prosody
a378937103cb
util/serialization.lua

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util/serialization.lua @ 13240:a378937103cb

util.sql: Remove unused String() and Integer() functions According to MattJ, leftovers from an earlier vision for util.sql
author Kim Alvefur <zash@zash.se>
date Sat, 22 Jul 2023 14:55:27 +0200
parent 13131:03f1509a6105
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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Matthew Wild <mwild1@gmail.com>
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 -- Copyright (C) 2018 Kim Alvefur
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5 --
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b1885732e979 GPL->MIT!
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 local getmetatable = getmetatable;
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11 local next, type = next, type;
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12 local s_format = string.format;
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13 local s_gsub = string.gsub;
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14 local s_rep = string.rep;
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15 local s_char = string.char;
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16 local s_match = string.match;
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17 local t_concat = table.concat;
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18
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19 local to_hex = require "prosody.util.hex".to;
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20
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21 local pcall = pcall;
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22 local envload = require"prosody.util.envload".envload;
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23
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24 if not math.type then
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25 require "prosody.util.mathcompat"
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26 end
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27
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28 local pos_inf, neg_inf = math.huge, -math.huge;
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29 local m_type = math.type;
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30
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31 local function rawpairs(t)
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32 return next, t, nil;
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33 end
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34
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35 local function fatal_error(obj, why)
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36 error("Can't serialize "..type(obj) .. (why and ": ".. why or ""));
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37 end
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38
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39 local function nonfatal_fallback(x, why)
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40 return s_format("{__type=%q,__error=%q}", type(x), why or "fail");
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41 end
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42
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43 local string_escapes = {
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44 ['\a'] = [[\a]]; ['\b'] = [[\b]];
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45 ['\f'] = [[\f]]; ['\n'] = [[\n]];
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46 ['\r'] = [[\r]]; ['\t'] = [[\t]];
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47 ['\v'] = [[\v]]; ['\\'] = [[\\]];
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48 ['\"'] = [[\"]]; ['\''] = [[\']];
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49 }
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50
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51 for i = 0, 255 do
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52 local c = s_char(i);
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53 if not string_escapes[c] then
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54 string_escapes[c] = s_format("\\%03d", i);
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55 end
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56 end
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57
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58 local default_keywords = {
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59 ["do"] = true; ["and"] = true; ["else"] = true; ["break"] = true;
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60 ["if"] = true; ["end"] = true; ["goto"] = true; ["false"] = true;
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61 ["in"] = true; ["for"] = true; ["then"] = true; ["local"] = true;
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62 ["or"] = true; ["nil"] = true; ["true"] = true; ["until"] = true;
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63 ["elseif"] = true; ["function"] = true; ["not"] = true;
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64 ["repeat"] = true; ["return"] = true; ["while"] = true;
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65 };
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66
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67 local function new(opt)
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68 if type(opt) ~= "table" then
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69 opt = { preset = opt };
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70 end
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71
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72 local types = {
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73 table = true;
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74 string = true;
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75 number = true;
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76 boolean = true;
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77 ["nil"] = true;
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78 };
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79
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80 -- presets
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81 if opt.preset == "debug" then
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82 opt.preset = "oneline";
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83 opt.freeze = true;
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84 opt.fatal = false;
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85 opt.fallback = nonfatal_fallback;
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86 opt.unquoted = true;
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87 end
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88 if opt.preset == "oneline" then
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89 opt.indentwith = opt.indentwith or "";
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90 opt.itemstart = opt.itemstart or " ";
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91 opt.itemlast = opt.itemlast or "";
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92 opt.tend = opt.tend or " }";
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93 elseif opt.preset == "compact" then
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94 opt.indentwith = opt.indentwith or "";
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95 opt.itemstart = opt.itemstart or "";
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96 opt.itemlast = opt.itemlast or "";
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97 opt.equals = opt.equals or "=";
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98 opt.unquoted = true;
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99 elseif opt.preset == "pretty" then
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100 opt.fatal = false;
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101 opt.freeze = true;
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102 opt.unquoted = true;
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103 end
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104
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105 local fallback = opt.fallback or opt.fatal == false and nonfatal_fallback or fatal_error;
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106
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107 local function ser(v)
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108 return (types[type(v)] or fallback)(v);
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109 end
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110
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111 local keywords = opt.keywords or default_keywords;
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112
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113 -- indented
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114 local indentwith = opt.indentwith or "\t";
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115 local itemstart = opt.itemstart or "\n";
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116 local itemsep = opt.itemsep or ";";
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117 local itemlast = opt.itemlast or ";\n";
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118 local tstart = opt.tstart or "{";
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119 local tend = opt.tend or "}";
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120 local kstart = opt.kstart or "[";
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121 local kend = opt.kend or "]";
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122 local equals = opt.equals or " = ";
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123 local unquoted = opt.unquoted == true and "^[%a_][%w_]*$" or opt.unquoted;
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124 local hex = opt.hex;
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125 local freeze = opt.freeze;
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126 local maxdepth = opt.maxdepth or 127;
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127 local multirefs = opt.multiref;
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128 local table_pairs = opt.table_iterator or rawpairs;
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129
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130 -- serialize one table, recursively
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131 -- t - table being serialized
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132 -- o - array where tokens are added, concatenate to get final result
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133 -- - also used to detect cycles
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134 -- l - position in o of where to insert next token
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135 -- d - depth, used for indentation
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
136 local function serialize_table(t, o, l, d)
9565
9a1e2f5f674f util.serialization: Separate errors for multiple table references and max depth
Kim Alvefur <zash@zash.se>
parents: 9564
diff changeset
137 if o[t] then
9a1e2f5f674f util.serialization: Separate errors for multiple table references and max depth
Kim Alvefur <zash@zash.se>
parents: 9564
diff changeset
138 o[l], l = fallback(t, "table has multiple references"), l + 1;
9a1e2f5f674f util.serialization: Separate errors for multiple table references and max depth
Kim Alvefur <zash@zash.se>
parents: 9564
diff changeset
139 return l;
9a1e2f5f674f util.serialization: Separate errors for multiple table references and max depth
Kim Alvefur <zash@zash.se>
parents: 9564
diff changeset
140 elseif d > maxdepth then
9a1e2f5f674f util.serialization: Separate errors for multiple table references and max depth
Kim Alvefur <zash@zash.se>
parents: 9564
diff changeset
141 o[l], l = fallback(t, "max table depth reached"), l + 1;
9008
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
142 return l;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
143 end
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
144
9567
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
145 -- Keep track of table loops
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
146 local ot = t; -- reference pre-freeze
9008
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147 o[t] = true;
9567
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parents: 9565
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148 o[ot] = true;
9485
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parents: 9484
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149
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parents: 9484
diff changeset
150 if freeze == true then
9008
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parents: 8555
diff changeset
151 -- opportunity to do pre-serialization
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Kim Alvefur <zash@zash.se>
parents: 8555
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152 local mt = getmetatable(t);
9485
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parents: 9484
diff changeset
153 if type(mt) == "table" then
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Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
154 local tag = mt.__name;
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Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
155 local fr = mt.__freeze;
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parents: 9484
diff changeset
156
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
157 if type(fr) == "function" then
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
158 t = fr(t);
11093
ec14d4fce855 util.serialization: Let freeze metamethod return a literal string
Kim Alvefur <zash@zash.se>
parents: 10061
diff changeset
159 if type(t) == "string" then
ec14d4fce855 util.serialization: Let freeze metamethod return a literal string
Kim Alvefur <zash@zash.se>
parents: 10061
diff changeset
160 o[l], l = t, l + 1;
ec14d4fce855 util.serialization: Let freeze metamethod return a literal string
Kim Alvefur <zash@zash.se>
parents: 10061
diff changeset
161 return l;
ec14d4fce855 util.serialization: Let freeze metamethod return a literal string
Kim Alvefur <zash@zash.se>
parents: 10061
diff changeset
162 end
9485
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
163 if type(tag) == "string" then
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
164 o[l], l = tag, l + 1;
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
165 end
9008
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Kim Alvefur <zash@zash.se>
parents: 8555
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166 end
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
167 end
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
168 end
9485
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parents: 9484
diff changeset
169
9008
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170 o[l], l = tstart, l + 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
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171 local indent = s_rep(indentwith, d);
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
172 local numkey = 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
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173 local ktyp, vtyp;
9863
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
174 local had_items = false;
9864
9d80e679c371 util.serialization: Allow overriding table iterator
Kim Alvefur <zash@zash.se>
parents: 9863
diff changeset
175 for k,v in table_pairs(t) do
9863
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
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176 had_items = true;
9008
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
177 o[l], l = itemstart, l + 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
178 o[l], l = indent, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
179 ktyp, vtyp = type(k), type(v);
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
180 if k == numkey then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
181 -- next index in array part
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
182 -- assuming that these are found in order
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
183 numkey = numkey + 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
184 elseif unquoted and ktyp == "string" and
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
185 not keywords[k] and s_match(k, unquoted) then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
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parents: 8555
diff changeset
186 -- unquoted keys
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
187 o[l], l = k, l + 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
188 o[l], l = equals, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
189 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
190 -- quoted keys
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
191 o[l], l = kstart, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
192 if ktyp == "table" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
193 l = serialize_table(k, o, l, d+1);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
194 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
195 o[l], l = ser(k), l + 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
196 end
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
197 -- =
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
198 o[l], o[l+1], l = kend, equals, l + 2;
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
199 end
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
200
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
201 -- the value
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
202 if vtyp == "table" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
203 l = serialize_table(v, o, l, d+1);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
204 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
205 o[l], l = ser(v), l + 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
206 end
9863
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
207 o[l], l = itemsep, l + 1;
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
208 end
9863
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
209 if had_items then
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
210 o[l - 1] = itemlast;
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
211 o[l], l = s_rep(indentwith, d-1), l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
212 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
213 o[l], l = tend, l +1;
9567
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
214
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
215 if multirefs then
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
216 o[t] = nil;
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
217 o[ot] = nil;
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
218 end
dbfa286cfa88 util.serialization: Add option for allowing multiple references to the same table (but not cycles)
Kim Alvefur <zash@zash.se>
parents: 9565
diff changeset
219
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
220 return l;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
221 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
222
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
223 function types.table(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
224 local o = {};
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
225 serialize_table(t, o, 1, 1);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
226 return t_concat(o);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
227 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
228
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
229 local function serialize_string(s)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
230 return '"' .. s_gsub(s, "[%z\1-\31\"\'\\\127-\255]", string_escapes) .. '"';
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
231 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
232
9483
903e0cfd4cc9 util.serialization: Make check of prefix for optional hex encoding stricter
Kim Alvefur <zash@zash.se>
parents: 9480
diff changeset
233 if type(hex) == "string" then
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
234 function types.string(s)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
235 local esc = serialize_string(s);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
236 if #esc > (#s*2+2+#hex) then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
237 return hex .. '"' .. to_hex(s) .. '"';
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
238 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
239 return esc;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
240 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
241 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
242 types.string = serialize_string;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
243 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
244
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
245 function types.number(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
246 if m_type(t) == "integer" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
247 return s_format("%d", t);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
248 elseif t == pos_inf then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
249 return "(1/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
250 elseif t == neg_inf then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
251 return "(-1/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
252 elseif t ~= t then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
253 return "(0/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
254 end
9486
20aad0108999 util.serialization: Remove encoding of very large or very small numbers in scientific notation
Kim Alvefur <zash@zash.se>
parents: 9485
diff changeset
255 return s_format("%.18g", t);
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
256 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
257
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
258 -- Are these faster than tostring?
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
259 types["nil"] = function()
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
260 return "nil";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
261 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
262
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
263 function types.boolean(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
264 return t and "true" or "false";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
265 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
266
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
267 return ser;
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
268 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
269
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6670
diff changeset
270 local function deserialize(str)
3736
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
271 if type(str) ~= "string" then return nil; end
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
272 str = "return "..str;
9484
1d1541630c20 util.serialization: Use '=' prefix for chunk source description
Kim Alvefur <zash@zash.se>
parents: 9483
diff changeset
273 local f, err = envload(str, "=serialized data", {});
3736
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
274 if not f then return nil, err; end
73399dd525e8 util.serialization: Implemented deserialize().
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275 local success, ret = pcall(f);
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276 if not success then return nil, ret; end
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277 return ret;
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278 end
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279
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280 local default = new();
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281 return {
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282 new = new;
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283 serialize = function (x, opt)
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284 if opt == nil then
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285 return default(x);
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286 else
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287 return new(opt)(x);
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288 end
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289 end;
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290 deserialize = deserialize;
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291 };