prosody
781772c8b6d9
util/human/io.lua

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util/human/io.lua @ 12630:781772c8b6d9

mod_mam: Store archives with sub-second precision timestamps Changes sub-second part of example timestamp to .5 in order to avoid floating point issues. Some clients use timestamps when ordering messages which can lead to messages having the same timestamp ending up in the wrong order. It would be better to preserve the order messages are sent in, which is the order they were stored in.
author Kim Alvefur <zash@zash.se>
date Sun, 14 Aug 2022 17:28:31 +0200
parent 12573:0f4feaf9ca64
child 12783:d513e4bd4928
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 local array = require "util.array";
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2 local utf8 = rawget(_G, "utf8") or require"util.encodings".utf8;
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3 local len = utf8.len or function(s)
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4 local _, count = s:gsub("[%z\001-\127\194-\253][\128-\191]*", "");
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5 return count;
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6 end;
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7
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8 local function getchar(n)
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9 local stty_ret = os.execute("stty raw -echo 2>/dev/null");
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10 local ok, char;
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11 if stty_ret == true or stty_ret == 0 then
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12 ok, char = pcall(io.read, n or 1);
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13 os.execute("stty sane");
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14 else
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15 ok, char = pcall(io.read, "*l");
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16 if ok then
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17 char = char:sub(1, n or 1);
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18 end
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19 end
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20 if ok then
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21 return char;
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22 end
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23 end
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24
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25 local function getline()
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26 local ok, line = pcall(io.read, "*l");
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27 if ok then
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28 return line;
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29 end
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30 end
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31
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32 local function getpass()
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33 local stty_ret = os.execute("stty -echo 2>/dev/null");
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34 if stty_ret ~= 0 then
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35 io.write("\027[08m"); -- ANSI 'hidden' text attribute
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36 end
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37 local ok, pass = pcall(io.read, "*l");
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38 if stty_ret == 0 then
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39 os.execute("stty sane");
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40 else
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41 io.write("\027[00m");
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42 end
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43 io.write("\n");
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44 if ok then
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45 return pass;
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46 end
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47 end
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48
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49 local function show_yesno(prompt)
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50 io.write(prompt, " ");
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51 local choice = getchar():lower();
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52 io.write("\n");
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53 if not choice:match("%a") then
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54 choice = prompt:match("%[.-(%U).-%]$");
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55 if not choice then return nil; end
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56 end
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57 return (choice == "y");
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58 end
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59
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60 local function read_password()
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61 local password;
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62 while true do
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63 io.write("Enter new password: ");
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64 password = getpass();
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65 if not password then
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66 print("No password - cancelled");
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67 return;
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68 end
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69 io.write("Retype new password: ");
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70 if getpass() ~= password then
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71 if not show_yesno [=[Passwords did not match, try again? [Y/n]]=] then
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72 return;
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73 end
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74 else
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75 break;
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76 end
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77 end
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78 return password;
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79 end
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80
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81 local function show_prompt(prompt)
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82 io.write(prompt, " ");
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83 local line = getline();
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84 line = line and line:gsub("\n$","");
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85 return (line and #line > 0) and line or nil;
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86 end
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87
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88 local function printf(fmt, ...)
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89 print(fmt:format(...));
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90 end
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91
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92 local function padright(s, width)
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93 return s..string.rep(" ", width-len(s));
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94 end
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95
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96 local function padleft(s, width)
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97 return string.rep(" ", width-len(s))..s;
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98 end
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99
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100 local pat = "[%z\001-\127\194-\253][\128-\191]*";
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101 local function utf8_cut(s, pos)
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102 return s:match("^"..pat:rep(pos)) or s;
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103 end
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104
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105 if utf8.len and utf8.offset then
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106 function utf8_cut(s, pos)
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107 return s:sub(1, utf8.offset(s, pos+1)-1);
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108 end
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109 end
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110
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111 local function ellipsis(s, width)
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112 if len(s) <= width then return s; end
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113 if width == 1 then return "…"; end
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114 return utf8_cut(s, width - 1) .. "…";
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115 end
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116
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117 local function new_table(col_specs, max_width)
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118 max_width = max_width or tonumber(os.getenv("COLUMNS")) or 80;
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119 local separator = " | ";
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120
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121 local widths = {};
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122 local total_width = max_width - #separator * (#col_specs-1);
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123 local free_width = total_width;
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124 -- Calculate width of fixed-size columns
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125 for i = 1, #col_specs do
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126 local width = col_specs[i].width or "0";
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127 if not(type(width) == "string" and width:sub(-1) == "%") then
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128 local title = col_specs[i].title;
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129 width = math.max(tonumber(width), title and (#title+1) or 0);
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130 widths[i] = width;
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131 free_width = free_width - width;
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132 if i > 1 then
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133 free_width = free_width - #separator;
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134 end
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135 end
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136 end
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137 -- Calculate width of %-based columns
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138 for i = 1, #col_specs do
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139 if not widths[i] then
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140 local pc_width = tonumber((col_specs[i].width:gsub("%%$", "")));
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141 widths[i] = math.floor(free_width*(pc_width/100));
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142 end
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143 end
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144
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145 return function (row)
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c7a0eab27165 util.human.io: table: Fix title printing when columns use named keys
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146 local titles;
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d15a4284fdf8 util.human.io: table: Return title row when no row data passed
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147 if not row then
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148 titles, row = true, array.pluck(col_specs, "title", "");
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149 end
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150 local output = {};
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151 for i, column in ipairs(col_specs) do
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152 local width = widths[i];
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153 local v = row[not titles and column.key or i];
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154 if not titles and column.mapper then
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155 v = column.mapper(v, row);
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156 end
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157 if v == nil then
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afef1e170de7 util.human.io: Support specifying column defaults in tables
Kim Alvefur <zash@zash.se>
parents: 11892
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158 v = column.default or "";
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159 else
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160 v = tostring(v);
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161 end
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parents: 11895
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162 if len(v) < width then
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163 if column.align == "right" then
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1eb83bc6f706 util.human.io: Fix right-alignment
Kim Alvefur <zash@zash.se>
parents: 10911
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164 v = padleft(v, width);
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165 else
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166 v = padright(v, width);
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167 end
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168 elseif len(v) > width then
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57106c61d104 util.human.io: Factor out ellipsis function
Kim Alvefur <zash@zash.se>
parents: 11893
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169 v = ellipsis(v, width);
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170 end
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171 table.insert(output, v);
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172 end
10907
6af28c756752 util.human.io: Draw a separator between columns
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173 return table.concat(output, separator);
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174 end;
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175 end
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176
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177 return {
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178 getchar = getchar;
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parents:
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179 getline = getline;
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parents:
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180 getpass = getpass;
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181 show_yesno = show_yesno;
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parents:
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182 read_password = read_password;
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183 show_prompt = show_prompt;
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parents:
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184 printf = printf;
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parents: 10872
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185 padleft = padleft;
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parents: 10872
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186 padright = padright;
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parents: 11893
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187 ellipsis = ellipsis;
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188 table = new_table;
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parents:
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189 };