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#[cfg(feature = "catalog")]
use crate::libxml::catalog::{XML_CATALOG_PI, XmlCatalogAllow, xml_catalog_get_defaults};
use crate::{
chvalid::XmlCharValid,
error::XmlParserErrors,
parser::{
XML_MAX_HUGE_LENGTH, XML_MAX_TEXT_LENGTH, XmlParserCtxt, XmlParserInputState,
XmlParserOption, xml_fatal_err, xml_fatal_err_msg, xml_fatal_err_msg_str, xml_ns_err,
xml_warning_msg,
},
};
// List of XML prefixed PI allowed by W3C specs
const XML_W3_CPIS: &[&str] = &["xml-stylesheet", "xml-model"];
impl XmlParserCtxt<'_> {
/// Parse the name of a PI
///
/// ```text
/// [17] PITarget ::= Name - (('X' | 'x') ('M' | 'm') ('L' | 'l'))
/// ```
///
/// Returns the PITarget name or NULL
#[doc(alias = "xmlParsePITarget")]
fn parse_pi_target(&mut self) -> Option<String> {
let name = self.parse_name()?;
if name.as_bytes()[..name.len().min(3)].eq_ignore_ascii_case(b"xml") {
if name == "xml" {
xml_fatal_err_msg(
self,
XmlParserErrors::XmlErrReservedXmlName,
"XML declaration allowed only at the start of the document\n",
);
return Some(name);
} else if name.len() == 3 {
xml_fatal_err(self, XmlParserErrors::XmlErrReservedXmlName, None);
return Some(name);
}
if XML_W3_CPIS.iter().any(|&pi| pi == name) {
return Some(name);
}
xml_warning_msg!(
self,
XmlParserErrors::XmlErrReservedXmlName,
"xmlParsePITarget: invalid name prefix 'xml'\n"
);
}
if name.contains(':') {
xml_ns_err!(
self,
XmlParserErrors::XmlNsErrColon,
"colons are forbidden from PI names '{}'\n",
name
);
}
Some(name)
}
/// Parse an XML Catalog Processing Instruction.
///
/// `<?oasis-xml-catalog catalog="http://example.com/catalog.xml"?>`
///
/// Occurs only if allowed by the user and if happening in the Misc
/// part of the document before any doctype information.
/// This will add the given catalog to the parsing context in order
/// to be used if there is a resolution need further down in the document.
#[doc(alias = "xmlParseCatalogPI")]
#[cfg(feature = "catalog")]
fn parse_catalog_pi(&mut self, catalog: &str) {
use crate::libxml::catalog::XmlCatalogEntry;
macro_rules! syntax_error {
() => {
xml_warning_msg!(
self,
XmlParserErrors::XmlWarCatalogPI,
"Catalog PI syntax error: {}\n",
catalog
);
};
}
let mut tmp = catalog;
tmp = tmp.trim_start_matches(|c: char| c.is_xml_blank_char());
let Some(rem) = tmp.strip_prefix("catalog") else {
syntax_error!();
return;
};
tmp = rem.trim_start_matches(|c: char| c.is_xml_blank_char());
let Some(rem) = tmp.strip_prefix('=') else {
syntax_error!();
return;
};
tmp = rem.trim_start_matches(|c: char| c.is_xml_blank_char());
let Some(quoto) = tmp.chars().next().filter(|&c| c == '\'' || c == '"') else {
syntax_error!();
return;
};
tmp = &tmp[1..];
let Some((url, rem)) = tmp.split_once(quoto) else {
syntax_error!();
return;
};
tmp = rem.trim_start_matches(|c: char| c.is_xml_blank_char());
if !tmp.is_empty() {
syntax_error!();
return;
}
if let Some(catalogs) = self.catalogs.as_mut() {
catalogs.add_local(url);
} else {
self.catalogs = Some(XmlCatalogEntry::new(url));
}
}
/// Parse an XML Processing Instruction.
///
/// ```text
/// [16] PI ::= '<?' PITarget (S (Char* - (Char* '?>' Char*)))? '?>'
/// ```
///
/// The processing is transferred to SAX once parsed.
#[doc(alias = "xmlParsePI")]
pub(crate) fn parse_pi(&mut self) {
let max_length = if self.options & XmlParserOption::XmlParseHuge as i32 != 0 {
XML_MAX_HUGE_LENGTH
} else {
XML_MAX_TEXT_LENGTH
};
let mut buf = String::new();
if self.content_bytes().starts_with(b"<?") {
let inputid = self.input().unwrap().id;
let state = self.instate;
self.instate = XmlParserInputState::XmlParserPI;
// this is a Processing Instruction.
self.advance(2);
// Parse the target name and check for special support like namespace.
if let Some(target) = self.parse_pi_target() {
if self.content_bytes().starts_with(b"?>") {
if inputid != self.input().unwrap().id {
xml_fatal_err_msg(
self,
XmlParserErrors::XmlErrEntityBoundary,
"PI declaration doesn't start and stop in the same entity\n",
);
}
self.advance(2);
// SAX: PI detected.
if !self.disable_sax {
if let Some(processing_instruction) = self
.sax
.as_deref_mut()
.and_then(|sax| sax.processing_instruction)
{
processing_instruction(self, &target, None);
}
}
if !matches!(self.instate, XmlParserInputState::XmlParserEOF) {
self.instate = state;
}
return;
}
if self.skip_blanks() == 0 {
xml_fatal_err_msg_str!(
self,
XmlParserErrors::XmlErrSpaceRequired,
"ParsePI: PI {} space expected\n",
target
);
}
let input = self.input().unwrap();
let mut content = input.current_contents();
let mut line = input.line;
let mut col = input.col;
while content[0] < 0x80 && content[0].is_xml_char() && !content.starts_with(b"?>") {
buf.push(content[0] as char);
if content[0] == b'\n' {
line += 1;
col = 1;
} else {
col += 1;
}
content = &content[1..];
if buf.len() > max_length {
let len = content.len();
let input = self.input_mut().unwrap();
input.line = line;
input.col = col;
input.cur = input.base_contents().len() - len;
xml_fatal_err_msg_str!(
self,
XmlParserErrors::XmlErrPINotFinished,
"PI {} too big found",
target
);
self.instate = state;
return;
}
if content.len() < 2 {
let input = self.input_mut().unwrap();
input.line = line;
input.col = col;
input.cur = input.base_contents().len();
self.grow();
content = self.content_bytes();
if content.len() < 2 {
break;
}
}
}
let len = content.len();
let input = self.input_mut().unwrap();
input.line = line;
input.col = col;
input.cur = input.base_contents().len() - len;
while let Some(cur) = self.consume_char_if(|ctxt, c| {
c.is_xml_char() && (c != '?' || ctxt.nth_byte(1) != b'>')
}) {
buf.push(cur);
if buf.len() > max_length {
xml_fatal_err_msg_str!(
self,
XmlParserErrors::XmlErrPINotFinished,
"PI {} too big found",
target
);
self.instate = state;
return;
}
}
if matches!(self.instate, XmlParserInputState::XmlParserEOF) {
return;
}
if self.current_char() != Some('?') {
xml_fatal_err_msg_str!(
self,
XmlParserErrors::XmlErrPINotFinished,
"ParsePI: PI {} never end ...\n",
target
);
} else {
if inputid != self.input().unwrap().id {
xml_fatal_err_msg(
self,
XmlParserErrors::XmlErrEntityBoundary,
"PI declaration doesn't start and stop in the same entity\n",
);
}
self.advance(2);
#[cfg(feature = "catalog")]
if matches!(
state,
XmlParserInputState::XmlParserMisc | XmlParserInputState::XmlParserStart
) && target == XML_CATALOG_PI
{
let allow = xml_catalog_get_defaults();
if matches!(allow, XmlCatalogAllow::Document | XmlCatalogAllow::All) {
self.parse_catalog_pi(&buf);
}
}
// SAX: PI detected.
if !self.disable_sax {
if let Some(processing_instruction) = self
.sax
.as_deref_mut()
.and_then(|sax| sax.processing_instruction)
{
processing_instruction(self, &target, Some(&buf));
}
}
}
} else {
xml_fatal_err(self, XmlParserErrors::XmlErrPINotStarted, None);
}
if !matches!(self.instate, XmlParserInputState::XmlParserEOF) {
self.instate = state;
}
}
}
}