/usr/include/minidjvu/djvu/iff.h is in libminidjvu-dev 0.8.svn.2010.05.06+dfsg-5+b2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | /*
* iff.h - read/write IFF files (DjVu files are IFF)
*/
/* IFF is a very simple format that allows some parts of a file to be decorated
* as "IFF chunks". An IFF chunk looks like this:
* __________________________________________ _
* | | | | ... |
* | padding (if needed) | ID | length | data ... |
* |_____________________|____|________|______ ... _|
*
* IFF chunks may be nested.
*
* See DjVu 2 Spec., page 5, "Structure of DjVu files" for deeper description.
*/
/* IFF chunk identifiers are 32-bit integers.
* The macro is here because MDJVU_IFF_ID("DJVU") looks better than 0x444A5655.
*/
#define MDJVU_IFF_ID(S) \
((S)[0] << 24) | \
((S)[1] << 16) | \
((S)[2] << 8) | \
(S)[3]
/* mdjvu_iff_t represents one IFF chunk. */
typedef struct MdjvuNonexistentIffStruct *mdjvu_iff_t;
/* Get the ID of the chunk. */
MDJVU_FUNCTION int32 mdjvu_iff_get_id(mdjvu_iff_t);
/* Get the length of the chunk's data.
* Useful only when reading; returns 0 if we're writing to the chunk instead.
*/
MDJVU_FUNCTION int32 mdjvu_iff_get_length(mdjvu_iff_t);
/* Opens a chunk for reading. The file must be seekable. */
MDJVU_FUNCTION mdjvu_iff_t mdjvu_iff_read_chunk(mdjvu_file_t);
/* Opens a chunk for writing. The file must be seekable. */
MDJVU_FUNCTION mdjvu_iff_t mdjvu_iff_write_chunk(int32 id, mdjvu_file_t);
/* Closes a chunk.
* If we're reading, the file cursor is set to the end of chunk.
* If we're writing, the file cursor must be at the end of chunk before calling.
*
* The mdjvu_iff_t object is destroyed.
*
* No checks are made to ensure that chunks are closed in the proper order
* (that is, first opened - last closed). But please do it properly.
*/
MDJVU_FUNCTION void mdjvu_iff_close_chunk(mdjvu_iff_t, mdjvu_file_t);
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