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Simplify address arithmetic in Pl_TIFFPredictor

This commit is contained in:
m-holger 2024-01-21 18:21:01 +00:00
parent 5b7a44e1cc
commit 73dec35209
1 changed files with 9 additions and 11 deletions
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20
libqpdf/Pl_TIFFPredictor.cc
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@ -37,23 +37,21 @@ Pl_TIFFPredictor::Pl_TIFFPredictor(
void
Pl_TIFFPredictor::write(unsigned char const* data, size_t len)
{
size_t left = this->bytes_per_row - cur_row.size();
size_t offset = 0;
while (len >= left) {
auto end = data + len;
auto row_end = data + (bytes_per_row - cur_row.size());
while (row_end <= end) {
// finish off current row
cur_row.insert(cur_row.end(), data + offset, data + offset + left);
offset += left;
len -= left;
cur_row.insert(cur_row.end(), data, row_end);
data = row_end;
row_end += bytes_per_row;
processRow();
// Prepare for next row
this->cur_row.clear();
left = this->bytes_per_row;
}
if (len) {
cur_row.insert(cur_row.end(), data + offset, data + offset + len);
cur_row.clear();
}
cur_row.insert(cur_row.end(), data, end);
}
void