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add hex stuff, remove old wasi benchmark folder
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colindickson committed Jan 9, 2024
1 parent a20d07e commit 36ce898
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Showing 5 changed files with 61 additions and 80 deletions.
7 changes: 0 additions & 7 deletions wasm/bench/substreams_wasi/wasi_hello_world/Cargo.lock

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8 changes: 0 additions & 8 deletions wasm/bench/substreams_wasi/wasi_hello_world/Cargo.toml

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65 changes: 0 additions & 65 deletions wasm/bench/substreams_wasi/wasi_hello_world/src/main.rs

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61 changes: 61 additions & 0 deletions wasm/wasi/substreams/hex.go
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package substreams

import (
"bytes"
"io"
)

var LowerHexBytes = [256]string{
"00", "01", "02", "03", "04", "05", "06", "07", "08", "09", "0a", "0b", "0c", "0d", "0e", "0f",
"10", "11", "12", "13", "14", "15", "16", "17", "18", "19", "1a", "1b", "1c", "1d", "1e", "1f",
"20", "21", "22", "23", "24", "25", "26", "27", "28", "29", "2a", "2b", "2c", "2d", "2e", "2f",
"30", "31", "32", "33", "34", "35", "36", "37", "38", "39", "3a", "3b", "3c", "3d", "3e", "3f",
"40", "41", "42", "43", "44", "45", "46", "47", "48", "49", "4a", "4b", "4c", "4d", "4e", "4f",
"50", "51", "52", "53", "54", "55", "56", "57", "58", "59", "5a", "5b", "5c", "5d", "5e", "5f",
"60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "6a", "6b", "6c", "6d", "6e", "6f",
"70", "71", "72", "73", "74", "75", "76", "77", "78", "79", "7a", "7b", "7c", "7d", "7e", "7f",
"80", "81", "82", "83", "84", "85", "86", "87", "88", "89", "8a", "8b", "8c", "8d", "8e", "8f",
"90", "91", "92", "93", "94", "95", "96", "97", "98", "99", "9a", "9b", "9c", "9d", "9e", "9f",
"a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", "a8", "a9", "aa", "ab", "ac", "ad", "ae", "af",
"b0", "b1", "b2", "b3", "b4", "b5", "b6", "b7", "b8", "b9", "ba", "bb", "bc", "bd", "be", "bf",
"c0", "c1", "c2", "c3", "c4", "c5", "c6", "c7", "c8", "c9", "ca", "cb", "cc", "cd", "ce", "cf",
"d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "d8", "d9", "da", "db", "dc", "dd", "de", "df",
"e0", "e1", "e2", "e3", "e4", "e5", "e6", "e7", "e8", "e9", "ea", "eb", "ec", "ed", "ee", "ef",
"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", "f8", "f9", "fa", "fb", "fc", "fd", "fe", "ff",
}

// RemoveHexPrefix removes the "0x" prefix from a byte slice.
func RemoveHexPrefix(data []byte) []byte {
if len(data) >= 2 && data[0] == '0' && data[1] == 'x' {
return data[2:]
}
return data
}

// WriteLowerHex writes the hexadecimal representation of a byte slice.
func WriteLowerHex(input []byte, w io.Writer) error {
for _, b := range input {
if _, err := w.Write([]byte(LowerHexBytes[b])); err != nil {
return err
}
}
return nil
}

// EncodeLowerHex encodes the input byte slice into a lower hexadecimal string.
func EncodeLowerHex(input []byte) string {
if len(input) == 0 {
return ""
}

var buffer bytes.Buffer
buffer.Grow(len(input) * 2) // Each byte will be represented by two hexadecimal characters

err := WriteLowerHex(input, &buffer)
if err != nil {
// Since we're working with a pre-allocated buffer, this error should not occur
panic("non-fallible pre-allocated buffer")
}

return buffer.String()
}

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