lib: Add mlibc

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

3 files changed, 71 insertions, 0 deletions

diff --git a/lib/mlibc/options/iconv/generic/iconv-stubs.cpp b/lib/mlibc/options/iconv/generic/iconv-stubs.cpp
new file mode 100644
index 0000000..ecaa7bf
--- /dev/null
+++ b/lib/mlibc/options/iconv/generic/iconv-stubs.cpp
@@ -0,0 +1,34 @@
+#include <iconv.h>
+#include <bits/ensure.h>
+#include <mlibc/debug.hpp>
+
+size_t iconv(iconv_t cd, char **__restrict inbuf, size_t *__restrict inbytesleft, char **__restrict outbuf, size_t *__restrict outbytesleft) {
+	(void)inbytesleft;
+	(void)outbytesleft;
+
+	mlibc::infoLogger() << "iconv() is unimplemented!" << frg::endlog;
+	if(cd == (iconv_t)1) { // UTF-8 to UTF-8
+		mlibc::infoLogger() << "iconv() from and to are the same, memcpy it is" << frg::endlog;
+		memcpy(inbuf, outbuf, sizeof(inbuf));
+		return sizeof(outbuf);
+	}
+	__ensure(!"iconv() not implemented");
+	__builtin_unreachable();
+}
+
+int iconv_close(iconv_t) {
+	return 0;
+}
+
+iconv_t iconv_open(const char *tocode, const char *fromcode) {
+	mlibc::infoLogger() << "iconv_open() is unimplemented! args: " << tocode << " and: " << fromcode << frg::endlog;
+	if(!strcmp(tocode, "UTF-8") && !strcmp(fromcode, "UTF-8")) {
+		mlibc::infoLogger() << "iconv_open() with UTF-8 on both is a no-op!" << frg::endlog;
+		iconv_t cd = (iconv_t)1;
+		return cd;
+	}
+	__ensure(!"iconv_open() not implemented");
+	__builtin_unreachable();
+}
+
+
diff --git a/lib/mlibc/options/iconv/include/iconv.h b/lib/mlibc/options/iconv/include/iconv.h
new file mode 100644
index 0000000..68c1114
--- /dev/null
+++ b/lib/mlibc/options/iconv/include/iconv.h
@@ -0,0 +1,25 @@
+#ifndef _ICONV_H
+#define _ICONV_H
+
+#include <bits/size_t.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void *iconv_t;
+
+#ifndef __MLIBC_ABI_ONLY
+
+size_t iconv(iconv_t, char **__restrict, size_t *__restrict, char **__restrict, size_t *__restrict);
+int iconv_close(iconv_t);
+iconv_t iconv_open(const char *, const char *);
+
+#endif /* !__MLIBC_ABI_ONLY */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/lib/mlibc/options/iconv/meson.build b/lib/mlibc/options/iconv/meson.build
new file mode 100644
index 0000000..079d868
--- /dev/null
+++ b/lib/mlibc/options/iconv/meson.build
@@ -0,0 +1,12 @@
+if disable_iconv_option
+	subdir_done()
+endif
+libc_sources += files(
+	'generic/iconv-stubs.cpp',
+)
+
+if not no_headers
+	install_headers(
+		'include/iconv.h',
+	)
+endif