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C2H
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A C2H file (having the extension .c2h) is the file format where Chip's Challenge 2 stores the best scores and times for each level.
The file is a binary file consisting of several sections one after the other, terminated by the END section. Each section begins with a section header, which is followed by the section's data. Each level in the set that the player has encountered has its own copy of the FILE, TYPE, NAME and SAVE sections.
All data in the file is little-endian.
Format[edit]
Section header[edit]
| Bytes | Content |
|---|---|
| 4 | Four character code identifying the section, see table below. Codes shorter than 4 characters (such as "END") are padded with spaces (making "END " in this case). |
| 4 | The length of the section's data |
Section types[edit]
| Section ID | Content Type | Content |
|---|---|---|
| CC2H | Null-terminated string | The file's version. The latest version is "7". |
| FILE | Null-terminated string | The level's file name |
| TYPE | Null-terminated string | Usually the name of the levelset. For the base game, it's "Chips Challenge 2". In some cases it contains an empty string. |
| NAME | Null-terminated string | The level's title |
| SAVE | 100 bytes | Miscellaneous data |
| END | No content (length is 0) | Signifies end of file |
SAVE section[edit]
| Offset | Bytes | Content |
|---|---|---|
| 0x00 | 4 | Line number into c2g file where music and level file name can be found |
| 0x04 | 4 | Some kind of total score, in most cases slightly lower than the actual total score |
| 0x08 | 4 | Highest bonus score achieved (does not include bonus from time left) |
| 0x0C | 4 | Sixtieths of a second left[1] for the worst attempt recorded |
| 0x10 | 4 | Chips left |
| 0x14 | 4 | Time bonus |
| 0x18 | 4 | Level number |
| 0x1C | 4 | Initial time, in seconds |
| 0x20 | 4 | Number of level attempts before completion |
| 0x24 | 4 | Exit gender |
| 0x28 | 4 | Entry point that was used (advanced scripting) |
| 0x2C | 4 | Exit that was used (advanced scripting) |
| 0x30 | 4 | 1 if level is solved, 0 if unsolved |
| 0x34 | 4 | Result (advanced scripting) |
| 0x38 | 4 | Register 1 (advanced scripting) |
| 0x3C | 4 | Register 2 (advanced scripting) |
| 0x40 | 4 | Register 3 (advanced scripting) |
| 0x44 | 4 | Register 4 (advanced scripting) |
| 0x48 | 4 | Menu processing |
| 0x4C | 4 | Internal flags |
| 0x50 | 4 | Tools carried on exit |
| 0x54 | 4 | Keys carried on exit |
| 0x58 | 4 | Highest level time achieved |
| 0x5C | 4 | Highest level score achieved (including base level score) |
| 0x60 | 4 | Level checksum |
External Links[edit]
- Skype message from Chuck Sommerville about .c2h file format
- Notes on the .c2h file format by Ruben Spaans
Footnotes[edit]
- ↑ Conversion to decimal time is given by diving this by 60, rounding up, readding the fraction (replacing .00 with .100). For example, 3195 would become 54.25