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5 <title>MIME API
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346 MIME API header for CUPS.
348 Copyright 2009 by Apple Inc.
350 These coded instructions, statements, and computer programs are the
351 property of Apple Inc. and are protected by Federal copyright
352 law. Distribution and use rights are outlined in the file "LICENSE.txt"
353 which should have been included with this file. If this file is
354 file is missing or damaged, see the license at "http://www.cups.org/".
357 <h1 class='title'
>MIME API
</h1>
359 <div class='summary'
><table summary='General Information'
>
373 <td>Programming:
<a href='api-overview.html' target='_top'
>Introduction to CUPS Programming
</a></td>
377 <h2 class=
"title">Contents
</h2>
378 <ul class=
"contents">
379 <li><a href=
"#OVERVIEW">Overview
</a></li>
380 <li><a href=
"#FUNCTIONS">Functions
</a><ul class=
"code">
381 <li><a href=
"#mimeAddFilter" title=
"Add a filter to the current MIME database.">mimeAddFilter
</a></li>
382 <li><a href=
"#mimeAddType" title=
"Add a MIME type to a database.">mimeAddType
</a></li>
383 <li><a href=
"#mimeAddTypeRule" title=
"Add a detection rule for a file type.">mimeAddTypeRule
</a></li>
384 <li><a href=
"#mimeDelete" title=
"Delete (free) a MIME database.">mimeDelete
</a></li>
385 <li><a href=
"#mimeDeleteFilter" title=
"Delete a filter from the MIME database.">mimeDeleteFilter
</a></li>
386 <li><a href=
"#mimeDeleteType" title=
"Delete a type from the MIME database.">mimeDeleteType
</a></li>
387 <li><a href=
"#mimeFileType" title=
"Determine the type of a file.">mimeFileType
</a></li>
388 <li><a href=
"#mimeFilter" title=
"Find the fastest way to convert from one type to another.">mimeFilter
</a></li>
389 <li><a href=
"#mimeFilter2" title=
"Find the fastest way to convert from one type to another,
390 including file size.">mimeFilter2
</a></li>
391 <li><a href=
"#mimeFilterLookup" title=
"Lookup a filter.">mimeFilterLookup
</a></li>
392 <li><a href=
"#mimeFirstFilter" title=
"Get the first filter in the MIME database.">mimeFirstFilter
</a></li>
393 <li><a href=
"#mimeFirstType" title=
"Get the first type in the MIME database.">mimeFirstType
</a></li>
394 <li><a href=
"#mimeLoad" title=
"Create a new MIME database from disk.">mimeLoad
</a></li>
395 <li><a href=
"#mimeLoadFilters" title=
"Load filter definitions from disk.">mimeLoadFilters
</a></li>
396 <li><a href=
"#mimeLoadTypes" title=
"Load type definitions from disk.">mimeLoadTypes
</a></li>
397 <li><a href=
"#mimeNextFilter" title=
"Get the next filter in the MIME database.">mimeNextFilter
</a></li>
398 <li><a href=
"#mimeNextType" title=
"Get the next type in the MIME database.">mimeNextType
</a></li>
399 <li><a href=
"#mimeNumFilters" title=
"Next type">mimeNumFilters
</a></li>
400 <li><a href=
"#mimeNumTypes" title=
"MIME database">mimeNumTypes
</a></li>
401 <li><a href=
"#mimeType" title=
"Lookup a file type.">mimeType
</a></li>
403 <li><a href=
"#TYPES">Data Types
</a><ul class=
"code">
404 <li><a href=
"#mime_filter_t" title=
"MIME Conversion Filter Data">mime_filter_t
</a></li>
405 <li><a href=
"#mime_magic_t" title=
"MIME Magic Data">mime_magic_t
</a></li>
406 <li><a href=
"#mime_op_t" title=
"Types/structures...">mime_op_t
</a></li>
407 <li><a href=
"#mime_t" title=
"MIME Database">mime_t
</a></li>
408 <li><a href=
"#mime_type_t" title=
"MIME Type Data">mime_type_t
</a></li>
414 MIME API introduction for CUPS.
416 Copyright 2009 by Apple Inc.
418 These coded instructions, statements, and computer programs are the
419 property of Apple Inc. and are protected by Federal copyright
420 law. Distribution and use rights are outlined in the file "LICENSE.txt"
421 which should have been included with this file. If this file is
422 file is missing or damaged, see the license at "http://www.cups.org/".
425 <h2 class='title'
><a name='OVERVIEW'
>Overview
</a></h2>
427 <p>The MIME API provides file typing and conversion services for CUPS.
</p>
428 <h2 class=
"title"><a name=
"FUNCTIONS">Functions
</a></h2>
429 <h3 class=
"function"><a name=
"mimeAddFilter">mimeAddFilter
</a></h3>
430 <p class=
"description">Add a filter to the current MIME database.
</p>
432 <a href=
"#mime_filter_t">mime_filter_t
</a> *mimeAddFilter (
<br>
433 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
434 <a href=
"#mime_type_t">mime_type_t
</a> *src,
<br>
435 <a href=
"#mime_type_t">mime_type_t
</a> *dst,
<br>
436 int cost,
<br>
437 const char *filter
<br>
439 <h4 class=
"parameters">Parameters
</h4>
442 <dd class=
"description">MIME database
</dd>
444 <dd class=
"description">Source type
</dd>
446 <dd class=
"description">Destination type
</dd>
448 <dd class=
"description">Relative time/resource cost
</dd>
450 <dd class=
"description">Filter program to run
</dd>
452 <h4 class=
"returnvalue">Return Value
</h4>
453 <p class=
"description">New filter
</p>
454 <h3 class=
"function"><a name=
"mimeAddType">mimeAddType
</a></h3>
455 <p class=
"description">Add a MIME type to a database.
</p>
457 <a href=
"#mime_type_t">mime_type_t
</a> *mimeAddType (
<br>
458 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
459 const char *super,
<br>
460 const char *type
<br>
462 <h4 class=
"parameters">Parameters
</h4>
465 <dd class=
"description">MIME database
</dd>
467 <dd class=
"description">Super-type name
</dd>
469 <dd class=
"description">Type name
</dd>
471 <h4 class=
"returnvalue">Return Value
</h4>
472 <p class=
"description">New (or existing) MIME type
</p>
473 <h3 class=
"function"><a name=
"mimeAddTypeRule">mimeAddTypeRule
</a></h3>
474 <p class=
"description">Add a detection rule for a file type.
</p>
476 int mimeAddTypeRule (
<br>
477 <a href=
"#mime_type_t">mime_type_t
</a> *mt,
<br>
478 const char *rule
<br>
480 <h4 class=
"parameters">Parameters
</h4>
483 <dd class=
"description">Type to add to
</dd>
485 <dd class=
"description">Rule to add
</dd>
487 <h4 class=
"returnvalue">Return Value
</h4>
488 <p class=
"description">0 on success, -
1 on failure
</p>
489 <h3 class=
"function"><a name=
"mimeDelete">mimeDelete
</a></h3>
490 <p class=
"description">Delete (free) a MIME database.
</p>
492 void mimeDelete (
<br>
493 <a href=
"#mime_t">mime_t
</a> *mime
<br>
495 <h4 class=
"parameters">Parameters
</h4>
498 <dd class=
"description">MIME database
</dd>
500 <h3 class=
"function"><a name=
"mimeDeleteFilter">mimeDeleteFilter
</a></h3>
501 <p class=
"description">Delete a filter from the MIME database.
</p>
503 void mimeDeleteFilter (
<br>
504 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
505 <a href=
"#mime_filter_t">mime_filter_t
</a> *filter
<br>
507 <h4 class=
"parameters">Parameters
</h4>
510 <dd class=
"description">MIME database
</dd>
512 <dd class=
"description">Filter
</dd>
514 <h3 class=
"function"><a name=
"mimeDeleteType">mimeDeleteType
</a></h3>
515 <p class=
"description">Delete a type from the MIME database.
</p>
517 void mimeDeleteType (
<br>
518 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
519 <a href=
"#mime_type_t">mime_type_t
</a> *mt
<br>
521 <h4 class=
"parameters">Parameters
</h4>
524 <dd class=
"description">MIME database
</dd>
526 <dd class=
"description">Type
</dd>
528 <h3 class=
"function"><a name=
"mimeFileType">mimeFileType
</a></h3>
529 <p class=
"description">Determine the type of a file.
</p>
531 <a href=
"#mime_type_t">mime_type_t
</a> *mimeFileType (
<br>
532 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
533 const char *pathname,
<br>
534 const char *filename,
<br>
535 int *compression
<br>
537 <h4 class=
"parameters">Parameters
</h4>
540 <dd class=
"description">MIME database
</dd>
542 <dd class=
"description">Name of file to check on disk
</dd>
544 <dd class=
"description">Original filename or NULL
</dd>
546 <dd class=
"description">Is the file compressed?
</dd>
548 <h4 class=
"returnvalue">Return Value
</h4>
549 <p class=
"description">Type of file
</p>
550 <h3 class=
"function"><a name=
"mimeFilter">mimeFilter
</a></h3>
551 <p class=
"description">Find the fastest way to convert from one type to another.
</p>
553 cups_array_t *mimeFilter (
<br>
554 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
555 <a href=
"#mime_type_t">mime_type_t
</a> *src,
<br>
556 <a href=
"#mime_type_t">mime_type_t
</a> *dst,
<br>
557 int *cost
<br>
559 <h4 class=
"parameters">Parameters
</h4>
562 <dd class=
"description">MIME database
</dd>
564 <dd class=
"description">Source file type
</dd>
566 <dd class=
"description">Destination file type
</dd>
568 <dd class=
"description">Cost of filters
</dd>
570 <h4 class=
"returnvalue">Return Value
</h4>
571 <p class=
"description">Array of filters to run
</p>
572 <h3 class=
"function"><a name=
"mimeFilter2">mimeFilter2
</a></h3>
573 <p class=
"description">Find the fastest way to convert from one type to another,
574 including file size.
</p>
576 cups_array_t *mimeFilter2 (
<br>
577 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
578 <a href=
"#mime_type_t">mime_type_t
</a> *src,
<br>
579 size_t srcsize,
<br>
580 <a href=
"#mime_type_t">mime_type_t
</a> *dst,
<br>
581 int *cost
<br>
583 <h4 class=
"parameters">Parameters
</h4>
586 <dd class=
"description">MIME database
</dd>
588 <dd class=
"description">Source file type
</dd>
590 <dd class=
"description">Size of source file
</dd>
592 <dd class=
"description">Destination file type
</dd>
594 <dd class=
"description">Cost of filters
</dd>
596 <h4 class=
"returnvalue">Return Value
</h4>
597 <p class=
"description">Array of filters to run
</p>
598 <h3 class=
"function"><a name=
"mimeFilterLookup">mimeFilterLookup
</a></h3>
599 <p class=
"description">Lookup a filter.
</p>
601 <a href=
"#mime_filter_t">mime_filter_t
</a> *mimeFilterLookup (
<br>
602 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
603 <a href=
"#mime_type_t">mime_type_t
</a> *src,
<br>
604 <a href=
"#mime_type_t">mime_type_t
</a> *dst
<br>
606 <h4 class=
"parameters">Parameters
</h4>
609 <dd class=
"description">MIME database
</dd>
611 <dd class=
"description">Source type
</dd>
613 <dd class=
"description">Destination type
</dd>
615 <h4 class=
"returnvalue">Return Value
</h4>
616 <p class=
"description">Filter for src-
>dst
</p>
617 <h3 class=
"function"><a name=
"mimeFirstFilter">mimeFirstFilter
</a></h3>
618 <p class=
"description">Get the first filter in the MIME database.
</p>
620 <a href=
"#mime_filter_t">mime_filter_t
</a> *mimeFirstFilter (
<br>
621 <a href=
"#mime_t">mime_t
</a> *mime
<br>
623 <h4 class=
"parameters">Parameters
</h4>
626 <dd class=
"description">MIME database
</dd>
628 <h4 class=
"returnvalue">Return Value
</h4>
629 <p class=
"description">Filter or NULL
</p>
630 <h3 class=
"function"><a name=
"mimeFirstType">mimeFirstType
</a></h3>
631 <p class=
"description">Get the first type in the MIME database.
</p>
633 <a href=
"#mime_type_t">mime_type_t
</a> *mimeFirstType (
<br>
634 <a href=
"#mime_t">mime_t
</a> *mime
<br>
636 <h4 class=
"parameters">Parameters
</h4>
639 <dd class=
"description">MIME database
</dd>
641 <h4 class=
"returnvalue">Return Value
</h4>
642 <p class=
"description">Type or NULL
</p>
643 <h3 class=
"function"><a name=
"mimeLoad">mimeLoad
</a></h3>
644 <p class=
"description">Create a new MIME database from disk.
</p>
646 <a href=
"#mime_t">mime_t
</a> *mimeLoad (
<br>
647 const char *pathname,
<br>
648 const char *filterpath
<br>
650 <h4 class=
"parameters">Parameters
</h4>
653 <dd class=
"description">Directory to load
</dd>
655 <dd class=
"description">Directory to load
</dd>
657 <h4 class=
"returnvalue">Return Value
</h4>
658 <p class=
"description">New MIME database
</p>
659 <h4 class=
"discussion">Discussion
</h4>
660 <p class=
"discussion">This function uses
<a href=
"#mimeLoadFilters"><code>mimeLoadFilters
</code></a> and
<a href=
"#mimeLoadTypes"><code>mimeLoadTypes
</code></a> to
661 create a MIME database from a single directory.
</p>
662 <h3 class=
"function"><a name=
"mimeLoadFilters">mimeLoadFilters
</a></h3>
663 <p class=
"description">Load filter definitions from disk.
</p>
665 <a href=
"#mime_t">mime_t
</a> *mimeLoadFilters (
<br>
666 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
667 const char *pathname,
<br>
668 const char *filterpath
<br>
670 <h4 class=
"parameters">Parameters
</h4>
673 <dd class=
"description">MIME database
</dd>
675 <dd class=
"description">Directory to load from
</dd>
677 <dd class=
"description">Default filter program directory
</dd>
679 <h4 class=
"returnvalue">Return Value
</h4>
680 <p class=
"description">MIME database
</p>
681 <h4 class=
"discussion">Discussion
</h4>
682 <p class=
"discussion">This function loads all of the .convs files from the specified directory.
683 Use
<a href=
"#mimeLoadTypes"><code>mimeLoadTypes
</code></a> to load all types before you load the filters.
</p>
684 <h3 class=
"function"><a name=
"mimeLoadTypes">mimeLoadTypes
</a></h3>
685 <p class=
"description">Load type definitions from disk.
</p>
687 <a href=
"#mime_t">mime_t
</a> *mimeLoadTypes (
<br>
688 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
689 const char *pathname
<br>
691 <h4 class=
"parameters">Parameters
</h4>
694 <dd class=
"description">MIME database or
<code>NULL
</code> to create a new one
</dd>
696 <dd class=
"description">Directory to load from
</dd>
698 <h4 class=
"returnvalue">Return Value
</h4>
699 <p class=
"description">MIME database
</p>
700 <h4 class=
"discussion">Discussion
</h4>
701 <p class=
"discussion">This function loads all of the .types files from the specified directory.
702 Use
<a href=
"#mimeLoadFilters"><code>mimeLoadFilters
</code></a> to load all filters after you load the types.
</p>
703 <h3 class=
"function"><a name=
"mimeNextFilter">mimeNextFilter
</a></h3>
704 <p class=
"description">Get the next filter in the MIME database.
</p>
706 <a href=
"#mime_filter_t">mime_filter_t
</a> *mimeNextFilter (
<br>
707 <a href=
"#mime_t">mime_t
</a> *mime
<br>
709 <h4 class=
"parameters">Parameters
</h4>
712 <dd class=
"description">MIME database
</dd>
714 <h4 class=
"returnvalue">Return Value
</h4>
715 <p class=
"description">Filter or NULL
</p>
716 <h3 class=
"function"><a name=
"mimeNextType">mimeNextType
</a></h3>
717 <p class=
"description">Get the next type in the MIME database.
</p>
719 <a href=
"#mime_type_t">mime_type_t
</a> *mimeNextType (
<br>
720 <a href=
"#mime_t">mime_t
</a> *mime
<br>
722 <h4 class=
"parameters">Parameters
</h4>
725 <dd class=
"description">MIME database
</dd>
727 <h4 class=
"returnvalue">Return Value
</h4>
728 <p class=
"description">Type or NULL
</p>
729 <h3 class=
"function"><a name=
"mimeNumFilters">mimeNumFilters
</a></h3>
730 <p class=
"description">Next type
</p>
732 int mimeNumFilters (
<br>
733 <a href=
"#mime_t">mime_t
</a> *mime
<br>
735 <h4 class=
"parameters">Parameters
</h4>
738 <dd class=
"description">MIME database
</dd>
740 <h4 class=
"returnvalue">Return Value
</h4>
741 <p class=
"description">Get the number of filters in a MIME database.
</p>
742 <h3 class=
"function"><a name=
"mimeNumTypes">mimeNumTypes
</a></h3>
743 <p class=
"description">MIME database
</p>
745 int mimeNumTypes (
<br>
746 <a href=
"#mime_t">mime_t
</a> *mime
<br>
748 <h4 class=
"parameters">Parameters
</h4>
751 <dd class=
"description">MIME database
</dd>
753 <h4 class=
"returnvalue">Return Value
</h4>
754 <p class=
"description">Get the number of types in a MIME database.
</p>
755 <h3 class=
"function"><a name=
"mimeType">mimeType
</a></h3>
756 <p class=
"description">Lookup a file type.
</p>
758 <a href=
"#mime_type_t">mime_type_t
</a> *mimeType (
<br>
759 <a href=
"#mime_t">mime_t
</a> *mime,
<br>
760 const char *super,
<br>
761 const char *type
<br>
763 <h4 class=
"parameters">Parameters
</h4>
766 <dd class=
"description">MIME database
</dd>
768 <dd class=
"description">Super-type name
</dd>
770 <dd class=
"description">Type name
</dd>
772 <h4 class=
"returnvalue">Return Value
</h4>
773 <p class=
"description">Matching file type definition
</p>
774 <h2 class=
"title"><a name=
"TYPES">Data Types
</a></h2>
775 <h3 class=
"typedef"><a name=
"mime_filter_t">mime_filter_t
</a></h3>
776 <p class=
"description">MIME Conversion Filter Data
</p>
778 typedef struct _mime_filter_s mime_filter_t;
780 <h3 class=
"typedef"><a name=
"mime_magic_t">mime_magic_t
</a></h3>
781 <p class=
"description">MIME Magic Data
</p>
783 typedef struct _mime_magic_s mime_magic_t;
785 <h3 class=
"typedef"><a name=
"mime_op_t">mime_op_t
</a></h3>
786 <p class=
"description">Types/structures...
</p>
788 typedef enum mime_op_t;
790 <h3 class=
"typedef"><a name=
"mime_t">mime_t
</a></h3>
791 <p class=
"description">MIME Database
</p>
793 typedef struct _mime_s mime_t;
795 <h3 class=
"typedef"><a name=
"mime_type_t">mime_type_t
</a></h3>
796 <p class=
"description">MIME Type Data
</p>
798 typedef struct _mime_type_s mime_type_t;