prosody
9500625ecac9
util/format.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/format.lua @ 11259:9500625ecac9

doap: XEP-0004 Multiple Items in Form Results is not supported
author Kim Alvefur <zash@zash.se>
date Tue, 29 Dec 2020 21:35:48 +0100
parent 10035:386f085820e6
child 11638:5f4a657136bc
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
1 --
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
2 -- A string.format wrapper that gracefully handles invalid arguments
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
3 --
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
4
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
5 local tostring = tostring;
8417
e88db5668cfb util.format: Import unpack from table lib in Lua 5.2+
Kim Alvefur <zash@zash.se>
parents: 8383
diff changeset
6 local unpack = table.unpack or unpack; -- luacheck: ignore 113/unpack
9687
8c92ef4270c9 util.format: Use pack from util.table
Kim Alvefur <zash@zash.se>
parents: 9656
diff changeset
7 local pack = require "util.table".pack; -- TODO table.pack in 5.2+
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
8 local type = type;
9693
6ed0d6224d64 util.format: Serialize values for the %q format
Kim Alvefur <zash@zash.se>
parents: 9687
diff changeset
9 local dump = require "util.serialization".new("debug");
10035
386f085820e6 util.format: Handle integer formats the same way on Lua versions without integer support
Kim Alvefur <zash@zash.se>
parents: 10034
diff changeset
10 local num_type = math.type or function (n)
386f085820e6 util.format: Handle integer formats the same way on Lua versions without integer support
Kim Alvefur <zash@zash.se>
parents: 10034
diff changeset
11 return n % 1 == 0 and n <= 9007199254740992 and n >= -9007199254740992 and "integer" or "float";
386f085820e6 util.format: Handle integer formats the same way on Lua versions without integer support
Kim Alvefur <zash@zash.se>
parents: 10034
diff changeset
12 end
10034
4fca92d60040 util.format: Handle formats expecting an integer in Lua 5.3+ (fixes #1371)
Kim Alvefur <zash@zash.se>
parents: 9693
diff changeset
13
10035
386f085820e6 util.format: Handle integer formats the same way on Lua versions without integer support
Kim Alvefur <zash@zash.se>
parents: 10034
diff changeset
14 -- In Lua 5.3+ these formats throw an error if given a float
386f085820e6 util.format: Handle integer formats the same way on Lua versions without integer support
Kim Alvefur <zash@zash.se>
parents: 10034
diff changeset
15 local expects_integer = { c = true, d = true, i = true, o = true, u = true, X = true, x = true, };
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
16
8382
e5d00bf4a4d5 util: Various minor changes to please [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8225
diff changeset
17 local function format(formatstring, ...)
9687
8c92ef4270c9 util.format: Use pack from util.table
Kim Alvefur <zash@zash.se>
parents: 9656
diff changeset
18 local args = pack(...);
8c92ef4270c9 util.format: Use pack from util.table
Kim Alvefur <zash@zash.se>
parents: 9656
diff changeset
19 local args_length = args.n;
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
20
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
21 -- format specifier spec:
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
22 -- 1. Start: '%%'
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
23 -- 2. Flags: '[%-%+ #0]'
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
24 -- 3. Width: '%d?%d?'
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
25 -- 4. Precision: '%.?%d?%d?'
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
26 -- 5. Option: '[cdiouxXaAeEfgGqs%%]'
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
27 --
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
28 -- The options c, d, E, e, f, g, G, i, o, u, X, and x all expect a number as argument, whereas q and s expect a string.
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
29 -- This function does not accept string values containing embedded zeros, except as arguments to the q option.
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
30 -- a and A are only in Lua 5.2+
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
31
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
32
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
33 -- process each format specifier
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
34 local i = 0;
8382
e5d00bf4a4d5 util: Various minor changes to please [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8225
diff changeset
35 formatstring = formatstring:gsub("%%[^cdiouxXaAeEfgGqs%%]*[cdiouxXaAeEfgGqs%%]", function(spec)
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
36 if spec ~= "%%" then
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
37 i = i + 1;
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
38 local arg = args[i];
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
39
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
40 local option = spec:sub(-1);
9656
3da6cc927ee6 util.format: Tweak how nil values are handled
Kim Alvefur <zash@zash.se>
parents: 8417
diff changeset
41 if arg == nil then
3da6cc927ee6 util.format: Tweak how nil values are handled
Kim Alvefur <zash@zash.se>
parents: 8417
diff changeset
42 args[i] = "nil";
3da6cc927ee6 util.format: Tweak how nil values are handled
Kim Alvefur <zash@zash.se>
parents: 8417
diff changeset
43 spec = "<%s>";
9693
6ed0d6224d64 util.format: Serialize values for the %q format
Kim Alvefur <zash@zash.se>
parents: 9687
diff changeset
44 elseif option == "q" then
6ed0d6224d64 util.format: Serialize values for the %q format
Kim Alvefur <zash@zash.se>
parents: 9687
diff changeset
45 args[i] = dump(arg);
6ed0d6224d64 util.format: Serialize values for the %q format
Kim Alvefur <zash@zash.se>
parents: 9687
diff changeset
46 spec = "%s";
6ed0d6224d64 util.format: Serialize values for the %q format
Kim Alvefur <zash@zash.se>
parents: 9687
diff changeset
47 elseif option == "s" then
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
48 args[i] = tostring(arg);
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
49 elseif type(arg) ~= "number" then -- arg isn't number as expected?
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
50 args[i] = tostring(arg);
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
51 spec = "[%s]";
10034
4fca92d60040 util.format: Handle formats expecting an integer in Lua 5.3+ (fixes #1371)
Kim Alvefur <zash@zash.se>
parents: 9693
diff changeset
52 elseif expects_integer[option] and num_type(arg) ~= "integer" then
4fca92d60040 util.format: Handle formats expecting an integer in Lua 5.3+ (fixes #1371)
Kim Alvefur <zash@zash.se>
parents: 9693
diff changeset
53 args[i] = tostring(arg);
4fca92d60040 util.format: Handle formats expecting an integer in Lua 5.3+ (fixes #1371)
Kim Alvefur <zash@zash.se>
parents: 9693
diff changeset
54 spec = "[%s]";
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
55 end
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
56 end
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
57 return spec;
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
58 end);
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
59
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
60 -- process extra args
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
61 while i < args_length do
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
62 i = i + 1;
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
63 local arg = args[i];
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
64 if arg == nil then
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
65 args[i] = "<nil>";
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
66 else
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
67 args[i] = tostring(arg);
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
68 end
8382
e5d00bf4a4d5 util: Various minor changes to please [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8225
diff changeset
69 formatstring = formatstring .. " [%s]"
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
70 end
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
71
8382
e5d00bf4a4d5 util: Various minor changes to please [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8225
diff changeset
72 return formatstring:format(unpack(args));
8225
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
73 end
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
74
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
75 return {
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
76 format = format;
70cb72f46a3b util.format: A string.format wrapper that gracefully handles invalid arguments
Waqas Hussain <waqas20@gmail.com>
parents:
diff changeset
77 };