| 1 | function substr() |
| 2 | { |
| 3 | var str = argument[0]; |
| 4 | var pos = argument[1]; |
| 5 | if (pos < 0) |
| 6 | pos = strlen(str) + 1 + pos; |
| 7 | var len; |
| 8 | if (argument_count == 2) |
| 9 | len = (strlen(str) - pos) + 1; |
| 10 | else |
| 11 | len = argument[2]; |
| 12 | if (len > 0) |
| 13 | return string_copy(str, pos, len); |
| 14 | else |
| 15 | return ""; |
| 16 | } |