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MuntashirAkon/hexify.cpp

Created January 29, 2022 17:52
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  1. MuntashirAkon created this gist Jan 29, 2022.
    26 changes: 26 additions & 0 deletions hexify.cpp
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,26 @@
    // Get a byte array as a hexadecimal character string
    int hexify(const uint8_t *in, size_t in_size, char *out, size_t out_size) {
    if (in_size == 0 || out_size == 0) return 0;

    char map[16+1] = "0123456789ABCDEF";

    int bytes_written = 0;
    size_t i = 0;
    while(i < in_size && (i*2 + (2+1)) <= out_size)
    {
    uint8_t high_nibble = (in[i] & 0xF0) >> 4;
    *out = map[high_nibble];
    out++;

    uint8_t low_nibble = in[i] & 0x0F;
    *out = map[low_nibble];
    out++;

    i++;

    bytes_written += 2;
    }
    *out = '\0';

    return bytes_written;
    }