diff options
| -rwxr-xr-x | ell.c | 27 |
1 files changed, 26 insertions, 1 deletions
@@ -923,6 +923,8 @@ truthy (struct item *item) { && ((item->type == ITEM_STRING && item->len != 0) || item->head); } +static struct item * new_boolean (bool b) { return new_string ("1", b); } + // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - defn (fn_set) { @@ -1137,6 +1139,26 @@ defn (fn_divide) { return check (ctx, (*result = new_number (res))); } +defn (fn_not) { + if (!args) + return set_error (ctx, "missing argument"); + return check (ctx, (*result = new_boolean (!truthy (args)))); +} + +defn (fn_and) { + bool res = true; + for (; args; args = args->next) + res &= truthy (args); + return check (ctx, (*result = new_boolean (res))); +} + +defn (fn_or) { + bool res = false; + for (; args; args = args->next) + res |= truthy (args); + return check (ctx, (*result = new_boolean (res))); +} + // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static bool @@ -1184,7 +1206,10 @@ init_runtime_library (struct context *ctx) { && native_register (ctx, "+", fn_plus) && native_register (ctx, "-", fn_minus) && native_register (ctx, "*", fn_multiply) - && native_register (ctx, "/", fn_divide); + && native_register (ctx, "/", fn_divide) + && native_register (ctx, "not", fn_not) + && native_register (ctx, "and", fn_and) + && native_register (ctx, "or", fn_or); } // --- Main -------------------------------------------------------------------- |