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-rw-r--r--tests/seqgen.c260
1 files changed, 0 insertions, 260 deletions
diff --git a/tests/seqgen.c b/tests/seqgen.c
deleted file mode 100644
index 06e3ed5ba0b0..000000000000
--- a/tests/seqgen.c
+++ /dev/null
@@ -1,260 +0,0 @@
-/*
- * Copyright (c) 2017-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under both the BSD-style license (found in the
- * LICENSE file in the root directory of this source tree) and the GPLv2 (found
- * in the COPYING file in the root directory of this source tree).
- * You may select, at your option, one of the above-listed licenses.
- */
-
-#include "seqgen.h"
-#include "mem.h"
-#include <string.h>
-
-#define MIN(a, b) ((a) < (b) ? (a) : (b))
-
-static const size_t kMatchBytes = 128;
-
-#define SEQ_rotl32(x,r) ((x << r) | (x >> (32 - r)))
-static BYTE SEQ_randByte(unsigned* src)
-{
- static const U32 prime1 = 2654435761U;
- static const U32 prime2 = 2246822519U;
- U32 rand32 = *src;
- rand32 *= prime1;
- rand32 ^= prime2;
- rand32 = SEQ_rotl32(rand32, 13);
- *src = rand32;
- return (BYTE)(rand32 >> 5);
-}
-
-SEQ_stream SEQ_initStream(unsigned seed)
-{
- SEQ_stream stream;
- stream.state = 0;
- XXH64_reset(&stream.xxh, 0);
- stream.seed = seed;
- return stream;
-}
-
-/* Generates a single guard byte, then match length + 1 of a different byte,
- * then another guard byte.
- */
-static size_t SEQ_gen_matchLength(SEQ_stream* stream, unsigned value,
- SEQ_outBuffer* out)
-{
- typedef enum {
- ml_first_byte = 0,
- ml_match_bytes,
- ml_last_byte,
- } ml_state;
- BYTE* const ostart = (BYTE*)out->dst;
- BYTE* const oend = ostart + out->size;
- BYTE* op = ostart + out->pos;
-
- switch ((ml_state)stream->state) {
- case ml_first_byte:
- /* Generate a single byte and pick a different byte for the match */
- if (op >= oend) {
- stream->bytesLeft = 1;
- break;
- }
- *op = SEQ_randByte(&stream->seed) & 0xFF;
- do {
- stream->saved = SEQ_randByte(&stream->seed) & 0xFF;
- } while (*op == stream->saved);
- ++op;
- /* State transition */
- stream->state = ml_match_bytes;
- stream->bytesLeft = value + 1;
- /* fall-through */
- case ml_match_bytes: {
- /* Copy matchLength + 1 bytes to the output buffer */
- size_t const setLength = MIN(stream->bytesLeft, (size_t)(oend - op));
- if (setLength > 0) {
- memset(op, stream->saved, setLength);
- op += setLength;
- stream->bytesLeft -= setLength;
- }
- if (stream->bytesLeft > 0)
- break;
- /* State transition */
- stream->state = ml_last_byte;
- }
- /* fall-through */
- case ml_last_byte:
- /* Generate a single byte and pick a different byte for the match */
- if (op >= oend) {
- stream->bytesLeft = 1;
- break;
- }
- do {
- *op = SEQ_randByte(&stream->seed) & 0xFF;
- } while (*op == stream->saved);
- ++op;
- /* State transition */
- /* fall-through */
- default:
- stream->state = 0;
- stream->bytesLeft = 0;
- break;
- }
- XXH64_update(&stream->xxh, ostart + out->pos, (op - ostart) - out->pos);
- out->pos = op - ostart;
- return stream->bytesLeft;
-}
-
-/* Saves the current seed then generates kMatchBytes random bytes >= 128.
- * Generates literal length - kMatchBytes random bytes < 128.
- * Generates another kMatchBytes using the saved seed to generate a match.
- * This way the match is easy to find for the compressors.
- */
-static size_t SEQ_gen_litLength(SEQ_stream* stream, unsigned value, SEQ_outBuffer* out)
-{
- typedef enum {
- ll_start = 0,
- ll_run_bytes,
- ll_literals,
- ll_run_match,
- } ll_state;
- BYTE* const ostart = (BYTE*)out->dst;
- BYTE* const oend = ostart + out->size;
- BYTE* op = ostart + out->pos;
-
- switch ((ll_state)stream->state) {
- case ll_start:
- stream->state = ll_run_bytes;
- stream->saved = stream->seed;
- stream->bytesLeft = MIN(kMatchBytes, value);
- /* fall-through */
- case ll_run_bytes:
- while (stream->bytesLeft > 0 && op < oend) {
- *op++ = SEQ_randByte(&stream->seed) | 0x80;
- --stream->bytesLeft;
- }
- if (stream->bytesLeft > 0)
- break;
- /* State transition */
- stream->state = ll_literals;
- stream->bytesLeft = value - MIN(kMatchBytes, value);
- /* fall-through */
- case ll_literals:
- while (stream->bytesLeft > 0 && op < oend) {
- *op++ = SEQ_randByte(&stream->seed) & 0x7F;
- --stream->bytesLeft;
- }
- if (stream->bytesLeft > 0)
- break;
- /* State transition */
- stream->state = ll_run_match;
- stream->bytesLeft = MIN(kMatchBytes, value);
- /* fall-through */
- case ll_run_match: {
- while (stream->bytesLeft > 0 && op < oend) {
- *op++ = SEQ_randByte(&stream->saved) | 0x80;
- --stream->bytesLeft;
- }
- if (stream->bytesLeft > 0)
- break;
- }
- /* fall-through */
- default:
- stream->state = 0;
- stream->bytesLeft = 0;
- break;
- }
- XXH64_update(&stream->xxh, ostart + out->pos, (op - ostart) - out->pos);
- out->pos = op - ostart;
- return stream->bytesLeft;
-}
-
-/* Saves the current seed then generates kMatchBytes random bytes >= 128.
- * Generates offset - kMatchBytes of zeros to get a large offset without
- * polluting the hash tables.
- * Generates another kMatchBytes using the saved seed to generate a with the
- * required offset.
- */
-static size_t SEQ_gen_offset(SEQ_stream* stream, unsigned value, SEQ_outBuffer* out)
-{
- typedef enum {
- of_start = 0,
- of_run_bytes,
- of_offset,
- of_run_match,
- } of_state;
- BYTE* const ostart = (BYTE*)out->dst;
- BYTE* const oend = ostart + out->size;
- BYTE* op = ostart + out->pos;
-
- switch ((of_state)stream->state) {
- case of_start:
- stream->state = of_run_bytes;
- stream->saved = stream->seed;
- stream->bytesLeft = MIN(value, kMatchBytes);
- /* fall-through */
- case of_run_bytes: {
- while (stream->bytesLeft > 0 && op < oend) {
- *op++ = SEQ_randByte(&stream->seed) | 0x80;
- --stream->bytesLeft;
- }
- if (stream->bytesLeft > 0)
- break;
- /* State transition */
- stream->state = of_offset;
- stream->bytesLeft = value - MIN(value, kMatchBytes);
- }
- /* fall-through */
- case of_offset: {
- /* Copy matchLength + 1 bytes to the output buffer */
- size_t const setLength = MIN(stream->bytesLeft, (size_t)(oend - op));
- if (setLength > 0) {
- memset(op, 0, setLength);
- op += setLength;
- stream->bytesLeft -= setLength;
- }
- if (stream->bytesLeft > 0)
- break;
- /* State transition */
- stream->state = of_run_match;
- stream->bytesLeft = MIN(value, kMatchBytes);
- }
- /* fall-through */
- case of_run_match: {
- while (stream->bytesLeft > 0 && op < oend) {
- *op++ = SEQ_randByte(&stream->saved) | 0x80;
- --stream->bytesLeft;
- }
- if (stream->bytesLeft > 0)
- break;
- }
- /* fall-through */
- default:
- stream->state = 0;
- stream->bytesLeft = 0;
- break;
- }
- XXH64_update(&stream->xxh, ostart + out->pos, (op - ostart) - out->pos);
- out->pos = op - ostart;
- return stream->bytesLeft;
-}
-
-/* Returns the number of bytes left to generate.
- * Must pass the same type/value until it returns 0.
- */
-size_t SEQ_gen(SEQ_stream* stream, SEQ_gen_type type, unsigned value, SEQ_outBuffer* out)
-{
- switch (type) {
- case SEQ_gen_ml: return SEQ_gen_matchLength(stream, value, out);
- case SEQ_gen_ll: return SEQ_gen_litLength(stream, value, out);
- case SEQ_gen_of: return SEQ_gen_offset(stream, value, out);
- case SEQ_gen_max: /* fall-through */
- default: return 0;
- }
-}
-
-/* Returns the xxhash of the data produced so far */
-XXH64_hash_t SEQ_digest(SEQ_stream const* stream)
-{
- return XXH64_digest(&stream->xxh);
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-16 08:52:34 +0000