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Diffstat (limited to 'src/usr/targeting/common/predicates/predicatepostfixexpr.C')
| -rw-r--r-- | src/usr/targeting/common/predicates/predicatepostfixexpr.C | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/src/usr/targeting/common/predicates/predicatepostfixexpr.C b/src/usr/targeting/common/predicates/predicatepostfixexpr.C new file mode 100644 index 000000000..babebfb1f --- /dev/null +++ b/src/usr/targeting/common/predicates/predicatepostfixexpr.C @@ -0,0 +1,220 @@ +// IBM_PROLOG_BEGIN_TAG +// This is an automatically generated prolog. +// +// $Source: src/usr/targeting/predicates/predicatepostfixexpr.C $ +// +// IBM CONFIDENTIAL +// +// COPYRIGHT International Business Machines Corp. 2011 +// +// p1 +// +// Object Code Only (OCO) source materials +// Licensed Internal Code Source Materials +// IBM HostBoot Licensed Internal Code +// +// The source code for this program is not published or other- +// wise divested of its trade secrets, irrespective of what has +// been deposited with the U.S. Copyright Office. +// +// Origin: 30 +// +// IBM_PROLOG_END + +/** + * @file targeting/common/predicates/predicatepostfixexpr.C + * + * @brief Implementation for predicate which allows callers to chain multiple + * other predicates together in complex logical expressions, and then + * evaluate them against a target + */ + +//****************************************************************************** +// Includes +//****************************************************************************** + +// STD + +// Other Host Boot Components +#include <targeting/adapters/assertadapter.H> + +// Targeting Component +#include <targeting/common/predicates/predicates.H> +#include <targeting/common/trace.H> + +//****************************************************************************** +// Macros +//****************************************************************************** + +#undef TARG_NAMESPACE +#undef TARG_CLASS +#undef TARG_FN + +//****************************************************************************** +// Interface +//****************************************************************************** + +namespace TARGETING +{ + +#define TARG_NAMESPACE "TARGETING::" +#define TARG_CLASS "PredicatePostfixExpr::" + +//****************************************************************************** +// PredicatePostfixExpr::PredicatePostfixExpr +//****************************************************************************** + +PredicatePostfixExpr::PredicatePostfixExpr() +{ +} + +//****************************************************************************** +// PredicatePostfixExpr::~PredicatePostfixExpr +//****************************************************************************** + +PredicatePostfixExpr::~PredicatePostfixExpr() +{ +} + +//****************************************************************************** +// PredicatePostfixExpr::push +//****************************************************************************** + +PredicatePostfixExpr& PredicatePostfixExpr::push( + const PredicateBase* const i_pPredicate) +{ + #define TARG_FN "push(...)" + + TARG_ASSERT(i_pPredicate != NULL, + TARG_LOC "Caller supplied a NULL predicate"); + Operation l_op = {EVAL,i_pPredicate}; + iv_ops.push_back(l_op); + return *this; + + #undef TARG_FN +} + +//****************************************************************************** +// PredicatePostfixExpr::And +//****************************************************************************** + +PredicatePostfixExpr& PredicatePostfixExpr::And() +{ + #define TARG_FN "And()" + + Operation l_op = {AND,NULL}; + iv_ops.push_back(l_op); + return *this; + + #undef TARG_FN +} + +//****************************************************************************** +// PredicatePostfixExpr::Not +//****************************************************************************** + +PredicatePostfixExpr& PredicatePostfixExpr::Not() +{ + #define TARG_FN "Not()" + + Operation l_op = {NOT,NULL}; + iv_ops.push_back(l_op); + return *this; + + #undef TARG_FN +} + +//****************************************************************************** +// PredicatePostfixExpr::Or +//****************************************************************************** + +PredicatePostfixExpr& PredicatePostfixExpr::Or() +{ + #define TARG_FN "Or()" + + Operation l_op = {OR,NULL}; + iv_ops.push_back(l_op); + return *this; + + #undef TARG_FN +} + +//****************************************************************************** +// PredicatePostfixExpr::operator() +//****************************************************************************** + +bool PredicatePostfixExpr::operator()( + const Target* const i_pTarget) const +{ + #define TARG_FN "operator()(...)" + + TARG_ASSERT(i_pTarget != NULL, + TARG_LOC "Caller supplied a NULL target"); + + std::vector<bool> l_stack; + bool l_result = false; + + for(uint32_t i=0; i<iv_ops.size(); ++i) + { + switch(iv_ops[i].logicalOp) + { + case EVAL: + l_stack.push_back((*iv_ops[i].pPredicate)(i_pTarget)); + break; + case AND: + TARG_ASSERT(l_stack.size() >= 2, + TARG_LOC "Stack for AND must be >=2 but is %d", + l_stack.size()); + l_result = l_stack.back(); + l_stack.pop_back(); + l_stack.back() = (l_stack.back() & l_result); + break; + case OR: + TARG_ASSERT(l_stack.size() >= 2, + TARG_LOC "Stack for OR must be >= 2 but is %d", + l_stack.size()); + l_result = l_stack.back(); + l_stack.pop_back(); + l_stack.back() = (l_stack.back() | l_result); + break; + case NOT: + TARG_ASSERT(l_stack.size() >= 1, + TARG_LOC "Stack for NOT must be >= 1 but is %d", + l_stack.size()); + l_stack.back() = !l_stack.back(); + break; + default: + TARG_ASSERT(0, + TARG_LOC "Attempted to evaluate unsupported " + "logical operation %d", + iv_ops[i].logicalOp); + break; + } + } + + // If no predicates and we haven't asserted (no misformatting), element + // should be returned + if(l_stack.size() == 0) + { + l_result = true; + } + else + { + TARG_ASSERT(l_stack.size() == 1, + TARG_LOC "Postfix expression created incorrectly. Stack " + "size should be 1 but is %d", + l_stack.size()); + + l_result = l_stack.front(); + } + + return l_result; + + #undef TARG_FN +} + +#undef TARG_CLASS +#undef TARG_NAMESPACE + +} // End namespace TARGETING + |
