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v/vlib/toml/any.v
2021-11-24 20:39:22 +02:00

229 lines
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V

// Copyright (c) 2021 Lars Pontoppidan. All rights reserved.
// Use of this source code is governed by an MIT license
// that can be found in the LICENSE file.
module toml
// Pretty much all the same builtin types as the `json2.Any` type plus `DateTime`,`Date`,`Time`
pub type Any = Date
| DateTime
| Null
| Time
| []Any
| bool
| f32
| f64
| i64
| int
| map[string]Any
| string
| u64
// string returns `Any` as a string.
pub fn (a Any) string() string {
match a {
// NOTE if `.clone()` is not used here:
// string { return a as string }
// ... certain call-patterns to this function will cause a memory corruption.
// See `tests/toml_memory_corruption_test.v` for a matching regression test.
string { return (a as string).clone() }
DateTime { return a.str().clone() }
Date { return a.str().clone() }
Time { return a.str().clone() }
else { return a.str().clone() }
}
}
// int returns `Any` as an 32-bit integer.
pub fn (a Any) int() int {
match a {
int { return a }
i64, f32, f64, bool { return int(a) }
// time.Time { return int(0) } // TODO
else { return 0 }
}
}
// i64 returns `Any` as a 64-bit integer.
pub fn (a Any) i64() i64 {
match a {
i64 { return a }
int, f32, f64, bool { return i64(a) }
// time.Time { return i64(0) } // TODO
else { return 0 }
}
}
// u64 returns `Any` as a 64-bit unsigned integer.
pub fn (a Any) u64() u64 {
match a {
u64 { return a }
int, i64, f32, f64, bool { return u64(a) }
// time.Time { return u64(0) } // TODO
else { return 0 }
}
}
// f32 returns `Any` as a 32-bit float.
pub fn (a Any) f32() f32 {
match a {
f32 { return a }
int, i64, f64 { return f32(a) }
// time.Time { return f32(0) } // TODO
else { return 0.0 }
}
}
// f64 returns `Any` as a 64-bit float.
pub fn (a Any) f64() f64 {
match a {
f64 { return a }
int, i64, f32 { return f64(a) }
// time.Time { return f64(0) } // TODO
else { return 0.0 }
}
}
// array returns `Any` as an array.
pub fn (a Any) array() []Any {
if a is []Any {
return a
} else if a is map[string]Any {
mut arr := []Any{}
for _, v in a {
arr << v
}
return arr
}
return [a]
}
// as_map returns `Any` as a map (TOML table).
pub fn (a Any) as_map() map[string]Any {
if a is map[string]Any {
return a
} else if a is []Any {
mut mp := map[string]Any{}
for i, fi in a {
mp['$i'] = fi
}
return mp
}
return {
'0': a
}
}
// bool returns `Any` as a boolean.
pub fn (a Any) bool() bool {
match a {
bool { return a }
string { return a.bool() }
else { return false }
}
}
// date returns `Any` as a `toml.Date` struct.
pub fn (a Any) date() Date {
match a {
// string { } // TODO
// NOTE `.clone()` is to avoid memory corruption see `pub fn (a Any) string() string`
Date { return Date{a.str().clone()} }
else { return Date{''} }
}
}
// time returns `Any` as a `toml.Time` struct.
pub fn (a Any) time() Time {
match a {
// string { } // TODO
// NOTE `.clone()` is to avoid memory corruption see `pub fn (a Any) string() string`
Time { return Time{a.str().clone()} }
else { return Time{''} }
}
}
// datetime returns `Any` as a `toml.DateTime` struct.
pub fn (a Any) datetime() DateTime {
match a {
// string { } // TODO
// NOTE `.clone()` is to avoid memory corruption see `pub fn (a Any) string() string`
DateTime { return DateTime{a.str().clone()} }
else { return DateTime{''} }
}
}
// default_to returns `value` if `a Any` is `Null`.
// This can be used to set default values when retrieving
// values. E.g.: `toml_doc.value('wrong.key').default_to(123).int()`
pub fn (a Any) default_to(value Any) Any {
match a {
Null { return value }
else { return a }
}
}
// value queries a value from the map.
// `key` supports a small query syntax scheme:
// Maps can be queried in "dotted" form e.g. `a.b.c`.
// quoted keys are supported as `a."b.c"` or `a.'b.c'`.
// Arrays can be queried with `a[0].b[1].[2]`.
pub fn (m map[string]Any) value(key string) Any {
return Any(m).value(key)
}
// value queries a value from the array.
// `key` supports a small query syntax scheme:
// The array can be queried with `[0].b[1].[2]`.
// Maps can be queried in "dotted" form e.g. `a.b.c`.
// quoted keys are supported as `a."b.c"` or `a.'b.c'`.
pub fn (a []Any) value(key string) Any {
return Any(a).value(key)
}
pub fn (a []Any) as_strings() []string {
mut sa := []string{}
for any in a {
sa << any.string()
}
return sa
}
// value queries a value from the `Any` type.
// `key` supports a small query syntax scheme:
// Maps can be queried in "dotted" form e.g. `a.b.c`.
// quoted keys are supported as `a."b.c"` or `a.'b.c'`.
// Arrays can be queried with `a[0].b[1].[2]`.
pub fn (a Any) value(key string) Any {
key_split := parse_dotted_key(key) or { return Any(Null{}) }
return a.value_(a, key_split)
}
// value_ returns the `Any` value found at `key`.
fn (a Any) value_(value Any, key []string) Any {
assert key.len > 0
mut any_value := Any(Null{})
k, index := parse_array_key(key[0])
if k == '' {
arr := value as []Any
any_value = arr[index] or { return Any(Null{}) }
}
if value is map[string]Any {
any_value = value[k] or { return Any(Null{}) }
if index > -1 {
arr := any_value as []Any
any_value = arr[index] or { return Any(Null{}) }
}
}
if key.len <= 1 {
return any_value
}
match any_value {
map[string]Any, []Any {
return a.value_(any_value, key[1..])
}
else {
return value
}
}
}