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objectlog: add object length helper

This commit is contained in:
Tobias Schramm 2021-05-24 20:41:34 +02:00
parent 24c9f59060
commit a2f7c621ce
2 changed files with 28 additions and 0 deletions
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27
src/objectlog.c
View File

@ -200,3 +200,30 @@ objectlog_iterator_t objectlog_next(objectlog_t *log, objectlog_iterator_t itera
iterator %= log->ring.size;
return iterator;
}
/**
* Get size of object at index @object_idx
*
* @returns: -1 on failure, else
* non-negative length of object
*/
long objectlog_get_object_size(objectlog_t *log, int object_idx) {
objectlog_iterator_t iter;
uint16_t len = 0;
iter = objectlog_iterator(log, object_idx);
if (iter < 0) {
return -1;
}
while (iter >= 0) {
uint8_t fragment_size;
if (!objectlog_get_fragment(log, iter, &fragment_size)) {
return -1;
}
len += fragment_size;
iter = objectlog_next(log, iter);
}
return len;
}

1
src/objectlog.h
View File

@ -19,3 +19,4 @@ void objectlog_write_string(objectlog_t *log, const char *str);
objectlog_iterator_t objectlog_iterator(objectlog_t *log, int object_idx);
const void *objectlog_get_fragment(objectlog_t *log, objectlog_iterator_t iterator, uint8_t *len);
objectlog_iterator_t objectlog_next(objectlog_t *log, objectlog_iterator_t iterator);
long objectlog_get_object_size(objectlog_t *log, int object_idx);