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author | Wim <wim@42.be> | 2022-04-25 23:50:10 +0200 |
---|---|---|
committer | GitHub <noreply@github.com> | 2022-04-25 23:50:10 +0200 |
commit | 67adad3e08fe17d5f7e87468ea47aa76e1662255 (patch) | |
tree | 91314fac90d39254e66ae794decfcd21c10a7b20 /vendor/github.com/pelletier/go-toml/v2/internal/danger | |
parent | 2fca3c756373577eab4e0120ccce62eecc1f5ad8 (diff) | |
download | matterbridge-msglm-67adad3e08fe17d5f7e87468ea47aa76e1662255.tar.gz matterbridge-msglm-67adad3e08fe17d5f7e87468ea47aa76e1662255.tar.bz2 matterbridge-msglm-67adad3e08fe17d5f7e87468ea47aa76e1662255.zip |
Update dependencies (#1813)
Diffstat (limited to 'vendor/github.com/pelletier/go-toml/v2/internal/danger')
-rw-r--r-- | vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go | 65 | ||||
-rw-r--r-- | vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go | 23 |
2 files changed, 88 insertions, 0 deletions
diff --git a/vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go b/vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go new file mode 100644 index 00000000..e38e1131 --- /dev/null +++ b/vendor/github.com/pelletier/go-toml/v2/internal/danger/danger.go @@ -0,0 +1,65 @@ +package danger + +import ( + "fmt" + "reflect" + "unsafe" +) + +const maxInt = uintptr(int(^uint(0) >> 1)) + +func SubsliceOffset(data []byte, subslice []byte) int { + datap := (*reflect.SliceHeader)(unsafe.Pointer(&data)) + hlp := (*reflect.SliceHeader)(unsafe.Pointer(&subslice)) + + if hlp.Data < datap.Data { + panic(fmt.Errorf("subslice address (%d) is before data address (%d)", hlp.Data, datap.Data)) + } + offset := hlp.Data - datap.Data + + if offset > maxInt { + panic(fmt.Errorf("slice offset larger than int (%d)", offset)) + } + + intoffset := int(offset) + + if intoffset > datap.Len { + panic(fmt.Errorf("slice offset (%d) is farther than data length (%d)", intoffset, datap.Len)) + } + + if intoffset+hlp.Len > datap.Len { + panic(fmt.Errorf("slice ends (%d+%d) is farther than data length (%d)", intoffset, hlp.Len, datap.Len)) + } + + return intoffset +} + +func BytesRange(start []byte, end []byte) []byte { + if start == nil || end == nil { + panic("cannot call BytesRange with nil") + } + startp := (*reflect.SliceHeader)(unsafe.Pointer(&start)) + endp := (*reflect.SliceHeader)(unsafe.Pointer(&end)) + + if startp.Data > endp.Data { + panic(fmt.Errorf("start pointer address (%d) is after end pointer address (%d)", startp.Data, endp.Data)) + } + + l := startp.Len + endLen := int(endp.Data-startp.Data) + endp.Len + if endLen > l { + l = endLen + } + + if l > startp.Cap { + panic(fmt.Errorf("range length is larger than capacity")) + } + + return start[:l] +} + +func Stride(ptr unsafe.Pointer, size uintptr, offset int) unsafe.Pointer { + // TODO: replace with unsafe.Add when Go 1.17 is released + // https://github.com/golang/go/issues/40481 + return unsafe.Pointer(uintptr(ptr) + uintptr(int(size)*offset)) +} diff --git a/vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go b/vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go new file mode 100644 index 00000000..9d41c28a --- /dev/null +++ b/vendor/github.com/pelletier/go-toml/v2/internal/danger/typeid.go @@ -0,0 +1,23 @@ +package danger + +import ( + "reflect" + "unsafe" +) + +// typeID is used as key in encoder and decoder caches to enable using +// the optimize runtime.mapaccess2_fast64 function instead of the more +// expensive lookup if we were to use reflect.Type as map key. +// +// typeID holds the pointer to the reflect.Type value, which is unique +// in the program. +// +// https://github.com/segmentio/encoding/blob/master/json/codec.go#L59-L61 +type TypeID unsafe.Pointer + +func MakeTypeID(t reflect.Type) TypeID { + // reflect.Type has the fields: + // typ unsafe.Pointer + // ptr unsafe.Pointer + return TypeID((*[2]unsafe.Pointer)(unsafe.Pointer(&t))[1]) +} |