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Builtin function 'length', for arrays/objects/strings.

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Stephen Dolan committed 2012-09-16 11:08:42 +01:00
1 parent cc2fb20ca0
commit 539156430a
2 files changed
+18
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c/builtin.c
+15
View File
@@ -129,6 +129,20 @@ static void f_tonumber(jv input[], jv output[]) {
}
}
static void f_length(jv input[], jv output[]) {
if (jv_get_kind(input[0]) == JV_KIND_ARRAY) {
output[0] = jv_number(jv_array_length(input[0]));
} else if (jv_get_kind(input[0]) == JV_KIND_OBJECT) {
output[0] = jv_number(jv_object_length(input[0]));
} else if (jv_get_kind(input[0]) == JV_KIND_STRING) {
output[0] = jv_number(jv_string_length(input[0]));
} else {
output[0] = jv_invalid_with_msg(jv_string_fmt("Cannot get the length of %s",
jv_kind_name(jv_get_kind(input[0]))));
jv_free(input[0]);
}
}
struct cfunction function_list[] = {
{f_true, "true", CALL_BUILTIN_1_1},
{f_false, "false", CALL_BUILTIN_1_1},
@@ -139,5 +153,6 @@ struct cfunction function_list[] = {
{f_divide, "_divide", CALL_BUILTIN_3_1},
{f_tonumber, "tonumber", CALL_BUILTIN_1_1},
{f_equal, "_equal", CALL_BUILTIN_3_1},
{f_length, "length", CALL_BUILTIN_1_1},
};
struct symbol_table builtins = {function_list, sizeof(function_list)/sizeof(function_list[0])};
c/testdata
+3
View File
@@ -203,6 +203,9 @@ null
[false, false, false, false, false, false, false, true, false]
[false, false, false, false, false, false, false, false, true ]
[.[] | length]
[[], {}, [1,2], {"a":42}, "asdf"]
[0, 0, 2, 1, 4]
#
# User-defined functions