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refactor(userspace/engine): turn falco_common into a namespace containing common static utilities

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Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>
This commit is contained in:
Jason Dellaluce
2022-04-06 12:57:23 +00:00
committed by poiana
parent b74dcbd851
commit 3201479392
2 changed files with 32 additions and 66 deletions
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70
userspace/engine/falco_common.cpp
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@@ -1,5 +1,5 @@
/*
Copyright (C) 2019 The Falco Authors.
Copyright (C) 2022 The Falco Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@@ -16,61 +16,39 @@ limitations under the License.
#include "falco_common.h"
std::vector<std::string> falco_common::priority_names = {
vector<string> falco_common::priority_names = {
"Emergency",
"Alert",
"Critical",
"Error",
"Warning",
"Notice",
"Informational",
"Debug"};
"Info",
"Debug"
};
falco_common::falco_common()
bool falco_common::parse_priority(string v, priority_type& out)
{
m_ls = lua_open();
if(!m_ls)
transform(v.begin(), v.end(), v.begin(), [](int c){return tolower(c);});
for (size_t i = 0; i < priority_names.size(); i++)
{
throw falco_exception("Cannot open lua");
}
luaL_openlibs(m_ls);
}
falco_common::~falco_common()
{
if(m_ls)
{
lua_close(m_ls);
}
}
void falco_common::init()
{
// Strings in the list lua_module_strings need to be loaded as
// lua modules, which also involves adding them to the
// package.module table.
for(const auto &pair : lua_module_strings)
{
lua_getglobal(m_ls, "package");
lua_getfield(m_ls, -1, "preload");
if(luaL_loadstring(m_ls, pair.first))
auto p = priority_names[i];
transform(p.begin(), p.end(), p.begin(), [](int c){return tolower(c);});
if (p.compare(0, v.size(), v) == 0)
{
throw falco_exception("Failed to load embedded lua code " +
string(pair.second) + ": " + lua_tostring(m_ls, -1));
}
lua_setfield(m_ls, -2, pair.second);
}
// Strings in the list lua_code_strings need to be loaded and
// evaluated so any public functions can be directly called.
for(const auto &str : lua_code_strings)
{
if(luaL_loadstring(m_ls, str) || lua_pcall(m_ls, 0, 0, 0))
{
throw falco_exception("Failed to load + evaluate embedded lua code " +
string(str) + ": " + lua_tostring(m_ls, -1));
out = (priority_type) i;
return true;
}
}
return false;
}
bool falco_common::format_priority(priority_type v, string& out)
{
if ((size_t) v < priority_names.size())
{
out = priority_names[(size_t) v];
return true;
}
return false;
}