void pixz_read(bool verify, size_t nspecs, char **specs) {
decode_index();
if (verify)
gFileIndexOffset = read_file_index(0);
wanted_files(nspecs, specs);
set_block_sizes();
#if DEBUG
for (wanted_t *w = gWantedFiles; w; w = w->next)
debug("want: %s", w->name);
#endif
pipeline_create(block_create, block_free, read_thread, decode_thread);
if (verify && gFileIndexOffset) {
gArWanted = gWantedFiles;
wanted_t *w = gWantedFiles, *wlast = NULL;
bool lastmulti = false;
off_t lastoff = 0;
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) {
break;
} else if (aerr != ARCHIVE_OK && aerr != ARCHIVE_WARN) {
fprintf(stderr, "%s\n", archive_error_string(ar));
die("Error reading archive entry");
}
off_t off = archive_read_header_position(ar);
const char *path = archive_entry_pathname(entry);
if (!lastmulti) {
if (wlast && wlast->size != off - lastoff)
die("Index and archive show differing sizes for %s: %d vs %d",
wlast->name, wlast->size, off - lastoff);
lastoff = off;
}
lastmulti = is_multi_header(path);
if (lastmulti)
continue;
if (!w)
die("File %s missing in index", path);
if (strcmp(path, w->name) != 0)
die("Index and archive differ as to next file: %s vs %s",
w->name, path);
wlast = w;
w = w->next;
}
if (w && w->name)
die("File %s missing in archive", w->name);
tar_write_last(); // write whatever's left
} else {
pipeline_item_t *pi;
while ((pi = pipeline_merged())) {
io_block_t *ib = (io_block_t*)(pi->data);
fwrite(ib->output, ib->outsize, 1, gOutFile);
queue_push(gPipelineStartQ, PIPELINE_ITEM, pi);
}
}
pipeline_destroy();
wanted_free(gWantedFiles);
}
void pixz_read(bool verify, size_t nspecs, char **specs) {
if (decode_index()) {
if (verify)
gFileIndexOffset = read_file_index();
wanted_files(nspecs, specs);
gExplicitFiles = nspecs;
}
#if DEBUG
for (wanted_t *w = gWantedFiles; w; w = w->next)
debug("want: %s", w->name);
#endif
pipeline_create(block_create, block_free,
gIndex ? read_thread : read_thread_noindex, decode_thread);
if (verify && gFileIndexOffset) {
gArWanted = gWantedFiles;
wanted_t *w = gWantedFiles, *wlast = NULL;
bool lastmulti = false;
off_t lastoff = 0;
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) {
break;
} else if (aerr != ARCHIVE_OK && aerr != ARCHIVE_WARN) {
fprintf(stderr, "%s\n", archive_error_string(ar));
die("Error reading archive entry");
}
off_t off = archive_read_header_position(ar);
const char *path = archive_entry_pathname(entry);
if (!lastmulti) {
if (wlast && wlast->size != off - lastoff)
die("Index and archive show differing sizes for %s: %d vs %d",
wlast->name, wlast->size, off - lastoff);
lastoff = off;
}
lastmulti = is_multi_header(path);
if (lastmulti)
continue;
if (!w)
die("File %s missing in index", path);
if (strcmp(path, w->name) != 0)
die("Index and archive differ as to next file: %s vs %s",
w->name, path);
wlast = w;
w = w->next;
}
archive_read_finish(ar);
if (w && w->name)
die("File %s missing in archive", w->name);
tar_write_last(); // write whatever's left
}
if (!gExplicitFiles) {
/* Heuristics for detecting pixz file index:
* - Input must be streaming (otherwise read_thread does this)
* - Data must look tar-like
* - Must have all sized blocks, followed by unsized file index */
bool start = !gIndex && verify,
tar = false, all_sized = true, skipping = false;
pipeline_item_t *pi;
while ((pi = pipeline_merged())) {
io_block_t *ib = (io_block_t*)(pi->data);
if (skipping && ib->btype != BLOCK_CONTINUATION) {
fprintf(stderr,
"Warning: File index heuristic failed, use -t flag.\n");
skipping = false;
}
if (!skipping && tar && !start && all_sized
&& ib->btype == BLOCK_UNSIZED && taste_file_index(ib))
skipping = true;
if (start) {
tar = taste_tar(ib);
start = false;
}
if (ib->btype == BLOCK_UNSIZED)
all_sized = false;
if (!skipping)
fwrite(ib->output, ib->outsize, 1, gOutFile);
queue_push(gPipelineStartQ, PIPELINE_ITEM, pi);
}
}
pipeline_destroy();
wanted_free(gWantedFiles);
}
