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trick/trick_source/codegen/Interface_Code_Gen/CommentSaver.cpp
Scott Fennell 6618d09c15
issue 1065 llvm 11 support (#1066) 
* # 1065 all LLVM::StrRefs need to use str() to convert to std::string now

* #1065 retain backwards compatibility for llvm 3.4.2 (RHEL 7)

closes #1065

Co-authored-by: Scott Fennell <sfennell@Scotts-MacBook-Pro.local>
2020-10-21 22:33:53 -05:00

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#include <iostream>
#include <sstream>
#include <regex.h>
#include <algorithm>
#include "clang/Basic/FileManager.h"
#include "CommentSaver.hh"
#include "Utilities.hh"
CommentSaver::CommentSaver(clang::CompilerInstance & in_ci , HeaderSearchDirs & in_hsd ) : ci(in_ci) , hsd(in_hsd) {}
bool CommentSaver::HandleComment(clang::Preprocessor &PP, clang::SourceRange Comment) {
//Comment.getBegin().dump(sm) ;
if ( isInUserOrTrickCode( ci , Comment.getBegin() , hsd ) ) {
#if (LIBCLANG_MAJOR < 4) // TODO delete when RHEL 7 no longer supported
std::string file_name = ci.getSourceManager().getBufferName(Comment.getBegin()) ;
#else
std::string file_name = ci.getSourceManager().getBufferName(Comment.getBegin()).str() ;
#endif
char * resolved_path = almostRealPath( file_name.c_str() ) ;
if ( resolved_path != NULL ) {
unsigned int line_no = ci.getSourceManager().getSpellingLineNumber(Comment.getBegin()) ;
comment_map[std::string(resolved_path)][line_no] = Comment ;
free(resolved_path) ;
}
}
// returning false means we did not push any text back to the stream for further reads.
return false ;
}
std::string CommentSaver::getComment( clang::SourceRange sr ) {
if ( sr.isValid() ) {
/* fsl_begin and fsl_end are two pointers into the header file. We want the text between the two pointers. */
clang::FullSourceLoc fsl_begin(sr.getBegin() , ci.getSourceManager()) ;
clang::FullSourceLoc fsl_end(sr.getEnd() , ci.getSourceManager()) ;
std::string comment_text( fsl_begin.getCharacterData() ,
(size_t)(fsl_end.getCharacterData() - fsl_begin.getCharacterData())) ;
return comment_text ;
}
/* return an empty string if no comment found on this line of the file. */
return std::string() ;
}
std::string CommentSaver::getComment( std::string file_name , unsigned int line_no ) {
return getComment(comment_map[file_name][line_no]) ;
}
std::string CommentSaver::getTrickHeaderComment( std::string file_name ) {
std::map < unsigned int , clang::SourceRange >::iterator cit ;
std::string ret ;
char * resolved_path = almostRealPath( file_name.c_str() ) ;
if ( resolved_path != NULL ) {
if ( trick_header_comments.find(resolved_path) == trick_header_comments.end() ) {
trick_header_comments[resolved_path] = std::string() ;
for ( cit = comment_map[resolved_path].begin() ; cit != comment_map[resolved_path].end() ; cit++ ) {
std::string comment_str = getComment((*cit).second) ;
if ( comment_str.find("@trick_parse") != std::string::npos or
comment_str.find("\\trick_parse") != std::string::npos ) {
trick_header_comments[resolved_path] = getComment((*cit).second) ;
break ;
} else {
std::transform(comment_str.begin(), comment_str.end(), comment_str.begin(), ::toupper) ;
if ( comment_str.find("PURPOSE") != std::string::npos ) {
trick_header_comments[resolved_path] = getComment((*cit).second) ;
break ;
}
}
}
}
ret = trick_header_comments[resolved_path] ;
free(resolved_path) ;
}
return ret ;
}
void CommentSaver::getICGField( std::string file_name ) {
/* default the icg_no flags to false */
icg_no_found[file_name] = false ;
icg_no_comment_found[file_name] = false ;
std::string th_str = getTrickHeaderComment(file_name) ;
if ( ! th_str.empty() ) {
size_t trick_parse_keyword ;
if ( (trick_parse_keyword = th_str.find("trick_parse")) != std::string::npos ) {
size_t trick_parse_everything = th_str.find("everything", trick_parse_keyword) ;
size_t trick_parse_attributes = th_str.find("attributes", trick_parse_keyword) ;
size_t trick_parse_dep_only = th_str.find("dependencies_only", trick_parse_keyword) ;
size_t closing_brace = th_str.find("}", trick_parse_keyword) ;
if ( closing_brace != std::string::npos ) {
if ( trick_parse_everything != std::string::npos and
trick_parse_everything < closing_brace ) {
icg_no_comment_found[file_name] = false ;
icg_no_found[file_name] = false ;
} else if ( trick_parse_attributes != std::string::npos and
trick_parse_attributes < closing_brace ) {
icg_no_comment_found[file_name] = true ;
icg_no_found[file_name] = false ;
} else if ( trick_parse_dep_only != std::string::npos and
trick_parse_dep_only < closing_brace ) {
icg_no_comment_found[file_name] = false ;
icg_no_found[file_name] = true ;
} else {
std::cout << file_name << ": trick_parse directive found but no argument matched." << std::endl ;
std::cout << "Valid arguments are (everything|attributes|dependencies_only)" << std::endl ;
exit(-1) ;
}
}
} else {
std::transform(th_str.begin(), th_str.end(), th_str.begin(), ::toupper) ;
int ret ;
regex_t reg_expr ;
regmatch_t pmatch[10] ;
memset(pmatch , 0 , sizeof(pmatch)) ;
/* POSIX regular expressions are always greedy, making our job harder.
We have to use several regular expressions to get the types. This was
so much easier in perl! */
/* find the ICG field */
regcomp( &reg_expr , "(ICG:)" , REG_EXTENDED | REG_ICASE ) ;
ret = regexec( &reg_expr , th_str.c_str() , 10 , pmatch , 0 ) ;
regfree(&reg_expr) ;
if ( ret != 0 ) {
return ;
}
th_str = th_str.substr(pmatch[1].rm_eo) ;
/* find the end of the ICG field */
memset(pmatch , 0 , sizeof(pmatch)) ;
regcomp( &reg_expr , "(\\))" , REG_EXTENDED ) ;
ret = regexec( &reg_expr , th_str.c_str() , 10 , pmatch , 0 ) ;
regfree(&reg_expr) ;
if ( ret != 0 ) {
return ;
}
th_str = th_str.substr(0 , pmatch[1].rm_so) ;
/* test for NoComment */
memset(pmatch , 0 , sizeof(pmatch)) ;
regcomp( &reg_expr , "(NOCOMMENT)$" , REG_EXTENDED ) ;
ret = regexec( &reg_expr , th_str.c_str() , 10 , pmatch , 0 ) ;
regfree(&reg_expr) ;
if ( ret == 0 ) {
icg_no_comment_found[file_name] = true ;
}
/* test for No */
memset(pmatch , 0 , sizeof(pmatch)) ;
regcomp( &reg_expr , "(NO)$" , REG_EXTENDED ) ;
ret = regexec( &reg_expr , th_str.c_str() , 10 , pmatch , 0 ) ;
regfree(&reg_expr) ;
if ( ret == 0 ) {
icg_no_found[file_name] = true ;
icg_no_comment_found[file_name] = true ;
}
}
}
}
bool CommentSaver::hasTrickHeader( std::string file_name ) {
std::string th_str = getTrickHeaderComment(file_name) ;
return (! th_str.empty()) ;
}
bool CommentSaver::hasICGNo( std::string file_name ) {
if ( icg_no_found.find(file_name) == icg_no_found.end() ) {
getICGField(file_name) ;
}
return icg_no_found[file_name] ;
}
bool CommentSaver::hasICGNoComment( std::string file_name ) {
if ( icg_no_comment_found.find(file_name) == icg_no_comment_found.end() ) {
getICGField(file_name) ;
}
return icg_no_comment_found[file_name] ;
}
std::set< std::string > CommentSaver::getIgnoreTypes( std::string file_name ) {
std::set< std::string > ignore_types ;
std::string th_str = getTrickHeaderComment(file_name) ;
if ( th_str.empty() ) {
return ignore_types;
}
int ret ;
regex_t reg_expr ;
regmatch_t pmatch[10] ;
//std::cout << "here in getIgnoreTypes\n" << th_str << std::endl ;
size_t start = 0 ;
start = th_str.find( "trick_exclude_typename") ;
while ( start != std::string::npos ) {
start += strlen("trick_exclude_typename") ;
std::string temp_str = th_str.substr(start) ;
memset(pmatch , 0 , sizeof(pmatch)) ;
regcomp( &reg_expr , "^\\s*\\{\\s*(\\S+)\\s*\\}" , REG_EXTENDED ) ;
ret = regexec( &reg_expr , temp_str.c_str() , 10 , pmatch , 0 ) ;
regfree(&reg_expr) ;
if ( ret == 0 ) {
std::string item = temp_str.substr(pmatch[1].rm_so, pmatch[1].rm_eo) ;
// regular expression leaving trailing space and brace. Why?
item.erase(item.find_first_of(" \t}")) ;
//std::cout << "icg_ignore_types " << item << std::endl ;
ignore_types.insert(item) ;
}
start = th_str.find( "trick_exclude_typename", start ) ;
}
//std::transform(th_str.begin(), th_str.end(), th_str.begin(), ::toupper) ;
memset(pmatch , 0 , sizeof(pmatch)) ;
/* POSIX regular expressions are always greedy, making our job harder.
We have to use several regular expressions to get the types. This was
so much easier in perl! */
/* find the start of the ICG_IGNORE_TYPES field */
regcomp( &reg_expr , "(ICG[ _]IGNORE[ _]TYPE(S)?:)" , REG_EXTENDED | REG_ICASE ) ;
ret = regexec( &reg_expr , th_str.c_str() , 10 , pmatch , 0 ) ;
regfree(&reg_expr) ;
if ( !ret ) {
th_str = th_str.substr(pmatch[1].rm_eo) ;
/* find the end of the ICG_IGNORE_TYPES field */
memset(pmatch , 0 , sizeof(pmatch)) ;
regcomp( &reg_expr , "(\\)\\s*\\))" , REG_EXTENDED ) ;
ret = regexec( &reg_expr , th_str.c_str() , 10 , pmatch , 0 ) ;
regfree(&reg_expr) ;
if ( !ret ) {
th_str = th_str.substr(0 , pmatch[1].rm_so) ;
std::replace( th_str.begin(), th_str.end(), '(', ' ');
std::replace( th_str.begin(), th_str.end(), ')', ' ');
std::replace( th_str.begin(), th_str.end(), '\n', ' ');
std::stringstream ss(th_str);
std::string item;
while (std::getline(ss, item, ' ')) {
if ( ! item.empty() ) {
//std::cout << "icg_ignore_types " << item << std::endl ;
ignore_types.insert(item) ;
}
}
}
}
return ignore_types ;
}
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