t/helper/test-regex.c

   1 #include "test-tool.h"
   2 #include "git-compat-util.h"
   3 #include "gettext.h"
   4
   5 struct reg_flag {
   6         const char *name;
   7         int flag;
   8 };
   9
  10 static struct reg_flag reg_flags[] = {
  11         { "EXTENDED",    REG_EXTENDED   },
  12         { "NEWLINE",     REG_NEWLINE    },
  13         { "ICASE",       REG_ICASE      },
  14         { "NOTBOL",      REG_NOTBOL     },
  15 #ifdef REG_STARTEND
  16         { "STARTEND",    REG_STARTEND   },
  17 #endif
  18         { NULL, 0 }
  19 };
  20
  21 static int test_regex_bug(void)
  22 {
  23         char *pat = "[^={} \t]+";
  24         char *str = "={}\nfred";
  25         regex_t r;
  26         regmatch_t m[1];
  27
  28         if (regcomp(&r, pat, REG_EXTENDED | REG_NEWLINE))
  29                 die("failed regcomp() for pattern '%s'", pat);
  30         if (regexec(&r, str, 1, m, 0))
  31                 die("no match of pattern '%s' to string '%s'", pat, str);
  32
  33         /* http://sourceware.org/bugzilla/show_bug.cgi?id=3957  */
  34         if (m[0].rm_so == 3) /* matches '\n' when it should not */
  35                 die("regex bug confirmed: re-build git with NO_REGEX=1");
  36
  37         return 0;
  38 }
  39
  40 int cmd__regex(int argc, const char **argv)
  41 {
  42         const char *pat;
  43         const char *str;
  44         int flags = 0;
  45         regex_t r;
  46         regmatch_t m[1];
  47
  48         if (argc == 2 && !strcmp(argv[1], "--bug"))
  49                 return test_regex_bug();
  50         else if (argc < 3)
  51                 usage("test-tool regex --bug\n"
  52                       "test-tool regex <pattern> <string> [<options>]");
  53
  54         argv++;
  55         pat = *argv++;
  56         str = *argv++;
  57         while (*argv) {
  58                 struct reg_flag *rf;
  59                 for (rf = reg_flags; rf->name; rf++)
  60                         if (!strcmp(*argv, rf->name)) {
  61                                 flags |= rf->flag;
  62                                 break;
  63                         }
  64                 if (!rf->name)
  65                         die("do not recognize %s", *argv);
  66                 argv++;
  67         }
  68         git_setup_gettext();
  69
  70         if (regcomp(&r, pat, flags))
  71                 die("failed regcomp() for pattern '%s'", pat);
  72         if (regexec(&r, str, 1, m, 0))
  73                 return 1;
  74
  75         return 0;
  76 }