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move utility functions upwards to keep the logical order

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Quinn
2025-08-07 09:40:46 +02:00
parent ff7598a7e3
commit 4b2404e903
2 changed files with 60 additions and 60 deletions
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106
src/dat/nbt.c
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@@ -7,6 +7,59 @@
#include "../util/compat/endian.h"
#include "../util/types.h"
int nbt_isprim(u8 tag) {
switch (tag) {
case NBT_I8:
case NBT_I16:
case NBT_I32:
case NBT_F32:
case NBT_I64:
case NBT_F64:
return 1;
default:
return 0;
}
}
int nbt_primsize(u8 tag) {
switch (tag) {
case NBT_I8: return 1;
case NBT_I16: return 2;
case NBT_I32: // fall through
case NBT_F32: return 4;
case NBT_I64: // fall through
case NBT_F64: return 8;
default: return -1;
}
}
size_t nbt_tagdatlen(const u8 *restrict buf) {
size_t mems = 0;
switch (*buf) {
case NBT_I8:
case NBT_I16:
case NBT_I32:
case NBT_F32:
case NBT_I64:
case NBT_F64:
mems = nbt_primsize(*buf);
return -(mems >= 0) & mems;
case NBT_ARR_I64: mems += sizeof(i64) - sizeof(i32); __attribute__((fallthrough));
case NBT_ARR_I32: mems += sizeof(i32) - sizeof(i8); __attribute__((fallthrough));
case NBT_ARR_I8: return +mems * (i32)be32toh(*(u32 *)(buf)) + 4;
case NBT_STR: return be16toh(*(u16 *)buf) + 2;
case NBT_LIST:
mems = nbt_primsize(*buf);
if (mems > 0) return mems * (i32)be32toh(*(u32 *)(buf + 1)) + 5;
return 0;
default: return 0;
}
}
const u8 *nbt_nexttag(const u8 *restrict buf, u16 naml) {
size_t len = nbt_tagdatlen(buf);
if (!len) return NULL; // TODO: compound tags should be handled here
@@ -95,56 +148,3 @@ int nbt_proc(struct nbt_path const *restrict pats, uint npats, const u8 *restric
// TODO: finish function
return !dpt;
}
int nbt_primsize(u8 tag) {
switch (tag) {
case NBT_I8: return 1;
case NBT_I16: return 2;
case NBT_I32: // fall through
case NBT_F32: return 4;
case NBT_I64: // fall through
case NBT_F64: return 8;
default: return -1;
}
}
size_t nbt_tagdatlen(const u8 *restrict buf) {
size_t mems = 0;
switch (*buf) {
case NBT_I8:
case NBT_I16:
case NBT_I32:
case NBT_F32:
case NBT_I64:
case NBT_F64:
mems = nbt_primsize(*buf);
return -(mems >= 0) & mems;
case NBT_ARR_I64: mems += sizeof(i64) - sizeof(i32); __attribute__((fallthrough));
case NBT_ARR_I32: mems += sizeof(i32) - sizeof(i8); __attribute__((fallthrough));
case NBT_ARR_I8: return +mems * (i32)be32toh(*(u32 *)(buf)) + 4;
case NBT_STR: return be16toh(*(u16 *)buf) + 2;
case NBT_LIST:
mems = nbt_primsize(*buf);
if (mems > 0) return mems * (i32)be32toh(*(u32 *)(buf + 1)) + 5;
return 0;
default: return 0;
}
}
int nbt_isprim(u8 tag) {
switch (tag) {
case NBT_I8:
case NBT_I16:
case NBT_I32:
case NBT_F32:
case NBT_I64:
case NBT_F64:
return 1;
default:
return 0;
}
}