Add basic command system

1 files changed, 64 insertions, 0 deletions

diff --git a/src/commands.c b/src/commands.c
new file mode 100644
index 0000000..9b93933
--- /dev/null
+++ b/src/commands.c
@@ -0,0 +1,64 @@
+/* Copyright (c) 2017 imv authors
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+*/
+
+#include "commands.h"
+#include "list.h"
+
+struct imv_command {
+  const char* command;
+  void (*handler)(struct imv_list *args);
+};
+
+struct imv_list *g_commands = NULL;
+
+void imv_command_register(const char *command, void (*handler)())
+{
+  if(!g_commands) {
+    g_commands = imv_list_create();
+  }
+
+  struct imv_command *cmd = malloc(sizeof(struct imv_command));
+  cmd->command = strdup(command);
+  cmd->handler = handler;
+  imv_list_append(g_commands, cmd);
+}
+
+int imv_command_exec(const char *command)
+{
+  if(!g_commands) {
+    return 1;
+  }
+
+  struct imv_list *args = imv_split_string(command, ' ');
+  int ret = 1;
+
+  if(args->len > 0) {
+    for(size_t i = 0; i < g_commands->len; ++i) {
+      struct imv_command *cmd = g_commands->items[i];
+      if(!strcmp(cmd->command, args->items[0])) {
+        cmd->handler(args);
+        ret = 0;
+        break;
+      }
+    }
+  }
+
+  imv_list_deep_free(args);
+  return ret;
+}
+
+/* vim:set ts=2 sts=2 sw=2 et: */