From 76f53b40f4f80fc692f90d3397516ae96872d966 Mon Sep 17 00:00:00 2001
From: Andreas Kling <awesomekling@gmail.com>
Date: Fri, 1 Feb 2019 16:03:21 +0100
Subject: [PATCH] LibC: Add some things needed to build GNU bc.

This patch adds vprintf(), sig_atomic_t, random() and strdup().
bc doesn't build yet, but it will.
---
 LibC/signal.h   |  1 +
 LibC/stdio.cpp  |  7 ++++++-
 LibC/stdio.h    |  1 +
 LibC/stdlib.cpp | 10 ++++++++++
 LibC/stdlib.h   |  3 +++
 LibC/string.cpp |  9 +++++++++
 6 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/LibC/signal.h b/LibC/signal.h
index cb3b7599af..f13cf62c27 100644
--- a/LibC/signal.h
+++ b/LibC/signal.h
@@ -10,6 +10,7 @@ typedef __sighandler_t sighandler_t;
 
 typedef uint32_t sigset_t;
 typedef void siginfo_t;
+typedef uint32_t sig_atomic_t;
 
 struct sigaction {
     union {
diff --git a/LibC/stdio.cpp b/LibC/stdio.cpp
index 378036ff2b..5153983047 100644
--- a/LibC/stdio.cpp
+++ b/LibC/stdio.cpp
@@ -268,11 +268,16 @@ int fprintf(FILE* stream, const char* fmt, ...)
     return ret;
 }
 
+int vprintf(const char* fmt, va_list ap)
+{
+    return printf_internal(stdout_putch, nullptr, fmt, ap);
+}
+
 int printf(const char* fmt, ...)
 {
     va_list ap;
     va_start(ap, fmt);
-    int ret = printf_internal(stdout_putch, nullptr, fmt, ap);
+    int ret = vprintf(fmt, ap);
     va_end(ap);
     return ret;
 }
diff --git a/LibC/stdio.h b/LibC/stdio.h
index f9c5ca0611..b52b0f5680 100644
--- a/LibC/stdio.h
+++ b/LibC/stdio.h
@@ -50,6 +50,7 @@ int feof(FILE*);
 int fflush(FILE*);
 size_t fread(void* ptr, size_t size, size_t nmemb, FILE*);
 size_t fwrite(const void* ptr, size_t size, size_t nmemb, FILE*);
+int vprintf(const char* fmt, va_list);
 int vfprintf(FILE*, const char* fmt, va_list);
 int vsprintf(char* buffer, const char* fmt, va_list);
 int vsnprintf(char* buffer, size_t, const char* fmt, va_list);
diff --git a/LibC/stdlib.cpp b/LibC/stdlib.cpp
index 671f6517cc..b5a179ac98 100644
--- a/LibC/stdlib.cpp
+++ b/LibC/stdlib.cpp
@@ -252,4 +252,14 @@ int abs(int i)
     return i < 0 ? -i : i;
 }
 
+long int random()
+{
+    return rand();
+}
+
+void srandom(unsigned seed)
+{
+    srand(seed);
+}
+
 }
diff --git a/LibC/stdlib.h b/LibC/stdlib.h
index 7af51814ae..028e9d4a91 100644
--- a/LibC/stdlib.h
+++ b/LibC/stdlib.h
@@ -26,5 +26,8 @@ int abs(int);
 int rand();
 void srand(unsigned seed);
 
+long int random();
+void srandom(unsigned seed);
+
 __END_DECLS
 
diff --git a/LibC/string.cpp b/LibC/string.cpp
index 6923a17a4c..c5284fa936 100644
--- a/LibC/string.cpp
+++ b/LibC/string.cpp
@@ -3,6 +3,7 @@
 #include <stdio.h>
 #include <signal.h>
 #include <assert.h>
+#include <stdlib.h>
 #include <AK/Types.h>
 
 extern "C" {
@@ -51,6 +52,14 @@ size_t strlen(const char* str)
     return len;
 }
 
+char* strdup(const char* str)
+{
+    size_t len = strlen(str);
+    char* new_str = (char*)malloc(len);
+    strcpy(new_str, str);
+    return new_str;
+}
+
 int strcmp(const char* s1, const char* s2)
 {
     while (*s1 == *s2++)