32946b2d7c
Truncates the result of binary operations on integers to the size of the resulting type. Also rewrites convertInt to not require allocations. Fixes #2454
99 lines
1.8 KiB
Go
99 lines
1.8 KiB
Go
package proc
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import (
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"testing"
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)
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func TestAlignAddr(t *testing.T) {
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c := func(align, in, tgt int64) {
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out := alignAddr(in, align)
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if out != tgt {
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t.Errorf("alignAddr(%x, %x) = %x, expected %x", in, align, out, tgt)
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}
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}
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for i := int64(0); i <= 0xf; i++ {
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c(1, i, i)
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c(1, i+0x10000, i+0x10000)
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}
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for _, example := range []struct{ align, in, tgt int64 }{
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{2, 0, 0},
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{2, 1, 2},
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{2, 2, 2},
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{2, 3, 4},
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{2, 4, 4},
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{2, 5, 6},
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{2, 6, 6},
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{2, 7, 8},
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{2, 8, 8},
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{2, 9, 0xa},
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{2, 0xa, 0xa},
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{2, 0xb, 0xc},
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{2, 0xc, 0xc},
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{2, 0xd, 0xe},
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{2, 0xe, 0xe},
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{2, 0xf, 0x10},
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{4, 0, 0},
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{4, 1, 4},
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{4, 2, 4},
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{4, 3, 4},
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{4, 4, 4},
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{4, 5, 8},
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{4, 6, 8},
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{4, 7, 8},
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{4, 8, 8},
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{4, 9, 0xc},
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{4, 0xa, 0xc},
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{4, 0xb, 0xc},
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{4, 0xc, 0xc},
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{4, 0xd, 0x10},
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{4, 0xe, 0x10},
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{4, 0xf, 0x10},
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{8, 0, 0},
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{8, 1, 8},
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{8, 2, 8},
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{8, 3, 8},
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{8, 4, 8},
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{8, 5, 8},
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{8, 6, 8},
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{8, 7, 8},
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{8, 8, 8},
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{8, 9, 0x10},
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{8, 0xa, 0x10},
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{8, 0xb, 0x10},
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{8, 0xc, 0x10},
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{8, 0xd, 0x10},
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{8, 0xe, 0x10},
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{8, 0xf, 0x10},
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} {
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c(example.align, example.in, example.tgt)
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c(example.align, example.in+0x10000, example.tgt+0x10000)
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}
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}
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func TestConvertInt(t *testing.T) {
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var testCases = []struct {
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in uint64
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signed bool
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size int64
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tgt uint64
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}{
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{1, false, 1, 1},
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{uint64(0xf0), true, 1, 0xfffffffffffffff0},
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{uint64(0xf0), false, 1, 0xf0},
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{uint64(0x70), true, 1, 0x70},
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{uint64(0x90f0), true, 2, 0xffffffffffff90f0},
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{uint64(0x90f0), false, 2, 0x90f0},
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}
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for _, tc := range testCases {
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out := convertInt(tc.in, tc.signed, tc.size)
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t.Logf("in=%#016x signed=%v size=%d -> %#016x\n", tc.in, tc.signed, tc.size, out)
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if out != tc.tgt {
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t.Errorf("expected=%#016x got=%#016x\n", tc.tgt, out)
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}
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}
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}
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