codon/codon/parser/common.cpp at develop · strider4560/codon · GitHub

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#include "common.h"

#include <cinttypes>

#include <climits>

#include <filesystem>

#include <string>

#include <vector>

#include "codon/compiler/compiler.h"

#include "codon/parser/cache.h"

#include "llvm/Support/FileSystem.h"

#include "llvm/Support/Path.h"

#include <fmt/format.h>

#include <cmrc/cmrc.hpp>

CMRC_DECLARE(codon);

namespace codon::ast {

IFilesystem::path_t IFilesystem::canonical(const path_t &path) const {

return std::filesystem::weakly_canonical(path);

}

void IFilesystem::add_search_path(const std::string &p) {

auto path = path_t(p);

if (exists(path)) {

search_paths.emplace_back(canonical(path));

}

std::vector<IFilesystem::path_t> IFilesystem::get_stdlib_paths() const {

return search_paths;

}

ImportFile IFilesystem::get_root(const path_t &sp) const {

bool isStdLib = false;

std::string s = sp;

std::string root;

for (auto &p : get_stdlib_paths())

if (startswith(s, p)) {

root = p;

isStdLib = true;

break;

}

auto module0 = get_module0().parent_path();

if (!isStdLib && !module0.empty() && startswith(s, module0))

root = module0;

std::string ext = ".codon";

if (!((root.empty() || startswith(s, root)) && endswith(s, ext)))

ext = ".py";

seqassertn((root.empty() || startswith(s, root)) && endswith(s, ext),

"bad path substitution: {}, {}", s, root);

auto module = s.substr(root.size() + 1, s.size() - root.size() - ext.size() - 1);

std::ranges::replace(module, '/', '.');

return ImportFile{(!isStdLib && root == module0) ? ImportFile::PACKAGE

: ImportFile::STDLIB,

s, module};

}

Filesystem::Filesystem(const std::string &argv0, const std::string &module0)

: argv0(argv0), module0(module0) {

if (auto p = getenv("CODON_PATH")) {

add_search_path(p);

}

if (!argv0.empty()) {

auto root = executable_path(argv0.c_str()).parent_path();

for (auto loci : {"../lib/codon/stdlib", "../stdlib", "stdlib"}) {

add_search_path(root / loci);

}

for (auto loci : {"../lib/codon/plugins", "../plugins"}) {

add_search_path(root / loci);

}

std::vector<std::string> Filesystem::read_lines(const path_t &path) const {

std::vector<std::string> lines;

if (path == "-") {

for (std::string line; getline(std::cin, line);) {

lines.push_back(line);

}

} else {

std::ifstream fin(path);

if (!fin)

E(error::Error::COMPILER_NO_FILE, SrcInfo(), path);

for (std::string line; getline(fin, line);) {

lines.push_back(line);

}

fin.close();

}

return lines;

}

void Filesystem::set_module0(const std::string &s) { module0 = canonical(path_t(s)); }

IFilesystem::path_t Filesystem::get_module0() const {

return module0.empty() ? IFilesystem::path_t() : canonical(module0);

}

IFilesystem::path_t Filesystem::executable_path(const char *argv0) {

auto exc = llvm::sys::fs::getMainExecutable(

argv0, reinterpret_cast<void *>(executable_path));

return path_t(exc);

}

bool Filesystem::exists(const IFilesystem::path_t &path) const {

return std::filesystem::exists(path);

}

ResourceFilesystem::ResourceFilesystem(const std::string &argv0,

const std::string &module0, bool allowExternal)

: Filesystem(argv0, module0), allowExternal(allowExternal) {

search_paths = {"/stdlib"};

}

std::vector<std::string> ResourceFilesystem::read_lines(const path_t &path) const {

auto fs = cmrc::codon::get_filesystem();

if (!fs.exists(path) && allowExternal)

return Filesystem::read_lines(path);

std::vector<std::string> lines;

if (path == "-") {

E(error::Error::COMPILER_NO_FILE, SrcInfo(), "<stdin>");

} else {

try {

auto fd = fs.open(path);

auto contents = std::string(fd.begin(), fd.end());

lines = split(contents, '\n');

} catch (std::system_error &) {

E(error::Error::COMPILER_NO_FILE, SrcInfo(), path);

}

return lines;

}

bool ResourceFilesystem::exists(const path_t &path) const {

auto fs = cmrc::codon::get_filesystem();

if (fs.exists(path))

return true;

if (allowExternal)

return Filesystem::exists(path);

return false;

}

/// String and collection utilities

std::vector<std::string> split(const std::string &s, char delim) {

std::vector<std::string> items;

std::string item;

std::istringstream iss(s);

while (std::getline(iss, item, delim))

items.push_back(item);

return items;

}

// clang-format off

std::string escape(const std::string &str) {

std::string r;

r.reserve(str.size());

for (unsigned char c : str) {

switch (c) {

case '\a': r += "\\a"; break;

case '\b': r += "\\b"; break;

case '\f': r += "\\f"; break;

case '\n': r += "\\n"; break;

case '\r': r += "\\r"; break;

case '\t': r += "\\t"; break;

case '\v': r += "\\v"; break;

case '\'': r += "\\'"; break;

case '\\': r += "\\\\"; break;

default:

if (c < 32 || c >= 127)

r += fmt::format("\\x{:x}", c);

else

r += c;

}

return r;

}

std::string unescape(const std::string &str) {

std::string r;

r.reserve(str.size());

for (int i = 0; i < str.size(); i++) {

if (str[i] == '\\' && i + 1 < str.size())

switch(str[i + 1]) {

case 'a': r += '\a'; i++; break;

case 'b': r += '\b'; i++; break;

case 'f': r += '\f'; i++; break;

case 'n': r += '\n'; i++; break;

case 'r': r += '\r'; i++; break;

case 't': r += '\t'; i++; break;

case 'v': r += '\v'; i++; break;

case '"': r += '\"'; i++; break;

case '\'': r += '\''; i++; break;

case '\\': r += '\\'; i++; break;

case 'x': {

if (i + 3 > str.size())

throw std::invalid_argument("invalid \\x code");

size_t pos = 0;

auto code = std::stoi(str.substr(i + 2, 2), &pos, 16);

r += static_cast<char>(code);

i += pos + 1;

break;

}

default:

if (str[i + 1] >= '0' && str[i + 1] <= '7') {

size_t pos = 0;

auto code = std::stoi(str.substr(i + 1, 3), &pos, 8);

r += static_cast<char>(code);

i += pos;

} else {

r += str[i];

}

else

r += str[i];

}

return r;

}

// clang-format on

std::string escapeFStringBraces(const std::string &str, int start, int len) {

std::string t;

t.reserve(len);

for (int i = start; i < start + len; i++)

if (str[i] == '{')

t += "{{";

else if (str[i] == '}')

t += "}}";

else

t += str[i];

return t;

}

int findStar(const std::string &s) {

int i = 0;

for (; i < s.size(); i++) {

if (s[i] == '(')

return i + 1;

if (!isspace(s[i]))

return i;

}

return i;

}

bool in(const std::string &m, char item) {

auto f = m.find(item);

return f != std::string::npos;

}

bool in(const std::string &m, const std::string &item) {

auto f = m.find(item);

return f != std::string::npos;

}

size_t startswith(const std::string &str, const std::string &prefix) {

if (prefix.empty())

return true;

return (str.size() >= prefix.size() && str.substr(0, prefix.size()) == prefix)

? prefix.size()

: 0;

}

size_t endswith(const std::string &str, const std::string &suffix) {

if (suffix.empty())

return true;

return (str.size() >= suffix.size() &&

str.substr(str.size() - suffix.size()) == suffix)

? suffix.size()

: 0;

}

void ltrim(std::string &str) {

str.erase(str.begin(), std::ranges::find_if(

str, [](unsigned char ch) { return !std::isspace(ch); }));

}

void rtrim(std::string &str) {

/// https://stackoverflow.com/questions/216823/whats-the-best-way-to-trim-stdstring

str.erase(std::find_if(str.rbegin(), str.rend(),

[](unsigned char ch) { return !std::isspace(ch); })

.base(),

str.end());

}

bool isdigit(const std::string &str) { return std::ranges::all_of(str, ::isdigit); }

// Adapted from https://github.com/gpakosz/whereami/blob/master/src/whereami.c (MIT)

#ifdef __APPLE__

#include <dlfcn.h>

#include <mach-o/dyld.h>

#endif

std::string library_path() {

std::string result;

#ifdef __APPLE__

char buffer[PATH_MAX];

for (;;) {

Dl_info info;

if (dladdr(__builtin_extract_return_addr(__builtin_return_address(0)), &info)) {

char *resolved = realpath(info.dli_fname, buffer);

if (!resolved)

break;

result = std::string(resolved);

}

break;

}

#else

for (int r = 0; r < 5; r++) {

FILE *maps = fopen("/proc/self/maps", "r");

if (!maps)

break;

for (;;) {

char buffer[PATH_MAX < 1024 ? 1024 : PATH_MAX];

uint64_t low, high;

char perms[5];

uint64_t offset;

uint32_t major, minor;

char path[PATH_MAX];

uint32_t inode;

if (!fgets(buffer, sizeof(buffer), maps))

break;

if (sscanf(buffer, "%" PRIx64 "-%" PRIx64 " %s %" PRIx64 " %x:%x %u %s\n", &low,

&high, perms, &offset, &major, &minor, &inode, path) == 8) {

uint64_t addr =

(uintptr_t)(__builtin_extract_return_addr(__builtin_return_address(0)));

if (low <= addr && addr <= high) {

char *resolved = realpath(path, buffer);

if (resolved)

result = std::string(resolved);

break;

}

fclose(maps);

if (!result.empty())

break;

}

#endif

return result;

}

std::string Filesystem::get_absolute_path(const std::string &path) {

char *c = realpath(path.c_str(), nullptr);

if (!c)

return path;

std::string result(c);

free(c);

return result;

}

std::shared_ptr<ImportFile> getImportFile(Cache *cache, const std::string &what,

const std::string &relativeTo,

bool forceStdlib) {

auto fs = cache->fs.get();

std::vector<std::string> paths;

auto parentRelativeTo = IFilesystem::path_t(relativeTo).parent_path();

if (what != "<jit>") {

if (!forceStdlib) {

auto path = parentRelativeTo / what;

path.replace_extension("codon");

if (fs->exists(path))

paths.emplace_back(fs->canonical(path));

path = parentRelativeTo / what / "__init__.codon";

if (fs->exists(path))

paths.emplace_back(fs->canonical(path));

path = parentRelativeTo / what;

path.replace_extension("py");

if (fs->exists(path))

paths.emplace_back(fs->canonical(path));

path = parentRelativeTo / what / "__init__.py";

if (fs->exists(path))

paths.emplace_back(fs->canonical(path));

}

auto checkPlugin = [&paths, &fs, &cache](const std::filesystem::path &path,

const std::string &what) {

if (fs->exists(path / what / "plugin.toml") &&

fs->exists(path / what / "stdlib" / what / "__init__.codon")) {

bool failed = false;

if (cache->compiler && !cache->compiler->isPluginLoaded(path / what)) {

LOG_REALIZE("Loading plugin {}", path / what);

llvm::handleAllErrors(cache->compiler->load(path / what),

[&failed](const codon::error::PluginErrorInfo &e) {

codon::compilationError(e.getMessage(), /*file=*/"",

/*line=*/0, /*col=*/0,

/*len=*/0,

/*errorCode=*/-1,

/*terminate=*/false);

failed = true;

});

}

if (!failed)

paths.emplace_back(

fs->canonical(path / what / "stdlib" / what / "__init__.codon"));

}

};

if (paths.empty()) {

// Load a plugin maybe

checkPlugin(parentRelativeTo, what);

}

for (auto &p : fs->get_stdlib_paths()) {

auto path = p / what;

path.replace_extension("codon");

if (fs->exists(path))

paths.emplace_back(fs->canonical(path));

path = p / what / "__init__.codon";

if (fs->exists(path))

paths.emplace_back(fs->canonical(path));

// Load a plugin maybe

checkPlugin(p, what);

}

if (paths.empty())

return nullptr;

return std::make_shared<ImportFile>(fs->get_root(paths[0]));

}

std::string getMangledClass(const std::string &module, const std::string &cls,

size_t id) {

if (module == "std.internal.core")

return cls;

std::string num;

if (!in(cls, '.'))

num = "." + std::to_string(id);

return (module.empty() ? "" : (module + ".")) + cls + num;

}

std::string getMangledFunc(const std::string &module, const std::string &fn,

size_t overload, size_t id) {

if (module == "std.internal.core")

return fn + ":" + std::to_string(overload);

std::string num;

if (!in(fn, '.'))

num = "." + std::to_string(id);

return (module.empty() ? "" : (module + ".")) + fn + num + ":" +

std::to_string(overload);

}

std::string getMangledMethod(const std::string &module, const std::string &cls,

const std::string &method, size_t overload, size_t id) {

if (module == "std.internal.core")

return cls + "." + method + ":" + std::to_string(overload);

std::string num;

if (!in(cls, '.'))

num = "." + std::to_string(id);

return (module.empty() ? "" : (module + ".")) + cls + num + "." + method + ":" +

std::to_string(overload);

}

std::string getMangledVar(const std::string &module, const std::string &var,

size_t id) {

std::string num;

if (!in(var, '.'))

num = "." + std::to_string(id);

return (module.empty() ? "" : (module + ".")) + var + num;

}

} // namespace codon::ast

codon/codon/parser/common.cpp at develop · strider4560/codon · GitHub

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