1Int32(3)                         OCaml library                        Int32(3)
2
3
4

NAME

6       Int32 - 32-bit integers.
7

Module

9       Module   Int32
10

Documentation

12       Module Int32
13        : sig end
14
15
16       32-bit integers.
17
18       This  module provides operations on the type int32 of signed 32-bit in‐
19       tegers.  Unlike the built-in int type, the type int32 is guaranteed  to
20       be  exactly  32-bit  wide  on all platforms.  All arithmetic operations
21       over int32 are taken modulo 2^32.
22
23       Performance notice: values of type int32 occupy more memory space  than
24       values  of  type int , and arithmetic operations on int32 are generally
25       slower than those on int .  Use int32 only  when  the  application  re‐
26       quires exact 32-bit arithmetic.
27
28       Literals for 32-bit integers are suffixed by l:
29             let zero: int32 = 0l
30             let one: int32 = 1l
31             let m_one: int32 = -1l
32
33
34
35
36
37
38
39       val zero : int32
40
41       The 32-bit integer 0.
42
43
44
45       val one : int32
46
47       The 32-bit integer 1.
48
49
50
51       val minus_one : int32
52
53       The 32-bit integer -1.
54
55
56
57       val neg : int32 -> int32
58
59       Unary negation.
60
61
62
63       val add : int32 -> int32 -> int32
64
65       Addition.
66
67
68
69       val sub : int32 -> int32 -> int32
70
71       Subtraction.
72
73
74
75       val mul : int32 -> int32 -> int32
76
77       Multiplication.
78
79
80
81       val div : int32 -> int32 -> int32
82
83       Integer  division.  This division rounds the real quotient of its argu‐
84       ments towards zero, as specified for (/) .
85
86
87       Raises Division_by_zero if the second argument is zero.
88
89
90
91       val unsigned_div : int32 -> int32 -> int32
92
93       Same as Int32.div , except that arguments and result are interpreted as
94       unsigned 32-bit integers.
95
96
97       Since 4.08.0
98
99
100
101       val rem : int32 -> int32 -> int32
102
103       Integer  remainder.  If y is not zero, the result of Int32.rem x y sat‐
104       isfies the following property: x = Int32.add (Int32.mul (Int32.div x y)
105       y)  (Int32.rem x y) .  If y = 0 , Int32.rem x y raises Division_by_zero
106       .
107
108
109
110       val unsigned_rem : int32 -> int32 -> int32
111
112       Same as Int32.rem , except that arguments and result are interpreted as
113       unsigned 32-bit integers.
114
115
116       Since 4.08.0
117
118
119
120       val succ : int32 -> int32
121
122       Successor.  Int32.succ x is Int32.add x Int32.one .
123
124
125
126       val pred : int32 -> int32
127
128       Predecessor.  Int32.pred x is Int32.sub x Int32.one .
129
130
131
132       val abs : int32 -> int32
133
134       Return the absolute value of its argument.
135
136
137
138       val max_int : int32
139
140       The greatest representable 32-bit integer, 2^31 - 1.
141
142
143
144       val min_int : int32
145
146       The smallest representable 32-bit integer, -2^31.
147
148
149
150       val logand : int32 -> int32 -> int32
151
152       Bitwise logical and.
153
154
155
156       val logor : int32 -> int32 -> int32
157
158       Bitwise logical or.
159
160
161
162       val logxor : int32 -> int32 -> int32
163
164       Bitwise logical exclusive or.
165
166
167
168       val lognot : int32 -> int32
169
170       Bitwise logical negation.
171
172
173
174       val shift_left : int32 -> int -> int32
175
176
177       Int32.shift_left x y shifts x to the left by y bits.  The result is un‐
178       specified if y < 0 or y >= 32 .
179
180
181
182       val shift_right : int32 -> int -> int32
183
184
185       Int32.shift_right x y shifts x to the right by  y  bits.   This  is  an
186       arithmetic  shift:  the sign bit of x is replicated and inserted in the
187       vacated bits.  The result is unspecified if y < 0 or y >= 32 .
188
189
190
191       val shift_right_logical : int32 -> int -> int32
192
193
194       Int32.shift_right_logical x y shifts x to the right by y bits.  This is
195       a  logical shift: zeroes are inserted in the vacated bits regardless of
196       the sign of x .  The result is unspecified if y < 0 or y >= 32 .
197
198
199
200       val of_int : int -> int32
201
202       Convert the given integer (type int ) to a 32-bit integer  (type  int32
203       ). On 64-bit platforms, the argument is taken modulo 2^32.
204
205
206
207       val to_int : int32 -> int
208
209       Convert  the given 32-bit integer (type int32 ) to an integer (type int
210       ).  On 32-bit platforms, the 32-bit integer is taken modulo 2^31,  i.e.
211       the high-order bit is lost during the conversion.  On 64-bit platforms,
212       the conversion is exact.
213
214
215
216       val unsigned_to_int : int32 -> int option
217
218       Same as Int32.to_int , but interprets the argument as an unsigned inte‐
219       ger.   Returns  None  if  the unsigned value of the argument cannot fit
220       into an int .
221
222
223       Since 4.08.0
224
225
226
227       val of_float : float -> int32
228
229       Convert the given floating-point number to a 32-bit integer, discarding
230       the fractional part (truncate towards 0).  The result of the conversion
231       is undefined if, after truncation, the number is outside  the  range  [
232       Int32.min_int , Int32.max_int ].
233
234
235
236       val to_float : int32 -> float
237
238       Convert the given 32-bit integer to a floating-point number.
239
240
241
242       val of_string : string -> int32
243
244       Convert  the  given  string to a 32-bit integer.  The string is read in
245       decimal (by default, or if the string begins with 0u ) or in  hexadeci‐
246       mal,  octal  or  binary if the string begins with 0x , 0o or 0b respec‐
247       tively.
248
249       The 0u prefix reads the input as an unsigned integer in the  range  [0,
250       2*Int32.max_int+1]  .   If  the  input exceeds Int32.max_int it is con‐
251       verted to the signed integer Int32.min_int + input - Int32.max_int -  1
252       .
253
254       The  _  (underscore) character can appear anywhere in the string and is
255       ignored.
256
257
258       Raises Failure if the given string is not a valid representation of  an
259       integer,  or  if  the integer represented exceeds the range of integers
260       representable in type int32 .
261
262
263
264       val of_string_opt : string -> int32 option
265
266       Same as of_string , but return None instead of raising.
267
268
269       Since 4.05
270
271
272
273       val to_string : int32 -> string
274
275       Return the string representation of its argument, in signed decimal.
276
277
278
279       val bits_of_float : float -> int32
280
281       Return the internal representation of the given float according to  the
282       IEEE  754 floating-point 'single format' bit layout.  Bit 31 of the re‐
283       sult represents the sign of the float; bits 30 to 23 represent the (bi‐
284       ased) exponent; bits 22 to 0 represent the mantissa.
285
286
287
288       val float_of_bits : int32 -> float
289
290       Return the floating-point number whose internal representation, accord‐
291       ing to the IEEE 754 floating-point 'single format' bit layout,  is  the
292       given int32 .
293
294
295       type t = int32
296
297
298       An alias for the type of 32-bit integers.
299
300
301
302       val compare : t -> t -> int
303
304       The  comparison  function for 32-bit integers, with the same specifica‐
305       tion as compare .  Along with the type t , this function compare allows
306       the  module Int32 to be passed as argument to the functors Set.Make and
307       Map.Make .
308
309
310
311       val unsigned_compare : t -> t -> int
312
313       Same as Int32.compare , except that arguments are  interpreted  as  un‐
314       signed 32-bit integers.
315
316
317       Since 4.08.0
318
319
320
321       val equal : t -> t -> bool
322
323       The equal function for int32s.
324
325
326       Since 4.03.0
327
328
329
330       val min : t -> t -> t
331
332       Return the smaller of the two arguments.
333
334
335       Since 4.13.0
336
337
338
339       val max : t -> t -> t
340
341       Return the greater of the two arguments.
342
343
344       Since 4.13.0
345
346
347
348
349
350OCamldoc                          2022-02-04                          Int32(3)