* Check if the data type is TEXT or BINARY, using the following algorithm:
* - TEXT if the two conditions below are satisfied:
* a) There are no non-portable control characters belonging to the
- * "black list" (0..6, 14..25, 28..31).
+ * "block list" (0..6, 14..25, 28..31).
* b) There is at least one printable character belonging to the
- * "white list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
+ * "allow list" (9 {TAB}, 10 {LF}, 13 {CR}, 32..255).
* - BINARY otherwise.
* - The following partially-portable control characters form a
* "gray list" that is ignored in this detection algorithm:
local int detect_data_type(s)
deflate_state *s;
{
- /* black_mask is the bit mask of black-listed bytes
+ /* block_mask is the bit mask of block-listed bytes
* set bits 0..6, 14..25, and 28..31
* 0xf3ffc07f = binary 11110011111111111100000001111111
*/
- unsigned long black_mask = 0xf3ffc07fUL;
+ unsigned long block_mask = 0xf3ffc07fUL;
int n;
- /* Check for non-textual ("black-listed") bytes. */
- for (n = 0; n <= 31; n++, black_mask >>= 1)
- if ((black_mask & 1) && (s->dyn_ltree[n].Freq != 0))
+ /* Check for non-textual ("block-listed") bytes. */
+ for (n = 0; n <= 31; n++, block_mask >>= 1)
+ if ((block_mask & 1) && (s->dyn_ltree[n].Freq != 0))
return Z_BINARY;
- /* Check for textual ("white-listed") bytes. */
+ /* Check for textual ("allow-listed") bytes. */
if (s->dyn_ltree[9].Freq != 0 || s->dyn_ltree[10].Freq != 0
|| s->dyn_ltree[13].Freq != 0)
return Z_TEXT;
if (s->dyn_ltree[n].Freq != 0)
return Z_TEXT;
- /* There are no "black-listed" or "white-listed" bytes:
+ /* There are no "block-listed" or "allow-listed" bytes:
* this stream either is empty or has tolerated ("gray-listed") bytes only.
*/
return Z_BINARY;