From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libiberty/vsnprintf.c | 148 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 libiberty/vsnprintf.c (limited to 'libiberty/vsnprintf.c') diff --git a/libiberty/vsnprintf.c b/libiberty/vsnprintf.c new file mode 100644 index 000000000..6c0afa672 --- /dev/null +++ b/libiberty/vsnprintf.c @@ -0,0 +1,148 @@ +/* Implement the vsnprintf function. + Copyright (C) 2003, 2004, 2005, 2011 Free Software Foundation, Inc. + Written by Kaveh R. Ghazi . + +This file is part of the libiberty library. This library is free +software; you can redistribute it and/or modify it under the +terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) +any later version. + +This 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 General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. + +As a special exception, if you link this library with files +compiled with a GNU compiler to produce an executable, this does not cause +the resulting executable to be covered by the GNU General Public License. +This exception does not however invalidate any other reasons why +the executable file might be covered by the GNU General Public License. */ + +/* + +@deftypefn Supplemental int vsnprintf (char *@var{buf}, size_t @var{n}, @ + const char *@var{format}, va_list @var{ap}) + +This function is similar to @code{vsprintf}, but it will write to +@var{buf} at most @code{@var{n}-1} bytes of text, followed by a +terminating null byte, for a total of @var{n} bytes. On error the +return value is -1, otherwise it returns the number of characters that +would have been printed had @var{n} been sufficiently large, +regardless of the actual value of @var{n}. Note some pre-C99 system +libraries do not implement this correctly so users cannot generally +rely on the return value if the system version of this function is +used. + +@end deftypefn + +*/ + +#include "config.h" +#include "ansidecl.h" + +#include +#ifdef HAVE_STRING_H +#include +#endif +#ifdef HAVE_STDLIB_H +#include +#endif + +#include "libiberty.h" + +/* This implementation relies on a working vasprintf. */ +int +vsnprintf (char *s, size_t n, const char *format, va_list ap) +{ + char *buf = 0; + int result = vasprintf (&buf, format, ap); + + if (!buf) + return -1; + if (result < 0) + { + free (buf); + return -1; + } + + result = strlen (buf); + if (n > 0) + { + if ((long) n > result) + memcpy (s, buf, result+1); + else + { + memcpy (s, buf, n-1); + s[n - 1] = 0; + } + } + free (buf); + return result; +} + +#ifdef TEST +/* Set the buffer to a known state. */ +#define CLEAR(BUF) do { memset ((BUF), 'X', sizeof (BUF)); (BUF)[14] = '\0'; } while (0) +/* For assertions. */ +#define VERIFY(P) do { if (!(P)) abort(); } while (0) + +static int ATTRIBUTE_PRINTF_3 +checkit (char *s, size_t n, const char *format, ...) +{ + int result; + VA_OPEN (ap, format); + VA_FIXEDARG (ap, char *, s); + VA_FIXEDARG (ap, size_t, n); + VA_FIXEDARG (ap, const char *, format); + result = vsnprintf (s, n, format, ap); + VA_CLOSE (ap); + return result; +} + +extern int main (void); +int +main (void) +{ + char buf[128]; + int status; + + CLEAR (buf); + status = checkit (buf, 10, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "foobar:9\0XXXXX\0", 15) == 0); + + CLEAR (buf); + status = checkit (buf, 9, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "foobar:9\0XXXXX\0", 15) == 0); + + CLEAR (buf); + status = checkit (buf, 8, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "foobar:\0XXXXXX\0", 15) == 0); + + CLEAR (buf); + status = checkit (buf, 7, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "foobar\0XXXXXXX\0", 15) == 0); + + CLEAR (buf); + status = checkit (buf, 6, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "fooba\0XXXXXXXX\0", 15) == 0); + + CLEAR (buf); + status = checkit (buf, 2, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "f\0XXXXXXXXXXXX\0", 15) == 0); + + CLEAR (buf); + status = checkit (buf, 1, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "\0XXXXXXXXXXXXX\0", 15) == 0); + + CLEAR (buf); + status = checkit (buf, 0, "%s:%d", "foobar", 9); + VERIFY (status==8 && memcmp (buf, "XXXXXXXXXXXXXX\0", 15) == 0); + + return 0; +} +#endif /* TEST */ -- cgit v1.2.3