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
19       integers.  Unlike the built-in int type, the type int32  is  guaranteed
20       to  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
26       requires exact 32-bit arithmetic.
27
28
29
30
31
32
33       val zero : int32
34
35       The 32-bit integer 0.
36
37
38
39       val one : int32
40
41       The 32-bit integer 1.
42
43
44
45       val minus_one : int32
46
47       The 32-bit integer -1.
48
49
50
51       val neg : int32 -> int32
52
53       Unary negation.
54
55
56
57       val add : int32 -> int32 -> int32
58
59       Addition.
60
61
62
63       val sub : int32 -> int32 -> int32
64
65       Subtraction.
66
67
68
69       val mul : int32 -> int32 -> int32
70
71       Multiplication.
72
73
74
75       val div : int32 -> int32 -> int32
76
77       Integer  division.   Raise  Division_by_zero  if the second argument is
78       zero.  This division rounds the real quotient of its arguments  towards
79       zero, as specified for Pervasives.(/) .
80
81
82
83       val rem : int32 -> int32 -> int32
84
85       Integer  remainder.  If y is not zero, the result of Int32.rem x y sat‐
86       isfies the following property: x = Int32.add (Int32.mul (Int32.div x y)
87       y)  (Int32.rem x y) .  If y = 0 , Int32.rem x y raises Division_by_zero
88       .
89
90
91
92       val succ : int32 -> int32
93
94       Successor.  Int32.succ x is Int32.add x Int32.one .
95
96
97
98       val pred : int32 -> int32
99
100       Predecessor.  Int32.pred x is Int32.sub x Int32.one .
101
102
103
104       val abs : int32 -> int32
105
106       Return the absolute value of its argument.
107
108
109
110       val max_int : int32
111
112       The greatest representable 32-bit integer, 2^31 - 1.
113
114
115
116       val min_int : int32
117
118       The smallest representable 32-bit integer, -2^31.
119
120
121
122       val logand : int32 -> int32 -> int32
123
124       Bitwise logical and.
125
126
127
128       val logor : int32 -> int32 -> int32
129
130       Bitwise logical or.
131
132
133
134       val logxor : int32 -> int32 -> int32
135
136       Bitwise logical exclusive or.
137
138
139
140       val lognot : int32 -> int32
141
142       Bitwise logical negation.
143
144
145
146       val shift_left : int32 -> int -> int32
147
148
149       Int32.shift_left x y shifts x to the left by y  bits.   The  result  is
150       unspecified if y < 0 or y >= 32 .
151
152
153
154       val shift_right : int32 -> int -> int32
155
156
157       Int32.shift_right  x  y  shifts  x  to the right by y bits.  This is an
158       arithmetic shift: the sign bit of x is replicated and inserted  in  the
159       vacated bits.  The result is unspecified if y < 0 or y >= 32 .
160
161
162
163       val shift_right_logical : int32 -> int -> int32
164
165
166       Int32.shift_right_logical x y shifts x to the right by y bits.  This is
167       a logical shift: zeroes are inserted in the vacated bits regardless  of
168       the sign of x .  The result is unspecified if y < 0 or y >= 32 .
169
170
171
172       val of_int : int -> int32
173
174       Convert  the  given integer (type int ) to a 32-bit integer (type int32
175       ).
176
177
178
179       val to_int : int32 -> int
180
181       Convert the given 32-bit integer (type int32 ) to an integer (type  int
182       ).   On 32-bit platforms, the 32-bit integer is taken modulo 2^31, i.e.
183       the high-order bit is lost during the conversion.  On 64-bit platforms,
184       the conversion is exact.
185
186
187
188       val of_float : float -> int32
189
190       Convert the given floating-point number to a 32-bit integer, discarding
191       the fractional part (truncate towards 0).  The result of the conversion
192       is  undefined  if,  after truncation, the number is outside the range [
193       Int32.min_int , Int32.max_int ].
194
195
196
197       val to_float : int32 -> float
198
199       Convert the given 32-bit integer to a floating-point number.
200
201
202
203       val of_string : string -> int32
204
205       Convert the given string to a 32-bit integer.  The string  is  read  in
206       decimal  (by default, or if the string begins with 0u ) or in hexadeci‐
207       mal, octal or binary if the string begins with 0x , 0o  or  0b  respec‐
208       tively.
209
210       The  0u  prefix reads the input as an unsigned integer in the range [0,
211       2*Int32.max_int+1] .  If the input exceeds  Int32.max_int  it  is  con‐
212       verted  to the signed integer Int32.min_int + input - Int32.max_int - 1
213       .
214
215       The _ (underscore) character can appear anywhere in the string  and  is
216       ignored.   Raise  Failure  Int32.of_string if the given string is not a
217       valid representation of an  integer,  or  if  the  integer  represented
218       exceeds the range of integers representable in type int32 .
219
220
221
222       val of_string_opt : string -> int32 option
223
224       Same as of_string , but return None instead of raising.
225
226
227       Since 4.05
228
229
230
231       val to_string : int32 -> string
232
233       Return the string representation of its argument, in signed decimal.
234
235
236
237       val bits_of_float : float -> int32
238
239       Return  the internal representation of the given float according to the
240       IEEE 754 floating-point 'single format' bit  layout.   Bit  31  of  the
241       result  represents  the  sign of the float; bits 30 to 23 represent the
242       (biased) exponent; bits 22 to 0 represent the mantissa.
243
244
245
246       val float_of_bits : int32 -> float
247
248       Return the floating-point number whose internal representation, accord‐
249       ing  to  the IEEE 754 floating-point 'single format' bit layout, is the
250       given int32 .
251
252
253       type t = int32
254
255
256       An alias for the type of 32-bit integers.
257
258
259
260       val compare : t -> t -> int
261
262       The comparison function for 32-bit integers, with the  same  specifica‐
263       tion  as  Pervasives.compare  .   Along with the type t , this function
264       compare allows the module Int32 to be passed as argument to  the  func‐
265       tors Set.Make and Map.Make .
266
267
268
269       val equal : t -> t -> bool
270
271       The equal function for int32s.
272
273
274       Since 4.03.0
275
276
277
278
279
280OCamldoc                          2018-07-14                          Int32(3)