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author | David Robillard <d@drobilla.net> | 2011-11-21 01:36:00 +0000 |
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committer | David Robillard <d@drobilla.net> | 2011-11-21 01:36:00 +0000 |
commit | eb43c8896480114b224755e824fae2e2f7485256 (patch) | |
tree | 26e91bd8dc6421d2296a33991e90f7dcb546b079 /lv2/ns/ext/urid/urid.h | |
parent | df79255ccef7fb5d091e9d4e52f3c46545b53282 (diff) | |
download | lv2-eb43c8896480114b224755e824fae2e2f7485256.tar.xz |
Move ns to lv2/ns so repository top level can be used as an include dir directly.
Diffstat (limited to 'lv2/ns/ext/urid/urid.h')
-rw-r--r-- | lv2/ns/ext/urid/urid.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/lv2/ns/ext/urid/urid.h b/lv2/ns/ext/urid/urid.h new file mode 100644 index 0000000..d36d0dd --- /dev/null +++ b/lv2/ns/ext/urid/urid.h @@ -0,0 +1,113 @@ +/* + Copyright 2011 Gabriel M. Beddingfield <gabrbedd@gmail.com> + Copyright 2008-2011 David Robillard <http://drobilla.net> + + Permission to use, copy, modify, and/or distribute this software for any + purpose with or without fee is hereby granted, provided that the above + copyright notice and this permission notice appear in all copies. + + THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +*/ + +/** + @file + C header for the LV2 URID extension <http://lv2plug.in/ns/ext/urid> +*/ + +#ifndef LV2_URID_H +#define LV2_URID_H + +#define LV2_URID_URI "http://lv2plug.in/ns/ext/urid" + +#include <stdint.h> + +/** + Opaque pointer to host data for LV2_URID_Map. +*/ +typedef void* LV2_URID_Map_Handle; + +/** + Opaque pointer to host data for LV2_URID_Unmap. +*/ +typedef void* LV2_URID_Unmap_Handle; + +/** + URI mapped to an integer. +*/ +typedef uint32_t LV2_URID; + +/** + URI Map (http://lv2plug.in/ns/ext/urid#map). +*/ +typedef struct { + /** + Opaque pointer to host data. + + This MUST be passed to map_uri() whenever it is called. + Otherwise, it must not be interpreted in any way. + */ + LV2_URID_Map_Handle handle; + + /** + Get the numeric ID of a URI. + + If the ID does not already exist, it will be created. + + This function is referentially transparent; any number of calls with the + same arguments is guaranteed to return the same value over the life of a + plugin instance. Note, however, that several URIs MAY resolve to the + same ID if the host considers those URIs equivalent. + + This function is not necessarily very fast or RT-safe: plugins SHOULD + cache any IDs they might need in performance critical situations. + + The return value 0 is reserved and indicates that an ID for that URI + could not be created for whatever reason. However, hosts SHOULD NOT + return 0 from this function in non-exceptional circumstances (i.e. the + URI map SHOULD be dynamic). + + @param handle Must be the callback_data member of this struct. + @param uri The URI to be mapped to an integer ID. + */ + LV2_URID (*map)(LV2_URID_Map_Handle handle, + const char* uri); +} LV2_URID_Map; + +/** + URI Unmap (http://lv2plug.in/ns/ext/urid#unmap). +*/ +typedef struct { + /** + Opaque pointer to host data. + + This MUST be passed to unmap() whenever it is called. + Otherwise, it must not be interpreted in any way. + */ + LV2_URID_Unmap_Handle handle; + + /** + Get the URI for a previously mapped numeric ID. + + Returns NULL if @c urid is not yet mapped. Otherwise, the corresponding + URI is returned in a canonical form. This MAY not be the exact same + string that was originally passed to LV2_URID_Map::map(), but it MUST be + an identical URI according to the URI syntax specification (RFC3986). A + non-NULL return for a given @c urid will always be the same for the life + of the plugin. Plugins that intend to perform string comparison on + unmapped URIs SHOULD first canonicalise URI strings with a call to + map_uri() followed by a call to unmap_uri(). + + @param handle Must be the callback_data member of this struct. + @param urid The ID to be mapped back to the URI string. + */ + const char* (*unmap)(LV2_URID_Unmap_Handle handle, + LV2_URID urid); +} LV2_URID_Unmap; + +#endif /* LV2_URID_H */ |