64 lines
1.5 KiB
Rust
64 lines
1.5 KiB
Rust
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use anyhow::anyhow;
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use quick_xml::events::attributes::Attribute;
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use std::borrow::Cow;
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use std::fmt::Display;
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//------------------------------------------
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pub fn bytes_val<'a>(kv: &'a Attribute) -> Cow<'a, [u8]> {
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kv.unescaped_value().unwrap()
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}
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// FIXME: nasty unwraps
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pub fn string_val(kv: &Attribute) -> String {
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let v = kv.unescaped_value().unwrap();
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let bytes = v.to_vec();
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String::from_utf8(bytes).unwrap()
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}
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// FIXME: there's got to be a way of doing this without copying the string
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pub fn u64_val(kv: &Attribute) -> anyhow::Result<u64> {
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let n = string_val(kv).parse::<u64>()?;
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Ok(n)
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}
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pub fn u32_val(kv: &Attribute) -> anyhow::Result<u32> {
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let n = string_val(kv).parse::<u32>()?;
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Ok(n)
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}
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pub fn bool_val(kv: &Attribute) -> anyhow::Result<bool> {
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let n = string_val(kv).parse::<bool>()?;
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Ok(n)
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}
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pub fn bad_attr<T>(_tag: &str, _attr: &[u8]) -> anyhow::Result<T> {
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todo!();
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}
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pub fn check_attr<T>(tag: &str, name: &str, maybe_v: Option<T>) -> anyhow::Result<T> {
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match maybe_v {
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None => missing_attr(tag, name),
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Some(v) => Ok(v),
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}
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}
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fn missing_attr<T>(tag: &str, attr: &str) -> anyhow::Result<T> {
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let msg = format!("missing attribute '{}' for tag '{}", attr, tag);
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Err(anyhow!(msg))
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}
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pub fn mk_attr<T: Display>(key: &[u8], value: T) -> Attribute {
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Attribute {
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key,
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value: mk_attr_(value),
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}
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}
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fn mk_attr_<'a, T: Display>(n: T) -> Cow<'a, [u8]> {
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let str = format!("{}", n);
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Cow::Owned(str.into_bytes())
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}
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//------------------------------------------
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