diff options
author | Uros Bizjak <ubizjak@gmail.com> | 2014-12-11 09:15:37 +0100 |
---|---|---|
committer | Uros Bizjak <uros@gcc.gnu.org> | 2014-12-11 09:15:37 +0100 |
commit | 01ca36af914385acfc864adfae6923768581888a (patch) | |
tree | 73160bf616558a6ddfc1ac73519216a81c9d0e8a /libiberty/vprintf-support.c | |
parent | c168eab92cc42d3c995cc0a1188e1554ebbcd63a (diff) | |
download | gcc-01ca36af914385acfc864adfae6923768581888a.zip gcc-01ca36af914385acfc864adfae6923768581888a.tar.gz gcc-01ca36af914385acfc864adfae6923768581888a.tar.bz2 |
xvasprintf.c: New file.
* xvasprintf.c: New file.
* vprintf-support.h: Likewise.
* vprintf-support.c: Likewise.
* Makefile.in (CFILES): Add vprintf-support.c, xvasprintf.c.
(REQUIRED_OFILES): Add vprintf-support.$(objext), xvasprintf.$(objext).
(vprintf-support.$(objext), xvasprintf.$(objext)): New targets.
(vasprintf.$(objext)): Depend on $(srcdir)/vprintf-support.h.
* functions.texi: Regenerate.
* vasprintf.c (int_vasprintf): Use libiberty_vprintf_buffer_size.
include/ChangeLog:
* libiberty.h (xvasprintf): Declare.
libcpp/ChangeLog:
* directives.c (cpp_define_formatted): Use xvasprintf.
Co-Authored-By: Ben Elliston <bje@au.ibm.com>
Co-Authored-By: Manuel López-Ibáñez <manu@gcc.gnu.org>
From-SVN: r218618
Diffstat (limited to 'libiberty/vprintf-support.c')
-rw-r--r-- | libiberty/vprintf-support.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libiberty/vprintf-support.c b/libiberty/vprintf-support.c new file mode 100644 index 0000000..171232f --- /dev/null +++ b/libiberty/vprintf-support.c @@ -0,0 +1,119 @@ +/* Estimate the length of the string generated by a vprintf-like + function. Used by vasprintf and xvasprintf. + Copyright (C) 1994, 2003, 2011, 2013, 2014 Free Software Foundation, Inc. + +This file is part of the libiberty library. +Libiberty 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. + +Libiberty 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 libiberty; see the file COPYING.LIB. If not, write +to the Free Software Foundation, Inc., 51 Franklin Street - Fifth +Floor, Boston, MA 02110-1301, USA. */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif +#include <ansidecl.h> +#include <stdarg.h> +#if !defined (va_copy) && defined (__va_copy) +# define va_copy(d,s) __va_copy((d),(s)) +#endif +#include <stdio.h> +#ifdef HAVE_STRING_H +#include <string.h> +#endif +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#else +extern unsigned long strtoul (); +#endif +#include "libiberty.h" + +int +libiberty_vprintf_buffer_size (const char *format, va_list args) +{ + const char *p = format; + /* Add one to make sure that it is never zero, which might cause malloc + to return NULL. */ + int total_width = strlen (format) + 1; + va_list ap; + +#ifdef va_copy + va_copy (ap, args); +#else + memcpy ((PTR) &ap, (PTR) &args, sizeof (va_list)); +#endif + + while (*p != '\0') + { + if (*p++ == '%') + { + while (strchr ("-+ #0", *p)) + ++p; + if (*p == '*') + { + ++p; + total_width += abs (va_arg (ap, int)); + } + else + total_width += strtoul (p, (char **) &p, 10); + if (*p == '.') + { + ++p; + if (*p == '*') + { + ++p; + total_width += abs (va_arg (ap, int)); + } + else + total_width += strtoul (p, (char **) &p, 10); + } + while (strchr ("hlL", *p)) + ++p; + /* Should be big enough for any format specifier except %s and floats. */ + total_width += 30; + switch (*p) + { + case 'd': + case 'i': + case 'o': + case 'u': + case 'x': + case 'X': + case 'c': + (void) va_arg (ap, int); + break; + case 'f': + case 'e': + case 'E': + case 'g': + case 'G': + (void) va_arg (ap, double); + /* Since an ieee double can have an exponent of 307, we'll + make the buffer wide enough to cover the gross case. */ + total_width += 307; + break; + case 's': + total_width += strlen (va_arg (ap, char *)); + break; + case 'p': + case 'n': + (void) va_arg (ap, char *); + break; + } + p++; + } + } +#ifdef va_copy + va_end (ap); +#endif + return total_width; +} |