diff options
Diffstat (limited to 'Source/cmIfCommand.cxx')
| -rw-r--r-- | Source/cmIfCommand.cxx | 48 |
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") |