build: Build mlibc + add distclean target

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 0 insertions, 164 deletions

diff --git a/lib/mlibc/options/ansi/generic/environment.cpp b/lib/mlibc/options/ansi/generic/environment.cpp
deleted file mode 100644
index 5625592..0000000
--- a/lib/mlibc/options/ansi/generic/environment.cpp
+++ /dev/null
@@ -1,164 +0,0 @@
-#include <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-#include <bits/ensure.h>
-#include <mlibc/allocator.hpp>
-#include <mlibc/debug.hpp>
-
-#include <frg/string.hpp>
-#include <frg/vector.hpp>
-
-namespace {
-	char *empty_environment[] = { nullptr };
-}
-
-char **environ = empty_environment;
-
-namespace {
-
-size_t find_environ_index(frg::string_view name) {
-	for(size_t i = 0; environ[i]; i++) {
-		frg::string_view view{environ[i]};
-		size_t s = view.find_first('=');
-		if(s == size_t(-1)) {
-			mlibc::infoLogger() << "mlibc: environment string \""
-					<< frg::escape_fmt{view.data(), view.size()}
-					<< "\" does not contain an equals sign (=)" << frg::endlog;
-			continue;
-		}
-		if(view.sub_string(0, s) == name)
-			return i;
-	}
-
-	return -1;
-}
-
-// Environment vector that is mutated by putenv() and setenv().
-// Cannot be global as it is accessed during library initialization.
-frg::vector<char *, MemoryAllocator> &get_vector() {
-	static frg::vector<char *, MemoryAllocator> vector{getAllocator()};
-	return vector;
-}
-
-void update_vector() {
-	auto &vector = get_vector();
-	if(environ == vector.data())
-		return;
-
-	// If the environ variable was changed, we copy the environment.
-	// Note that we must only copy the pointers but not the strings themselves!
-	vector.clear();
-	for(size_t i = 0; environ[i]; i++)
-		vector.push(environ[i]);
-	vector.push(nullptr);
-
-	environ = vector.data();
-}
-
-void assign_variable(frg::string_view name, const char *string, bool overwrite) {
-	auto &vector = get_vector();
-	__ensure(environ == vector.data());
-
-	auto k = find_environ_index(name);
-	if(k != size_t(-1)) {
-		if(overwrite)
-			vector[k] = const_cast<char *>(string);
-	}else{
-		// Last pointer of environ must always be a null delimiter.
-		__ensure(!vector.back());
-		vector.back() = const_cast<char *>(string);
-		vector.push(nullptr);
-	}
-
-	// push() might have re-allocated the vector.
-	environ = vector.data();
-}
-
-void unassign_variable(frg::string_view name) {
-	auto &vector = get_vector();
-	__ensure(environ == vector.data());
-
-	auto k = find_environ_index(name);
-	if(k == size_t(-1))
-		return;
-
-	// Last pointer of environ must always be a null delimiter.
-	__ensure(vector.size() >= 2 && !vector.back());
-	std::swap(vector[k], vector[vector.size() - 2]);
-	vector.pop();
-	vector.back() = nullptr;
-
-	// pop() might have re-allocated the vector.
-	environ = vector.data();
-}
-
-} // anonymous namespace
-
-char *getenv(const char *name) {
-	auto k = find_environ_index(name);
-	if(k == size_t(-1))
-		return nullptr;
-
-	frg::string_view view{environ[k]};
-	size_t s = view.find_first('=');
-	__ensure(s != size_t(-1));
-	return const_cast<char *>(view.data() + s + 1);
-}
-
-namespace mlibc {
-
-int putenv(char *string) {
-	frg::string_view view{string};
-	size_t s = view.find_first('=');
-	if(s == size_t(-1))
-		__ensure(!"Environment strings need to contain an equals sign");
-
-	update_vector();
-	assign_variable(view.sub_string(0, s), string, true);
-	return 0;
-}
-
-} // namespace mlibc
-
-#if __MLIBC_POSIX_OPTION
-
-int putenv(char *string) {
-	return mlibc::putenv(string);
-}
-
-int setenv(const char *name, const char *value, int overwrite) {
-	frg::string_view view{name};
-	size_t s = view.find_first('=');
-	if(s != size_t(-1)) {
-		mlibc::infoLogger() << "mlibc: environment variable \""
-				<< frg::escape_fmt{view.data(), view.size()} << "\" contains an equals sign"
-				<< frg::endlog;
-		errno = EINVAL;
-		return -1;
-	}
-
-	// We never free strings here. TODO: Reuse them?
-	char *string;
-	__ensure(asprintf(&string, "%s=%s", name, value) > 0);
-	__ensure(string);
-
-	update_vector();
-	assign_variable(name, string, overwrite);
-	return 0;
-}
-
-int unsetenv(const char *name) {
-	update_vector();
-	unassign_variable(name);
-	return 0;
-}
-
-int clearenv(void) {
-	auto vector = get_vector();
-	vector.clear();
-	update_vector();
-	return 0;
-}
-
-#endif /* __MLIBC_POSIX_OPTION */