1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148

use crate::slice::types::IceType;
use __private::TokenStream;
use quote::*;


#[derive(Clone, Debug)]
pub struct FunctionArgument {
    pub id: TokenStream,
    pub r#type: IceType,
    pub out: bool
}

impl FunctionArgument {
    pub fn new(id: TokenStream, r#type: IceType, out: bool) -> FunctionArgument {
        FunctionArgument {
            id: id,
            r#type: r#type,
            out: out
        }
    }

    pub fn pass_argument(&self) -> TokenStream {
        let id = &self.id;
        if self.out { 
            quote! { &mut #id }
        } else {
            if self.r#type.as_ref() {
                quote! { &#id }
            } else {
                quote! { #id }
            }
        }
    }

    pub fn token(&self) -> TokenStream {
        let id = &self.id;
        let out = if self.out { 
            Some(quote! { &mut })
        } else {
            if self.r#type.as_ref() {
                Some(quote! { & })
            } else {
                None 
            }

        };
        let typename = self.r#type.token();
        quote! { #id: #out #typename }
    }

    pub fn decode_request(&self) -> Option<TokenStream> {
        let id_token = &self.id;
        match self.r#type {
            IceType::Optional(_, _) => Some(quote! {
                let mut #id_token = None;
            }),
            _ => {                
                let type_token = &self.r#type.token_from();
                let mut_token = if self.out {
                    quote! { mut }
                } else {
                    quote! { }
                };
                Some(quote! {
                    let #mut_token #id_token = #type_token::from_bytes(&request.params.data[read_bytes as usize..request.params.data.len()], &mut read_bytes)?;
                })        
            }
        }
    }

    pub fn decode_optional_request(&self) -> Option<TokenStream> {
        let id_token = &self.id;
        let type_token = &self.r#type.token_from();
        match self.r#type {
            IceType::Optional(_, tag) => {
                Some(quote! {
                    let mut flag_bytes = 0;
                    match OptionalFlag::from_bytes(&request.params.data[read_bytes as usize..request.params.data.len()], &mut flag_bytes) {
                        Ok(flag) => {
                            if flag.tag == #tag {
                                #id_token = #type_token::from_bytes(&request.params.data[read_bytes as usize..request.params.data.len()], &mut read_bytes)?;
                            }
                        }
                        _ => {}
                    }
                })
            },
            _ => None,
        }
    }

    pub fn encode_output(&self) -> Option<TokenStream> {
        if self.out {
            let id_token = &self.id;
            match self.r#type {
                IceType::Optional(_, tag) => {
                    Some(quote! {
                        result.extend(OptionalWrapper::new(#tag, #id_token).to_bytes()?);
                    })
                }
                _ => {
                    Some(quote! {
                        result.extend(#id_token.to_bytes()?);
                    })
                }
            }
            
        } else {
            None
        }
    }

    pub fn serialize_output(&self) -> Option<TokenStream> {
        if self.out {
            let id_token = &self.id;
            let type_token = &self.r#type.token_from();
            Some(quote! {
                *#id_token = #type_token::from_bytes(&reply.body.data[read_bytes as usize..reply.body.data.len()], &mut read_bytes)?;
            })
        } else {
            None
        }
    }

    pub fn serialize_input(&self) -> Option<TokenStream> {
        let id_token = &self.id;
        if self.out {
            None
        } else {
            match &self.r#type {
                IceType::Optional(var_type, tag) => {
                    let option_type = var_type.token();
                    Some(quote! {
                        if let Some(value) = #id_token {
                            bytes.extend(OptionalFlag::new(#tag, #option_type::optional_type()).to_bytes()?);
                            bytes.extend(value.to_bytes()?);
                        }
                    })
                }
                _ => {
                    Some(quote! {
                        bytes.extend(#id_token.to_bytes()?);
                    })
                }
            }
        }
    }
}