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-rw-r--r--stdio/vfprintf.c907
1 files changed, 907 insertions, 0 deletions
diff --git a/stdio/vfprintf.c b/stdio/vfprintf.c
new file mode 100644
index 0000000000..c480a93ab9
--- /dev/null
+++ b/stdio/vfprintf.c
@@ -0,0 +1,907 @@
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <ansidecl.h>
+#include <localeinfo.h>
+#include <ctype.h>
+#include <errno.h>
+#include <float.h>
+#include <limits.h>
+#include <math.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <string.h>
+#include <printf.h>
+#include <assert.h>
+#include <stddef.h>
+#include "_itoa.h"
+
+/* This function from the GNU C library is also used in libio.
+ To compile for use in libio, compile with -DUSE_IN_LIBIO. */
+
+#ifdef USE_IN_LIBIO
+/* This code is for use in libio. */
+#include <libioP.h>
+#define PUT(f, s, n) _IO_sputn (f, s, n)
+#define PAD(padchar) _IO_padn (s, padchar, width)
+#define PUTC(c, f) _IO_putc(c, f)
+#define vfprintf _IO_vfprintf
+#define size_t _IO_size_t
+#define FILE _IO_FILE
+#define va_list _IO_va_list
+#undef BUFSIZ
+#define BUFSIZ _IO_BUFSIZ
+#define ARGCHECK(s, format) \
+ do \
+ { \
+ /* Check file argument for consistence. */ \
+ CHECK_FILE(s, -1); \
+ if (s->_flags & _IO_NO_WRITES || format == NULL) \
+ { \
+ MAYBE_SET_EINVAL; \
+ return -1; \
+ } \
+ } while (0)
+#define UNBUFFERED_P(s) ((s)->_IO_file_flags & _IO_UNBUFFERED)
+#else /* ! USE_IN_LIBIO */
+/* This code is for use in the GNU C library. */
+#include <stdio.h>
+#define PUTC(c, f) putc (c, f)
+#define PUT(f, s, n) fwrite (s, 1, n, f)
+ssize_t __printf_pad __P ((FILE *, char pad, int n));
+#define PAD(padchar) __printf_pad (s, padchar, width)
+#define ARGCHECK(s, format) \
+ do \
+ { \
+ /* Check file argument for consistence. */ \
+ if (!__validfp(s) || !s->__mode.__write || format == NULL) \
+ { \
+ errno = EINVAL; \
+ return -1; \
+ } \
+ if (!s->__seen) \
+ { \
+ if (__flshfp (s, EOF) == EOF) \
+ return -1; \
+ } \
+ } while (0)
+#define UNBUFFERED_P(s) ((s)->__buffer == NULL)
+#endif /* USE_IN_LIBIO */
+
+
+#define outchar(x) \
+ do \
+ { \
+ register CONST int outc = (x); \
+ if (putc(outc, s) == EOF) \
+ return -1; \
+ else \
+ ++done; \
+ } while (0)
+
+/* Advances STRING after writing LEN chars of it. */
+#define outstring(string, len) \
+ do \
+ { \
+ if (len > 20) \
+ { \
+ if (PUT (s, string, len) != len) \
+ return -1; \
+ done += len; \
+ string += len; \
+ } \
+ else \
+ while (len-- > 0) \
+ outchar (*string++); \
+ } while (0)
+
+/* Helper function to provide temporary buffering for unbuffered streams. */
+static int buffered_vfprintf __P ((FILE *stream, const char *fmt, va_list));
+
+/* Cast the next arg, of type ARGTYPE, into CASTTYPE, and put it in VAR. */
+#define castarg(var, argtype, casttype) \
+ var = (casttype) va_arg(args, argtype)
+/* Get the next arg, of type TYPE, and put it in VAR. */
+#define nextarg(var, type) castarg(var, type, type)
+
+static printf_function printf_unknown;
+
+extern printf_function **__printf_function_table;
+
+#ifdef __GNUC__
+#define HAVE_LONGLONG
+#define LONGLONG long long
+#else
+#define LONGLONG long
+#endif
+
+static char *group_number __P ((char *, char *, const char *, wchar_t));
+
+int
+DEFUN(vfprintf, (s, format, args),
+ register FILE *s AND CONST char *format AND va_list args)
+{
+ /* The character used as thousands separator. */
+ wchar_t thousands_sep;
+
+ /* The string describing the size of groups of digits. */
+ const char *grouping;
+
+ /* Pointer into the format string. */
+ register CONST char *f;
+
+ /* Number of characters written. */
+ register size_t done = 0;
+
+ ARGCHECK (s, format);
+
+ if (UNBUFFERED_P (s))
+ /* Use a helper function which will allocate a local temporary buffer
+ for the stream and then call us again. */
+ return buffered_vfprintf (s, format, args);
+
+ /* Reset multibyte characters to their initial state. */
+ (void) mblen ((char *) NULL, 0);
+
+ /* Figure out the thousands seperator character. */
+ if (mbtowc (&thousands_sep, _numeric_info->thousands_sep,
+ strlen (_numeric_info->thousands_sep)) <= 0)
+ thousands_sep = (wchar_t) *_numeric_info->thousands_sep;
+ grouping = _numeric_info->grouping; /* Cache the grouping info array. */
+ if (*grouping == '\0' || thousands_sep == L'\0')
+ grouping = NULL;
+
+ f = format;
+ while (*f != '\0')
+ {
+ /* Type modifiers. */
+ char is_short, is_long, is_long_double;
+#ifdef HAVE_LONGLONG
+ /* We use the `L' modifier for `long long int'. */
+#define is_longlong is_long_double
+#else
+#define is_longlong 0
+#endif
+ /* Format spec modifiers. */
+ char space, showsign, left, alt, group;
+
+ /* Padding character: ' ' or '0'. */
+ char pad;
+ /* Width of a field. */
+ register int width;
+ /* Precision of a field. */
+ int prec;
+
+ /* Decimal integer is negative. */
+ char is_neg;
+
+ /* Current character of the format. */
+ char fc;
+
+ /* Base of a number to be written. */
+ int base;
+ /* Integral values to be written. */
+ unsigned LONGLONG int num;
+ LONGLONG int signed_num;
+
+ /* String to be written. */
+ CONST char *str;
+ char errorbuf[1024]; /* Buffer sometimes used by %m. */
+
+ /* Auxiliary function to do output. */
+ printf_function *function;
+
+ if (!isascii(*f))
+ {
+ /* Non-ASCII, may be a multibyte. */
+ int len = mblen (f, strlen (f));
+ if (len > 0)
+ {
+ outstring (f, len);
+ continue;
+ }
+ }
+
+ if (*f != '%')
+ {
+ /* This isn't a format spec, so write everything out until the
+ next one. To properly handle multibyte characters, we cannot
+ just search for a '%'. Since multibyte characters are hairy
+ (and dealt with above), if we hit any byte above 127 (only
+ those can start a multibyte character) we just punt back to
+ that code. */
+ do
+ outchar (*f++);
+ while (*f != '\0' && *f != '%' && isascii (*f));
+ continue;
+ }
+
+ ++f;
+
+ /* Check for "%%". Note that although the ANSI standard lists
+ '%' as a conversion specifier, it says "The complete format
+ specification shall be `%%'," so we can avoid all the width
+ and precision processing. */
+ if (*f == '%')
+ {
+ ++f;
+ outchar('%');
+ continue;
+ }
+
+ /* Check for spec modifiers. */
+ space = showsign = left = alt = group = 0;
+ pad = ' ';
+ while (*f == ' ' || *f == '+' || *f == '-' || *f == '#' || *f == '0' ||
+ *f == '\'')
+ switch (*f++)
+ {
+ case ' ':
+ /* Output a space in place of a sign, when there is no sign. */
+ space = 1;
+ break;
+ case '+':
+ /* Always output + or - for numbers. */
+ showsign = 1;
+ break;
+ case '-':
+ /* Left-justify things. */
+ left = 1;
+ break;
+ case '#':
+ /* Use the "alternate form":
+ Hex has 0x or 0X, FP always has a decimal point. */
+ alt = 1;
+ break;
+ case '0':
+ /* Pad with 0s. */
+ pad = '0';
+ break;
+ case '\'':
+ /* Show grouping in numbers if the locale information
+ indicates any. */
+ group = 1;
+ break;
+ }
+ if (left)
+ pad = ' ';
+
+ /* Get the field width. */
+ width = 0;
+ if (*f == '*')
+ {
+ /* The field width is given in an argument.
+ A negative field width indicates left justification. */
+ nextarg(width, int);
+ if (width < 0)
+ {
+ width = - width;
+ left = 1;
+ }
+ ++f;
+ }
+ else
+ while (isdigit (*f))
+ {
+ width *= 10;
+ width += *f++ - '0';
+ }
+
+ /* Get the precision. */
+ /* -1 means none given; 0 means explicit 0. */
+ prec = -1;
+ if (*f == '.')
+ {
+ ++f;
+ if (*f == '*')
+ {
+ /* The precision is given in an argument. */
+ nextarg(prec, int);
+ /* Avoid idiocy. */
+ if (prec < 0)
+ prec = -1;
+ ++f;
+ }
+ else if (isdigit (*f))
+ {
+ prec = *f++ - '0';
+ while (*f != '\0' && isdigit (*f))
+ {
+ prec *= 10;
+ prec += *f++ - '0';
+ }
+ }
+ else
+ /* "%.?" is treated like "%.0?". */
+ prec = 0;
+ }
+
+ /* If there was a precision specified, ignore the 0 flag and always
+ pad with spaces. */
+ if (prec != -1)
+ pad = ' ';
+
+ /* Check for type modifiers. */
+ is_short = is_long = is_long_double = 0;
+ while (*f == 'h' || *f == 'l' || *f == 'L' || *f == 'q')
+ switch (*f++)
+ {
+ case 'h':
+ /* int's are short int's. */
+ is_short = 1;
+ break;
+ case 'l':
+#ifdef HAVE_LONGLONG
+ if (is_long)
+ /* A double `l' is equivalent to an `L'. */
+ is_longlong = 1;
+ else
+#endif
+ /* int's are long int's. */
+ is_long = 1;
+ break;
+ case 'L':
+ /* double's are long double's, and int's are long long int's. */
+ is_long_double = 1;
+ break;
+
+ case 'Z':
+ /* int's are size_t's. */
+#ifdef HAVE_LONGLONG
+ assert (sizeof(size_t) <= sizeof(unsigned long long int));
+ is_longlong = sizeof(size_t) > sizeof(unsigned long int);
+#endif
+ is_long = sizeof(size_t) > sizeof(unsigned int);
+ break;
+
+ case 'q':
+ /* 4.4 uses this for long long. */
+#ifdef HAVE_LONGLONG
+ is_longlong = 1;
+#else
+ is_long = 1;
+#endif
+ break;
+ }
+
+ /* Format specification. */
+ fc = *f++;
+ function = (__printf_function_table == NULL ? NULL :
+ __printf_function_table[fc]);
+ if (function == NULL)
+ switch (fc)
+ {
+ case 'i':
+ case 'd':
+ /* Decimal integer. */
+ base = 10;
+ if (is_longlong)
+ nextarg(signed_num, LONGLONG int);
+ else if (is_long)
+ nextarg(signed_num, long int);
+ else if (!is_short)
+ castarg(signed_num, int, long int);
+ else
+ castarg(signed_num, int, short int);
+
+ is_neg = signed_num < 0;
+ num = is_neg ? (- signed_num) : signed_num;
+ goto number;
+
+ case 'u':
+ /* Decimal unsigned integer. */
+ base = 10;
+ goto unsigned_number;
+
+ case 'o':
+ /* Octal unsigned integer. */
+ base = 8;
+ goto unsigned_number;
+
+ case 'X':
+ /* Hexadecimal unsigned integer. */
+ case 'x':
+ /* Hex with lower-case digits. */
+
+ base = 16;
+
+ unsigned_number:
+ /* Unsigned number of base BASE. */
+
+ if (is_longlong)
+ castarg(num, LONGLONG int, unsigned LONGLONG int);
+ else if (is_long)
+ castarg(num, long int, unsigned long int);
+ else if (!is_short)
+ castarg(num, int, unsigned int);
+ else
+ castarg(num, int, unsigned short int);
+
+ /* ANSI only specifies the `+' and
+ ` ' flags for signed conversions. */
+ is_neg = showsign = space = 0;
+
+ number:
+ /* Number of base BASE. */
+ {
+ char work[BUFSIZ];
+ char *CONST workend = &work[sizeof(work) - 1];
+ register char *w;
+
+ /* Supply a default precision if none was given. */
+ if (prec == -1)
+ prec = 1;
+
+ /* Put the number in WORK. */
+ w = _itoa (num, workend + 1, base, fc == 'X') - 1;
+ if (group && grouping)
+ w = group_number (w, workend, grouping, thousands_sep);
+ width -= workend - w;
+ prec -= workend - w;
+
+ if (alt && base == 8 && prec <= 0)
+ {
+ *w-- = '0';
+ --width;
+ }
+
+ if (prec > 0)
+ {
+ width -= prec;
+ while (prec-- > 0)
+ *w-- = '0';
+ }
+
+ if (alt && base == 16)
+ width -= 2;
+
+ if (is_neg || showsign || space)
+ --width;
+
+ if (!left && pad == ' ')
+ PAD (' ');
+
+ if (is_neg)
+ outchar('-');
+ else if (showsign)
+ outchar('+');
+ else if (space)
+ outchar(' ');
+
+ if (alt && base == 16)
+ {
+ outchar ('0');
+ outchar (fc);
+ }
+
+ if (!left && pad == '0')
+ PAD ('0');
+
+ /* Write the number. */
+ while (++w <= workend)
+ outchar(*w);
+
+ if (left)
+ PAD (' ');
+ }
+ break;
+
+ case 'e':
+ case 'E':
+ case 'f':
+ case 'g':
+ case 'G':
+ {
+ /* Floating-point number. */
+ extern printf_function __printf_fp;
+ function = __printf_fp;
+ goto use_function;
+ }
+
+ case 'c':
+ /* Character. */
+ nextarg(num, int);
+ if (!left)
+ {
+ --width;
+ PAD (' ');
+ }
+ outchar ((unsigned char) num);
+ if (left)
+ PAD (' ');
+ break;
+
+ case 's':
+ {
+ static CONST char null[] = "(null)";
+ size_t len;
+
+ nextarg(str, CONST char *);
+
+ string:
+
+ if (str == NULL)
+ /* Write "(null)" if there's space. */
+ if (prec == -1 || prec >= (int) sizeof(null) - 1)
+ {
+ str = null;
+ len = sizeof(null) - 1;
+ }
+ else
+ {
+ str = "";
+ len = 0;
+ }
+ else
+ len = strlen(str);
+
+ if (prec != -1 && (size_t) prec < len)
+ len = prec;
+ width -= len;
+
+ if (!left)
+ PAD (' ');
+ outstring (str, len);
+ if (left)
+ PAD (' ');
+ }
+ break;
+
+ case 'p':
+ /* Generic pointer. */
+ {
+ CONST PTR ptr;
+ nextarg(ptr, CONST PTR);
+ if (ptr != NULL)
+ {
+ /* If the pointer is not NULL, write it as a %#x spec. */
+ base = 16;
+ fc = 'x';
+ alt = 1;
+ num = (unsigned LONGLONG int) (unsigned long int) ptr;
+ is_neg = 0;
+ group = 0;
+ goto number;
+ }
+ else
+ {
+ /* Write "(nil)" for a nil pointer. */
+ static CONST char nil[] = "(nil)";
+ register CONST char *p;
+
+ width -= sizeof (nil) - 1;
+ if (!left)
+ PAD (' ');
+ for (p = nil; *p != '\0'; ++p)
+ outchar (*p);
+ if (left)
+ PAD (' ');
+ }
+ }
+ break;
+
+ case 'n':
+ /* Answer the count of characters written. */
+ if (is_longlong)
+ {
+ LONGLONG int *p;
+ nextarg(p, LONGLONG int *);
+ *p = done;
+ }
+ else if (is_long)
+ {
+ long int *p;
+ nextarg(p, long int *);
+ *p = done;
+ }
+ else if (!is_short)
+ {
+ int *p;
+ nextarg(p, int *);
+ *p = done;
+ }
+ else
+ {
+ short int *p;
+ nextarg(p, short int *);
+ *p = done;
+ }
+ break;
+
+ case 'm':
+ {
+ extern char *_strerror_internal __P ((int, char buf[1024]));
+ str = _strerror_internal (errno, errorbuf);
+ goto string;
+ }
+
+ default:
+ /* Unrecognized format specifier. */
+ function = printf_unknown;
+ goto use_function;
+ }
+ else
+ use_function:
+ {
+ int function_done;
+ struct printf_info info;
+
+ info.prec = prec;
+ info.width = width;
+ info.spec = fc;
+ info.is_long_double = is_long_double;
+ info.is_short = is_short;
+ info.is_long = is_long;
+ info.alt = alt;
+ info.space = space;
+ info.left = left;
+ info.showsign = showsign;
+ info.group = group;
+ info.pad = pad;
+
+ function_done = (*function) (s, &info, &args);
+ if (function_done < 0)
+ return -1;
+
+ done += function_done;
+ }
+ }
+
+ return done;
+}
+
+
+static int
+DEFUN(printf_unknown, (s, info, arg),
+ FILE *s AND CONST struct printf_info *info AND va_list *arg)
+{
+ int done = 0;
+ char work[BUFSIZ];
+ char *CONST workend = &work[sizeof(work) - 1];
+ register char *w;
+ register int prec = info->prec, width = info->width;
+
+ outchar('%');
+
+ if (info->alt)
+ outchar ('#');
+ if (info->group)
+ outchar ('\'');
+ if (info->showsign)
+ outchar ('+');
+ else if (info->space)
+ outchar (' ');
+ if (info->left)
+ outchar ('-');
+ if (info->pad == '0')
+ outchar ('0');
+
+ w = workend;
+ while (width > 0)
+ {
+ *w-- = '0' + (width % 10);
+ width /= 10;
+ }
+ while (++w <= workend)
+ outchar(*w);
+
+ if (info->prec != -1)
+ {
+ outchar('.');
+ w = workend;
+ while (prec > 0)
+ {
+ *w-- = '0' + (prec % 10);
+ prec /= 10;
+ }
+ while (++w <= workend)
+ outchar(*w);
+ }
+
+ outchar(info->spec);
+
+ return done;
+}
+
+/* Group the digits according to the grouping rules of the current locale.
+ The interpretation of GROUPING is as in `struct lconv' from <locale.h>. */
+
+static char *
+group_number (char *w, char *workend, const char *grouping,
+ wchar_t thousands_sep)
+{
+ int len;
+ char *src, *s;
+
+ /* We treat all negative values like CHAR_MAX. */
+
+ if (*grouping == CHAR_MAX || *grouping < 0)
+ /* No grouping should be done. */
+ return w;
+
+ len = *grouping;
+
+ /* Copy existing string so that nothing gets overwritten. */
+ src = (char *) alloca (workend - w);
+ memcpy (src, w + 1, workend - w);
+ s = &src[workend - w - 1];
+ w = workend;
+
+ /* Process all characters in the string. */
+ while (s >= src)
+ {
+ *w-- = *s--;
+
+ if (--len == 0 && s >= src)
+ {
+ /* A new group begins. */
+ *w-- = thousands_sep;
+
+ len = *grouping++;
+ if (*grouping == '\0')
+ /* The previous grouping repeats ad infinitum. */
+ --grouping;
+ else if (*grouping == CHAR_MAX || *grouping < 0)
+ {
+ /* No further grouping to be done.
+ Copy the rest of the number. */
+ do
+ *w-- = *s--;
+ while (s >= src);
+ break;
+ }
+ }
+ }
+
+ return w;
+}
+
+#ifdef USE_IN_LIBIO
+/* Helper "class" for `fprintf to unbuffered': creates a temporary buffer. */
+struct helper_file
+ {
+ struct _IO_FILE_plus _f;
+ _IO_FILE *_put_stream;
+ };
+
+static int
+DEFUN(_IO_helper_overflow, (s, c), _IO_FILE *s AND int c)
+{
+ _IO_FILE *target = ((struct helper_file*) s)->_put_stream;
+ int used = s->_IO_write_ptr - s->_IO_write_base;
+ if (used)
+ {
+ _IO_size_t written = _IO_sputn (target, s->_IO_write_base, used);
+ s->_IO_write_ptr -= written;
+ }
+ return _IO_putc (c, s);
+}
+
+static const struct _IO_jump_t _IO_helper_jumps =
+ {
+ _IO_helper_overflow,
+ _IO_default_underflow,
+ _IO_default_xsputn,
+ _IO_default_xsgetn,
+ _IO_default_read,
+ _IO_default_write,
+ _IO_default_doallocate,
+ _IO_default_pbackfail,
+ _IO_default_setbuf,
+ _IO_default_sync,
+ _IO_default_finish,
+ _IO_default_close,
+ _IO_default_stat,
+ _IO_default_seek,
+ _IO_default_seekoff,
+ _IO_default_seekpos,
+ _IO_default_uflow
+ };
+
+static int
+DEFUN(buffered_vfprintf, (s, format, args),
+ register _IO_FILE *s AND char CONST *format AND _IO_va_list args)
+{
+ char buf[_IO_BUFSIZ];
+ struct helper_file helper;
+ register _IO_FILE *hp = (_IO_FILE *) &helper;
+ int result, to_flush;
+
+ /* Initialize helper. */
+ helper._put_stream = s;
+ hp->_IO_write_base = buf;
+ hp->_IO_write_ptr = buf;
+ hp->_IO_write_end = buf + sizeof buf;
+ hp->_IO_file_flags = _IO_MAGIC|_IO_NO_READS;
+ hp->_jumps = (struct _IO_jump_t *) &_IO_helper_jumps;
+
+ /* Now print to helper instead. */
+ result = _IO_vfprintf (hp, format, args);
+
+ /* Now flush anything from the helper to the S. */
+ if ((to_flush = hp->_IO_write_ptr - hp->_IO_write_base) > 0)
+ {
+ if (_IO_sputn (s, hp->_IO_write_base, to_flush) != to_flush)
+ return -1;
+ }
+
+ return result;
+}
+
+#else /* !USE_IN_LIBIO */
+
+static int
+DEFUN(buffered_vfprintf, (s, format, args),
+ register FILE *s AND char CONST *format AND va_list args)
+{
+ char buf[BUFSIZ];
+ int result;
+
+ s->__bufp = s->__buffer = buf;
+ s->__bufsize = sizeof buf;
+ s->__put_limit = s->__buffer + s->__bufsize;
+ s->__get_limit = s->__buffer;
+
+ /* Now use buffer to print. */
+ result = vfprintf (s, format, args);
+
+ if (fflush (s) == EOF)
+ return -1;
+ s->__buffer = s->__bufp = s->__get_limit = s->__put_limit = NULL;
+ s->__bufsize = 0;
+
+ return result;
+}
+
+
+/* Pads string with given number of a specified character.
+ This code is taken from iopadn.c of the GNU I/O library. */
+#define PADSIZE 16
+static const char blanks[PADSIZE] =
+{' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' '};
+static const char zeroes[PADSIZE] =
+{'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0'};
+
+ssize_t
+__printf_pad (s, pad, count)
+ FILE *s;
+ char pad;
+ int count;
+{
+ CONST char *padptr;
+ register int i;
+ size_t written = 0, w;
+
+ padptr = pad == ' ' ? blanks : zeroes;
+
+ for (i = count; i >= PADSIZE; i -= PADSIZE)
+ {
+ w = PUT(s, padptr, PADSIZE);
+ written += w;
+ if (w != PADSIZE)
+ return written;
+ }
+ if (i > 0)
+ {
+ w = PUT(s, padptr, i);
+ written += w;
+ }
+ return written;
+}
+#undef PADSIZE
+#endif /* USE_IN_LIBIO */