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patch 8.2.0918: duplicate code for evaluating expression argument

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Problem:    Duplicate code for evaluating expression argument.
Solution:   Merge the code and make the use more flexible.
This commit is contained in:
Bram Moolenaar
2020-06-07 14:50:50 +02:00
parent e928366de5
commit a9c0104947
7 changed files with 28 additions and 121 deletions
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75
src/evalvars.c
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@@ -3811,79 +3811,4 @@ free_callback(callback_T *callback)
callback->cb_name = NULL;
}
/*
* Process a function argument that can be a string expression or a function
* reference.
* "tv" must remain valid until calling evalarg_clean()!
* Returns FAIL when the argument is invalid.
*/
int
evalarg_get(typval_T *tv, evalarg_T *eva)
{
if (tv->v_type == VAR_STRING
|| tv->v_type == VAR_NUMBER
|| tv->v_type == VAR_BOOL
|| tv->v_type == VAR_SPECIAL)
{
eva->eva_string = tv_get_string_buf(tv, eva->eva_buf);
return OK;
}
eva->eva_callback = get_callback(tv);
return eva->eva_callback.cb_name == NULL ? FAIL : OK;
}
/*
* Return whether "eva" has a valid expression or callback.
*/
int
evalarg_valid(evalarg_T *eva)
{
return eva->eva_string != NULL || eva->eva_callback.cb_name != NULL;
}
/*
* Invoke the expression or callback "eva" and return the result in "tv".
* Returns FAIL if something failed
*/
int
evalarg_call(evalarg_T *eva, typval_T *tv)
{
typval_T argv[1];
if (eva->eva_string != NULL)
return eval0(eva->eva_string, tv, NULL, EVAL_EVALUATE);
argv[0].v_type = VAR_UNKNOWN;
return call_callback(&eva->eva_callback, -1, tv, 0, argv);
}
/*
* Like evalarg_call(), but just return TRUE of FALSE.
* Sets "error" to TRUE if evaluation failed.
*/
int
evalarg_call_bool(evalarg_T *eva, int *error)
{
typval_T tv;
int r;
if (evalarg_call(eva, &tv) == FAIL)
{
*error = TRUE;
return FALSE;
}
r = tv_get_number(&tv);
clear_tv(&tv);
*error = FALSE;
return r;
}
void
evalarg_clean(evalarg_T *eva)
{
if (eva->eva_string == NULL)
free_callback(&eva->eva_callback);
}
#endif // FEAT_EVAL