From 36082a2fe36ecd800d784ae44c14f1f18c66a7e9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 28 Apr 2024 09:33:12 +0200 Subject: Adding upstream version 3.7.9. Signed-off-by: Daniel Baumann --- src/gl/vsnprintf.c | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 src/gl/vsnprintf.c (limited to 'src/gl/vsnprintf.c') diff --git a/src/gl/vsnprintf.c b/src/gl/vsnprintf.c new file mode 100644 index 0000000..7526108 --- /dev/null +++ b/src/gl/vsnprintf.c @@ -0,0 +1,70 @@ +/* Formatted output to strings. + Copyright (C) 2004, 2006-2021 Free Software Foundation, Inc. + Written by Simon Josefsson and Yoann Vandoorselaere . + + This program 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 3, or (at your option) + any later version. + + This program 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 this program; if not, see . */ + +#ifdef HAVE_CONFIG_H +# include +#endif + +/* Specification. */ +#include + +#include +#include +#include +#include +#include + +#include "vasnprintf.h" + +/* Print formatted output to string STR. Similar to vsprintf, but + additional length SIZE limit how much is written into STR. Returns + string length of formatted string (which may be larger than SIZE). + STR may be NULL, in which case nothing will be written. On error, + return a negative value. */ +int +vsnprintf (char *str, size_t size, const char *format, va_list args) +{ + char *output; + size_t len; + size_t lenbuf = size; + + output = vasnprintf (str, &lenbuf, format, args); + len = lenbuf; + + if (!output) + return -1; + + if (output != str) + { + if (size) + { + size_t pruned_len = (len < size ? len : size - 1); + memcpy (str, output, pruned_len); + str[pruned_len] = '\0'; + } + + free (output); + } + + if (len > INT_MAX) + { + errno = EOVERFLOW; + return -1; + } + + return len; +} -- cgit v1.2.3