Difference between revisions of "ZIM file format"

| magicNumber            || integer || 0 || 4 || Magic number to recognise the file format, must be 72173914

| version                || integer || 4 || 4 || ZIM=4, version of the file format

| uuid                   || integer || 8 || 16 || unique id of this zim file

| count                  || integer || 24 || 4 || total number of articles

| indexPtrPos            || integer || 28 || 8 || position of the directory pointerlist

| clusterCount           || integer || 36 || 4 || number of data clusters

| clusterPtrPos         || integer || 40 || 8 || position of the cluster pointer list

| mainPage              || integer || 48 || 4 || article index of main page or 0xffffffff if no main page

| layoutPage             || integer || 52 || 4 || article index of layout page or 0xffffffffff if no layout page

Each article in the zim file has a directory entry. Since the directory entry has a variable size we have an index pointerlist which is a list of 4-byte offsets. The pointers points to the directory entries.