dmg.c (32cc71def9e3885f9527af713e6d8dc7521ddc08) dmg.c (353a5d84b25c335b259f37c4f43dad96e6d60ba8)
1/*
2 * QEMU Block driver for DMG images
3 *
4 * Copyright (c) 2004 Johannes E. Schindelin
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

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385 if (info_length == 0 || info_length > 16 * 1024 * 1024) {
386 ret = -EINVAL;
387 goto fail;
388 }
389
390 buffer = g_malloc(info_length + 1);
391 buffer[info_length] = '\0';
392 ret = bdrv_pread(bs->file, info_begin, info_length, buffer, 0);
1/*
2 * QEMU Block driver for DMG images
3 *
4 * Copyright (c) 2004 Johannes E. Schindelin
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights

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385 if (info_length == 0 || info_length > 16 * 1024 * 1024) {
386 ret = -EINVAL;
387 goto fail;
388 }
389
390 buffer = g_malloc(info_length + 1);
391 buffer[info_length] = '\0';
392 ret = bdrv_pread(bs->file, info_begin, info_length, buffer, 0);
393 if (ret != info_length) {
393 if (ret < 0) {
394 ret = -EINVAL;
395 goto fail;
396 }
397
398 /* look for <data>...</data>. The data is 284 (0x11c) bytes after base64
399 * decode. The actual data element has 431 (0x1af) bytes which includes tabs
400 * and line feeds. */
401 data_end = (char *)buffer;

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606
607 s->current_chunk = s->n_chunks;
608 switch (s->types[chunk]) { /* block entry type */
609 case UDZO: { /* zlib compressed */
610 /* we need to buffer, because only the chunk as whole can be
611 * inflated. */
612 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
613 s->compressed_chunk, 0);
394 ret = -EINVAL;
395 goto fail;
396 }
397
398 /* look for <data>...</data>. The data is 284 (0x11c) bytes after base64
399 * decode. The actual data element has 431 (0x1af) bytes which includes tabs
400 * and line feeds. */
401 data_end = (char *)buffer;

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606
607 s->current_chunk = s->n_chunks;
608 switch (s->types[chunk]) { /* block entry type */
609 case UDZO: { /* zlib compressed */
610 /* we need to buffer, because only the chunk as whole can be
611 * inflated. */
612 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
613 s->compressed_chunk, 0);
614 if (ret != s->lengths[chunk]) {
614 if (ret < 0) {
615 return -1;
616 }
617
618 s->zstream.next_in = s->compressed_chunk;
619 s->zstream.avail_in = s->lengths[chunk];
620 s->zstream.next_out = s->uncompressed_chunk;
621 s->zstream.avail_out = 512 * s->sectorcounts[chunk];
622 ret = inflateReset(&s->zstream);

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632 case UDBZ: /* bzip2 compressed */
633 if (!dmg_uncompress_bz2) {
634 break;
635 }
636 /* we need to buffer, because only the chunk as whole can be
637 * inflated. */
638 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
639 s->compressed_chunk, 0);
615 return -1;
616 }
617
618 s->zstream.next_in = s->compressed_chunk;
619 s->zstream.avail_in = s->lengths[chunk];
620 s->zstream.next_out = s->uncompressed_chunk;
621 s->zstream.avail_out = 512 * s->sectorcounts[chunk];
622 ret = inflateReset(&s->zstream);

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632 case UDBZ: /* bzip2 compressed */
633 if (!dmg_uncompress_bz2) {
634 break;
635 }
636 /* we need to buffer, because only the chunk as whole can be
637 * inflated. */
638 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
639 s->compressed_chunk, 0);
640 if (ret != s->lengths[chunk]) {
640 if (ret < 0) {
641 return -1;
642 }
643
644 ret = dmg_uncompress_bz2((char *)s->compressed_chunk,
645 (unsigned int) s->lengths[chunk],
646 (char *)s->uncompressed_chunk,
647 (unsigned int)
648 (512 * s->sectorcounts[chunk]));

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653 case ULFO:
654 if (!dmg_uncompress_lzfse) {
655 break;
656 }
657 /* we need to buffer, because only the chunk as whole can be
658 * inflated. */
659 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
660 s->compressed_chunk, 0);
641 return -1;
642 }
643
644 ret = dmg_uncompress_bz2((char *)s->compressed_chunk,
645 (unsigned int) s->lengths[chunk],
646 (char *)s->uncompressed_chunk,
647 (unsigned int)
648 (512 * s->sectorcounts[chunk]));

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653 case ULFO:
654 if (!dmg_uncompress_lzfse) {
655 break;
656 }
657 /* we need to buffer, because only the chunk as whole can be
658 * inflated. */
659 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
660 s->compressed_chunk, 0);
661 if (ret != s->lengths[chunk]) {
661 if (ret < 0) {
662 return -1;
663 }
664
665 ret = dmg_uncompress_lzfse((char *)s->compressed_chunk,
666 (unsigned int) s->lengths[chunk],
667 (char *)s->uncompressed_chunk,
668 (unsigned int)
669 (512 * s->sectorcounts[chunk]));
670 if (ret < 0) {
671 return ret;
672 }
673 break;
674 case UDRW: /* copy */
675 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
676 s->uncompressed_chunk, 0);
662 return -1;
663 }
664
665 ret = dmg_uncompress_lzfse((char *)s->compressed_chunk,
666 (unsigned int) s->lengths[chunk],
667 (char *)s->uncompressed_chunk,
668 (unsigned int)
669 (512 * s->sectorcounts[chunk]));
670 if (ret < 0) {
671 return ret;
672 }
673 break;
674 case UDRW: /* copy */
675 ret = bdrv_pread(bs->file, s->offsets[chunk], s->lengths[chunk],
676 s->uncompressed_chunk, 0);
677 if (ret != s->lengths[chunk]) {
677 if (ret < 0) {
678 return -1;
679 }
680 break;
681 case UDZE: /* zeros */
682 case UDIG: /* ignore */
683 /* see dmg_read, it is treated specially. No buffer needs to be
684 * pre-filled, the zeroes can be set directly. */
685 break;

--- 80 unchanged lines hidden --- 		678 return -1;
679 }
680 break;
681 case UDZE: /* zeros */
682 case UDIG: /* ignore */
683 /* see dmg_read, it is treated specially. No buffer needs to be
684 * pre-filled, the zeroes can be set directly. */
685 break;

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