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pattern/bencode: Various fixes (#393)

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* Fix bencode dictionary

When parsing a bencode dictionary, the end character 'e' was never
consumed. This caused a misinterpretation of the character as struct Value of
an unknown type 'e'.

* Fix bencode list

A list was not included in the Value's parsing logic so it may have
been mistakenly parsed as a string.

* Fix std::ctype::isprint not including space

The space character, 0x20, is considered as a printable character in ASCII
and in >=C89. Adding it to the range of std::ctype::isprint also fixes
other std::ctype functions that use it.

* Fix bencode byte string formatting

Byte strings do not render nicely in pattern data's value column if they
contain non-printable characters. This commit makes the value of byte
strings to be surrounded by quotation marks, and renders a warning text
without quotation marks if the byte string contains non-printable
characters.
This commit is contained in:
Niketin
2025-05-10 14:34:36 +03:00
committed by GitHub
parent 5b8dde19a9
commit ee8d2f50b7
2 changed files with 12 additions and 3 deletions
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2
includes/std/ctype.pat
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@@ -85,7 +85,7 @@ namespace auto std::ctype {
@return True if `c` is part of this range, false otherwise
*/
fn isprint(char c) {
return c >= '0' && c <= '~';
return c >= ' ' && c <= '~';
};
/**

13
patterns/bencode.hexpat
View File

@@ -38,10 +38,15 @@ namespace bencode {
ASCIIDecimal length;
char separator [[hidden]];
char value[length];
} [[sealed, format("bencode::format_string"), transform("bencode::format_string")]];
} [[sealed, format("bencode::format_string")]];
fn format_string(String string) {
return string.value;
for (u64 i = 0, i < string.length, i = i + 1) {
if (!std::ctype::isprint(string.value[i])) {
return "Contains non-printable characters";
}
}
return std::format("\"{}\"", string.value);
};
using Bencode;
@@ -57,6 +62,10 @@ namespace bencode {
if (type == Type::Dictionary) {
DictionaryEntry entry[while(std::mem::read_unsigned($, 1) != 'e')];
char end;
} else if (type == Type::List) {
Value entry[while(std::mem::read_unsigned($, 1) != 'e')];
char end;
} else if (type == Type::Integer) {
ASCIIDecimal value;
char end;