1 files changed, 45 insertions, 6 deletions
diff --git a/miniany/libc-freestanding.c b/miniany/libc-freestanding.c
index 8b1a378..ffed093 100644
--- a/miniany/libc-freestanding.c
+++ b/miniany/libc-freestanding.c
@@ -20,6 +20,40 @@ int strlen( char *s )
 	return p - s;
 }
 
+int strcmp( char *s1, char *s2 )
+{
+	while( ( *s1 != '\0' ) && ( *s2 != '\0' ) && *s1 == *s2 ) {
+		s1++;
+		s2++;
+	}
+
+	return *s1 - *s2;
+}
+
+int isspace( int c )
+{
+	if( c == ' ' || c == '\r' || c == '\n' || c == '\t' ) return 1;
+	return 0;
+}
+
+int isdigit( int c )
+{
+	if( c >= '0' && c <= '9' ) return 1;
+	return 0;
+}
+
+int isalpha( int c )
+{
+	if( ( c >= 'a' && c <= 'z' ) || ( c >= 'A' && c <= 'Z' ) ) return 1;
+	return 0;
+}
+
+int isalnum( int c )
+{
+	if( isalpha( c ) || isdigit( c ) ) return 1;
+	return 0;
+}
+
 enum {
 	EXIT_SUCCESS = 0,
 	EXIT_FAILURE = 1
@@ -31,9 +65,18 @@ enum {
 	SYSCALL_WRITE = 4
 };
 
+/* EOF = -1 is a const expression for c4 */
+/* EOF = 0xFFFFFFFF clang doesn't like this */
+/* EOF = 0xFFFFFFFF gcc overflow in conversion from 'enum <anonymous>' to 'int' changes value from '4294967295' to '-1' */
+/* EOF = 256, this is not standard, but doesn't really matter in freestanding mode,
+ * code should really not relly on the fact what the value of EOF is (-1 usually) */
+enum {
+	EOF = 256
+};
+
 int errno;
 
-static __attribute__((noinline)) int syscall1( int id, int arg0 )
+int syscall1( int id, int arg0 )
 {
 	int retval;
    
@@ -54,7 +97,7 @@ static __attribute__((noinline)) int syscall1( int id, int arg0 )
 	return retval;
 }
 
-static __attribute__((noinline)) int syscall3( int id, int arg0, int arg1, int arg2 )
+int syscall3( int id, int arg0, int arg1, int arg2 )
 {
 	int retval;
    
@@ -109,10 +152,6 @@ static int read_string( int fd, char *buf, int size )
 	return syscall3( SYSCALL_READ, fd, (int)buf, size );
 }
 
-enum {
-	EOF = -1
-};
-
 int puts( char *s )
 {
 	print_string( s );