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54 lines
1.3 KiB
C
54 lines
1.3 KiB
C
module std::io::varint @test;
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import std::io;
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fn void! write_read()
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{
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ByteBuffer buf;
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buf.tinit(16)!;
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usz n;
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uint x;
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uint y;
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n = buf.write_varint(123)!;
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assert(n == 1, "got %d; want 1", n);
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buf.read_varint(&y)!;
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assert(y == 123, "got %d; want 123", y);
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n = buf.write_varint(123456789)!;
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assert(n == 4, "got %d; want 4", n);
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buf.read_varint(&y)!;
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assert(y == 123456789, "got %d; want 123456789", y);
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}
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struct VarIntTest
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{
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uint in;
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char[] bytes;
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}
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fn void! samples()
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{
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VarIntTest[] tcases = {
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{ 0, { 0x00 } },
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{ 100, { 0x64 } },
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{ 127, { 0x7F } },
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{ 128, { 0x80, 0x01 } },
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{ 16271, { 0x8F, 0x7F } },
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{ 16383, { 0xFF, 0x7F } },
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{ 16384, { 0x80, 0x80, 0x01 } },
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{ 1048576, { 0x80, 0x80, 0x40 } },
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{ 2097151, { 0xFF, 0xFF, 0x7F } },
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{ 2097152, { 0x80, 0x80, 0x80, 0x01 } },
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{ 2147483648, { 0x80, 0x80, 0x80, 0x80, 0x08 } },
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{ 4294967295, { 0xFF, 0xFF, 0xFF, 0xFF, 0x0F } },
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};
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foreach (tc : tcases)
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{
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ByteWriter bw;
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bw.tinit();
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usz n = bw.write_varint(tc.in)!;
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assert(n == tc.bytes.len, "got %d; want %d", n, tc.bytes.len);
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char[] bytes = bw.bytes[:bw.index];
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assert(bytes == tc.bytes, "got %d; want %d", bytes, tc.bytes);
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}
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} |