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AK: Add String::from_stream method
The caller is responsible for determining how long the string is that they want to read.
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@ -10,6 +10,7 @@
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#include <LibTest/TestCase.h>
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#include <AK/MemoryStream.h>
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#include <AK/StringBuilder.h>
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#include <AK/Try.h>
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#include <AK/Utf8View.h>
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@ -67,6 +68,54 @@ TEST_CASE(long_strings)
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EXPECT_EQ(string.bytes_as_string_view(), "abcdefgh"sv);
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}
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TEST_CASE(long_streams)
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{
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{
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u8 bytes[64] = {};
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constexpr auto test_view = "Well, hello friends"sv;
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FixedMemoryStream stream(Bytes { bytes, sizeof(bytes) });
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MUST(stream.write(test_view.bytes()));
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MUST(stream.seek(0));
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auto string = MUST(String::from_stream(stream, test_view.length()));
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EXPECT_EQ(string.is_short_string(), false);
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EXPECT_EQ(string.bytes().size(), 19u);
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EXPECT_EQ(string.bytes_as_string_view(), test_view);
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}
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{
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AllocatingMemoryStream stream;
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MUST(stream.write(("abc"sv).bytes()));
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auto string = MUST(String::from_stream(stream, 3u));
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EXPECT_EQ(string.is_short_string(), true);
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EXPECT_EQ(string.bytes().size(), 3u);
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EXPECT_EQ(string.bytes_as_string_view(), "abc"sv);
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}
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{
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AllocatingMemoryStream stream;
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MUST(stream.write(("0123456789"sv).bytes()));
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auto string = MUST(String::from_stream(stream, 9u));
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EXPECT_EQ(string.is_short_string(), false);
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EXPECT_EQ(string.bytes().size(), 9u);
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EXPECT_EQ(string.bytes_as_string_view(), "012345678"sv);
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}
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{
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AllocatingMemoryStream stream;
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MUST(stream.write_value(0xffffffff));
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MUST(stream.write_value(0xffffffff));
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MUST(stream.write_value(0xffffffff));
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auto error_or_string = String::from_stream(stream, stream.used_buffer_size());
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EXPECT_EQ(error_or_string.is_error(), true);
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}
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}
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TEST_CASE(from_code_points)
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{
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for (u32 code_point = 0; code_point < 0x80; ++code_point) {
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