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@version_compare() function

 
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henrywood
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Joined: 21 Sep 2004
Posts: 66
Location: Copenhagen, Denmark

PostPosted: Fri Aug 05, 2005 12:09 am    Post subject: @version_compare() function Reply with quote

In case anyone needs a decent version_compare version, partially modelled after PHP's version of the same name


Henrik



Code:

#-----------------------------------------------------------------------------#
#                                                                             #
# Version Compare 1.0                                                         #
#                                                                             #
# Author:                                       Henrik Skov                   #
#                                                                             #
# Copyright:                                    2005                          #
#                                                                             #
#-----------------------------------------------------------------------------#

#define function,replace
#define function,version_compare

%%IEVER = @verinfo(@windir(S)\shdocvw.dll,V)
%%IEREQ = 6.0

%%OK = @version_compare(%%IEVER,%%IEREQ)
info OK: %%OK

stop

################################################################################
#
# %%OK = @version_compare(<version1>,<version2>,<[compare_operator = "=>" ]>, <[returnBuildInfo = FALSE]>, <[replaceParenthesis = FALSE]>
#
################################################################################
#
# Returns TRUS (1) if the relationship between version1 and version2 is as specified by
# the compare operator.
#
# <version1>               First version string
#
# <version2>               Second version string
#
# <[compare_operator]>     Possible compare operators:
#
#                          lt,  le,  gt, >=, ge, ==, =, eq, !=,
#                          <, lt, <=, le, >, gt, >=, ge, ==, =, eq, !=, <>, ne
#
# <[returnBuldInfo]>       If specified, anything after a space in the version1 string is
#                          returned and no version comparison is done
#
# <[replaceParenthesis]>   If specified, any parenthesis (both () and []) will be removed
#                          before the BuildInfo part is returned
#
################################################################################
#
# TODO:
# -------------------
#                          - Add support for alpha, RC, beta or other build strings
#                            so that they are part of the version comparison
#
#                          - Model after PHP's version_compare() 100%
#                            See: http://dk2.php.net/version_compare
#
################################################################################

:VERSION_COMPARE
if @not(@both(%1,%2))
   error 2
   exit
end

# Default compare_operator
if @not(%3)
   %3 = "=>"
end

option decimalsep,"."

%A = @fsep()
option fieldsep," "
parse "%V;%D",%1

#
if @both(%5,@not(%4))
   error 2
   exit
end

# Should we return Build info ?
if %4

   if %5
   
      %D = @replace("(",,%D)
      %D = @replace(")",,%D)
      %D = @replace("[",,%D)   
      %D = @replace("]",,%D)   

   end
   
   exit %D

end

# Store pos of first '.' to find major ver
%P = @pos(".",%V)

# Major
%M = @substr(%V,1,@pred(%P))

#info Major: %M

# Minor
%P = @succ(%P)
%I = @substr(%V,%P,@len(%V))
#info Minor: %I

# Remove .
%N = @replace(".",,%I)
option fieldsep,%A

%V = %M.%N

#info In: %1@cr()InConv: %V

# Now test
if @equal(%3,>=)@equal(%3,=>)@equal(%3,ge)

  if @greater(%V,%2)@equal(%V,%2)
      %R = 1
   else
      %R =
   end

elsif @equal(%3,<=)@equal(%3,=<)@equal(%3,le)

  if @not(@greater(%V,%2))@equal(%V,%2)
      %R = 1
   else
      %R =
   end

elsif @equal(%3,=)@equal(%3,==)@equal(%3,eq)

  if @equal(%V,%2)
      %R = 1
   else
      %R =
   end

elsif @equal(%3,<)@equal(%3,lt)

  if @not(@greater(%V,%2))
      %R = 1
   else
      %R =
   end

elsif @equal(%3,>)@equal(%3,gt)

  if @greater(%V,%2)
      %R = 1
   else
      %R =
   end

elsif @equal(%3,!=)@equal(%3,ne)@equal(%3,<>)

  if @not(@equal(%V,%2))
      %R = 1
   else
      %R =
   end
 
end

exit %R

######################################################################################################################################################
# %%NEWSTRING = @replace(search,replace,source)

:REPLACE
list create,28
list add,28,%3
%R = %2
%S = %1

 %%index = 0
  repeat
    %%instring = @item(28,%%index)
    %%newstring = ""
    repeat
      %%pos = @pos(%S,%%instring)
      if @greater(%%pos,0)
        if @equal(%%pos,1)
          %%newstring = %%newstring%R
        else
          %%newstring = %%newstring@substr(%%instring,1,@pred(%%pos))%R
        end
        %%instring = @strdel(%%instring,1,@pred(@sum(%%pos,@len(%S))))
      end
    until @equal(%%pos,0)
    %%newstring = %%newstring%%instring
    list put,28,%%newstring
    %%index = @succ(%%index)
  until @equal(%%index,@count(2Cool)
 
  %%NEW = @substr(@text(2Cool,1,@pred(@len(@text(2Cool)))
  list close,28
  exit %%NEW
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