--- /dev/null
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <gtk/gtk.h>
+#include <glib/gstdio.h>
+#include "fileref.h"
+#include "magic.h"
+#include "chimara-glk-private.h"
+
+extern ChimaraGlkPrivate *glk_data;
+
+/**
+ * glk_fileref_iterate:
+ * @fref: A file reference, or %NULL.
+ * @rockptr: Return location for the next fileref's rock, or %NULL.
+ *
+ * Iterates through all the existing filerefs. See <link
+ * linkend="chimara-Iterating-Through-Opaque-Objects">Iterating Through Opaque
+ * Objects</link>.
+ *
+ * Returns: the next file reference, or %NULL if there are no more.
+ */
+frefid_t
+glk_fileref_iterate(frefid_t fref, glui32 *rockptr)
+{
+ VALID_FILEREF_OR_NULL(fref, return NULL);
+
+ GList *retnode;
+
+ if(fref == NULL)
+ retnode = glk_data->fileref_list;
+ else
+ retnode = fref->fileref_list->next;
+ frefid_t retval = retnode? (frefid_t)retnode->data : NULL;
+
+ /* Store the fileref's rock in rockptr */
+ if(retval && rockptr)
+ *rockptr = glk_fileref_get_rock(retval);
+
+ return retval;
+}
+
+/**
+ * glk_fileref_get_rock:
+ * @fref: A file reference.
+ *
+ * Retrieves the file reference @fref's rock value. See <link
+ * linkend="chimara-Rocks">Rocks</link>.
+ *
+ * Returns: A rock value.
+ */
+glui32
+glk_fileref_get_rock(frefid_t fref)
+{
+ VALID_FILEREF(fref, return 0);
+ return fref->rock;
+}
+
+/* Internal function: create a fileref using the given parameters. */
+static frefid_t
+fileref_new(gchar *filename, glui32 rock, glui32 usage, glui32 orig_filemode)
+{
+ g_return_val_if_fail(filename != NULL, NULL);
+
+ frefid_t f = g_new0(struct glk_fileref_struct, 1);
+ f->magic = MAGIC_FILEREF;
+ f->rock = rock;
+ f->filename = g_strdup(filename);
+ f->usage = usage;
+ f->orig_filemode = orig_filemode;
+
+ /* Add it to the global fileref list */
+ glk_data->fileref_list = g_list_prepend(glk_data->fileref_list, f);
+ f->fileref_list = glk_data->fileref_list;
+
+ return f;
+}
+
+/**
+ * glk_fileref_create_temp:
+ * @usage: Bitfield with one or more of the <code>fileusage_</code> constants.
+ * @rock: The new fileref's rock value.
+ *
+ * Creates a reference to a temporary file. It is always a new file (one which
+ * does not yet exist). The file (once created) will be somewhere out of the
+ * player's way.
+ *
+ * <note><para>
+ * This is why no name is specified; the player will never need to know it.
+ * </para></note>
+ *
+ * A temporary file should never be used for long-term storage. It may be
+ * deleted automatically when the program exits, or at some later time, say
+ * when the machine is turned off or rebooted. You do not have to worry about
+ * deleting it yourself.
+ *
+ * Returns: A new fileref, or #NULL if the fileref creation failed.
+ */
+frefid_t
+glk_fileref_create_temp(glui32 usage, glui32 rock)
+{
+ /* Get a temp file */
+ GError *error = NULL;
+ gchar *filename = NULL;
+ gint handle = g_file_open_tmp("glkXXXXXX", &filename, &error);
+ if(handle == -1)
+ {
+ WARNING_S("Error creating temporary file", error->message);
+ if(filename)
+ g_free(filename);
+ return NULL;
+ }
+ if(close(handle) == -1) /* There is no g_close() */
+ {
+ IO_WARNING( "Error closing temporary file", filename, g_strerror(errno) );
+ if(filename)
+ g_free(filename);
+ return NULL;
+ }
+
+ frefid_t f = fileref_new(filename, rock, usage, filemode_Write);
+ g_free(filename);
+ return f;
+}
+
+/**
+ * glk_fileref_create_by_prompt:
+ * @usage: Bitfield with one or more of the <code>fileusage_</code> constants.
+ * @fmode: File mode, contolling the dialog's behavior.
+ * @rock: The new fileref's rock value.
+ *
+ * Creates a reference to a file by asking the player to locate it. The library
+ * may simply prompt the player to type a name, or may use a platform-native
+ * file navigation tool. (The prompt, if any, is inferred from the usage
+ * argument.)
+ *
+ * <note><title>Chimara</title>
+ * <para>
+ * Chimara uses a <link
+ * linkend="gtk-GtkFileChooserDialog">GtkFileChooserDialog</link>.
+ * </para></note>
+ *
+ * @fmode must be one of these values:
+ * <variablelist>
+ * <varlistentry>
+ * <term>#filemode_Read</term>
+ * <listitem><para>The file must already exist; and the player will be asked
+ * to select from existing files which match the usage.</para></listitem>
+ * </varlistentry>
+ * <varlistentry>
+ * <term>#filemode_Write</term>
+ * <listitem><para>The file should not exist; if the player selects an
+ * existing file, he will be warned that it will be replaced.
+ * </para></listitem>
+ * </varlistentry>
+ * <varlistentry>
+ * <term>#filemode_ReadWrite</term>
+ * <listitem><para>The file may or may not exist; if it already exists, the
+ * player will be warned that it will be modified.</para></listitem>
+ * </varlistentry>
+ * <varlistentry>
+ * <term>#filemode_WriteAppend</term>
+ * <listitem><para>Same behavior as #filemode_ReadWrite.</para></listitem>
+ * </varlistentry>
+ * </variablelist>
+ *
+ * The @fmode argument should generally match the @fmode which will be used to
+ * open the file.
+ *
+ * <note><para>
+ * It is possible that the prompt or file tool will have a
+ * <quote>cancel</quote> option. If the player chooses this,
+ * glk_fileref_create_by_prompt() will return %NULL. This is a major reason
+ * why you should make sure the return value is valid before you use it.
+ * </para></note>
+ *
+ * Returns: A new fileref, or #NULL if the fileref creation failed or the
+ * dialog was canceled.
+ */
+frefid_t
+glk_fileref_create_by_prompt(glui32 usage, glui32 fmode, glui32 rock)
+{
+ /* TODO: Remember current working directory and last used filename
+ for each usage */
+ GtkWidget *chooser;
+
+ gdk_threads_enter();
+
+ switch(fmode)
+ {
+ case filemode_Read:
+ chooser = gtk_file_chooser_dialog_new("Select a file to open", NULL,
+ GTK_FILE_CHOOSER_ACTION_OPEN,
+ GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+ GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
+ NULL);
+ gtk_file_chooser_set_action(GTK_FILE_CHOOSER(chooser),
+ GTK_FILE_CHOOSER_ACTION_OPEN);
+ break;
+ case filemode_Write:
+ chooser = gtk_file_chooser_dialog_new("Select a file to save to", NULL,
+ GTK_FILE_CHOOSER_ACTION_SAVE,
+ GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+ GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT,
+ NULL);
+ gtk_file_chooser_set_action(GTK_FILE_CHOOSER(chooser),
+ GTK_FILE_CHOOSER_ACTION_SAVE);
+ gtk_file_chooser_set_do_overwrite_confirmation(
+ GTK_FILE_CHOOSER(chooser), TRUE);
+ break;
+ case filemode_ReadWrite:
+ case filemode_WriteAppend:
+ chooser = gtk_file_chooser_dialog_new("Select a file to save to", NULL,
+ GTK_FILE_CHOOSER_ACTION_SAVE,
+ GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
+ GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT,
+ NULL);
+ gtk_file_chooser_set_action(GTK_FILE_CHOOSER(chooser),
+ GTK_FILE_CHOOSER_ACTION_SAVE);
+ break;
+ default:
+ ILLEGAL_PARAM("Unknown file mode: %u", fmode);
+ gdk_threads_leave();
+ return NULL;
+ }
+
+ if(gtk_dialog_run( GTK_DIALOG(chooser) ) != GTK_RESPONSE_ACCEPT)
+ {
+ gtk_widget_destroy(chooser);
+ gdk_threads_leave();
+ return NULL;
+ }
+ gchar *filename =
+ gtk_file_chooser_get_filename( GTK_FILE_CHOOSER(chooser) );
+ frefid_t f = fileref_new(filename, rock, usage, fmode);
+ g_free(filename);
+ gtk_widget_destroy(chooser);
+
+ gdk_threads_leave();
+ return f;
+}
+
+/**
+ * glk_fileref_create_by_name:
+ * @usage: Bitfield with one or more of the <code>fileusage_</code> constants.
+ * @name: A filename.
+ * @rock: The new fileref's rock value.
+ *
+ * This creates a reference to a file with a specific name. The file will be
+ * in a fixed location relevant to your program, and visible to the player.
+ *
+ * <note><para>
+ * This usually means <quote>in the same directory as your program.</quote>
+ * </para></note>
+ * <note><title>Chimara</title>
+ * <para>
+ * In Chimara, the file is created in the current working directory.
+ * </para></note>
+ *
+ * Since filenames are highly platform-specific, you should use
+ * glk_fileref_create_by_name() with care. It is legal to pass any string in the
+ * name argument. However, the library may have to mangle, transform, or
+ * truncate the string to make it a legal native filename.
+ *
+ * <note><para>
+ * For example, if you create two filerefs with the names <quote>File</quote>
+ * and <quote>FILE</quote>, they may wind up pointing to the same file; the
+ * platform may not support case distinctions in file names. Another example:
+ * on a platform where file type is specified by filename suffix, the library
+ * will add an appropriate suffix based on the usage; any suffix in the string
+ * will be overwritten or added to. For that matter, remember that the period
+ * is not a legal character in Acorn filenames...
+ * </para></note>
+ *
+ * The most conservative approach is to pass a string of no more than 8
+ * characters, consisting entirely of upper-case letters and numbers, starting
+ * with a letter. You can then be reasonably sure that the resulting filename
+ * will display all the characters you specify — in some form.
+ *
+ * Returns: A new fileref, or %NULL if the fileref creation failed.
+ */
+frefid_t
+glk_fileref_create_by_name(glui32 usage, char *name, glui32 rock)
+{
+ g_return_val_if_fail(name != NULL && strlen(name) > 0, NULL);
+
+ /* Find out what encoding filenames are in */
+ const gchar **charsets; /* Do not free */
+ g_get_filename_charsets(&charsets);
+
+ /* Convert name to that encoding */
+ GError *error = NULL;
+ gchar *osname = g_convert(name, -1, charsets[0], "ISO-8859-1", NULL, NULL,
+ &error);
+ if(osname == NULL)
+ {
+ WARNING_S("Error during latin1->filename conversion", error->message);
+ return NULL;
+ }
+
+ /* Do any string-munging here to remove illegal characters from filename.
+ On ext3, the only illegal characters are '/' and '\0'. TODO: Should this
+ function be allowed to reference files in other directories, or should we
+ disallow '/'? */
+
+ frefid_t f = fileref_new(osname, rock, usage, filemode_ReadWrite);
+ g_free(osname);
+ return f;
+}
+
+/**
+ * glk_fileref_create_from_fileref:
+ * @usage: Bitfield with one or more of the <code>fileusage_</code> constants.
+ * @fref: Fileref to copy.
+ * @rock: The new fileref's rock value.
+ *
+ * This copies an existing file reference @fref, but changes the usage. (The
+ * original fileref is not modified.)
+ *
+ * The use of this function can be tricky. If you change the type of the fileref
+ * (#fileusage_Data, #fileusage_SavedGame, etc), the new reference may or may
+ * not point to the same actual disk file.
+ *
+ * <note><para>
+ * This generally depends on whether the platform uses suffixes to indicate
+ * file type.
+ * </para></note>
+ *
+ * If you do this, and open both file references for writing, the results are
+ * unpredictable. It is safest to change the type of a fileref only if it refers
+ * to a nonexistent file.
+ *
+ * If you change the mode of a fileref (#fileusage_TextMode,
+ * #fileusage_BinaryMode), but leave the rest of the type unchanged, the new
+ * fileref will definitely point to the same disk file as the old one.
+ *
+ * Obviously, if you write to a file in text mode and then read from it in
+ * binary mode, the results are platform-dependent.
+ *
+ * Returns: A new fileref, or %NULL if the fileref creation failed.
+ */
+frefid_t
+glk_fileref_create_from_fileref(glui32 usage, frefid_t fref, glui32 rock)
+{
+ VALID_FILEREF(fref, return NULL);
+ return fileref_new(fref->filename, rock, usage, fref->orig_filemode);
+}
+
+/**
+ * glk_fileref_destroy:
+ * @fref: Fileref to destroy.
+ *
+ * Destroys a fileref which you have created. This does <emphasis>not</emphasis>
+ * affect the disk file; it just reclaims the resources allocated by the
+ * <code>glk_fileref_create...</code> function.
+ *
+ * It is legal to destroy a fileref after opening a file with it (while the
+ * file is still open.) The fileref is only used for the opening operation,
+ * not for accessing the file stream.
+ */
+void
+glk_fileref_destroy(frefid_t fref)
+{
+ VALID_FILEREF(fref, return);
+
+ glk_data->fileref_list = g_list_delete_link(glk_data->fileref_list, fref->fileref_list);
+ if(fref->filename)
+ g_free(fref->filename);
+
+ fref->magic = MAGIC_FREE;
+ g_free(fref);
+}
+
+/**
+ * glk_fileref_delete_file:
+ * @fref: A refrence to the file to delete.
+ *
+ * Deletes the file referred to by @fref. It does not destroy @fref itself.
+ */
+void
+glk_fileref_delete_file(frefid_t fref)
+{
+ VALID_FILEREF(fref, return);
+ if( glk_fileref_does_file_exist(fref) )
+ if(g_unlink(fref->filename) == -1)
+ IO_WARNING( "Error deleting file", fref->filename, g_strerror(errno) );
+}
+
+/**
+ * glk_fileref_does_file_exist:
+ * @fref: A fileref to check.
+ *
+ * Checks whether the file referred to by @fref exists.
+ *
+ * Returns: %TRUE (1) if @fref refers to an existing file, and %FALSE (0) if
+ * not.
+ */
+glui32
+glk_fileref_does_file_exist(frefid_t fref)
+{
+ VALID_FILEREF(fref, return 0);
+ if( g_file_test(fref->filename, G_FILE_TEST_EXISTS) )
+ return 1;
+ return 0;
+}
+
projects / projects / chimara / chimara.git / blobdiff