| /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */ |
| |
| /* |
| * Copyright (C) 2014 Rob Clark <robclark@freedesktop.org> |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice (including the next |
| * paragraph) shall be included in all copies or substantial portions of the |
| * Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| * |
| * Authors: |
| * Rob Clark <robclark@freedesktop.org> |
| */ |
| |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <fcntl.h> |
| #include <archive.h> |
| #include <archive_entry.h> |
| |
| #include "io.h" |
| |
| struct io { |
| struct archive *a; |
| struct archive_entry *entry; |
| unsigned offset; |
| }; |
| |
| static void io_error(struct io *io) |
| { |
| fprintf(stderr, "%s\n", archive_error_string(io->a)); |
| io_close(io); |
| } |
| |
| static struct io * io_new(void) |
| { |
| struct io *io = calloc(1, sizeof(*io)); |
| int ret; |
| |
| if (!io) |
| return NULL; |
| |
| io->a = archive_read_new(); |
| ret = archive_read_support_filter_gzip(io->a); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| ret = archive_read_support_filter_none(io->a); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| ret = archive_read_support_format_all(io->a); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| ret = archive_read_support_format_raw(io->a); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| return io; |
| } |
| |
| struct io * io_open(const char *filename) |
| { |
| struct io *io = io_new(); |
| int ret; |
| |
| if (!io) |
| return NULL; |
| |
| ret = archive_read_open_filename(io->a, filename, 10240); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| ret = archive_read_next_header(io->a, &io->entry); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| return io; |
| } |
| |
| struct io * io_openfd(int fd) |
| { |
| struct io *io = io_new(); |
| int ret; |
| |
| if (!io) |
| return NULL; |
| |
| ret = archive_read_open_fd(io->a, fd, 10240); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| ret = archive_read_next_header(io->a, &io->entry); |
| if (ret != ARCHIVE_OK) { |
| io_error(io); |
| return NULL; |
| } |
| |
| return io; |
| } |
| |
| void io_close(struct io *io) |
| { |
| archive_read_free(io->a); |
| free(io); |
| } |
| |
| unsigned io_offset(struct io *io) |
| { |
| return io->offset; |
| } |
| |
| #include <assert.h> |
| int io_readn(struct io *io, void *buf, int nbytes) |
| { |
| char *ptr = buf; |
| int ret = 0; |
| while (nbytes > 0) { |
| int n = archive_read_data(io->a, ptr, nbytes); |
| if (n < 0) { |
| fprintf(stderr, "%s\n", archive_error_string(io->a)); |
| return n; |
| } |
| if (n == 0) |
| break; |
| ptr += n; |
| nbytes -= n; |
| ret += n; |
| io->offset += n; |
| } |
| return ret; |
| } |