thepigeongenerator/mcaselector-lite
1
0
Fork 0
mirror of https://github.com/thepigeongenerator/mcaselector-lite.git synced 2025-12-18 14:35:48 +01:00
Code Issues Packages Projects Releases Wiki Activity

use a flexible array member for including length with array data

Browse Source
This commit is contained in:
Quinn
2025-08-24 13:21:05 +02:00
parent a6442a851e
commit 6dae1d1600
2 changed files with 17 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/dat/nbt.h
View File

@@ -50,16 +50,23 @@ struct nbt_procdat {
i16 dpt, mdpt;
};
struct nbt_array {
i32 len;
u8 dat[];
};
/* searches for the end of a named tag without processing data, the final pointer is returned.
* `NULL` is returned upon failure, the otherwise returned pointer is not guaranteed to be valid. */
const u8 *nbt_nexttag(const u8 *restrict buf) NONNULL((1)) PURE;
/* Processes the tag entered in `buf`, `buf` is assumed to be the start of a named tag. Where `slen` shall be the string length.
* The data in `buf` is processed and outputted to `out`. A pointer to the next tag is returned.
* The data in `buf` is processed and outputted to `out`. A pointer to the next tag, or `NULL` is returned.
* On little-endian systems, the data is processed from big-endian to little-endian. So it can be used like normal.
* - In the case for all basic types, `out` will require to be the width of said type.
* - In the case of arrays, a pointer shall be returned pointing to the data. TODO: it'd be nice to know how large this array is.
* - In the case of `NBT_LIST`, if it is of the type `NBT_Ixx` and `NBT_Fxx`, then it's handled. Otherwise the funcion shall fail.
* Upon failure, `NULL` is returned. */
* - In the case of arrays (and lists), a malloc'd pointer shall be written to `out`, pointing to `struct nbt_array`. This might be `NULL`
* - In the case of lists, the above is valid, as long as the list contains any of the following types:
* `NBT_I8`, `NBT_I16`, `NBT_I32`, `NBT_I64`, `NBT_F32` or `NBT_F64`. Anything else will result in a `NULL` pointer.
* Upon failure, like the tag not being able to be processed, `NULL` is returned. */
const u8 *nbt_proctag(const u8 *restrict buf, u16 slen, void *restrict out) NONNULL((1, 3));
/* initialises a data structure used whilst processing the tags */