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1 | .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
| 2 | .\" | |
| 3 | .\" Permission is granted to make and distribute verbatim copies of this | |
| 4 | .\" manual provided the copyright notice and this permission notice are | |
| 5 | .\" preserved on all copies. | |
| 6 | .\" | |
| 7 | .\" Permission is granted to copy and distribute modified versions of this | |
| 8 | .\" manual under the conditions for verbatim copying, provided that the | |
| 9 | .\" entire resulting derived work is distributed under the terms of a | |
| 10 | .\" permission notice identical to this one. | |
| 11 | .\" | |
| 12 | .\" Since the Linux kernel and libraries are constantly changing, this | |
| 13 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
| 14 | .\" responsibility for errors or omissions, or for damages resulting from | |
| 15 | .\" the use of the information contained herein. The author(s) may not | |
| 16 | .\" have taken the same level of care in the production of this manual, | |
| 17 | .\" which is licensed free of charge, as they might when working | |
| 18 | .\" professionally. | |
| 19 | .\" | |
| 20 | .\" Formatted or processed versions of this manual, if unaccompanied by | |
| 21 | .\" the source, must acknowledge the copyright and authors of this work. | |
| 22 | .\" | |
| 23 | .\" References consulted: | |
| 24 | .\" Linux libc source code | |
| 25 | .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) | |
| 26 | .\" 386BSD man pages | |
| 27 | .\" | |
| 28 | .\" Modified 1993-03-29, David Metcalfe | |
| 29 | .\" Modified 1993-07-24, Rik Faith (faith@cs.unc.edu) | |
| 30 | .\" Modified 2002-08-10, 2003-11-01 Walter Harms, aeb | |
| 31 | .\" | |
| 32 | .TH DIV 3 2003-11-01 "" "Linux Programmer's Manual" | |
| 33 | .SH NAME | |
| 34 | div, ldiv, lldiv, imaxdiv \- compute quotient and remainder of an integer division | |
| 35 | .SH SYNOPSIS | |
| 36 | .nf | |
| 37 | .B #include <stdlib.h> | |
| 38 | .sp | |
| 39 | .BI "div_t div(int " numerator ", int " denominator ); | |
| 40 | .br | |
| 41 | .BI "ldiv_t ldiv(long " numerator ", long " denominator ); | |
| 42 | .br | |
| 43 | .BI "lldiv_t lldiv(long long " numerator ", long long " denominator ); | |
| 44 | .sp | |
| 45 | .B #include <inttypes.h> | |
| 46 | .sp | |
| 47 | .BI "imaxdiv_t imaxdiv(intmax_t " numerator ", intmax_t " denominator ); | |
| 48 | .fi | |
| 49 | .SH DESCRIPTION | |
| 63aa9df0 | 50 | The \fBdiv\fP() function computes the value \fInumerator\fP/\fIdenominator\fP and |
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51 | returns the quotient and remainder in a structure named \fIdiv_t\fP that contains |
| 52 | two integer members (in unspecified order) named \fIquot\fP and \fIrem\fP. | |
| 53 | The quotient is rounded towards zero. | |
| 54 | The result satisfies \fIquot\fP*\fIdenominator\fP+\fIrem\fP = \fInumerator\fP. | |
| 55 | .LP | |
| 63aa9df0 | 56 | The \fBldiv\fP() and \fBlldiv\fP() and \fBimaxdiv\fP() functions do the same, |
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57 | dividing numbers of the indicated type and returning the result in a structure |
| 58 | of the indicated name, in all cases with fields \fIquot\fP and \fIrem\fP | |
| 59 | of the same type as the function arguments. | |
| 60 | .SH "RETURN VALUE" | |
| 61 | The \fIdiv_t\fP (etc.) structure. | |
| 62 | .SH EXAMPLE | |
| 63 | After | |
| 64 | .nf | |
| 2bc2f479 | 65 | div_t q = div(\-5, 3); |
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66 | .fi |
| 67 | the values \fIq.quot\fP and \fIq.rem\fP are \-1 and \-2, respectively. | |
| 68 | .SH "CONFORMING TO" | |
| b14d4aa5 | 69 | SVID 3, 4.3BSD, ISO 9899. |
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70 | The functions lldiv() and imaxdiv() were added in ISO C99. |
| 71 | .SH "SEE ALSO" | |
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72 | .BR abs (3), |
| 73 | .BR remainder (3) |