Trailing-Edge
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PDP-10 Archives
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SRI_NIC_PERM_FS_1_19910112
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kcc-5/lib/math/ceil.c
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/*
* CEIL.C - ceiling function for math library
*
* This code conforms with the description of the ceil function
* as defined in Harbison and Steele's "C: A Reference Manual",
* section 11.3.6
*/
double ceil(x)
double x;
{
extern double modf();
double ipart;
if (modf(x, &ipart) > 0) /* if x has a fractional part, */
ipart++; /* bump up to next highest integer */
return ipart;
}