[deliverable/binutils-gdb.git] / include / libiberty.h

/* Function declarations for libiberty.

   Copyright 2001, 2002 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., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, 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"

#ifdef ANSI_PROTOTYPES
/* Get a definition for size_t.  */
#include <stddef.h>
/* Get a definition for va_list.  */
#include <stdarg.h>
#endif

/* Build an argument vector from a string.  Allocates memory using
   malloc.  Use freeargv to free the vector.  */

extern char **buildargv PARAMS ((const char *)) ATTRIBUTE_MALLOC;

/* Free a vector returned by buildargv.  */

extern void freeargv PARAMS ((char **));

/* Duplicate an argument vector. Allocates memory using malloc.  Use
   freeargv to free the vector.  */

extern char **dupargv PARAMS ((char **)) ATTRIBUTE_MALLOC;


/* Return the last component of a path name.  Note that we can't use a
   prototype here because the parameter is declared inconsistently
   across different systems, sometimes as "char *" and sometimes as
   "const char *" */

/* HAVE_DECL_* is a three-state macro: undefined, 0 or 1.  If it is
   undefined, we haven't run the autoconf check so provide the
   declaration without arguments.  If it is 0, we checked and failed
   to find the declaration so provide a fully prototyped one.  If it
   is 1, we found it so don't provide any declaration at all.  */
#if !HAVE_DECL_BASENAME
#if defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME)
extern char *basename PARAMS ((const char *));
#else
extern char *basename ();
#endif
#endif

/* A well-defined basename () that is always compiled in.  */

extern const char *lbasename PARAMS ((const char *));

/* A well-defined realpath () that is always compiled in.  */

extern char *lrealpath PARAMS ((const char *));

/* 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 PARAMS ((const char *, ...)) ATTRIBUTE_MALLOC 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 PARAMS ((char *, const char *, ...)) ATTRIBUTE_MALLOC 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 PARAMS ((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 PARAMS ((char *, const char *, ...)) 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 PARAMS ((const char *, ...)) 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 = alloca (concat_length ACONCAT_PARAMS + 1), \
   concat_copy2 ACONCAT_PARAMS)

/* Check whether two file descriptors refer to the same file.  */

extern int fdmatch PARAMS ((int fd1, int fd2));

/* Get the working directory.  The result is cached, so don't call
   chdir() between calls to getpwd().  */

extern char * getpwd PARAMS ((void));

/* Get the amount of time the process has run, in microseconds.  */

extern long get_run_time PARAMS ((void));

/* Generate a relocated path to some installation directory.  Allocates
   return value using malloc.  */

extern char *make_relative_prefix PARAMS ((const char *, const char *,
					   const char *));

/* Choose a temporary directory to use for scratch files.  */

extern char *choose_temp_base PARAMS ((void)) ATTRIBUTE_MALLOC;

/* Return a temporary file name or NULL if unable to create one.  */

extern char *make_temp_file PARAMS ((const char *)) ATTRIBUTE_MALLOC;

/* Remove a link to a file unless it is special. */

extern int unlink_if_ordinary PARAMS((const char *));

/* Allocate memory filled with spaces.  Allocates using malloc.  */

extern const char *spaces PARAMS ((int count));

/* Return the maximum error number for which strerror will return a
   string.  */

extern int errno_max PARAMS ((void));

/* Return the name of an errno value (e.g., strerrno (EINVAL) returns
   "EINVAL").  */

extern const char *strerrno PARAMS ((int));

/* Given the name of an errno value, return the value.  */

extern int strtoerrno PARAMS ((const char *));

/* ANSI's strerror(), but more robust.  */

extern char *xstrerror PARAMS ((int));

/* Return the maximum signal number for which strsignal will return a
   string.  */

extern int signo_max PARAMS ((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 PARAMS ((int));*/

/* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
   "SIGHUP").  */

extern const char *strsigno PARAMS ((int));

/* Given the name of a signal, return its number.  */

extern int strtosigno PARAMS ((const char *));

/* Register a function to be run by xexit.  Returns 0 on success.  */

extern int xatexit PARAMS ((void (*fn) (void)));

/* Exit, calling all the functions registered with xatexit.  */

extern void xexit PARAMS ((int status)) ATTRIBUTE_NORETURN;

/* Set the program name used by xmalloc.  */

extern void xmalloc_set_program_name PARAMS ((const char *));

/* Report an allocation failure.  */
extern void xmalloc_failed PARAMS ((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 PTR xmalloc PARAMS ((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 PTR xrealloc PARAMS ((PTR, size_t));

/* Allocate memory without fail and set it to zero.  This works like
   xmalloc.  */

extern PTR xcalloc PARAMS ((size_t, size_t)) ATTRIBUTE_MALLOC;

/* Copy a string into a memory buffer without fail.  */

extern char *xstrdup PARAMS ((const char *)) ATTRIBUTE_MALLOC;

/* Copy an existing memory buffer to a new memory buffer without fail.  */

extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;

/* Physical memory routines.  Return values are in BYTES.  */
extern double physmem_total PARAMS ((void));
extern double physmem_available PARAMS ((void));


/* 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 XNEW(T)			((T *) xmalloc (sizeof (T)))
#define XCNEW(T)		((T *) xcalloc (1, sizeof (T)))
#define XDELETE(P)		free ((void*) (P))

/* Array allocators.  */

#define XNEWVEC(T, N)		((T *) xmalloc (sizeof (T) * (N)))
#define XCNEWVEC(T, N)		((T *) xcalloc ((N), sizeof (T)))
#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 XNEWVAR(T, S)		((T *) xmalloc ((S)))
#define XCNEWVAR(T, S)		((T *) xcalloc (1, (S)))
#define XRESIZEVAR(T, P, S)	((T *) xrealloc ((P), (S)))

/* Type-safe obstack allocator.  */

#define XOBNEW(O, T)		((T *) obstack_alloc ((O), sizeof (T)))


/* 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 PARAMS ((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)])

/* 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 PARAMS ((const char *, char * const *, const char *,
			    const char *, char **, char **, int));

/* Wait for pexecute to finish.  */

extern int pwait PARAMS ((int, int *, int));

#if !HAVE_DECL_ASPRINTF
/* Like sprintf but provides a pointer to malloc'd storage, which must
   be freed by the caller.  */

extern int asprintf PARAMS ((char **, const char *, ...)) ATTRIBUTE_PRINTF_2;
#endif

#if !HAVE_DECL_VASPRINTF
/* Like vsprintf but provides a pointer to malloc'd storage, which
   must be freed by the caller.  */

extern int vasprintf PARAMS ((char **, const char *, va_list))
  ATTRIBUTE_PRINTF(2,0);
#endif

#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 PTR C_alloca PARAMS ((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 *const) 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) */
Commit	Line	Data
252b5132	1	/* Function declarations for libiberty.
4f1d9bd8	2
1d619e59	3	Copyright 2001, 2002 Free Software Foundation, Inc.
4f1d9bd8	4
526c3e12 NC	5	Note - certain prototypes declared in this header file are for
	6	functions whoes implementation copyright does not belong to the
	7	FSF. Those prototypes are present in this file for reference
	8	purposes only and their presence in this file should not construed
	9	as an indication of ownership by the FSF of the implementation of
	10	those functions in any way or form whatsoever.
	11
4f1d9bd8 NC	12	This program is free software; you can redistribute it and/or modify
	13	it under the terms of the GNU General Public License as published by
	14	the Free Software Foundation; either version 2, or (at your option)
	15	any later version.
	16
	17	This program is distributed in the hope that it will be useful,
	18	but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	20	GNU General Public License for more details.
	21
	22	You should have received a copy of the GNU General Public License
	23	along with this program; if not, write to the Free Software
	24	Foundation, Inc., 59 Temple Place - Suite 330,
	25	Boston, MA 02111-1307, USA.
	26
252b5132 RH	27	Written by Cygnus Support, 1994.
	28
	29	The libiberty library provides a number of functions which are
	30	missing on some operating systems. We do not declare those here,
	31	to avoid conflicts with the system header files on operating
	32	systems that do support those functions. In this file we only
	33	declare those functions which are specific to libiberty. */
	34
	35	#ifndef LIBIBERTY_H
	36	#define LIBIBERTY_H
	37
	38	#ifdef __cplusplus
	39	extern "C" {
	40	#endif
	41
	42	#include "ansidecl.h"
	43
b13291a9 DD	44	#ifdef ANSI_PROTOTYPES
	45	/* Get a definition for size_t. */
	46	#include <stddef.h>
	47	/* Get a definition for va_list. */
	48	#include <stdarg.h>
	49	#endif
	50
252b5132 RH	51	/* Build an argument vector from a string. Allocates memory using
	52	malloc. Use freeargv to free the vector. */
	53
e6450fe5	54	extern char *buildargv PARAMS ((const char )) ATTRIBUTE_MALLOC;
252b5132 RH	55
	56	/* Free a vector returned by buildargv. */
	57
	58	extern void freeargv PARAMS ((char **));
	59
	60	/* Duplicate an argument vector. Allocates memory using malloc. Use
	61	freeargv to free the vector. */
	62
cc89ffe6	63	extern char dupargv PARAMS ((char )) ATTRIBUTE_MALLOC;
252b5132 RH	64
	65
	66	/* Return the last component of a path name. Note that we can't use a
	67	prototype here because the parameter is declared inconsistently
	68	across different systems, sometimes as "char *" and sometimes as
	69	"const char " /
	70
79c6de76 L	71	/* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is
	72	undefined, we haven't run the autoconf check so provide the
	73	declaration without arguments. If it is 0, we checked and failed
	74	to find the declaration so provide a fully prototyped one. If it
	75	is 1, we found it so don't provide any declaration at all. */
931f285f	76	#if !HAVE_DECL_BASENAME
79fadcb0	77	#if defined (__GNU_LIBRARY__ ) \|\| defined (__linux__) \|\| defined (__FreeBSD__) \|\| defined (__OpenBSD__) \|\| defined(__NetBSD__) \|\| defined (__CYGWIN__) \|\| defined (__CYGWIN32__) \|\| defined (__MINGW32__) \|\| defined (HAVE_DECL_BASENAME)
252b5132 RH	78	extern char basename PARAMS ((const char ));
	79	#else
	80	extern char *basename ();
931f285f	81	#endif
252b5132 RH	82	#endif
252b5132 RH	83
8aa30e60 DD	84	/* A well-defined basename () that is always compiled in. */
8aa30e60 DD	85
3ea71002	86	extern const char lbasename PARAMS ((const char ));
8aa30e60	87
e2803db9 DJ	88	/* A well-defined realpath () that is always compiled in. */
	89
	90	extern char lrealpath PARAMS ((const char ));
	91
38bfaea8 DD	92	/* Concatenate an arbitrary number of strings. You must pass NULL as
	93	the last argument of this function, to terminate the list of
	94	strings. Allocates memory using xmalloc. */
252b5132	95
a5ecc6a5	96	extern char concat PARAMS ((const char , ...)) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
252b5132	97
99ee3a8f DD	98	/* Concatenate an arbitrary number of strings. You must pass NULL as
	99	the last argument of this function, to terminate the list of
	100	strings. Allocates memory using xmalloc. The first argument is
	101	not one of the strings to be concatenated, but if not NULL is a
	102	pointer to be freed after the new string is created, similar to the
	103	way xrealloc works. */
	104
a5ecc6a5	105	extern char reconcat PARAMS ((char , const char *, ...)) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
99ee3a8f	106
54c20242	107	/* Determine the length of concatenating an arbitrary number of
38bfaea8 DD	108	strings. You must pass NULL as the last argument of this function,
38bfaea8 DD	109	to terminate the list of strings. */
54c20242	110
a5ecc6a5	111	extern unsigned long concat_length PARAMS ((const char *, ...)) ATTRIBUTE_SENTINEL;
54c20242 DD	112
54c20242 DD	113	/* Concatenate an arbitrary number of strings into a SUPPLIED area of
38bfaea8 DD	114	memory. You must pass NULL as the last argument of this function,
	115	to terminate the list of strings. The supplied memory is assumed
	116	to be large enough. */
54c20242	117
a5ecc6a5	118	extern char concat_copy PARAMS ((char , const char *, ...)) ATTRIBUTE_SENTINEL;
54c20242 DD	119
54c20242 DD	120	/* Concatenate an arbitrary number of strings into a GLOBAL area of
38bfaea8 DD	121	memory. You must pass NULL as the last argument of this function,
	122	to terminate the list of strings. The supplied memory is assumed
	123	to be large enough. */
54c20242	124
a5ecc6a5	125	extern char concat_copy2 PARAMS ((const char , ...)) ATTRIBUTE_SENTINEL;
54c20242 DD	126
	127	/* This is the global area used by concat_copy2. */
	128
	129	extern char *libiberty_concat_ptr;
	130
38bfaea8 DD	131	/* Concatenate an arbitrary number of strings. You must pass NULL as
	132	the last argument of this function, to terminate the list of
	133	strings. Allocates memory using alloca. The arguments are
	134	evaluated twice! */
54c20242 DD	135	#define ACONCAT(ACONCAT_PARAMS) \
	136	(libiberty_concat_ptr = alloca (concat_length ACONCAT_PARAMS + 1), \
	137	concat_copy2 ACONCAT_PARAMS)
	138
252b5132 RH	139	/* Check whether two file descriptors refer to the same file. */
	140
	141	extern int fdmatch PARAMS ((int fd1, int fd2));
	142
cc89ffe6 ILT	143	/* Get the working directory. The result is cached, so don't call
	144	chdir() between calls to getpwd(). */
	145
	146	extern char * getpwd PARAMS ((void));
	147
252b5132 RH	148	/* Get the amount of time the process has run, in microseconds. */
	149
	150	extern long get_run_time PARAMS ((void));
	151
2a80c0a4 DD	152	/* Generate a relocated path to some installation directory. Allocates
	153	return value using malloc. */
	154
	155	extern char make_relative_prefix PARAMS ((const char , const char *,
	156	const char *));
	157
252b5132 RH	158	/* Choose a temporary directory to use for scratch files. */
252b5132 RH	159
cc89ffe6 ILT	160	extern char *choose_temp_base PARAMS ((void)) ATTRIBUTE_MALLOC;
	161
	162	/* Return a temporary file name or NULL if unable to create one. */
	163
	164	extern char make_temp_file PARAMS ((const char )) ATTRIBUTE_MALLOC;
252b5132	165
190eb137 DD	166	/* Remove a link to a file unless it is special. */
	167
	168	extern int unlink_if_ordinary PARAMS((const char *));
	169
252b5132 RH	170	/* Allocate memory filled with spaces. Allocates using malloc. */
	171
	172	extern const char *spaces PARAMS ((int count));
	173
	174	/* Return the maximum error number for which strerror will return a
	175	string. */
	176
	177	extern int errno_max PARAMS ((void));
	178
	179	/* Return the name of an errno value (e.g., strerrno (EINVAL) returns
	180	"EINVAL"). */
	181
	182	extern const char *strerrno PARAMS ((int));
	183
	184	/* Given the name of an errno value, return the value. */
	185
	186	extern int strtoerrno PARAMS ((const char *));
	187
	188	/* ANSI's strerror(), but more robust. */
	189
	190	extern char *xstrerror PARAMS ((int));
	191
	192	/* Return the maximum signal number for which strsignal will return a
	193	string. */
	194
	195	extern int signo_max PARAMS ((void));
	196
	197	/* Return a signal message string for a signal number
	198	(e.g., strsignal (SIGHUP) returns something like "Hangup"). */
	199	/* This is commented out as it can conflict with one in system headers.
	200	We still document its existence though. */
	201
	202	/extern const char strsignal PARAMS ((int));*/
	203
	204	/* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
	205	"SIGHUP"). */
	206
	207	extern const char *strsigno PARAMS ((int));
	208
	209	/* Given the name of a signal, return its number. */
	210
	211	extern int strtosigno PARAMS ((const char *));
	212
	213	/* Register a function to be run by xexit. Returns 0 on success. */
	214
	215	extern int xatexit PARAMS ((void (*fn) (void)));
	216
	217	/* Exit, calling all the functions registered with xatexit. */
	218
cc89ffe6	219	extern void xexit PARAMS ((int status)) ATTRIBUTE_NORETURN;
252b5132 RH	220
	221	/* Set the program name used by xmalloc. */
	222
	223	extern void xmalloc_set_program_name PARAMS ((const char *));
	224
b13291a9 DD	225	/* Report an allocation failure. */
	226	extern void xmalloc_failed PARAMS ((size_t)) ATTRIBUTE_NORETURN;
	227
252b5132 RH	228	/* Allocate memory without fail. If malloc fails, this will print a
	229	message to stderr (using the name set by xmalloc_set_program_name,
	230	if any) and then call xexit. */
	231
cc89ffe6	232	extern PTR xmalloc PARAMS ((size_t)) ATTRIBUTE_MALLOC;
252b5132	233
cc89ffe6 ILT	234	/* Reallocate memory without fail. This works like xmalloc. Note,
	235	realloc type functions are not suitable for attribute malloc since
	236	they may return the same address across multiple calls. */
252b5132 RH	237
	238	extern PTR xrealloc PARAMS ((PTR, size_t));
	239
	240	/* Allocate memory without fail and set it to zero. This works like
	241	xmalloc. */
	242
cc89ffe6	243	extern PTR xcalloc PARAMS ((size_t, size_t)) ATTRIBUTE_MALLOC;
252b5132 RH	244
	245	/* Copy a string into a memory buffer without fail. */
	246
cc89ffe6 ILT	247	extern char xstrdup PARAMS ((const char )) ATTRIBUTE_MALLOC;
	248
	249	/* Copy an existing memory buffer to a new memory buffer without fail. */
	250
	251	extern PTR xmemdup PARAMS ((const PTR, size_t, size_t)) ATTRIBUTE_MALLOC;
252b5132	252
638ceb1a	253	/* Physical memory routines. Return values are in BYTES. */
4938384a DD	254	extern double physmem_total PARAMS ((void));
	255	extern double physmem_available PARAMS ((void));
	256
d5b4094f DD	257
	258	/* These macros provide a K&R/C89/C++-friendly way of allocating structures
	259	with nice encapsulation. The XDELETE*() macros are technically
	260	superfluous, but provided here for symmetry. Using them consistently
	261	makes it easier to update client code to use different allocators such
	262	as new/delete and new[]/delete[]. */
	263
	264	/* Scalar allocators. */
	265
	266	#define XNEW(T) ((T *) xmalloc (sizeof (T)))
	267	#define XCNEW(T) ((T *) xcalloc (1, sizeof (T)))
deaa6723	268	#define XDELETE(P) free ((void*) (P))
d5b4094f DD	269
	270	/* Array allocators. */
	271
	272	#define XNEWVEC(T, N) ((T ) xmalloc (sizeof (T) (N)))
	273	#define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T)))
deaa6723 DD	274	#define XRESIZEVEC(T, P, N) ((T ) xrealloc ((void ) (P), sizeof (T) * (N)))
deaa6723 DD	275	#define XDELETEVEC(P) free ((void*) (P))
d5b4094f DD	276
	277	/* Allocators for variable-sized structures and raw buffers. */
	278
	279	#define XNEWVAR(T, S) ((T *) xmalloc ((S)))
	280	#define XCNEWVAR(T, S) ((T *) xcalloc (1, (S)))
	281	#define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S)))
	282
	283	/* Type-safe obstack allocator. */
	284
	285	#define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T)))
	286
	287
252b5132 RH	288	/* hex character manipulation routines */
	289
	290	#define _hex_array_size 256
	291	#define _hex_bad 99
e4f79046	292	extern const unsigned char _hex_value[_hex_array_size];
252b5132 RH	293	extern void hex_init PARAMS ((void));
	294	#define hex_p(c) (hex_value (c) != _hex_bad)
	295	/* If you change this, note well: Some code relies on side effects in
	296	the argument being performed exactly once. */
e4f79046	297	#define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)])
252b5132 RH	298
	299	/* Definitions used by the pexecute routine. */
	300
	301	#define PEXECUTE_FIRST 1
	302	#define PEXECUTE_LAST 2
	303	#define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST)
	304	#define PEXECUTE_SEARCH 4
	305	#define PEXECUTE_VERBOSE 8
	306
	307	/* Execute a program. */
	308
	309	extern int pexecute PARAMS ((const char , char const , const char ,
	310	const char , char , char *, int));
	311
	312	/* Wait for pexecute to finish. */
	313
	314	extern int pwait PARAMS ((int, int *, int));
	315
bb7eb039	316	#if !HAVE_DECL_ASPRINTF
cc89ffe6 ILT	317	/* Like sprintf but provides a pointer to malloc'd storage, which must
	318	be freed by the caller. */
	319
	320	extern int asprintf PARAMS ((char *, const char , ...)) ATTRIBUTE_PRINTF_2;
bb7eb039	321	#endif
cc89ffe6	322
bb7eb039	323	#if !HAVE_DECL_VASPRINTF
cc89ffe6 ILT	324	/* Like vsprintf but provides a pointer to malloc'd storage, which
	325	must be freed by the caller. */
	326
	327	extern int vasprintf PARAMS ((char *, const char , va_list))
	328	ATTRIBUTE_PRINTF(2,0);
bb7eb039	329	#endif
cc89ffe6	330
b18903cb NC	331	#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
b18903cb NC	332
30673bf5 DD	333	/* Drastically simplified alloca configurator. If we're using GCC,
	334	we use __builtin_alloca; otherwise we use the C alloca. The C
	335	alloca is always available. You can override GCC by defining
129e8d96 DD	336	USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
	337	also set/unset as it is often used to indicate whether code needs
	338	to call alloca(0). */
1d619e59	339	extern PTR C_alloca PARAMS ((size_t)) ATTRIBUTE_MALLOC;
30673bf5 DD	340	#undef alloca
	341	#if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
	342	# define alloca(x) __builtin_alloca(x)
129e8d96	343	# undef C_ALLOCA
54c20242 DD	344	# define ASTRDUP(X) \
	345	(__extension__ ({ const char *const libiberty_optr = (X); \
	346	const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
7ab9a76e	347	char const libiberty_nptr = (char const) alloca (libiberty_len); \
54c20242	348	(char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
30673bf5 DD	349	#else
	350	# define alloca(x) C_alloca(x)
	351	# undef USE_C_ALLOCA
	352	# define USE_C_ALLOCA 1
129e8d96 DD	353	# undef C_ALLOCA
129e8d96 DD	354	# define C_ALLOCA 1
54c20242 DD	355	extern const char *libiberty_optr;
	356	extern char *libiberty_nptr;
	357	extern unsigned long libiberty_len;
	358	# define ASTRDUP(X) \
	359	(libiberty_optr = (X), \
	360	libiberty_len = strlen (libiberty_optr) + 1, \
7ab9a76e	361	libiberty_nptr = (char *) alloca (libiberty_len), \
54c20242	362	(char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
30673bf5 DD	363	#endif
30673bf5 DD	364
252b5132 RH	365	#ifdef __cplusplus
	366	}
	367	#endif
	368
	369
	370	#endif /* ! defined (LIBIBERTY_H) */