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fatfsgen.py: Speedup FAT cluster allocation in fatfsgen.py
Closes IDF-5243
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9b87390daf
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d56e692f2f
@ -22,6 +22,7 @@ class FAT:
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self.clusters[Cluster.ROOT_BLOCK_ID].allocate_cluster()
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def __init__(self, boot_sector_state: BootSectorState, init_: bool) -> None:
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self._first_free_cluster_id = 0
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self.boot_sector_state = boot_sector_state
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self.clusters: List[Cluster] = [Cluster(cluster_id=i,
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boot_sector_state=self.boot_sector_state,
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@ -57,9 +58,11 @@ class FAT:
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def find_free_cluster(self) -> Cluster:
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# finds first empty cluster and allocates it
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for cluster in self.clusters:
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for cluster_id, cluster in enumerate(self.clusters[self._first_free_cluster_id:],
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start=self._first_free_cluster_id):
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if cluster.is_empty:
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cluster.allocate_cluster()
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self._first_free_cluster_id = cluster_id
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return cluster
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raise NoFreeClusterException('No free cluster available!')
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