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MiniVHD: Fix multi sector writes. Patch from sards3.

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This commit is contained in:
SarahW 2020-11-21 20:57:28 +00:00
commit 744583433e
1 changed files with 5 additions and 5 deletions
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10
src/minivhd/minivhd_io.c
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@ -245,6 +245,10 @@ int mvhd_sparse_diff_write(MVHDMeta* vhdm, uint32_t offset, int num_sectors, voi
for (s = offset; s < ls; s++) {
blk = s / vhdm->sect_per_block;
sib = s % vhdm->sect_per_block;
if (vhdm->bitmap.curr_block != blk && prev_blk >= 0) {
/* Write the sector bitmap for the previous block, before we replace it. */
mvhd_write_curr_sect_bitmap(vhdm);
}
if (vhdm->block_offset[blk] == MVHD_SPARSE_BLK) {
/* "read" the sector bitmap first, before creating a new block, as the bitmap will be
zero either way */
@ -252,11 +256,7 @@ int mvhd_sparse_diff_write(MVHDMeta* vhdm, uint32_t offset, int num_sectors, voi
mvhd_create_block(vhdm, blk);
}
if (blk != prev_blk) {
if (vhdm->bitmap.curr_block != blk) {
if (prev_blk >= 0) {
/* Write the sector bitmap for the previous block, before we replace it. */
mvhd_write_curr_sect_bitmap(vhdm);
}
if (vhdm->bitmap.curr_block != blk) {
mvhd_read_sect_bitmap(vhdm, blk);
mvhd_fseeko64(vhdm->f, (uint64_t)sib * MVHD_SECTOR_SIZE, SEEK_CUR);
} else {