BaseString&
BaseString::appfmt(const char *fmt, ...)
{
char buf[1];
va_list ap;
int l;
/* Figure out how long the formatted string will be. A small temporary
* buffer is used, because I don't trust all implementations to work
* when called as vsnprintf(NULL, 0, ...).
*/
va_start(ap, fmt);
l = basestring_vsnprintf(buf, sizeof(buf), fmt, ap) + 1;
va_end(ap);
char *tmp = new char[l];
if (tmp == NULL)
{
errno = ENOMEM;
return *this;
}
va_start(ap, fmt);
basestring_vsnprintf(tmp, l, fmt, ap);
va_end(ap);
append(tmp);
delete[] tmp;
return *this;
}
BaseString&
BaseString::assfmt(const char *fmt, ...)
{
char buf[1];
va_list ap;
int l;
/* Figure out how long the formatted string will be. A small temporary
* buffer is used, because I don't trust all implementations to work
* when called as vsnprintf(NULL, 0, ...).
*/
va_start(ap, fmt);
l = basestring_vsnprintf(buf, sizeof(buf), fmt, ap) + 1;
va_end(ap);
if(l > (int)m_len) {
char *t = new char[l];
if (t == NULL)
{
errno = ENOMEM;
return *this;
}
delete[] m_chr;
m_chr = t;
}
va_start(ap, fmt);
basestring_vsnprintf(m_chr, l, fmt, ap);
va_end(ap);
m_len = strlen(m_chr);
return *this;
}
int
BaseString::snprintf(char *str, size_t size, const char *format, ...)
{
va_list ap;
va_start(ap, format);
int ret= basestring_vsnprintf(str, size, format, ap);
va_end(ap);
return(ret);
}
int
basestring_vsnprintf(char *str, size_t size, const char *format, va_list ap)
{
int ret;
if (size == 0)
{
char buf[1];
return basestring_vsnprintf(buf, 1, format, ap);
}
ret = IF_WIN(_vsnprintf,vsnprintf)(str, size, format, ap);
if (ret >= 0 && ret < (int)size)
return ret;
#ifdef _WIN32
if (ret < 0 && errno == EINVAL)
return ret;
// otherwise, more than size chars are needed
return _vscprintf(format, ap);
#else
return ret;
#endif
}
int
BaseString::vsnprintf(char *str, size_t size, const char *format, va_list ap)
{
return(basestring_vsnprintf(str, size, format, ap));
}
