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๐Ÿ”Ž Plugin that adds support for regular expressions in Pawn

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katursis/Pawn.Regex

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Pawn.Regex

๐Ÿ”Ž Plugin that adds support for regular expressions in Pawn

Why is it better than others plugins? Because it gives you an opportunity to get match groups.

Natives

native Regex:Regex_New(const pattern[], E_REGEX_FLAG:flags = REGEX_DEFAULT, E_REGEX_GRAMMAR:grammar = REGEX_ECMASCRIPT);
native Regex_Delete(&Regex:r);

native Regex_Check(const str[], Regex:r, E_MATCH_FLAG:flags = MATCH_DEFAULT);
native Regex_Match(const str[], Regex:r, &RegexMatch:m, E_MATCH_FLAG:flags = MATCH_DEFAULT);
native Regex_Search(const str[], Regex:r, &RegexMatch:m, &pos, startpos = 0, E_MATCH_FLAG:flags = MATCH_DEFAULT);
native Regex_Replace(const str[], Regex:r, const fmt[], dest[], E_MATCH_FLAG:flags = MATCH_DEFAULT, size = sizeof dest);

native Match_GetGroup(RegexMatch:m, index, dest[], &length, size = sizeof dest);
native Match_Free(&RegexMatch:m);

Examples

#include <Pawn.Regex>

stock IsRpNickname(const nickname[])
{
  static Regex:regex;
  if (!regex) regex = Regex_New("[A-Z][a-z]+_[A-Z][a-z]+");

  return Regex_Check(nickname, regex);
}

stock IsValidEmail(const email[])
{
  static Regex:regex;
  if (!regex) regex = Regex_New("^[\\w-\\.]+@([\\w-]+\\.)+[\\w-]{2,4}$");

  return Regex_Check(email, regex);
}

public OnPlayerCommandText(playerid, cmdtext[])
{
  static Regex:regex;
  if (!regex) regex = Regex_New("^\\/([\\w]+)\\s*(.+?)?\\s*$");

  new RegexMatch:match;
  if (!Regex_Match(cmdtext, regex, match)) return 0;

  new cmd[16], cmd_length;
  Match_GetGroup(match, 1, cmd, cmd_length);

  new params[256], params_length;
  Match_GetGroup(match, 2, params, params_length);

  printf("cmd '%s' (len %d), params '%s' (len %d)", cmd, cmd_length, params, params_length);

  Match_Free(match);

  return 1;
}

stock SplitAndPrint(const str[])
{
  static Regex:regex;
  if (!regex) regex = Regex_New("[^\\s]+");

  new RegexMatch:match, pos, startpos;
  while (Regex_Search(str, regex, match, pos, startpos))
  {
    new word[128], length;
    Match_GetGroup(match, 0, word, length);

    printf("word: %s, len: %d", word, length);

    startpos += pos + length;

    Match_Free(match);
  }
}

stock ReplaceString(const str[], const regexp[], const fmt[], dest[], size = sizeof dest)
{
  new Regex:regex = Regex_New(regexp);
  if (!regex) return;

  Regex_Replace(str, regex, fmt, dest, MATCH_DEFAULT, size);

  Regex_Delete(regex);
}

main()
{
  new str[256];

  ReplaceString("Regex.Pawn", "(.+)\\.(.+)", "$1.$2 => $2.$1", str);

  printf("%s", str);

  SplitAndPrint("4 8 15 16 23 42");

  OnPlayerCommandText(-1, "/ban 42");
  OnPlayerCommandText(-1, "/kill");

  printf("%d %d %d %d", IsRpNickname("Firstname_Lastname"), IsRpNickname("katursis"), IsValidEmail("katursis@example.com"), IsValidEmail("email.example.com"));
}