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use crate::libyaml::cstr::CStr;
use std::fmt::{self, Debug, Display};
use std::mem::MaybeUninit;
use std::ptr::NonNull;
use unsafe_libyaml as sys;
pub(crate) type Result<T> = std::result::Result<T, Error>;
pub(crate) struct Error {
kind: sys::yaml_error_type_t,
problem: CStr<'static>,
problem_offset: u64,
problem_mark: Mark,
context: Option<CStr<'static>>,
context_mark: Mark,
}
impl Error {
pub unsafe fn parse_error(parser: *const sys::yaml_parser_t) -> Self {
Error {
kind: (*parser).error,
problem: match NonNull::new((*parser).problem as *mut _) {
Some(problem) => CStr::from_ptr(problem),
None => CStr::from_bytes_with_nul(b"libyaml parser failed but there is no error\0"),
},
problem_offset: (*parser).problem_offset,
problem_mark: Mark {
sys: (*parser).problem_mark,
},
context: match NonNull::new((*parser).context as *mut _) {
Some(context) => Some(CStr::from_ptr(context)),
None => None,
},
context_mark: Mark {
sys: (*parser).context_mark,
},
}
}
pub unsafe fn emit_error(emitter: *const sys::yaml_emitter_t) -> Self {
Error {
kind: (*emitter).error,
problem: match NonNull::new((*emitter).problem as *mut _) {
Some(problem) => CStr::from_ptr(problem),
None => {
CStr::from_bytes_with_nul(b"libyaml emitter failed but there is no error\0")
}
},
problem_offset: 0,
problem_mark: Mark {
sys: MaybeUninit::<sys::yaml_mark_t>::zeroed().assume_init(),
},
context: None,
context_mark: Mark {
sys: MaybeUninit::<sys::yaml_mark_t>::zeroed().assume_init(),
},
}
}
pub fn mark(&self) -> Mark {
self.problem_mark
}
}
impl Display for Error {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
write!(formatter, "{}", self.problem)?;
if self.problem_mark.sys.line != 0 || self.problem_mark.sys.column != 0 {
write!(formatter, " at {}", self.problem_mark)?;
} else if self.problem_offset != 0 {
write!(formatter, " at position {}", self.problem_offset)?;
}
if let Some(context) = &self.context {
write!(formatter, ", {}", context)?;
if (self.context_mark.sys.line != 0 || self.context_mark.sys.column != 0)
&& (self.context_mark.sys.line != self.problem_mark.sys.line
|| self.context_mark.sys.column != self.problem_mark.sys.column)
{
write!(formatter, " at {}", self.context_mark)?;
}
}
Ok(())
}
}
impl Debug for Error {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
let mut formatter = formatter.debug_struct("Error");
if let Some(kind) = match self.kind {
sys::YAML_MEMORY_ERROR => Some("MEMORY"),
sys::YAML_READER_ERROR => Some("READER"),
sys::YAML_SCANNER_ERROR => Some("SCANNER"),
sys::YAML_PARSER_ERROR => Some("PARSER"),
sys::YAML_COMPOSER_ERROR => Some("COMPOSER"),
sys::YAML_WRITER_ERROR => Some("WRITER"),
sys::YAML_EMITTER_ERROR => Some("EMITTER"),
_ => None,
} {
formatter.field("kind", &format_args!("{}", kind));
}
formatter.field("problem", &self.problem);
if self.problem_mark.sys.line != 0 || self.problem_mark.sys.column != 0 {
formatter.field("problem_mark", &self.problem_mark);
} else if self.problem_offset != 0 {
formatter.field("problem_offset", &self.problem_offset);
}
if let Some(context) = &self.context {
formatter.field("context", context);
if self.context_mark.sys.line != 0 || self.context_mark.sys.column != 0 {
formatter.field("context_mark", &self.context_mark);
}
}
formatter.finish()
}
}
#[derive(Copy, Clone)]
pub(crate) struct Mark {
pub(super) sys: sys::yaml_mark_t,
}
impl Mark {
pub fn index(&self) -> u64 {
self.sys.index
}
pub fn line(&self) -> u64 {
self.sys.line
}
pub fn column(&self) -> u64 {
self.sys.column
}
}
impl Display for Mark {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
if self.sys.line != 0 || self.sys.column != 0 {
write!(
formatter,
"line {} column {}",
self.sys.line + 1,
self.sys.column + 1,
)
} else {
write!(formatter, "position {}", self.sys.index)
}
}
}
impl Debug for Mark {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
let mut formatter = formatter.debug_struct("Mark");
if self.sys.line != 0 || self.sys.column != 0 {
formatter.field("line", &(self.sys.line + 1));
formatter.field("column", &(self.sys.column + 1));
} else {
formatter.field("index", &self.sys.index);
}
formatter.finish()
}
}
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