summaryrefslogtreecommitdiffstats
path: root/Source/cmIfCommand.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'Source/cmIfCommand.cxx')
-rw-r--r--Source/cmIfCommand.cxx48
1 files changed, 48 insertions, 0 deletions
diff --git a/Source/cmIfCommand.cxx b/Source/cmIfCommand.cxx
index e82a8fb..8c22602 100644
--- a/Source/cmIfCommand.cxx
+++ b/Source/cmIfCommand.cxx
@@ -285,6 +285,34 @@ namespace
}
//=========================================================================
+ enum Op { OpLess, OpEqual, OpGreater };
+ bool HandleVersionCompare(Op op, const char* lhs_str, const char* rhs_str)
+ {
+ // Parse out up to 4 components.
+ unsigned int lhs[4] = {0,0,0,0};
+ unsigned int rhs[4] = {0,0,0,0};
+ sscanf(lhs_str, "%u.%u.%u.%u", &lhs[0], &lhs[1], &lhs[2], &lhs[3]);
+ sscanf(rhs_str, "%u.%u.%u.%u", &rhs[0], &rhs[1], &rhs[2], &rhs[3]);
+
+ // Do component-wise comparison.
+ for(unsigned int i=0; i < 4; ++i)
+ {
+ if(lhs[i] < rhs[i])
+ {
+ // lhs < rhs, so true if operation is LESS
+ return op == OpLess;
+ }
+ else if(lhs[i] > rhs[i])
+ {
+ // lhs > rhs, so true if operation is GREATER
+ return op == OpGreater;
+ }
+ }
+ // lhs == rhs, so true if operation is EQUAL
+ return op == OpEqual;
+ }
+
+ //=========================================================================
// level 0 processes parenthetical expressions
bool HandleLevel0(std::list<std::string> &newArgs,
cmMakefile *makefile,
@@ -552,6 +580,26 @@ namespace
reducible, arg, newArgs, argP1, argP2);
}
+ if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
+ (*(argP1) == "VERSION_LESS" || *(argP1) == "VERSION_GREATER" ||
+ *(argP1) == "VERSION_EQUAL"))
+ {
+ def = cmIfCommand::GetVariableOrString(arg->c_str(), makefile);
+ def2 = cmIfCommand::GetVariableOrString((argP2)->c_str(), makefile);
+ Op op = OpEqual;
+ if(*argP1 == "VERSION_LESS")
+ {
+ op = OpLess;
+ }
+ else if(*argP1 == "VERSION_GREATER")
+ {
+ op = OpGreater;
+ }
+ bool result = HandleVersionCompare(op, def, def2);
+ HandleBinaryOp(result,
+ reducible, arg, newArgs, argP1, argP2);
+ }
+
// is file A newer than file B
if (argP1 != newArgs.end() && argP2 != newArgs.end() &&
*(argP1) == "IS_NEWER_THAN")