mirror of
https://github.com/lifegpc/msg-tool.git
synced 2026-06-07 05:18:44 +08:00
800 lines
29 KiB
Rust
800 lines
29 KiB
Rust
//! tools to process gettext po/pot files
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//!
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//! See [spec](https://www.gnu.org/software/gettext/manual/html_node/PO-Files.html)
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use crate::types::*;
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use anyhow::{Result, anyhow};
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use std::collections::{HashMap, HashSet};
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use unicode_segmentation::UnicodeSegmentation;
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#[derive(Debug)]
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/// A comment line
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pub enum Comment {
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/// Translator comment, starting with `# `
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Translator(String),
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/// Extracted comment, starting with `#.`.
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Extracted(String),
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/// Reference, starting with `#:`.
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Reference(String),
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/// Flag, starting with `#,`.
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Flag(Vec<String>),
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/// Previous untranslated string, starting with `#|`.
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Previous(String),
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/// Previous message block, starting with `#~`.
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PreviousStr(String),
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}
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#[derive(Debug)]
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/// A line in a .po file.
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pub enum PoLine {
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/// A comment line, starting with `#`.
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Comment(Comment),
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/// A msgid line
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MsgId(String),
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/// A msgstr line
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MsgStr(String),
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/// A msgctxt line
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MsgCtxt(String),
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/// A msgid_plural line
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MsgIdPlural(String),
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/// A msgstr[n] line
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MsgStrN(usize, String),
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/// Empty line
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EmptyLine,
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}
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fn dump_text_in_multi_lines(s: &str) -> Result<String> {
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if s.contains("\n") {
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let mut result = Vec::new();
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result.push("\"\"".to_string());
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let mut s = s;
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while let Some(pos) = s.find('\n') {
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let line = &s[..pos + 1];
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result.push(format!("\"{}\"", escape_c_str(line)?));
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s = &s[pos + 1..];
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}
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if !s.is_empty() {
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result.push(format!("\"{}\"", escape_c_str(s)?));
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}
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Ok(result.join("\n"))
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} else {
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Ok(format!("\"{}\"", escape_c_str(s)?))
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}
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}
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impl PoLine {
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fn dump(&self) -> Result<String> {
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Ok(match self {
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PoLine::Comment(c) => match c {
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Comment::Translator(s) => format!("# {}", s),
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Comment::Extracted(s) => format!("#. {}", s),
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Comment::Reference(s) => format!("#: {}", s),
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Comment::Flag(flags) => format!("#, {}", flags.join(", ")),
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Comment::Previous(s) => format!("#| {}", s),
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Comment::PreviousStr(s) => format!("#~ {}", s),
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},
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PoLine::MsgId(s) => format!("msgid {}", dump_text_in_multi_lines(s)?),
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PoLine::MsgStr(s) => format!("msgstr {}", dump_text_in_multi_lines(s)?),
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PoLine::MsgCtxt(s) => format!("msgctxt {}", dump_text_in_multi_lines(s)?),
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PoLine::MsgIdPlural(s) => format!("msgid_plural {}", dump_text_in_multi_lines(s)?),
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PoLine::MsgStrN(n, s) => format!("msgstr[{}] {}", n, dump_text_in_multi_lines(s)?),
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PoLine::EmptyLine => String::new(),
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})
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}
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}
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#[derive(Debug)]
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pub enum MsgStr {
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Single(String),
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Plural(Vec<(usize, String)>),
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}
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#[derive(Debug)]
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pub struct PoEntry {
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comments: Vec<Comment>,
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msgctxt: Option<String>,
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msgid: String,
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msgid_plural: Option<String>,
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msgstr: MsgStr,
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}
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/// Escapes a string according to C-style rules.
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///
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/// This function handles common escape sequences like \n, \t, \", \\, etc.
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/// For other ASCII control characters or non-printable characters, it uses octal notation (e.g., \0, \177).
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///
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/// # Arguments
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/// * `s`: The string slice to be escaped.
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///
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/// # Returns
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/// A `Result<String>` containing the new escaped string.
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pub fn escape_c_str(s: &str) -> Result<String> {
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let mut escaped = String::with_capacity(s.len());
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for c in s.chars() {
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match c {
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'\n' => escaped.push_str("\\n"),
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'\r' => escaped.push_str("\\r"),
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'\t' => escaped.push_str("\\t"),
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'\\' => escaped.push_str("\\\\"),
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'\"' => escaped.push_str("\\\""),
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'\0' => escaped.push_str("\\0"),
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'\x08' => escaped.push_str("\\b"),
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'\x0c' => escaped.push_str("\\f"),
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'\x0b' => escaped.push_str("\\v"),
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'\x07' => escaped.push_str("\\a"),
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c if c.is_ascii_control() && c != '\n' && c != '\r' && c != '\t' => {
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escaped.push_str(&format!("\\{:03o}", c as u8));
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}
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_ => escaped.push(c),
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}
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}
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Ok(escaped)
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}
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/// Unescapes a string that has been escaped C-style.
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///
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/// This function parses common escape sequences (like \n, \t, \", \\) as well as
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/// octal (\ooo) and hexadecimal (\xHH) escape notations.
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///
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/// # Arguments
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/// * `s`: The string slice containing C-style escape sequences.
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///
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/// # Returns
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/// A `Result<String>` containing the new unescaped string.
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/// If an invalid escape sequence is encountered, an error is returned.
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pub fn unescape_c_str(s: &str) -> Result<String> {
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let mut unescaped = String::with_capacity(s.len());
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let mut chars = s.chars().peekable();
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while let Some(c) = chars.next() {
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if c == '\\' {
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match chars.next() {
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Some('n') => unescaped.push('\n'),
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Some('r') => unescaped.push('\r'),
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Some('t') => unescaped.push('\t'),
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Some('b') => unescaped.push('\x08'),
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Some('f') => unescaped.push('\x0c'),
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Some('v') => unescaped.push('\x0b'),
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Some('a') => unescaped.push('\x07'),
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Some('\\') => unescaped.push('\\'),
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Some('\'') => unescaped.push('\''),
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Some('\"') => unescaped.push('\"'),
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Some('?') => unescaped.push('?'),
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Some(o @ '0'..='7') => {
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let mut octal = String::new();
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octal.push(o);
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while let Some(peek_char) = chars.peek() {
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if peek_char.is_digit(8) && octal.len() < 3 {
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octal.push(chars.next().unwrap());
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} else {
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break;
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}
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}
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let value = u8::from_str_radix(&octal, 8).map_err(|e| {
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anyhow!("Invalid octal escape sequence: \\{}: {}", octal, e)
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})?;
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unescaped.push(value as char);
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}
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// --- FIX START: Reworked hexadecimal parsing logic ---
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Some('x') => {
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let mut hex = String::new();
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// Read the first character, which must be a hex digit
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if let Some(c1) = chars.peek() {
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if c1.is_ascii_hexdigit() {
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hex.push(chars.next().unwrap());
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} else {
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// Handle cases like \xG
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return Err(anyhow!(
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"Invalid hex escape sequence: \\x followed by non-hex character '{}'",
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c1
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));
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}
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} else {
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// Handle cases where \x is at the end of the string
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return Err(anyhow!(
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"Invalid hex escape sequence: \\x must be followed by a hex digit"
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));
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}
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// Try to read the second character, which must also be a hex digit
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if let Some(c2) = chars.peek() {
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if c2.is_ascii_hexdigit() {
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hex.push(chars.next().unwrap());
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} else {
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// Handle cases like \xFG
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// We have successfully parsed one digit (like F), but it's followed by an invalid hex character (like G)
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// As per the test requirements, this should be an error
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return Err(anyhow!(
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"Invalid hex escape sequence: \\x{} followed by non-hex character '{}'",
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hex,
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c2
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));
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}
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}
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let value =
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u8::from_str_radix(&hex, 16).expect("Hex parsing should be valid here");
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unescaped.push(value as char);
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}
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// --- FIX END ---
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Some(other) => {
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return Err(anyhow!("Unknown escape sequence: \\{}", other));
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}
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None => {
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return Err(anyhow!("String cannot end with a single backslash"));
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}
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}
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} else {
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unescaped.push(c);
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}
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}
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Ok(unescaped)
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}
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pub struct PoDumper {
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entries: Vec<PoLine>,
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}
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impl PoDumper {
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pub fn new() -> Self {
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Self {
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entries: Vec::new(),
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}
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}
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fn gen_start_str(encoding: Encoding) -> String {
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let mut map = HashMap::new();
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let content_type = match encoding.charset() {
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Some(e) => format!("text/plain; charset={}", e),
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None => String::from("text/plain"),
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};
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map.insert("Content-Type", content_type);
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map.insert("X-Generator", String::from("msg-tool"));
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map.insert("MIME-Version", String::from("1.0"));
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let mut result = String::new();
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for (k, v) in map {
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result.push_str(&format!("{}: {}\n", k, v));
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}
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result
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}
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pub fn dump(mut self, entries: &[Message], encoding: Encoding) -> Result<String> {
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self.add_entry(PoEntry {
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comments: vec![
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Comment::Translator(String::from("Generated by msg-tool")),
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Comment::Flag(vec![String::from("fuzzy")]),
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],
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msgctxt: None,
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msgid: String::new(),
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msgid_plural: None,
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msgstr: MsgStr::Single(Self::gen_start_str(encoding)),
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});
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let mut added: HashSet<&String> = HashSet::new();
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let mut added_messages: HashMap<(&String, &Option<String>), usize> = HashMap::new();
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for entry in entries {
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let count = added_messages
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.get(&(&entry.message, &entry.name))
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.map(|&s| s)
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.unwrap_or(0);
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let inadded = added.contains(&entry.message);
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self.add_entry(PoEntry {
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comments: entry
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.name
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.as_ref()
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.map(|name| vec![Comment::Translator(format!("NAME: {}", name))])
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.unwrap_or_default(),
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msgctxt: if count > 0 || inadded {
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Some(format!(
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"{}{}",
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entry.name.as_ref().map(|s| s.as_str()).unwrap_or(""),
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count
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))
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} else {
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None
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},
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msgid: entry.message.clone(),
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msgid_plural: None,
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msgstr: MsgStr::Single(String::new()),
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});
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added_messages.insert((&entry.message, &entry.name), count + 1);
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if !inadded {
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added.insert(&entry.message);
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}
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}
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let mut result = String::new();
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for line in &self.entries {
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result.push_str(&line.dump()?);
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result.push('\n');
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}
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Ok(result)
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}
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fn add_entry(&mut self, entry: PoEntry) {
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for comment in entry.comments {
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self.entries.push(PoLine::Comment(comment));
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}
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if let Some(ctx) = entry.msgctxt {
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self.entries.push(PoLine::MsgCtxt(ctx));
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}
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self.entries.push(PoLine::MsgId(entry.msgid));
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let is_plural = entry.msgid_plural.is_some();
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if let Some(plural) = entry.msgid_plural {
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self.entries.push(PoLine::MsgIdPlural(plural));
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}
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match entry.msgstr {
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MsgStr::Single(s) => {
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if is_plural {
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self.entries.push(PoLine::MsgStrN(0, s));
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} else {
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self.entries.push(PoLine::MsgStr(s));
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}
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}
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MsgStr::Plural(v) => {
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for (n, s) in v {
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self.entries.push(PoLine::MsgStrN(n, s));
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}
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}
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}
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self.entries.push(PoLine::EmptyLine);
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}
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}
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pub struct PoParser<'a> {
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texts: Vec<&'a str>,
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pos: usize,
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llm_mark: Option<&'a str>,
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}
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impl<'a> PoParser<'a> {
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pub fn new(s: &'a str, llm_mark: Option<&'a str>) -> Self {
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Self {
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texts: s.graphemes(true).collect(),
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pos: 0,
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llm_mark,
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}
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}
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pub fn parse_lines(&mut self) -> Result<Vec<PoLine>> {
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let mut lines = Vec::new();
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while let Some(f) = self.next_line() {
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let f = f.trim();
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if f.starts_with("#") {
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if f.len() < 2 {
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return Err(anyhow!("Invalid comment line: {}", f));
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}
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let c = &f[1..];
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if c.starts_with(' ') {
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lines.push(PoLine::Comment(Comment::Translator(c[1..].to_string())));
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} else if c.starts_with('.') {
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lines.push(PoLine::Comment(Comment::Extracted(
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c[1..].trim_start().to_string(),
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)));
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} else if c.starts_with(':') {
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lines.push(PoLine::Comment(Comment::Reference(
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c[1..].trim_start().to_string(),
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)));
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} else if c.starts_with(',') {
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let flags = c[1..].split(',').map(|s| s.trim().to_string()).collect();
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lines.push(PoLine::Comment(Comment::Flag(flags)));
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} else if c.starts_with('|') {
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lines.push(PoLine::Comment(Comment::Previous(
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c[1..].trim_start().to_string(),
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)));
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} else if c.starts_with('~') {
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lines.push(PoLine::Comment(Comment::PreviousStr(
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c[1..].trim_start().to_string(),
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)));
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} else {
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return Err(anyhow!("Unknown comment type: {}", f));
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}
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} else if f.starts_with("msgid ") {
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let content = self.read_string_literal(&f[6..])?;
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lines.push(PoLine::MsgId(content));
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} else if f.starts_with("msgstr ") {
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let content = self.read_string_literal(&f[7..])?;
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lines.push(PoLine::MsgStr(content));
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} else if f.starts_with("msgctxt ") {
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let content = self.read_string_literal(&f[8..])?;
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lines.push(PoLine::MsgCtxt(content));
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} else if f.starts_with("msgid_plural ") {
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let content = self.read_string_literal(&f[13..])?;
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lines.push(PoLine::MsgIdPlural(content));
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} else if f.starts_with("msgstr[") {
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let end_bracket = f
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.find(']')
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.ok_or_else(|| anyhow!("Invalid msgstr[n] line: {}", f))?;
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let index_str = &f[7..end_bracket];
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let index: usize = index_str
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.parse()
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.map_err(|_| anyhow!("Invalid index in msgstr[n]: {}", index_str))?;
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let content = self.read_string_literal(&f[end_bracket + 1..])?;
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lines.push(PoLine::MsgStrN(index, content));
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} else if f.trim().is_empty() {
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lines.push(PoLine::EmptyLine);
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} else if f.starts_with('"') {
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// This is a continuation of a previous string.
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// According to GNU gettext manual, a string literal cannot appear on its own.
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// It must follow a keyword. However, some tools generate this.
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// We will append it to the last string-like element.
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let content = self.read_string_literal(&f)?;
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if let Some(last_line) = lines.last_mut() {
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match last_line {
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PoLine::MsgId(s) => s.push_str(&content),
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PoLine::MsgStr(s) => s.push_str(&content),
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PoLine::MsgCtxt(s) => s.push_str(&content),
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PoLine::MsgIdPlural(s) => s.push_str(&content),
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PoLine::MsgStrN(_, s) => s.push_str(&content),
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_ => return Err(anyhow!("Orphan string literal continuation: {}", f)),
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}
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} else {
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return Err(anyhow!("Orphan string literal continuation: {}", f));
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}
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} else {
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return Err(anyhow!("Unknown line type: {}", f));
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}
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}
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Ok(lines)
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}
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fn read_string_literal(&mut self, s: &str) -> Result<String> {
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let mut content = String::new();
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let current_line_str = s.trim();
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if current_line_str.starts_with('"') && current_line_str.ends_with('"') {
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content.push_str(&unescape_c_str(
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¤t_line_str[1..current_line_str.len() - 1],
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)?);
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} else {
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return Err(anyhow!("Invalid string literal: {}", s));
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}
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while let Some(peeked_line) = self.peek_line() {
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if peeked_line.trim().starts_with('"') {
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self.next_line(); // consume it
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let trimmed_line = peeked_line.trim();
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if trimmed_line.starts_with('"') && trimmed_line.ends_with('"') {
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content.push_str(&unescape_c_str(&trimmed_line[1..trimmed_line.len() - 1])?);
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} else {
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return Err(anyhow!(
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"Invalid string literal continuation: {}",
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peeked_line
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));
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}
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} else {
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break;
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}
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}
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Ok(content)
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}
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pub fn parse_entries(&mut self) -> Result<Vec<PoEntry>> {
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let lines = self.parse_lines()?;
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let mut entries = Vec::new();
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let mut current_entry_lines: Vec<PoLine> = Vec::new();
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for line in lines {
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if let PoLine::EmptyLine = line {
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if !current_entry_lines.is_empty() {
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entries.push(self.build_entry_from_lines(current_entry_lines)?);
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current_entry_lines = Vec::new();
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}
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} else {
|
|
current_entry_lines.push(line);
|
|
}
|
|
}
|
|
|
|
if !current_entry_lines.is_empty() {
|
|
entries.push(self.build_entry_from_lines(current_entry_lines)?);
|
|
}
|
|
|
|
Ok(entries)
|
|
}
|
|
|
|
fn build_entry_from_lines(&self, lines: Vec<PoLine>) -> Result<PoEntry> {
|
|
let mut comments = Vec::new();
|
|
let mut msgctxt: Option<String> = None;
|
|
let mut msgid: Option<String> = None;
|
|
let mut msgid_plural: Option<String> = None;
|
|
let mut msgstr: Option<String> = None;
|
|
let mut msgstr_plural: Vec<(usize, String)> = Vec::new();
|
|
|
|
for line in lines {
|
|
match line {
|
|
PoLine::Comment(c) => comments.push(c),
|
|
PoLine::MsgCtxt(s) => {
|
|
if msgctxt.is_some() {
|
|
return Err(anyhow!("Duplicate msgctxt in entry"));
|
|
}
|
|
msgctxt = Some(s);
|
|
}
|
|
PoLine::MsgId(s) => {
|
|
if msgid.is_some() {
|
|
return Err(anyhow!("Duplicate msgid in entry"));
|
|
}
|
|
msgid = Some(s);
|
|
}
|
|
PoLine::MsgIdPlural(s) => {
|
|
if msgid_plural.is_some() {
|
|
return Err(anyhow!("Duplicate msgid_plural in entry"));
|
|
}
|
|
msgid_plural = Some(s);
|
|
}
|
|
PoLine::MsgStr(s) => {
|
|
if msgstr.is_some() {
|
|
return Err(anyhow!("Duplicate msgstr in entry"));
|
|
}
|
|
msgstr = Some(s);
|
|
}
|
|
PoLine::MsgStrN(n, s) => {
|
|
if msgstr_plural.iter().any(|(i, _)| *i == n) {
|
|
return Err(anyhow!("Duplicate msgstr[{}] in entry", n));
|
|
}
|
|
msgstr_plural.push((n, s));
|
|
}
|
|
PoLine::EmptyLine => {
|
|
// This should not be reached if called from parse_entries
|
|
return Err(anyhow!("Unexpected empty line in build_entry_from_lines"));
|
|
}
|
|
}
|
|
}
|
|
|
|
let final_msgstr = if !msgstr_plural.is_empty() {
|
|
if msgstr.is_some() {
|
|
return Err(anyhow!(
|
|
"Mixing msgstr and msgstr[n] in the same entry is not allowed"
|
|
));
|
|
}
|
|
MsgStr::Plural(msgstr_plural)
|
|
} else {
|
|
MsgStr::Single(msgstr.unwrap_or_default())
|
|
};
|
|
|
|
Ok(PoEntry {
|
|
comments,
|
|
msgctxt,
|
|
msgid: msgid.ok_or_else(|| anyhow!("Entry is missing msgid"))?,
|
|
msgid_plural,
|
|
msgstr: final_msgstr,
|
|
})
|
|
}
|
|
|
|
fn peek(&self) -> Option<&'a str> {
|
|
self.texts.get(self.pos).copied()
|
|
}
|
|
|
|
fn peek_line(&self) -> Option<String> {
|
|
let mut line = String::new();
|
|
let mut current_pos = self.pos;
|
|
while let Some(c) = self.texts.get(current_pos).copied() {
|
|
current_pos += 1;
|
|
if c == "\n" || c == "\r\n" {
|
|
break;
|
|
}
|
|
line.push_str(c);
|
|
}
|
|
if line.is_empty() && current_pos >= self.texts.len() {
|
|
None
|
|
} else {
|
|
Some(line)
|
|
}
|
|
}
|
|
|
|
fn next_line(&mut self) -> Option<String> {
|
|
let mut line = String::new();
|
|
while let Some(c) = self.next() {
|
|
if c == "\n" || c == "\r\n" {
|
|
break;
|
|
}
|
|
line.push_str(c);
|
|
}
|
|
if line.is_empty() && self.peek().is_none() {
|
|
None
|
|
} else {
|
|
Some(line)
|
|
}
|
|
}
|
|
|
|
fn next(&mut self) -> Option<&'a str> {
|
|
let r = self.texts.get(self.pos).copied();
|
|
if r.is_some() {
|
|
self.pos += 1;
|
|
}
|
|
r
|
|
}
|
|
|
|
pub fn parse_as_vec(&mut self) -> Result<Vec<(String, String)>> {
|
|
let mut map = Vec::new();
|
|
let mut llm = None;
|
|
for (i, entry) in self.parse_entries()?.into_iter().enumerate() {
|
|
if entry.msgid.is_empty() && i == 0 {
|
|
// This is the header entry, skip it
|
|
continue;
|
|
}
|
|
for comment in &entry.comments {
|
|
if let Comment::Translator(s) = comment {
|
|
let s = s.trim();
|
|
if s.starts_with("NAME:") {
|
|
// name = Some(s[5..].trim().to_string());
|
|
} else if s.starts_with("LLM:") {
|
|
llm = Some(s[4..].trim().replace("\\n", "\n"));
|
|
}
|
|
}
|
|
}
|
|
let message = match entry.msgstr {
|
|
MsgStr::Single(s) => {
|
|
let s = s.trim();
|
|
if s.is_empty() {
|
|
llm.take()
|
|
.map(|mut llm| {
|
|
if let Some(mark) = self.llm_mark {
|
|
llm.push_str(mark);
|
|
}
|
|
llm
|
|
})
|
|
.unwrap_or_else(|| {
|
|
String::from(if entry.msgid.is_empty() { "" } else { "" })
|
|
})
|
|
} else {
|
|
let mut tmp = s.to_string();
|
|
if let Some(llm) = llm.take() {
|
|
if tmp == llm {
|
|
if let Some(mark) = self.llm_mark {
|
|
tmp.push_str(mark);
|
|
}
|
|
}
|
|
}
|
|
tmp
|
|
}
|
|
}
|
|
MsgStr::Plural(_) => {
|
|
return Err(anyhow!("Plural msgstr not supported in this context"));
|
|
}
|
|
};
|
|
map.push((entry.msgid, message));
|
|
}
|
|
Ok(map)
|
|
}
|
|
|
|
pub fn parse(&mut self) -> Result<Vec<Message>> {
|
|
let mut messages = Vec::new();
|
|
let mut llm = None;
|
|
let mut name = None;
|
|
for (i, entry) in self.parse_entries()?.into_iter().enumerate() {
|
|
if entry.msgid.is_empty() && i == 0 {
|
|
// This is the header entry, skip it
|
|
continue;
|
|
}
|
|
for comment in &entry.comments {
|
|
if let Comment::Translator(s) = comment {
|
|
let s = s.trim();
|
|
if s.starts_with("NAME:") {
|
|
name = Some(s[5..].trim().to_string());
|
|
} else if s.starts_with("LLM:") {
|
|
llm = Some(s[4..].trim().replace("\\n", "\n"));
|
|
}
|
|
}
|
|
}
|
|
let message = match entry.msgstr {
|
|
MsgStr::Single(s) => {
|
|
let s = s.trim();
|
|
if s.is_empty() {
|
|
llm.take()
|
|
.map(|mut llm| {
|
|
if let Some(mark) = self.llm_mark {
|
|
llm.push_str(mark);
|
|
}
|
|
llm
|
|
})
|
|
.unwrap_or_else(|| {
|
|
String::from(if entry.msgid.is_empty() { "" } else { "" })
|
|
})
|
|
} else {
|
|
let mut tmp = s.to_string();
|
|
if let Some(llm) = llm.take() {
|
|
if tmp == llm {
|
|
if let Some(mark) = self.llm_mark {
|
|
tmp.push_str(mark);
|
|
}
|
|
}
|
|
}
|
|
tmp
|
|
}
|
|
}
|
|
MsgStr::Plural(_) => {
|
|
return Err(anyhow!("Plural msgstr not supported in this context"));
|
|
}
|
|
};
|
|
let m = Message::new(message, name.take());
|
|
messages.push(m);
|
|
}
|
|
Ok(messages)
|
|
}
|
|
}
|
|
|
|
// --- Unit Tests ---
|
|
#[cfg(test)]
|
|
mod c_escape_tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn test_escape_basic() {
|
|
assert_eq!(escape_c_str("hello world").unwrap(), "hello world");
|
|
}
|
|
|
|
#[test]
|
|
fn test_escape_quotes_and_slashes() {
|
|
assert_eq!(
|
|
escape_c_str(r#"he"llo\world"#).unwrap(),
|
|
r#"he\"llo\\world"#
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_escape_control_chars() {
|
|
assert_eq!(escape_c_str("a\nb\tc\rd").unwrap(), r#"a\nb\tc\rd"#);
|
|
assert_eq!(escape_c_str("\0").unwrap(), r#"\0"#);
|
|
}
|
|
|
|
#[test]
|
|
fn test_escape_other_control_chars_as_octal() {
|
|
assert_eq!(escape_c_str("\x07").unwrap(), r#"\a"#);
|
|
assert_eq!(escape_c_str("\x7f").unwrap(), r#"\177"#);
|
|
}
|
|
|
|
#[test]
|
|
fn test_unescape_basic() {
|
|
assert_eq!(unescape_c_str("hello world").unwrap(), "hello world");
|
|
}
|
|
|
|
#[test]
|
|
fn test_unescape_quotes_and_slashes() {
|
|
assert_eq!(
|
|
unescape_c_str(r#"he\"llo\\world"#).unwrap(),
|
|
r#"he"llo\world"#
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn test_unescape_control_chars() {
|
|
assert_eq!(unescape_c_str(r#"a\nb\tc\rd"#).unwrap(), "a\nb\tc\rd");
|
|
}
|
|
|
|
#[test]
|
|
fn test_unescape_octal() {
|
|
assert_eq!(unescape_c_str(r#"\101"#).unwrap(), "A");
|
|
assert_eq!(unescape_c_str(r#"\60"#).unwrap(), "0");
|
|
assert_eq!(unescape_c_str(r#"\0"#).unwrap(), "\0");
|
|
assert_eq!(unescape_c_str(r#"\177"#).unwrap(), "\x7f");
|
|
assert_eq!(unescape_c_str(r#"hello\101world"#).unwrap(), "helloAworld");
|
|
}
|
|
|
|
#[test]
|
|
fn test_unescape_hex() {
|
|
assert_eq!(unescape_c_str(r#"\x41"#).unwrap(), "A");
|
|
assert_eq!(unescape_c_str(r#"\x30"#).unwrap(), "0");
|
|
assert_eq!(unescape_c_str(r#"\x7F"#).unwrap(), "\x7f");
|
|
assert_eq!(unescape_c_str(r#"\x7f"#).unwrap(), "\x7f");
|
|
assert_eq!(unescape_c_str(r#"hello\x41world"#).unwrap(), "helloAworld");
|
|
// A single hex digit is also valid
|
|
assert_eq!(unescape_c_str(r#"\xF"#).unwrap(), "\x0f");
|
|
}
|
|
|
|
#[test]
|
|
fn test_unescape_mixed() {
|
|
let original = "A\tB\"C\\D\0E";
|
|
let escaped = r#"A\tB\"C\\D\0E"#;
|
|
assert_eq!(unescape_c_str(escaped).unwrap(), original);
|
|
}
|
|
|
|
#[test]
|
|
fn test_unescape_invalid_sequence() {
|
|
assert!(unescape_c_str(r#"\q"#).is_err());
|
|
assert!(unescape_c_str(r#"hello\"#).is_err());
|
|
assert!(unescape_c_str(r#"\x"#).is_err());
|
|
// New: test \x followed immediately by an invalid character
|
|
assert!(unescape_c_str(r#"\xG"#).is_err());
|
|
// This should now pass
|
|
assert!(unescape_c_str(r#"\xFG"#).is_err());
|
|
assert!(unescape_c_str(r#"\8"#).is_err());
|
|
}
|
|
}
|