[neomutt-devel] strfcpy() improvement

Darshit Shah darnir at gmail.com
Wed Oct 5 12:58:02 CEST 2016

* Richard Russon <rich at flatcap.org> [161005 01:28]:
>> In fact, I would suggest turning it into a function
>I didn't actually consider that.
>I was just happy to eliminate 100 false positives from coverity :-)
>> Most modern compilers are smart enough to inline such a trivial function.
>True.  Not that anything in NeoMutt is *that* time-sensitive.
>> The more macros we get rid of, the cleaner and safer the code is.
>Agreed.  Plus the function could be quite simple.
>The original macro ran strndup which returns a pointer to 'dest'.
>There are 439 uses of strfcpy and none of them use the return value.
>However, a quick bit of research shows that using a function this way
>isn't considered wise, because the caller can't tell if the string has
>been truncated.
However, when the caller passes a LEN parameter, it expects the string 
to be truncated.

char *strfcpy(char *dest, const char *src, size_t n) {
  char *dest0 = dest;
  while (--len > 0 && *src != '\0') {
	*dest++ = *src++;
  *dest = '\0'
  return dest0;

This is a simple implementation of how a strfcpy function would be 

>I'm open to suggestions (and code)

Thanking You,
Darshit Shah
PGP Fingerprint: 7845 120B 07CB D8D6 ECE5 FF2B 2A17 43ED A91A 35B6
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