prosody
0.12.3
util/serialization.lua

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util/serialization.lua @ 12894:0598d822614f 0.12 0.12.3

mod_websocket: Fire pre-session-close event (fixes #1800) This event was added in a7c183bb4e64 and is required to make mod_smacks know that a session was intentionally closed and shouldn't be hibernated (see fcea4d9e7502). Because this was missing from mod_websocket's session.close(), mod_smacks would always attempt to hibernate websocket sessions even if they closed cleanly. That mod_websocket has its own copy of session.close() is something to fix another day (probably not in the stable branch). So for now this commit makes the minimal change to get things working again. Thanks to Damian and the Jitsi team for reporting.
author Matthew Wild <mwild1@gmail.com>
date Mon, 20 Feb 2023 18:10:15 +0000
parent 11093:ec14d4fce855
child 12781:22066b02887f
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rev   line source
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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 "util.hex".to;
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20
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21 local pcall = pcall;
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22 local envload = require"util.envload".envload;
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23
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24 local pos_inf, neg_inf = math.huge, -math.huge;
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25 local m_type = math.type or function (n)
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26 return n % 1 == 0 and n <= 9007199254740992 and n >= -9007199254740992 and "integer" or "float";
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27 end;
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28
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29 local function rawpairs(t)
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30 return next, t, nil;
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31 end
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32
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33 local function fatal_error(obj, why)
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34 error("Can't serialize "..type(obj) .. (why and ": ".. why or ""));
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35 end
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36
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37 local function nonfatal_fallback(x, why)
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38 return s_format("{__type=%q,__error=%q}", type(x), why or "fail");
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39 end
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40
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41 local string_escapes = {
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42 ['\a'] = [[\a]]; ['\b'] = [[\b]];
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43 ['\f'] = [[\f]]; ['\n'] = [[\n]];
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44 ['\r'] = [[\r]]; ['\t'] = [[\t]];
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45 ['\v'] = [[\v]]; ['\\'] = [[\\]];
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46 ['\"'] = [[\"]]; ['\''] = [[\']];
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47 }
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48
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49 for i = 0, 255 do
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50 local c = s_char(i);
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51 if not string_escapes[c] then
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52 string_escapes[c] = s_format("\\%03d", i);
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53 end
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54 end
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55
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56 local default_keywords = {
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57 ["do"] = true; ["and"] = true; ["else"] = true; ["break"] = true;
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58 ["if"] = true; ["end"] = true; ["goto"] = true; ["false"] = true;
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59 ["in"] = true; ["for"] = true; ["then"] = true; ["local"] = true;
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60 ["or"] = true; ["nil"] = true; ["true"] = true; ["until"] = true;
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61 ["elseif"] = true; ["function"] = true; ["not"] = true;
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62 ["repeat"] = true; ["return"] = true; ["while"] = true;
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63 };
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64
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65 local function new(opt)
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66 if type(opt) ~= "table" then
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67 opt = { preset = opt };
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68 end
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69
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70 local types = {
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71 table = true;
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72 string = true;
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73 number = true;
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74 boolean = true;
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75 ["nil"] = true;
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76 };
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77
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78 -- presets
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79 if opt.preset == "debug" then
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80 opt.preset = "oneline";
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81 opt.freeze = true;
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82 opt.fatal = false;
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83 opt.fallback = nonfatal_fallback;
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84 opt.unquoted = true;
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85 end
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86 if opt.preset == "oneline" then
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87 opt.indentwith = opt.indentwith or "";
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88 opt.itemstart = opt.itemstart or " ";
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89 opt.itemlast = opt.itemlast or "";
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90 opt.tend = opt.tend or " }";
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91 elseif opt.preset == "compact" then
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92 opt.indentwith = opt.indentwith or "";
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93 opt.itemstart = opt.itemstart or "";
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94 opt.itemlast = opt.itemlast or "";
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95 opt.equals = opt.equals or "=";
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96 opt.unquoted = true;
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97 end
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98
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99 local fallback = opt.fallback or opt.fatal == false and nonfatal_fallback or fatal_error;
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100
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101 local function ser(v)
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102 return (types[type(v)] or fallback)(v);
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103 end
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104
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105 local keywords = opt.keywords or default_keywords;
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106
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107 -- indented
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108 local indentwith = opt.indentwith or "\t";
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109 local itemstart = opt.itemstart or "\n";
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110 local itemsep = opt.itemsep or ";";
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111 local itemlast = opt.itemlast or ";\n";
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112 local tstart = opt.tstart or "{";
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113 local tend = opt.tend or "}";
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114 local kstart = opt.kstart or "[";
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115 local kend = opt.kend or "]";
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116 local equals = opt.equals or " = ";
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117 local unquoted = opt.unquoted == true and "^[%a_][%w_]*$" or opt.unquoted;
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118 local hex = opt.hex;
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119 local freeze = opt.freeze;
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120 local maxdepth = opt.maxdepth or 127;
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121 local multirefs = opt.multiref;
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122 local table_pairs = opt.table_iterator or rawpairs;
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123
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124 -- serialize one table, recursively
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125 -- t - table being serialized
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126 -- o - array where tokens are added, concatenate to get final result
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127 -- - also used to detect cycles
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128 -- l - position in o of where to insert next token
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129 -- d - depth, used for indentation
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130 local function serialize_table(t, o, l, d)
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131 if o[t] then
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132 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
133 return l;
9a1e2f5f674f util.serialization: Separate errors for multiple table references and max depth
Kim Alvefur <zash@zash.se>
parents: 9564
diff changeset
134 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
135 o[l], l = fallback(t, "max table depth reached"), l + 1;
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
136 return l;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
137 end
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
138
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
139 -- 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
140 local ot = t; -- reference pre-freeze
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
141 o[t] = true;
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
142 o[ot] = true;
9485
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
143
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
144 if freeze == true then
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
145 -- opportunity to do pre-serialization
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
146 local mt = getmetatable(t);
9485
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
147 if type(mt) == "table" then
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
148 local tag = mt.__name;
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
149 local fr = mt.__freeze;
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
150
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
151 if type(fr) == "function" then
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
152 t = fr(t);
11093
ec14d4fce855 util.serialization: Let freeze metamethod return a literal string
Kim Alvefur <zash@zash.se>
parents: 10061
diff changeset
153 if type(t) == "string" then
ec14d4fce855 util.serialization: Let freeze metamethod return a literal string
Kim Alvefur <zash@zash.se>
parents: 10061
diff changeset
154 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
155 return l;
ec14d4fce855 util.serialization: Let freeze metamethod return a literal string
Kim Alvefur <zash@zash.se>
parents: 10061
diff changeset
156 end
9485
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
157 if type(tag) == "string" then
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
158 o[l], l = tag, l + 1;
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
159 end
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
160 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
161 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
162 end
9485
c667887d78ad util.serialization: Simpler metatable pre-processing
Kim Alvefur <zash@zash.se>
parents: 9484
diff changeset
163
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
164 o[l], l = tstart, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
165 local indent = s_rep(indentwith, d);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
166 local numkey = 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
167 local ktyp, vtyp;
9863
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
168 local had_items = false;
9864
9d80e679c371 util.serialization: Allow overriding table iterator
Kim Alvefur <zash@zash.se>
parents: 9863
diff changeset
169 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
diff changeset
170 had_items = true;
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
171 o[l], l = itemstart, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
172 o[l], l = indent, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
173 ktyp, vtyp = type(k), type(v);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
174 if k == numkey then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
175 -- next index in array part
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
176 -- assuming that these are found in order
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
177 numkey = numkey + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
178 elseif unquoted and ktyp == "string" and
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
179 not keywords[k] and s_match(k, unquoted) then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
180 -- unquoted keys
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
181 o[l], l = k, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
182 o[l], l = equals, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
183 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
184 -- quoted keys
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
185 o[l], l = kstart, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
186 if ktyp == "table" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
187 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
188 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
189 o[l], l = ser(k), l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
190 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
191 -- =
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
192 o[l], o[l+1], l = kend, equals, l + 2;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
193 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
194
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
195 -- the value
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
196 if vtyp == "table" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
197 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
198 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
199 o[l], l = ser(v), l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
200 end
9863
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
201 o[l], l = itemsep, l + 1;
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
202 end
9863
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
203 if had_items then
aebfd1601ae2 util.serialization: Optimize handling of last table separator
Kim Alvefur <zash@zash.se>
parents: 9692
diff changeset
204 o[l - 1] = itemlast;
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
205 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
206 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
207 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
208
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
209 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
210 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
211 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
212 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
213
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
214 return l;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
215 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
216
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
217 function types.table(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
218 local o = {};
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
219 serialize_table(t, o, 1, 1);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
220 return t_concat(o);
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 local function serialize_string(s)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
224 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
225 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
226
9483
903e0cfd4cc9 util.serialization: Make check of prefix for optional hex encoding stricter
Kim Alvefur <zash@zash.se>
parents: 9480
diff changeset
227 if type(hex) == "string" then
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
228 function types.string(s)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
229 local esc = serialize_string(s);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
230 if #esc > (#s*2+2+#hex) then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
231 return hex .. '"' .. to_hex(s) .. '"';
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
232 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
233 return esc;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
234 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
235 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
236 types.string = serialize_string;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
237 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
238
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
239 function types.number(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
240 if m_type(t) == "integer" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
241 return s_format("%d", t);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
242 elseif t == pos_inf then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
243 return "(1/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
244 elseif t == neg_inf then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
245 return "(-1/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
246 elseif t ~= t then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
247 return "(0/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
248 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
249 return s_format("%.18g", t);
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
250 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
251
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
252 -- Are these faster than tostring?
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
253 types["nil"] = function()
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
254 return "nil";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
255 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
256
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
257 function types.boolean(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
258 return t and "true" or "false";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
259 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
260
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
261 return ser;
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
262 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
263
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
264 local function deserialize(str)
3736
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
265 if type(str) ~= "string" then return nil; end
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
266 str = "return "..str;
9484
1d1541630c20 util.serialization: Use '=' prefix for chunk source description
Kim Alvefur <zash@zash.se>
parents: 9483
diff changeset
267 local f, err = envload(str, "=serialized data", {});
3736
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
268 if not f then return nil, err; end
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
269 local success, ret = pcall(f);
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
270 if not success then return nil, ret; end
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
271 return ret;
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
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272 end
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273
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274 local default = new();
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275 return {
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276 new = new;
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277 serialize = function (x, opt)
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278 if opt == nil then
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279 return default(x);
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280 else
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281 return new(opt)(x);
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282 end
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283 end;
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284 deserialize = deserialize;
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285 };