Merging upstream version 2.0.3+dfsg:

- does not include dygraphs anymore (Closes: #923993)
- does not include pako anymore (Closes: #1042533)
- does not include dashboard binaries anymore (Closes: #1045145)

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 707 deletions

diff --git a/src/streaming/compression.c b/src/streaming/compression.c
deleted file mode 100644
index a94c8a0a6..000000000
--- a/src/streaming/compression.c
+++ /dev/null
@@ -1,707 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#include "compression.h"
-
-#include "compression_gzip.h"
-
-#ifdef ENABLE_LZ4
-#include "compression_lz4.h"
-#endif
-
-#ifdef ENABLE_ZSTD
-#include "compression_zstd.h"
-#endif
-
-#ifdef ENABLE_BROTLI
-#include "compression_brotli.h"
-#endif
-
-int rrdpush_compression_levels[COMPRESSION_ALGORITHM_MAX] = {
-        [COMPRESSION_ALGORITHM_NONE]    = 0,
-        [COMPRESSION_ALGORITHM_ZSTD]    = 3,    // 1 (faster)  - 22 (smaller)
-        [COMPRESSION_ALGORITHM_LZ4]     = 1,    // 1 (smaller) -  9 (faster)
-        [COMPRESSION_ALGORITHM_BROTLI]  = 3,    // 0 (faster)  - 11 (smaller)
-        [COMPRESSION_ALGORITHM_GZIP]    = 1,    // 1 (faster)  -  9 (smaller)
-};
-
-void rrdpush_parse_compression_order(struct receiver_state *rpt, const char *order) {
-    // empty all slots
-    for(size_t i = 0; i < COMPRESSION_ALGORITHM_MAX ;i++)
-        rpt->config.compression_priorities[i] = STREAM_CAP_NONE;
-
-    char *s = strdupz(order);
-
-    char *words[COMPRESSION_ALGORITHM_MAX + 100] = { NULL };
-    size_t num_words = quoted_strings_splitter_pluginsd(s, words, COMPRESSION_ALGORITHM_MAX + 100);
-    size_t slot = 0;
-    STREAM_CAPABILITIES added = STREAM_CAP_NONE;
-    for(size_t i = 0; i < num_words && slot < COMPRESSION_ALGORITHM_MAX ;i++) {
-        if((STREAM_CAP_ZSTD_AVAILABLE) && strcasecmp(words[i], "zstd") == 0 && !(added & STREAM_CAP_ZSTD)) {
-            rpt->config.compression_priorities[slot++] = STREAM_CAP_ZSTD;
-            added |= STREAM_CAP_ZSTD;
-        }
-        else if((STREAM_CAP_LZ4_AVAILABLE) && strcasecmp(words[i], "lz4") == 0 && !(added & STREAM_CAP_LZ4)) {
-            rpt->config.compression_priorities[slot++] = STREAM_CAP_LZ4;
-            added |= STREAM_CAP_LZ4;
-        }
-        else if((STREAM_CAP_BROTLI_AVAILABLE) && strcasecmp(words[i], "brotli") == 0 && !(added & STREAM_CAP_BROTLI)) {
-            rpt->config.compression_priorities[slot++] = STREAM_CAP_BROTLI;
-            added |= STREAM_CAP_BROTLI;
-        }
-        else if(strcasecmp(words[i], "gzip") == 0 && !(added & STREAM_CAP_GZIP)) {
-            rpt->config.compression_priorities[slot++] = STREAM_CAP_GZIP;
-            added |= STREAM_CAP_GZIP;
-        }
-    }
-
-    freez(s);
-
-    // make sure all participate
-    if((STREAM_CAP_ZSTD_AVAILABLE) && slot < COMPRESSION_ALGORITHM_MAX && !(added & STREAM_CAP_ZSTD))
-        rpt->config.compression_priorities[slot++] = STREAM_CAP_ZSTD;
-    if((STREAM_CAP_LZ4_AVAILABLE) && slot < COMPRESSION_ALGORITHM_MAX && !(added & STREAM_CAP_LZ4))
-        rpt->config.compression_priorities[slot++] = STREAM_CAP_LZ4;
-    if((STREAM_CAP_BROTLI_AVAILABLE) && slot < COMPRESSION_ALGORITHM_MAX && !(added & STREAM_CAP_BROTLI))
-        rpt->config.compression_priorities[slot++] = STREAM_CAP_BROTLI;
-    if(slot < COMPRESSION_ALGORITHM_MAX && !(added & STREAM_CAP_GZIP))
-        rpt->config.compression_priorities[slot++] = STREAM_CAP_GZIP;
-}
-
-void rrdpush_select_receiver_compression_algorithm(struct receiver_state *rpt) {
-    if (!rpt->config.rrdpush_compression)
-        rpt->capabilities &= ~STREAM_CAP_COMPRESSIONS_AVAILABLE;
-
-    // select the right compression before sending our capabilities to the child
-    if(stream_has_more_than_one_capability_of(rpt->capabilities, STREAM_CAP_COMPRESSIONS_AVAILABLE)) {
-        STREAM_CAPABILITIES compressions = rpt->capabilities & STREAM_CAP_COMPRESSIONS_AVAILABLE;
-        for(int i = 0; i < COMPRESSION_ALGORITHM_MAX; i++) {
-            STREAM_CAPABILITIES c = rpt->config.compression_priorities[i];
-
-            if(!(c & STREAM_CAP_COMPRESSIONS_AVAILABLE))
-                continue;
-
-            if(compressions & c) {
-                STREAM_CAPABILITIES exclude = compressions;
-                exclude &= ~c;
-
-                rpt->capabilities &= ~exclude;
-                break;
-            }
-        }
-    }
-}
-
-bool rrdpush_compression_initialize(struct sender_state *s) {
-    rrdpush_compressor_destroy(&s->compressor);
-
-    // IMPORTANT
-    // KEEP THE SAME ORDER IN DECOMPRESSION
-
-    if(stream_has_capability(s, STREAM_CAP_ZSTD))
-        s->compressor.algorithm = COMPRESSION_ALGORITHM_ZSTD;
-    else if(stream_has_capability(s, STREAM_CAP_LZ4))
-        s->compressor.algorithm = COMPRESSION_ALGORITHM_LZ4;
-    else if(stream_has_capability(s, STREAM_CAP_BROTLI))
-        s->compressor.algorithm = COMPRESSION_ALGORITHM_BROTLI;
-    else if(stream_has_capability(s, STREAM_CAP_GZIP))
-        s->compressor.algorithm = COMPRESSION_ALGORITHM_GZIP;
-    else
-        s->compressor.algorithm = COMPRESSION_ALGORITHM_NONE;
-
-    if(s->compressor.algorithm != COMPRESSION_ALGORITHM_NONE) {
-        s->compressor.level = rrdpush_compression_levels[s->compressor.algorithm];
-        rrdpush_compressor_init(&s->compressor);
-        return true;
-    }
-
-    return false;
-}
-
-bool rrdpush_decompression_initialize(struct receiver_state *rpt) {
-    rrdpush_decompressor_destroy(&rpt->decompressor);
-
-    // IMPORTANT
-    // KEEP THE SAME ORDER IN COMPRESSION
-
-    if(stream_has_capability(rpt, STREAM_CAP_ZSTD))
-        rpt->decompressor.algorithm = COMPRESSION_ALGORITHM_ZSTD;
-    else if(stream_has_capability(rpt, STREAM_CAP_LZ4))
-        rpt->decompressor.algorithm = COMPRESSION_ALGORITHM_LZ4;
-    else if(stream_has_capability(rpt, STREAM_CAP_BROTLI))
-        rpt->decompressor.algorithm = COMPRESSION_ALGORITHM_BROTLI;
-    else if(stream_has_capability(rpt, STREAM_CAP_GZIP))
-        rpt->decompressor.algorithm = COMPRESSION_ALGORITHM_GZIP;
-    else
-        rpt->decompressor.algorithm = COMPRESSION_ALGORITHM_NONE;
-
-    if(rpt->decompressor.algorithm != COMPRESSION_ALGORITHM_NONE) {
-        rrdpush_decompressor_init(&rpt->decompressor);
-        return true;
-    }
-
-    return false;
-}
-
-/*
-* In case of stream compression buffer overflow
-* Inform the user through the error log file and
-* deactivate compression by downgrading the stream protocol.
-*/
-void rrdpush_compression_deactivate(struct sender_state *s) {
-    switch(s->compressor.algorithm) {
-        case COMPRESSION_ALGORITHM_MAX:
-        case COMPRESSION_ALGORITHM_NONE:
-            netdata_log_error("STREAM_COMPRESSION: compression error on 'host:%s' without any compression enabled. Ignoring error.",
-                    rrdhost_hostname(s->host));
-            break;
-
-        case COMPRESSION_ALGORITHM_GZIP:
-            netdata_log_error("STREAM_COMPRESSION: GZIP compression error on 'host:%s'. Disabling GZIP for this node.",
-                    rrdhost_hostname(s->host));
-            s->disabled_capabilities |= STREAM_CAP_GZIP;
-            break;
-
-        case COMPRESSION_ALGORITHM_LZ4:
-            netdata_log_error("STREAM_COMPRESSION: LZ4 compression error on 'host:%s'. Disabling ZSTD for this node.",
-                    rrdhost_hostname(s->host));
-            s->disabled_capabilities |= STREAM_CAP_LZ4;
-            break;
-
-        case COMPRESSION_ALGORITHM_ZSTD:
-            netdata_log_error("STREAM_COMPRESSION: ZSTD compression error on 'host:%s'. Disabling ZSTD for this node.",
-                    rrdhost_hostname(s->host));
-            s->disabled_capabilities |= STREAM_CAP_ZSTD;
-            break;
-
-        case COMPRESSION_ALGORITHM_BROTLI:
-            netdata_log_error("STREAM_COMPRESSION: BROTLI compression error on 'host:%s'. Disabling BROTLI for this node.",
-                    rrdhost_hostname(s->host));
-            s->disabled_capabilities |= STREAM_CAP_BROTLI;
-            break;
-    }
-}
-
-// ----------------------------------------------------------------------------
-// compressor public API
-
-void rrdpush_compressor_init(struct compressor_state *state) {
-    switch(state->algorithm) {
-#ifdef ENABLE_ZSTD
-        case COMPRESSION_ALGORITHM_ZSTD:
-            rrdpush_compressor_init_zstd(state);
-            break;
-#endif
-
-#ifdef ENABLE_LZ4
-        case COMPRESSION_ALGORITHM_LZ4:
-            rrdpush_compressor_init_lz4(state);
-            break;
-#endif
-
-#ifdef ENABLE_BROTLI
-        case COMPRESSION_ALGORITHM_BROTLI:
-            rrdpush_compressor_init_brotli(state);
-            break;
-#endif
-
-        default:
-        case COMPRESSION_ALGORITHM_GZIP:
-            rrdpush_compressor_init_gzip(state);
-            break;
-    }
-
-    simple_ring_buffer_reset(&state->input);
-    simple_ring_buffer_reset(&state->output);
-}
-
-void rrdpush_compressor_destroy(struct compressor_state *state) {
-    switch(state->algorithm) {
-#ifdef ENABLE_ZSTD
-        case COMPRESSION_ALGORITHM_ZSTD:
-            rrdpush_compressor_destroy_zstd(state);
-            break;
-#endif
-
-#ifdef ENABLE_LZ4
-        case COMPRESSION_ALGORITHM_LZ4:
-            rrdpush_compressor_destroy_lz4(state);
-            break;
-#endif
-
-#ifdef ENABLE_BROTLI
-        case COMPRESSION_ALGORITHM_BROTLI:
-            rrdpush_compressor_destroy_brotli(state);
-            break;
-#endif
-
-        default:
-        case COMPRESSION_ALGORITHM_GZIP:
-            rrdpush_compressor_destroy_gzip(state);
-            break;
-    }
-
-    state->initialized = false;
-
-    simple_ring_buffer_destroy(&state->input);
-    simple_ring_buffer_destroy(&state->output);
-}
-
-size_t rrdpush_compress(struct compressor_state *state, const char *data, size_t size, const char **out) {
-    size_t ret = 0;
-
-    switch(state->algorithm) {
-#ifdef ENABLE_ZSTD
-        case COMPRESSION_ALGORITHM_ZSTD:
-            ret = rrdpush_compress_zstd(state, data, size, out);
-            break;
-#endif
-
-#ifdef ENABLE_LZ4
-        case COMPRESSION_ALGORITHM_LZ4:
-            ret = rrdpush_compress_lz4(state, data, size, out);
-            break;
-#endif
-
-#ifdef ENABLE_BROTLI
-        case COMPRESSION_ALGORITHM_BROTLI:
-            ret = rrdpush_compress_brotli(state, data, size, out);
-            break;
-#endif
-
-        default:
-        case COMPRESSION_ALGORITHM_GZIP:
-            ret = rrdpush_compress_gzip(state, data, size, out);
-            break;
-    }
-
-    if(unlikely(ret >= COMPRESSION_MAX_CHUNK)) {
-        netdata_log_error("RRDPUSH_COMPRESS: compressed data is %zu bytes, which is >= than the max chunk size %d",
-                ret, COMPRESSION_MAX_CHUNK);
-        return 0;
-    }
-
-    return ret;
-}
-
-// ----------------------------------------------------------------------------
-// decompressor public API
-
-void rrdpush_decompressor_destroy(struct decompressor_state *state) {
-    if(unlikely(!state->initialized))
-        return;
-
-    switch(state->algorithm) {
-#ifdef ENABLE_ZSTD
-        case COMPRESSION_ALGORITHM_ZSTD:
-            rrdpush_decompressor_destroy_zstd(state);
-            break;
-#endif
-
-#ifdef ENABLE_LZ4
-        case COMPRESSION_ALGORITHM_LZ4:
-            rrdpush_decompressor_destroy_lz4(state);
-            break;
-#endif
-
-#ifdef ENABLE_BROTLI
-        case COMPRESSION_ALGORITHM_BROTLI:
-            rrdpush_decompressor_destroy_brotli(state);
-            break;
-#endif
-
-        default:
-        case COMPRESSION_ALGORITHM_GZIP:
-            rrdpush_decompressor_destroy_gzip(state);
-            break;
-    }
-
-    simple_ring_buffer_destroy(&state->output);
-
-    state->initialized = false;
-}
-
-void rrdpush_decompressor_init(struct decompressor_state *state) {
-    switch(state->algorithm) {
-#ifdef ENABLE_ZSTD
-        case COMPRESSION_ALGORITHM_ZSTD:
-            rrdpush_decompressor_init_zstd(state);
-            break;
-#endif
-
-#ifdef ENABLE_LZ4
-        case COMPRESSION_ALGORITHM_LZ4:
-            rrdpush_decompressor_init_lz4(state);
-            break;
-#endif
-
-#ifdef ENABLE_BROTLI
-        case COMPRESSION_ALGORITHM_BROTLI:
-            rrdpush_decompressor_init_brotli(state);
-            break;
-#endif
-
-        default:
-        case COMPRESSION_ALGORITHM_GZIP:
-            rrdpush_decompressor_init_gzip(state);
-            break;
-    }
-
-    state->signature_size = RRDPUSH_COMPRESSION_SIGNATURE_SIZE;
-    simple_ring_buffer_reset(&state->output);
-}
-
-size_t rrdpush_decompress(struct decompressor_state *state, const char *compressed_data, size_t compressed_size) {
-    if (unlikely(state->output.read_pos != state->output.write_pos))
-        fatal("RRDPUSH_DECOMPRESS: asked to decompress new data, while there are unread data in the decompression buffer!");
-
-    size_t ret = 0;
-
-    switch(state->algorithm) {
-#ifdef ENABLE_ZSTD
-        case COMPRESSION_ALGORITHM_ZSTD:
-            ret = rrdpush_decompress_zstd(state, compressed_data, compressed_size);
-            break;
-#endif
-
-#ifdef ENABLE_LZ4
-        case COMPRESSION_ALGORITHM_LZ4:
-            ret = rrdpush_decompress_lz4(state, compressed_data, compressed_size);
-            break;
-#endif
-
-#ifdef ENABLE_BROTLI
-        case COMPRESSION_ALGORITHM_BROTLI:
-            ret = rrdpush_decompress_brotli(state, compressed_data, compressed_size);
-            break;
-#endif
-
-        default:
-        case COMPRESSION_ALGORITHM_GZIP:
-            ret = rrdpush_decompress_gzip(state, compressed_data, compressed_size);
-            break;
-    }
-
-    // for backwards compatibility we cannot check for COMPRESSION_MAX_MSG_SIZE,
-    // because old children may send this big payloads.
-    if(unlikely(ret > COMPRESSION_MAX_CHUNK)) {
-        netdata_log_error("RRDPUSH_DECOMPRESS: decompressed data is %zu bytes, which is bigger than the max msg size %d",
-                          ret, COMPRESSION_MAX_CHUNK);
-        return 0;
-    }
-
-    return ret;
-}
-
-// ----------------------------------------------------------------------------
-// unit test
-
-static inline long int my_random (void) {
-    return random();
-}
-
-void unittest_generate_random_name(char *dst, size_t size) {
-    if(size < 7)
-        size = 7;
-
-    size_t len = 5 + my_random() % (size - 6);
-
-    for(size_t i = 0; i < len ; i++) {
-        if(my_random() % 2 == 0)
-            dst[i] = 'A' + my_random() % 26;
-        else
-            dst[i] = 'a' + my_random() % 26;
-    }
-
-    dst[len] = '\0';
-}
-
-void unittest_generate_message(BUFFER *wb, time_t now_s, size_t counter) {
-    bool with_slots = true;
-    NUMBER_ENCODING integer_encoding = NUMBER_ENCODING_BASE64;
-    NUMBER_ENCODING doubles_encoding = NUMBER_ENCODING_BASE64;
-    time_t update_every = 1;
-    time_t point_end_time_s = now_s;
-    time_t wall_clock_time_s = now_s;
-    size_t chart_slot = counter + 1;
-    size_t dimensions = 2 + my_random() % 5;
-    char chart[RRD_ID_LENGTH_MAX + 1] = "name";
-    unittest_generate_random_name(chart, 5 + my_random() % 30);
-
-    buffer_fast_strcat(wb, PLUGINSD_KEYWORD_BEGIN_V2, sizeof(PLUGINSD_KEYWORD_BEGIN_V2) - 1);
-
-    if(with_slots) {
-        buffer_fast_strcat(wb, " "PLUGINSD_KEYWORD_SLOT":", sizeof(PLUGINSD_KEYWORD_SLOT) - 1 + 2);
-        buffer_print_uint64_encoded(wb, integer_encoding, chart_slot);
-    }
-
-    buffer_fast_strcat(wb, " '", 2);
-    buffer_strcat(wb, chart);
-    buffer_fast_strcat(wb, "' ", 2);
-    buffer_print_uint64_encoded(wb, integer_encoding, update_every);
-    buffer_fast_strcat(wb, " ", 1);
-    buffer_print_uint64_encoded(wb, integer_encoding, point_end_time_s);
-    buffer_fast_strcat(wb, " ", 1);
-    if(point_end_time_s == wall_clock_time_s)
-        buffer_fast_strcat(wb, "#", 1);
-    else
-        buffer_print_uint64_encoded(wb, integer_encoding, wall_clock_time_s);
-    buffer_fast_strcat(wb, "\n", 1);
-
-
-    for(size_t d = 0; d < dimensions ;d++) {
-        size_t dim_slot = d + 1;
-        char dim_id[RRD_ID_LENGTH_MAX + 1] = "dimension";
-        unittest_generate_random_name(dim_id, 10 + my_random() % 20);
-        int64_t last_collected_value = (my_random() % 2 == 0) ? (int64_t)(counter + d) : (int64_t)my_random();
-        NETDATA_DOUBLE value = (my_random() % 2 == 0) ? (NETDATA_DOUBLE)my_random() / ((NETDATA_DOUBLE)my_random() + 1) : (NETDATA_DOUBLE)last_collected_value;
-        SN_FLAGS flags = (my_random() % 1000 == 0) ? SN_FLAG_NONE : SN_FLAG_NOT_ANOMALOUS;
-
-        buffer_fast_strcat(wb, PLUGINSD_KEYWORD_SET_V2, sizeof(PLUGINSD_KEYWORD_SET_V2) - 1);
-
-        if(with_slots) {
-            buffer_fast_strcat(wb, " "PLUGINSD_KEYWORD_SLOT":", sizeof(PLUGINSD_KEYWORD_SLOT) - 1 + 2);
-            buffer_print_uint64_encoded(wb, integer_encoding, dim_slot);
-        }
-
-        buffer_fast_strcat(wb, " '", 2);
-        buffer_strcat(wb, dim_id);
-        buffer_fast_strcat(wb, "' ", 2);
-        buffer_print_int64_encoded(wb, integer_encoding, last_collected_value);
-        buffer_fast_strcat(wb, " ", 1);
-
-        if((NETDATA_DOUBLE)last_collected_value == value)
-            buffer_fast_strcat(wb, "#", 1);
-        else
-            buffer_print_netdata_double_encoded(wb, doubles_encoding, value);
-
-        buffer_fast_strcat(wb, " ", 1);
-        buffer_print_sn_flags(wb, flags, true);
-        buffer_fast_strcat(wb, "\n", 1);
-    }
-
-    buffer_fast_strcat(wb, PLUGINSD_KEYWORD_END_V2 "\n", sizeof(PLUGINSD_KEYWORD_END_V2) - 1 + 1);
-}
-
-int unittest_rrdpush_compression_speed(compression_algorithm_t algorithm, const char *name) {
-    fprintf(stderr, "\nTesting streaming compression speed with %s\n", name);
-
-    struct compressor_state cctx =  {
-            .initialized = false,
-            .algorithm = algorithm,
-    };
-    struct decompressor_state dctx = {
-            .initialized = false,
-            .algorithm = algorithm,
-    };
-
-    rrdpush_compressor_init(&cctx);
-    rrdpush_decompressor_init(&dctx);
-
-    int errors = 0;
-
-    BUFFER *wb = buffer_create(COMPRESSION_MAX_MSG_SIZE, NULL);
-    time_t now_s = now_realtime_sec();
-    usec_t compression_ut = 0;
-    usec_t decompression_ut = 0;
-    size_t bytes_compressed = 0;
-    size_t bytes_uncompressed = 0;
-
-    usec_t compression_started_ut = now_monotonic_usec();
-    usec_t decompression_started_ut = compression_started_ut;
-
-    for(int i = 0; i < 10000 ;i++) {
-        compression_started_ut = now_monotonic_usec();
-        decompression_ut += compression_started_ut - decompression_started_ut;
-
-        buffer_flush(wb);
-        while(buffer_strlen(wb) < COMPRESSION_MAX_MSG_SIZE - 1024)
-            unittest_generate_message(wb, now_s, i);
-
-        const char *txt = buffer_tostring(wb);
-        size_t txt_len = buffer_strlen(wb);
-        bytes_uncompressed += txt_len;
-
-        const char *out;
-        size_t size = rrdpush_compress(&cctx, txt, txt_len, &out);
-
-        bytes_compressed += size;
-        decompression_started_ut = now_monotonic_usec();
-        compression_ut += decompression_started_ut - compression_started_ut;
-
-        if(size == 0) {
-            fprintf(stderr, "iteration %d: compressed size %zu is zero\n",
-                    i, size);
-            errors++;
-            goto cleanup;
-        }
-        else if(size >= COMPRESSION_MAX_CHUNK) {
-            fprintf(stderr, "iteration %d: compressed size %zu exceeds max allowed size\n",
-                    i, size);
-            errors++;
-            goto cleanup;
-        }
-        else {
-            size_t dtxt_len = rrdpush_decompress(&dctx, out, size);
-            char *dtxt = (char *) &dctx.output.data[dctx.output.read_pos];
-
-            if(rrdpush_decompressed_bytes_in_buffer(&dctx) != dtxt_len) {
-                fprintf(stderr, "iteration %d: decompressed size %zu does not rrdpush_decompressed_bytes_in_buffer() %zu\n",
-                        i, dtxt_len, rrdpush_decompressed_bytes_in_buffer(&dctx)
-                       );
-                errors++;
-                goto cleanup;
-            }
-
-            if(!dtxt_len) {
-                fprintf(stderr, "iteration %d: decompressed size is zero\n", i);
-                errors++;
-                goto cleanup;
-            }
-            else if(dtxt_len != txt_len) {
-                fprintf(stderr, "iteration %d: decompressed size %zu does not match original size %zu\n",
-                        i, dtxt_len, txt_len
-                       );
-                errors++;
-                goto cleanup;
-            }
-            else {
-                if(memcmp(txt, dtxt, txt_len) != 0) {
-                    fprintf(stderr, "iteration %d: decompressed data '%s' do not match original data length %zu\n",
-                            i, dtxt, txt_len);
-                    errors++;
-                    goto cleanup;
-                }
-            }
-        }
-
-        // here we are supposed to copy the data and advance the position
-        dctx.output.read_pos += rrdpush_decompressed_bytes_in_buffer(&dctx);
-    }
-
-cleanup:
-    rrdpush_compressor_destroy(&cctx);
-    rrdpush_decompressor_destroy(&dctx);
-
-    if(errors)
-        fprintf(stderr, "Compression with %s: FAILED (%d errors)\n", name, errors);
-    else
-        fprintf(stderr, "Compression with %s: OK "
-                        "(compression %zu usec, decompression %zu usec, bytes raw %zu, compressed %zu, savings ratio %0.2f%%)\n",
-                        name, compression_ut, decompression_ut,
-                        bytes_uncompressed, bytes_compressed,
-                        100.0 - (double)bytes_compressed * 100.0 / (double)bytes_uncompressed);
-
-    return errors;
-}
-
-int unittest_rrdpush_compression(compression_algorithm_t algorithm, const char *name) {
-    fprintf(stderr, "\nTesting streaming compression with %s\n", name);
-
-    struct compressor_state cctx =  {
-            .initialized = false,
-            .algorithm = algorithm,
-    };
-    struct decompressor_state dctx = {
-            .initialized = false,
-            .algorithm = algorithm,
-    };
-
-    char txt[COMPRESSION_MAX_MSG_SIZE];
-
-    rrdpush_compressor_init(&cctx);
-    rrdpush_decompressor_init(&dctx);
-
-    int errors = 0;
-
-    memset(txt, '=', COMPRESSION_MAX_MSG_SIZE);
-
-    for(int i = 0; i < COMPRESSION_MAX_MSG_SIZE ;i++) {
-        txt[i] = 'A' + (i % 26);
-        size_t txt_len = i + 1;
-
-        const char *out;
-        size_t size = rrdpush_compress(&cctx, txt, txt_len, &out);
-
-        if(size == 0) {
-            fprintf(stderr, "iteration %d: compressed size %zu is zero\n",
-                    i, size);
-            errors++;
-            goto cleanup;
-        }
-        else if(size >= COMPRESSION_MAX_CHUNK) {
-            fprintf(stderr, "iteration %d: compressed size %zu exceeds max allowed size\n",
-                    i, size);
-            errors++;
-            goto cleanup;
-        }
-        else {
-            size_t dtxt_len = rrdpush_decompress(&dctx, out, size);
-            char *dtxt = (char *) &dctx.output.data[dctx.output.read_pos];
-
-            if(rrdpush_decompressed_bytes_in_buffer(&dctx) != dtxt_len) {
-                fprintf(stderr, "iteration %d: decompressed size %zu does not rrdpush_decompressed_bytes_in_buffer() %zu\n",
-                        i, dtxt_len, rrdpush_decompressed_bytes_in_buffer(&dctx)
-                       );
-                errors++;
-                goto cleanup;
-            }
-
-            if(!dtxt_len) {
-                fprintf(stderr, "iteration %d: decompressed size is zero\n", i);
-                errors++;
-                goto cleanup;
-            }
-            else if(dtxt_len != txt_len) {
-                fprintf(stderr, "iteration %d: decompressed size %zu does not match original size %zu\n",
-                        i, dtxt_len, txt_len
-                       );
-                errors++;
-                goto cleanup;
-            }
-            else {
-                if(memcmp(txt, dtxt, txt_len) != 0) {
-                    txt[txt_len] = '\0';
-                    dtxt[txt_len + 5] = '\0';
-
-                    fprintf(stderr, "iteration %d: decompressed data '%s' do not match original data '%s' of length %zu\n",
-                            i, dtxt, txt, txt_len);
-                    errors++;
-                    goto cleanup;
-                }
-            }
-        }
-
-        // fill the compressed buffer with garbage
-        memset((void *)out, 'x', size);
-
-        // here we are supposed to copy the data and advance the position
-        dctx.output.read_pos += rrdpush_decompressed_bytes_in_buffer(&dctx);
-    }
-
-cleanup:
-    rrdpush_compressor_destroy(&cctx);
-    rrdpush_decompressor_destroy(&dctx);
-
-    if(errors)
-        fprintf(stderr, "Compression with %s: FAILED (%d errors)\n", name, errors);
-    else
-        fprintf(stderr, "Compression with %s: OK\n", name);
-
-    return errors;
-}
-
-int unittest_rrdpush_compressions(void) {
-    int ret = 0;
-
-    ret += unittest_rrdpush_compression(COMPRESSION_ALGORITHM_ZSTD, "ZSTD");
-    ret += unittest_rrdpush_compression(COMPRESSION_ALGORITHM_LZ4, "LZ4");
-    ret += unittest_rrdpush_compression(COMPRESSION_ALGORITHM_BROTLI, "BROTLI");
-    ret += unittest_rrdpush_compression(COMPRESSION_ALGORITHM_GZIP, "GZIP");
-
-    ret += unittest_rrdpush_compression_speed(COMPRESSION_ALGORITHM_ZSTD, "ZSTD");
-    ret += unittest_rrdpush_compression_speed(COMPRESSION_ALGORITHM_LZ4, "LZ4");
-    ret += unittest_rrdpush_compression_speed(COMPRESSION_ALGORITHM_BROTLI, "BROTLI");
-    ret += unittest_rrdpush_compression_speed(COMPRESSION_ALGORITHM_GZIP, "GZIP");
-
-    return ret;
-}