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| Code Block | ||
|---|---|---|
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size_t count_preceding_whitespace(const char *s) {
const char *t = s;
size_t length = strlen(s) + 1;
/* possibly *t < 0 */
while (isspace(*t) && (t - s < length)) {
++t;
}
return t - s;
}
|
The argument to isspace() must be EOF or representable as an unsigned char; otherwise, the result is undefined.
Compliant Solution
This compliant solution casts the character to unsigned char before passing it as an argument to the isspace() function.
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