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For consistency with equipment, use our table macros for pictures. Generally tables (arrays) are preferred over linked lists, because they allow random access. This is mostly copy & paste of the equipment code. Sadly, our table macros are quite messy and need some revamping. Therefore, the resulting code is likewise somewhat messy. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#ifndef PICTURE_H
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#define PICTURE_H
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// picture (more precisely media) related strutures and functions
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#include "units.h"
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#include <stddef.h> // For NULL
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct picture {
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char *filename;
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offset_t offset;
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location_t location;
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};
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static const struct picture empty_picture = { NULL, { 0 }, { { 0 }, { 0 } } };
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/* Table of pictures. Attention: this stores pictures,
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* *not* pointers to pictures. This has two crucial consequences:
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* 1) Pointers to pictures are not stable. They may be
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* invalidated if the table is reallocated.
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* 2) add_to_picture_table(), etc. take ownership of the
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* picture. Notably of the filename. */
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struct picture_table {
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int nr, allocated;
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struct picture *pictures;
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};
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/* picture table functions */
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extern void clear_picture_table(struct picture_table *);
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extern void add_to_picture_table(struct picture_table *, int idx, struct picture pic);
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extern void copy_pictures(const struct picture_table *s, struct picture_table *d);
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extern void add_picture(struct picture_table *, struct picture newpic);
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extern bool remove_picture(struct picture_table *, const char *filename);
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#ifdef __cplusplus
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}
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#endif
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#endif // PICTURE_H
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