| /* |
| * libcompat - system compatibility library |
| * |
| * Copyright © 1995 Ian Jackson <ian@chiark.greenend.org.uk> |
| * Copyright © 2008, 2009 Guillem Jover <guillem@debian.org> |
| * |
| * This 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 of the License, or |
| * (at your option) any later version. |
| * |
| * This 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 <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <config.h> |
| |
| #include <unistd.h> |
| #include <stdarg.h> |
| #include <stdio.h> |
| |
| #ifndef HAVE_VSNPRINTF |
| int |
| vsnprintf(char *buf, size_t maxsize, const char *fmt, va_list args) |
| { |
| static FILE *file = NULL; |
| |
| size_t want, nr; |
| int total; |
| |
| if (maxsize != 0 && buf == NULL) |
| return -1; |
| |
| if (!file) { |
| file = tmpfile(); |
| if (!file) |
| return -1; |
| } else { |
| if (fseek(file, 0, 0)) |
| return -1; |
| if (ftruncate(fileno(file), 0)) |
| return -1; |
| } |
| |
| total = vfprintf(file, fmt, args); |
| if (total < 0) |
| return -1; |
| if (maxsize == 0) |
| return total; |
| if (total >= (int)maxsize) |
| want = maxsize - 1; |
| else |
| want = total; |
| if (fflush(file)) |
| return -1; |
| if (fseek(file, 0, SEEK_SET)) |
| return -1; |
| |
| nr = fread(buf, 1, want, file); |
| if (nr != want) |
| return -1; |
| buf[want] = '\0'; |
| |
| return total; |
| } |
| #endif |
