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574 lines
20 KiB
C
574 lines
20 KiB
C
/* Function declarations for libiberty.
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Copyright 2001, 2002, 2005 Free Software Foundation, Inc.
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Note - certain prototypes declared in this header file are for
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functions whoes implementation copyright does not belong to the
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FSF. Those prototypes are present in this file for reference
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purposes only and their presence in this file should not construed
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as an indication of ownership by the FSF of the implementation of
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those functions in any way or form whatsoever.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA.
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Written by Cygnus Support, 1994.
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The libiberty library provides a number of functions which are
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missing on some operating systems. We do not declare those here,
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to avoid conflicts with the system header files on operating
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systems that do support those functions. In this file we only
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declare those functions which are specific to libiberty. */
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#ifndef LIBIBERTY_H
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#define LIBIBERTY_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "ansidecl.h"
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/* Get a definition for size_t. */
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#include <stddef.h>
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/* Get a definition for va_list. */
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#include <stdarg.h>
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#include <stdio.h>
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/* If the OS supports it, ensure that the supplied stream is setup to
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avoid any multi-threaded locking. Otherwise leave the FILE pointer
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unchanged. If the stream is NULL do nothing. */
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extern void unlock_stream (FILE *);
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/* If the OS supports it, ensure that the standard I/O streams, stdin,
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stdout and stderr are setup to avoid any multi-threaded locking.
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Otherwise do nothing. */
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extern void unlock_std_streams (void);
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/* Open and return a FILE pointer. If the OS supports it, ensure that
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the stream is setup to avoid any multi-threaded locking. Otherwise
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return the FILE pointer unchanged. */
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extern FILE *fopen_unlocked (const char *, const char *);
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extern FILE *fdopen_unlocked (int, const char *);
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extern FILE *freopen_unlocked (const char *, const char *, FILE *);
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/* Build an argument vector from a string. Allocates memory using
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malloc. Use freeargv to free the vector. */
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extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
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/* Free a vector returned by buildargv. */
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extern void freeargv (char **);
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/* Duplicate an argument vector. Allocates memory using malloc. Use
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freeargv to free the vector. */
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extern char **dupargv (char **) ATTRIBUTE_MALLOC;
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/* Return the last component of a path name. Note that we can't use a
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prototype here because the parameter is declared inconsistently
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across different systems, sometimes as "char *" and sometimes as
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"const char *" */
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/* HAVE_DECL_* is a three-state macro: undefined, 0 or 1. If it is
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undefined, we haven't run the autoconf check so provide the
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declaration without arguments. If it is 0, we checked and failed
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to find the declaration so provide a fully prototyped one. If it
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is 1, we found it so don't provide any declaration at all. */
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#if !HAVE_DECL_BASENAME
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#if defined (__GNU_LIBRARY__ ) || defined (__linux__) || defined (__FreeBSD__) || defined (__OpenBSD__) || defined(__NetBSD__) || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) || defined (HAVE_DECL_BASENAME)
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extern char *basename (const char *);
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#else
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/* Do not allow basename to be used if there is no prototype seen. We
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either need to use the above prototype or have one from
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autoconf which would result in HAVE_DECL_BASENAME being set. */
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#define basename basename_cannot_be_used_without_a_prototype
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#endif
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#endif
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/* A well-defined basename () that is always compiled in. */
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extern const char *lbasename (const char *);
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/* A well-defined realpath () that is always compiled in. */
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extern char *lrealpath (const char *);
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/* Concatenate an arbitrary number of strings. You must pass NULL as
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the last argument of this function, to terminate the list of
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strings. Allocates memory using xmalloc. */
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extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
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/* Concatenate an arbitrary number of strings. You must pass NULL as
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the last argument of this function, to terminate the list of
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strings. Allocates memory using xmalloc. The first argument is
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not one of the strings to be concatenated, but if not NULL is a
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pointer to be freed after the new string is created, similar to the
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way xrealloc works. */
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extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_SENTINEL;
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/* Determine the length of concatenating an arbitrary number of
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strings. You must pass NULL as the last argument of this function,
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to terminate the list of strings. */
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extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
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/* Concatenate an arbitrary number of strings into a SUPPLIED area of
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memory. You must pass NULL as the last argument of this function,
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to terminate the list of strings. The supplied memory is assumed
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to be large enough. */
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extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_SENTINEL;
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/* Concatenate an arbitrary number of strings into a GLOBAL area of
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memory. You must pass NULL as the last argument of this function,
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to terminate the list of strings. The supplied memory is assumed
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to be large enough. */
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extern char *concat_copy2 (const char *, ...) ATTRIBUTE_SENTINEL;
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/* This is the global area used by concat_copy2. */
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extern char *libiberty_concat_ptr;
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/* Concatenate an arbitrary number of strings. You must pass NULL as
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the last argument of this function, to terminate the list of
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strings. Allocates memory using alloca. The arguments are
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evaluated twice! */
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#define ACONCAT(ACONCAT_PARAMS) \
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(libiberty_concat_ptr = alloca (concat_length ACONCAT_PARAMS + 1), \
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concat_copy2 ACONCAT_PARAMS)
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/* Check whether two file descriptors refer to the same file. */
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extern int fdmatch (int fd1, int fd2);
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/* Return the position of the first bit set in the argument. */
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/* Prototypes vary from system to system, so we only provide a
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prototype on systems where we know that we need it. */
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#if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
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extern int ffs(int);
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#endif
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/* Get the working directory. The result is cached, so don't call
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chdir() between calls to getpwd(). */
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extern char * getpwd (void);
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/* Get the current time. */
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/* Prototypes vary from system to system, so we only provide a
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prototype on systems where we know that we need it. */
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#ifdef __MINGW32__
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/* Forward declaration to avoid #include <sys/time.h>. */
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struct timeval;
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extern int gettimeofday (struct timeval *, void *);
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#endif
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/* Get the amount of time the process has run, in microseconds. */
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extern long get_run_time (void);
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/* Generate a relocated path to some installation directory. Allocates
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return value using malloc. */
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extern char *make_relative_prefix (const char *, const char *,
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const char *) ATTRIBUTE_MALLOC;
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/* Choose a temporary directory to use for scratch files. */
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extern char *choose_temp_base (void) ATTRIBUTE_MALLOC;
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/* Return a temporary file name or NULL if unable to create one. */
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extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
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/* Remove a link to a file unless it is special. */
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extern int unlink_if_ordinary (const char *);
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/* Allocate memory filled with spaces. Allocates using malloc. */
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extern const char *spaces (int count);
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/* Return the maximum error number for which strerror will return a
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string. */
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extern int errno_max (void);
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/* Return the name of an errno value (e.g., strerrno (EINVAL) returns
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"EINVAL"). */
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extern const char *strerrno (int);
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/* Given the name of an errno value, return the value. */
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extern int strtoerrno (const char *);
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/* ANSI's strerror(), but more robust. */
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extern char *xstrerror (int);
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/* Return the maximum signal number for which strsignal will return a
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string. */
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extern int signo_max (void);
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/* Return a signal message string for a signal number
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(e.g., strsignal (SIGHUP) returns something like "Hangup"). */
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/* This is commented out as it can conflict with one in system headers.
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We still document its existence though. */
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/*extern const char *strsignal (int);*/
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/* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
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"SIGHUP"). */
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extern const char *strsigno (int);
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/* Given the name of a signal, return its number. */
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extern int strtosigno (const char *);
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/* Register a function to be run by xexit. Returns 0 on success. */
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extern int xatexit (void (*fn) (void));
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/* Exit, calling all the functions registered with xatexit. */
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extern void xexit (int status) ATTRIBUTE_NORETURN;
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/* Set the program name used by xmalloc. */
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extern void xmalloc_set_program_name (const char *);
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/* Report an allocation failure. */
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extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
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/* Allocate memory without fail. If malloc fails, this will print a
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message to stderr (using the name set by xmalloc_set_program_name,
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if any) and then call xexit. */
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extern void *xmalloc (size_t) ATTRIBUTE_MALLOC;
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/* Reallocate memory without fail. This works like xmalloc. Note,
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realloc type functions are not suitable for attribute malloc since
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they may return the same address across multiple calls. */
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extern void *xrealloc (void *, size_t);
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/* Allocate memory without fail and set it to zero. This works like
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xmalloc. */
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extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC;
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/* Copy a string into a memory buffer without fail. */
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extern char *xstrdup (const char *) ATTRIBUTE_MALLOC;
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/* Copy at most N characters from string into a buffer without fail. */
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extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC;
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/* Copy an existing memory buffer to a new memory buffer without fail. */
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extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC;
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/* Physical memory routines. Return values are in BYTES. */
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extern double physmem_total (void);
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extern double physmem_available (void);
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/* These macros provide a K&R/C89/C++-friendly way of allocating structures
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with nice encapsulation. The XDELETE*() macros are technically
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superfluous, but provided here for symmetry. Using them consistently
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makes it easier to update client code to use different allocators such
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as new/delete and new[]/delete[]. */
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/* Scalar allocators. */
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#define XNEW(T) ((T *) xmalloc (sizeof (T)))
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#define XCNEW(T) ((T *) xcalloc (1, sizeof (T)))
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#define XDELETE(P) free ((void*) (P))
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/* Array allocators. */
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#define XNEWVEC(T, N) ((T *) xmalloc (sizeof (T) * (N)))
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#define XCNEWVEC(T, N) ((T *) xcalloc ((N), sizeof (T)))
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#define XRESIZEVEC(T, P, N) ((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
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#define XDELETEVEC(P) free ((void*) (P))
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/* Allocators for variable-sized structures and raw buffers. */
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#define XNEWVAR(T, S) ((T *) xmalloc ((S)))
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#define XCNEWVAR(T, S) ((T *) xcalloc (1, (S)))
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#define XRESIZEVAR(T, P, S) ((T *) xrealloc ((P), (S)))
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/* Type-safe obstack allocator. */
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#define XOBNEW(O, T) ((T *) obstack_alloc ((O), sizeof (T)))
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/* hex character manipulation routines */
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#define _hex_array_size 256
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#define _hex_bad 99
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extern const unsigned char _hex_value[_hex_array_size];
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extern void hex_init (void);
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#define hex_p(c) (hex_value (c) != _hex_bad)
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/* If you change this, note well: Some code relies on side effects in
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the argument being performed exactly once. */
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#define hex_value(c) ((unsigned int) _hex_value[(unsigned char) (c)])
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/* Flags for pex_init. These are bits to be or'ed together. */
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/* Record subprocess times, if possible. */
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#define PEX_RECORD_TIMES 0x1
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/* Use pipes for communication between processes, if possible. */
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#define PEX_USE_PIPES 0x2
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/* Save files used for communication between processes. */
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#define PEX_SAVE_TEMPS 0x4
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/* Prepare to execute one or more programs, with standard output of
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each program fed to standard input of the next.
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FLAGS As above.
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PNAME The name of the program to report in error messages.
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TEMPBASE A base name to use for temporary files; may be NULL to
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use a random name.
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Returns NULL on error. */
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extern struct pex_obj *pex_init (int flags, const char *pname,
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const char *tempbase);
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/* Flags for pex_run. These are bits to be or'ed together. */
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/* Last program in pipeline. Standard output of program goes to
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OUTNAME, or, if OUTNAME is NULL, to standard output of caller. Do
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not set this if you want to call pex_read_output. After this is
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set, pex_run may no longer be called with the same struct
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pex_obj. */
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#define PEX_LAST 0x1
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/* Search for program in executable search path. */
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#define PEX_SEARCH 0x2
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/* OUTNAME is a suffix. */
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#define PEX_SUFFIX 0x4
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/* Send program's standard error to standard output. */
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#define PEX_STDERR_TO_STDOUT 0x8
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/* Input file should be opened in binary mode. This flag is ignored
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on Unix. */
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#define PEX_BINARY_INPUT 0x10
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/* Output file should be opened in binary mode. This flag is ignored
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on Unix. For proper behaviour PEX_BINARY_INPUT and
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PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
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PEX_BINARY_OUTPUT should be followed by a call using
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PEX_BINARY_INPUT. */
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#define PEX_BINARY_OUTPUT 0x20
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/* Execute one program. Returns NULL on success. On error returns an
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error string (typically just the name of a system call); the error
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string is statically allocated.
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OBJ Returned by pex_init.
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FLAGS As above.
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EXECUTABLE The program to execute.
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ARGV NULL terminated array of arguments to pass to the program.
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OUTNAME Sets the output file name as follows:
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PEX_SUFFIX set (OUTNAME may not be NULL):
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TEMPBASE parameter to pex_init not NULL:
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Output file name is the concatenation of TEMPBASE
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and OUTNAME.
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TEMPBASE is NULL:
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Output file name is a random file name ending in
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OUTNAME.
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PEX_SUFFIX not set:
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OUTNAME not NULL:
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Output file name is OUTNAME.
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OUTNAME NULL, TEMPBASE not NULL:
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Output file name is randomly chosen using
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TEMPBASE.
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OUTNAME NULL, TEMPBASE NULL:
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Output file name is randomly chosen.
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If PEX_LAST is not set, the output file name is the
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name to use for a temporary file holding stdout, if
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any (there will not be a file if PEX_USE_PIPES is set
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and the system supports pipes). If a file is used, it
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will be removed when no longer needed unless
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PEX_SAVE_TEMPS is set.
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If PEX_LAST is set, and OUTNAME is not NULL, standard
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output is written to the output file name. The file
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will not be removed. If PEX_LAST and PEX_SUFFIX are
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both set, TEMPBASE may not be NULL.
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ERRNAME If not NULL, this is the name of a file to which
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standard error is written. If NULL, standard error of
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the program is standard error of the caller.
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ERR On an error return, *ERR is set to an errno value, or
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to 0 if there is no relevant errno.
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*/
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extern const char *pex_run (struct pex_obj *obj, int flags,
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const char *executable, char * const *argv,
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const char *outname, const char *errname,
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int *err);
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/* Read the standard output of the last program to be executed.
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pex_run can not be called after this. BINARY should be non-zero if
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the file should be opened in binary mode; this is ignored on Unix.
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Returns NULL on error. Don't call fclose on the returned FILE; it
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will be closed by pex_free. */
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extern FILE *pex_read_output (struct pex_obj *, int binary);
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/* Return exit status of all programs in VECTOR. COUNT indicates the
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size of VECTOR. The status codes in the vector are in the order of
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the calls to pex_run. Returns 0 on error, 1 on success. */
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extern int pex_get_status (struct pex_obj *, int count, int *vector);
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/* Return times of all programs in VECTOR. COUNT indicates the size
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of VECTOR. struct pex_time is really just struct timeval, but that
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is not portable to all systems. Returns 0 on error, 1 on
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success. */
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struct pex_time
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{
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unsigned long user_seconds;
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unsigned long user_microseconds;
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unsigned long system_seconds;
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unsigned long system_microseconds;
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};
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extern int pex_get_times (struct pex_obj *, int count,
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struct pex_time *vector);
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/* Clean up a pex_obj. */
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extern void pex_free (struct pex_obj *);
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/* Just execute one program. Return value is as for pex_run.
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FLAGS Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
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EXECUTABLE As for pex_run.
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ARGV As for pex_run.
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PNAME As for pex_init.
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OUTNAME As for pex_run when PEX_LAST is set.
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ERRNAME As for pex_run.
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STATUS Set to exit status on success.
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ERR As for pex_run.
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*/
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extern const char *pex_one (int flags, const char *executable,
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char * const *argv, const char *pname,
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const char *outname, const char *errname,
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int *status, int *err);
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/* pexecute and pwait are the old pexecute interface, still here for
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backward compatibility. Don't use these for new code. Instead,
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use pex_init/pex_run/pex_get_status/pex_free, or pex_one. */
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/* Definitions used by the pexecute routine. */
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#define PEXECUTE_FIRST 1
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#define PEXECUTE_LAST 2
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#define PEXECUTE_ONE (PEXECUTE_FIRST + PEXECUTE_LAST)
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#define PEXECUTE_SEARCH 4
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#define PEXECUTE_VERBOSE 8
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/* Execute a program. */
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extern int pexecute (const char *, char * const *, const char *,
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const char *, char **, char **, int);
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/* Wait for pexecute to finish. */
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extern int pwait (int, int *, int);
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#if !HAVE_DECL_ASPRINTF
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/* Like sprintf but provides a pointer to malloc'd storage, which must
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be freed by the caller. */
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extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
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#endif
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#if !HAVE_DECL_VASPRINTF
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/* Like vsprintf but provides a pointer to malloc'd storage, which
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must be freed by the caller. */
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extern int vasprintf (char **, const char *, va_list)
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ATTRIBUTE_PRINTF(2,0);
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#endif
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#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
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/* Drastically simplified alloca configurator. If we're using GCC,
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we use __builtin_alloca; otherwise we use the C alloca. The C
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alloca is always available. You can override GCC by defining
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USE_C_ALLOCA yourself. The canonical autoconf macro C_ALLOCA is
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also set/unset as it is often used to indicate whether code needs
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to call alloca(0). */
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extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
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#undef alloca
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#if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
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# define alloca(x) __builtin_alloca(x)
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# undef C_ALLOCA
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# define ASTRDUP(X) \
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(__extension__ ({ const char *const libiberty_optr = (X); \
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const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
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char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
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(char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
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#else
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# define alloca(x) C_alloca(x)
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# undef USE_C_ALLOCA
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# define USE_C_ALLOCA 1
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# undef C_ALLOCA
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# define C_ALLOCA 1
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extern const char *libiberty_optr;
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extern char *libiberty_nptr;
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extern unsigned long libiberty_len;
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# define ASTRDUP(X) \
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(libiberty_optr = (X), \
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libiberty_len = strlen (libiberty_optr) + 1, \
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libiberty_nptr = (char *) alloca (libiberty_len), \
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(char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* ! defined (LIBIBERTY_H) */
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