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- /*
- * Copyright (C) 2001-2006 Bart Massey, Jamey Sharp, and Josh Triplett.
- * All Rights Reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- *
- * Except as contained in this notice, the names of the authors or their
- * institutions shall not be used in advertising or otherwise to promote the
- * sale, use or other dealings in this Software without prior written
- * authorization from the authors.
- */
-
- #ifndef __XCB_H__
- #define __XCB_H__
- #include <sys/types.h>
-
- #if defined(__solaris__)
- #include <inttypes.h>
- #else
- #include <stdint.h>
- #endif
-
- #include <sys/uio.h>
- #include <pthread.h>
-
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- /**
- * @file xcb.h
- */
-
- /**
- * @defgroup XCB_Core_API XCB Core API
- * @brief Core API of the XCB library.
- *
- * @{
- */
-
- /* Pre-defined constants */
-
- /** Current protocol version */
- #define X_PROTOCOL 11
-
- /** Current minor version */
- #define X_PROTOCOL_REVISION 0
-
- /** X_TCP_PORT + display number = server port for TCP transport */
- #define X_TCP_PORT 6000
-
- #define XCB_TYPE_PAD(T,I) (-(I) & (sizeof(T) > 4 ? 3 : sizeof(T) - 1))
-
- /* Opaque structures */
-
- /**
- * @brief XCB Connection structure.
- *
- * A structure that contain all data that XCB needs to communicate with an X server.
- */
- typedef struct xcb_connection_t xcb_connection_t; /**< Opaque structure containing all data that XCB needs to communicate with an X server. */
-
-
- /* Other types */
-
- /**
- * @brief Generic iterator.
- *
- * A generic iterator structure.
- */
- typedef struct {
- void *data; /**< Data of the current iterator */
- int rem; /**< remaining elements */
- int index; /**< index of the current iterator */
- } xcb_generic_iterator_t;
-
- /**
- * @brief Generic reply.
- *
- * A generic reply structure.
- */
- typedef struct {
- uint8_t response_type; /**< Type of the response */
- uint8_t pad0; /**< Padding */
- uint16_t sequence; /**< Sequence number */
- uint32_t length; /**< Length of the response */
- } xcb_generic_reply_t;
-
- /**
- * @brief Generic event.
- *
- * A generic event structure.
- */
- typedef struct {
- uint8_t response_type; /**< Type of the response */
- uint8_t pad0; /**< Padding */
- uint16_t sequence; /**< Sequence number */
- uint32_t pad[7]; /**< Padding */
- uint32_t full_sequence; /**< full sequence */
- } xcb_generic_event_t;
-
- /**
- * @brief Generic error.
- *
- * A generic error structure.
- */
- typedef struct {
- uint8_t response_type; /**< Type of the response */
- uint8_t error_code; /**< Error code */
- uint16_t sequence; /**< Sequence number */
- uint32_t pad[7]; /**< Padding */
- uint32_t full_sequence; /**< full sequence */
- } xcb_generic_error_t;
-
- /**
- * @brief Generic cookie.
- *
- * A generic cookie structure.
- */
- typedef struct {
- unsigned int sequence; /**< Sequence number */
- } xcb_void_cookie_t;
-
-
- /* Include the generated xproto header. */
- #include "xproto.h"
-
-
- /** XCB_NONE is the universal null resource or null atom parameter value for many core X requests */
- #define XCB_NONE 0L
-
- /** XCB_COPY_FROM_PARENT can be used for many xcb_create_window parameters */
- #define XCB_COPY_FROM_PARENT 0L
-
- /** XCB_CURRENT_TIME can be used in most requests that take an xcb_timestamp_t */
- #define XCB_CURRENT_TIME 0L
-
- /** XCB_NO_SYMBOL fills in unused entries in xcb_keysym_t tables */
- #define XCB_NO_SYMBOL 0L
-
-
- /* xcb_auth.c */
-
- /**
- * @brief Container for authorization information.
- *
- * A container for authorization information to be sent to the X server.
- */
- typedef struct xcb_auth_info_t {
- int namelen; /**< Length of the string name (as returned by strlen). */
- char *name; /**< String containing the authentication protocol name, such as "MIT-MAGIC-COOKIE-1" or "XDM-AUTHORIZATION-1". */
- int datalen; /**< Length of the data member. */
- char *data; /**< Data interpreted in a protocol-specific manner. */
- } xcb_auth_info_t;
-
-
- /* xcb_out.c */
-
- /**
- * @brief Forces any buffered output to be written to the server.
- * @param c: The connection to the X server.
- * @return > @c 0 on success, <= @c 0 otherwise.
- *
- * Forces any buffered output to be written to the server. Blocks
- * until the write is complete.
- */
- int xcb_flush(xcb_connection_t *c);
-
- /**
- * @brief Returns the maximum request length that this server accepts.
- * @param c: The connection to the X server.
- * @return The maximum request length field.
- *
- * In the absence of the BIG-REQUESTS extension, returns the
- * maximum request length field from the connection setup data, which
- * may be as much as 65535. If the server supports BIG-REQUESTS, then
- * the maximum request length field from the reply to the
- * BigRequestsEnable request will be returned instead.
- *
- * Note that this length is measured in four-byte units, making the
- * theoretical maximum lengths roughly 256kB without BIG-REQUESTS and
- * 16GB with.
- */
- uint32_t xcb_get_maximum_request_length(xcb_connection_t *c);
-
- /**
- * @brief Prefetch the maximum request length without blocking.
- * @param c: The connection to the X server.
- *
- * Without blocking, does as much work as possible toward computing
- * the maximum request length accepted by the X server.
- *
- * Invoking this function may cause a call to xcb_big_requests_enable,
- * but will not block waiting for the reply.
- * xcb_get_maximum_request_length will return the prefetched data
- * after possibly blocking while the reply is retrieved.
- *
- * Note that in order for this function to be fully non-blocking, the
- * application must previously have called
- * xcb_prefetch_extension_data(c, &xcb_big_requests_id) and the reply
- * must have already arrived.
- */
- void xcb_prefetch_maximum_request_length(xcb_connection_t *c);
-
-
- /* xcb_in.c */
-
- /**
- * @brief Returns the next event or error from the server.
- * @param c: The connection to the X server.
- * @return The next event from the server.
- *
- * Returns the next event or error from the server, or returns null in
- * the event of an I/O error. Blocks until either an event or error
- * arrive, or an I/O error occurs.
- */
- xcb_generic_event_t *xcb_wait_for_event(xcb_connection_t *c);
-
- /**
- * @brief Returns the next event or error from the server.
- * @param c: The connection to the X server.
- * error status of the operation.
- * @return The next event from the server.
- *
- * Returns the next event or error from the server, if one is
- * available, or returns @c NULL otherwise. If no event is available, that
- * might be because an I/O error like connection close occurred while
- * attempting to read the next event, in which case the connection is
- * shut down when this function returns.
- */
- xcb_generic_event_t *xcb_poll_for_event(xcb_connection_t *c);
-
- /**
- * @brief Return the error for a request, or NULL if none can ever arrive.
- * @param c: The connection to the X server.
- * @param cookie: The request cookie.
- * @return The error for the request, or NULL if none can ever arrive.
- *
- * The xcb_void_cookie_t cookie supplied to this function must have resulted
- * from a call to xcb_[request_name]_checked(). This function will block
- * until one of two conditions happens. If an error is received, it will be
- * returned. If a reply to a subsequent request has already arrived, no error
- * can arrive for this request, so this function will return NULL.
- *
- * Note that this function will perform a sync if needed to ensure that the
- * sequence number will advance beyond that provided in cookie; this is a
- * convenience to avoid races in determining whether the sync is needed.
- */
- xcb_generic_error_t *xcb_request_check(xcb_connection_t *c, xcb_void_cookie_t cookie);
-
-
- /* xcb_ext.c */
-
- /**
- * @typedef typedef struct xcb_extension_t xcb_extension_t
- */
- typedef struct xcb_extension_t xcb_extension_t; /**< Opaque structure used as key for xcb_get_extension_data_t. */
-
- /**
- * @brief Caches reply information from QueryExtension requests.
- * @param c: The connection.
- * @param ext: The extension data.
- * @return A pointer to the xcb_query_extension_reply_t for the extension.
- *
- * This function is the primary interface to the "extension cache",
- * which caches reply information from QueryExtension
- * requests. Invoking this function may cause a call to
- * xcb_query_extension to retrieve extension information from the
- * server, and may block until extension data is received from the
- * server.
- *
- * The result must not be freed. This storage is managed by the cache
- * itself.
- */
- const xcb_query_extension_reply_t *xcb_get_extension_data(xcb_connection_t *c, xcb_extension_t *ext);
-
- /**
- * @brief Prefetch of extension data into the extension cache
- * @param c: The connection.
- * @param ext: The extension data.
- *
- * This function allows a "prefetch" of extension data into the
- * extension cache. Invoking the function may cause a call to
- * xcb_query_extension, but will not block waiting for the
- * reply. xcb_get_extension_data will return the prefetched data after
- * possibly blocking while it is retrieved.
- */
- void xcb_prefetch_extension_data(xcb_connection_t *c, xcb_extension_t *ext);
-
-
- /* xcb_conn.c */
-
- /**
- * @brief Access the data returned by the server.
- * @param c: The connection.
- * @return A pointer to an xcb_setup_t structure.
- *
- * Accessor for the data returned by the server when the xcb_connection_t
- * was initialized. This data includes
- * - the server's required format for images,
- * - a list of available visuals,
- * - a list of available screens,
- * - the server's maximum request length (in the absence of the
- * BIG-REQUESTS extension),
- * - and other assorted information.
- *
- * See the X protocol specification for more details.
- *
- * The result must not be freed.
- */
- const xcb_setup_t *xcb_get_setup(xcb_connection_t *c);
-
- /**
- * @brief Access the file descriptor of the connection.
- * @param c: The connection.
- * @return The file descriptor.
- *
- * Accessor for the file descriptor that was passed to the
- * xcb_connect_to_fd call that returned @p c.
- */
- int xcb_get_file_descriptor(xcb_connection_t *c);
-
- /**
- * @brief Test whether the connection has shut down due to a fatal error.
- * @param c: The connection.
- * @return 1 if the connection is in an error state; 0 otherwise.
- *
- * Some errors that occur in the context of an xcb_connection_t
- * are unrecoverable. When such an error occurs, the
- * connection is shut down and further operations on the
- * xcb_connection_t have no effect.
- *
- * @todo Other functions should document the conditions in
- * which they shut down the connection.
- */
- int xcb_connection_has_error(xcb_connection_t *c);
-
- /**
- * @brief Connects to the X server.
- * @param fd: The file descriptor.
- * @param auth_info: Authentication data.
- * @return A newly allocated xcb_connection_t structure.
- *
- * Connects to an X server, given the open socket @p fd and the
- * xcb_auth_info_t @p auth_info. The file descriptor @p fd is
- * bidirectionally connected to an X server. If the connection
- * should be unauthenticated, @p auth_info must be @c
- * NULL.
- */
- xcb_connection_t *xcb_connect_to_fd(int fd, xcb_auth_info_t *auth_info);
-
- /**
- * @brief Closes the connection.
- * @param c: The connection.
- *
- * Closes the file descriptor and frees all memory associated with the
- * connection @c c.
- */
- void xcb_disconnect(xcb_connection_t *c);
-
-
- /* xcb_util.c */
-
- /**
- * @brief Parses a display string name in the form documented by X(7x).
- * @param name: The name of the display.
- * @param host: A pointer to a malloc'd copy of the hostname.
- * @param display: A pointer to the display number.
- * @param screen: A pointer to the screen number.
- * @return 0 on failure, non 0 otherwise.
- *
- * Parses the display string name @p display_name in the form
- * documented by X(7x). Has no side effects on failure. If
- * @p displayname is @c NULL or empty, it uses the environment
- * variable DISPLAY. @p hostp is a pointer to a newly allocated string
- * that contain the host name. @p displayp is set to the display
- * number and @p screenp to the preferred screen number. @p screenp
- * can be @c NULL. If @p displayname does not contain a screen number,
- * it is set to @c 0.
- */
- int xcb_parse_display(const char *name, char **host, int *display, int *screen);
-
- /**
- * @brief Connects to the X server.
- * @param displayname: The name of the display.
- * @param screenp: A pointer to a preferred screen number.
- * @return A newly allocated xcb_connection_t structure.
- *
- * Connects to the X server specified by @p displayname. If @p
- * displayname is @c NULL, uses the value of the DISPLAY environment
- * variable. If a particular screen on that server is preferred, the
- * int pointed to by @p screenp (if not @c NULL) will be set to that
- * screen; otherwise the screen will be set to 0.
- */
- xcb_connection_t *xcb_connect(const char *displayname, int *screenp);
-
- /**
- * @brief Connects to the X server, using an authorization information.
- * @param display: The name of the display.
- * @param auth: The authorization information.
- * @param screen: A pointer to a preferred screen number.
- * @return A newly allocated xcb_connection_t structure.
- *
- * Connects to the X server specified by @p displayname, using the
- * authorization @p auth. If a particular screen on that server is
- * preferred, the int pointed to by @p screenp (if not @c NULL) will
- * be set to that screen; otherwise @p screenp will be set to 0.
- */
- xcb_connection_t *xcb_connect_to_display_with_auth_info(const char *display, xcb_auth_info_t *auth, int *screen);
-
-
- /* xcb_xid.c */
-
- /**
- * @brief Allocates an XID for a new object.
- * @param c: The connection.
- * @return A newly allocated XID.
- *
- * Allocates an XID for a new object. Typically used just prior to
- * various object creation functions, such as xcb_create_window.
- */
- uint32_t xcb_generate_id(xcb_connection_t *c);
-
-
- /**
- * @}
- */
-
- #ifdef __cplusplus
- }
- #endif
-
-
- #endif /* __XCB_H__ */
-