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AK: Add a try variant of StringBuilder::append_escaped_for_json

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This will allow us to make a fallible version of the JSON serializers.
This commit is contained in:
Idan Horowitz 2022-02-24 19:15:31 +02:00 committed by Andreas Kling
parent 7440b632fe
commit 9da8c78133
Notes: sideshowbarker 2024-07-17 18:10:37 +09:00 
Author: https://github.com/IdanHo
Commit: https://github.com/SerenityOS/serenity/commit/9da8c78133
Pull-request: https://github.com/SerenityOS/serenity/pull/12754
Reviewed-by: https://github.com/bgianfo ✅
Reviewed-by: https://github.com/elcuco
2 changed files with 14 additions and 7 deletions
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20
AK/StringBuilder.cpp
View File

@ -171,31 +171,37 @@ void StringBuilder::append_as_lowercase(char ch)
}
void StringBuilder::append_escaped_for_json(StringView string)
{
MUST(try_append_escaped_for_json(string));
}
ErrorOr<void> StringBuilder::try_append_escaped_for_json(StringView string)
{
for (auto ch : string) {
switch (ch) {
case '\b':
append("\\b");
TRY(try_append("\\b"));
break;
case '\n':
append("\\n");
TRY(try_append("\\n"));
break;
case '\t':
append("\\t");
TRY(try_append("\\t"));
break;
case '\"':
append("\\\"");
TRY(try_append("\\\""));
break;
case '\\':
append("\\\\");
TRY(try_append("\\\\"));
break;
default:
if (ch >= 0 && ch <= 0x1f)
appendff("\\u{:04x}", ch);
TRY(try_appendff("\\u{:04x}", ch));
else
append(ch);
TRY(try_append(ch));
}
}
return {};
}
}

1
AK/StringBuilder.h
View File

@ -35,6 +35,7 @@ public:
return vformat(*this, fmtstr.view(), variadic_format_params);
}
ErrorOr<void> try_append(char const*, size_t);
ErrorOr<void> try_append_escaped_for_json(StringView);
void append(StringView);
#ifndef KERNEL