test/clib/snprintf.c

   1 #include "test.h"
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 #define TESTSTRING "test"
   6 #define TESTSTRING2 "123456789"
   7 #define TESTSTRING3 "0123456789"
   8 #define TESTSTRING4 "a long test string"
   9
  10 #define BUFSIZE 10
  11
  12 int main()
  13 {
  14     char buf[BUFSIZE+1] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
  15
  16     /* first check strings shorter than buffer */
  17     TEST((snprintf(buf, BUFSIZE, "%s", TESTSTRING) == strlen(TESTSTRING)));
  18     TEST((buf[strlen(TESTSTRING)] == 0));
  19     TEST((buf[strlen(TESTSTRING) + 1] == (char) 0xff));
  20
  21     /* now strings with length equal to buffer size - 1 */
  22     TEST((snprintf(buf, BUFSIZE, "%s", TESTSTRING2) == strlen(TESTSTRING2)));
  23     TEST((buf[strlen(TESTSTRING2)] == 0));
  24     TEST((buf[BUFSIZE] == (char) 0xff));
  25
  26     /* now strings with length equal to buffer size (no zero byte written) */
  27     TEST((snprintf(buf, BUFSIZE, "%s", TESTSTRING3) == strlen(TESTSTRING3)));
  28     TEST((buf[BUFSIZE-1] == TESTSTRING3[strlen(TESTSTRING3)-1]));
  29     TEST((buf[BUFSIZE] == (char) 0xff));
  30
  31     /* now strings longer than buffer size */
  32     TEST((snprintf(buf, BUFSIZE, "%s", TESTSTRING4) == strlen(TESTSTRING4)));
  33     TEST((buf[BUFSIZE-1] == TESTSTRING4[BUFSIZE-1]));
  34     TEST((buf[BUFSIZE] == (char) 0xff));
  35     return OK;
  36 }
  37
  38 void cleanup()
  39 {
  40
  41 }