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[BZ #713]
2005-09-26 Ulrich Drepper <drepper@redhat.com> [BZ #713] * libio/iofgets.c: Treat N==1 correctly. * libio/iofgets_u.c: Likewise. * libio/iofgetws.c: Likewise. * libio/iofgetws_u.c: Likewise. * stdio-common/Makefile (tests): Add tst-fgets. * stdio-common/tst-fgets.c: New file.
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Ulrich Drepper
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ChangeLog
10
ChangeLog
@ -1,3 +1,13 @@
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2005-09-26 Ulrich Drepper <drepper@redhat.com>
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[BZ #713]
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* libio/iofgets.c: Treat N==1 correctly.
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* libio/iofgets_u.c: Likewise.
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* libio/iofgetws.c: Likewise.
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* libio/iofgetws_u.c: Likewise.
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* stdio-common/Makefile (tests): Add tst-fgets.
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* stdio-common/tst-fgets.c: New file.
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2005-01-11 Thorsten Kukuk <kukuk@suse.de>
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[BZ #652]
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003
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/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2002, 2003, 2005
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@ -41,6 +41,14 @@ _IO_fgets (buf, n, fp)
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CHECK_FILE (fp, NULL);
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if (n <= 0)
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return NULL;
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if (__builtin_expect (n == 1, 0))
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{
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/* Another irregular case: since we have to store a NUL byte and
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there is only room for exactly one byte, we don't have to
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read anything. */
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buf[0] = '\0';
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return buf;
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}
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_IO_acquire_lock (fp);
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/* This is very tricky since a file descriptor may be in the
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non-blocking mode. The error flag doesn't mean much in this
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993,1995,1996,1997,1998,2002 Free Software Foundation, Inc.
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/* Copyright (C) 1993,1995-1998,2002,2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -40,6 +40,14 @@ fgets_unlocked (buf, n, fp)
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CHECK_FILE (fp, NULL);
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if (n <= 0)
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return NULL;
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if (__builtin_expect (n == 1, 0))
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{
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/* Another irregular case: since we have to store a NUL byte and
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there is only room for exactly one byte, we don't have to
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read anything. */
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buf[0] = '\0';
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return buf;
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}
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/* This is very tricky since a file descriptor may be in the
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non-blocking mode. The error flag doesn't mean much in this
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case. We return an error only when there is a new error. */
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2001
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/* Copyright (C) 1993, 1995, 1996, 1997, 1998, 1999, 2001, 2005
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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@ -41,6 +41,14 @@ fgetws (buf, n, fp)
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CHECK_FILE (fp, NULL);
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if (n <= 0)
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return NULL;
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if (__builtin_expect (n == 1, 0))
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{
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/* Another irregular case: since we have to store a NUL byte and
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there is only room for exactly one byte, we don't have to
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read anything. */
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buf[0] = L'\0';
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return buf;
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}
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_IO_acquire_lock (fp);
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/* This is very tricky since a file descriptor may be in the
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non-blocking mode. The error flag doesn't mean much in this
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@ -1,4 +1,4 @@
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/* Copyright (C) 1993, 95, 96, 97, 98, 99 Free Software Foundation, Inc.
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/* Copyright (C) 1993, 95, 96, 97, 98, 99, 2005 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -40,6 +40,14 @@ fgetws_unlocked (buf, n, fp)
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CHECK_FILE (fp, NULL);
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if (n <= 0)
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return NULL;
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if (__builtin_expect (n == 1, 0))
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{
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/* Another irregular case: since we have to store a NUL byte and
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there is only room for exactly one byte, we don't have to
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read anything. */
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buf[0] = L'\0';
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return buf;
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}
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/* This is very tricky since a file descriptor may be in the
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non-blocking mode. The error flag doesn't mean much in this
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case. We return an error only when there is a new error. */
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@ -1,4 +1,5 @@
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/* Copyright (C) 1993,1997,1998,2000,2001,2002 Free Software Foundation, Inc.
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/* Copyright (C) 1993,1997,1998,2000,2001,2002,2005
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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@ -73,7 +74,8 @@ _IO_getline_info (fp, buf, n, delim, extract_delim, eof)
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int c = __uflow (fp);
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if (c == EOF)
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{
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if (eof) *eof = c;
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if (eof)
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*eof = c;
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break;
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}
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if (c == delim)
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@ -89,31 +91,31 @@ _IO_getline_info (fp, buf, n, delim, extract_delim, eof)
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*ptr++ = c;
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n--;
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}
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else
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{
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char *t;
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if ((_IO_size_t) len >= n)
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len = n;
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t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len);
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if (t != NULL)
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{
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_IO_size_t old_len = ptr-buf;
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len = t - fp->_IO_read_ptr;
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if (extract_delim >= 0)
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{
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++t;
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if (extract_delim > 0)
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++len;
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}
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memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
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fp->_IO_read_ptr = t;
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return old_len + len;
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}
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memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
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fp->_IO_read_ptr += len;
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ptr += len;
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n -= len;
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}
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else
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{
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char *t;
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if ((_IO_size_t) len >= n)
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len = n;
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t = (char *) memchr ((void *) fp->_IO_read_ptr, delim, len);
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if (t != NULL)
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{
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_IO_size_t old_len = ptr-buf;
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len = t - fp->_IO_read_ptr;
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if (extract_delim >= 0)
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{
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++t;
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if (extract_delim > 0)
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++len;
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}
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memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
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fp->_IO_read_ptr = t;
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return old_len + len;
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}
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memcpy ((void *) ptr, (void *) fp->_IO_read_ptr, len);
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fp->_IO_read_ptr += len;
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ptr += len;
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n -= len;
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}
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}
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return ptr - buf;
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}
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@ -53,7 +53,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
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scanf11 scanf12 tst-tmpnam tst-cookie tst-obprintf tst-sscanf \
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tst-swprintf tst-fseek tst-fmemopen test-vfprintf tst-gets \
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tst-perror tst-sprintf tst-rndseek tst-fdopen tst-fphex bug14 bug15 \
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tst-popen tst-unlockedio tst-fmemopen2 tst-put-error
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tst-popen tst-unlockedio tst-fmemopen2 tst-put-error tst-fgets
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test-srcs = tst-unbputc tst-printf
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20
stdio-common/tst-fgets.c
Normal file
20
stdio-common/tst-fgets.c
Normal file
@ -0,0 +1,20 @@
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/* Derived from the test case in
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http://sourceware.org/bugzilla/show_bug.cgi?id=713. */
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#include <stdio.h>
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static int
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do_test (void)
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{
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FILE *fp = fmemopen ("hello", 5, "r");
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char buf[2];
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char *bp = fgets (buf, sizeof (buf), fp);
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printf ("fgets: %s\n", bp == buf ? "OK" : "ERROR");
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int res = bp != buf;
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bp = fgets_unlocked (buf, sizeof (buf), fp);
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printf ("fgets_unlocked: %s\n", bp == buf ? "OK" : "ERROR");
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res |= bp != buf;
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return res;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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