FORMAT_MASK__F_INIT is (0<<16) on line 449

[moridinga]

Why is it not (1<<16)? Seems to be a typo.

[wonder-mice]

No, comment above explains it:

/* Used to implement _ZF_LOG_MESSAGE_FORMAT_CONTAINS() macro. All possible
 * fields must be mentioned here. Not counting F_INIT() here because it's
 * somewhat special and is handled spearatly (at least for now).
 */