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251 lines (232 loc) · 8.27 KB
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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 <sys/stat.h>
#include <string>
#include <utility>
#include <vector>
static bool isDir(const std::string& path)
{
struct stat file_stat;
if (stat(path.c_str(), &file_stat) == -1)
return false;
return (file_stat.st_mode & S_IFMT) == S_IFDIR;
}
int main(int argc, char **argv)
{
bool error = false;
const char *filename = nullptr;
bool use_istream = false;
bool fail_on_error = false;
bool linenrs = false;
// Settings..
simplecpp::DUI dui;
dui.removeComments = true;
bool quiet = false;
bool error_only = false;
for (int i = 1; i < argc; i++) {
const char * const arg = argv[i];
if (*arg == '-') {
bool found = false;
const char c = arg[1];
switch (c) {
case 'D': { // define symbol
found = true;
const char * const value = arg[2] ? (argv[i] + 2) : argv[++i];
if (!value) {
std::cout << "error: option -D with no value." << std::endl;
error = true;
break;
}
dui.defines.emplace_back(value);
break;
}
case 'U': { // undefine symbol
found = true;
const char * const value = arg[2] ? (argv[i] + 2) : argv[++i];
if (!value) {
std::cout << "error: option -U with no value." << std::endl;
error = true;
break;
}
dui.undefined.insert(value);
break;
}
case 'I': { // include path
found = true;
const char * const value = arg[2] ? (arg + 2) : argv[++i];
if (!value) {
std::cout << "error: option -I with no value." << std::endl;
error = true;
break;
}
dui.includePaths.emplace_back(value);
break;
}
case 'i':
if (std::strncmp(arg, "-include=",9)==0) {
found = true;
std::string value = arg + 9;
if (value.empty()) {
std::cout << "error: option -include with no value." << std::endl;
error = true;
break;
}
dui.includes.emplace_back(std::move(value));
} else if (std::strncmp(arg, "-is",3)==0) {
found = true;
use_istream = true;
}
break;
case 's':
if (std::strncmp(arg, "-std=",5)==0) {
found = true;
std::string value = arg + 5;
if (value.empty()) {
std::cout << "error: option -std with no value." << std::endl;
error = true;
break;
}
dui.std = std::move(value);
}
break;
case 'q':
found = true;
quiet = true;
break;
case 'e':
found = true;
error_only = true;
break;
case 'f':
found = true;
fail_on_error = true;
break;
case 'l':
linenrs = true;
found = true;
break;
}
if (!found) {
std::cout << "error: option '" << arg << "' is unknown." << std::endl;
error = true;
}
} else if (filename) {
std::cout << "error: multiple filenames specified" << std::endl;
return 1;
} else {
filename = arg;
}
}
if (error)
return 1;
if (quiet && error_only) {
std::cout << "error: -e cannot be used in conjunction with -q" << std::endl;
return 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::cout << " -f Fail when errors were encountered (exitcode 1)." << std::endl;
std::cout << " -l Print lines numbers." << std::endl;
return 0;
}
// TODO: move this logic into simplecpp
bool inp_missing = false;
for (const std::string& inc : dui.includes) {
std::ifstream f(inc);
if (!f.is_open() || isDir(inc)) {
inp_missing = true;
std::cout << "error: could not open include '" << inc << "'" << std::endl;
}
}
for (const std::string& inc : dui.includePaths) {
if (!isDir(inc)) {
inp_missing = true;
std::cout << "error: could not find include path '" << inc << "'" << std::endl;
}
}
std::ifstream f(filename);
if (!f.is_open() || isDir(filename)) {
inp_missing = true;
std::cout << "error: could not open file '" << filename << "'" << std::endl;
}
if (inp_missing)
return 1;
// Perform preprocessing
simplecpp::OutputList outputList;
std::vector<std::string> files;
simplecpp::TokenList outputTokens(files);
{
simplecpp::TokenList *rawtokens;
if (use_istream) {
rawtokens = new simplecpp::TokenList(f, files,filename,&outputList);
} else {
f.close();
rawtokens = new simplecpp::TokenList(filename,files,&outputList);
}
rawtokens->removeComments();
simplecpp::FileDataCache filedata;
simplecpp::preprocess(outputTokens, *rawtokens, files, filedata, dui, &outputList);
simplecpp::cleanup(filedata);
delete rawtokens;
}
// Output
if (!quiet) {
if (!error_only)
std::cout << outputTokens.stringify(linenrs) << 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())
return 1;
return 0;
}