Mangle types are used by:
All characters are grouped into one of 9 “types”:
| Type number | Description | ASCII characters |
|---|---|---|
| 0 | Normal chars | 32-127, 160-255 |
| 1 | High bit control chars | 128-159 |
| 2 | Escape char | ^[ |
| 3 | Color char | ^C |
| 4 | Highlight toggle | ^B ^E ^F ^O ^V ^_ |
| 5 | Unsafe char | ^M (\r) |
| 6 | Control char | ^@ ^A ^D ^H ^K ^L ^N ^P ^Q ^R ^T ^U ^W ^X ^Y ^Z ^\ ^] ^^ |
| 7 | Beep | ^G |
| 8 | Tab | ^I |
| 9 | Non-destructive Space | ^S |
There are the 12 following mangle types:
| MANGLE_ESCAPES | NORMALIZE | STRIP_COLOR | STRIP_REVERSE |
| STRIP_UNDERLINE | STRIP_BOLD | STRIP_BLINK | STRIP_ND_SPACE |
| STRIP_ALT_CHAR | STRIP_ALL_OFF | STRIP_UNPRINTABLE | STRIP_OTHER |
The mangle types transform the characters, according to this table:
| A | Character or sequence converted into an attribute |
| M | Character mangled (ie, ^A into ^VA^V) |
| S | Character stripped, sequence (if any) NOT stripped |
| X | Character stripped, sequence (if any) also stripped |
| T | Transformed into other (safe) chars |
| - | No transformation |
| Mangle type | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|
| (default) | - | - | - | - | A | - | - | T | T | T |
| NORMALIZE | - | - | A | A | - | X | M | - | - | - |
| MANGLE_ESCAPES | - | - | S | - | - | - | - | - | - | - |
| STRIP_COLOR | - | - | - | X | - | - | - | - | - | - |
| STRIP_* | - | - | - | - | X | - | - | - | - | - |
| STRIP_UNPRINTABLE | - | X | S | S | X | X | X | X | - | - |
| STRIP_OTHER | X | - | - | - | - | - | - | - | X | X |
| (/SET ALLOW_C1) | - | X | - | - | - | - | - | - | - | - |
There are only *three* ambiguous cases: