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mbed-os/platform/mbed_retarget.h

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/*
* mbed Microcontroller Library
* Copyright (c) 2006-2019 ARM Limited
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
#ifndef RETARGET_H
#define RETARGET_H
#if __cplusplus
#include <cstdio>
#else
#include <stdio.h>
#endif //__cplusplus
#include <stdint.h>
#include <stddef.h>
/* Include logic for errno so we can get errno defined but not bring in error_t,
* including errno here prevents an include later, which would redefine our
* error codes
*/
#ifndef __error_t_defined
#define __error_t_defined 1
#include <errno.h>
#undef __error_t_defined
#else
#include <errno.h>
#endif
/* We can get the following standard types from sys/types for gcc, but we
* need to define the types ourselves for the other compilers that normally
* target embedded systems */
typedef signed int ssize_t; ///< Signed size type, usually encodes negative errors
typedef signed long off_t; ///< Offset in a data stream
typedef unsigned int nfds_t; ///< Number of file descriptors
typedef unsigned long long fsblkcnt_t; ///< Count of file system blocks
#if defined(__ARMCC_VERSION) || !defined(__GNUC__)
typedef unsigned int mode_t; ///< Mode for opening files
typedef unsigned int dev_t; ///< Device ID type
typedef unsigned long ino_t; ///< File serial number
typedef unsigned int nlink_t; ///< Number of links to a file
typedef unsigned int uid_t; ///< User ID
typedef unsigned int gid_t; ///< Group ID
#endif
/* Flags for open() and fcntl(GETFL/SETFL)
* At present, fcntl only supports reading and writing O_NONBLOCK
*/
#define O_RDONLY 0 ///< Open for reading
#define O_WRONLY 1 ///< Open for writing
#define O_RDWR 2 ///< Open for reading and writing
#define O_NONBLOCK 0x0004 ///< Non-blocking mode
#define O_APPEND 0x0008 ///< Set file offset to end of file prior to each write
#define O_CREAT 0x0200 ///< Create file if it does not exist
#define O_TRUNC 0x0400 ///< Truncate file to zero length
#define O_EXCL 0x0800 ///< Fail if file exists
#define O_BINARY 0x8000 ///< Open file in binary mode
#define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
#define NAME_MAX 255 ///< Maximum size of a name in a file path
#define STDIN_FILENO 0
#define STDOUT_FILENO 1
#define STDERR_FILENO 2
#include <time.h>
/** \addtogroup platform-public-api */
/** @{*/
#if !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
/**
* \defgroup platform_retarget Retarget functions
* @{
*/
/* DIR declarations must also be here */
#if __cplusplus
namespace mbed {
class FileHandle;
class DirHandle;
/** Targets may implement this to change stdin, stdout, stderr.
*
* If the application hasn't provided mbed_override_console, this is called
* to give the target a chance to specify a FileHandle for the console.
*
* If this is not provided or returns NULL, the console will be:
* - BufferedSerial if configuration option "platform.stdio-buffered-serial" is
* true and the target has DEVICE_SERIAL;
* - Raw HAL serial via serial_getc and serial_putc if
* "platform.stdio-buffered-serial" is false and the target has DEVICE_SERIAL;
* - stdout/stderr will be a sink and stdin will input a stream of 0s if the
* target does not have DEVICE_SERIAL.
*
* @param fd file descriptor - STDIN_FILENO, STDOUT_FILENO or STDERR_FILENO
* @return pointer to FileHandle to override normal stream otherwise NULL
*/
FileHandle *mbed_target_override_console(int fd);
/** Applications may implement this to change stdin, stdout, stderr.
*
* This hook gives the application a chance to specify a custom FileHandle
* for the console.
*
* If this is not provided or returns NULL, the console will be specified
* by mbed_target_override_console, else will default to serial - see
* mbed_target_override_console for more details.
*
* Example using BufferedSerial:
* @code
* FileHandle *mbed::mbed_override_console(int) {
* static BufferedSerial my_serial(D0, D1);
* return &my_serial;
* }
* @endcode
*
* Example using SingleWireOutput:
* @code
* FileHandle *mbed::mbed_override_console(int) {
* static SerialWireOutput swo;
* return &swo;
* }
* @endcode
*
* Example using arm semihosting:
* @code
* FileHandle *mbed::mbed_override_console(int fileno) {
* static LocalFileSystem fs("host");
* if (fileno == STDIN_FILENO) {
* static FileHandle *in_terminal;
* static int in_open_result = fs.open(&in_terminal, ":tt", O_RDONLY);
* return in_terminal;
* } else {
* static FileHandle *out_terminal;
* static int out_open_result = fs.open(&out_terminal, ":tt", O_WRONLY);
* return out_terminal;
* }
* }
* @endcode
*
* @param fd file descriptor - STDIN_FILENO, STDOUT_FILENO or STDERR_FILENO
* @return pointer to FileHandle to override normal stream otherwise NULL
*/
FileHandle *mbed_override_console(int fd);
/** Look up the Mbed file handle corresponding to a file descriptor
*
* This conversion function permits an application to find the underlying
* FileHandle object corresponding to a POSIX file descriptor.
*
* This allows access to specialized behavior only available via the
* FileHandle API.
*
* Example of saving power by disabling console input - for buffered serial,
* this would release the RX interrupt handler, which would release the
* deep sleep lock.
* @code
* mbed_file_handle(STDIN_FILENO)->enable_input(false);
* @endcode
*
* @param fd file descriptor
* @return FileHandle pointer
* NULL if descriptor does not correspond to a FileHandle (only
* possible if it's not open with current implementation).
*/
FileHandle *mbed_file_handle(int fd);
}
typedef mbed::DirHandle DIR;
#else
typedef struct Dir DIR;
#endif
#endif // !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
/* The intent of this section is to unify the errno error values to match
* the POSIX definitions for the GCC_ARM, ARMCC and IAR compilers. This is
* necessary because the ARMCC/IAR errno.h, or sys/stat.h are missing some
* symbol definitions used by the POSIX filesystem API to return errno codes.
* Note also that ARMCC errno.h defines some symbol values differently from
* the GCC_ARM/IAR/standard POSIX definitions. The definitions guard against
* this and future changes by changing the symbol definition as shown below.
*/
#undef EPERM
#define EPERM 1 /* Operation not permitted */
#undef ENOENT
#define ENOENT 2 /* No such file or directory */
#undef ESRCH
#define ESRCH 3 /* No such process */
#undef EINTR
#define EINTR 4 /* Interrupted system call */
#undef EIO
#define EIO 5 /* I/O error */
#undef ENXIO
#define ENXIO 6 /* No such device or address */
#undef E2BIG
#define E2BIG 7 /* Argument list too long */
#undef ENOEXEC
#define ENOEXEC 8 /* Exec format error */
#undef EBADF
#define EBADF 9 /* Bad file number */
#undef ECHILD
#define ECHILD 10 /* No child processes */
#undef EAGAIN
#define EAGAIN 11 /* Try again */
#undef ENOMEM
#define ENOMEM 12 /* Out of memory */
#undef EACCES
#define EACCES 13 /* Permission denied */
#undef EFAULT
#define EFAULT 14 /* Bad address */
#undef ENOTBLK
#define ENOTBLK 15 /* Block device required */
#undef EBUSY
#define EBUSY 16 /* Device or resource busy */
#undef EEXIST
#define EEXIST 17 /* File exists */
#undef EXDEV
#define EXDEV 18 /* Cross-device link */
#undef ENODEV
#define ENODEV 19 /* No such device */
#undef ENOTDIR
#define ENOTDIR 20 /* Not a directory */
#undef EISDIR
#define EISDIR 21 /* Is a directory */
#undef EINVAL
#define EINVAL 22 /* Invalid argument */
#undef ENFILE
#define ENFILE 23 /* File table overflow */
#undef EMFILE
#define EMFILE 24 /* Too many open files */
#undef ENOTTY
#define ENOTTY 25 /* Not a typewriter */
#undef ETXTBSY
#define ETXTBSY 26 /* Text file busy */
#undef EFBIG
#define EFBIG 27 /* File too large */
#undef ENOSPC
#define ENOSPC 28 /* No space left on device */
#undef ESPIPE
#define ESPIPE 29 /* Illegal seek */
#undef EROFS
#define EROFS 30 /* Read-only file system */
#undef EMLINK
#define EMLINK 31 /* Too many links */
#undef EPIPE
#define EPIPE 32 /* Broken pipe */
#undef EDOM
#define EDOM 33 /* Math argument out of domain of func */
#undef ERANGE
#define ERANGE 34 /* Math result not representable */
#undef EDEADLK
#define EDEADLK 35 /* Resource deadlock would occur */
#undef ENAMETOOLONG
#define ENAMETOOLONG 36 /* File name too long */
#undef ENOLCK
#define ENOLCK 37 /* No record locks available */
#undef ENOSYS
#define ENOSYS 38 /* Function not implemented */
#undef ENOTEMPTY
#define ENOTEMPTY 39 /* Directory not empty */
#undef ELOOP
#define ELOOP 40 /* Too many symbolic links encountered */
#undef EWOULDBLOCK
#define EWOULDBLOCK EAGAIN /* Operation would block */
#undef ENOMSG
#define ENOMSG 42 /* No message of desired type */
#undef EIDRM
#define EIDRM 43 /* Identifier removed */
#undef ECHRNG
#define ECHRNG 44 /* Channel number out of range */
#undef EL2NSYNC
#define EL2NSYNC 45 /* Level 2 not synchronized */
#undef EL3HLT
#define EL3HLT 46 /* Level 3 halted */
#undef EL3RST
#define EL3RST 47 /* Level 3 reset */
#undef ELNRNG
#define ELNRNG 48 /* Link number out of range */
#undef EUNATCH
#define EUNATCH 49 /* Protocol driver not attached */
#undef ENOCSI
#define ENOCSI 50 /* No CSI structure available */
#undef EL2HLT
#define EL2HLT 51 /* Level 2 halted */
#undef EBADE
#define EBADE 52 /* Invalid exchange */
#undef EBADR
#define EBADR 53 /* Invalid request descriptor */
#undef EXFULL
#define EXFULL 54 /* Exchange full */
#undef ENOANO
#define ENOANO 55 /* No anode */
#undef EBADRQC
#define EBADRQC 56 /* Invalid request code */
#undef EBADSLT
#define EBADSLT 57 /* Invalid slot */
#undef EDEADLOCK
#define EDEADLOCK EDEADLK /* Resource deadlock would occur */
#undef EBFONT
#define EBFONT 59 /* Bad font file format */
#undef ENOSTR
#define ENOSTR 60 /* Device not a stream */
#undef ENODATA
#define ENODATA 61 /* No data available */
#undef ETIME
#define ETIME 62 /* Timer expired */
#undef ENOSR
#define ENOSR 63 /* Out of streams resources */
#undef ENONET
#define ENONET 64 /* Machine is not on the network */
#undef ENOPKG
#define ENOPKG 65 /* Package not installed */
#undef EREMOTE
#define EREMOTE 66 /* Object is remote */
#undef ENOLINK
#define ENOLINK 67 /* Link has been severed */
#undef EADV
#define EADV 68 /* Advertise error */
#undef ESRMNT
#define ESRMNT 69 /* Srmount error */
#undef ECOMM
#define ECOMM 70 /* Communication error on send */
#undef EPROTO
#define EPROTO 71 /* Protocol error */
#undef EMULTIHOP
#define EMULTIHOP 72 /* Multihop attempted */
#undef EDOTDOT
#define EDOTDOT 73 /* RFS specific error */
#undef EBADMSG
#define EBADMSG 74 /* Not a data message */
#undef EOVERFLOW
#define EOVERFLOW 75 /* Value too large for defined data type */
#undef ENOTUNIQ
#define ENOTUNIQ 76 /* Name not unique on network */
#undef EBADFD
#define EBADFD 77 /* File descriptor in bad state */
#undef EREMCHG
#define EREMCHG 78 /* Remote address changed */
#undef ELIBACC
#define ELIBACC 79 /* Can not access a needed shared library */
#undef ELIBBAD
#define ELIBBAD 80 /* Accessing a corrupted shared library */
#undef ELIBSCN
#define ELIBSCN 81 /* .lib section in a.out corrupted */
#undef ELIBMAX
#define ELIBMAX 82 /* Attempting to link in too many shared libraries */
#undef ELIBEXEC
#define ELIBEXEC 83 /* Cannot exec a shared library directly */
#undef EILSEQ
#define EILSEQ 84 /* Illegal byte sequence */
#undef ERESTART
#define ERESTART 85 /* Interrupted system call should be restarted */
#undef ESTRPIPE
#define ESTRPIPE 86 /* Streams pipe error */
#undef EUSERS
#define EUSERS 87 /* Too many users */
#undef ENOTSOCK
#define ENOTSOCK 88 /* Socket operation on non-socket */
#undef EDESTADDRREQ
#define EDESTADDRREQ 89 /* Destination address required */
#undef EMSGSIZE
#define EMSGSIZE 90 /* Message too long */
#undef EPROTOTYPE
#define EPROTOTYPE 91 /* Protocol wrong type for socket */
#undef ENOPROTOOPT
#define ENOPROTOOPT 92 /* Protocol not available */
#undef EPROTONOSUPPORT
#define EPROTONOSUPPORT 93 /* Protocol not supported */
#undef ESOCKTNOSUPPORT
#define ESOCKTNOSUPPORT 94 /* Socket type not supported */
#undef EOPNOTSUPP
#define EOPNOTSUPP 95 /* Operation not supported on transport endpoint */
#undef EPFNOSUPPORT
#define EPFNOSUPPORT 96 /* Protocol family not supported */
#undef EAFNOSUPPORT
#define EAFNOSUPPORT 97 /* Address family not supported by protocol */
#undef EADDRINUSE
#define EADDRINUSE 98 /* Address already in use */
#undef EADDRNOTAVAIL
#define EADDRNOTAVAIL 99 /* Cannot assign requested address */
#undef ENETDOWN
#define ENETDOWN 100 /* Network is down */
#undef ENETUNREACH
#define ENETUNREACH 101 /* Network is unreachable */
#undef ENETRESET
#define ENETRESET 102 /* Network dropped connection because of reset */
#undef ECONNABORTED
#define ECONNABORTED 103 /* Software caused connection abort */
#undef ECONNRESET
#define ECONNRESET 104 /* Connection reset by peer */
#undef ENOBUFS
#define ENOBUFS 105 /* No buffer space available */
#undef EISCONN
#define EISCONN 106 /* Transport endpoint is already connected */
#undef ENOTCONN
#define ENOTCONN 107 /* Transport endpoint is not connected */
#undef ESHUTDOWN
#define ESHUTDOWN 108 /* Cannot send after transport endpoint shutdown */
#undef ETOOMANYREFS
#define ETOOMANYREFS 109 /* Too many references: cannot splice */
#undef ETIMEDOUT
#define ETIMEDOUT 110 /* Connection timed out */
#undef ECONNREFUSED
#define ECONNREFUSED 111 /* Connection refused */
#undef EHOSTDOWN
#define EHOSTDOWN 112 /* Host is down */
#undef EHOSTUNREACH
#define EHOSTUNREACH 113 /* No route to host */
#undef EALREADY
#define EALREADY 114 /* Operation already in progress */
#undef EINPROGRESS
#define EINPROGRESS 115 /* Operation now in progress */
#undef ESTALE
#define ESTALE 116 /* Stale NFS file handle */
#undef EUCLEAN
#define EUCLEAN 117 /* Structure needs cleaning */
#undef ENOTNAM
#define ENOTNAM 118 /* Not a XENIX named type file */
#undef ENAVAIL
#define ENAVAIL 119 /* No XENIX semaphores available */
#undef EISNAM
#define EISNAM 120 /* Is a named type file */
#undef EREMOTEIO
#define EREMOTEIO 121 /* Remote I/O error */
#undef EDQUOT
#define EDQUOT 122 /* Quota exceeded */
#undef ENOMEDIUM
#define ENOMEDIUM 123 /* No medium found */
#undef EMEDIUMTYPE
#define EMEDIUMTYPE 124 /* Wrong medium type */
#undef ECANCELED
#define ECANCELED 125 /* Operation Canceled */
#undef ENOKEY
#define ENOKEY 126 /* Required key not available */
#undef EKEYEXPIRED
#define EKEYEXPIRED 127 /* Key has expired */
#undef EKEYREVOKED
#define EKEYREVOKED 128 /* Key has been revoked */
#undef EKEYREJECTED
#define EKEYREJECTED 129 /* Key was rejected by service */
#undef EOWNERDEAD
#define EOWNERDEAD 130 /* Owner died */
#undef ENOTRECOVERABLE
#define ENOTRECOVERABLE 131 /* State not recoverable */
/* Missing stat.h defines.
* The following are sys/stat.h definitions not currently present in the ARMCC
* errno.h. Note, ARMCC errno.h defines some symbol values differing from
* GCC_ARM/IAR/standard POSIX definitions. Guard against this and future
* changes by changing the symbol definition for filesystem use.
*/
#define _IFMT 0170000 //< type of file
#define _IFSOCK 0140000 //< socket
#define _IFLNK 0120000 //< symbolic link
#define _IFREG 0100000 //< regular
#define _IFBLK 0060000 //< block special
#define _IFDIR 0040000 //< directory
#define _IFCHR 0020000 //< character special
#define _IFIFO 0010000 //< fifo special
#define S_IFMT _IFMT //< type of file
#define S_IFSOCK _IFSOCK //< socket
#define S_IFLNK _IFLNK //< symbolic link
#define S_IFREG _IFREG //< regular
#define S_IFBLK _IFBLK //< block special
#define S_IFDIR _IFDIR //< directory
#define S_IFCHR _IFCHR //< character special
#define S_IFIFO _IFIFO //< fifo special
#define S_IRWXU (S_IRUSR | S_IWUSR | S_IXUSR)
#define S_IRUSR 0000400 ///< read permission, owner
#define S_IWUSR 0000200 ///< write permission, owner
#define S_IXUSR 0000100 ///< execute/search permission, owner
#define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
#define S_IRGRP 0000040 ///< read permission, group
#define S_IWGRP 0000020 ///< write permission, group
#define S_IXGRP 0000010 ///< execute/search permission, group
#define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
#define S_IROTH 0000004 ///< read permission, other
#define S_IWOTH 0000002 ///< write permission, other
#define S_IXOTH 0000001 ///< execute/search permission, other
/* Refer to sys/stat standard
* Note: Not all fields may be supported by the underlying filesystem
*/
struct stat {
dev_t st_dev; ///< Device ID containing file
ino_t st_ino; ///< File serial number
mode_t st_mode; ///< Mode of file
nlink_t st_nlink; ///< Number of links to file
uid_t st_uid; ///< User ID
gid_t st_gid; ///< Group ID
off_t st_size; ///< Size of file in bytes
time_t st_atime; ///< Time of last access
time_t st_mtime; ///< Time of last data modification
time_t st_ctime; ///< Time of last status change
};
struct statvfs {
unsigned long f_bsize; ///< Filesystem block size
unsigned long f_frsize; ///< Fragment size (block size)
fsblkcnt_t f_blocks; ///< Number of blocks
fsblkcnt_t f_bfree; ///< Number of free blocks
fsblkcnt_t f_bavail; ///< Number of free blocks for unprivileged users
unsigned long f_fsid; ///< Filesystem ID
unsigned long f_namemax; ///< Maximum filename length
};
/* The following are dirent.h definitions are declared here to guarantee
* consistency where structure may be different with different toolchains
*/
struct dirent {
char d_name[NAME_MAX + 1]; ///< Name of file
uint8_t d_type; ///< Type of file
};
enum {
DT_UNKNOWN, ///< The file type could not be determined.
DT_FIFO, ///< This is a named pipe (FIFO).
DT_CHR, ///< This is a character device.
DT_DIR, ///< This is a directory.
DT_BLK, ///< This is a block device.
DT_REG, ///< This is a regular file.
DT_LNK, ///< This is a symbolic link.
DT_SOCK, ///< This is a UNIX domain socket.
};
/* fcntl.h defines */
#define F_GETFL 3
#define F_SETFL 4
struct pollfd {
int fd;
short events;
short revents;
};
/* POSIX-compatible I/O functions */
#if __cplusplus
extern "C" {
#endif
#if !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
int open(const char *path, int oflag, ...);
#ifndef __IAR_SYSTEMS_ICC__ /* IAR provides fdopen itself */
#if __cplusplus
std::FILE *fdopen(int fildes, const char *mode);
#else
FILE *fdopen(int fildes, const char *mode);
#endif
#endif
#endif // !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
ssize_t write(int fildes, const void *buf, size_t nbyte);
ssize_t read(int fildes, void *buf, size_t nbyte);
int fsync(int fildes);
int isatty(int fildes);
#if !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
off_t lseek(int fildes, off_t offset, int whence);
int ftruncate(int fildes, off_t length);
int fstat(int fildes, struct stat *st);
int fcntl(int fildes, int cmd, ...);
int poll(struct pollfd fds[], nfds_t nfds, int timeout);
int close(int fildes);
int stat(const char *path, struct stat *st);
int statvfs(const char *path, struct statvfs *buf);
DIR *opendir(const char *);
struct dirent *readdir(DIR *);
int closedir(DIR *);
void rewinddir(DIR *);
long telldir(DIR *);
void seekdir(DIR *, long);
int mkdir(const char *name, mode_t n);
#endif // !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
#if __cplusplus
} // extern "C"
namespace mbed {
#if !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
/** This call is an analogue to POSIX fdopen().
*
* It associates a C stream to an already-opened FileHandle, to allow you to
* use C printf/scanf/fwrite etc. The provided FileHandle must remain open -
* it will be closed by the C library when fclose(FILE) is called.
*
* The net effect is fdopen(bind_to_fd(fh), mode), with error handling.
*
* @param fh a pointer to an opened FileHandle
* @param mode operation upon the file descriptor, e.g., "w+"
*
* @returns a pointer to FILE
*/
std::FILE *fdopen(mbed::FileHandle *fh, const char *mode);
/** Bind an mbed FileHandle to a POSIX file descriptor
*
* This is similar to fdopen, but only operating at the POSIX layer - it
* associates a POSIX integer file descriptor with a FileHandle, to allow you
* to use POSIX read/write calls etc. The provided FileHandle must remain open -
* it will be closed when close(int) is called.
*
* @param fh a pointer to an opened FileHandle
*
* @return an integer file descriptor, or negative if no descriptors available
*/
int bind_to_fd(mbed::FileHandle *fh);
#else
/** Targets may implement this to override how to write to the console.
*
* If the target has provided minimal_console_putc, this is called
* to give the target a chance to specify an alternative minimal console.
*
* If this is not provided, serial_putc will be used if
* `target.console-uart` is `true`, else there will not be an output.
*
* @param c The char to write
* @return The written char
*/
int minimal_console_putc(int c);
/** Targets may implement this to override how to read from the console.
*
* If the target has provided minimal_console_getc, this is called
* to give the target a chance to specify an alternative minimal console.
*
* If this is not provided, serial_getc will be used if
* `target.console-uart` is `true`, else no input would be captured.
*
* @return The char read from the serial port
*/
int minimal_console_getc();
#endif // !MBED_CONF_PLATFORM_STDIO_MINIMAL_CONSOLE_ONLY
} // namespace mbed
#endif // __cplusplus
/**@}*/
/**@}*/
#endif /* RETARGET_H */
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