Added version handling

1 files changed, 214 insertions, 0 deletions

diff --git a/noncore/settings/aqpkg/version.cpp b/noncore/settings/aqpkg/version.cpp
new file mode 100644
index 0000000..e836da1
--- a/dev/null
+++ b/noncore/settings/aqpkg/version.cpp
@@ -0,0 +1,214 @@
+/*
+ * libdpkg - Debian packaging suite library routines
+ * vercmp.c - comparison of version numbers
+ *
+ * Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
+ *
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2,
+ * or (at your option) any later version.
+ *
+ * This is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with dpkg; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+
+# define _(Text) Text
+
+class versionrevision
+{
+public:
+    versionrevision()
+    {
+        version = 0;
+    }
+
+    ~versionrevision()
+    {
+        if ( version )
+            delete version;
+    }
+
+    void setVersion( const char *str )
+    {
+        version = new char[(strlen(str)+1)];
+        strcpy( version, str );
+    }
+    
+  unsigned long epoch;
+  char *version;
+  const char *revision;
+  const char *familiar_revision;
+};  
+
+static int verrevcmp(const char *val, const char *ref) 
+{
+  int vc, rc;
+  long vl, rl;
+  const char *vp, *rp;
+
+  if (!val) val= "";
+  if (!ref) ref= "";
+  for (;;) {
+    vp= val;  while (*vp && !isdigit(*vp)) vp++;
+    rp= ref;  while (*rp && !isdigit(*rp)) rp++;
+    for (;;) {
+      vc= val == vp ? 0 : *val++;
+      rc= ref == rp ? 0 : *ref++;
+      if (!rc && !vc) break;
+      if (vc && !isalpha(vc)) vc += 256; /* assumes ASCII character set */
+      if (rc && !isalpha(rc)) rc += 256;
+      if (vc != rc) return vc - rc;
+    }
+    val= vp;
+    ref= rp;
+    vl=0;  if (isdigit(*vp)) vl= strtol(val,(char**)&val,10);
+    rl=0;  if (isdigit(*rp)) rl= strtol(ref,(char**)&ref,10);
+    if (vl != rl) return vl - rl;
+    if (!*val && !*ref) return 0;
+    if (!*val) return -1;
+    if (!*ref) return +1;
+  }
+}
+
+int versioncompare(const struct versionrevision *version,
+                   const struct versionrevision *refversion) 
+{
+  int r;
+
+  if (version->epoch > refversion->epoch) return 1;
+  if (version->epoch < refversion->epoch) return -1;
+  r= verrevcmp(version->version,refversion->version);  if (r) return r;
+  r= verrevcmp(version->revision,refversion->revision); if (r) return r;
+  return verrevcmp(version->familiar_revision,refversion->familiar_revision);
+}
+
+int versionsatisfied3(const struct versionrevision *it,
+                      const struct versionrevision *ref,
+                      const char *op) 
+{
+  int r;
+  r= versioncompare(it,ref);
+  if (strcmp(op, "<=") == 0 || strcmp(op, "<") == 0)
+    return r <= 0;
+  if (strcmp(op, ">=") == 0 || strcmp(op, ">") == 0)
+    return r >= 0;
+  if (strcmp(op, "<<") == 0)
+    return r < 0;
+  if (strcmp(op, ">>") == 0)
+    return r > 0;
+  if (strcmp(op, "=") == 0)
+    return r == 0;
+  fprintf(stderr, "unknown operator: %s", op);
+
+  exit(1);
+}
+
+const char *parseversion(struct versionrevision *rversion, const char *string) 
+{
+  char *hyphen, *colon, *eepochcolon;
+  unsigned long epoch;
+
+  if (!*string) return _("version string is empty");
+  
+  colon= strchr(string,':');
+  if (colon) {
+    epoch= strtoul(string,&eepochcolon,10);
+    if (colon != eepochcolon) return _("epoch in version is not number");
+    if (!*++colon) return _("nothing after colon in version number");
+    string= colon;
+    rversion->epoch= epoch;
+  } else {
+    rversion->epoch= 0;
+  }
+
+  rversion->revision = "";
+  rversion->familiar_revision = "";
+
+  rversion->setVersion( string );
+  hyphen= strrchr(rversion->version,'-');
+  if (hyphen) {
+    *hyphen++= 0;
+    if (strncmp("fam", hyphen, 3) == 0) {
+      rversion->familiar_revision=hyphen+3;
+      hyphen= strrchr(rversion->version,'-');
+      if (hyphen) {
+	*hyphen++= 0;
+	rversion->revision = hyphen;
+      }
+    } else {
+      rversion->revision = hyphen;
+    }
+  }
+/*
+  fprintf(stderr,"Parsed version: %lu, %s, %s, %s\n",
+	  rversion->epoch,
+	  rversion->version,
+	  rversion->revision,
+	  rversion->familiar_revision);
+*/  
+  return 0;
+}
+
+int compareVersions( const char *v1, const char *v2 )
+{
+  const char *err;
+  versionrevision ver, ref;
+
+  err = parseversion(&ref, v1);
+  if (err) {
+    fprintf(stderr, "Invalid version `%s': %s\n", v2, err);
+    return -2;
+  }
+
+  err = parseversion(&ver, v2);
+  if (err) {
+    fprintf(stderr, "Invalid version `%s': %s\n", v1, err);
+    return -2;
+  }
+
+  if ( versionsatisfied3( &ver, &ref, "=" ) )
+    return 0;
+  else if ( versionsatisfied3( &ver, &ref, "<" ) )
+    return -1;
+  else
+    return 1;
+}
+
+/*
+int main(int argc, char *argv[]) 
+{
+  const char *err;
+  versionrevision ver, ref;
+
+  if (argc < 4) {
+    fprintf(stderr, "usage: %s: version op refversion\n", argv[0]);
+    return 2;
+  }
+
+  err = parseversion(&ver, argv[1]);
+  if (err) {
+    fprintf(stderr, "Invalid version `%s': %s\n", argv[1], err);
+    return 2;
+  }
+    
+  err = parseversion(&ref, argv[3]);
+  if (err) {
+    fprintf(stderr, "Invalid version `%s': %s\n", argv[3], err);
+    return 2;
+  }
+
+  printf( "Result: %d\n", versionsatisfied3(&ver, &ref, argv[2]) );
+}
+
+*/