1/* Test of vsnprintf() function. 2 Copyright (C) 2007 Free Software Foundation, Inc. 3 4 This program is free software: you can redistribute it and/or modify 5 it under the terms of the GNU General Public License as published by 6 the Free Software Foundation; either version 3 of the License, or 7 (at your option) any later version. 8 9 This program is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 GNU General Public License for more details. 13 14 You should have received a copy of the GNU General Public License 15 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 16 17/* Written by Bruno Haible <bruno@clisp.org>, 2007. */ 18 19#include <config.h> 20 21#include <stdio.h> 22 23#include <stdarg.h> 24#include <stdlib.h> 25#include <string.h> 26 27#define ASSERT(expr) \ 28 do \ 29 { \ 30 if (!(expr)) \ 31 { \ 32 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \ 33 abort (); \ 34 } \ 35 } \ 36 while (0) 37 38static int 39my_snprintf (char *buf, int size, const char *format, ...) 40{ 41 va_list args; 42 int ret; 43 44 va_start (args, format); 45 ret = vsnprintf (buf, size, format, args); 46 va_end (args); 47 return ret; 48} 49 50int 51main (int argc, char *argv[]) 52{ 53 char buf[8]; 54 int size; 55 int retval; 56 57 for (size = 0; size <= 8; size++) 58 { 59 memcpy (buf, "DEADBEEF", 8); 60 retval = my_snprintf (buf, size, "%d", 12345); 61 if (size < 6) 62 { 63#if CHECK_VSNPRINTF_POSIX 64 ASSERT (retval < 0 || retval >= size); 65#endif 66 if (size > 0) 67 { 68 ASSERT (memcmp (buf, "12345", size - 1) == 0); 69 ASSERT (buf[size - 1] == '\0' || buf[size - 1] == '0' + size); 70 } 71#if !CHECK_VSNPRINTF_POSIX 72 if (size > 0) 73#endif 74 ASSERT (memcmp (buf + size, "DEADBEEF" + size, 8 - size) == 0); 75 } 76 else 77 { 78 ASSERT (retval == 5); 79 ASSERT (memcmp (buf, "12345\0EF", 8) == 0); 80 } 81 } 82 83 return 0; 84} 85