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AK+Everywhere: Fix compiletime format parsing of replacement fields

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Ali Mohammad Pur 2021-06-01 23:05:27 +04:30 committed by Ali Mohammad Pur
parent c0d1a75881
commit 944855ca18
Notes: sideshowbarker 2024-07-18 17:03:02 +09:00 
Author: https://github.com/alimpfard
Commit: https://github.com/SerenityOS/serenity/commit/944855ca185
Pull-request: https://github.com/SerenityOS/serenity/pull/7673
Reviewed-by: https://github.com/linusg ✅
3 changed files with 17 additions and 12 deletions
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11
AK/CheckedFormatString.h
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@ -79,6 +79,7 @@ consteval auto count_fmt_params(const char (&fmt)[N])
size_t unclosed_braces { 0 };
size_t extra_closed_braces { 0 };
size_t nesting_level { 0 };
Array<size_t, 4> last_format_specifier_start { 0 };
size_t total_used_last_format_specifier_start_count { 0 };
@ -100,13 +101,17 @@ consteval auto count_fmt_params(const char (&fmt)[N])
result.last_format_specifier_start[result.total_used_last_format_specifier_start_count++] = i + 1;
++result.unclosed_braces;
++result.nesting_level;
break;
case '}':
if (i + 1 < N && fmt[i + 1] == '}') {
++i;
continue;
if (result.nesting_level == 0) {
if (i + 1 < N && fmt[i + 1] == '}') {
++i;
continue;
}
}
if (result.unclosed_braces) {
--result.nesting_level;
--result.unclosed_braces;
if (result.total_used_last_format_specifier_start_count == 0)

10
Tests/AK/TestFormat.cpp
View file

@ -105,12 +105,12 @@ TEST_CASE(zero_pad)
TEST_CASE(replacement_field)
{
// FIXME: Compiletime check bypass: cannot parse '}}' correctly.
EXPECT_EQ(String::formatted(StringView { "{:*>{1}}" }, 13, static_cast<size_t>(10)), "********13");
EXPECT_EQ(String::formatted(StringView { "{:*<{1}}" }, 7, 4), "7***");
EXPECT_EQ(String::formatted("{:*>{1}}", 13, static_cast<size_t>(10)), "********13");
EXPECT_EQ(String::formatted("{:*<{1}}", 7, 4), "7***");
// Compiletime check bypass: intentionally ignoring extra arguments
EXPECT_EQ(String::formatted(StringView { "{:{2}}" }, -5, 8, 16), " -5");
EXPECT_EQ(String::formatted(StringView { "{{{:*^{1}}}}" }, 1, 3), "{*1*}");
EXPECT_EQ(String::formatted(StringView { "{:0{}}" }, 1, 3), "001");
EXPECT_EQ(String::formatted("{{{:*^{1}}}}", 1, 3), "{*1*}");
EXPECT_EQ(String::formatted("{:0{}}", 1, 3), "001");
}
TEST_CASE(replacement_field_regression)

8
Userland/Shell/Shell.cpp
View file

@ -1998,16 +1998,16 @@ void Shell::possibly_print_error() const
warn("\x1b[31m");
size_t length_written_so_far = 0;
if (line == (i64)source_position.position->start_line.line_number) {
warn(StringView { "{:~>{}}" }, "", 5 + source_position.position->start_line.line_column);
warn("{:~>{}}", "", 5 + source_position.position->start_line.line_column);
length_written_so_far += source_position.position->start_line.line_column;
} else {
warn(StringView { "{:~>{}}" }, "", 5);
warn("{:~>{}}", "", 5);
}
if (line == (i64)source_position.position->end_line.line_number) {
warn(StringView { "{:^>{}}" }, "", source_position.position->end_line.line_column - length_written_so_far);
warn("{:^>{}}", "", source_position.position->end_line.line_column - length_written_so_far);
length_written_so_far += source_position.position->start_line.line_column;
} else {
warn(StringView { "{:^>{}}" }, "", current_line.length() - length_written_so_far);
warn("{:^>{}}", "", current_line.length() - length_written_so_far);
}
warnln("\x1b[0m");
}