SEI CERT C Coding Standard

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Old Version 15

changes.mady.by.user Justin Pincar

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New Version 16

changes.mady.by.user Justin Pincar

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Code Block
bgColor#FFCCCC
long double ld;
double d1;
double d2;
float f1;
float f2;

.../* initializations */

f1 = (float)d1;
f2 = (float)ld;
d2 = (double)ld;

...

This compliant code properly checks to see whether the values to be stored are too large to can be represented properly in the new type.

Code Block
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#include <float.h>

...

long double ld;
double d1;
double d2;
float f1;
float f2;

.../* initializations */

if(d1 > FLT_MAX || d1 < -FLT_MAXMIN) {
	/* Handle error condition */
} else {
	f1 = (float)d1;
}
if(ld > FLT_MAX || ld < -FLT_MAXMIN) {
	/* Handle error condition */
} else {
	f2 = (float)ld;
}
if(ld > DBL_MAX || ld < -DBL_MAXMIN) {
	/* Handle error condition */
} else {
	d2 = (double)ld;
}

...