40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
#include <kernel/fs/smemfs.h>
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/* smemfs_walk() - Find inode based on directory ID and flags */
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/* @note: This function is internal of smemFS, do not call it ! */
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smemfs_inode_t *smemfs_walk(smemfs_inode_t *current,
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smemfs_inode_t *entry, uint16_t folder_id, int flags)
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{
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smemfs_fragdata_t *fragdata;
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// Check current inode validity.
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if (entry == NULL)
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return (NULL);
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// Walk entry
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while (entry->info == CASIO_SMEM_HEADER_INFO_EXIST ||
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entry->info == CASIO_SMEM_HEADER_INFO_DELETE)
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{
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// New inode validity check.
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if (entry != current &&
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entry->info == CASIO_SMEM_HEADER_INFO_EXIST &&
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(((flags & WALK_FLAG_ID_CHECK_PARENT) != 0 && entry->parent.id == folder_id) ||
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((flags & WALK_FLAG_ID_CHECK_PARENT) == 0 && entry->id == folder_id)))
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{
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return (entry);
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}
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// Fast fragmentation skip
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fragdata = (void *)((uint32_t)(entry) + sizeof(struct casio_smem_header_s));
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if (fragdata->magic == CASIO_SMEM_FRAGMENT_MAGIC)
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{
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fragdata = (void *)((uint32_t)fragdata +
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(sizeof(struct casio_smem_fragment_s) * fragdata->frag_total));
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}
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// Update current inode
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entry = (void*)fragdata;
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}
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return (NULL);
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}
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