1 /* -*- Mode: C; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 3 -*- */ 2 3 /* 4 * GImageView 5 * Copyright (C) 2001 Takuro Ashie 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 20 * 21 * $Id: gimv_io.h,v 1.5 2004/09/21 08:44:32 makeinu Exp $ 22 */ 23 24 #ifndef __GIMV_IO__ 25 #define __GIMV_IO__ 26 27 #ifdef HAVE_CONFIG_H 28 # include "config.h" 29 #endif 30 31 #include <stdio.h> 32 #include <sys/types.h> 33 #include <sys/stat.h> 34 #include <fcntl.h> 35 #include <glib.h> 36 37 38 typedef struct GimvIO_Tag GimvIO; 39 typedef struct GimvIOFuncs_Tag GimvIOFuncs; 40 typedef struct GimvIOPlugin_Tag GimvIOPlugin; 41 42 43 typedef enum 44 { 45 GIMV_IO_STATUS_NORMAL, 46 GIMV_IO_STATUS_ERROR, 47 GIMV_IO_STATUS_EOF, 48 GIMV_IO_STATUS_AGAIN 49 } GimvIOStatus; 50 51 52 struct GimvIO_Tag 53 { 54 GimvIOFuncs *funcs; 55 gchar *url; 56 gint ref_count; 57 }; 58 59 60 struct GimvIOFuncs_Tag 61 { 62 GimvIOStatus (*read) (GimvIO *gio, 63 gchar *buf, 64 guint count, 65 guint *bytes_read); 66 GimvIOStatus (*write) (GimvIO *gio, 67 const gchar *buf, 68 guint count, 69 guint *bytes_written); 70 GimvIOStatus (*seek) (GimvIO *gio, 71 glong offset, 72 gint whence); 73 GimvIOStatus (*tell) (GimvIO *gio, 74 glong *offset); 75 void (*close) (GimvIO *gio); 76 }; 77 78 79 #define GIMV_IO_IF_VERSION 1 80 81 typedef GimvIO *(*GimvIONewFn) (const gchar *url, 82 const gchar *mode); 83 84 #define GIMV_IO_PLUGIN_PRIORITY_DEFAULT 0 85 86 87 struct GimvIOPlugin_Tag 88 { 89 const guint32 if_version; /* plugin interface version */ 90 const gchar * const id; 91 gint priority_hint; 92 GimvIONewFn new_func; 93 }; 94 95 96 void gimv_io_init (GimvIO *gio, 97 const gchar *url); 98 GimvIO *gimv_io_new (const gchar *url, 99 const gchar *mode); 100 GimvIO *gimv_io_ref (GimvIO *gio); 101 void gimv_io_unref (GimvIO *gio); 102 GimvIOStatus gimv_io_read (GimvIO *gio, 103 gchar *buf, 104 guint count, 105 guint *bytes_read); 106 GimvIOStatus gimv_io_write (GimvIO *gio, 107 const gchar *buf, 108 guint count, 109 guint *bytes_written); 110 GimvIOStatus gimv_io_seek (GimvIO *gio, 111 glong offset, 112 gint whence); 113 GimvIOStatus gimv_io_tell (GimvIO *gio, 114 glong *offset); 115 void gimv_io_close (GimvIO *gio); 116 117 118 gint gimv_io_getc (GimvIO *gio, 119 GimvIOStatus *status); 120 GimvIOStatus gimv_io_fgets (GimvIO *gio, 121 gchar *buf, 122 guint count); 123 124 /* for plugin loader */ 125 gboolean gimv_io_plugin_regist (const gchar *plugin_name, 126 const gchar *module_name, 127 gpointer impl, 128 gint size); 129 130 #endif /* __GIMV_IO__ */ 131