Primitive data types notations used in format specifications
These are based on C Types.
Where applicable square brackets will denote an array of this type. A number between the square brackets means its a fixed-length array of this length, otherwise it’s variable.
For example, a string of 16 bytes might be represented by char[16].
| Type | Size (bytes) | Description |
|---|---|---|
| char | 1 | signed char |
| u_char | 1 | unsigned char |
| short | 2 | signed short |
| int | 4 | signed integer |
| u_int | 4 | unsigned integer |
| float | 4 | float |
| _Bool | 1 | boolean |
| char[n] | n | string |
| p_char[] | variable (max 257) | pascal string 1 |
| nt_char[n] | n | null-terminated string |
Notes
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Pascal strings are length-prefixed with a single byte, and thus the string length is limited to 256 bytes. ↩