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https://github.com/storytold/pdfcraft.git
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aiongg
fc1372a64c
hayro-cmap reads CMap streams with hayro-postscript's token scanner, whose object::read skipped each `<<` and `>>` by calling itself again. A CMap holding a long run of `<` or `>` used one stack frame per pair, overflowed the stack and aborted the process. Vendor hayro-postscript 0.1.0 with read() looping over the delimiters instead (from storytold/craft-libs#263), patched in beside hayro-cmap. Four object::tests cover long `<<` and `>>` runs and the skipped delimiters, plain and nested.
31 lines
950 B
Rust
31 lines
950 B
Rust
//! Error types for the PostScript scanner.
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use core::fmt;
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/// A specialized [`Result`] type for PostScript scanner operations.
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pub type Result<T> = core::result::Result<T, Error>;
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/// An error encountered while scanning a PostScript token stream.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum Error {
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/// A syntax error in the input.
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SyntaxError,
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/// A numeric value exceeded implementation limits.
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LimitCheck,
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/// An unsupported PostScript type was encountered (like dictionaries or
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/// procedures, which will be added in the future).
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UnsupportedType,
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}
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impl fmt::Display for Error {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match self {
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Self::SyntaxError => f.write_str("syntaxerror"),
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Self::LimitCheck => f.write_str("limitcheck"),
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Self::UnsupportedType => f.write_str("unsupported type"),
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}
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}
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}
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impl core::error::Error for Error {}
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