| 1 | ;; Common Lisp bindings for GTK+ 2.x |
| 2 | ;; Copyright 2008 Espen S. Johnsen <espen@users.sf.net> |
| 3 | ;; |
| 4 | ;; Permission is hereby granted, free of charge, to any person obtaining |
| 5 | ;; a copy of this software and associated documentation files (the |
| 6 | ;; "Software"), to deal in the Software without restriction, including |
| 7 | ;; without limitation the rights to use, copy, modify, merge, publish, |
| 8 | ;; distribute, sublicense, and/or sell copies of the Software, and to |
| 9 | ;; permit persons to whom the Software is furnished to do so, subject to |
| 10 | ;; the following conditions: |
| 11 | ;; |
| 12 | ;; The above copyright notice and this permission notice shall be |
| 13 | ;; included in all copies or substantial portions of the Software. |
| 14 | ;; |
| 15 | ;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 16 | ;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 17 | ;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | ;; IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY |
| 19 | ;; CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 20 | ;; TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 21 | ;; SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 22 | |
| 23 | ;; $Id: streams.lisp,v 1.1 2008-12-10 02:58:13 espen Exp $ |
| 24 | |
| 25 | |
| 26 | (in-package "GIO") |
| 27 | |
| 28 | (use-prefix "g") |
| 29 | |
| 30 | ;;; Input streams |
| 31 | |
| 32 | (defbinding input-stream-read (stream buffer &key length cancellable) gssize |
| 33 | (stream input-stream) |
| 34 | (buffer pointer) |
| 35 | (length gsize) |
| 36 | (cancellable (or null cancellable)) |
| 37 | (nil gerror-signal :out)) |
| 38 | |
| 39 | (defbinding input-stream-read-all (stream buffer &key length cancellable) boolean |
| 40 | (stream input-stream) |
| 41 | (buffer pointer) |
| 42 | (length gsize) |
| 43 | (bytes-read gsize :out) |
| 44 | (cancellable (or null cancellable)) |
| 45 | (nil gerror-signal :out)) |
| 46 | |
| 47 | (defbinding input-stream-skip (stream length &key cancellable) gssize |
| 48 | (stream input-stream) |
| 49 | (length gsize) |
| 50 | (cancellable (or null cancellable)) |
| 51 | (nil gerror-signal :out)) |
| 52 | |
| 53 | (defbinding input-stream-close (stream &key cancellable) boolean |
| 54 | (stream input-stream) |
| 55 | (cancellable (or null cancellable)) |
| 56 | (nil gerror-signal :out)) |
| 57 | |
| 58 | |
| 59 | ;;; Output streams |
| 60 | |
| 61 | (defbinding output-stream-write (stream buffer &key length cancellable) gssize |
| 62 | (stream output-stream) |
| 63 | (buffer (or (unboxed-vector (unsigned-byte 8)) pointer)) |
| 64 | ((or length (length buffer)) gsize) |
| 65 | (cancellable (or null cancellable)) |
| 66 | (nil gerror-signal :out)) |
| 67 | |
| 68 | (defbinding output-stream-write-all (stream buffer &key length cancellable) boolean |
| 69 | (stream output-stream) |
| 70 | (buffer (or (unboxed-vector (unsigned-byte 8)) pointer)) |
| 71 | ((or length (length buffer)) gsize) |
| 72 | (bytes-written gsize :out) |
| 73 | (cancellable (or null cancellable)) |
| 74 | (nil gerror-signal :out)) |
| 75 | |
| 76 | (defbinding output-stream-flush (stream &key cancellable) boolean |
| 77 | (stream output-stream) |
| 78 | (cancellable (or null cancellable)) |
| 79 | (nil gerror-signal :out)) |
| 80 | |
| 81 | (defbinding output-stream-close (stream &key cancellable) boolean |
| 82 | (stream output-stream) |
| 83 | (cancellable (or null cancellable)) |
| 84 | (nil gerror-signal :out)) |
| 85 | |
| 86 | |
| 87 | ;;; Unix streams |
| 88 | |
| 89 | (defbinding %unix-input-stream-new () pointer |
| 90 | (fd int) |
| 91 | (close-fd-p boolean)) |
| 92 | |
| 93 | (defmethod allocate-foreign ((stream unix-input-stream) &key fd close-fd) |
| 94 | (%unix-input-stream-new fd close-fd)) |
| 95 | |
| 96 | (defbinding %unix-output-stream-new () pointer |
| 97 | (fd int) |
| 98 | (close-fd-p boolean)) |
| 99 | |
| 100 | (defmethod allocate-foreign ((stream unix-output-stream) &key fd close-fd) |
| 101 | (%unix-output-stream-new fd close-fd)) |
| 102 | |
| 103 | |
| 104 | ;;; Callback streams (clg extension) |
| 105 | |
| 106 | (define-callback callback-stream-read-func gssize |
| 107 | ((buffer pointer) (count gsize) (cancellable (or null cancellable)) |
| 108 | (gerror pointer) (stream-id pointer-data)) |
| 109 | (declare (ignore cancellable)) |
| 110 | (handler-case |
| 111 | (let* ((sequence (make-array count :element-type '(unsigned-byte 8))) |
| 112 | (stream (find-user-data stream-id)) |
| 113 | (bytes-read (read-sequence sequence stream))) |
| 114 | (unless (null-pointer-p buffer) |
| 115 | (make-c-vector '(unsigned-byte 8) bytes-read |
| 116 | :content sequence :location buffer)) |
| 117 | bytes-read) |
| 118 | (serious-condition (condition) |
| 119 | (gerror-set-in-callback gerror (file-error-domain) |
| 120 | (enum-int :failed 'file-error-enum) (princ-to-string condition)) |
| 121 | -1))) |
| 122 | |
| 123 | (define-callback callback-stream-write-func gssize |
| 124 | ((buffer pointer) (count gsize) (cancellable (or null cancellable)) |
| 125 | (gerror pointer) (stream-id pointer-data)) |
| 126 | (declare (ignore cancellable)) |
| 127 | (handler-case |
| 128 | (let ((stream (find-user-data stream-id))) |
| 129 | (write-sequence |
| 130 | (map-c-vector 'vector 'identity buffer '(unsigned-byte 8) count) |
| 131 | stream)) |
| 132 | (serious-condition (condition) |
| 133 | (gerror-set-in-callback gerror (file-error-domain) |
| 134 | (enum-int :failed 'file-error-enum) (princ-to-string condition)) |
| 135 | -1))) |
| 136 | |
| 137 | (define-callback callback-stream-flush-func boolean |
| 138 | ((cancellable (or null cancellable)) (gerror pointer) |
| 139 | (stream-id pointer-data)) |
| 140 | (declare (ignore cancellable)) |
| 141 | (handler-case (force-output (find-user-data stream-id)) |
| 142 | (serious-condition (condition) |
| 143 | (gerror-set-in-callback gerror (file-error-domain) |
| 144 | (enum-int :failed 'file-error-enum) (princ-to-string condition)) |
| 145 | -1))) |
| 146 | |
| 147 | (define-callback callback-stream-close-func boolean |
| 148 | ((cancellable (or null cancellable)) gerror (stream-id pointer-data)) |
| 149 | (declare (ignore cancellable gerror)) |
| 150 | (destroy-user-data stream-id)) |
| 151 | |
| 152 | (defbinding %callback-input-stream-new (stream-id) pointer |
| 153 | (callback-stream-read-func callback) |
| 154 | (callback-stream-close-func callback) |
| 155 | (stream-id pointer-data)) |
| 156 | |
| 157 | (defbinding %callback-output-stream-new (stream-id) pointer |
| 158 | (callback-stream-read-func callback) |
| 159 | (callback-stream-flush-func callback) |
| 160 | (callback-stream-close-func callback) |
| 161 | (stream-id pointer-data)) |
| 162 | |
| 163 | (defmethod allocate-foreign ((stream callback-input-stream) &key base-stream) |
| 164 | (%callback-input-stream-new (register-user-data base-stream))) |
| 165 | |
| 166 | (defmethod allocate-foreign ((stream callback-output-stream) &key base-stream) |
| 167 | (%callback-input-stream-new (register-user-data base-stream))) |
| 168 | |
| 169 | |
| 170 | ;;; Lisp integration |
| 171 | |
| 172 | (deftype input-stream-designator () '(or stream input-stream integer)) |
| 173 | (deftype output-stream-designator () '(or stream input-stream integer)) |
| 174 | |
| 175 | (define-type-method alien-type ((type input-stream-designator)) |
| 176 | (declare (ignore type)) |
| 177 | (alien-type 'input-stream)) |
| 178 | |
| 179 | (define-type-method alien-arg-wrapper ((type input-stream-designator) var stream style form &optional copy-in-p) |
| 180 | (declare (ignore type)) |
| 181 | (let ((%stream (make-symbol "STREAM"))) |
| 182 | `(let ((,%stream (etypecase ,stream |
| 183 | (input-stream ,stream) |
| 184 | (integer (make-instance 'unix-input-stream :fd ,stream)) |
| 185 | (stream (make-instance 'callback-input-stream |
| 186 | :base-stream ,stream))))) |
| 187 | (unwind-protect |
| 188 | ,(alien-arg-wrapper 'input-stream var %stream style form copy-in-p) |
| 189 | (unless (typep ,stream 'input-stream) |
| 190 | (input-stream-close ,%stream)))))) |
| 191 | |
| 192 | (define-type-method alien-type ((type output-stream-designator)) |
| 193 | (declare (ignore type)) |
| 194 | (alien-type 'output-stream)) |
| 195 | |
| 196 | (define-type-method alien-arg-wrapper ((type output-stream-designator) var stream style form &optional copy-in-p) |
| 197 | (declare (ignore type)) |
| 198 | (let ((%stream (make-symbol "STREAM"))) |
| 199 | `(let ((,%stream (etypecase ,stream |
| 200 | (output-stream ,stream) |
| 201 | (integer (make-instance 'unix-output-stream :fd ,stream)) |
| 202 | (stream (make-instance 'callback-output-stream |
| 203 | :base-stream ,stream))))) |
| 204 | (unwind-protect |
| 205 | ,(alien-arg-wrapper 'input-stream var %stream style form copy-in-p) |
| 206 | (unless (typep ,stream 'output-stream) |
| 207 | (output-stream-close ,%stream)))))) |
| 208 | |
| 209 | ;; TODO: make GIO streams appear as Lisp streams |