prosody
651e945ad971
util/serialization.lua

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util/serialization.lua @ 9271:651e945ad971

mod_vcard_legacy: Handle avatar without vcard4 Since vcards are just avatar containers in many modern clients, aborting in case of no vcard4 data is not optimal. The upgrade mechanism needs further tweaks.
author Kim Alvefur <zash@zash.se>
date Fri, 07 Sep 2018 01:04:53 +0200
parent 9060:69bc3144c2b7
child 9341:009dad867e52
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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 pcall = pcall;
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20 local envload = require"util.envload".envload;
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21
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22 local pos_inf, neg_inf = math.huge, -math.huge;
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23 local m_log = math.log;
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24 local m_log10 = math.log10 or function (n)
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25 return m_log(n, 10);
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26 end
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27 local m_floor = math.floor;
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28 -- luacheck: ignore 143/math
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29 local m_type = math.type or function (n)
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30 return n % 1 == 0 and n <= 9007199254740992 and n >= -9007199254740992 and "integer" or "float";
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31 end;
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32
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33 local char_to_hex = {};
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34 for i = 0,255 do
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35 char_to_hex[s_char(i)] = s_format("%02x", i);
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36 end
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37
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38 local function to_hex(s)
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39 return (s_gsub(s, ".", char_to_hex));
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40 end
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41
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42 local function fatal_error(obj, why)
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43 error("Can't serialize "..type(obj) .. (why and ": ".. why or ""));
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44 end
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45
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46 local function default_fallback(x, why)
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47 return s_format("nil --[[%s: %s]]", type(x), why or "fail");
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48 end
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49
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50 local string_escapes = {
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51 ['\a'] = [[\a]]; ['\b'] = [[\b]];
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52 ['\f'] = [[\f]]; ['\n'] = [[\n]];
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53 ['\r'] = [[\r]]; ['\t'] = [[\t]];
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54 ['\v'] = [[\v]]; ['\\'] = [[\\]];
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55 ['\"'] = [[\"]]; ['\''] = [[\']];
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56 }
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57
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58 for i = 0, 255 do
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59 local c = s_char(i);
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60 if not string_escapes[c] then
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61 string_escapes[c] = s_format("\\%03d", i);
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62 end
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63 end
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64
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65 local default_keywords = {
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66 ["do"] = true; ["and"] = true; ["else"] = true; ["break"] = true;
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67 ["if"] = true; ["end"] = true; ["goto"] = true; ["false"] = true;
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68 ["in"] = true; ["for"] = true; ["then"] = true; ["local"] = true;
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69 ["or"] = true; ["nil"] = true; ["true"] = true; ["until"] = true;
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70 ["elseif"] = true; ["function"] = true; ["not"] = true;
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71 ["repeat"] = true; ["return"] = true; ["while"] = true;
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72 };
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73
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74 local function new(opt)
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75 if type(opt) ~= "table" then
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76 opt = { preset = opt };
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77 end
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78
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79 local types = {
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80 table = true;
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81 string = true;
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82 number = true;
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83 boolean = true;
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84 ["nil"] = true;
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85 };
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86
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87 -- presets
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88 if opt.preset == "debug" then
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89 opt.preset = "oneline";
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90 opt.freeze = true;
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91 opt.fatal = false;
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92 opt.fallback = default_fallback;
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93 end
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94 if opt.preset == "oneline" then
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95 opt.indentwith = opt.indentwith or "";
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96 opt.itemstart = opt.itemstart or " ";
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97 opt.itemlast = opt.itemlast or "";
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98 opt.tend = opt.tend or " }";
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99 elseif opt.preset == "compact" then
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100 opt.indentwith = opt.indentwith or "";
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101 opt.itemstart = opt.itemstart or "";
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102 opt.itemlast = opt.itemlast or "";
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103 opt.equals = opt.equals or "=";
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104 end
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105
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106 local fallback = opt.fatal and fatal_error or opt.fallback or default_fallback;
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107
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108 local function ser(v)
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109 return (types[type(v)] or fallback)(v);
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110 end
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111
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112 local keywords = opt.keywords or default_keywords;
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113
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114 -- indented
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115 local indentwith = opt.indentwith or "\t";
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116 local itemstart = opt.itemstart or "\n";
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117 local itemsep = opt.itemsep or ";";
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118 local itemlast = opt.itemlast or ";\n";
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119 local tstart = opt.tstart or "{";
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120 local tend = opt.tend or "}";
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121 local kstart = opt.kstart or "[";
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122 local kend = opt.kend or "]";
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123 local equals = opt.equals or " = ";
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124 local unquoted = opt.unquoted == nil and "^[%a_][%w_]*$" or opt.unquoted;
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125 local hex = opt.hex;
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126 local freeze = opt.freeze;
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127 local precision = opt.precision or 10;
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128
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129 -- serialize one table, recursively
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130 -- t - table being serialized
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131 -- o - array where tokens are added, concatenate to get final result
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132 -- - also used to detect cycles
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133 -- l - position in o of where to insert next token
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134 -- d - depth, used for indentation
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135 local function serialize_table(t, o, l, d)
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136 if o[t] or d > 127 then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
137 o[l], l = fallback(t, "recursion"), l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
138 return l;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
139 end
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
140
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
141 o[t] = true;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
142 if freeze then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
143 -- opportunity to do pre-serialization
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
144 local mt = getmetatable(t);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
145 local fr = (freeze ~= true and freeze[mt]);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
146 local mf = mt and mt.__freeze;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
147 local tag;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
148 if type(fr) == "string" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
149 tag = fr;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
150 fr = mf;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
151 elseif mt then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
152 tag = mt.__type;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
153 end
9060
69bc3144c2b7 util.serialization: Tighten up type checks
Kim Alvefur <zash@zash.se>
parents: 9008
diff changeset
154 if type(fr) == "function" then
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
155 t = fr(t);
9060
69bc3144c2b7 util.serialization: Tighten up type checks
Kim Alvefur <zash@zash.se>
parents: 9008
diff changeset
156 if type(tag) == "string" then
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
157 o[l], l = tag, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
158 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
159 end
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 o[l], l = tstart, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
162 local indent = s_rep(indentwith, d);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
163 local numkey = 1;
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Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
164 local ktyp, vtyp;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
165 for k,v in next,t do
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
166 o[l], l = itemstart, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
167 o[l], l = indent, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
168 ktyp, vtyp = type(k), type(v);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
169 if k == numkey then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
170 -- next index in array part
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
171 -- assuming that these are found in order
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
172 numkey = numkey + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
173 elseif unquoted and ktyp == "string" and
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
174 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
175 -- unquoted keys
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
176 o[l], l = k, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
177 o[l], l = equals, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
178 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
179 -- quoted keys
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
180 o[l], l = kstart, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
181 if ktyp == "table" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
182 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
183 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
184 o[l], l = ser(k), l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
185 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
186 -- =
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
187 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
188 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
189
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
190 -- the value
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
191 if vtyp == "table" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
192 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
193 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
194 o[l], l = ser(v), l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
195 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
196 -- last item?
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
197 if next(t, k) ~= nil then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
198 o[l], l = itemsep, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
199 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
200 o[l], l = itemlast, l + 1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
201 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
202 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
203 if next(t) ~= nil then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
204 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
205 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
206 o[l], l = tend, l +1;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
207 return l;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
208 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
209
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
210 function types.table(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
211 local o = {};
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
212 serialize_table(t, o, 1, 1);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
213 return t_concat(o);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
214 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
215
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
216 local function serialize_string(s)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
217 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
218 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
219
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
220 if hex then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
221 function types.string(s)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
222 local esc = serialize_string(s);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
223 if #esc > (#s*2+2+#hex) then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
224 return hex .. '"' .. to_hex(s) .. '"';
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 return esc;
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 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
229 types.string = serialize_string;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
230 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
231
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
232 function types.number(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
233 if m_type(t) == "integer" then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
234 return s_format("%d", t);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
235 elseif t == pos_inf then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
236 return "(1/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
237 elseif t == neg_inf then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
238 return "(-1/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
239 elseif t ~= t then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
240 return "(0/0)";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
241 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
242 local log = m_floor(m_log10(t));
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
243 if log > precision then
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
244 return s_format("%.18e", t);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
245 else
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
246 return s_format("%.18g", t);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
247 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
248 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
249
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
250 -- Are these faster than tostring?
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
251 types["nil"] = function()
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
252 return "nil";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
253 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
254
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
255 function types.boolean(t)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
256 return t and "true" or "false";
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
257 end
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
258
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
259 return ser;
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
260 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
261
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
262 local function deserialize(str)
3736
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
263 if type(str) ~= "string" then return nil; end
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
264 str = "return "..str;
5021
85b2689dbcfe Eliminate direct setfenv usage
Florian Zeitz <florob@babelmonkeys.de>
parents: 3745
diff changeset
265 local f, err = envload(str, "@data", {});
3736
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
266 if not f then return nil, err; end
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
267 local success, ret = pcall(f);
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
268 if not success then return nil, ret; end
73399dd525e8 util.serialization: Implemented deserialize().
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
269 return ret;
546
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
270 end
1e65f64dfabf Added module util.serialization
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
271
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
272 return {
9008
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
273 new = new;
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
274 serialize = function (x, opt)
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
275 return new(opt)(x);
ae3c52419ec1 util.serialization: Rewritte for performance and flexibility
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
276 end;
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
277 deserialize = deserialize;
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
278 };