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use effective way to check if file exists

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ValKmjolnir
2022-04-21 20:51:47 +08:00
parent 6e035d1951
commit 2dc8459cbf
2 changed files with 17 additions and 8 deletions
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nasal_import.h
+15 -6
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@@ -66,6 +66,11 @@ nasal_ast nasal_import::file_import(nasal_ast& node)
// avoid infinite loading loop
if(check_exist(filename))
return {0,ast_root};
if(access(filename.c_str(),F_OK)==-1)
{
nerr.err("link","cannot open file <"+filename+">");
return {0,ast_root};
}
// start importing...
lex.scan(filename);
@@ -86,17 +91,21 @@ nasal_ast nasal_import::lib_import()
"stl/lib.nas"
};
std::string filename;
std::string filename="";
for(auto& i:libpath)
{
std::ifstream fin(i);
if(!fin.fail())
if(access(i.c_str(),F_OK)!=-1)
{
filename=i;
fin.close();
break;
}
fin.close();
if(!filename.length())
{
std::string paths="";
for(auto& i:libpath)
paths+=" "+i+"\n";
nerr.err("link","cannot find lib file in these paths:\n"+paths,' ');
nerr.chkerr();
return {0,ast_root};
}
// avoid infinite loading loop