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third-party/demangle/libiberty.h vendored Normal file
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/* Function declarations for libiberty.
Copyright (C) 1997-2021 Free Software Foundation, Inc.
Note - certain prototypes declared in this header file are for
functions whoes implementation copyright does not belong to the
FSF. Those prototypes are present in this file for reference
purposes only and their presence in this file should not construed
as an indication of ownership by the FSF of the implementation of
those functions in any way or form whatsoever.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA.
Written by Cygnus Support, 1994.
The libiberty library provides a number of functions which are
missing on some operating systems. We do not declare those here,
to avoid conflicts with the system header files on operating
systems that do support those functions. In this file we only
declare those functions which are specific to libiberty. */
#ifndef LIBIBERTY_H
#define LIBIBERTY_H
#ifdef __cplusplus
extern "C" {
#endif
#include "ansidecl.h"
/* Get a definition for size_t. */
#include <stddef.h>
/* Get a definition for va_list. */
#include <stdarg.h>
#include <stdio.h>
/* If the OS supports it, ensure that the supplied stream is setup to
avoid any multi-threaded locking. Otherwise leave the FILE pointer
unchanged. If the stream is NULL do nothing. */
extern void unlock_stream (FILE *);
/* If the OS supports it, ensure that the standard I/O streams, stdin,
stdout and stderr are setup to avoid any multi-threaded locking.
Otherwise do nothing. */
extern void unlock_std_streams (void);
/* Open and return a FILE pointer. If the OS supports it, ensure that
the stream is setup to avoid any multi-threaded locking. Otherwise
return the FILE pointer unchanged. */
extern FILE *fopen_unlocked (const char *, const char *);
extern FILE *fdopen_unlocked (int, const char *);
extern FILE *freopen_unlocked (const char *, const char *, FILE *);
/* Build an argument vector from a string. Allocates memory using
malloc. Use freeargv to free the vector. */
extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
/* Free a vector returned by buildargv. */
extern void freeargv (char **);
/* Duplicate an argument vector. Allocates memory using malloc. Use
freeargv to free the vector. */
extern char **dupargv (char * const *) ATTRIBUTE_MALLOC;
/* Expand "@file" arguments in argv. */
extern void expandargv (int *, char ***);
/* Write argv to an @-file, inserting necessary quoting. */
extern int writeargv (char * const *, FILE *);
/* Return the number of elements in argv. */
extern int countargv (char * const *);
/* A well-defined basename () that is always compiled in. */
extern const char *lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
/* Same, but assumes DOS semantics (drive name, backslash is also a
dir separator) regardless of host. */
extern const char *dos_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
/* Same, but assumes Unix semantics (absolute paths always start with
a slash, only forward slash is accepted as dir separator)
regardless of host. */
extern const char *unix_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
/* A well-defined realpath () that is always compiled in. */
extern char *lrealpath (const char *);
/* Return true when FD file descriptor exists. */
extern int is_valid_fd (int fd);
/* Concatenate an arbitrary number of strings. You must pass NULL as
the last argument of this function, to terminate the list of
strings. Allocates memory using xmalloc. */
extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
/* Concatenate an arbitrary number of strings. You must pass NULL as
the last argument of this function, to terminate the list of
strings. Allocates memory using xmalloc. The first argument is
not one of the strings to be concatenated, but if not NULL is a
pointer to be freed after the new string is created, similar to the
way xrealloc works. */
extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
/* Determine the length of concatenating an arbitrary number of
strings. You must pass NULL as the last argument of this function,
to terminate the list of strings. */
extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
/* Concatenate an arbitrary number of strings into a SUPPLIED area of
memory. You must pass NULL as the last argument of this function,
to terminate the list of strings. The supplied memory is assumed
to be large enough. */
extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;
/* Concatenate an arbitrary number of strings into a GLOBAL area of
memory. You must pass NULL as the last argument of this function,
to terminate the list of strings. The supplied memory is assumed
to be large enough. */
extern char *concat_copy2 (const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
/* This is the global area used by concat_copy2. */
extern char *libiberty_concat_ptr;
/* Concatenate an arbitrary number of strings. You must pass NULL as
the last argument of this function, to terminate the list of
strings. Allocates memory using alloca. The arguments are
evaluated twice! */
#define ACONCAT(ACONCAT_PARAMS) \
(libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
concat_copy2 ACONCAT_PARAMS)
/* Check whether two file descriptors refer to the same file. */
extern int fdmatch (int fd1, int fd2);
/* Return the position of the first bit set in the argument. */
/* Prototypes vary from system to system, so we only provide a
prototype on systems where we know that we need it. */
#if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
extern int ffs(int);
#endif
/* Get the working directory. The result is cached, so don't call
chdir() between calls to getpwd(). */
extern char * getpwd (void);
/* Get the current time. */
/* Prototypes vary from system to system, so we only provide a
prototype on systems where we know that we need it. */
#ifdef __MINGW32__
/* Forward declaration to avoid #include <sys/time.h>. */
struct timeval;
extern int gettimeofday (struct timeval *, void *);
#endif
/* Get the amount of time the process has run, in microseconds. */
extern long get_run_time (void);
/* Generate a relocated path to some installation directory. Allocates
return value using malloc. */
extern char *make_relative_prefix (const char *, const char *,
const char *) ATTRIBUTE_MALLOC;
/* Generate a relocated path to some installation directory without
attempting to follow any soft links. Allocates
return value using malloc. */
extern char *make_relative_prefix_ignore_links (const char *, const char *,
const char *) ATTRIBUTE_MALLOC;
/* Returns a pointer to a directory path suitable for creating temporary
files in. */
extern const char *choose_tmpdir (void) ATTRIBUTE_RETURNS_NONNULL;
/* Choose a temporary directory to use for scratch files. */
extern char *choose_temp_base (void) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
/* Return a temporary file name or NULL if unable to create one. */
extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
/* Return a temporary file name with given PREFIX and SUFFIX
or NULL if unable to create one. */
extern char *make_temp_file_with_prefix (const char *, const char *) ATTRIBUTE_MALLOC;
/* Remove a link to a file unless it is special. */
extern int unlink_if_ordinary (const char *);
/* Allocate memory filled with spaces. Allocates using malloc. */
extern const char *spaces (int count);
/* Return the maximum error number for which strerror will return a
string. */
extern int errno_max (void);
/* Return the name of an errno value (e.g., strerrno (EINVAL) returns
"EINVAL"). */
extern const char *strerrno (int);
/* Given the name of an errno value, return the value. */
extern int strtoerrno (const char *);
/* ANSI's strerror(), but more robust. */
extern char *xstrerror (int) ATTRIBUTE_RETURNS_NONNULL;
/* Return the maximum signal number for which strsignal will return a
string. */
extern int signo_max (void);
/* Return a signal message string for a signal number
(e.g., strsignal (SIGHUP) returns something like "Hangup"). */
/* This is commented out as it can conflict with one in system headers.
We still document its existence though. */
/*extern const char *strsignal (int);*/
/* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
"SIGHUP"). */
extern const char *strsigno (int);
/* Given the name of a signal, return its number. */
extern int strtosigno (const char *);
/* Register a function to be run by xexit. Returns 0 on success. */
extern int xatexit (void (*fn) (void));
/* Exit, calling all the functions registered with xatexit. */
extern void xexit (int status) ATTRIBUTE_NORETURN;
/* Set the program name used by xmalloc. */
extern void xmalloc_set_program_name (const char *);
/* Report an allocation failure. */
extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
/* Allocate memory without fail. If malloc fails, this will print a
message to stderr (using the name set by xmalloc_set_program_name,
if any) and then call xexit. */
extern void *xmalloc (size_t) ATTRIBUTE_MALLOC;
/* Reallocate memory without fail. This works like xmalloc. Note,
realloc type functions are not suitable for attribute malloc since
they may return the same address across multiple calls. */
extern void *xrealloc (void *, size_t);
/* Allocate memory without fail and set it to zero. This works like
xmalloc. */
extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
/* Copy a string into a memory buffer without fail. */
extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
/* Copy at most N characters from string into a buffer without fail. */
extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
/* Copy an existing memory buffer to a new memory buffer without fail. */
extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC;
/* Physical memory routines. Return values are in BYTES. */
extern double physmem_total (void);
extern double physmem_available (void);
/* Compute the 32-bit CRC of a block of memory. */
extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
/* These macros provide a K&R/C89/C++-friendly way of allocating structures
with nice encapsulation. The XDELETE*() macros are technically
superfluous, but provided here for symmetry. Using them consistently
makes it easier to update client code to use different allocators such
as new/delete and new[]/delete[]. */
/* Scalar allocators. */
#define XALLOCA(T) ((T *) alloca (sizeof (T)))
#define XNEW(T) ((T *) xmalloc (sizeof (T)))
#define XCNEW(T) ((T *) xcalloc (1, sizeof (T)))
#define XDUP(T, P) ((T *) xmemdup ((P), sizeof (T), sizeof (T)))
#define XDELETE(P) free ((void*) (P))
/* Array allocators. */
#define XALLOCAVEC(T, N) ((T *) alloca (sizeof (T) * (N)))
#define XNEWVEC(T, N) ((T *) xmalloc (sizeof (T) * (N)))
#define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T)))
#define XDUPVEC(T, P, N) ((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N)))
#define XRESIZEVEC(T, P, N) ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
#define XDELETEVEC(P) free ((void*) (P))
/* Allocators for variable-sized structures and raw buffers. */
#define XALLOCAVAR(T, S) ((T *) alloca ((S)))
#define XNEWVAR(T, S) ((T *) xmalloc ((S)))
#define XCNEWVAR(T, S) ((T *) xcalloc (1, (S)))
#define XDUPVAR(T, P, S1, S2) ((T *) xmemdup ((P), (S1), (S2)))
#define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S)))
/* Type-safe obstack allocator. */
#define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T)))
#define XOBNEWVEC(O, T, N) ((T *) obstack_alloc ((O), sizeof (T) * (N)))
#define XOBNEWVAR(O, T, S) ((T *) obstack_alloc ((O), (S)))
#define XOBFINISH(O, T) ((T) obstack_finish ((O)))
/* hex character manipulation routines */
#define _hex_array_size 256
#define _hex_bad 99
extern const unsigned char _hex_value[_hex_array_size];
extern void hex_init (void);
#define hex_p(c) (hex_value (c) != _hex_bad)
/* If you change this, note well: Some code relies on side effects in
the argument being performed exactly once. */
#define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)])
/* Flags for pex_init. These are bits to be or'ed together. */
/* Record subprocess times, if possible. */
#define PEX_RECORD_TIMES 0x1
/* Use pipes for communication between processes, if possible. */
#define PEX_USE_PIPES 0x2
/* Save files used for communication between processes. */
#define PEX_SAVE_TEMPS 0x4
/* Max number of alloca bytes per call before we must switch to malloc.
?? Swiped from gnulib's regex_internal.h header. Is this actually
the case? This number seems arbitrary, though sane.
The OS usually guarantees only one guard page at the bottom of the stack,
and a page size can be as small as 4096 bytes. So we cannot safely
allocate anything larger than 4096 bytes. Also care for the possibility
of a few compiler-allocated temporary stack slots. */
#define MAX_ALLOCA_SIZE 4032
/* Prepare to execute one or more programs, with standard output of
each program fed to standard input of the next.
FLAGS As above.
PNAME The name of the program to report in error messages.
TEMPBASE A base name to use for temporary files; may be NULL to
use a random name.
Returns NULL on error. */
extern struct pex_obj *pex_init (int flags, const char *pname,
const char *tempbase) ATTRIBUTE_RETURNS_NONNULL;
/* Flags for pex_run. These are bits to be or'ed together. */
/* Last program in pipeline. Standard output of program goes to
OUTNAME, or, if OUTNAME is NULL, to standard output of caller. Do
not set this if you want to call pex_read_output. After this is
set, pex_run may no longer be called with the same struct
pex_obj. */
#define PEX_LAST 0x1
/* Search for program in executable search path. */
#define PEX_SEARCH 0x2
/* OUTNAME is a suffix. */
#define PEX_SUFFIX 0x4
/* Send program's standard error to standard output. */
#define PEX_STDERR_TO_STDOUT 0x8
/* Input file should be opened in binary mode. This flag is ignored
on Unix. */
#define PEX_BINARY_INPUT 0x10
/* Output file should be opened in binary mode. This flag is ignored
on Unix. For proper behaviour PEX_BINARY_INPUT and
PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
PEX_BINARY_OUTPUT should be followed by a call using
PEX_BINARY_INPUT. */
#define PEX_BINARY_OUTPUT 0x20
/* Capture stderr to a pipe. The output can be read by
calling pex_read_err and reading from the returned
FILE object. This flag may be specified only for
the last program in a pipeline.
This flag is supported only on Unix and Windows. */
#define PEX_STDERR_TO_PIPE 0x40
/* Capture stderr in binary mode. This flag is ignored
on Unix. */
#define PEX_BINARY_ERROR 0x80
/* Append stdout to existing file instead of truncating it. */
#define PEX_STDOUT_APPEND 0x100
/* Thes same as PEX_STDOUT_APPEND, but for STDERR. */
#define PEX_STDERR_APPEND 0x200
/* Execute one program. Returns NULL on success. On error returns an
error string (typically just the name of a system call); the error
string is statically allocated.
OBJ Returned by pex_init.
FLAGS As above.
EXECUTABLE The program to execute.
ARGV NULL terminated array of arguments to pass to the program.
OUTNAME Sets the output file name as follows:
PEX_SUFFIX set (OUTNAME may not be NULL):
TEMPBASE parameter to pex_init not NULL:
Output file name is the concatenation of TEMPBASE
and OUTNAME.
TEMPBASE is NULL:
Output file name is a random file name ending in
OUTNAME.
PEX_SUFFIX not set:
OUTNAME not NULL:
Output file name is OUTNAME.
OUTNAME NULL, TEMPBASE not NULL:
Output file name is randomly chosen using
TEMPBASE.
OUTNAME NULL, TEMPBASE NULL:
Output file name is randomly chosen.
If PEX_LAST is not set, the output file name is the
name to use for a temporary file holding stdout, if
any (there will not be a file if PEX_USE_PIPES is set
and the system supports pipes). If a file is used, it
will be removed when no longer needed unless
PEX_SAVE_TEMPS is set.
If PEX_LAST is set, and OUTNAME is not NULL, standard
output is written to the output file name. The file
will not be removed. If PEX_LAST and PEX_SUFFIX are
both set, TEMPBASE may not be NULL.
ERRNAME If not NULL, this is the name of a file to which
standard error is written. If NULL, standard error of
the program is standard error of the caller.
ERR On an error return, *ERR is set to an errno value, or
to 0 if there is no relevant errno.
*/
extern const char *pex_run (struct pex_obj *obj, int flags,
const char *executable, char * const *argv,
const char *outname, const char *errname,
int *err);
/* As for pex_run (), but takes an extra parameter to enable the
environment for the child process to be specified.
ENV The environment for the child process, specified as
an array of character pointers. Each element of the
array should point to a string of the form VAR=VALUE,
with the exception of the last element which must be
a null pointer.
*/
extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
const char *executable,
char * const *argv,
char * const *env,
const char *outname,
const char *errname, int *err);
/* Return a stream for a temporary file to pass to the first program
in the pipeline as input. The file name is chosen as for pex_run.
pex_run closes the file automatically; don't close it yourself. */
extern FILE *pex_input_file (struct pex_obj *obj, int flags,
const char *in_name);
/* Return a stream for a pipe connected to the standard input of the
first program in the pipeline. You must have passed
`PEX_USE_PIPES' to `pex_init'. Close the returned stream
yourself. */
extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
/* Read the standard output of the last program to be executed.
pex_run cannot be called after this. BINARY should be non-zero if
the file should be opened in binary mode; this is ignored on Unix.
Returns NULL on error. Don't call fclose on the returned FILE; it
will be closed by pex_free. */
extern FILE *pex_read_output (struct pex_obj *, int binary);
/* Read the standard error of the last program to be executed.
pex_run cannot be called after this. BINARY should be non-zero if
the file should be opened in binary mode; this is ignored on Unix.
Returns NULL on error. Don't call fclose on the returned FILE; it
will be closed by pex_free. */
extern FILE *pex_read_err (struct pex_obj *, int binary);
/* Return exit status of all programs in VECTOR. COUNT indicates the
size of VECTOR. The status codes in the vector are in the order of
the calls to pex_run. Returns 0 on error, 1 on success. */
extern int pex_get_status (struct pex_obj *, int count, int *vector);
/* Return times of all programs in VECTOR. COUNT indicates the size
of VECTOR. struct pex_time is really just struct timeval, but that
is not portable to all systems. Returns 0 on error, 1 on
success. */
struct pex_time
{
unsigned long user_seconds;
unsigned long user_microseconds;
unsigned long system_seconds;
unsigned long system_microseconds;
};
extern int pex_get_times (struct pex_obj *, int count,
struct pex_time *vector);
/* Clean up a pex_obj. If you have not called pex_get_times or
pex_get_status, this will try to kill the subprocesses. */
extern void pex_free (struct pex_obj *);
/* Just execute one program. Return value is as for pex_run.
FLAGS Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
EXECUTABLE As for pex_run.
ARGV As for pex_run.
PNAME As for pex_init.
OUTNAME As for pex_run when PEX_LAST is set.
ERRNAME As for pex_run.
STATUS Set to exit status on success.
ERR As for pex_run.
*/
extern const char *pex_one (int flags, const char *executable,
char * const *argv, const char *pname,
const char *outname, const char *errname,
int *status, int *err);
/* pexecute and pwait are the old pexecute interface, still here for
backward compatibility. Don't use these for new code. Instead,
use pex_init/pex_run/pex_get_status/pex_free, or pex_one. */
/* Definitions used by the pexecute routine. */
#define PEXECUTE_FIRST 1
#define PEXECUTE_LAST 2
#define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST)
#define PEXECUTE_SEARCH 4
#define PEXECUTE_VERBOSE 8
/* Execute a program. */
extern int pexecute (const char *, char * const *, const char *,
const char *, char **, char **, int);
/* Wait for pexecute to finish. */
extern int pwait (int, int *, int);
/* Like bsearch, but takes and passes on an argument like qsort_r. */
extern void *bsearch_r (const void *, const void *,
size_t, size_t,
int (*)(const void *, const void *, void *),
void *);
#if defined(HAVE_DECL_ASPRINTF) && !HAVE_DECL_ASPRINTF
/* Like sprintf but provides a pointer to malloc'd storage, which must
be freed by the caller. */
extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
#endif
/* Like asprintf but allocates memory without fail. This works like
xmalloc. */
extern char *xasprintf (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF_1;
#if defined(HAVE_DECL_VASPRINTF) && !HAVE_DECL_VASPRINTF
/* Like vsprintf but provides a pointer to malloc'd storage, which
must be freed by the caller. */
extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
#endif
/* Like vasprintf but allocates memory without fail. This works like
xmalloc. */
extern char *xvasprintf (const char *, va_list) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF(1,0);
#if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
/* Like sprintf but prints at most N characters. */
extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
#endif
#if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
/* Like vsprintf but prints at most N characters. */
extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
#endif
#if defined (HAVE_DECL_STRNLEN) && !HAVE_DECL_STRNLEN
extern size_t strnlen (const char *, size_t);
#endif
#if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
/* Compare version strings. */
extern int strverscmp (const char *, const char *);
#endif
#if defined(HAVE_DECL_STRTOL) && !HAVE_DECL_STRTOL
extern long int strtol (const char *nptr,
char **endptr, int base);
#endif
#if defined(HAVE_DECL_STRTOUL) && !HAVE_DECL_STRTOUL
extern unsigned long int strtoul (const char *nptr,
char **endptr, int base);
#endif
#if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOLL) && !HAVE_DECL_STRTOLL
__extension__
extern long long int strtoll (const char *nptr,
char **endptr, int base);
#endif
#if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOULL) && !HAVE_DECL_STRTOULL
__extension__
extern unsigned long long int strtoull (const char *nptr,
char **endptr, int base);
#endif
#if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
/* Compare version strings. */
extern int strverscmp (const char *, const char *);
#endif
/* Set the title of a process */
extern void setproctitle (const char *name, ...);
/* Increase stack limit if possible. */
extern void stack_limit_increase (unsigned long);
#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
/* Drastically simplified alloca configurator. If we're using GCC,
we use __builtin_alloca; otherwise we use the C alloca. The C
alloca is always available. You can override GCC by defining
USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
also set/unset as it is often used to indicate whether code needs
to call alloca(0). */
extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
#undef alloca
#if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
# define alloca(x) __builtin_alloca(x)
# undef C_ALLOCA
# define ASTRDUP(X) \
(__extension__ ({ const char *const libiberty_optr = (X); \
const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
char *const libiberty_nptr = (char *) alloca (libiberty_len); \
(char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
#else
# define alloca(x) C_alloca(x)
# undef USE_C_ALLOCA
# define USE_C_ALLOCA 1
# undef C_ALLOCA
# define C_ALLOCA 1
extern const char *libiberty_optr;
extern char *libiberty_nptr;
extern unsigned long libiberty_len;
# define ASTRDUP(X) \
(libiberty_optr = (X), \
libiberty_len = strlen (libiberty_optr) + 1, \
libiberty_nptr = (char *) alloca (libiberty_len), \
(char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
#endif
#ifdef __cplusplus
}
#endif
#endif /* ! defined (LIBIBERTY_H) */