1 files changed, 119 insertions, 0 deletions
diff --git a/files.c b/files.c
new file mode 100644
index 0000000..2db0b17
--- /dev/null
+++ b/files.c
@@ -0,0 +1,119 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+struct file *files = NULL;
+size_t nfiles = 0u;
+size_t current_file = 0u;
+
+void
+free_files(void)
+{
+	while (nfiles) {
+		--nfiles;
+		free(files[nfiles].path);
+		g_clear_object(&files[nfiles].image);
+	}
+	free(files);
+	files = NULL;
+	current_file = 0u;
+}
+
+size_t
+files_from_array(struct file *selected_files, size_t nselected_files)
+{
+	size_t i, n;
+
+	for (i = 0u, n = 0u; i < nselected_files; i++) {
+		selected_files[i].image = NULL;
+		if (load_image(&selected_files[i], 0)) {
+			if (i != n)
+				selected_files[n] = selected_files[i];
+			n += 1u;
+		} else {
+			free(selected_files[i].path);
+		}
+	}
+
+	return n;
+}
+
+size_t
+files_from_list(struct file **files_out, GSList *selected_files)
+{
+	struct file *new_files = NULL;
+	GSList *file;
+	size_t i;
+
+	for (file = selected_files, i = 0u; file; file = file->next)
+		i += 1u;
+	if (!i)
+		goto out;
+	new_files = ecalloc(i, sizeof(*files));
+
+	for (file = selected_files, i = 0u; file; file = file->next) {
+		new_files[i].path = estrdup(file->data);
+		new_files[i].image = NULL;
+		g_free(file->data);
+
+		if (load_image(&new_files[i], 0))
+			i += 1u;
+		else
+			free(new_files[i].path);
+	}
+	g_slist_free(selected_files);
+
+	if (!i) {
+		free(new_files);
+		new_files = NULL;
+	}
+
+out:
+	*files_out = new_files;
+	return i;
+}
+
+int
+set_files_from_argv(int argc, char **argv)
+{
+	int ok = 1;
+	size_t i;
+
+	nfiles = (size_t)argc;
+	if (!nfiles) {
+		files = NULL;
+		return 1;
+	}
+
+	files = ecalloc(nfiles, sizeof(*files));
+	for (i = 0u; i < nfiles; i++) {
+		files[i].path = estrdup(argv[i]);
+		files[i].image = NULL;
+		if (!load_image(&files[i], 1)) {
+			free(files[i].path);
+			ok = 0;
+		}
+	}
+
+	return ok;
+
+}
+
+struct file *
+get_file(void)
+{
+	if (current_file >= nfiles)
+		return NULL;
+	return &files[current_file];
+}
+
+int
+navigate_without_redraw(size_t jump, size_t move)
+{
+	size_t old_file = current_file;
+	if (!nfiles)
+		return 0;
+	current_file = jump;
+	current_file += move;
+	current_file %= nfiles;
+	return current_file != old_file;
+}