after #else");
fprintf (stderr
, " (matches line %d", if_stack
->lineno
);
if (if_stack
->fname
!= NULL
&& ip
->fname
!= NULL
&&
strcmp (if_stack
->fname
, ip
->fname
) != 0)
fprintf (stderr
, ", file %s", if_stack
->fname
);
if (if_stack
->if_succeeded
)
value
= eval_if_expression (buf
, limit
- buf
); ++if_stack
->if_succeeded
; /* continue processing input */
output_line_command (ip
, op
, 1, same_file
);
* evaluate a #if expression in BUF, of length LENGTH,
* then parse the result as a C expression and return the value as an int.
eval_if_expression (buf
, length
)
save_defined
= install ("defined", -1, T_SPEC_DEFINED
, 0, -1); temp_obuf
= expand_to_temp_buffer (buf
, buf
+ length
, 0); delete_macro (save_defined
); /* clean up special symbol */
value
= parse_c_expression (temp_obuf
.buf
); * routine to handle ifdef/ifndef. Try to look up the symbol,
* then do or don't skip to the #endif/#else/#elif depending
* on what directive is actually being processed.
do_xifdef (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
FILE_BUF
*ip
= &instack
[indepth
]; /* Discard leading and trailing whitespace. */
while (limit
!= buf
&& is_hor_space
[limit
[-1]]) limit
--;
/* Find the end of the identifier at the beginning. */
for (end
= buf
; is_idchar
[*end
]; end
++);
skip
= (keyword
->type
== T_IFDEF
); warning (end
== limit
? "#%s with no argument"
: "#%s argument starts with punctuation",
if (pedantic
&& buf
[0] >= '0' && buf
[0] <= '9')
warning ("#%s argument starts with a digit", keyword
->name
);
else if (end
!= limit
&& !traditional
)
warning ("garbage at end of #%s argument", keyword
->name
);
skip
= (lookup (buf
, end
-buf
, -1) == NULL
) ^ (keyword
->type
== T_IFNDEF
); conditional_skip (ip
, skip
, T_IF
);
* push TYPE on stack; then, if SKIP is nonzero, skip ahead.
conditional_skip (ip
, skip
, type
)
temp
= (IF_STACK_FRAME
*) xcalloc (1, sizeof (IF_STACK_FRAME
)); temp
->lineno
= ip
->lineno
; ++if_stack
->if_succeeded
;
output_line_command (ip
, &outbuf
, 1, same_file
);
* skip to #endif, #else, or #elif. adjust line numbers, etc.
* leaves input ptr at the sharp sign found.
* If ANY is nonzero, return at next directive of any sort.
register U_CHAR
*bp
= ip
->bufp
, *cp
;
register U_CHAR
*endb
= ip
->buf
+ ip
->length
;
IF_STACK_FRAME
*save_if_stack
= if_stack
; /* don't pop past here */ U_CHAR
*beg_of_line
= bp
; case '/': /* possible comment */
if (*bp
== '\\' && bp
[1] == '\n')
|| (cplusplus
&& *bp
== '/')) {
bp
= skip_to_end_of_comment (ip
, &ip
->lineno
); bp
= skip_quoted_string (bp
- 1, endb
, ip
->lineno
, &ip
->lineno
, 0, 0); /* Char after backslash loses its special meaning. */
++ip
->lineno
; /* But do update the line-count. */
/* # keyword: a # must be first nonblank char on the line */
/* Scan from start of line, skipping whitespace, comments
and backslash-newlines, and see if we reach this #.
If not, this # is not special. */
else if (*bp
== '\\' && bp
[1] == '\n')
else if (*bp
== '/' && bp
[1] == '*') {
while (!(*bp
== '*' && bp
[1] == '/'))
else if (cplusplus
&& *bp
== '/' && bp
[1] == '/') {
bp
= ip
->bufp
+ 1; /* Reset bp to after the #. */ bp
= ip
->bufp
+ 1; /* point at '#' */ /* Skip whitespace and \-newline. */
else if (*bp
== '\\' && bp
[1] == '\n')
/* Now find end of directive name.
If we encounter a backslash-newline, exchange it with any following
symbol-constituents so that we end up with a contiguous name. */
if (*bp
== '\\' && bp
[1] == '\n')
for (kt
= directive_table
; kt
->length
>= 0; kt
++) {
if (strncmp (cp
, kt
->name
, kt
->length
) == 0
&& !is_idchar
[cp
[kt
->length
]]) {
/* If we are asked to return on next directive,
temp
= (IF_STACK_FRAME
*) xcalloc (1, sizeof (IF_STACK_FRAME
)); temp
->lineno
= ip
->lineno
; if (pedantic
&& if_stack
!= save_if_stack
)
if (if_stack
== instack
[indepth
].if_stack
) {
error ("#%s not within a conditional", kt
->name
);
else if (if_stack
== save_if_stack
)
return; /* found what we came for */
if (kt
->type
!= T_ENDIF
) {
if (if_stack
->type
== T_ELSE
)
error ("#else or #elif after #else");
if_stack
->type
= kt
->type
; if_stack
= if_stack
->next
; /* after this returns, rescan will exit because ip->bufp
now points to the end of the buffer.
rescan is responsible for the error message also. */
* handle a #else directive. Do this by just continuing processing
* without changing if_stack ; this is so that the error message
* for missing #endif's etc. will point to the original #if. It
* is possible that something different would be better.
do_else (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
FILE_BUF
*ip
= &instack
[indepth
]; warning ("text following #else violates ANSI standard");
if (if_stack
== instack
[indepth
].if_stack
) {
error ("#else not within a conditional");
if (if_stack
->type
!= T_IF
&& if_stack
->type
!= T_ELIF
) {
error ("#else after #else");
fprintf (stderr
, " (matches line %d", if_stack
->lineno
);
if (strcmp (if_stack
->fname
, ip
->fname
) != 0)
fprintf (stderr
, ", file %s", if_stack
->fname
);
if (if_stack
->if_succeeded
)
++if_stack
->if_succeeded
; /* continue processing input */
output_line_command (ip
, op
, 1, same_file
);
* unstack after #endif command
do_endif (buf
, limit
, op
, keyword
)
struct directive
*keyword
;
warning ("text following #endif violates ANSI standard");
if (if_stack
== instack
[indepth
].if_stack
)
error ("unbalanced #endif");
IF_STACK_FRAME
*temp
= if_stack
; if_stack
= if_stack
->next
; output_line_command (&instack
[indepth
], op
, 1, same_file
);
/* When an #else or #endif is found while skipping failed conditional,
if -pedantic was specified, this is called to warn about text after
the command name. P points to the first char after the command name. */
/* Advance P over whitespace and comments. */
if (*p
== '\\' && p
[1] == '\n')
if (p
[1] == '\\' && p
[2] == '\n')
/* Don't bother warning about unterminated comments
since that will happen later. Just be sure to exit. */
if (p
[1] == '\\' && p
[2] == '\n')
if (*p
== '*' && p
[1] == '/') {
else if (cplusplus
&& p
[1] == '/') {
while (*p
&& *p
++ != '\n') ;
warning ("text following #else or #endif violates ANSI standard");
* Skip a comment, assuming the input ptr immediately follows the
* initial slash-star. Bump line counter as necessary.
* (The canonical line counter is &ip->lineno).
* Don't use this routine (or the next one) if bumping the line
* counter is not sufficient to deal with newlines in the string.
skip_to_end_of_comment (ip
, line_counter
)
int *line_counter
; /* place to remember newlines, or NULL */
register U_CHAR
*limit
= ip
->buf
+ ip
->length
;
register U_CHAR
*bp
= ip
->bufp
;
FILE_BUF
*op
= &outbuf
; /* JF */ int output
= put_out_comments
&& !line_counter
;
/* JF this line_counter stuff is a crock to make sure the
comment is only put out once, no matter how many times
the comment is skipped. It almost works */
if (cplusplus
&& bp
[-1] == '/') {
if ((*op
->bufp
++ = *bp
++) == '\n') {
if (line_counter
!= NULL
)
if (*bp
== '\\' && bp
[1] == '\n')
* Skip over a quoted string. BP points to the opening quote.
* Returns a pointer after the closing quote. Don't go past LIMIT.
* START_LINE is the line number of the starting point (but it need
* not be valid if the starting point is inside a macro expansion).
* The input stack state is not changed.
* If COUNT_NEWLINES is nonzero, it points to an int to increment
* for each newline passed.
* If BACKSLASH_NEWLINES_P is nonzero, store 1 thru it
* if we pass a backslash-newline.
* If EOFP is nonzero, set *EOFP to 1 if the string is unterminated.
skip_quoted_string (bp
, limit
, start_line
, count_newlines
, backslash_newlines_p
, eofp
)
int *backslash_newlines_p
;
register U_CHAR c
, match
;
error_with_line (line_for_error (start_line
),
"unterminated string or character constant");
while (*bp
== '\\' && bp
[1] == '\n') {
if (backslash_newlines_p
)
*backslash_newlines_p
= 1;
if (*bp
== '\n' && count_newlines
) {
if (backslash_newlines_p
)
*backslash_newlines_p
= 1;
/* Unterminated strings and character constants are 'legal'. */
bp
--; /* Don't consume the newline. */ error_with_line (line_for_error (start_line
),
"unterminated character constant");
if (traditional
) { /* Unterminated strings are 'legal'. */
/* If not traditional, then allow newlines inside strings. */
* write out a #line command, for instance, after an #include file.
* If CONDITIONAL is nonzero, we can omit the #line if it would
* appear to be a no-op, and we can output a few newlines instead
* if we want to increase the line number by a small amount.
* FILE_CHANGE says whether we are entering a file, leaving, or neither.
output_line_command (ip
, op
, conditional
, file_change
)
enum file_change_code file_change
;
if (ip
->lineno
== op
->lineno
)
/* If the inherited line number is a little too small,
output some newlines instead of a #line command. */
if (ip
->lineno
> op
->lineno
&& ip
->lineno
< op
->lineno
+ 8) {
while (ip
->lineno
> op
->lineno
) {
#ifdef OUTPUT_LINE_COMMANDS
sprintf (line_cmd_buf
, "#line %d \"%s\"", ip
->lineno
, ip
->fname
);
sprintf (line_cmd_buf
, "# %d \"%s\"", ip
->lineno
, ip
->fname
);
if (file_change
!= same_file
)
strcat (line_cmd_buf
, file_change
== enter_file
? " 1" : " 2");
len
= strlen (line_cmd_buf
); line_cmd_buf
[len
++] = '\n'; check_expand (op
, len
+ 1);
if (op
->bufp
> op
->buf
&& op
->bufp
[-1] != '\n')
bcopy (line_cmd_buf
, op
->bufp
, len
);
/* This structure represents one parsed argument in a macro call.
`raw' points to the argument text as written (`raw_length' is its length).
`expanded' points to the argument's macro-expansion
(its length is `expand_length').
`stringified_length' is the length the argument would have
`free1' and `free2', if nonzero, point to blocks to be freed
when the macro argument data is no longer needed. */
int raw_length
, expand_length
;
HP points to the symbol that is the macro being called.
Put the result of expansion onto the input stack
so that subsequent input by our caller will use it.
If macro wants arguments, caller has already verified that
an argument list follows; arguments come from the input stack. */
DEFINITION
*defn
= hp
->value
.defn
; int start_line
= instack
[indepth
].lineno
;
/* it might not actually be a macro. */
if (hp
->type
!= T_MACRO
) {
args
= (struct argdata
*) alloca ((nargs
+ 1) * sizeof (struct argdata
)); for (i
= 0; i
< nargs
; i
++) {
args
[i
].raw
= args
[i
].expanded
= (U_CHAR
*) ""; args
[i
].raw_length
= args
[i
].expand_length
= args
[i
].stringified_length
= 0;
args
[i
].free1
= args
[i
].free2
= 0; /* Parse all the macro args that are supplied. I counts them.
The first NARGS args are stored in ARGS.
The rest are discarded. */
/* Discard the open-parenthesis or comma before the next arg. */
= macarg ((i
< nargs
|| (nargs
== 0 && i
== 0)) ? &args
[i
] : 0);
error_with_line (line_for_error (start_line
), parse_error
);
} while (*instack
[indepth
].bufp
!= ')');
/* If we got one arg but it was just whitespace, call that 0 args. */
register U_CHAR
*bp
= args
[0].raw
;
register U_CHAR
*lim
= bp
+ args
[0].raw_length
;
while (bp
!= lim
&& is_space
[*bp
]) bp
++;
error ("arguments given to macro `%s'", hp
->name
);
/* traditional C allows foo() if foo wants one argument. */
if (nargs
== 1 && i
== 0 && traditional
)
error ("no args to macro `%s'", hp
->name
);
error ("only 1 arg to macro `%s'", hp
->name
);
error ("only %d args to macro `%s'", i
, hp
->name
);
error ("too many (%d) args to macro `%s'", i
, hp
->name
);
/* Swallow the closeparen. */
/* If macro wants zero args, we parsed the arglist for checking only.
Read directly from the macro definition. */
register U_CHAR
*exp
= defn
->expansion
;
register int offset
; /* offset in expansion,
copied a piece at a time */
register int totlen
; /* total amount of exp buffer filled so far */
register struct reflist
*ap
;
/* Macro really takes args. Compute the expansion of this call. */
/* Compute length in characters of the macro's expansion. */
for (ap
= defn
->pattern
; ap
!= NULL
; ap
= ap
->next
) {
xbuf_len
+= args
[ap
->argno
].stringified_length
; else if (ap
->raw_before
|| ap
->raw_after
|| traditional
)
xbuf_len
+= args
[ap
->argno
].raw_length
; xbuf_len
+= args
[ap
->argno
].expand_length
; xbuf
= (U_CHAR
*) xmalloc (xbuf_len
+ 1); /* Generate in XBUF the complete expansion
with arguments substituted in.
TOTLEN is the total size generated so far.
OFFSET is the index in the definition
of where we are copying from. */
for (ap
= defn
->pattern
; ap
!= NULL
; ap
= ap
->next
) {
register struct argdata
*arg
= &args
[ap
->argno
];
for (i
= 0; i
< ap
->nchars
; i
++)
xbuf
[totlen
++] = exp
[offset
++]; if (ap
->stringify
!= 0) {
int arglen
= arg
->raw_length
;
&& (c
= arg
->raw
[i
], is_space
[c
]))
&& (c
= arg
->raw
[arglen
- 1], is_space
[c
]))
xbuf
[totlen
++] = '\"'; /* insert beginning quote */ for (; i
< arglen
; i
++) {
/* Special markers Newline Space
generate nothing for a stringified argument. */
if (c
== '\n' && arg
->raw
[i
+1] != '\n') {
/* Internal sequences of whitespace are replaced by one space. */
if (c
== '\n' ? arg
->raw
[i
+1] == '\n' : is_space
[c
]) {
/* Note that Newline Space does occur within whitespace
sequences; consider it part of the sequence. */
if (c
== '\n' && is_space
[arg
->raw
[i
+1]])
else if (c
!= '\n' && is_space
[c
])
} else if (c
== '\"' || c
== '\'')
if (c
== '\"' || (in_string
&& c
== '\\'))
sprintf ((char *) &xbuf
[totlen
], "\\%03o", (unsigned int) c
);
xbuf
[totlen
++] = '\"'; /* insert ending quote */ } else if (ap
->raw_before
|| ap
->raw_after
|| traditional
) {
U_CHAR
*l1
= p1
+ arg
->raw_length
; while (p1
!= l1
&& is_space
[*p1
]) p1
++;
while (p1
!= l1
&& is_idchar
[*p1
])
/* Delete any no-reexpansion marker that follows
an identifier at the beginning of the argument
if the argument is concatenated with what precedes it. */
if (p1
[0] == '\n' && p1
[1] == '-')
/* Arg is concatenated after: delete trailing whitespace,
whitespace markers, and no-reexpansion markers. */
if (is_space
[l1
[-1]]) l1
--;
else if (l1
[-1] == '-') {
/* If a `-' is preceded by an odd number of newlines then it
and the last newline are a no-reexpansion marker. */
while (p2
!= p1
&& p2
[-1] == '\n') p2
--;
bcopy (p1
, xbuf
+ totlen
, l1
- p1
);
bcopy (arg
->expanded
, xbuf
+ totlen
, arg
->expand_length
);
totlen
+= arg
->expand_length
; /* if there is anything left of the definition
after handling the arg list, copy that in too. */
for (i
= offset
; i
< defn
->length
; i
++)
for (i
= 0; i
< nargs
; i
++) {
/* Now put the expansion on the input stack
so our caller will commence reading from it. */
ip2
= &instack
[++indepth
]; ip2
->free_ptr
= (nargs
> 0) ? xbuf
: 0; ip2
->if_stack
= if_stack
; /* Recursive macro use sometimes works traditionally.
#define foo(x,y) bar(x(y,0), y)
* Parse a macro argument and store the info on it into *ARGPTR.
* Return nonzero to indicate a syntax error.
register struct argdata
*argptr
;
FILE_BUF
*ip
= &instack
[indepth
]; /* Try to parse as much of the argument as exists at this
U_CHAR
*bp
= macarg1 (ip
->bufp
, ip
->buf
+ ip
->length
, &paren
, &newlines
, &comments
);
/* If we find the end of the argument at this level,
set up *ARGPTR to point at it in the input stack. */
if (!(ip
->fname
!= 0 && (newlines
!= 0 || comments
!= 0))
&& bp
!= ip
->buf
+ ip
->length
) {
argptr
->raw_length
= bp
- ip
->bufp
; /* This input stack level ends before the macro argument does.
We must pop levels and keep parsing.
Therefore, we must allocate a temporary buffer and copy
the macro argument into it. */
int bufsize
= bp
- ip
->bufp
;
U_CHAR
*buffer
= (U_CHAR
*) xmalloc (bufsize
+ extra
+ 1); bcopy (ip
->bufp
, buffer
, bufsize
);
while (bp
== ip
->buf
+ ip
->length
) {
if (instack
[indepth
].macro
== 0) {
return "unterminated macro call";
ip
->macro
->type
= T_MACRO
; ip
= &instack
[--indepth
]; bp
= macarg1 (ip
->bufp
, ip
->buf
+ ip
->length
, &paren
, bufsize
+= bp
- ip
->bufp
; buffer
= (U_CHAR
*) xrealloc (buffer
, bufsize
+ extra
+ 1); bcopy (ip
->bufp
, buffer
+ bufsize
- (bp
- ip
->bufp
), bp
- ip
->bufp
);
/* Now, if arg is actually wanted, record its raw form,
discarding comments and duplicating newlines in whatever
part of it did not come from a macro expansion.
EXTRA space has been preallocated for duplicating the newlines.
FINAL_START is the index of the start of that part. */
argptr
->raw_length
= bufsize
; argptr
->newlines
= newlines
; argptr
->comments
= comments
; if ((newlines
|| comments
) && ip
->fname
!= 0)
discard_comments (argptr
->raw
+ final_start
,
argptr
->raw_length
- final_start
, argptr
->raw
[argptr
->raw_length
] = 0; if (argptr
->raw_length
> bufsize
+ extra
)
/* If we are not discarding this argument,
macroexpand it and compute its length as stringified.
All this info goes into *ARGPTR. */
register U_CHAR
*buf
, *lim
;
obuf
= expand_to_temp_buffer (argptr
->raw
, argptr
->raw
+ argptr
->raw_length
, argptr
->expanded
= obuf
.buf
; argptr
->expand_length
= obuf
.length
; argptr
->free2
= obuf
.buf
; lim
= buf
+ argptr
->raw_length
; /* If ANSI, discard leading and trailing space. */
while (buf
!= lim
&& is_space
[*buf
])
while (buf
!= lim
&& is_space
[lim
[-1]])
totlen
= traditional
? 0 : 2; /* Count opening and closing quote. */ register U_CHAR c
= *buf
++;
/* If ANSI, replace internal sequences of whitespace with one space. */
if (is_space
[c
] && !traditional
)
SKIP_ALL_WHITE_SPACE (buf
);
else if (c
== '\"' || c
== '\\') /* escape these chars */
argptr
->stringified_length
= totlen
;/* Scan text from START (inclusive) up to LIMIT (exclusive),
counting parens in *DEPTHPTR,
and return if reach LIMIT
or before a `)' that would make *DEPTHPTR negative
or before a comma when *DEPTHPTR is zero.
Single and double quotes are matched and termination
is inhibited within them. Comments also inhibit it.
Value returned is pointer to stopping place.
Increment *NEWLINES each time a newline is passed.
Set *COMMENTS to 1 if a comment is seen. */
macarg1 (start
, limit
, depthptr
, newlines
, comments
)
int *depthptr
, *newlines
, *comments
;
register U_CHAR
*bp
= start
;
/* Traditionally, backslash makes following char not special. */
/* But count source lines anyway. */
if (bp
[1] == '\\' && bp
[2] == '\n')
if (cplusplus
&& bp
[1] == '/') {
while (bp
< limit
&& *bp
++ != '\n') ;
if (bp
[1] != '*' || bp
+ 1 >= limit
)
&& bp
[1] == '\\' && bp
[2] == '\n')
if (bp
[0] == '*' && bp
[1] == '/')
if (*bp
== '\n') ++*newlines
;
for (quotec
= *bp
++; bp
+ 1 < limit
&& *bp
!= quotec
; bp
++) {
while (*bp
== '\\' && bp
[1] == '\n') {
} else if (*bp
== '\n') {
/* Discard comments and duplicate newlines
in the string of length LENGTH at START,
except inside of string constants.
The string is copied into itself with its beginning staying fixed.
NEWLINES is the number of newlines that must be duplicated.
We assume that that much extra space is available past the end
discard_comments (start
, length
, newlines
)
/* If we have newlines to duplicate, copy everything
that many characters up. Then, in the second part,
we will have room to insert the newlines
NEWLINES may actually be too large, because it counts
newlines in string constants, and we don't duplicate those.
But that does no harm. */
limit
= start
+ length
+ newlines
; /* Duplicate the newline. */
if (*ibp
== '\\' && ibp
[1] == '\n')
/* Delete any comment. */
if (cplusplus
&& ibp
[0] == '/') {
while (ibp
< limit
&& *ibp
++ != '\n') ;
if (ibp
[0] != '*' || ibp
+ 1 >= limit
)
while (ibp
+ 1 < limit
) {
&& ibp
[1] == '\\' && ibp
[2] == '\n')
if (ibp
[0] == '*' && ibp
[1] == '/')
/* Notice and skip strings, so that we don't
think that comments start inside them,
and so we don't duplicate newlines in them. */
if (c
== '\n' && quotec
== '\'')
if (c
== '\\' && ibp
< limit
) {
while (*ibp
== '\\' && ibp
[1] == '\n')
* error - print error message and increment count of errors.
error (msg
, arg1
, arg2
, arg3
)
for (i
= indepth
; i
>= 0; i
--)
if (instack
[i
].fname
!= NULL
) {
fprintf (stderr
, "%s:%d: ", ip
->fname
, ip
->lineno
);
fprintf (stderr
, msg
, arg1
, arg2
, arg3
);
/* Error including a message from `errno'. */
extern int errno
, sys_nerr
;
extern char *sys_errlist
[];
for (i
= indepth
; i
>= 0; i
--)
if (instack
[i
].fname
!= NULL
) {
fprintf (stderr
, "%s:%d: ", ip
->fname
, ip
->lineno
);
fprintf (stderr
, "%s: %s\n", name
, sys_errlist
[errno
]);
fprintf (stderr
, "%s: undocumented I/O error\n", name
);
/* Print error message but don't count it. */
warning (msg
, arg1
, arg2
, arg3
)
for (i
= indepth
; i
>= 0; i
--)
if (instack
[i
].fname
!= NULL
) {
fprintf (stderr
, "%s:%d: ", ip
->fname
, ip
->lineno
);
fprintf (stderr
, "warning: ");
fprintf (stderr
, msg
, arg1
, arg2
, arg3
);
error_with_line (line
, msg
, arg1
, arg2
, arg3
)
for (i
= indepth
; i
>= 0; i
--)
if (instack
[i
].fname
!= NULL
) {
fprintf (stderr
, "%s:%d: ", ip
->fname
, line
);
fprintf (stderr
, msg
, arg1
, arg2
, arg3
);
/* Return the line at which an error occurred.
The error is not necessarily associated with the current spot
in the input stack, so LINE says where. LINE will have been
copied from ip->lineno for the current input level.
If the current level is for a file, we return LINE.
But if the current level is not for a file, LINE is meaningless.
In that case, we return the lineno of the innermost file. */
for (i
= indepth
; i
>= 0; ) {
if (instack
[i
].fname
!= 0)
line1
= instack
[i
].lineno
; * If OBUF doesn't have NEEDED bytes after OPTR, make it bigger.
* As things stand, nothing is ever placed in the output buffer to be
* removed again except when it's KNOWN to be part of an identifier,
* so flushing and moving down everything left, instead of expanding,
grow_outbuf (obuf
, needed
)
if (obuf
->length
- (obuf
->bufp
- obuf
->buf
) > needed
)
/* Make it at least twice as big as it is now. */
/* Make it have at least 150% of the free space we will need. */
minsize
= (3 * needed
) / 2 + (obuf
->bufp
- obuf
->buf
); if (minsize
> obuf
->length
)
if ((p
= (U_CHAR
*) xrealloc (obuf
->buf
, obuf
->length
)) == NULL
)
obuf
->bufp
= p
+ (obuf
->bufp
- obuf
->buf
);/* Symbol table for macro names and special symbols */
* install a name in the main hash table, even if it is already there.
* name stops with first non alphanumeric, except leading '#'.
* caller must check against redefinition if that is desired.
* delete_macro () removes things installed by install () in fifo order.
* this is important because of the `defined' special symbol used
* in #if, and also if pushdef/popdef directives are ever implemented.
* If LEN is >= 0, it is the length of the name.
* Otherwise, compute the length by scanning the entire name.
* If HASH is >= 0, it is the precomputed hash code.
* Otherwise, compute the hash code.
install (name
, len
, type
, value
, hash
)
/* watch out here if sizeof (U_CHAR *) != sizeof (int) */
hash
= hashf (name
, len
, HASHSIZE
); i
= sizeof (HASHNODE
) + len
+ 1; hp
= (HASHNODE
*) xmalloc (i
); hp
->bucket_hdr
= &hashtab
[bucket
]; hp
->next
= hashtab
[bucket
]; hp
->name
= ((U_CHAR
*) hp
) + sizeof (HASHNODE
); for (i
= 0; i
< len
; i
++)
* find the most recent hash node for name name (ending with first
* non-identifier char) installed by install
* If LEN is >= 0, it is the length of the name.
* Otherwise, compute the length by scanning the entire name.
* If HASH is >= 0, it is the precomputed hash code.
* Otherwise, compute the hash code.
register HASHNODE
*bucket
;
for (bp
= name
; is_idchar
[*bp
]; bp
++) ;
hash
= hashf (name
, len
, HASHSIZE
); if (bucket
->length
== len
&& strncmp (bucket
->name
, name
, len
) == 0)
* Delete a hash node. Some weirdness to free junk from macros.
* More such weirdness will have to be added if you define more hash
/* Note that the DEFINITION of a macro is removed from the hash table
but its storage is not freed. This would be a storage leak
except that it is not reasonable to keep undefining and redefining
large numbers of macros many times.
In any case, this is necessary, because a macro can be #undef'd
in the middle of reading the arguments to a call to it.
If #undef freed the DEFINITION, that would crash. */
hp
->prev
->next
= hp
->next
; hp
->next
->prev
= hp
->prev
; /* make sure that the bucket chain header that
the deleted guy was on points to the right thing afterwards. */
if (hp
== *hp
->bucket_hdr
)
*hp
->bucket_hdr
= hp
->next
;
if (hp
->type
== T_MACRO
) {
DEFINITION
*d
= hp
->value
.defn
; struct reflist
*ap
, *nextap
;
for (ap
= d
->pattern
; ap
!= NULL
; ap
= nextap
) {
* return hash function on name. must be compatible with the one
* computed a step at a time, elsewhere
hashf (name
, len
, hashsize
)
r
= HASHSTEP (r
, *name
++); return MAKE_POS (r
) % hashsize
;
/* Dump all macro definitions as #defines to stdout. */
for (bucket
= 0; bucket
< HASHSIZE
; bucket
++) {
for (hp
= hashtab
[bucket
]; hp
; hp
= hp
->next
) {
if (hp
->type
== T_MACRO
) {
register DEFINITION
*defn
= hp
->value
.defn
;
/* Print the definition of the macro HP. */
printf ("#define %s", hp
->name
);
for (i
= 0; i
< defn
->nargs
; i
++) {
for (ap
= defn
->pattern
; ap
!= NULL
; ap
= ap
->next
) {
dump_defn_1 (defn
->expansion
, offset
, ap
->nchars
);
if (ap
->raw_before
&& !concat
)
dump_arg_n (defn
, ap
->argno
);
dump_defn_1 (defn
->expansion
, offset
, defn
->length
- offset
);
/* Output to stdout a substring of a macro definition.
BASE is the beginning of the definition.
Output characters START thru LENGTH.
Discard newlines outside of strings, thus
converting funny-space markers to ordinary spaces. */
dump_defn_1 (base
, start
, length
)
U_CHAR
*p
= base
+ start
; U_CHAR
*limit
= base
+ start
+ length
; else if (*p
== '\"' || *p
=='\'') {
U_CHAR
*p1
= skip_quoted_string (p
, limit
, 0, 0, 0, 0); fwrite (p
, p1
- p
, 1, stdout
);
/* Print the name of argument number ARGNUM of macro definition DEFN.
Recall that DEFN->argnames contains all the arg names
concatenated in reverse order with comma-space in between. */
dump_arg_n (defn
, argnum
)
register U_CHAR
*p
= defn
->argnames
;
while (argnum
+ 1 < defn
->nargs
) {
p
= (U_CHAR
*) index (p
, ' ') + 1; while (*p
&& *p
!= ',') {
/* Initialize syntactic classifications of characters. */
initialize_char_syntax ()
* Set up is_idchar and is_idstart tables. These should be
* faster than saying (is_alpha (c) || c == '_'), etc.
* Must do set up these things before calling any routines tthat
for (i
= 'a'; i
<= 'z'; i
++) {
is_idchar
[i
- 'a' + 'A'] = 1; is_idstart
[i
- 'a' + 'A'] = 1; for (i
= '0'; i
<= '9'; i
++)
is_idchar
['$'] = dollars_in_ident
; is_idstart
['$'] = dollars_in_ident
; /* horizontal space table */
/* Initialize the built-in macros. */
install ("__LINE__", -1, T_SPECLINE
, 0, -1);
install ("__DATE__", -1, T_DATE
, 0, -1);
install ("__FILE__", -1, T_FILE
, 0, -1);
install ("__BASE_FILE__", -1, T_BASE_FILE
, 0, -1);
install ("__INCLUDE_LEVEL__", -1, T_INCLUDE_LEVEL
, 0, -1);
install ("__VERSION__", -1, T_VERSION
, 0, -1);
install ("__TIME__", -1, T_TIME
, 0, -1);
install ("__STDC__", -1, T_CONST
, STDC_VALUE
, -1);
/* install ("__GNU__", -1, T_CONST, 1, -1); */
/* This is supplied using a -D by the compiler driver
so that it is present only when truly compiling with GNU C. */
* process a given definition string, for initialization
* If STR is just an identifier, define it with value 1.
* If STR has anything after the identifier, then it should
* be identifier-space-definition.
while (is_idchar
[*p
]) p
++;
error ("malformed option `-D %s'", str
);
buf
= (U_CHAR
*) alloca (p
- buf
+ 4); strcpy ((char *)buf
, str
);
strcat ((char *)buf
, " 1");
error ("malformed option `-D %s'", str
);
/* Copy the entire option so we can modify it. */
buf
= (U_CHAR
*) alloca (2 * strlen (str
) + 1); strncpy (buf
, str
, p
- str
);
/* Change the = to a space. */
/* Scan for any backslash-newline and remove it. */
if (*p
== '\\' && p
[1] == '\n')
/* Change newline chars into newline-markers. */
ip
= &instack
[++indepth
]; ip
->fname
= "*Initialization*"; ip
->buf
= ip
->bufp
= buf
; ip
->length
= strlen (buf
); for (kt
= directive_table
; kt
->type
!= T_DEFINE
; kt
++)
/* pass NULL as output ptr to do_define since we KNOW it never
do_define (buf
, buf
+ strlen (buf
) , NULL
, kt
);
/* JF, this does the work for the -U option */
ip
= &instack
[++indepth
]; ip
->buf
= ip
->bufp
= str
; ip
->length
= strlen (str
); for (kt
= directive_table
; kt
->type
!= T_UNDEF
; kt
++)
do_undef (str
,str
+ strlen (str
) - 1, NULL
, kt
);
/* Add output to `deps_buffer' for the -M switch.
STRING points to the text to be output.
SIZE is the number of bytes, or 0 meaning output until a null.
If SIZE is nonzero, we break the line first, if it is long enough. */
deps_output (string
, size
)
#ifndef MAX_OUTPUT_COLUMNS
#define MAX_OUTPUT_COLUMNS 75
if (size
!= 0 && deps_column
!= 0
&& size
+ deps_column
> MAX_OUTPUT_COLUMNS
) {
deps_output ("\\\n ", 0);
if (deps_size
+ size
+ 1 > deps_allocated_size
) {
deps_allocated_size
= deps_size
+ size
+ 50; deps_allocated_size
*= 2; deps_buffer
= (char *) xrealloc (deps_buffer
, deps_allocated_size
); bcopy (string
, &deps_buffer
[deps_size
], size
);
deps_buffer
[deps_size
] = 0; while (length
> max_str
) {
(void) LIB$
MOVC5 (&zero
, &zero
, &zero
, &max_str
, b
);
(void) LIB$
MOVC5 (&zero
, &zero
, &zero
, &length
, b
);
while (length
> max_str
) {
(void) LIB$
MOVC3 (&max_str
, b1
, b2
);
(void) LIB$
MOVC3 (&length
, b1
, b2
);
bcmp (b1
, b2
, length
) /* This could be a macro! */
struct dsc$descriptor_s src1
= {length
, DSC$K_DTYPE_T
, DSC$K_CLASS_S
, b1
};
struct dsc$descriptor_s src2
= {length
, DSC$K_DTYPE_T
, DSC$K_CLASS_S
, b2
};
return STR$
COMPARE (&src1
, &src2
);
fprintf (stderr
, "%s: ", progname
);
fprintf (stderr
, str
, arg
);
/* More 'friendly' abort that prints the line and file.
config.h can #define abort fancy_abort if you like that sort of thing. */
fatal ("Internal gcc abort.");
extern int errno
, sys_nerr
;
extern char *sys_errlist
[];
fprintf (stderr
, "%s: ", progname
);
fprintf (stderr
, "%s: %s\n", name
, sys_errlist
[errno
]);
fprintf (stderr
, "%s: undocumented I/O error\n", name
);
fatal ("Memory exhausted.");
register char *ptr
= malloc (size
);
if (ptr
!= 0) return (ptr
);
register char *ptr
= realloc (old
, size
);
if (ptr
!= 0) return (ptr
);
register int total
= number
* size
;
register char *ptr
= malloc (total
);
/* It's not too long, so loop, zeroing by longs.
It must be safe because malloc values are always well aligned. */
register long *zp
= (long *) ptr
;
register long *zl
= (long *) (ptr
+ total
- 4);
register int i
= total
- 4;
int size
= strlen (input
);
char *output
= xmalloc (size
+ 1);
/* Get the file-mode and data size of the file open on FD
and store them in *MODE_POINTER and *SIZE_POINTER. */
file_size_and_mode (fd
, mode_pointer
, size_pointer
)
if (fstat (fd
, &sbuf
) < 0) return (-1);
if (mode_pointer
) *mode_pointer
= sbuf
.st_mode
;
if (size_pointer
) *size_pointer
= sbuf
.st_size
;
/* Under VMS we need to fix up the "include" specification
filename so that everything following the 1st slash is
changed into its correct VMS file specification. */
hack_vms_include_specification (fname
)
register char *cp
, *cp1
, *cp2
;
extern char *index (), *rindex ();
/* Ignore leading "./"s */
while (fname
[0] == '.' && fname
[1] == '/')
/* Look for the boundary between the VMS and UNIX filespecs */
cp
= rindex (fname
, ']'); /* Look for end of dirspec. */ if (cp
== 0) cp
== rindex (fname
, '>'); /* ... Ditto */
if (cp
== 0) cp
== rindex (fname
, ':'); /* Look for end of devspec. */
cp
= index (fname
, '/'); /* Look for the "/" */ /* See if we found that 1st slash */
if (cp
== 0) return; /* Nothing to do!!! */
if (*cp
!= '/') return; /* Nothing to do!!! */
/* Point to the UNIX filename part (which needs to be fixed!) */
/* If the directory spec is not rooted, we can just copy
the UNIX filename part and we are done */
&& ((cp
[-1] == ']') || (cp
[-1] == '>'))
/* If there are no other slashes then the filename will be
in the "root" directory. Otherwise, we need to add
directory specifications. */
if (index (cp1
, '/') == 0) {
/* Just add "[000000]" as the directory string */
strcpy (Local
, "[000000]");
cp2
= Local
+ strlen (Local
); /* Open the directory specification */
/* As long as there are still subdirectories to add, do them. */
while (index (cp1
, '/') != 0) {
/* If this token is "." we can ignore it */
if ((cp1
[0] == '.') && (cp1
[1] == '/')) {
/* Add a subdirectory spec. */
if (cp2
!= Local
+1) *cp2
++ = '.';
/* If this is ".." then the spec becomes "-" */
if ((cp1
[0] == '.') && (cp1
[1] == '.') && (cp
[2] == '/')) {
/* Add "-" and skip the ".." */
/* Copy the subdirectory */
while (*cp1
!= '/') *cp2
++= *cp1
++;
cp1
++; /* Skip the "/" */ /* Close the directory specification */
/* Now add the filename */
while (*cp1
) *cp2
++ = *cp1
++;
/* Now append it to the original VMS spec. */
/* These are the read/write replacement routines for
VAX-11 "C". They make read/write behave enough
like their UNIX counterparts that CCCP will work */
#undef read /* Get back the REAL read routine */
/* Read until the buffer is exhausted */
/* Limit each read to 32KB */
i
= (size
> (32*1024)) ? (32*1024) : size
; if (i
== 0) return (total
);
/* Account for this read */
#undef write /* Get back the REAL write routine */
/* Limit individual writes to 32Kb */
j
= (i
> (32*1024)) ? (32*1024) : i
; if (write (fd
, buf
, j
) < 0) return (-1);
/* Account for the data written */
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