simplecpp/main.cpp at master · Tal500/simplecpp · GitHub

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/*
 * simplecpp - A simple and high-fidelity C/C++ preprocessor library
 * Copyright (C) 2016-2023 simplecpp team
*/

#include"simplecpp.h"

#include<cstdlib>
#include<cstring>
#include<fstream>
#include<iostream>
#include<map>
#include<string>
#include<vector>

intmain(int argc, char **argv)
{
bool error = false;
constchar *filename = nullptr;
bool use_istream = false;
bool fail_on_error = false;

// Settings..
 simplecpp::DUI dui;
bool quiet = false;
bool error_only = false;
for (int i = 1; i < argc; i++) {
constchar * const arg = argv[i];
if (*arg == '-') {
bool found = false;
constchar c = arg[1];
switch (c) {
case'D': { // define symbol
constchar * const value = arg[2] ? (argv[i] + 2) : argv[++i];
 dui.defines.push_back(value);
 found = true;
break;
 }
case'U': { // undefine symbol
constchar * const value = arg[2] ? (argv[i] + 2) : argv[++i];
 dui.undefined.insert(value);
 found = true;
break;
 }
case'I': { // include path
constchar * const value = arg[2] ? (argv[i] + 2) : argv[++i];
 dui.includePaths.push_back(value);
 found = true;
break;
 }
case'i':
if (std::strncmp(arg, "-include=",9)==0) {
 dui.includes.push_back(arg+9);
 found = true;
 } elseif (std::strncmp(arg, "-is",3)==0) {
 use_istream = true;
 found = true;
 }
break;
case's':
if (std::strncmp(arg, "-std=",5)==0) {
 dui.std = arg + 5;
 found = true;
 }
break;
case'q':
 quiet = true;
 found = true;
break;
case'e':
 error_only = true;
 found = true;
break;
case'f':
 fail_on_error = true;
 found = true;
break;
 }
if (!found) {
 std::cout << "error: option '" << arg << "' is unknown." << std::endl;
 error = true;
 }
 } elseif (filename) {
 std::cout << "error: multiple filenames specified" << std::endl;
std::exit(1);
 } else {
 filename = arg;
 }
 }

if (error)
std::exit(1);

if (quiet && error_only) {
 std::cout << "error: -e cannot be used in conjunction with -q" << std::endl;
std::exit(1);
 }

if (!filename) {
 std::cout << "Syntax:" << std::endl;
 std::cout << "simplecpp [options] filename" << std::endl;
 std::cout << " -DNAME Define NAME." << std::endl;
 std::cout << " -IPATH Include path." << std::endl;
 std::cout << " -include=FILE Include FILE." << std::endl;
 std::cout << " -UNAME Undefine NAME." << std::endl;
 std::cout << " -std=STD Specify standard." << std::endl;
 std::cout << " -q Quiet mode (no output)." << std::endl;
 std::cout << " -is Use std::istream interface." << std::endl;
 std::cout << " -e Output errors only." << std::endl;
std::exit(0);
 }

 dui.removeComments = true;

// Perform preprocessing
 simplecpp::OutputList outputList;
 std::vector<std::string> files;
 simplecpp::TokenList *rawtokens;
if (use_istream) {
 std::ifstream f(filename);
if (!f.is_open()) {
 std::cout << "error: could not open file '" << filename << "'" << std::endl;
std::exit(1);
 }
 rawtokens = newsimplecpp::TokenList(f, files,filename,&outputList);
 } else {
 rawtokens = newsimplecpp::TokenList(filename,files,&outputList);
 }
 rawtokens->removeComments();
 simplecpp::TokenList outputTokens(files);
 std::map<std::string, simplecpp::TokenList*> filedata;
simplecpp::preprocess(outputTokens, *rawtokens, files, filedata, dui, &outputList);
simplecpp::cleanup(filedata);
delete rawtokens;
 rawtokens = nullptr;

// Output
if (!quiet) {
if (!error_only)
 std::cout << outputTokens.stringify() << std::endl;

for (const simplecpp::Output &output : outputList) {
 std::cerr << output.location.file() << ':' << output.location.line << ": ";
switch (output.type) {
case simplecpp::Output::ERROR:
 std::cerr << "#error: ";
break;
case simplecpp::Output::WARNING:
 std::cerr << "#warning: ";
break;
case simplecpp::Output::MISSING_HEADER:
 std::cerr << "missing header: ";
break;
case simplecpp::Output::INCLUDE_NESTED_TOO_DEEPLY:
 std::cerr << "include nested too deeply: ";
break;
case simplecpp::Output::SYNTAX_ERROR:
 std::cerr << "syntax error: ";
break;
case simplecpp::Output::PORTABILITY_BACKSLASH:
 std::cerr << "portability: ";
break;
case simplecpp::Output::UNHANDLED_CHAR_ERROR:
 std::cerr << "unhandled char error: ";
break;
case simplecpp::Output::EXPLICIT_INCLUDE_NOT_FOUND:
 std::cerr << "explicit include not found: ";
break;
case simplecpp::Output::FILE_NOT_FOUND:
 std::cerr << "file not found: ";
break;
case simplecpp::Output::DUI_ERROR:
 std::cerr << "dui error: ";
break;
 }
 std::cerr << output.msg << std::endl;
 }
 }

if (fail_on_error && !outputList.empty())
return1;

return0;
}