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brzip.c
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brzip.c
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/*
* brzip compression utility
* Copyright (C) 2020 Matija Skala <[email protected]>
*
* brzip is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* brzip is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with brzip. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <signal.h>
#ifdef USE_LIBMD
#include <sha256.h>
#else
#include <openssl/sha.h>
#endif
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/sysinfo.h>
#include <unistd.h>
#include <brotli/decode.h>
#include <brotli/encode.h>
#include <pthread.h>
#include <xxhash.h>
#include "gsb_crc32.h"
typedef struct {
uint8_t *data;
uint32_t size;
uint64_t id;
} *packet_t;
typedef struct _offset_list *offset_list_t;
struct _offset_list {
offset_list_t next;
off_t off;
};
struct _courier {
uint8_t check_type;
uint8_t quality;
const char *filename;
const time_t *timestamp;
uint32_t nthreads;
uint64_t datalen;
pthread_t *worker_threads;
pthread_t muxer_thread;
FILE *out;
uint64_t receive_id;
uint64_t distrib_id;
uint64_t deliver_id;
packet_t ibuffer;
packet_t *obuffer;
uint32_t working;
uint32_t slots;
uint32_t free_slots;
pthread_mutex_t tmutex;
pthread_cond_t slot_av;
pthread_mutex_t imutex;
pthread_cond_t iav_or_eof;
pthread_mutex_t omutex;
pthread_cond_t oav_or_exit;
bool eof;
bool error;
char *input_str;
char *output_str;
};
typedef struct _courier *courier_t;
static int64_t leap_seconds[][2] = {
#include "leap_seconds.h"
};
static char *output_file = NULL;
static void free_global(char **ptr) {
void *p = *ptr;
*ptr = NULL;
free(p);
}
static time_t tai64tounix(int64_t t) {
t += 2208988800;
int l = sizeof leap_seconds/128;
int i = 0, j = l;
while (i + 1 < j) {
if (leap_seconds[(i+j)/2][0] + leap_seconds[(i+j)/2][1] > t)
j = (i+j)/2;
else
i = (i+j)/2;
}
t -= 2208988800;
return t - leap_seconds[i][1];
}
static int64_t unixtotai64(time_t t) {
t += 2208988800;
int l = sizeof leap_seconds/128;
int i = 0, j = l;
while (i + 1 < j) {
if (leap_seconds[(i+j)/2][0] > t)
j = (i+j)/2;
else
i = (i+j)/2;
}
t -= 2208988800;
return t + leap_seconds[i][1];
}
courier_t brzip_start(uint8_t quality, uint32_t nthreads, const char *input_str, const char *output_str, FILE *out, void *(*worker)(courier_t), void *(*muxer)(courier_t)) {
courier_t r = malloc(sizeof *r);
if (!r)
err(1, "malloc");
r->working = r->nthreads = nthreads;
r->free_slots = r->slots = nthreads > 1 ? nthreads * 2 : 1;
r->receive_id = r->distrib_id = r->deliver_id = 0;
r->ibuffer = calloc(r->slots, sizeof *r->ibuffer);
r->obuffer = calloc(r->slots, sizeof *r->obuffer);
if (!r->ibuffer || !r->obuffer)
err(1, "calloc");
r->input_str = strdup(input_str);
r->output_str = strdup(output_str);
if (!r->input_str || !r->output_str)
err(1, "strdup");
r->eof = false;
r->error = false;
errno = pthread_mutex_init(&r->tmutex, 0);
if (errno)
err(1, NULL);
errno = pthread_cond_init(&r->slot_av, 0);
if (errno)
err(1, NULL);
errno = pthread_mutex_init(&r->imutex, 0);
if (errno)
err(1, NULL);
errno = pthread_cond_init(&r->iav_or_eof, 0);
if (errno)
err(1, NULL);
errno = pthread_mutex_init(&r->omutex, 0);
if (errno)
err(1, NULL);
errno = pthread_cond_init(&r->oav_or_exit, 0);
if (errno)
err(1, NULL);
r->datalen = 0;
r->check_type = 3;
r->filename = NULL;
r->timestamp = NULL;
r->quality = quality;
r->out = out;
r->worker_threads = malloc(nthreads * sizeof(pthread_t));
for (uint32_t i = 0; i < nthreads; i++) {
errno = pthread_create(&r->worker_threads[i], 0, (void *(*)(void*))worker, r);
if (errno)
err(1, NULL);
}
errno = pthread_create(&r->muxer_thread, 0, (void *(*)(void*))muxer, r);
if (errno)
err(1, NULL);
return r;
}
void brzip_add_block(courier_t ptr, uint8_t *data, uint32_t size) {
errno = pthread_mutex_lock(&ptr->tmutex);
if (errno)
err(1, NULL);
while (!ptr->free_slots)
pthread_cond_wait(&ptr->slot_av, &ptr->tmutex);
ptr->free_slots--;
errno = pthread_mutex_unlock(&ptr->tmutex);
if (errno)
err(1, NULL);
errno = pthread_mutex_lock(&ptr->imutex);
if (errno)
err(1, NULL);
packet_t packet = &ptr->ibuffer[ptr->receive_id % ptr->slots];
packet->data = data;
packet->size = size;
packet->id = ptr->receive_id++;
errno = pthread_cond_signal(&ptr->iav_or_eof);
if (errno)
err(1, NULL);
errno = pthread_mutex_unlock(&ptr->imutex);
if (errno)
err(1, NULL);
}
bool brzip_finish(courier_t ptr) {
errno = pthread_mutex_lock(&ptr->imutex);
if (errno)
err(1, NULL);
ptr->eof = true;
errno = pthread_cond_broadcast(&ptr->iav_or_eof);
if (errno)
err(1, NULL);
errno = pthread_mutex_unlock(&ptr->imutex);
if (errno)
err(1, NULL);
for (uint32_t i = 0; i < ptr->nthreads; i++) {
errno = pthread_join(ptr->worker_threads[i], NULL);
if (errno)
err(1, NULL);
}
free(ptr->worker_threads);
errno = pthread_join(ptr->muxer_thread, NULL);
if (errno)
err(1, NULL);
errno = pthread_cond_destroy(&ptr->oav_or_exit);
if (errno)
err(1, NULL);
errno = pthread_mutex_destroy(&ptr->omutex);
if (errno)
err(1, NULL);
errno = pthread_cond_destroy(&ptr->iav_or_eof);
if (errno)
err(1, NULL);
errno = pthread_mutex_destroy(&ptr->imutex);
if (errno)
err(1, NULL);
errno = pthread_cond_destroy(&ptr->slot_av);
if (errno)
err(1, NULL);
errno = pthread_mutex_destroy(&ptr->tmutex);
if (errno)
err(1, NULL);
for (size_t i = 0; i < ptr->slots; i++)
if (ptr->obuffer[i])
free(ptr->obuffer[i]->data);
bool ok = !ptr->error;
free(ptr->ibuffer);
free(ptr->obuffer);
free(ptr->input_str);
free(ptr->output_str);
free(ptr);
return ok;
}
static void show_progress() {} // stub
static void *comp_worker(courier_t arg) {
for (;;) {
errno = pthread_mutex_lock(&arg->imutex);
if (errno)
err(1, NULL);
packet_t packet = NULL;
while (arg->receive_id == arg->distrib_id && !arg->eof && !arg->error) {
errno = pthread_cond_wait(&arg->iav_or_eof, &arg->imutex);
if (errno)
err(1, NULL);
}
if (arg->receive_id != arg->distrib_id)
packet = &arg->ibuffer[arg->distrib_id++ % arg->slots];
errno = pthread_mutex_unlock(&arg->imutex);
if (errno)
err(1, NULL);
if (!packet) {
errno = pthread_mutex_lock(&arg->omutex);
if (errno)
err(1, NULL);
if (!--arg->working) {
errno = pthread_cond_signal(&arg->oav_or_exit);
if (errno)
err(1, NULL);
}
errno = pthread_mutex_unlock(&arg->omutex);
if (errno)
err(1, NULL);
return NULL;
}
BrotliEncoderState *encoder = BrotliEncoderCreateInstance(NULL, NULL, NULL);
if (!encoder)
err(1, "BrotliEncoderCreateInstance");
BrotliEncoderSetParameter(encoder, BROTLI_PARAM_QUALITY, arg->quality);
size_t output_buffer_length = BrotliEncoderMaxCompressedSize(packet->size) + 32;
size_t namelen = arg->filename ? strlen(arg->filename) : 0;
if (output_buffer_length == 0 || arg->quality < 2)
output_buffer_length = packet->size * 2 + 32;
if (arg->filename)
output_buffer_length += namelen;
uint8_t *output_buffer = malloc(output_buffer_length);
size_t available_in = packet->size;
const uint8_t *next_in = packet->data;
size_t available_out = output_buffer_length;
uint8_t *next_out = output_buffer;
if (packet->id == 0 && (arg->filename || arg->timestamp)) {
*next_out = 0;
if (arg->timestamp)
*next_out |= 1;
if (arg->filename)
*next_out |= 2;
*next_out |= (0x34cb00 >> ((*next_out ^ (*next_out >> 4)) & 0xf)) & 0x80;
if (arg->timestamp) {
int64_t i = unixtotai64(*arg->timestamp < 0 ? ~*arg->timestamp << 1 | 1 : *arg->timestamp << 1);
do {
available_out--;
*++next_out = i & 0x7f;
} while (i >>= 7);
*next_out |= 0x80;
}
if (arg->filename) {
int64_t i = namelen;
do {
available_out--;
*++next_out = i & 0x7f;
} while (i >>= 7);
*next_out |= 0x80;
memcpy(next_out + 1, arg->filename, namelen);
available_out -= namelen;
next_out += namelen;
}
available_out--;
next_out++;
}
do {
if (!BrotliEncoderCompressStream(encoder, BROTLI_OPERATION_FINISH, &available_in, &next_in, &available_out, &next_out, NULL)) {
errx(1, "coder failed");
}
if (available_out < 16) {
available_out += output_buffer_length;
size_t offset = next_out - output_buffer;
output_buffer = realloc(output_buffer, output_buffer_length *= 2);
next_out = output_buffer + offset;
}
} while (!BrotliEncoderIsFinished(encoder));
BrotliEncoderDestroyInstance(encoder);
{
uint32_t i = packet->size;
do
*next_out++ = i & 0x7f;
while (i >>= 7);
*(next_out-1) |= 0x80;
}
switch (arg->check_type) {
XXH32_hash_t xxh32sum;
XXH64_hash_t xxh64sum;
uint32_t crc32csum;
case 0:
case 1:
case 2:
xxh32sum = XXH32(packet->data, packet->size, 0);
for (uint8_t i = 0; i < 1 << arg->check_type; i++) {
*next_out++ = xxh32sum & 0xff;
xxh32sum >>= 8;
}
break;
case 3:
xxh64sum = XXH64(packet->data, packet->size, 0);
for (uint8_t i = 0; i < 1 << arg->check_type; i++) {
*next_out++ = xxh64sum & 0xff;
xxh64sum >>= 8;
}
break;
case 4:
case 5:
case 6:
crc32csum = ~calculate_crc32c(~0, packet->data, packet->size);
for (uint8_t i = 0; i < 1 << (arg->check_type - 4); i++) {
*next_out++ = crc32csum & 0xff;
crc32csum >>= 8;
}
}
free(packet->data);
errno = pthread_mutex_lock(&arg->omutex);
if (errno)
err(1, NULL);
arg->datalen += packet->size;
packet->data = output_buffer;
packet->size = next_out - output_buffer;
if (packet->size > 0)
show_progress(packet->size);
if (arg->obuffer[packet->id % arg->slots])
errx(1, "internal error");
arg->obuffer[packet->id % arg->slots] = packet;
if (packet->id == arg->deliver_id) {
errno = pthread_cond_signal(&arg->oav_or_exit);
if (errno)
err(1, NULL);
}
errno = pthread_mutex_unlock(&arg->omutex);
if (errno)
err(1, NULL);
}
}
static void *decomp_worker(courier_t arg) {
packet_t packet;
for (;;) {
errno = pthread_mutex_lock(&arg->imutex);
if (errno)
err(1, NULL);
packet = NULL;
while (arg->receive_id == arg->distrib_id && !arg->eof && !arg->error) {
errno = pthread_cond_wait(&arg->iav_or_eof, &arg->imutex);
if (errno)
err(1, NULL);
}
if (arg->receive_id != arg->distrib_id)
packet = &arg->ibuffer[arg->distrib_id++ % arg->slots];
errno = pthread_mutex_unlock(&arg->imutex);
if (errno)
err(1, NULL);
if (!packet) {
errno = pthread_mutex_lock(&arg->omutex);
if (errno)
err(1, NULL);
if (!--arg->working) {
errno = pthread_cond_signal(&arg->oav_or_exit);
if (errno)
err(1, NULL);
}
errno = pthread_mutex_unlock(&arg->omutex);
if (errno)
err(1, NULL);
return NULL;
}
size_t output_buffer_length = packet->size * 3;
uint8_t *output_buffer = malloc(output_buffer_length);
size_t available_in = packet->size;
const uint8_t *next_in = packet->data;
size_t available_out = output_buffer_length;
uint8_t *next_out = output_buffer;
for (int iteration = 1; available_in; iteration++) {
if (packet->id != 0 && iteration != 1) {
warnx("%s: corrupt input", arg->input_str);
goto fail;
}
if (0x34cb00 >> ((*next_in ^ (*next_in >> 4)) & 0xf) & 0x80) {
warnx("%s: corrupt input", arg->input_str);
goto fail;
}
uint8_t content_mask = *next_in & 0x7f;
int check_type = content_mask & 7;
if (content_mask & 020)
do {
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
} while ((*next_in & 0x80) == 0);
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
if (check_type == 7) {
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
}
if (content_mask & 0100) {
if (0x34cb00 >> ((*next_in ^ (*next_in >> 4)) & 0xf) & 0x80) {
warnx("%s: corrupt input", arg->input_str);
goto fail;
}
uint8_t extra_mask = *next_in;
if (extra_mask & 1)
do {
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
} while ((*next_in & 0x80) == 0);
if (extra_mask & 2) {
uint64_t v = 0;
unsigned exp = 0;
do {
if (exp >= 4) {
warnx("%s: too long stored filename (at %uth byte)", arg->input_str, exp);
goto fail;
}
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
v += (uint32_t)(*next_in & 0x7f) << (exp++ * 7);
} while ((*next_in & 0x80) == 0);
available_in -= v;
next_in += v;
if (available_in + v <= v) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
}
if (extra_mask & 4) {
uint64_t v = 0;
unsigned exp = 0;
do {
if (exp * 7 >= 64) {
warnx("%s: too long extra field (at %uth byte)", arg->input_str, exp);
goto fail;
}
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
v += (uint64_t)(*next_in & 0x7f) << (exp++ * 7);
} while ((*next_in & 0x80) == 0);
available_in -= v;
next_in += v;
if (available_in + v <= v) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
}
if (extra_mask & 0100) {
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
if (0x34cb00 >> ((*next_in ^ (*next_in >> 4)) & 0xf) & 0x80) {
warnx("%s: corrupt input", arg->input_str);
goto fail;
}
if (*next_in & 7) {
warnx("%s: unknown compression method", arg->input_str);
goto fail;
}
}
if (extra_mask & 040) {
if (available_in <= 2) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
available_in -= 2;
next_in += 2;
}
available_in--;
next_in++;
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
}
bool finished = false;
BrotliDecoderState *decoder = BrotliDecoderCreateInstance(NULL, NULL, NULL);
if (!decoder)
err(1, "BrotliDecoderCreateInstance");
while (!finished)
switch (BrotliDecoderDecompressStream(decoder, &available_in, &next_in, &available_out, &next_out, NULL)) {
case BROTLI_DECODER_RESULT_SUCCESS:
finished = true;
break;
case BROTLI_DECODER_RESULT_ERROR:
warnx("%s: brotli decoder failed: %s", arg->input_str, BrotliDecoderErrorString(BrotliDecoderGetErrorCode(decoder)));
goto fail;
case BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT:
warnx("%s: incomplete block", arg->input_str);
goto fail;
case BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT:
available_out += output_buffer_length;
size_t offset = next_out - output_buffer;
output_buffer = realloc(output_buffer, output_buffer_length *= 2);
next_out = output_buffer + offset;
}
BrotliDecoderDestroyInstance(decoder);
if (content_mask & 010) {
uint32_t i = next_out - output_buffer;
do {
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
if ((*next_in & 0x7f) != (i & 0x7f)) {
warnx("%s: invalid uncompressed size", arg->input_str);
goto fail;
}
i >>= 7;
available_in--;
} while ((*next_in++ & 0x80) == 0);
if (i != 0) {
warnx("%s: invalid uncompressed size", arg->input_str);
goto fail;
}
}
switch (check_type) {
XXH32_hash_t xxh32sum;
XXH64_hash_t xxh64sum;
uint32_t crc32csum;
SHA256_CTX sha256;
uint8_t digest[32];
case 0:
case 1:
case 2:
xxh32sum = XXH32(output_buffer, next_out - output_buffer, 0);
for (uint8_t i = 0; i < 1 << check_type; i++) {
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
if (*next_in++ != (xxh32sum & 0xff)) {
warnx("%s: invalid checksum", arg->input_str);
goto fail;
}
available_in--;
xxh32sum >>= 8;
}
break;
case 3:
xxh64sum = XXH64(output_buffer, next_out - output_buffer, 0);
for (uint8_t i = 0; i < 1 << check_type; i++) {
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
if (*next_in++ != (xxh64sum & 0xff)) {
warnx("%s: invalid checksum", arg->input_str);
goto fail;
}
available_in--;
xxh64sum >>= 8;
}
break;
case 4:
case 5:
case 6:
crc32csum = ~calculate_crc32c(~0, output_buffer, next_out - output_buffer);
for (uint8_t i = 0; i < 1 << (check_type - 4); i++) {
if (!available_in) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
if (*next_in++ != (crc32csum & 0xff)) {
warnx("%s: invalid checksum", arg->input_str);
goto fail;
}
available_in--;
crc32csum >>= 8;
}
break;
case 7:
SHA256_Init(&sha256);
SHA256_Update(&sha256, output_buffer, next_out - output_buffer);
SHA256_Final(digest, &sha256);
if (available_in < 32) {
warnx("%s: incomplete block", arg->input_str);
goto fail;
}
if (memcmp(next_in, digest, 32)) {
warnx("%s: invalid checksum", arg->input_str);
goto fail;
}
available_in -= 32;
next_in += 32;
}
}
free(packet->data);
errno = pthread_mutex_lock(&arg->omutex);
if (errno)
err(1, NULL);
arg->datalen += packet->size;
packet->data = output_buffer;
packet->size = next_out - output_buffer;
if (packet->size > 0)
show_progress(packet->size);
if (arg->obuffer[packet->id % arg->slots])
errx(1, "internal error");
arg->obuffer[packet->id % arg->slots] = packet;
if (packet->id == arg->deliver_id) {
errno = pthread_cond_signal(&arg->oav_or_exit);
if (errno)
err(1, NULL);
}
errno = pthread_mutex_unlock(&arg->omutex);
if (errno)
err(1, NULL);
}
fail:
arg->error = true;
free(packet->data);
errno = pthread_mutex_lock(&arg->omutex);
if (errno)
err(1, NULL);
if (!--arg->working) {
errno = pthread_cond_signal(&arg->oav_or_exit);
if (errno)
err(1, NULL);
}
errno = pthread_mutex_unlock(&arg->omutex);
if (errno)
err(1, NULL);
return NULL;
}
static void *comp_muxer(courier_t arg) {
uint64_t offset = 1;
uint32_t i = 0, npackets;
packet_t packets[arg->slots];
fputs("\xce\xb2\xcf\x81", arg->out);
for (;;) {
npackets = 0;
errno = pthread_mutex_lock(&arg->omutex);
if (errno)
err(1, NULL);
packet_t *obuffer = &arg->obuffer[arg->deliver_id % arg->slots];
while (!*obuffer && arg->working > 0) {
errno = pthread_cond_wait(&arg->oav_or_exit, &arg->omutex);
if (errno)
err(1, NULL);
}
while (*obuffer) {
packets[npackets++] = *obuffer;
*obuffer = NULL;
obuffer = &arg->obuffer[++arg->deliver_id % arg->slots];
}
errno = pthread_mutex_unlock(&arg->omutex);
if (errno)
err(1, NULL);
if (!npackets) {
if (fputc(077, arg->out) < 0)
goto fail;
if (fputc((offset & 0x7f) | 0x80, arg->out) < 0)
goto fail;
while ((offset >>= 7) > 0x7f)
if (fputc(offset & 0x7f, arg->out) < 0)
goto fail;
if (fputc((offset & 0x7f) | 0x80, arg->out) < 0)
goto fail;
if (fputc((arg->datalen & 0x7f) | 0x80, arg->out) < 0)
goto fail;
while ((arg->datalen >>= 7) > 0x7f)
if (fputc(arg->datalen & 0x7f, arg->out) < 0)
goto fail;
if (fputc((arg->datalen & 0x7f) | 0x80, arg->out) < 0)
goto fail;
if (fputc(077, arg->out) < 0)
goto fail;
return NULL;
}
for (i = 0; i < npackets; i++) {
packet_t packet = packets[i];
uint8_t content_mask = arg->check_type | 010;
if (offset > 1)
content_mask |= 020;
if (packet->id == 0 && (arg->filename || arg->timestamp))
content_mask |= 0100;
if (fputc(((0x34cb00 >> ((content_mask ^ (content_mask >> 4)) & 0xf)) & 0x80) | content_mask, arg->out) < 0)
goto fail;
if (offset > 1) {
uint8_t i = 2;
while (offset > 0x7f) {
if (fputc(offset & 0x7f, arg->out) < 0)
goto fail;
offset >>= 7;
i++;
}
if (fputc((offset & 0x7f) | 0x80, arg->out) < 0)
goto fail;
offset = i;
}
offset += packet->size;
if (fwrite(packet->data, 1, packet->size, arg->out) != packet->size)
goto fail;
free(packet->data);
errno = pthread_mutex_lock(&arg->tmutex);
if (errno)
err(1, NULL);
if (++arg->free_slots == 1) {
errno = pthread_cond_signal(&arg->slot_av);
if (errno)
err(1, NULL);
}
errno = pthread_mutex_unlock(&arg->tmutex);
if (errno)
err(1, NULL);
}
}
fail:
warn("%s", arg->output_str);
arg->error = true;
while (i < npackets)
free(packets[i++]->data);
return NULL;
}
static void *decomp_muxer(courier_t arg) {
packet_t packets[arg->slots];
for (;;) {
uint32_t npackets = 0;
errno = pthread_mutex_lock(&arg->omutex);
if (errno)
err(1, NULL);
packet_t *obuffer = &arg->obuffer[arg->deliver_id % arg->slots];
while (!*obuffer && arg->working > 0) {
errno = pthread_cond_wait(&arg->oav_or_exit, &arg->omutex);
if (errno)
err(1, NULL);
}
while (*obuffer) {
packets[npackets++] = *obuffer;
*obuffer = NULL;
obuffer = &arg->obuffer[++arg->deliver_id % arg->slots];
}
errno = pthread_mutex_unlock(&arg->omutex);
if (errno)
err(1, NULL);
if (!npackets)
return NULL;
for (uint32_t i = 0; i < npackets; i++) {
packet_t packet = packets[i];
if (fwrite(packet->data, 1, packet->size, arg->out) != packet->size) {
warn("%s", arg->output_str);
arg->error = true;
while (i < npackets)
free(packets[i++]->data);
return NULL;
}
free(packet->data);
errno = pthread_mutex_lock(&arg->tmutex);
if (errno)
err(1, NULL);
if (++arg->free_slots == 1) {
errno = pthread_cond_signal(&arg->slot_av);
if (errno)
err(1, NULL);
}
errno = pthread_mutex_unlock(&arg->tmutex);
if (errno)
err(1, NULL);
}
}
}
static bool brzip_decompress1(const char *input_str, const char *output_str, FILE *in, FILE *out) {
XXH32_state_t *xxh32 = XXH32_createState();
XXH64_state_t *xxh64 = XXH64_createState();
XXH32_state_t *xxh32full = XXH32_createState();
XXH64_state_t *xxh64full = XXH64_createState();
if (!xxh32 || !xxh32full)
err(1, "XXH32_createState");
if (!xxh64 || !xxh64full)
err(1, "XXH64_createState");
XXH32_reset(xxh32full, 0);
XXH64_reset(xxh64full, 0);
uint32_t crc32cfull = ~calculate_crc32c(~0, NULL, 0);
size_t total_size = 0;
size_t input_buffer_length = 1 << 18;
size_t output_buffer_length = 1 << 18;
void *input_buffer = malloc(input_buffer_length);
uint8_t *output_buffer = malloc(output_buffer_length);
if (!input_buffer || !output_buffer)
err(1, "malloc");
uint64_t offset = 0;
const uint8_t *next_in = input_buffer;
size_t available_in = fread(input_buffer, 1, input_buffer_length, in);
if (!available_in) {
warnx("%s: unexpected end of file", input_str);
goto fail;
}
for (;;) {
SHA256_CTX sha256;
uint32_t crc32csum = ~calculate_crc32c(~0, NULL, 0);
uint64_t block_size = 0;
uint64_t old_offset = offset;
offset = 0;
if (0x34cb00 >> ((*next_in ^ (*next_in >> 4)) & 0xf) & 0x80) {
warnx("%s: corrupt input", input_str);
goto fail;
}
uint8_t content_mask = *next_in & 0x7f;
if ((content_mask & 0140) == 0140) {
warnx("%s: corrupt input", input_str);
goto fail;
}
offset++;
available_in--;
next_in++;
if (!available_in && content_mask != 047) {
next_in = input_buffer;
available_in = fread(input_buffer, 1, input_buffer_length, in);
if (!available_in) {
warnx("%s: unexpected end of file", input_str);
goto fail;
}
}
int check_type = content_mask & 7;
if (content_mask & 020) {
int64_t i = old_offset;
if (content_mask & 040) {
if ((*next_in & 0x80) == 0) {
warnx("%s: corrupt input", input_str);
goto fail;
}
if ((*next_in & 0x7f) != (i & 0x7f)) {
warnx("%s: invalid offset", input_str);
goto fail;
}
i >>= 7;
offset++;
available_in--;
next_in++;
}
do {
if (!available_in) {
next_in = input_buffer;
available_in = fread(input_buffer, 1, input_buffer_length, in);
if (!available_in) {
warnx("%s: unexpected end of file", input_str);
goto fail;
}
}
if ((*next_in & 0x7f) != (i & 0x7f)) {
warnx("%s: invalid offset", input_str);
goto fail;
}
i >>= 7;
offset++;
available_in--;
} while ((*next_in++ & 0x80) == 0);
if (i != 0) {
warnx("%s: invalid offset", input_str);
goto fail;
}
if (!available_in) {
next_in = input_buffer;
available_in = fread(input_buffer, 1, input_buffer_length, in);
if (!available_in) {
warnx("%s: unexpected end of file", input_str);
goto fail;
}
}
}
switch (check_type) {
case 0:
case 1:
case 2:
XXH32_reset(xxh32, 0);
break;
case 3:
XXH64_reset(xxh64, 0);
break;
case 7:
if (content_mask & 040)
break;
if (*next_in != 0) {
warnx("%s: unsupported checksum type", input_str);
goto fail;
}
offset++;
available_in--;
next_in++;
if (!available_in) {
next_in = input_buffer;
available_in = fread(input_buffer, 1, input_buffer_length, in);
if (!available_in) {
warnx("%s: unexpected end of file", input_str);
goto fail;
}
}
SHA256_Init(&sha256);
}
if (content_mask & 0100) {
if (0x34cb00 >> ((*next_in ^ (*next_in >> 4)) & 0xf) & 0x80) {
warnx("%s: corrupt input", input_str);
goto fail;
}