src/functional/string_strstr.c

   1 #include <string.h>
   2 #include "test.h"
   3
   4 #define N(s, sub) { \
   5         char *p = s; \
   6         char *q = strstr(p, sub); \
   7         if (q) \
   8                 t_error("strstr(%s,%s) returned str+%d, wanted 0\n", #s, #sub, q-p); \
   9 }
  10
  11 #define T(s, sub, n) { \
  12         char *p = s; \
  13         char *q = strstr(p, sub); \
  14         if (q == 0) \
  15                 t_error("strstr(%s,%s) returned 0, wanted str+%d\n", #s, #sub, n); \
  16         else if (q - p != n) \
  17                 t_error("strstr(%s,%s) returned str+%d, wanted str+%d\n", #s, #sub, q-p, n); \
  18 }
  19
  20 int main(void)
  21 {
  22         N("", "a")
  23         N("a", "aa")
  24         N("a", "b")
  25         N("aa", "ab")
  26         N("aa", "aaa")
  27         N("abba", "aba")
  28         N("abc abc", "abcd")
  29         N("0-1-2-3-4-5-6-7-8-9", "-3-4-56-7-8-")
  30         N("0-1-2-3-4-5-6-7-8-9", "-3-4-5+6-7-8-")
  31         N("_ _ _\xff_ _ _", "_\x7f_")
  32         N("_ _ _\x7f_ _ _", "_\xff_")
  33
  34         T("", "", 0)
  35         T("abcd", "", 0)
  36         T("abcd", "a", 0)
  37         T("abcd", "b", 1)
  38         T("abcd", "c", 2)
  39         T("abcd", "d", 3)
  40         T("abcd", "ab", 0)
  41         T("abcd", "bc", 1)
  42         T("abcd", "cd", 2)
  43         T("ababa", "baba", 1)
  44         T("ababab", "babab", 1)
  45         T("abababa", "bababa", 1)
  46         T("abababab", "bababab", 1)
  47         T("ababababa", "babababa", 1)
  48         T("abbababab", "bababa", 2)
  49         T("abbababab", "ababab", 3)
  50         T("abacabcabcab", "abcabcab", 4)
  51         T("nanabanabanana", "aba", 3)
  52         T("nanabanabanana", "ban", 4)
  53         T("nanabanabanana", "anab", 1)
  54         T("nanabanabanana", "banana", 8)
  55         T("_ _\xff_ _", "_\xff_", 2)
  56
  57         return t_status;
  58 }