// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: debversion.cc,v 1.2 2001/02/20 07:03:17 jgg Exp $
+// $Id: debversion.cc,v 1.8 2003/09/10 23:39:49 mdz Exp $
/* ######################################################################
Debian Version - Versioning system for Debian
/*}}}*/
// Include Files /*{{{*/
#define APT_COMPATIBILITY 986
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/debversion.h"
-#endif
#include <apt-pkg/debversion.h>
#include <apt-pkg/pkgcache.h>
#include <stdlib.h>
+#include <ctype.h>
/*}}}*/
debVersioningSystem debVS;
Label = "Standard .deb";
}
/*}}}*/
-// StrToLong - Convert the string between two iterators to a long /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-static unsigned long StrToLong(const char *begin,const char *end)
-{
- char S[40];
- char *I = S;
- for (; begin != end && I < S + 40;)
- *I++ = *begin++;
- *I = 0;
- return strtoul(S,0,10);
-}
- /*}}}*/
+
// debVS::CmpFragment - Compare versions /*{{{*/
// ---------------------------------------------------------------------
-/* This compares a fragment of the version. Dpkg has a really short
- version of this, but it is uh.. interesting to grok. */
-int debVersioningSystem::CmpFragment(const char *A,const char *AEnd,
+/* This compares a fragment of the version. This is a slightly adapted
+ version of what dpkg uses. */
+#define order(x) ((x) == '~' ? -1 \
+ : isdigit((x)) ? 0 \
+ : !(x) ? 0 \
+ : isalpha((x)) ? (x) \
+ : (x) + 256)
+int debVersioningSystem::CmpFragment(const char *A,const char *AEnd,
const char *B,const char *BEnd)
{
if (A >= AEnd && B >= BEnd)
return 0;
if (A >= AEnd)
+ {
+ if (*B == '~') return 1;
return -1;
+ }
if (B >= BEnd)
+ {
+ if (*A == '~') return -1;
return 1;
-
+ }
+
/* Iterate over the whole string
- What this does is to spilt the whole string into groups of
+ What this does is to split the whole string into groups of
numeric and non numeric portions. For instance:
a67bhgs89
Has 4 portions 'a', '67', 'bhgs', '89'. A more normal:
const char *rhs = B;
while (lhs != AEnd && rhs != BEnd)
{
- // Starting points
- const char *Slhs = lhs;
- const char *Srhs = rhs;
-
- // Compute ending points were we have passed over the portion
- bool Digit = (isdigit(*lhs) > 0?true:false);
- for (;lhs != AEnd && (isdigit(*lhs) > 0?true:false) == Digit; lhs++);
- for (;rhs != BEnd && (isdigit(*rhs) > 0?true:false) == Digit; rhs++);
-
- if (Digit == true)
+ int first_diff = 0;
+
+ while (lhs != AEnd && rhs != BEnd &&
+ (!isdigit(*lhs) || !isdigit(*rhs)))
{
- // If the lhs has a digit and the rhs does not then <
- if (rhs - Srhs == 0)
- return -1;
-
- // Generate integers from the strings.
- unsigned long Ilhs = StrToLong(Slhs,lhs);
- unsigned long Irhs = StrToLong(Srhs,rhs);
- if (Ilhs != Irhs)
- {
- if (Ilhs > Irhs)
- return 1;
- return -1;
- }
+ int vc = order(*lhs);
+ int rc = order(*rhs);
+ if (vc != rc)
+ return vc - rc;
+ lhs++; rhs++;
}
- else
- {
- // They are equal length so do a straight text compare
- for (;Slhs != lhs && Srhs != rhs; Slhs++, Srhs++)
- {
- if (*Slhs != *Srhs)
- {
- /* We need to compare non alpha chars as higher than alpha
- chars (a < !) */
- int lc = *Slhs;
- int rc = *Srhs;
- if (isalpha(lc) == 0) lc += 256;
- if (isalpha(rc) == 0) rc += 256;
- if (lc > rc)
- return 1;
- return -1;
- }
- }
- // If the lhs is shorter than the right it is 'less'
- if (lhs - Slhs < rhs - Srhs)
- return -1;
+ while (*lhs == '0')
+ lhs++;
+ while (*rhs == '0')
+ rhs++;
+ while (isdigit(*lhs) && isdigit(*rhs))
+ {
+ if (!first_diff)
+ first_diff = *lhs - *rhs;
+ lhs++;
+ rhs++;
+ }
- // If the lhs is longer than the right it is 'more'
- if (lhs - Slhs > rhs - Srhs)
- return 1;
- }
+ if (isdigit(*lhs))
+ return 1;
+ if (isdigit(*rhs))
+ return -1;
+ if (first_diff)
+ return first_diff;
}
// The strings must be equal
// lhs is shorter
if (lhs == AEnd)
+ {
+ if (*rhs == '~') return 1;
return -1;
+ }
// rhs is shorter
if (rhs == BEnd)
+ {
+ if (*lhs == '~') return -1;
return 1;
-
+ }
+
// Shouldnt happen
return 1;
}
if (rhs == BEnd)
rhs = B;
+ // Special case: a zero epoch is the same as no epoch,
+ // so remove it.
+ if (lhs != A)
+ {
+ for (; *A == '0'; ++A);
+ if (A == lhs)
+ {
+ ++A;
+ ++lhs;
+ }
+ }
+ if (rhs != B)
+ {
+ for (; *B == '0'; ++B);
+ if (B == rhs)
+ {
+ ++B;
+ ++rhs;
+ }
+ }
+
// Compare the epoch
int Res = CmpFragment(A,lhs,B,rhs);
if (Res != 0)
dlhs++;
if (drhs != rhs)
drhs++;
-
- return CmpFragment(dlhs,AEnd,drhs,BEnd);
+
+ // no debian revision need to be treated like -0
+ if (*(dlhs-1) == '-' && *(drhs-1) == '-')
+ return CmpFragment(dlhs,AEnd,drhs,BEnd);
+ else if (*(dlhs-1) == '-')
+ {
+ const char* null = "0";
+ return CmpFragment(dlhs,AEnd,null, null+1);
+ }
+ else if (*(drhs-1) == '-')
+ {
+ const char* null = "0";
+ return CmpFragment(null, null+1, drhs, BEnd);
+ }
+ else
+ return 0;
}
/*}}}*/
// debVS::CheckDep - Check a single dependency /*{{{*/
projects / apt.git / blobdiff