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-rw-r--r--newlib/libc/include/stdio.h4
-rw-r--r--newlib/libc/stdio/Makefile.am3
-rw-r--r--newlib/libc/stdio/Makefile.in35
-rw-r--r--newlib/libc/stdio/fpurge.c90
-rw-r--r--newlib/libc/stdio/stdio.tex4
5 files changed, 127 insertions, 9 deletions
diff --git a/newlib/libc/include/stdio.h b/newlib/libc/include/stdio.h
index 6db5151ca..cf0be47b9 100644
--- a/newlib/libc/include/stdio.h
+++ b/newlib/libc/include/stdio.h
@@ -391,6 +391,7 @@ FILE * _EXFUN(_fopen_r, (struct _reent *, const char *, const char *));
FILE * _EXFUN(_freopen_r, (struct _reent *, const char *, const char *, FILE *));
int _EXFUN(_fprintf_r, (struct _reent *, FILE *, const char *, ...)
_ATTRIBUTE ((__format__ (__printf__, 3, 4))));
+int _EXFUN(_fpurge_r, (struct _reent *, FILE *));
int _EXFUN(_fputc_r, (struct _reent *, int, FILE *));
int _EXFUN(_fputs_r, (struct _reent *, const char *, FILE *));
size_t _EXFUN(_fread_r, (struct _reent *, _PTR, size_t _size, size_t _n, FILE *));
@@ -482,6 +483,9 @@ int _EXFUN(_vsprintf_r, (struct _reent *, char *, const char *, __VALIST)
int _EXFUN(_vsscanf_r, (struct _reent *, const char *, const char *, __VALIST)
_ATTRIBUTE ((__format__ (__scanf__, 3, 0))));
+/* Other extensions. */
+
+int _EXFUN(fpurge, (FILE *));
ssize_t _EXFUN(__getdelim, (char **, size_t *, int, FILE *));
ssize_t _EXFUN(__getline, (char **, size_t *, FILE *));
diff --git a/newlib/libc/stdio/Makefile.am b/newlib/libc/stdio/Makefile.am
index b5895833e..a1ba475df 100644
--- a/newlib/libc/stdio/Makefile.am
+++ b/newlib/libc/stdio/Makefile.am
@@ -121,6 +121,7 @@ ELIX_4_SOURCES = \
fgetws.c \
fmemopen.c \
fopencookie.c \
+ fpurge.c \
fputwc.c \
fputws.c \
funopen.c \
@@ -250,6 +251,7 @@ CHEWOUT_FILES = \
fmemopen.def \
fopen.def \
fopencookie.def \
+ fpurge.def \
fputc.def \
fputs.def \
fputwc.def \
@@ -331,6 +333,7 @@ $(lpfx)findfp.$(oext): local.h
$(lpfx)fmemopen.$(oext): local.h
$(lpfx)fopen.$(oext): local.h
$(lpfx)fopencookie.$(oext): local.h
+$(lpfx)fpurge.$(oext): local.h
$(lpfx)fputs.$(oext): fvwrite.h
$(lpfx)fputwc.$(oext): local.h
$(lpfx)fputws.$(oext): local.h fvwrite.h
diff --git a/newlib/libc/stdio/Makefile.in b/newlib/libc/stdio/Makefile.in
index 3dead2c65..3b593e23b 100644
--- a/newlib/libc/stdio/Makefile.in
+++ b/newlib/libc/stdio/Makefile.in
@@ -38,7 +38,6 @@ PRE_UNINSTALL = :
POST_UNINSTALL = :
build_triplet = @build@
host_triplet = @host@
-LIBOBJDIR =
DIST_COMMON = $(srcdir)/../../Makefile.shared $(srcdir)/Makefile.in \
$(srcdir)/Makefile.am
subdir = stdio
@@ -124,6 +123,7 @@ am__objects_1 = lib_a-clearerr.$(OBJEXT) lib_a-fclose.$(OBJEXT) \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fgetws.$(OBJEXT) \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fmemopen.$(OBJEXT) \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fopencookie.$(OBJEXT) \
+@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fpurge.$(OBJEXT) \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fputwc.$(OBJEXT) \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-fputws.$(OBJEXT) \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ lib_a-funopen.$(OBJEXT) \
@@ -178,6 +178,7 @@ am__objects_4 = clearerr.lo fclose.lo fdopen.lo feof.lo ferror.lo \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fgetws.lo \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fmemopen.lo \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fopencookie.lo \
+@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fpurge.lo \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputwc.lo \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputws.lo \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ funopen.lo \
@@ -263,6 +264,8 @@ ENABLE_NEWLIB_ICONV_TRUE = @ENABLE_NEWLIB_ICONV_TRUE@
EXEEXT = @EXEEXT@
FGREP = @FGREP@
GREP = @GREP@
+HAVE_LONG_DOUBLE_FALSE = @HAVE_LONG_DOUBLE_FALSE@
+HAVE_LONG_DOUBLE_TRUE = @HAVE_LONG_DOUBLE_TRUE@
HAVE_POSIX_DIR_FALSE = @HAVE_POSIX_DIR_FALSE@
HAVE_POSIX_DIR_TRUE = @HAVE_POSIX_DIR_TRUE@
HAVE_SIGNAL_DIR_FALSE = @HAVE_SIGNAL_DIR_FALSE@
@@ -329,8 +332,20 @@ STRIP = @STRIP@
USE_LIBTOOL_FALSE = @USE_LIBTOOL_FALSE@
USE_LIBTOOL_TRUE = @USE_LIBTOOL_TRUE@
VERSION = @VERSION@
+ac_ct_AR = @ac_ct_AR@
+ac_ct_AS = @ac_ct_AS@
ac_ct_CC = @ac_ct_CC@
+ac_ct_DLLTOOL = @ac_ct_DLLTOOL@
+ac_ct_DSYMUTIL = @ac_ct_DSYMUTIL@
ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
+ac_ct_LIPO = @ac_ct_LIPO@
+ac_ct_NMEDIT = @ac_ct_NMEDIT@
+ac_ct_OBJDUMP = @ac_ct_OBJDUMP@
+ac_ct_OTOOL = @ac_ct_OTOOL@
+ac_ct_OTOOL64 = @ac_ct_OTOOL64@
+ac_ct_RANLIB = @ac_ct_RANLIB@
+ac_ct_READELF = @ac_ct_READELF@
+ac_ct_STRIP = @ac_ct_STRIP@
aext = @aext@
am__fastdepCC_FALSE = @am__fastdepCC_FALSE@
am__fastdepCC_TRUE = @am__fastdepCC_TRUE@
@@ -346,9 +361,6 @@ build_cpu = @build_cpu@
build_os = @build_os@
build_vendor = @build_vendor@
datadir = @datadir@
-datarootdir = @datarootdir@
-docdir = @docdir@
-dvidir = @dvidir@
exec_prefix = @exec_prefix@
extra_dir = @extra_dir@
host = @host@
@@ -356,14 +368,12 @@ host_alias = @host_alias@
host_cpu = @host_cpu@
host_os = @host_os@
host_vendor = @host_vendor@
-htmldir = @htmldir@
includedir = @includedir@
infodir = @infodir@
install_sh = @install_sh@
libdir = @libdir@
libexecdir = @libexecdir@
libm_machine_dir = @libm_machine_dir@
-localedir = @localedir@
localstatedir = @localstatedir@
lpfx = @lpfx@
lt_ECHO = @lt_ECHO@
@@ -373,10 +383,8 @@ mkdir_p = @mkdir_p@
newlib_basedir = @newlib_basedir@
oext = @oext@
oldincludedir = @oldincludedir@
-pdfdir = @pdfdir@
prefix = @prefix@
program_transform_name = @program_transform_name@
-psdir = @psdir@
sbindir = @sbindir@
sharedstatedir = @sharedstatedir@
subdirs = @subdirs@
@@ -488,6 +496,7 @@ GENERAL_SOURCES = \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fgetws.c \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fmemopen.c \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fopencookie.c \
+@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fpurge.c \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputwc.c \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ fputws.c \
@ELIX_LEVEL_1_FALSE@@ELIX_LEVEL_2_FALSE@@ELIX_LEVEL_3_FALSE@ funopen.c \
@@ -558,6 +567,7 @@ CHEWOUT_FILES = \
fmemopen.def \
fopen.def \
fopencookie.def \
+ fpurge.def \
fputc.def \
fputs.def \
fputwc.def \
@@ -1268,6 +1278,12 @@ lib_a-fopencookie.o: fopencookie.c
lib_a-fopencookie.obj: fopencookie.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fopencookie.obj `if test -f 'fopencookie.c'; then $(CYGPATH_W) 'fopencookie.c'; else $(CYGPATH_W) '$(srcdir)/fopencookie.c'; fi`
+lib_a-fpurge.o: fpurge.c
+ $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fpurge.o `test -f 'fpurge.c' || echo '$(srcdir)/'`fpurge.c
+
+lib_a-fpurge.obj: fpurge.c
+ $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fpurge.obj `if test -f 'fpurge.c'; then $(CYGPATH_W) 'fpurge.c'; else $(CYGPATH_W) '$(srcdir)/fpurge.c'; fi`
+
lib_a-fputwc.o: fputwc.c
$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) $(CPPFLAGS) $(lib_a_CFLAGS) $(CFLAGS) -c -o lib_a-fputwc.o `test -f 'fputwc.c' || echo '$(srcdir)/'`fputwc.c
@@ -1413,7 +1429,7 @@ clean-libtool:
-rm -rf .libs _libs
distclean-libtool:
- -rm -f libtool config.lt
+ -rm -f libtool
uninstall-info-am:
ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
@@ -1627,6 +1643,7 @@ $(lpfx)findfp.$(oext): local.h
$(lpfx)fmemopen.$(oext): local.h
$(lpfx)fopen.$(oext): local.h
$(lpfx)fopencookie.$(oext): local.h
+$(lpfx)fpurge.$(oext): local.h
$(lpfx)fputs.$(oext): fvwrite.h
$(lpfx)fputwc.$(oext): local.h
$(lpfx)fputws.$(oext): local.h fvwrite.h
diff --git a/newlib/libc/stdio/fpurge.c b/newlib/libc/stdio/fpurge.c
new file mode 100644
index 000000000..41228efd7
--- /dev/null
+++ b/newlib/libc/stdio/fpurge.c
@@ -0,0 +1,90 @@
+/* Copyright (C) 2009 Eric Blake
+ * Permission to use, copy, modify, and distribute this software
+ * is freely granted, provided that this notice is preserved.
+ */
+
+/*
+FUNCTION
+<<fpurge>>---discard pending file I/O
+
+INDEX
+ fpurge
+INDEX
+ _fpurge_r
+
+ANSI_SYNOPSIS
+ #include <stdio.h>
+ int fpurge(FILE *<[fp]>);
+
+ int _fpurge_r(struct _reent *<[reent]>, FILE *<[fp]>);
+
+DESCRIPTION
+Use <<fpurge>> to clear all buffers of the given stream. For output
+streams, this discards data not yet written to disk. For input streams,
+this discards any data from <<ungetc>> and any data retrieved from disk
+but not yet read via <<getc>>. This is more severe than <<fflush>>,
+and generally is only needed when manually altering the underlying file
+descriptor of a stream.
+
+The alternate function <<_fpurge_r>> is a reentrant version, where the
+extra argument <[reent]> is a pointer to a reentrancy structure, and
+<[fp]> must not be NULL.
+
+RETURNS
+<<fpurge>> returns <<0>> unless <[fp]> is not valid, in which case it
+returns <<EOF>> and sets <<errno>>.
+
+PORTABILITY
+These functions are not portable to any standard.
+
+No supporting OS subroutines are required.
+*/
+
+#include <_ansi.h>
+#include <stdio.h>
+#include <errno.h>
+#include "local.h"
+
+/* Discard I/O from a single file. */
+
+int
+_DEFUN(_fpurge_r, (ptr, fp),
+ struct _reent *ptr _AND
+ register FILE * fp)
+{
+ int t;
+
+ CHECK_INIT (ptr, fp);
+
+ _flockfile (fp);
+
+ t = fp->_flags;
+ if (!t)
+ {
+ ptr->_errno = EBADF;
+ _funlockfile (fp);
+ return EOF;
+ }
+ fp->_p = fp->_bf._base;
+ if ((t & __SWR) == 0)
+ {
+ fp->_r = 0;
+ if (HASUB (fp))
+ FREEUB (ptr, fp);
+ }
+ else
+ fp->_w = t & (__SLBF | __SNBF) ? 0 : fp->_bf._size;
+ _funlockfile (fp);
+ return 0;
+}
+
+#ifndef _REENT_ONLY
+
+int
+_DEFUN(fpurge, (fp),
+ register FILE * fp)
+{
+ return _fpurge_r (_REENT, fp);
+}
+
+#endif /* _REENT_ONLY */
diff --git a/newlib/libc/stdio/stdio.tex b/newlib/libc/stdio/stdio.tex
index 28feffbcc..2088d74ed 100644
--- a/newlib/libc/stdio/stdio.tex
+++ b/newlib/libc/stdio/stdio.tex
@@ -42,6 +42,7 @@ structure.
* fmemopen:: Open a stream around a fixed-length buffer
* fopen:: Open a file
* fopencookie:: Open a stream with custom callbacks
+* fpurge:: Discard all pending I/O on a stream
* fputc:: Write a character on a stream or file
* fputs:: Write a character string in a file or stream
* fputwc:: Write a wide character to a file or stream
@@ -153,6 +154,9 @@ structure.
@include stdio/fopencookie.def
@page
+@include stdio/fpurge.def
+
+@page
@include stdio/fputc.def
@page
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-01 19:06:27 +0000