factor script_command argv allocation

Splits argument allocation out from script command, reusing free() code.

diff --git a/src/helper/command.c b/src/helper/command.c
index ba689b005eec48ddbc5a31ddb2f7b9b048381313..ba28784da3cf604f53ff23e160cb0fcabe3fe570 100644 (file)
--- a/src/helper/command.c
+++ b/src/helper/command.c
@@ -75,15 +75,45 @@ void script_debug(Jim_Interp *interp, const char *name,
        }
 }
 
+static void script_command_args_free(const char **words, unsigned nwords)
+{
+       for (unsigned i = 0; i < nwords; i++)
+               free((void *)words[i]);
+       free(words);
+}
+static const char **script_command_args_alloc(
+               unsigned argc, Jim_Obj *const *argv, unsigned *nwords)
+{
+       const char **words = malloc(argc * sizeof(char *));
+       if (NULL == words)
+               return NULL;
+
+       unsigned i;
+       for (i = 0; i < argc; i++)
+       {
+               int len;
+               const char *w = Jim_GetString(argv[i], &len);
+               /* a comment may end the line early */
+               if (*w == '#')
+                       break;
+
+               words[i] = strdup(w);
+               if (words[i] == NULL)
+               {
+                       script_command_args_free(words, i);
+                       return NULL;
+               }
+       }
+       *nwords = i;
+       return words;
+}
+
 static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 {
        /* the private data is stashed in the interp structure */
        struct command *c;
        struct command_context *context;
        int retval;
-       int i;
-       int nwords;
-       char **words;
 
        /* DANGER!!!! be careful what we invoke here, since interp->cmdPrivData might
         * get overwritten by running other Jim commands! Treat it as an
@@ -101,27 +131,10 @@ static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
 
        script_debug(interp, c->name, argc, argv);
 
-       words = malloc(argc * sizeof(char *));
-       for (i = 0; i < argc; i++)
-       {
-               int len;
-               const char *w = Jim_GetString(argv[i], &len);
-               if (*w=='#')
-               {
-                       /* hit an end of line comment */
-                       break;
-               }
-               words[i] = strdup(w);
-               if (words[i] == NULL)
-               {
-                       int j;
-                       for (j = 0; j < i; j++)
-                               free(words[j]);
-                       free(words);
-                       return JIM_ERR;
-               }
-       }
-       nwords = i;
+       unsigned nwords;
+       const char **words = script_command_args_alloc(argc, argv, &nwords);
+       if (NULL == words)
+               return JIM_ERR;
 
        /* grab the command context from the associated data */
        context = Jim_GetAssocData(interp, "context");
@@ -148,9 +161,7 @@ static int script_command(Jim_Interp *interp, int argc, Jim_Obj *const *argv)
        Jim_SetResult(interp, tclOutput);
        Jim_DecrRefCount(interp, tclOutput);
 
-       for (i = 0; i < nwords; i++)
-               free(words[i]);
-       free(words);
+       script_command_args_free(words, nwords);
 
        int *return_retval = Jim_GetAssocData(interp, "retval");
        if (return_retval != NULL)