mirror of https://github.com/vasi/pixz
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
493 lines
14 KiB
C
493 lines
14 KiB
C
#include "pixz.h"
|
|
|
|
#include <archive.h>
|
|
#include <archive_entry.h>
|
|
|
|
|
|
#pragma mark TYPES
|
|
|
|
typedef enum {
|
|
MSG_BLOCK,
|
|
MSG_STOP,
|
|
} msg_type_t;
|
|
|
|
typedef struct io_block_t io_block_t;
|
|
struct io_block_t {
|
|
size_t seq;
|
|
io_block_t *next;
|
|
|
|
lzma_block block;
|
|
uint8_t *input, *output;
|
|
size_t insize, outsize;
|
|
};
|
|
|
|
|
|
#pragma mark GLOBALS
|
|
|
|
#define DEBUG 0
|
|
|
|
static size_t gNumEncodeThreads = 0;
|
|
static pthread_t *gEncodeThreads = NULL;
|
|
static pthread_t gReadThread;
|
|
static queue_t *gReadQ, *gEncodeQ, *gWriteQ;
|
|
static size_t gBlockInSize = 0, gBlockOutSize = 0;
|
|
|
|
static off_t gMultiHeaderStart = 0;
|
|
static bool gMultiHeader = false;
|
|
static off_t gTotalRead = 0;
|
|
static size_t gBlockNum = 0;
|
|
static io_block_t *gReadBlock = NULL;
|
|
|
|
static lzma_filter gFilters[LZMA_FILTERS_MAX + 1];
|
|
|
|
static FILE *gOutFile = NULL;
|
|
static uint8_t gFileIndexBuf[CHUNKSIZE];
|
|
static size_t gFileIndexBufPos = 0;
|
|
|
|
|
|
#pragma mark FUNCTION DECLARATIONS
|
|
|
|
#if DEBUG
|
|
#define debug(str, ...) fprintf(stderr, str "\n", ##__VA_ARGS__)
|
|
#else
|
|
#define debug(...)
|
|
#endif
|
|
|
|
static void *read_thread(void *data);
|
|
static void *encode_thread(void *data);
|
|
static void block_queue_free(int type, void *p);
|
|
|
|
static bool is_multi_header(const char *name);
|
|
static void add_file(off_t offset, const char *name);
|
|
|
|
static archive_read_callback tar_read;
|
|
static archive_open_callback tar_ok;
|
|
static archive_close_callback tar_ok;
|
|
|
|
static void block_init(lzma_block *block);
|
|
static void stream_edge(lzma_vli backward_size);
|
|
static void write_blocks(size_t *seq, io_block_t **ibs, io_block_t *ib);
|
|
static void write_block(io_block_t *ib);
|
|
static void encode_index(void);
|
|
|
|
static void write_file_index(void);
|
|
static void write_file_index_bytes(size_t size, uint8_t *buf);
|
|
static void write_file_index_buf(lzma_action action);
|
|
|
|
|
|
#pragma mark FUNCTION DEFINITIONS
|
|
|
|
int main(int argc, char **argv) {
|
|
debug("launch");
|
|
if (argc != 3)
|
|
die("Need two arguments");
|
|
if (!(gInFile = fopen(argv[1], "r")))
|
|
die("Can't open input file");
|
|
if (!(gOutFile = fopen(argv[2], "w")))
|
|
die("Can't open output file");
|
|
|
|
// xz options
|
|
lzma_options_lzma lzma_opts;
|
|
if (lzma_lzma_preset(&lzma_opts, LZMA_PRESET_DEFAULT))
|
|
die("Error setting lzma options");
|
|
gFilters[0] = (lzma_filter){ .id = LZMA_FILTER_LZMA2,
|
|
.options = &lzma_opts };
|
|
gFilters[1] = (lzma_filter){ .id = LZMA_VLI_UNKNOWN, .options = NULL };
|
|
|
|
gBlockInSize = lzma_opts.dict_size * 1.0;
|
|
gBlockOutSize = lzma_block_buffer_bound(gBlockInSize);
|
|
|
|
// thread setup
|
|
gNumEncodeThreads = num_threads();
|
|
gEncodeThreads = malloc(gNumEncodeThreads * sizeof(pthread_t));
|
|
gReadQ = queue_new(block_queue_free);
|
|
gEncodeQ = queue_new(block_queue_free);
|
|
gWriteQ = queue_new(block_queue_free);
|
|
for (size_t i = 0; i < (int)(gNumEncodeThreads * 2 + 4); ++i) {
|
|
// create blocks, including a margin of error
|
|
io_block_t *ib = malloc(sizeof(io_block_t));
|
|
ib->input = malloc(gBlockInSize);
|
|
ib->output = malloc(gBlockOutSize);
|
|
queue_push(gReadQ, MSG_BLOCK, ib);
|
|
}
|
|
if (pthread_create(&gReadThread, NULL, &read_thread, NULL))
|
|
die("Error creating read thread");
|
|
for (int i = 0; i < gNumEncodeThreads; ++i) {
|
|
if (pthread_create(&gEncodeThreads[i], NULL, &encode_thread, (void*)(uintptr_t)i))
|
|
die("Error creating encode thread");
|
|
}
|
|
debug("writer: start");
|
|
|
|
// pre-block setup: header, index
|
|
if (!(gIndex = lzma_index_init(NULL)))
|
|
die("Error creating index");
|
|
stream_edge(LZMA_VLI_UNKNOWN);
|
|
|
|
// write blocks
|
|
size_t seq = 0;
|
|
io_block_t *ibs = NULL;
|
|
while (true) {
|
|
io_block_t *ib;
|
|
int msg = queue_pop(gWriteQ, (void**)&ib);
|
|
if (msg == MSG_STOP)
|
|
break;
|
|
|
|
debug("writer: received %zu", ib->seq);
|
|
write_blocks(&seq, &ibs, ib);
|
|
}
|
|
|
|
// file index
|
|
write_file_index();
|
|
free_file_index();
|
|
|
|
// post-block cleanup: index, footer
|
|
encode_index();
|
|
stream_edge(lzma_index_size(gIndex));
|
|
lzma_index_end(gIndex, NULL);
|
|
fclose(gOutFile);
|
|
|
|
// thread cleanup
|
|
debug("writer: cleaning up reader");
|
|
if (pthread_join(gReadThread, NULL))
|
|
die("Error joining read thread");
|
|
queue_free(gEncodeQ);
|
|
queue_free(gWriteQ);
|
|
queue_free(gReadQ);
|
|
free(gEncodeThreads);
|
|
|
|
debug("exit");
|
|
return 0;
|
|
}
|
|
|
|
|
|
#pragma mark READING
|
|
|
|
static void *read_thread(void *data) {
|
|
debug("reader: start");
|
|
|
|
struct archive *ar = archive_read_new();
|
|
archive_read_support_compression_none(ar);
|
|
archive_read_support_format_tar(ar);
|
|
archive_read_open(ar, NULL, tar_ok, tar_read, tar_ok);
|
|
struct archive_entry *entry;
|
|
while (true) {
|
|
int aerr = archive_read_next_header(ar, &entry);
|
|
if (aerr == ARCHIVE_EOF) {
|
|
// TODO
|
|
break;
|
|
} else if (aerr != ARCHIVE_OK && aerr != ARCHIVE_WARN) {
|
|
// Some charset translations warn spuriously
|
|
fprintf(stderr, "%s\n", archive_error_string(ar));
|
|
die("Error reading archive entry");
|
|
}
|
|
|
|
add_file(archive_read_header_position(ar),
|
|
archive_entry_pathname(entry));
|
|
}
|
|
archive_read_finish(ar);
|
|
fclose(gInFile);
|
|
add_file(gTotalRead, NULL);
|
|
|
|
// write last block, if necessary
|
|
if (gReadBlock) {
|
|
// if this block had only one read, and it was EOF, it's waste
|
|
debug("reader: handling last block %zu", gReadBlock->seq);
|
|
queue_push(gReadBlock->insize ? gEncodeQ : gReadQ, MSG_BLOCK, gReadBlock);
|
|
gReadBlock = NULL;
|
|
}
|
|
|
|
// stop the other threads
|
|
debug("reader: cleaning up encoders");
|
|
for (int i = 0; i < gNumEncodeThreads; ++i) {
|
|
queue_push(gEncodeQ, MSG_STOP, NULL);
|
|
}
|
|
for (int i = 0; i < gNumEncodeThreads; ++i) {
|
|
if (pthread_join(gEncodeThreads[i], NULL))
|
|
die("Error joining encode thread");
|
|
}
|
|
queue_push(gWriteQ, MSG_STOP, NULL);
|
|
|
|
debug("reader: end");
|
|
return NULL;
|
|
}
|
|
|
|
static ssize_t tar_read(struct archive *ar, void *ref, const void **bufp) {
|
|
if (!gReadBlock) {
|
|
queue_pop(gReadQ, (void**)&gReadBlock);
|
|
gReadBlock->insize = 0;
|
|
gReadBlock->seq = gBlockNum++;
|
|
debug("reader: reading %zu", gReadBlock->seq);
|
|
}
|
|
|
|
size_t space = gBlockInSize - gReadBlock->insize;
|
|
if (space > CHUNKSIZE)
|
|
space = CHUNKSIZE;
|
|
uint8_t *buf = gReadBlock->input + gReadBlock->insize;
|
|
size_t rd = fread(buf, 1, space, gInFile);
|
|
if (ferror(gInFile))
|
|
die("Error reading input file");
|
|
gReadBlock->insize += rd;
|
|
gTotalRead += rd;
|
|
*bufp = buf;
|
|
|
|
if (gReadBlock->insize == gBlockInSize) {
|
|
debug("reader: sending %zu", gReadBlock->seq);
|
|
queue_push(gEncodeQ, MSG_BLOCK, gReadBlock);
|
|
gReadBlock = NULL;
|
|
}
|
|
|
|
return rd;
|
|
}
|
|
|
|
static int tar_ok(struct archive *ar, void *ref) {
|
|
return ARCHIVE_OK;
|
|
}
|
|
|
|
static bool is_multi_header(const char *name) {
|
|
size_t i = strlen(name);
|
|
while (i != 0 && name[i - 1] != '/')
|
|
--i;
|
|
|
|
return strncmp(name + i, "._", 2) == 0;
|
|
}
|
|
|
|
static void add_file(off_t offset, const char *name) {
|
|
if (name && is_multi_header(name)) {
|
|
if (!gMultiHeader)
|
|
gMultiHeaderStart = offset;
|
|
gMultiHeader = true;
|
|
return;
|
|
}
|
|
|
|
file_index_t *f = malloc(sizeof(file_index_t));
|
|
f->offset = gMultiHeader ? gMultiHeaderStart : offset;
|
|
gMultiHeader = false;
|
|
f->name = name ? xstrdup(name) : NULL;
|
|
f->next = NULL;
|
|
|
|
if (gLastFile) {
|
|
gLastFile->next = f;
|
|
} else { // new index
|
|
gFileIndex = f;
|
|
}
|
|
gLastFile = f;
|
|
}
|
|
|
|
static void block_queue_free(int type, void *p) {
|
|
switch (type) {
|
|
case MSG_BLOCK: {
|
|
io_block_t *ib = (io_block_t*)p;
|
|
free(ib->input);
|
|
free(ib->output);
|
|
free(ib);
|
|
break;
|
|
}
|
|
case MSG_STOP:
|
|
break;
|
|
default:
|
|
die("Unknown msg type %d", type);
|
|
}
|
|
}
|
|
|
|
|
|
#pragma mark ENCODING
|
|
|
|
static void *encode_thread(void *arg) {
|
|
int __attribute__((unused)) thnum = (uintptr_t)arg;
|
|
lzma_stream stream = LZMA_STREAM_INIT;
|
|
|
|
while (true) {
|
|
io_block_t *ib;
|
|
int msg = queue_pop(gEncodeQ, (void**)&ib);
|
|
if (msg == MSG_STOP)
|
|
break;
|
|
|
|
debug("encoder %d: received %zu", thnum, ib->seq);
|
|
|
|
block_init(&ib->block);
|
|
if (lzma_block_header_encode(&ib->block, ib->output) != LZMA_OK)
|
|
die("Error encoding block header");
|
|
ib->outsize = ib->block.header_size;
|
|
|
|
if (lzma_block_encoder(&stream, &ib->block) != LZMA_OK)
|
|
die("Error creating block encoder");
|
|
stream.next_in = ib->input;
|
|
stream.avail_in = ib->insize;
|
|
stream.next_out = ib->output + ib->outsize;
|
|
stream.avail_out = gBlockOutSize - ib->outsize;
|
|
|
|
lzma_ret err = LZMA_OK;
|
|
while (err != LZMA_STREAM_END) {
|
|
err = lzma_code(&stream, LZMA_FINISH);
|
|
if (err != LZMA_OK && err != LZMA_STREAM_END)
|
|
die("Error encoding block");
|
|
}
|
|
ib->outsize = stream.next_out - ib->output;
|
|
|
|
debug("encoder %d: sending %zu", thnum, ib->seq);
|
|
queue_push(gWriteQ, MSG_BLOCK, ib);
|
|
}
|
|
|
|
lzma_end(&stream);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#pragma mark WRITING
|
|
|
|
static void block_init(lzma_block *block) {
|
|
block->version = 0;
|
|
block->check = CHECK;
|
|
block->filters = gFilters;
|
|
block->compressed_size = block->uncompressed_size = LZMA_VLI_UNKNOWN;
|
|
|
|
if (lzma_block_header_size(block) != LZMA_OK)
|
|
die("Error getting block header size");
|
|
}
|
|
|
|
static void stream_edge(lzma_vli backward_size) {
|
|
lzma_stream_flags flags = { .version = 0, .check = CHECK,
|
|
.backward_size = backward_size };
|
|
uint8_t buf[LZMA_STREAM_HEADER_SIZE];
|
|
|
|
lzma_ret (*encoder)(const lzma_stream_flags *flags, uint8_t *buf);
|
|
encoder = backward_size == LZMA_VLI_UNKNOWN
|
|
? &lzma_stream_header_encode
|
|
: &lzma_stream_footer_encode;
|
|
if ((*encoder)(&flags, buf) != LZMA_OK)
|
|
die("Error encoding stream edge");
|
|
|
|
if (fwrite(buf, LZMA_STREAM_HEADER_SIZE, 1, gOutFile) != 1)
|
|
die("Error writing stream edge");
|
|
}
|
|
|
|
static void write_block(io_block_t *ib) {
|
|
debug("writer: writing %zu", ib->seq);
|
|
|
|
// Does it make sense to chunk this?
|
|
size_t written = 0;
|
|
while (ib->outsize > written) {
|
|
size_t size = ib->outsize - written;
|
|
if (size > CHUNKSIZE)
|
|
size = CHUNKSIZE;
|
|
if (fwrite(ib->output + written, size, 1, gOutFile) != 1)
|
|
die("Error writing block data");
|
|
written += size;
|
|
}
|
|
|
|
if (lzma_index_append(gIndex, NULL,
|
|
lzma_block_unpadded_size(&ib->block),
|
|
ib->block.uncompressed_size) != LZMA_OK)
|
|
die("Error adding to index");
|
|
|
|
debug("writer: writing %zu complete", ib->seq);
|
|
}
|
|
|
|
static void write_blocks(size_t *seq, io_block_t **ibs, io_block_t *ib) {
|
|
// insert it into the queue, in order
|
|
io_block_t **prev = ibs, *post = *ibs;
|
|
while (post && post->seq < ib->seq) {
|
|
prev = &post->next;
|
|
post = post->next;
|
|
}
|
|
ib->next = post;
|
|
*prev = ib;
|
|
|
|
// write the blocks that we can
|
|
io_block_t *cur = *ibs;
|
|
while (cur && cur->seq == *seq) {
|
|
write_block(cur);
|
|
queue_push(gReadQ, MSG_BLOCK, cur);
|
|
++*seq;
|
|
cur = cur->next;
|
|
}
|
|
*ibs = cur;
|
|
}
|
|
|
|
static void encode_index(void) {
|
|
if (lzma_index_encoder(&gStream, gIndex) != LZMA_OK)
|
|
die("Error creating index encoder");
|
|
uint8_t obuf[CHUNKSIZE];
|
|
lzma_ret err = LZMA_OK;
|
|
while (err != LZMA_STREAM_END) {
|
|
gStream.next_out = obuf;
|
|
gStream.avail_out = CHUNKSIZE;
|
|
err = lzma_code(&gStream, LZMA_RUN);
|
|
if (err != LZMA_OK && err != LZMA_STREAM_END)
|
|
die("Error encoding index");
|
|
if (gStream.avail_out != CHUNKSIZE) {
|
|
if (fwrite(obuf, CHUNKSIZE - gStream.avail_out, 1, gOutFile) != 1)
|
|
die("Error writing index data");
|
|
}
|
|
}
|
|
lzma_end(&gStream);
|
|
}
|
|
|
|
static void write_file_index(void) {
|
|
lzma_block block;
|
|
block_init(&block);
|
|
uint8_t hdrbuf[block.header_size];
|
|
if (lzma_block_header_encode(&block, hdrbuf) != LZMA_OK)
|
|
die("Error encoding file index header");
|
|
if (fwrite(hdrbuf, block.header_size, 1, gOutFile) != 1)
|
|
die("Error writing file index header");
|
|
|
|
if (lzma_block_encoder(&gStream, &block) != LZMA_OK)
|
|
die("Error creating file index encoder");
|
|
|
|
uint8_t offbuf[sizeof(uint64_t)];
|
|
xle64enc(offbuf, PIXZ_INDEX_MAGIC);
|
|
write_file_index_bytes(sizeof(offbuf), offbuf);
|
|
for (file_index_t *f = gFileIndex; f != NULL; f = f->next) {
|
|
char *name = f->name ? f->name : "";
|
|
size_t len = strlen(name);
|
|
write_file_index_bytes(len + 1, (uint8_t*)name);
|
|
xle64enc(offbuf, f->offset);
|
|
write_file_index_bytes(sizeof(offbuf), offbuf);
|
|
}
|
|
write_file_index_buf(LZMA_FINISH);
|
|
|
|
if (lzma_index_append(gIndex, NULL, lzma_block_unpadded_size(&block),
|
|
block.uncompressed_size) != LZMA_OK)
|
|
die("Error adding file-index to index");
|
|
lzma_end(&gStream);
|
|
}
|
|
|
|
static void write_file_index_bytes(size_t size, uint8_t *buf) {
|
|
size_t bufpos = 0;
|
|
while (bufpos < size) {
|
|
size_t len = size - bufpos;
|
|
size_t space = CHUNKSIZE - gFileIndexBufPos;
|
|
if (len > space)
|
|
len = space;
|
|
memcpy(gFileIndexBuf + gFileIndexBufPos, buf + bufpos, len);
|
|
gFileIndexBufPos += len;
|
|
bufpos += len;
|
|
|
|
if (gFileIndexBufPos == CHUNKSIZE) {
|
|
write_file_index_buf(LZMA_RUN);
|
|
gFileIndexBufPos = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void write_file_index_buf(lzma_action action) {
|
|
uint8_t obuf[CHUNKSIZE];
|
|
gStream.avail_in = gFileIndexBufPos;
|
|
gStream.next_in = gFileIndexBuf;
|
|
lzma_ret err = LZMA_OK;
|
|
while (err != LZMA_STREAM_END && (action == LZMA_FINISH || gStream.avail_in)) {
|
|
gStream.avail_out = CHUNKSIZE;
|
|
gStream.next_out = obuf;
|
|
err = lzma_code(&gStream, action);
|
|
if (err != LZMA_OK && err != LZMA_STREAM_END)
|
|
die("Error encoding file index");
|
|
if (gStream.avail_out != CHUNKSIZE) {
|
|
if (fwrite(obuf, CHUNKSIZE - gStream.avail_out, 1, gOutFile) != 1)
|
|
die("Error writing file index");
|
|
}
|
|
}
|
|
|
|
gFileIndexBufPos = 0;
|
|
}
|