mirror of
https://github.com/vasi/pixz
synced 2024-11-12 13:10:43 +00:00
97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
#include "pixz.h"
|
|
|
|
#include <archive.h>
|
|
#include <archive_entry.h>
|
|
|
|
#include <sys/errno.h>
|
|
|
|
#define CHUNKSIZE 4096
|
|
|
|
typedef struct {
|
|
FILE *file;
|
|
uint8_t buf[CHUNKSIZE];
|
|
} pixz_tar;
|
|
|
|
static int pixz_tar_open(struct archive *a, void *refp);
|
|
static int pixz_tar_close(struct archive *a, void *refp);
|
|
static ssize_t pixz_tar_read(struct archive *a, void *refp, const void **buf);
|
|
|
|
#include <string.h>
|
|
|
|
int main(void) {
|
|
pixz_index *index = pixz_index_new();
|
|
|
|
struct archive *a = archive_read_new();
|
|
archive_read_support_compression_none(a);
|
|
archive_read_support_format_tar(a);
|
|
|
|
FILE *infile = stdin;
|
|
pixz_tar input = { .file = infile };
|
|
if (archive_read_open(a, &input, pixz_tar_open, pixz_tar_read,
|
|
pixz_tar_close) != ARCHIVE_OK)
|
|
pixz_die("Can't open archive\n");
|
|
|
|
while (1) {
|
|
struct archive_entry *entry;
|
|
int aerr = archive_read_next_header(a, &entry);
|
|
if (aerr == ARCHIVE_EOF) {
|
|
pixz_index_finish(index, ftello(stdin));
|
|
break;
|
|
} else if (aerr != ARCHIVE_OK && aerr != ARCHIVE_WARN) {
|
|
// libarchive warns for silly things like failure to convert
|
|
// names into multibyte strings
|
|
pixz_die("Error reading header: %s\n", archive_error_string(a));
|
|
}
|
|
|
|
const char *name = archive_entry_pathname(entry);
|
|
size_t offset = archive_read_header_position(a);
|
|
pixz_index_add(index, offset, name);
|
|
|
|
if (archive_read_data_skip(a) != ARCHIVE_OK)
|
|
pixz_die("Error skipping data\n");
|
|
}
|
|
if (archive_read_finish(a) != ARCHIVE_OK)
|
|
pixz_die("Error finishing read\n");
|
|
|
|
FILE *ifile = fopen(INDEXFILE, "w+");
|
|
if (!ifile)
|
|
pixz_die("Can't open index file\n");
|
|
pixz_encode_options *opts = pixz_encode_options_new();
|
|
pixz_encode_options_default(opts);
|
|
pixz_index_write(index, ifile, opts);
|
|
pixz_index_free(index);
|
|
lzma_check check = opts->check;
|
|
pixz_encode_options_free(opts);
|
|
|
|
fseek(ifile, 0, SEEK_SET);
|
|
pixz_index *i2;
|
|
pixz_index_read_in_place(&i2, ifile, check);
|
|
fclose(ifile);
|
|
|
|
pixz_index_dump(i2, stdout);
|
|
pixz_index_free(i2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int pixz_tar_open(struct archive *a, void *refp) {
|
|
return ARCHIVE_OK;
|
|
}
|
|
|
|
static int pixz_tar_close(struct archive *a, void *refp) {
|
|
fclose(((pixz_tar*)refp)->file);
|
|
return ARCHIVE_OK;
|
|
}
|
|
|
|
static ssize_t pixz_tar_read(struct archive *a, void *refp, const void **buf) {
|
|
pixz_tar *input = (pixz_tar*)refp;
|
|
size_t rd = fread(input->buf, 1, CHUNKSIZE, input->file);
|
|
if (ferror(input->file)) {
|
|
archive_set_error(a, errno, "Read error");
|
|
return -1;
|
|
}
|
|
*buf = input->buf;
|
|
return rd;
|
|
}
|