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# compare alpha and numeric segments of two versions
# return 1: first is newer than second
# 0: first and second are the same version
# -1: second is newer than first
def rpmVersionCompare(e1, v1, r1, e2, v2, r2):
if e1 and not e2:
return 1
if not e1 and e2:
return -1
if e1 and e2:
if e1 < e2:
return -1
if e1 > e2:
return 1
rc = rpmvercmp(v1, v2)
if rc: return rc
return rpmvercmp(r1, r2)
# compare alpha and numeric segments of two versions
# return 1: a is newer than b
# 0: a and b are the same version
# -1: b is newer than a
def rpmvercmp(a, b):
if a == b:
return 0
ai = 0
bi = 0
la = len(a)
lb = len(b)
while ai < la and bi < lb:
while ai < la and not a[ai].isalnum(): ai += 1
while bi < lb and not b[bi].isalnum(): bi += 1
aj = ai
bj = bi
if a[aj].isdigit():
while aj < la and a[aj].isdigit(): aj += 1
while bj < lb and b[bj].isdigit(): bj += 1
isnum = 1
else:
while aj < la and a[aj].isalpha(): aj += 1
while bj < lb and b[bj].isalpha(): bj += 1
isnum = 0
if aj == ai or bj == bi:
return -1
if isnum:
while ai < la and a[ai] == '0': ai += 1
while bi < lb and b[bi] == '0': bi += 1
if aj-ai > bj-bi: return 1
if bj-bi > aj-ai: return -1
rc = cmp(a[ai:aj], b[bi:bj])
if rc:
return rc
ai = aj
bi = bj
if ai == la and bi == lb:
return 0
if ai == la:
return -1
else:
return 1
# vim:ts=4:sw=4
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