From b9038b1c6b31a8f8d6b8b648cee0cf3b457dc24c Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Thu, 15 Dec 2022 22:46:25 +0100
Subject: first version of io and wstdf

---
 lib/io/Makefile |   3 +++
 lib/io/io.c     |  50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 lib/io/io.h     |  17 +++++++++++++++++
 lib/io/test     | Bin 0 -> 20240 bytes
 4 files changed, 70 insertions(+)
 create mode 100644 lib/io/Makefile
 create mode 100644 lib/io/io.c
 create mode 100644 lib/io/io.h
 create mode 100755 lib/io/test

(limited to 'lib/io')

diff --git a/lib/io/Makefile b/lib/io/Makefile
new file mode 100644
index 0000000..e60a656
--- /dev/null
+++ b/lib/io/Makefile
@@ -0,0 +1,3 @@
+unit_test:
+	gcc io.c ../cstr/cstr.c ../sys/start.S -o test -static -nostdlib -fno-stack-protector -Wno-implicit-function-declaration -g
+	./test
diff --git a/lib/io/io.c b/lib/io/io.c
new file mode 100644
index 0000000..41cd3e0
--- /dev/null
+++ b/lib/io/io.c
@@ -0,0 +1,50 @@
+#include "io.h"
+
+#include "../cstr/cstr.h"
+
+void __wstdn(const char *buf, u64 n)
+{
+	write(STDOUT_FD, buf, n);
+}
+
+
+void wstd(const char *buf)
+{
+	__wstdn(buf, cstr_length(buf));
+}
+
+
+void rstd(char *buf, unsigned long count)
+{
+	read(STDIN_FD, buf, count);
+}
+
+void wstdf__(const char *buf, void **args)
+{
+	const char *start = buf;
+	for (; *buf; ++buf) {
+		if (*buf == '%') {
+			if (buf - start > 0)
+				__wstdn(start, buf - start);
+			
+			++buf;
+
+			switch (*buf) {
+				case '%': __wstdn("%", 1); break;
+				case 's':
+					__wstdn(((const char **)args)[0], cstr_length(((const char**)args)[0]));
+					++args; break;
+			}
+
+			start = buf + 1;
+		}
+	}
+
+	if (buf - start > 0)
+		__wstdn(start, buf - start);
+}
+
+int main() {
+	void *args[] = { "hallo", "welt" };
+	wstdf__("%s %s\n", args);
+}
diff --git a/lib/io/io.h b/lib/io/io.h
new file mode 100644
index 0000000..b68a75d
--- /dev/null
+++ b/lib/io/io.h
@@ -0,0 +1,17 @@
+#ifndef IO_H
+#define IO_H
+
+#include "../sys/io.h"
+
+void wstd(const char *buf);
+void rstd(char *buf, unsigned long count);
+
+void wstdf__(const char *buf, void **args);
+
+#define wstdf(buf, ...) { \
+	void *__wstdf__args__[] = { __VA_ARGS__ }; \
+	wstdf__(buf, __wstdf__args__); \
+}
+
+
+#endif
diff --git a/lib/io/test b/lib/io/test
new file mode 100755
index 0000000..560b047
Binary files /dev/null and b/lib/io/test differ
-- 
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