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1-- $Id: strings.lua,v 1.87 2016/12/21 19:23:02 roberto Exp $
2-- See Copyright Notice in file all.lua
3
4print('testing strings and string library')
5
6local maxi, mini = math.maxinteger, math.mininteger
7
8
9local function checkerror (msg, f, ...)
10 local s, err = pcall(f, ...)
11 assert(not s and string.find(err, msg))
12end
13
14
15-- testing string comparisons
16assert('alo' < 'alo1')
17assert('' < 'a')
18assert('alo\0alo' < 'alo\0b')
19assert('alo\0alo\0\0' > 'alo\0alo\0')
20assert('alo' < 'alo\0')
21assert('alo\0' > 'alo')
22assert('\0' < '\1')
23assert('\0\0' < '\0\1')
24assert('\1\0a\0a' <= '\1\0a\0a')
25assert(not ('\1\0a\0b' <= '\1\0a\0a'))
26assert('\0\0\0' < '\0\0\0\0')
27assert(not('\0\0\0\0' < '\0\0\0'))
28assert('\0\0\0' <= '\0\0\0\0')
29assert(not('\0\0\0\0' <= '\0\0\0'))
30assert('\0\0\0' <= '\0\0\0')
31assert('\0\0\0' >= '\0\0\0')
32assert(not ('\0\0b' < '\0\0a\0'))
33
34-- testing string.sub
35assert(string.sub("123456789",2,4) == "234")
36assert(string.sub("123456789",7) == "789")
37assert(string.sub("123456789",7,6) == "")
38assert(string.sub("123456789",7,7) == "7")
39assert(string.sub("123456789",0,0) == "")
40assert(string.sub("123456789",-10,10) == "123456789")
41assert(string.sub("123456789",1,9) == "123456789")
42assert(string.sub("123456789",-10,-20) == "")
43assert(string.sub("123456789",-1) == "9")
44assert(string.sub("123456789",-4) == "6789")
45assert(string.sub("123456789",-6, -4) == "456")
46assert(string.sub("123456789", mini, -4) == "123456")
47assert(string.sub("123456789", mini, maxi) == "123456789")
48assert(string.sub("123456789", mini, mini) == "")
49assert(string.sub("\000123456789",3,5) == "234")
50assert(("\000123456789"):sub(8) == "789")
51
52-- testing string.find
53assert(string.find("123456789", "345") == 3)
54a,b = string.find("123456789", "345")
55assert(string.sub("123456789", a, b) == "345")
56assert(string.find("1234567890123456789", "345", 3) == 3)
57assert(string.find("1234567890123456789", "345", 4) == 13)
58assert(string.find("1234567890123456789", "346", 4) == nil)
59assert(string.find("1234567890123456789", ".45", -9) == 13)
60assert(string.find("abcdefg", "\0", 5, 1) == nil)
61assert(string.find("", "") == 1)
62assert(string.find("", "", 1) == 1)
63assert(not string.find("", "", 2))
64assert(string.find('', 'aaa', 1) == nil)
65assert(('alo(.)alo'):find('(.)', 1, 1) == 4)
66
67assert(string.len("") == 0)
68assert(string.len("\0\0\0") == 3)
69assert(string.len("1234567890") == 10)
70
71assert(#"" == 0)
72assert(#"\0\0\0" == 3)
73assert(#"1234567890" == 10)
74
75-- testing string.byte/string.char
76assert(string.byte("a") == 97)
77assert(string.byte("\xe4") > 127)
78assert(string.byte(string.char(255)) == 255)
79assert(string.byte(string.char(0)) == 0)
80assert(string.byte("\0") == 0)
81assert(string.byte("\0\0alo\0x", -1) == string.byte('x'))
82assert(string.byte("ba", 2) == 97)
83assert(string.byte("\n\n", 2, -1) == 10)
84assert(string.byte("\n\n", 2, 2) == 10)
85assert(string.byte("") == nil)
86assert(string.byte("hi", -3) == nil)
87assert(string.byte("hi", 3) == nil)
88assert(string.byte("hi", 9, 10) == nil)
89assert(string.byte("hi", 2, 1) == nil)
90assert(string.char() == "")
91assert(string.char(0, 255, 0) == "\0\255\0")
92assert(string.char(0, string.byte("\xe4"), 0) == "\0\xe4\0")
93assert(string.char(string.byte("\xe4l\0óu", 1, -1)) == "\xe4l\0óu")
94assert(string.char(string.byte("\xe4l\0óu", 1, 0)) == "")
95assert(string.char(string.byte("\xe4l\0óu", -10, 100)) == "\xe4l\0óu")
96
97assert(string.upper("ab\0c") == "AB\0C")
98assert(string.lower("\0ABCc%$") == "\0abcc%$")
99assert(string.rep('teste', 0) == '')
100assert(string.rep('tés\00tê', 2) == 'tés\0têtés\000tê')
101assert(string.rep('', 10) == '')
102
103if string.packsize("i") == 4 then
104 -- result length would be 2^31 (int overflow)
105 checkerror("too large", string.rep, 'aa', (1 << 30))
106 checkerror("too large", string.rep, 'a', (1 << 30), ',')
107end
108
109-- repetitions with separator
110assert(string.rep('teste', 0, 'xuxu') == '')
111assert(string.rep('teste', 1, 'xuxu') == 'teste')
112assert(string.rep('\1\0\1', 2, '\0\0') == '\1\0\1\0\0\1\0\1')
113assert(string.rep('', 10, '.') == string.rep('.', 9))
114assert(not pcall(string.rep, "aa", maxi // 2 + 10))
115assert(not pcall(string.rep, "", maxi // 2 + 10, "aa"))
116
117assert(string.reverse"" == "")
118assert(string.reverse"\0\1\2\3" == "\3\2\1\0")
119assert(string.reverse"\0001234" == "4321\0")
120
121for i=0,30 do assert(string.len(string.rep('a', i)) == i) end
122
123assert(type(tostring(nil)) == 'string')
124assert(type(tostring(12)) == 'string')
125assert(string.find(tostring{}, 'table:'))
126assert(string.find(tostring(print), 'function:'))
127assert(#tostring('\0') == 1)
128assert(tostring(true) == "true")
129assert(tostring(false) == "false")
130assert(tostring(-1203) == "-1203")
131assert(tostring(1203.125) == "1203.125")
132assert(tostring(-0.5) == "-0.5")
133assert(tostring(-32767) == "-32767")
134if math.tointeger(2147483647) then -- no overflow? (32 bits)
135 assert(tostring(-2147483647) == "-2147483647")
136end
137if math.tointeger(4611686018427387904) then -- no overflow? (64 bits)
138 assert(tostring(4611686018427387904) == "4611686018427387904")
139 assert(tostring(-4611686018427387904) == "-4611686018427387904")
140end
141
142if tostring(0.0) == "0.0" then -- "standard" coercion float->string
143 assert('' .. 12 == '12' and 12.0 .. '' == '12.0')
144 assert(tostring(-1203 + 0.0) == "-1203.0")
145else -- compatible coercion
146 assert(tostring(0.0) == "0")
147 assert('' .. 12 == '12' and 12.0 .. '' == '12')
148 assert(tostring(-1203 + 0.0) == "-1203")
149end
150
151
152x = '"ílo"\n\\'
153assert(string.format('%q%s', x, x) == '"\\"ílo\\"\\\n\\\\""ílo"\n\\')
154assert(string.format('%q', "\0") == [["\0"]])
155assert(load(string.format('return %q', x))() == x)
156x = "\0\1\0023\5\0009"
157assert(load(string.format('return %q', x))() == x)
158assert(string.format("\0%c\0%c%x\0", string.byte("\xe4"), string.byte("b"), 140) ==
159 "\0\xe4\0b8c\0")
160assert(string.format('') == "")
161assert(string.format("%c",34)..string.format("%c",48)..string.format("%c",90)..string.format("%c",100) ==
162 string.format("%c%c%c%c", 34, 48, 90, 100))
163assert(string.format("%s\0 is not \0%s", 'not be', 'be') == 'not be\0 is not \0be')
164assert(string.format("%%%d %010d", 10, 23) == "%10 0000000023")
165assert(tonumber(string.format("%f", 10.3)) == 10.3)
166x = string.format('"%-50s"', 'a')
167assert(#x == 52)
168assert(string.sub(x, 1, 4) == '"a ')
169
170assert(string.format("-%.20s.20s", string.rep("%", 2000)) ==
171 "-"..string.rep("%", 20)..".20s")
172assert(string.format('"-%20s.20s"', string.rep("%", 2000)) ==
173 string.format("%q", "-"..string.rep("%", 2000)..".20s"))
174
175do
176 local function checkQ (v)
177 local s = string.format("%q", v)
178 local nv = load("return " .. s)()
179 assert(v == nv and math.type(v) == math.type(nv))
180 end
181 checkQ("\0\0\1\255\u{234}")
182 checkQ(math.maxinteger)
183 checkQ(math.mininteger)
184 checkQ(math.pi)
185 checkQ(0.1)
186 checkQ(true)
187 checkQ(nil)
188 checkQ(false)
189 checkerror("no literal", string.format, "%q", {})
190end
191
192assert(string.format("\0%s\0", "\0\0\1") == "\0\0\0\1\0")
193checkerror("contains zeros", string.format, "%10s", "\0")
194
195-- format x tostring
196assert(string.format("%s %s", nil, true) == "nil true")
197assert(string.format("%s %.4s", false, true) == "false true")
198assert(string.format("%.3s %.3s", false, true) == "fal tru")
199local m = setmetatable({}, {__tostring = function () return "hello" end,
200 __name = "hi"})
201assert(string.format("%s %.10s", m, m) == "hello hello")
202getmetatable(m).__tostring = nil -- will use '__name' from now on
203assert(string.format("%.4s", m) == "hi: ")
204
205getmetatable(m).__tostring = function () return {} end
206checkerror("'__tostring' must return a string", tostring, m)
207
208
209assert(string.format("%x", 0.0) == "0")
210assert(string.format("%02x", 0.0) == "00")
211assert(string.format("%08X", 0xFFFFFFFF) == "FFFFFFFF")
212assert(string.format("%+08d", 31501) == "+0031501")
213assert(string.format("%+08d", -30927) == "-0030927")
214
215
216do -- longest number that can be formatted
217 local i = 1
218 local j = 10000
219 while i + 1 < j do -- binary search for maximum finite float
220 local m = (i + j) // 2
221 if 10^m < math.huge then i = m else j = m end
222 end
223 assert(10^i < math.huge and 10^j == math.huge)
224 local s = string.format('%.99f', -(10^i))
225 assert(string.len(s) >= i + 101)
226 assert(tonumber(s) == -(10^i))
227end
228
229
230-- testing large numbers for format
231do -- assume at least 32 bits
232 local max, min = 0x7fffffff, -0x80000000 -- "large" for 32 bits
233 assert(string.sub(string.format("%8x", -1), -8) == "ffffffff")
234 assert(string.format("%x", max) == "7fffffff")
235 assert(string.sub(string.format("%x", min), -8) == "80000000")
236 assert(string.format("%d", max) == "2147483647")
237 assert(string.format("%d", min) == "-2147483648")
238 assert(string.format("%u", 0xffffffff) == "4294967295")
239 assert(string.format("%o", 0xABCD) == "125715")
240
241 max, min = 0x7fffffffffffffff, -0x8000000000000000
242 if max > 2.0^53 then -- only for 64 bits
243 assert(string.format("%x", (2^52 | 0) - 1) == "fffffffffffff")
244 assert(string.format("0x%8X", 0x8f000003) == "0x8F000003")
245 assert(string.format("%d", 2^53) == "9007199254740992")
246 assert(string.format("%i", -2^53) == "-9007199254740992")
247 assert(string.format("%x", max) == "7fffffffffffffff")
248 assert(string.format("%x", min) == "8000000000000000")
249 assert(string.format("%d", max) == "9223372036854775807")
250 assert(string.format("%d", min) == "-9223372036854775808")
251 assert(string.format("%u", ~(-1 << 64)) == "18446744073709551615")
252 assert(tostring(1234567890123) == '1234567890123')
253 end
254end
255
256
257do print("testing 'format %a %A'")
258 local function matchhexa (n)
259 local s = string.format("%a", n)
260 -- result matches ISO C requirements
261 assert(string.find(s, "^%-?0x[1-9a-f]%.?[0-9a-f]*p[-+]?%d+$"))
262 assert(tonumber(s) == n) -- and has full precision
263 s = string.format("%A", n)
264 assert(string.find(s, "^%-?0X[1-9A-F]%.?[0-9A-F]*P[-+]?%d+$"))
265 assert(tonumber(s) == n)
266 end
267 for _, n in ipairs{0.1, -0.1, 1/3, -1/3, 1e30, -1e30,
268 -45/247, 1, -1, 2, -2, 3e-20, -3e-20} do
269 matchhexa(n)
270 end
271
272 assert(string.find(string.format("%A", 0.0), "^0X0%.?0?P%+?0$"))
273 assert(string.find(string.format("%a", -0.0), "^%-0x0%.?0?p%+?0$"))
274
275 if not _port then -- test inf, -inf, NaN, and -0.0
276 assert(string.find(string.format("%a", 1/0), "^inf"))
277 assert(string.find(string.format("%A", -1/0), "^%-INF"))
278 assert(string.find(string.format("%a", 0/0), "^%-?nan"))
279 assert(string.find(string.format("%a", -0.0), "^%-0x0"))
280 end
281
282 if not pcall(string.format, "%.3a", 0) then
283 (Message or print)("\n >>> modifiers for format '%a' not available <<<\n")
284 else
285 assert(string.find(string.format("%+.2A", 12), "^%+0X%x%.%x0P%+?%d$"))
286 assert(string.find(string.format("%.4A", -12), "^%-0X%x%.%x000P%+?%d$"))
287 end
288end
289
290
291-- errors in format
292
293local function check (fmt, msg)
294 checkerror(msg, string.format, fmt, 10)
295end
296
297local aux = string.rep('0', 600)
298check("%100.3d", "too long")
299check("%1"..aux..".3d", "too long")
300check("%1.100d", "too long")
301check("%10.1"..aux.."004d", "too long")
302check("%t", "invalid option")
303check("%"..aux.."d", "repeated flags")
304check("%d %d", "no value")
305
306
307assert(load("return 1\n--comment without ending EOL")() == 1)
308
309
310checkerror("table expected", table.concat, 3)
311assert(table.concat{} == "")
312assert(table.concat({}, 'x') == "")
313assert(table.concat({'\0', '\0\1', '\0\1\2'}, '.\0.') == "\0.\0.\0\1.\0.\0\1\2")
314local a = {}; for i=1,300 do a[i] = "xuxu" end
315assert(table.concat(a, "123").."123" == string.rep("xuxu123", 300))
316assert(table.concat(a, "b", 20, 20) == "xuxu")
317assert(table.concat(a, "", 20, 21) == "xuxuxuxu")
318assert(table.concat(a, "x", 22, 21) == "")
319assert(table.concat(a, "3", 299) == "xuxu3xuxu")
320assert(table.concat({}, "x", maxi, maxi - 1) == "")
321assert(table.concat({}, "x", mini + 1, mini) == "")
322assert(table.concat({}, "x", maxi, mini) == "")
323assert(table.concat({[maxi] = "alo"}, "x", maxi, maxi) == "alo")
324assert(table.concat({[maxi] = "alo", [maxi - 1] = "y"}, "-", maxi - 1, maxi)
325 == "y-alo")
326
327assert(not pcall(table.concat, {"a", "b", {}}))
328
329a = {"a","b","c"}
330assert(table.concat(a, ",", 1, 0) == "")
331assert(table.concat(a, ",", 1, 1) == "a")
332assert(table.concat(a, ",", 1, 2) == "a,b")
333assert(table.concat(a, ",", 2) == "b,c")
334assert(table.concat(a, ",", 3) == "c")
335assert(table.concat(a, ",", 4) == "")
336
337if not _port then
338
339 local locales = { "ptb", "pt_BR.iso88591", "ISO-8859-1" }
340 local function trylocale (w)
341 for i = 1, #locales do
342 if os.setlocale(locales[i], w) then
343 print(string.format("'%s' locale set to '%s'", w, locales[i]))
344 return locales[i]
345 end
346 end
347 print(string.format("'%s' locale not found", w))
348 return false
349 end
350
351 if trylocale("collate") then
352 assert("alo" < "álo" and "álo" < "amo")
353 end
354
355 if trylocale("ctype") then
356 assert(string.gsub("áéíóú", "%a", "x") == "xxxxx")
357 assert(string.gsub("áÁéÉ", "%l", "x") == "xÁxÉ")
358 assert(string.gsub("áÁéÉ", "%u", "x") == "áxéx")
359 assert(string.upper"áÁé{xuxu}ção" == "ÁÁÉ{XUXU}ÇÃO")
360 end
361
362 os.setlocale("C")
363 assert(os.setlocale() == 'C')
364 assert(os.setlocale(nil, "numeric") == 'C')
365
366end
367
368
369-- bug in Lua 5.3.2
370-- 'gmatch' iterator does not work across coroutines
371do
372 local f = string.gmatch("1 2 3 4 5", "%d+")
373 assert(f() == "1")
374 co = coroutine.wrap(f)
375 assert(co() == "2")
376end
377
378print('OK')
379