summaryrefslogtreecommitdiff
path: root/include/meta_reader.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/meta_reader.h')
-rw-r--r--include/meta_reader.h111
1 files changed, 9 insertions, 102 deletions
diff --git a/include/meta_reader.h b/include/meta_reader.h
index a662959..16003f6 100644
--- a/include/meta_reader.h
+++ b/include/meta_reader.h
@@ -7,124 +7,31 @@
typedef struct meta_reader_t meta_reader_t;
-/**
- * @brief Create a meta data reader
- *
- * @memberof meta_reader_t
- *
- * @note This function internally prints error message to stderr on failure
- *
- * @param fd The underlying file descriptor to read from
- * @param cmp A pointer to a compressor to use for extracting the data
- *
- * @return A pointer to a meta data reader, NULL on failure
- */
+/* Create a meta data reader using a given compressor to extract data.
+ Internally prints error message to stderr on failure. */
meta_reader_t *meta_reader_create(int fd, compressor_t *cmp);
-/**
- * @brief Destroy a meta data reader and free all memory used by it
- *
- * @memberof meta_reader_t
- *
- * @param m A pointer to a meta data reader
- */
void meta_reader_destroy(meta_reader_t *m);
-/**
- * @brief Seek to a specific meta data block and offset
- *
- * @memberof meta_reader_t
- *
- * @note This function internally prints error message to stderr on failure
- *
- * @param m A pointer to a meta data reader
- * @param block_start The absolute position of the 16 bit header right before
- * the compressed data block
- * @param offset A byte offset into the data block
- *
- * @return Zero on success, -1 on failure
- */
+/* Returns 0 on success. Internally prints to stderr on failure */
int meta_reader_seek(meta_reader_t *m, uint64_t block_start,
size_t offset);
-/**
- * @brief Read a chunk of data from a meta data block
- *
- * @memberof meta_reader_t
- *
- * @note This function internally prints error message to stderr on failure
- *
- * If the end of the block is reached, this function transparently tries to
- * interpret the data after the current block as a further meta data block,
- * i.e. it can transparently read across multiple meta data blocks.
- *
- * @param m A pointer to a meta data reader
- * @param data A pointer to a memory block to write the data to
- * @param size The number of bytes to read
- *
- * @return Zero on success, -1 on failure
- */
+/* Returns 0 on success. Internally prints to stderr on failure */
int meta_reader_read(meta_reader_t *m, void *data, size_t size);
-/**
- * @brief Read an inode from a meta data block
- *
- * @memberof meta_reader_t
- *
- * @note This function internally prints error message to stderr on failure
- *
- * This function is a conveniance wrapper around @ref meta_reader_read that
- * reads and decodes an entire SquashFS inode. It first reads the common inode
- * header, interprets it and reads the additional, type dependend data.
- *
- * @param ir A pointer to a meta data reader
- * @param super A pointer to the SquashFS super block
- * @param block_start A byte offset relative to the inode table start where
- * the meta data containing the inode starts
- * @param offset A byte offset into the uncompressed meta data block
- * where the inode is stored
- *
- * @return A pointer to the decoded inode or NULL on failure. Can be freed
- * with a single free call.
- */
+/* Inode can be freed with a single free() call.
+ The function internally prints error message to stderr on failure. */
sqfs_inode_generic_t *meta_reader_read_inode(meta_reader_t *ir,
sqfs_super_t *super,
uint64_t block_start,
size_t offset);
-/**
- * @brief Read a directory header from a meta data block
- *
- * @memberof meta_reader_t
- *
- * @note This function internally prints error message to stderr on failure
- *
- * This function is a conveniance wrapper around @ref meta_reader_read that
- * reads and decodes a SquashFS directory header.
- *
- * @param m A pointer to a meta data reader
- * @param hdr A pointer to a directory header structure to write the decoded
- * data to
- *
- * @return Zero on success, -1 on failure
- */
+/* Returns 0 on success. Internally prints to stderr on failure */
int meta_reader_read_dir_header(meta_reader_t *m, sqfs_dir_header_t *hdr);
-/**
- * @brief Read a directory entry from a meta data block
- *
- * @memberof meta_reader_t
- *
- * @note This function internally prints error message to stderr on failure
- *
- * This function is a conveniance wrapper around @ref meta_reader_read that
- * reads and decodes a SquashFS directory entry.
- *
- * @param m A pointer to a meta data reader
- *
- * @return A pointer to a directory entry or NULL on failure. Can be freed
- * with a single free call.
- */
+/* Entry can be freed with a single free() call.
+ The function internally prints to stderr on failure */
sqfs_dir_entry_t *meta_reader_read_dir_ent(meta_reader_t *m);
#endif /* META_READER_H */