diff options
Diffstat (limited to 'Source/cmGeneratorExpression.cxx')
-rw-r--r-- | Source/cmGeneratorExpression.cxx | 88 |
1 files changed, 80 insertions, 8 deletions
diff --git a/Source/cmGeneratorExpression.cxx b/Source/cmGeneratorExpression.cxx index 3fd4a5f..841fbb7 100644 --- a/Source/cmGeneratorExpression.cxx +++ b/Source/cmGeneratorExpression.cxx @@ -123,15 +123,9 @@ cmCompiledGeneratorExpression::~cmCompiledGeneratorExpression() } } -std::string cmGeneratorExpression::Preprocess(const std::string &input, - PreprocessContext context) +//---------------------------------------------------------------------------- +static std::string stripAllGeneratorExpressions(const std::string &input) { - if (context != StripAllGeneratorExpressions) - { - assert(!"cmGeneratorExpression::Preprocess called with invalid args"); - return std::string(); - } - std::string result; std::string::size_type pos = 0; std::string::size_type lastPos = pos; @@ -170,3 +164,81 @@ std::string cmGeneratorExpression::Preprocess(const std::string &input, result += input.substr(lastPos); return result; } + +//---------------------------------------------------------------------------- +static std::string stripExportInterface(const std::string &input, + cmGeneratorExpression::PreprocessContext context) +{ + std::string result; + + std::string::size_type pos = 0; + std::string::size_type lastPos = pos; + while((pos = input.find("$<BUILD_INTERFACE:", lastPos)) != input.npos + || (pos = input.find("$<INSTALL_INTERFACE:", lastPos)) != input.npos) + { + result += input.substr(lastPos, pos - lastPos); + const bool gotInstallInterface = input[pos + 2] == 'I'; + pos += gotInstallInterface ? sizeof("$<INSTALL_INTERFACE:") - 1 + : sizeof("$<BUILD_INTERFACE:") - 1; + int nestingLevel = 1; + const char *c = input.c_str() + pos; + const char * const cStart = c; + for ( ; *c; ++c) + { + if(c[0] == '$' && c[1] == '<') + { + ++nestingLevel; + ++c; + continue; + } + if(c[0] == '>') + { + --nestingLevel; + if (nestingLevel != 0) + { + continue; + } + if(context == cmGeneratorExpression::BuildInterface + && !gotInstallInterface) + { + result += input.substr(pos, c - cStart); + } + else if(context == cmGeneratorExpression::InstallInterface + && gotInstallInterface) + { + result += input.substr(pos, c - cStart); + } + break; + } + } + const std::string::size_type traversed = (c - cStart) + 1; + if (!*c) + { + result += std::string(gotInstallInterface ? "$<INSTALL_INTERFACE:" + : "$<BUILD_INTERFACE:") + + input.substr(pos, traversed); + } + pos += traversed; + lastPos = pos; + } + result += input.substr(lastPos); + + return result; +} + +//---------------------------------------------------------------------------- +std::string cmGeneratorExpression::Preprocess(const std::string &input, + PreprocessContext context) +{ + if (context == StripAllGeneratorExpressions) + { + return stripAllGeneratorExpressions(input); + } + else if (context == BuildInterface || context == InstallInterface) + { + return stripExportInterface(input, context); + } + + assert(!"cmGeneratorExpression::Preprocess called with invalid args"); + return std::string(); +} |