Merge branch 'main' of git.sr.ht:~jacqueline/tangara-fw

10 files changed, 23 insertions, 598 deletions

diff --git a/lib/catch2/CMakeLists.txt b/lib/catch2/CMakeLists.txt
index ac435074..1811c2d6 100644
--- a/lib/catch2/CMakeLists.txt
+++ b/lib/catch2/CMakeLists.txt
@@ -1,3 +1,7 @@
+# Copyright 2023 jacqueline <me@jacqueline.id.au>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
 idf_component_register(
   SRCS "catch_runner.cpp"
   INCLUDE_DIRS "include"
diff --git a/lib/catch2/catch_runner.cpp b/lib/catch2/catch_runner.cpp
index 2b8f9678..ba4fa57e 100644
--- a/lib/catch2/catch_runner.cpp
+++ b/lib/catch2/catch_runner.cpp
@@ -1,3 +1,9 @@
+/*
+ * Copyright 2023 jacqueline <me@jacqueline.id.au>
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
 #include "catch_runner.hpp"
 
 #define CATCH_CONFIG_RUNNER
diff --git a/lib/komihash/CMakeLists.txt b/lib/komihash/CMakeLists.txt
index 55c96885..078d2369 100644
--- a/lib/komihash/CMakeLists.txt
+++ b/lib/komihash/CMakeLists.txt
@@ -1,3 +1,7 @@
+# Copyright 2023 jacqueline <me@jacqueline.id.au>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
 idf_component_register(
-  INCLUDE_DIRS .
+  INCLUDE_DIRS "include"
 )
diff --git a/lib/komihash/LICENSE b/lib/komihash/LICENSE
deleted file mode 100644
index 0abdeccc..00000000
--- a/lib/komihash/LICENSE
+++ /dev/null
@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2021-2022 Aleksey Vaneev
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/lib/komihash/README.md b/lib/komihash/README.md
deleted file mode 100644
index ba7a2cd5..00000000
--- a/lib/komihash/README.md
+++ /dev/null
@@ -1,477 +0,0 @@
-# KOMIHASH - Very Fast Hash Function (in C) #
-
-## Introduction ##
-
-The `komihash()` function available in the `komihash.h` file implements a very
-fast 64-bit hash function, mainly designed for hash-table and hash-map uses;
-produces identical hashes on both big- and little-endian systems. Function's
-code is portable, scalar, header-only inlineable C (C++).
-
-This function features both a high large-block hashing performance (26 GB/s
-on Ryzen 3700X) and a high hashing throughput for small strings/messages
-(about 10 cycles/hash for 0-15-byte strings). Performance on 32-bit systems
-is, however, quite low. Also, large-block hashing performance on big-endian
-systems may be 20% lower due to the need of byte-swapping (can be switched off
-with a define).
-
-Technically, `komihash` is close to the class of hash functions like `wyhash`
-and `CircleHash`, which are, in turn, close to the `lehmer64` PRNG. However,
-`komihash` is structurally different to them in that it accumulates the full
-128-bit multiplication result, without "compression" into a single 64-bit
-state variable. Thus `komihash` does not lose differentiation between
-consecutive states while others may. Another important difference in
-`komihash` is that it parses the input message without overlaps. While
-overlaps allow a function to have fewer code branches, they are considered
-"non-ideal", potentially causing collisions and seed value flaws. Beside that,
-`komihash` features superior seed value handling and Perlin Noise hashing.
-
-Note that this function is not cryptographically-secure: in open systems it
-should only be used with a secret seed, to minimize the chance of a collision
-attack. However, when the default seed is used (0), this further reduces
-function's overhead by 1-2 cycles/hash (compiler-dependent).
-
-This function passes all [SMHasher](https://github.com/rurban/smhasher) tests.
-
-An aspect worth noting, important to some users, is that `komihash` at its
-base uses a very simple mathematical construct, and uses no author-intended
-nor author-fabricated information. The base state of the function is equal to
-the first mantissa bits of PI, and can be changed to any uniformly-random
-values.
-
-## Discrete-Incremental Hashing ##
-
-A correct way to hash an array of independent values, and which does not
-require pre-buffering, is to pass previous hash value as a seed value. This
-method may be as fast or faster than pre-buffering, especially if lengths of
-values in the array are not small. An additional 1-2 cycles/hash advantage is
-obtained if fixed-size values are being hashed incrementally (due to
-compiler's branching optimization). In most cases, incremental hashing of even
-a few 2-8-byte values may be faster than using pre-buffering if the overall
-input length is not known in advance.
-
-```
-	uint64_t HashVal = komihash( &val1, sizeof( val1 ), Seed );
-	HashVal = komihash( &val2, sizeof( val2 ), HashVal );
-	...
-	HashVal = komihash( &valN, sizeof( valN ), HashVal );
-```
-
-Note that this approach is not the same as "streamed" hashing since this
-approach implicitly encodes the length of each independent value. Such kind of
-hashing can be beneficial when a database record is being hashed, when it is
-necessary to separate fields by means of encoding their lengths.
-
-Discrete-incremental hashing of nested structures requires a "hash value
-stack" where the current hash value is pushed into it upon each nesting, the
-nested level starts at hash value 0, and the resulting value is hashed with a
-popped previous hash value upon exiting the nesting level.
-
-## Streamed Hashing ##
-
-The `komihash.h` file also features a fast continuously streamed
-implementation of the `komihash` hash function. Streamed hashing expects any
-number of `update` calls inbetween the `init` and `final` calls:
-
-```
-	komihash_stream_t ctx;
-	komihash_stream_init( &ctx, UseSeed );
-
-	komihash_stream_update( &ctx, &val1, sizeof( val1 ));
-	komihash_stream_update( &ctx, &val2, sizeof( val2 ));
-	...
-	komihash_stream_update( &ctx, &valN, sizeof( valN ));
-
-	uint64_t Hash = komihash_stream_final( &ctx );
-```
-
-Since the `final` function is non-destructive for the context structure, the
-function can be used to obtain intermediate "incremental" hashes of the data
-stream being hashed, and the hashing can then be resumed.
-
-The hash value produced via streamed hashing can be used in the
-discrete-incremental hashing outlined above (e.g., for files and blobs).
-
-You may also consider using [PRVHASH64S](https://github.com/avaneev/prvhash)
-which provides 8.4 GB/s hashing throughput on Ryzen 3700X, and is able to
-produce a hash value of any required bit-size.
-
-## Ports ##
-
-* [Java, by Dynatrace](https://github.com/dynatrace-oss/hash4j)
-* [LUA, by rangercyh](https://github.com/rangercyh/lua-komihash)
-* [.NET](https://www.nuget.org/packages/FastHashes/)
-* [Rust](https://crates.io/crates/komihash)
-
-## Comparisons ##
-
-These are the performance comparisons made and used by the author during the
-development of `komihash`.
-
-### LLVM clang-cl 8.0.1 64-bit, Windows 10, Ryzen 3700X (Zen2), 4.2 GHz ###
-
-Compiler options: `/Ox /arch:sse2`; overhead: `1.8` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|11.0           |12.7           |26.2           |
-|komihash 4.3    |11.2           |13.0           |26.0           |
-|komihash 3.6    |11.1           |16.9           |27.5           |
-|komihash 2.8    |11.3           |17.4           |27.7           |
-|wyhash_final3   |13.4           |17.8           |29.7           |
-|XXH3_64 0.8.0   |17.5           |21.1           |29.0           |
-|XXH64 0.8.0     |12.7           |17.3           |17.3           |
-|prvhash64m 4.1  |19.9           |26.1           |4.1            |
-
-Compiler options: `/Ox -mavx2`; overhead: `1.8` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|11.1           |12.7           |26.3           |
-|komihash 4.3    |11.2           |13.0           |25.9           |
-|komihash 3.6    |11.0           |16.3           |27.5           |
-|komihash 2.8    |11.1           |17.7           |27.8           |
-|wyhash_final3   |13.4           |17.7           |29.8           |
-|XXH3_64 0.8.0   |17.7           |21.3           |61.0           |
-|XXH64 0.8.0     |12.8           |17.4           |17.1           |
-|prvhash64m 4.1  |20.0           |26.2           |4.1            |
-
-### ICC 19.0 64-bit, Windows 10, Ryzen 3700X (Zen2), 4.2 GHz ###
-
-Compiler options: `/O3 /QxSSE2`; overhead: `2.0` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|18.1           |21.9           |16.4           |
-|komihash 4.3    |17.9           |21.6           |16.3           |
-|komihash 3.6    |20.1           |24.0           |16.3           |
-|komihash 2.8    |21.3           |25.6           |16.2           |
-|wyhash_final3   |24.1           |32.0           |12.6           |
-|XXH3_64 0.8.0   |21.8           |27.2           |29.6           |
-|XXH64 0.8.0     |24.3           |36.6           |8.9            |
-|prvhash64m 4.1  |29.9           |39.1           |3.2            |
-
-(this is likely a worst-case scenario, when a compiler was not cross-tuned
-to a competing processor architecture; also, ICC for Windows does not support
-the `__builtin_expect` and `__builtin_prefetch` intrinsics)
-
-### LLVM clang 12.0.1 64-bit, CentOS 8, Xeon E-2176G (CoffeeLake), 4.5 GHz ###
-
-Compiler options: `-O3 -mavx2`; overhead: `5.3` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|12.8           |14.4           |22.4           |
-|komihash 4.3    |15.3           |16.3           |22.8           |
-|komihash 3.6    |16.0           |19.0           |22.3           |
-|komihash 2.8    |18.1           |22.3           |23.5           |
-|wyhash_final3   |14.0           |18.7           |28.4           |
-|XXH3_64 0.8.0   |18.0           |29.3           |51.0           |
-|XXH64 0.8.0     |12.5           |16.4           |18.2           |
-|prvhash64m 4.1  |27.0           |29.9           |4.3            |
-
-### GCC 8.5.0 64-bit, CentOS 8, Xeon E-2176G (CoffeeLake), 4.5 GHz ###
-
-Compiler options: `-O3 -msse2`; overhead: `5.8` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|13.2           |15.1           |24.7           |
-|komihash 4.3    |15.4           |16.2           |24.4           |
-|komihash 3.6    |16.4           |20.3           |24.7           |
-|komihash 2.8    |18.5           |22.4           |24.7           |
-|wyhash_final3   |14.9           |19.5           |29.8           |
-|XXH3_64 0.8.0   |16.9           |22.3           |26.6           |
-|XXH64 0.8.0     |13.7           |17.7           |18.0           |
-|prvhash64m 4.1  |23.2           |27.8           |4.3            |
-
-Compiler options: `-O3 -mavx2`; overhead: `5.8` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|13.8           |15.2           |24.7           |
-|komihash 4.3    |15.3           |16.4           |24.4           |
-|komihash 3.6    |15.8           |20.1           |24.7           |
-|komihash 2.8    |16.6           |21.2           |24.7           |
-|wyhash_final3   |15.4           |19.0           |30.1           |
-|XXH3_64 0.8.0   |18.8           |23.4           |38.0           |
-|XXH64 0.8.0     |15.3           |17.9           |18.1           |
-|prvhash64m 4.1  |21.7           |27.1           |4.4            |
-
-### LLVM clang 8.0.0 64-bit, Windows 10, Core i7-7700K (KabyLake), 4.5 GHz ###
-
-Compiler options: `/Ox -mavx2`; overhead: `5.5` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|12.6           |14.5           |22.2           |
-|komihash 4.3    |14.1           |16.0           |22.0           |
-|komihash 3.6    |14.0           |22.0           |22.9           |
-|komihash 2.8    |13.4           |22.7           |23.7           |
-|wyhash_final3   |14.5           |20.1           |30.0           |
-|XXH3_64 0.8.0   |18.4           |23.0           |48.3           |
-|XXH64 0.8.0     |13.2           |17.3           |17.7           |
-|prvhash64m 4.1  |23.2           |29.6           |4.1            |
-
-### ICC 19.0 64-bit, Windows 10, Core i7-7700K (KabyLake), 4.5 GHz ###
-
-Compiler options: `/O3 /QxSSE2`; overhead: `5.9` cycles/h.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|18.1           |21.1           |17.2           |
-|komihash 4.3    |18.7           |21.5           |18.5           |
-|komihash 3.6    |19.5           |23.1           |18.1           |
-|komihash 2.8    |20.1           |23.6           |18.4           |
-|wyhash_final3   |19.2           |24.5           |20.0           |
-|XXH3_64 0.8.0   |19.9           |25.8           |28.0           |
-|XXH64 0.8.0     |18.8           |24.7           |16.0           |
-|prvhash64m 4.1  |25.5           |32.4           |3.2            |
-
-### Apple clang 12.0.0 64-bit, macOS 12.0.1, Apple M1, 3.5 GHz ###
-
-Compiler options: `-O3`; overhead: `unestimatable`.
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|bulk, GB/s     |
-|----            |----           |----           |----           |
-|**komihash 4.5**|8.3            |8.7            |23.6           |
-|komihash 4.3    |8.6            |9.0            |23.6           |
-|komihash 3.6    |8.5            |10.7           |23.6           |
-|komihash 2.8    |10.1           |11.4           |23.5           |
-|wyhash_final3   |7.9            |8.0            |26.1           |
-|XXH3_64 0.8.0   |8.2            |8.2            |30.5           |
-|XXH64 0.8.0     |8.8            |10.4           |14.5           |
-|prvhash64m 4.1  |12.9           |16.8           |3.5            |
-
-Notes: `XXH3_64` is unseeded (seeded variant is 1 cycle/h higher). `bulk` is
-256000 bytes: this means it is mainly a cache-bound performance, not
-reflective of high-load situations. `GB/s` should not be misinterpreted as
-`GiB/s`. `cycles/h` means `processor clock ticks per hash value`, including
-overhead. Measurement error is approximately 3%.
-
-### Averages over all measurements (overhead excluded) ###
-
-|Hash function   |0-15b, cycles/h|8-28b, cycles/h|
-|----            |----           |----           |
-|**komihash 4.5**|**9.5**        |**11.4**       |
-|komihash 4.3    |10.4           |12.1           |
-|komihash 3.6    |10.9           |15.4           |
-|komihash 2.8    |11.8           |16.7           |
-|wyhash_final3   |11.4           |15.9           |
-|XXH3_64 0.8.0   |13.7           |18.6           |
-|XXH64 0.8.0     |10.9           |15.8           |
-|prvhash64m 4.1  |18.8           |24.6           |
-
-This is the throughput comparison of hash functions on Ryzen 3700X. The used
-measurement method actually measures hash function's "latencied throughput",
-or sequential hashing, due to the use of the "volatile" variable specifiers
-and result accumulation.
-
-![TP plot](https://github.com/avaneev/komihash/blob/main/hash_comparison.png)
-
-The following method was used to obtain the `cycles/h` values. Note that this
-method measures a "raw" throughput, when processor's branch predictor tunes to
-a specific message length and a specific memory address. Practical performance
-depends on actual statistics of strings (messages) being hashed, including
-memory access patterns. Note that particular hash functions may "over-favor"
-specific message lengths. In this respect, `komihash` does not "favor" any
-specific length, thus it may be more universal. Throughput aside, hashing
-quality is also an important factor as it drives a hash-map's creation and
-subsequent accesses. This, and many other synthetic hash function tests should
-be taken with a grain of salt. Only an actual use-case can reveal which hash
-function is preferrable.
-
-```
-	const uint64_t rc = 1ULL << 26;
-	const int minl = 8; const int maxl = 28;
-	volatile uint64_t msg[ 8 ] = { 0 };
-	uint64_t v = 0;
-
-	const TClock t1( CSystem :: getClock() );
-
-	for( int k = minl; k <= maxl; k++ )
-	{
-		volatile size_t msgl = k;
-		volatile uint64_t sd = k + 1;
-
-		for( uint64_t i = 0; i < rc; i++ )
-		{
-			v ^= komihash( (uint8_t*) &msg, msgl, sd );
-//			v ^= wyhash( (uint8_t*) &msg, msgl, sd, _wyp );
-//			v ^= XXH3_64bits( (uint8_t*) &msg, msgl );
-//			v ^= msg[ 0 ]; // Used to estimate the overhead.
-			msg[ 0 ]++;
-		}
-	}
-
-	printf( "%016llx\n", v );
-	printf( "%.1f\n", CSystem :: getClockDiffSec( t1 ) * 4.2e9 /
-		( rc * ( maxl - minl + 1 ))); // 4.5 on Xeon, 4.5 on i7700K, 3.5 on M1
-```
-
-## Discussion ##
-
-You may wonder, why `komihash` does not include a quite common `^MsgLen` XOR
-instruction at some place in the code? The main reason is that due to the way
-`komihash` parses the input message such instruction is not necessary. Another
-reason is that for a non-cryptographic hash function such instruction provides
-no additional security: while it may seem that such instruction protects from
-simple "state XORing" collision attacks, in practice it offers no protection,
-if one considers how powerful [SAT solvers](https://github.com/pysathq/pysat)
-are: in less than a second they can "forge" a preimage which produces a
-required hash value. It is also important to note that in such "fast" hash
-functions like `komihash` the input message has complete control over the
-state variables.
-
-Is 128-bit version of this hash function planned? Most probably, no, it is
-not. While such version may be reasonable for data structure compatibility
-reasons, there is no much practical sense to use 128-bit hashes at a local
-level: a reliable 64-bit hash allows one to have 2.1 billion diverse binary
-objects (e.g. files in a file system, or entries in a hash-map) without
-collisions, on average. On the other hand, on a worldwide scale, having
-128-bit hashes is clearly not enough considering the number of existing
-digital devices and the number of diverse binary objects (e.g. files, records
-in databases) on each of them.
-
-An opinion on the "bulk" performance of "fast" hash functions: in most
-practical situations, when processor's total memory bandwidth is limited to
-e.g. 41 GB/s, a "bulk" single-threaded hashing performance on the order of
-30 GB/s is excessive considering memory bandwidth has to be spread over
-multiple cores. So, practically, such "fast" hash function, working on a
-high-load 8-core server, rarely receives more than 8 GB/s of bandwidth.
-Another factor worth mentioning is that a server rarely has more than 10 Gb/s
-network connectivity, thus further reducing practical hashing performance of
-incoming data. The same applies to disk system's throughput, if on-disk data
-is not yet in memory.
-
-## KOMIRAND ##
-
-The `komirand()` function available in the `komihash.h` file implements a
-simple, but reliable, self-starting, and fast (`0.62` cycles/byte) 64-bit
-pseudo-random number generator (PRNG) with `2^64` period. It is based on the
-same mathematical construct as the `komihash` hash function. `komirand`
-passes `PractRand` tests.
-
-## Other ##
-
-This function is named the way it is named is to honor
-the [Komi Republic](https://en.wikipedia.org/wiki/Komi_Republic) (located in
-Russia), native to the author.
-
-## Test Vectors ##
-
-Test vectors for the current version of `komihash`, string-hash pairs (note
-that the parentheses are not included in the calculation). The `bulk` is a
-buffer with increasing 8-bit values; `bulk` hashes are calculated from this
-buffer using various lengths. See the `testvec.c` file for details.
-
-```
-	komihash UseSeed = 0x0000000000000000:
-	"This is a 32-byte tester string." = 0x8e92e061278366d2
-	"The cat is out of the bag" = 0xd15723521d3c37b1
-	"A 16-byte string" = 0x467caa28ea3da7a6
-	"The new string" = 0xf18e67bc90c43233
-	"7 bytes" = 0xe72e558f5eaf2554
-	bulk(6) = 0xa56469564c2ea0ff
-	bulk(12) = 0x64c2ad96013f70fe
-	bulk(20) = 0x7a3888bc95545364
-	bulk(31) = 0xc77e02ed4b201b9a
-	bulk(32) = 0x256d74350303a1ba
-	bulk(40) = 0x59609c71697bb9df
-	bulk(47) = 0x36eb9e6a4c2c5e4b
-	bulk(48) = 0x8dd56c332850baa6
-	bulk(56) = 0xcbb722192b353999
-	bulk(64) = 0x5cf87bcba93e6a5b
-	bulk(72) = 0x6c79a1d9474f003f
-	bulk(80) = 0x88684fa67b351c33
-	bulk(112) = 0xdc481a2af36a87dd
-	bulk(132) = 0xe172275e13a1c938
-	bulk(256) = 0xa9d9cde10342d965
-
-	komihash UseSeed = 0x0123456789abcdef:
-	"This is a 32-byte tester string." = 0x6455c9cfdd577ebd
-	"The cat is out of the bag" = 0x5b1da0b43545d196
-	"A 16-byte string" = 0x26af914213d0c915
-	"The new string" = 0x62d9ca1b73250cb5
-	"7 bytes" = 0x2bf17dbb71d92897
-	bulk(6) = 0xaceebc32a3c0d9e4
-	bulk(12) = 0xec8eb3ef4af380b4
-	bulk(20) = 0x07045bd31abba34c
-	bulk(31) = 0xd5f619fb2e62c4ae
-	bulk(32) = 0x5a336fd2c4c39abe
-	bulk(40) = 0x0e870b4623eea8ec
-	bulk(47) = 0xe552edd6bf419d1d
-	bulk(48) = 0x37d170ddcb1223e6
-	bulk(56) = 0x1cd89e708e5098b6
-	bulk(64) = 0x4da1005904c8d804
-	bulk(72) = 0xc8b03f196b2551ee
-	bulk(80) = 0x2d4d58743755344d
-	bulk(112) = 0x0e77e5c92f929bdd
-	bulk(132) = 0x0b3b216a1fc3234e
-	bulk(256) = 0xeb726377f8d072e8
-
-	komihash UseSeed = 0x0000000000000100:
-	"This is a 32-byte tester string." = 0x60ed46218532462a
-	"The cat is out of the bag" = 0xa761280322bb7698
-	"A 16-byte string" = 0x11c31ccabaa524f1
-	"The new string" = 0x3a43b7f58281c229
-	"7 bytes" = 0x3c8a980831b70dc8
-	bulk(6) = 0xea606e43d1976ccf
-	bulk(12) = 0xacbec1886cd23275
-	bulk(20) = 0x57c3affd1b71fcdb
-	bulk(31) = 0x7ef6ba49a3b068c3
-	bulk(32) = 0x49dbca62ed5a1ddf
-	bulk(40) = 0x192848484481e8c0
-	bulk(47) = 0x420b43a5edba1bd7
-	bulk(48) = 0xd6e8400a9de24ce3
-	bulk(56) = 0xbea291b225ff384d
-	bulk(64) = 0xf237bc1d85f12b52
-	bulk(72) = 0x577a4d993f26cd52
-	bulk(80) = 0xace499103def982d
-	bulk(112) = 0x200c46677408d850
-	bulk(132) = 0x6b003f62eba47761
-	bulk(256) = 0xa8a3bd0ecf908b92
-```
-
-```
-	komirand Seed1/Seed2 = 0x0000000000000000:
-	0xaaaaaaaaaaaaaaaa
-	0xfffffffffffffffe
-	0x4924924924924910
-	0xbaebaebaebaeba00
-	0x400c62cc4727496b
-	0x35a969173e8f925b
-	0xdb47f6bae9a247ad
-	0x98e0f6cece6711fe
-	0x97ffa2397fda534b
-	0x11834262360df918
-	0x34e53df5399f2252
-	0xecaeb74a81d648ed
-
-	komirand Seed1/Seed2 = 0x0123456789abcdef:
-	0x776ad9718078ca64
-	0x737aa5d5221633d0
-	0x685046cca30f6f44
-	0xfb725cb01b30c1ba
-	0xc501cc999ede619f
-	0x8427298e525db507
-	0xd9baf3c54781f75e
-	0x7f5a4e5b97b37c7b
-	0xde8a0afe8e03b8c1
-	0xb6ed3e72b69fc3d6
-	0xa68727902f7628d0
-	0x44162b63af484587
-
-	komirand Seed1/Seed2 = 0x0000000000000100:
-	0xaaaaaaaaaaababaa
-	0xfffffffff8fcf8fe
-	0xdb6dba1e4dbb1134
-	0xf5b7d3aec37f4cb1
-	0x66a571da7ded7051
-	0x2d59ec9245bf03d9
-	0x5c06a41bd510aed8
-	0xea5e7ea9d2bd07a2
-	0xe395015ddce7756f
-	0xc07981aaeaae3b38
-	0x2e120ebfee59a5a2
-	0x9001eee495244dba
-```
diff --git a/lib/komihash/hash_comparison.png b/lib/komihash/hash_comparison.png
deleted file mode 100644
index 57782776..00000000
--- a/lib/komihash/hash_comparison.png
+++ /dev/null
diff --git a/lib/komihash/komihash.h b/lib/komihash/include/komihash.h
index 7a72fda8..7a72fda8 100644
--- a/lib/komihash/komihash.h
+++ b/lib/komihash/include/komihash.h
diff --git a/lib/komihash/testvec.c b/lib/komihash/testvec.c
deleted file mode 100644
index 3a405381..00000000
--- a/lib/komihash/testvec.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/**
- * testvec.c version 4.3.1
- *
- * The program that lists test vectors and their hash values, for the current
- * version of komihash. Also prints initial outputs of `komirand` PRNG.
- *
- * Description is available at https://github.com/avaneev/komihash
- *
- * License
- *
- * Copyright (c) 2021-2022 Aleksey Vaneev
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- */
-
-#include <stdio.h>
-#include "komihash.h"
-
-int main()
-{
-	const int seedc = 3;
-	const uint64_t seeds[ seedc ] = { 0, 0x0123456789ABCDEF, 256 };
-
-	const int strc = 5;
-	const char* const strs[ strc ] = {
-		"This is a 32-byte tester string.",
-		"The cat is out of the bag",
-		"A 16-byte string",
-		"The new string",
-		"7 bytes"
-	};
-
-	const int bulkc = 15;
-	const int bulks[ bulkc ] = { 6, 12, 20, 31, 32, 40, 47, 48, 56, 64,
-		72, 80, 112, 132, 256 };
-
-	uint8_t bulkbuf[ 256 ];
-	int i;
-
-	for( i = 0; i < 256; i++ )
-	{
-		bulkbuf[ i ] = (uint8_t) i;
-	}
-
-	int j;
-
-	for( j = 0; j < seedc; j++ )
-	{
-		printf( "\tkomihash UseSeed = 0x%016llx:\n", seeds[ j ]);
-
-		for( i = 0; i < strc; i++ )
-		{
-			const char* const s = strs[ i ];
-			const size_t sl = strlen( s );
-
-			printf( "\t\"%s\" = 0x%016llx\n", s,
-				komihash( s, sl, seeds[ j ]));
-		}
-
-		for( i = 0; i < bulkc; i++ )
-		{
-			printf( "\tbulk(%i) = 0x%016llx\n", bulks[ i ],
-				komihash( bulkbuf, bulks[ i ], seeds[ j ]));
-		}
-
-		printf( "\n" );
-	}
-
-	for( j = 0; j < seedc; j++ )
-	{
-		printf( "\tkomirand Seed1/Seed2 = 0x%016llx:\n", seeds[ j ]);
-
-		uint64_t Seed1 = seeds[ j ];
-		uint64_t Seed2 = seeds[ j ];
-
-		for( i = 0; i < 12; i++ )
-		{
-			printf( "\t0x%016llx\n", komirand( &Seed1, &Seed2 ));
-		}
-
-		printf( "\n" );
-	}
-}
diff --git a/lib/result/CMakeLists.txt b/lib/result/CMakeLists.txt
index 67111692..57871f57 100644
--- a/lib/result/CMakeLists.txt
+++ b/lib/result/CMakeLists.txt
@@ -1 +1,5 @@
+# Copyright 2023 jacqueline <me@jacqueline.id.au>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
 idf_component_register(INCLUDE_DIRS "include")
diff --git a/lib/span/CMakeLists.txt b/lib/span/CMakeLists.txt
index 67111692..57871f57 100644
--- a/lib/span/CMakeLists.txt
+++ b/lib/span/CMakeLists.txt
@@ -1 +1,5 @@
+# Copyright 2023 jacqueline <me@jacqueline.id.au>
+#
+# SPDX-License-Identifier: GPL-3.0-only
+
 idf_component_register(INCLUDE_DIRS "include")