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author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-11 10:45:00 +0000 |
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committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-11 10:45:00 +0000 |
commit | 24d1733e78a17d71aea6912144394ed7d3a82d50 (patch) | |
tree | 069608d934a8716d55a94c62c4bd75c1152f868c /gnu/snprintf.c | |
parent | d7b9fe130c2305d44fa1023283d3c2fcd389ba93 (diff) | |
download | m4-24d1733e78a17d71aea6912144394ed7d3a82d50.tar.gz |
remove .gitignores and add the rest of the files
Diffstat (limited to 'gnu/snprintf.c')
-rwxr-xr-x | gnu/snprintf.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/gnu/snprintf.c b/gnu/snprintf.c new file mode 100755 index 00000000..810ca14b --- /dev/null +++ b/gnu/snprintf.c @@ -0,0 +1,72 @@ +/* Formatted output to strings. + Copyright (C) 2004, 2006-2010 Free Software Foundation, Inc. + Written by Simon Josefsson and Paul Eggert. + + 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, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#include <config.h> + +/* Specification. */ +#include <stdio.h> + +#include <errno.h> +#include <limits.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> + +#include "vasnprintf.h" + +/* Print formatted output to string STR. Similar to sprintf, 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 +snprintf (char *str, size_t size, const char *format, ...) +{ + char *output; + size_t len; + size_t lenbuf = size; + va_list args; + + va_start (args, format); + output = vasnprintf (str, &lenbuf, format, args); + len = lenbuf; + va_end (args); + + 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 (INT_MAX < len) + { + errno = EOVERFLOW; + return -1; + } + + return len; +} |