El d?a Friday, September 16, 2016 a las 08:57:30AM +0100, Matt Caswell escribi?: > >> int OBJ_obj2txt(char *buf, int buf_len, const ASN1_OBJECT *a, int no_name); > >> > >> OBJ_obj2txt() converts the ASN1_OBJECT a into a textual representation. The > >> representation is written as a null terminated string to buf at most buf_len > >> bytes are written, truncating the result if necessary.* The total amount of > >> space required is returned*. If no_name is 0 then if the object has a long > >> or short name then that will be used, otherwise the numerical form will be > >> used. If no_name is 1 then the numerical form will always be used. > >> > >> Above statement statement saying that *amount of space required is > >> returned*. > > > > I saw this, but 'amount of space required' is IMHO vague, I'd expect > > 'the length of the resulting string is returned' > > That is the heart of the problem. OBJ_obj2txt() does not return what you > might expect. The author of TS_OBJ_print_bio() expected it to return the > length of the resulting string (as you do). However OBJ_obj2txt() might > truncate what it would otherwise produce if the supplied buffer isn't > big enough - but it still returns the length of the untruncated string. > > ... I would even suggest to change the wording in the man page to: "... representation is written as a null terminated string to buf at most buf_len bytes are written, INCLUDING THE NULL BYTE, truncating the result ..." -- Matthias Apitz | /"\ ASCII Ribbon Campaign: E-mail: guru at unixarea.de | \ / - No HTML/RTF in E-mail WWW: http://www.unixarea.de/ | X - No proprietary attachments phone: +49-176-38902045 | / \ - Respect for open standards | en.wikipedia.org/wiki/ASCII_Ribbon_Campaign
