big refactor for command functionality

src/execute.c

@@ -0,0 +1,82 @@
+/*
+ * Toxic -- Tox Curses Client
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "toxic_windows.h"
+#include "global_commands.h"
+#include "chat_commands.h"
+#include "execute.h"
+
+static int parse_command(WINDOW *window, char *cmd, char (*args)[MAX_STR_SIZE])
+{
+    int num_args = 0;
+    bool cmd_end = false;    // flags when we get to the end of cmd
+    char *end;               // points to the end of the current arg
+
+    /* Put arguments into args array (characters wrapped in double quotes count as one arg) */
+    while (!cmd_end && num_args < MAX_NUM_ARGS) {
+        if (*cmd == '\"') {
+            end = strchr(cmd+1, '\"');
+
+            if (end++ == NULL) {    /* Increment past the end quote */
+                wprintw(window, "Invalid argument. Did you forget a closing \"?\n");
+                return;
+            }
+
+            cmd_end = *end == '\0';
+        } else {
+            end = strchr(cmd, ' ');
+            cmd_end = end == NULL;
+        }
+
+        if (!cmd_end)
+            *end++ = '\0';    /* mark end of current argument */
+
+        /* Copy from start of current arg to where we just inserted the null byte */
+        strcpy(args[num_args++], cmd);
+        cmd = end;
+    }
+
+    return num_args;
+}
+
+void execute(WINDOW *window, ToxWindow *prompt, Tox *m, char *cmd, int mode)
+{
+    if (string_is_empty(cmd))
+        return;
+
+    char args[MAX_NUM_ARGS][MAX_STR_SIZE] = {0};
+    int num_args = parse_command(window, cmd, args);
+
+    /* Attempt to match input to command functions. If non-global command mode is specified, 
+       try the specified mode's commands first, then upon failure try global commands.
+
+       TODO: Generalize command matching loop in a separate function */
+    int i;
+
+    switch(mode) {
+    case CHAT_COMMAND_MODE:
+        for (i = 0; i < CHAT_NUM_COMMANDS; ++i) {
+            if (strcmp(args[0], chat_commands[i].name) == 0) {
+                (chat_commands[i].func)(window, prompt, m, num_args-1, args);
+                return;
+            }
+        }
+        break;
+
+    case GROUPCHAT_COMMAND_MODE:
+        break;
+    }
+
+    for (i = 0; i < GLOBAL_NUM_COMMANDS; ++i) {
+        if (strcmp(args[0], global_commands[i].name) == 0) {
+            (global_commands[i].func)(window, prompt, m, num_args-1, args);
+            return;
+        }
+    }
+
+    wprintw(window, "Invalid command.\n");
+}