1Int32(3)                         OCaml library                        Int32(3)
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NAME

6       Int32 - 32-bit integers.
7

Module

9       Module   Int32
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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
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37
38
39       val zero : int32
40
41       The 32-bit integer 0.
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45       val one : int32
46
47       The 32-bit integer 1.
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49
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51       val minus_one : int32
52
53       The 32-bit integer -1.
54
55
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57       val neg : int32 -> int32
58
59       Unary negation.
60
61
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63       val add : int32 -> int32 -> int32
64
65       Addition.
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67
68
69       val sub : int32 -> int32 -> int32
70
71       Subtraction.
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75       val mul : int32 -> int32 -> int32
76
77       Multiplication.
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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.
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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
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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       .
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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
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120       val succ : int32 -> int32
121
122       Successor.  Int32.succ x is Int32.add x Int32.one .
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126       val pred : int32 -> int32
127
128       Predecessor.  Int32.pred x is Int32.sub x Int32.one .
129
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132       val abs : int32 -> int32
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134       Return the absolute value of its argument.
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138       val max_int : int32
139
140       The greatest representable 32-bit integer, 2^31 - 1.
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144       val min_int : int32
145
146       The smallest representable 32-bit integer, -2^31.
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150       val logand : int32 -> int32 -> int32
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152       Bitwise logical and.
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156       val logor : int32 -> int32 -> int32
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158       Bitwise logical or.
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162       val logxor : int32 -> int32 -> int32
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164       Bitwise logical exclusive or.
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168       val lognot : int32 -> int32
169
170       Bitwise logical negation.
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172
173
174       val shift_left : int32 -> int -> int32
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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 .
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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
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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
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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
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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).  If the truncated float‐
231       ing-point number is outside the range [ Int32.min_int  ,  Int32.max_int
232       ], no exception is raised, and an unspecified, platform-dependent inte‐
233       ger is returned.
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235
236
237       val to_float : int32 -> float
238
239       Convert the given 32-bit integer to a floating-point number.
240
241
242
243       val of_string : string -> int32
244
245       Convert the given string to a 32-bit integer.  The string  is  read  in
246       decimal  (by default, or if the string begins with 0u ) or in hexadeci‐
247       mal, octal or binary if the string begins with 0x , 0o  or  0b  respec‐
248       tively.
249
250       The  0u  prefix reads the input as an unsigned integer in the range [0,
251       2*Int32.max_int+1] .  If the input exceeds  Int32.max_int  it  is  con‐
252       verted  to the signed integer Int32.min_int + input - Int32.max_int - 1
253       .
254
255       The _ (underscore) character can appear anywhere in the string  and  is
256       ignored.
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258
259       Raises  Failure if the given string is not a valid representation of an
260       integer, or if the integer represented exceeds the  range  of  integers
261       representable in type int32 .
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265       val of_string_opt : string -> int32 option
266
267       Same as of_string , but return None instead of raising.
268
269
270       Since 4.05
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274       val to_string : int32 -> string
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276       Return the string representation of its argument, in signed decimal.
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280       val bits_of_float : float -> int32
281
282       Return  the internal representation of the given float according to the
283       IEEE 754 floating-point 'single format' bit layout.  Bit 31 of the  re‐
284       sult represents the sign of the float; bits 30 to 23 represent the (bi‐
285       ased) exponent; bits 22 to 0 represent the mantissa.
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289       val float_of_bits : int32 -> float
290
291       Return the floating-point number whose internal representation, accord‐
292       ing  to  the IEEE 754 floating-point 'single format' bit layout, is the
293       given int32 .
294
295
296       type t = int32
297
298
299       An alias for the type of 32-bit integers.
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302
303       val compare : t -> t -> int
304
305       The comparison function for 32-bit integers, with the  same  specifica‐
306       tion as compare .  Along with the type t , this function compare allows
307       the module Int32 to be passed as argument to the functors Set.Make  and
308       Map.Make .
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312       val unsigned_compare : t -> t -> int
313
314       Same  as  Int32.compare  , except that arguments are interpreted as un‐
315       signed 32-bit integers.
316
317
318       Since 4.08.0
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322       val equal : t -> t -> bool
323
324       The equal function for int32s.
325
326
327       Since 4.03.0
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331       val min : t -> t -> t
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333       Return the smaller of the two arguments.
334
335
336       Since 4.13.0
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340       val max : t -> t -> t
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342       Return the greater of the two arguments.
343
344
345       Since 4.13.0
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351OCamldoc                          2023-01-23                          Int32(3)