t/helper/test-regex.c

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