/**
* Compute character mask "hash", using one bit per letter of the alphabet,
* plus one for any digit.
*/
static guint32
mask_hash(const char *s) {
guchar c;
guint32 mask = 0;
while ((c = (guchar) *s++)) {
if (is_ascii_space(c))
continue;
else if (is_ascii_digit(c))
mask |= MASK_DIGIT;
else {
int idx = ascii_tolower(c) - 97;
if (idx >= 0 && idx < 26)
mask |= MASK_LETTER(idx);
}
}
return mask;
}
/**
* Parse gtk-gnutella's version number in User-Agent/Server string `str'
* and extract relevant information into `ver'.
*
* @param str the version string to be parsed
* @param ver the structure filled with parsed information
* @param end filled with a pointer to the first unparsed character
*
* @returns TRUE if we parsed a gtk-gnutella version correctly, FALSE if we
* were not facing a gtk-gnutella version, or if we did not recognize it.
*/
static bool
version_parse(const char *str, version_t *ver, const char **end)
{
const char *v;
int error;
/*
* Modern version numbers are formatted like this:
*
* gtk-gnutella/0.85 (04/04/2002; X11; FreeBSD 4.6-STABLE i386)
* gtk-gnutella/0.90u (24/06/2002; X11; Linux 2.4.18-pre7 i686)
* gtk-gnutella/0.90b (24/06/2002; X11; Linux 2.4.18-2emi i686)
* gtk-gnutella/0.90b2 (24/06/2002; X11; Linux 2.4.18-2emi i686)
*
* The letter after the version number is either 'u' for unstable, 'a'
* for alpha, 'b' for beta, or nothing for a stable release. It can be
* followed by digits when present.
*
* In prevision for future possible extensions, we also parse
*
* gtk-gnutella/0.90.1b2 (24/06/2002; X11; Linux 2.4.18-2emi i686)
*
* where the third number is the "patchlevel".
*
* Starting 2006-08-26, the user-agent string includes the SVN revision
* at the time of the build. To be compatible with the servents out
* there, the version is included as an optional tag following the date.
*
* gtk-gnutella/0.85 (04/04/2002; r3404; X11; FreeBSD 4.6-STABLE i386)
*
* However, we also start parsing the new format that we shall use when
* all current GTKG out there have expired:
*
* gtk-gnutella/0.85-3404 (04/04/2002; X11; FreeBSD 4.6-STABLE i386)
* gtk-gnutella/0.90b2-3404 (04/04/2002; X11; FreeBSD 4.6-STABLE i386)
*
* where the '-3404' introduces the build number.
*
* Since switching to git (2011-09-11), the SVN build is no longer present
* but rather the output of "git describe" is used to show any difference
* with the latest release tag.
*
* A release would be described as:
*
* gtk-gnutella/0.97.1 (2011-09-11; GTK1; Linux i686)
*
* but any change on top of that would be seen as:
*
* gtk-gnutella/0.97.1-24-g844b7 (2011-09-11; GTK1; Linux i686)
*
* to indicate that 24 commits were made after the release, and the commit
* ID is 844b7... (only enough hexadecimal digits are output to make the
* string unique at the time it was generated.
*
* If furthermore a build is done from a dirty git repository, the string
* "-dirty" is appended after the commit ID:
*
* gtk-gnutella/0.97.1-24-g844b7-dirty (2011-09-11; GTK1; Linux i686)
*/
if (NULL == (v = is_strprefix(str, GTA_PRODUCT_NAME "/")))
return FALSE;
/*
* Parse "major.minor", followed by optional ".patchlevel".
*/
ver->major = parse_uint32(v, &v, 10, &error);
if (error)
return FALSE;
if (*v++ != '.')
return FALSE;
ver->minor = parse_uint32(v, &v, 10, &error);
if (error)
return FALSE;
if ('.' == *v) {
v++;
ver->patchlevel = parse_uint32(v, &v, 10, &error);
if (error)
return FALSE;
} else
ver->patchlevel = 0;
/*
* Parse optional tag letter "x" followed by optional "taglevel".
*/
if (is_ascii_alpha(*v)) {
ver->tag = *v++;
if (is_ascii_digit(*v)) {
ver->taglevel = parse_uint32(v, &v, 10, &error);
if (error)
return FALSE;
} else
ver->taglevel = 0;
} else {
ver->tag = '\0';
ver->taglevel = 0;
}
/*
* Parse optional "-build" (legacy SVN) or "-change-bxxxxxxxx" (git
* version scheme) to be able to sort identical versions with distinct
* changes applied to them.
*/
if ('-' == *v) {
v++;
if (!is_strprefix(v, "dirty")) {
ver->build = parse_uint32(v, &v, 10, &error);
if (error)
return FALSE;
}
} else
ver->build = 0;
if (end != NULL)
*end = v;
if (GNET_PROPERTY(version_debug) > 1)
version_dump(str, ver, "#");
return TRUE;
}