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Implement the 'add' builtin promised by the docs' examples.

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This commit is contained in:
Stephen Dolan
2012-09-18 23:32:24 +01:00
parent fbf7bc835b
commit 5863160112
3 changed files with 61 additions and 0 deletions
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20
builtin.c
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@@ -90,6 +90,25 @@ static void f_divide(jv input[], jv output[]) {
}
}
static void f_add(jv input[], jv output[]) {
jv array = input[0];
if (jv_get_kind(array) != JV_KIND_ARRAY) {
output[0] = jv_invalid_with_msg(jv_string_fmt("Cannot add elements of an %s",
jv_kind_name(jv_get_kind(array))));
} else if (jv_array_length(jv_copy(array)) == 0) {
output[0] = jv_null();
} else {
jv sum = jv_array_get(jv_copy(array), 0);
for (int i = 1; i < jv_array_length(jv_copy(array)); i++) {
jv x = jv_array_get(jv_copy(array), i);
jv add_args[] = {jv_null(), x, sum};
f_plus(add_args, &sum);
}
output[0] = sum;
}
jv_free(array);
}
static void f_equal(jv input[], jv output[]) {
jv_free(input[0]);
output[0] = jv_bool(jv_equal(input[2], input[1]));
@@ -185,6 +204,7 @@ static struct cfunction function_list[] = {
{f_equal, "_equal", CALL_BUILTIN_3_1},
{f_length, "length", CALL_BUILTIN_1_1},
{f_type, "type", CALL_BUILTIN_1_1},
{f_add, "add", CALL_BUILTIN_1_1},
};
static struct symbol_table cbuiltins = {function_list, sizeof(function_list)/sizeof(function_list[0])};