libc: stdio: Add vsnprintf() and printf() impl

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

2 files changed, 14 insertions, 0 deletions

diff --git a/src/lib/libc/include/stdio.h b/src/lib/libc/include/stdio.h
index e97e07a..a90c4ad 100644
--- a/src/lib/libc/include/stdio.h
+++ b/src/lib/libc/include/stdio.h
@@ -30,6 +30,9 @@
 #ifndef _STDIO_H
 #define _STDIO_H 1
 
+#include <stdarg.h>
+#include <stddef.h>
+
 #define EOF (-1)
 
 /*
@@ -43,4 +46,14 @@
  */
 int puts(const char *s);
 
+/*
+ * Write a formatted string to a buffer
+ */
+int vsnprintf(char *s, size_t size, const char *fmt, va_list ap);
+
+/*
+ * Print a formatted string
+ */
+int printf(const char *__restrict fmt, ...);
+
 #endif  /* _!STDIO_H */
diff --git a/src/lib/libc/include/string.h b/src/lib/libc/include/string.h
index 3923a3b..1572400 100644
--- a/src/lib/libc/include/string.h
+++ b/src/lib/libc/include/string.h
@@ -31,6 +31,7 @@
 #define _STRING_H 1
 
 #include <stddef.h>
+#include <stdint.h>
 
 /*
  * Get the length of a string