From c03738a9f3b3f5d3b145f9c3152eb5057e5665a8 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Mon, 5 Mar 2012 16:01:43 +0100
Subject: [PATCH] Added a stub for sscanf(3).

This stub implements an ugly hack to help port binutils.

Hopefully we'll get a real scanf family of functions soon.
---
 libmaxsi/include/stdio.h |  2 +-
 libmaxsi/io.cpp          | 17 +++++++++++++++++
 2 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/libmaxsi/include/stdio.h b/libmaxsi/include/stdio.h
index c5c57803..e6ce005d 100644
--- a/libmaxsi/include/stdio.h
+++ b/libmaxsi/include/stdio.h
@@ -102,6 +102,7 @@ extern int snprintf(char* restrict s, size_t n, const char* restrict format, ...
 extern char* sortix_gets(void);
 extern int sortix_puts(const char* str);
 extern int sprintf(char* restrict s, const char* restrict format, ...);
+extern int sscanf(const char* restrict s, const char* restrict format, ...);
 extern int vfprintf(FILE* restrict stream, const char* restrict format, va_list ap);
 extern int vprintf(const char* restrict format, va_list ap);
 extern int vsnprintf(char* restrict, size_t, const char* restrict, va_list);
@@ -131,7 +132,6 @@ extern int rename(const char* oldname, const char* newname);
 extern int renameat(int oldfd, const char* oldname, int newfd, const char* newname);
 extern int scanf(const char* restrict format, ...);
 extern int setvbuf(FILE* restrict stream, char* restrict buf, int type, size_t size);
-extern int sscanf(const char* restrict s, const char* restrict format, ...);
 extern int ungetc(int c, FILE* stream);
 extern int vdprintf(int fildes, const char* restrict format, va_list ap);
 extern int vfscanf(FILE* restrict stream, const char* restrict format, va_list arg);
diff --git a/libmaxsi/io.cpp b/libmaxsi/io.cpp
index 5b16d5c5..217196a5 100644
--- a/libmaxsi/io.cpp
+++ b/libmaxsi/io.cpp
@@ -119,6 +119,23 @@ namespace Maxsi
 		return (int) result;
 	}
 
+	// TODO: This is an ugly hack to help build binutils.
+	#warning Ugly sscanf hack to help build binutils
+	extern int sscanf(const char* s, const char* format, ...)
+	{
+		if ( strcmp(format, "%x") != 0 )
+		{
+			fprintf(stderr, "sscanf hack doesn't implement: '%s'\n", format);
+			abort();
+		}
+
+		va_list list;
+		va_start(list, format);
+		unsigned* dec = va_arg(list, unsigned*);
+		*dec = strtol(s, NULL, 16);
+		return strlen(s);
+	}
+
 	typedef struct vsnprintf_struct
 	{
 		char* str;