77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/* vim: set noet ts=8 sts=8 sw=8 : */
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/**
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* Functions and structures used for SUSP (IEEE 1281).
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*
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* Please refer to IEEE P1281 System Use Sharing Protocol, draft standard
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* version 1.12 for more details.
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*/
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#ifndef __ISO_SUSP
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#define __ISO_SUSP
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#include <stdint.h>
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/* SUSP is only present in standard ecma119 */
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struct ecma119_write_target;
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struct ecma119_tree_node;
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/** This contains the information that needs to go in the SUSP area of a file.
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*/
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struct susp_info
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{
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int n_susp_fields; /**< Number of SUSP fields */
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uint8_t **susp_fields; /**< Data for each SUSP field */
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/* the next 3 relate to CE and are filled out by susp_add_CE. */
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int n_fields_fit; /**< How many of the above SUSP fields fit
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* within this node's dirent. */
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int non_CE_len; /**< Length of the part of the SUSP area that
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* fits in the dirent. */
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int CE_len; /**< Length of the part of the SUSP area that
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* will go in a CE area. */
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};
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/**
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* Add a CE System Use Entry to the given tree node. A "CE" is used to add
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* a continuation area, where additional System Use Entry can be written.
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* See IEEE P1281, section 5.1.
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*/
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void susp_add_CE(struct ecma119_write_target *, struct ecma119_tree_node *);
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/**
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* Add a SP System Use Entry to the "." entry of the directory. The SP provide
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* an identifier that the SUSP is used within the volume. The SP shall be
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* recorded in the "." entry of the root directory.
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* See IEEE P1281, section 5.3 for more details.
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*
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* this is special because it doesn't modify the susp fields of the
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* directory; it modifies the susp fields of the "." entry in the directory.
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*/
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void susp_add_SP(struct ecma119_write_target *, struct ecma119_tree_node *);
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/** Once all the directories and files are laid out, recurse through the tree
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* and finalize all SUSP CE entries. */
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void susp_finalize(struct ecma119_write_target *, struct ecma119_tree_node *);
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void susp_append(struct ecma119_write_target *,
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struct susp_info *,
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uint8_t *);
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void susp_insert(struct ecma119_write_target *,
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struct susp_info *,
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uint8_t *,
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int pos);
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uint8_t *susp_find(struct susp_info *,
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const char *);
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void susp_write(struct ecma119_write_target *,
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struct susp_info *,
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uint8_t *);
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void susp_write_CE(struct ecma119_write_target *,
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struct susp_info *,
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uint8_t *);
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void susp_free_fields(struct susp_info *);
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#endif /* __ISO_SUSP */
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