initial checkin

1 files changed, 81 insertions, 0 deletions

diff --git a/minilib/io.c b/minilib/io.c
new file mode 100644
index 0000000..006f5df
--- /dev/null
+++ b/minilib/io.c
@@ -0,0 +1,81 @@
+#include "io.h"
+#include "minilib.h"
+#include "arena.h"
+#include "string.h"
+
+/* TODO: this is the Linux hosted environment */
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <sys/syscall.h>
+
+#include <stdio.h>
+
+void print( char *s )
+{
+	syscall( __NR_write, STDOUT_FILENO, s, strlen( s ) );
+	syscall( __NR_write, STDOUT_FILENO, "\n", 1 );
+}
+
+int readfile( char *filename, char *s, int size )
+{
+	/* TODO: this is host-only */
+	FILE *f = fopen( filename, "rb" );
+	
+	if( !f ) {
+		return -1;
+	}
+	
+	fread( s, size, 1, f );
+	
+	fclose( f );
+	
+	return 0;
+}
+
+int writefile( char *filename, char *s, int size )
+{
+	/* TODO: this is host-only */
+	FILE *f = fopen( filename, "wb" );
+	
+	if( !f ) {
+		return -1;
+	}
+	
+	fwrite( s, size, 1, f );
+	
+	fclose( f );
+	
+	return 0;
+}
+
+char *readallfile( char *filename )
+{
+	/* TODO: this is host-only */
+	FILE *f = fopen( filename, "rb" );
+	int size;
+	char *buf;
+	
+	if( !f ) {
+		return NULL;
+	}
+	
+	fseek( f, 0, SEEK_END );
+	size = ftell( f );
+	rewind( f );
+	
+	if( size == 0 ) {
+		return NULL;
+	}
+	
+	buf = allocate( size + 1 );
+	
+	if( fread( buf, size, 1, f ) != 1 ) {
+		return NULL;
+	}
+	
+	buf[size] = '\0';
+	
+	fclose( f );
+	
+	return buf;
+}