1/* Test of snprintf() 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 <stdlib.h> 24#include <string.h> 25 26#define ASSERT(expr) \ 27 do \ 28 { \ 29 if (!(expr)) \ 30 { \ 31 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \ 32 abort (); \ 33 } \ 34 } \ 35 while (0) 36 37int 38main (int argc, char *argv[]) 39{ 40 char buf[8]; 41 int size; 42 int retval; 43 44 for (size = 0; size <= 8; size++) 45 { 46 memcpy (buf, "DEADBEEF", 8); 47 retval = snprintf (buf, size, "%d", 12345); 48 if (size < 6) 49 { 50#if CHECK_SNPRINTF_POSIX 51 ASSERT (retval < 0 || retval >= size); 52#endif 53 if (size > 0) 54 { 55 ASSERT (memcmp (buf, "12345", size - 1) == 0); 56 ASSERT (buf[size - 1] == '\0' || buf[size - 1] == '0' + size); 57 } 58#if !CHECK_SNPRINTF_POSIX 59 if (size > 0) 60#endif 61 ASSERT (memcmp (buf + size, "DEADBEEF" + size, 8 - size) == 0); 62 } 63 else 64 { 65 ASSERT (retval == 5); 66 ASSERT (memcmp (buf, "12345\0EF", 8) == 0); 67 } 68 } 69 70 return 0; 71} 72