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  1. #include <stdio.h>
  2. #include <regex.h>
  3.  
  4. int main()
  5. {
  6.     const char *data = "dGVzdHRlc3Q=";
  7.     regex_t regex;
  8.  
  9.     int ret = regcomp(&regex, "^([A-Za-z0-9+/]{4})*([A-Za-z0-9+/]{4}|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{2}==)?$", REG_EXTENDED);
  10.     if (ret)
  11.     {
  12.         printf("Could not compile regex\n");
  13.         return 1;
  14.     }
  15.  
  16.     ret = regexec(&regex, data, 0, NULL, 0);
  17.     if (!ret)
  18.         printf("Match\n");
  19.     else if (ret == REG_NOMATCH)
  20.         printf("No match\n");
  21.  
  22.     regfree(&regex);
  23.     return 0;
  24. }
Success #stdin #stdout 0s 5648KB
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https://ideone.com/ei2F07
language:
C (gcc 8.3)
created:
4 years ago
visibility:
secret

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