Source

void pane_hexview_select_byte(hexview_t* hv, uint64_t byte) {
    int selected_row;
    int selected_col;

    if(byte < hv->data_offset)
        _throwerr("Trying to select byte outside of hexview. Byte: %llu, hexview data offset: %llu", byte, hv->data_offset);
    if(byte > hv->last_byte)
        _throwerr("Trying to select byte outside of hexview. Byte: %llu, hexview last byte: %llu", byte, hv->last_byte);

    cursor_move(hv->pane.row, hv->pane.col);
    printc("0x%0*llX", SHADE, -1, hv->offset_display_digits, byte);

    if(hv->highlight) {
        /* If different columns, repaint the column specifier */
        if(hv->selected_byte % 0x10 != byte % 0x10) {
            int col;

            /* Repaint the old column specifier */
            col = hv->pane.col + hv->offset_display_width + ( ( hv->selected_byte - hv->offset_alignment ) % 0x10 ) * 4;
            cursor_move(hv->pane.row, col);
            printc("%02X", SHADE, -1, hv->offset_alignment + ( hv->selected_byte - hv->offset_alignment ) % 0x10);

            /* Paint the new column specifier */
            col = hv->pane.col + hv->offset_display_width + ( ( byte - hv->offset_alignment ) % 0x10 ) * 4;
            cursor_move(hv->pane.row, col);
            printc("%02X", TINT, -1, hv->offset_alignment + ( byte - hv->offset_alignment ) % 0x10);
        }

        /* If different rows, repaint the row specifier */
        if( (hv->selected_byte - hv->offset_alignment) / 0x10 != (byte - hv->offset_alignment) / 0x10) {
            int row;

            /* Repaint the old row specifier */
            row = hv->pane.row + 2 + ( hv->selected_byte - hv->data_offset ) / 0x10;
            cursor_move(row, hv->pane.col);
            printc("0x%0*llX", SHADE, -1, hv->offset_display_digits, hv->data_offset + (( hv->selected_byte - hv->data_offset ) & ~0xF));

            /* Paint the new row specifier */
            row = hv->pane.row + 2 + ( byte - hv->data_offset ) / 0x10;
            cursor_move(row, hv->pane.col);
            printc("0x%0*llX", TINT, -1, hv->offset_display_digits, hv->data_offset + (( byte - hv->data_offset ) & ~0xF));
        }
    }


    /* Repaint the old selected byte */
    int color = (hv->selected_byte - hv->offset_alignment) % 2 ? TINT : -1;
    int byte_index = hv->selected_byte - hv->data_offset;
    selected_row = hv->pane.row + 2 + byte_index / 16;
    selected_col = hv->pane.col + hv->offset_display_width + (byte_index % 0x10) * 4;

    cursor_move(selected_row, selected_col);
    printc("%02X", color, -1, hv->file->data[hv->selected_byte]);


    /* Paint the new selected byte */
    color = (byte - hv->offset_alignment) % 2 ? TINT : -1;
    byte_index = byte - hv->data_offset;
    selected_row = hv->pane.row + 2 + byte_index / 16;
    selected_col = hv->pane.col + hv->offset_display_width + (byte_index % 0x10) * 4;

    cursor_move(selected_row, selected_col);
    printc("%02X", color, HOVER_COLOR, hv->file->data[byte]);
    hv->selected_byte = byte;

}