Import sources from 2011-03-30 iso image

1 files changed, 80 insertions, 0 deletions

diff --git a/sys/src/cmd/aux/flashfs/utils.c b/sys/src/cmd/aux/flashfs/utils.c
new file mode 100755
index 000000000..965bd5218
--- /dev/null
+++ b/sys/src/cmd/aux/flashfs/utils.c
@@ -0,0 +1,80 @@
+#include <u.h>
+#include <libc.h>
+#include "flashfs.h"
+
+char*	prog;
+ulong	sectsize;
+ulong	nsects;
+uchar*	sectbuff;
+int	readonly;
+ulong	delta;
+int	eparity;
+
+uchar	magic[]	= { MAGIC0, MAGIC1, MAGIC2, FFSVERS };
+
+int
+putc3(uchar *buff, ulong v)
+{
+	if(v < (1 << 7)) {
+		buff[0] = v;
+		return 1;
+	}
+
+	if(v < (1 << 13)) {
+		buff[0] = 0x80 | (v >> 7);
+		buff[1] = v & ((1 << 7) - 1);
+		return 2;
+	}
+
+	if(v < (1 << 21)) {
+		buff[0] = 0x80 | (v >> 15);
+		buff[1] = 0x80 | ((v >> 8) & ((1 << 7) - 1));
+		buff[2] = v;
+		return 3;
+	}
+
+	fprint(2, "%s: putc3 fail 0x%lux, called from %#p\n", prog, v, getcallerpc(&buff));
+	abort();
+	return -1;
+}
+
+int
+getc3(uchar *buff, ulong *p)
+{
+	int c, d;
+
+	c = buff[0];
+	if((c & 0x80) == 0) {
+		*p = c;
+		return 1;
+	}
+
+	c &= ~0x80;
+	d = buff[1];
+	if((d & 0x80) == 0) {
+		*p = (c << 7) | d;
+		return 2;
+	}
+
+	d &= ~0x80;
+	*p = (c << 15) | (d << 8) | buff[2];
+	return 3;
+}
+
+ulong
+get4(uchar *b)
+{
+	return	(b[0] <<  0) |
+		(b[1] <<  8) |
+		(b[2] << 16) |
+		(b[3] << 24);
+}
+
+void
+put4(uchar *b, ulong v)
+{
+	b[0] = v >>  0;
+	b[1] = v >>  8;
+	b[2] = v >> 16;
+	b[3] = v >> 24;
+}