enhanced the compiler to handle a string as a series of bytes in a byte array literal.

added FileAccessor>>seek:whence:

moo/README.md

@@ -38,9 +38,10 @@
 * #\pB8000000 SmallPointer(smptr) literal
 
 * #() Array. Comma as element delimiter is optional
-* #[] ByteArray. Comma as element delimiter is optional
+* #[] ByteArray. Comma as element delimiter is optional #[ 16r10, 16r20, 16r30 ] #[ "\x10\x20", "\x30" ]
 * #{} Dictionary - not supported yet
 
+
 The followings are not literals. The followings forms expressions.
 
 * ##() Array expression. Comma required to delimit elements

moo/kernel/Except.moo

@@ -539,9 +539,7 @@ extend Apex
 		// TODO: implement this properly
 		| class_name ctx |
 		class_name := if (self class == Class) { self name } else { self class name }.
-
+//System backtrace.
-		System backtrace.
-
 		NoSuchMessageException signal: (message_name & " not understood by " & class_name).
 	}
 

moo/kernel/IO.moo

@@ -3,7 +3,9 @@ class(#limited) InputOutputStud(Object) from "io"
 	var(#get) handle. // you must keep handle as the first field for consitency with the io module.
 
 	method(#primitive,#lenient) _close.
+	method(#primitive) _readBytesInto: buffer.
 	method(#primitive) _readBytesInto: buffer startingAt: offset for: count.
+	method(#primitive) _writeBytesFrom: buffer.
 	method(#primitive) _writeBytesFrom: buffer startingAt: offset for: count.
 }
 
@@ -21,10 +23,15 @@ class FileAccessor(InputOutputStud) from "io.file"
 		O_RDONLY   from "O_RDONLY",
 		O_RDWR     from "O_RDWR",
 		O_TRUNC    from "O_TRUNC",
-		O_WRONLY   from "O_WRONLY"
+		O_WRONLY   from "O_WRONLY",
+
+		SEEK_CUR   from "SEEK_CUR",
+		SEEK_END   from "SEEK_END",
+		SEEK_SET   from "SEEK_SET"
 	}
 
 	method(#primitive,#lenient) _open: path flags: flags.
+	method(#primitive) _seek: offset whence: whence.
 
 	method(#class) on: path for: flags
 	{

moo/lib/comp.c

@@ -5288,15 +5288,32 @@ static int read_byte_array_literal (moo_t* moo, int rdonly, moo_oop_t* xlit)
 
 	GET_TOKEN_GOTO (moo, oops); /* skip #[ and read the next token */
 
-	while (TOKEN_TYPE(moo) == MOO_IOTOK_INTLIT || TOKEN_TYPE(moo) == MOO_IOTOK_RADINTLIT || TOKEN_TYPE(moo) == MOO_IOTOK_CHARLIT)
+	while (TOKEN_TYPE(moo) == MOO_IOTOK_INTLIT || TOKEN_TYPE(moo) == MOO_IOTOK_RADINTLIT || TOKEN_TYPE(moo) == MOO_IOTOK_CHARLIT || TOKEN_TYPE(moo) == MOO_IOTOK_STRLIT)
 	{
 		/* TODO: check if the number is an integer */
 
+		if (TOKEN_TYPE(moo) == MOO_IOTOK_STRLIT)
+		{
+			moo_oow_t i;
+			for (i = 0; i < TOKEN_NAME_LEN(moo); i++)
+			{
+				tmp = TOKEN_NAME_PTR(moo)[i];
+				if (tmp < 0 || tmp > 0xFF)
+				{
+					moo_setsynerr (moo, MOO_SYNERR_BYTERANGE, TOKEN_LOC(moo), TOKEN_NAME(moo));
+					goto oops;
+				}
+				if (add_to_byte_array_literal_buffer(moo, tmp) <= -1) goto oops;
+			}
+		}
+		else
+		{
 			if (TOKEN_TYPE(moo) == MOO_IOTOK_CHARLIT)
 			{
 				/* accept a character literal inside a byte array literal */
 				tmp = TOKEN_NAME_PTR(moo)[0];
 			}
+			
 			else if (string_to_smooi(moo, TOKEN_NAME(moo), TOKEN_TYPE(moo) == MOO_IOTOK_RADINTLIT, &tmp) <= -1)
 			{
 				/* the token reader reads a valid token. no other errors
@@ -5316,6 +5333,8 @@ static int read_byte_array_literal (moo_t* moo, int rdonly, moo_oop_t* xlit)
 			}
 
 			if (add_to_byte_array_literal_buffer(moo, tmp) <= -1) goto oops;
+		}
+
 		GET_TOKEN_GOTO (moo, oops);
 
 		if (comma_used == -1)

moo/mod/io-file.c

@@ -111,6 +111,57 @@ oops:
 }
 
 
+static moo_pfrc_t pf_seek_file (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
+{
+	oop_io_t io;
+	moo_oop_t tmp;
+	moo_oow_t offset, whence;
+	int fd;
+	ssize_t n;
+
+	io = (oop_io_t)MOO_STACK_GETRCV(moo, nargs);
+	MOO_PF_CHECK_RCV (moo, 
+		MOO_OOP_IS_POINTER(io) && 
+		MOO_OBJ_BYTESOF(io) >= (MOO_SIZEOF(*io) - MOO_SIZEOF(moo_obj_t)) &&
+		MOO_OOP_IS_SMOOI(io->handle)
+	);
+
+	fd = MOO_OOP_TO_SMOOI(io->handle);
+	if (fd <= -1)
+	{
+		moo_seterrbfmt (moo, MOO_EINVAL, "bad IO handle - %d", fd);
+		return MOO_PF_FAILURE;
+	}
+
+	tmp = MOO_STACK_GETARG(moo, nargs, 0);
+	if (moo_inttooow(moo, tmp, &offset) <= 0)
+	{
+		moo_seterrbfmt (moo, MOO_EINVAL, "invalid offset - %O", tmp);
+		return MOO_PF_FAILURE;
+	}
+
+	tmp = MOO_STACK_GETARG(moo, nargs, 1);
+	if (moo_inttooow(moo, tmp, &whence) <= 0)
+	{
+		moo_seterrbfmt (moo, MOO_EINVAL, "invalid whence - %O", tmp);
+		return MOO_PF_FAILURE;
+	}
+
+	n = lseek(fd, offset, whence);
+	if (n <= -1)
+	{
+		moo_seterrwithsyserr (moo, 0, errno);
+		return MOO_PF_FAILURE;
+	}
+
+	/* [NOTE] on EWOULDBLOCK or EGAIN, -1 is returned  */
+	MOO_ASSERT (moo, MOO_IN_SMOOI_RANGE(n));
+
+	MOO_STACK_SETRET (moo, nargs, MOO_SMOOI_TO_OOP(n));
+	return MOO_PF_SUCCESS;
+}
+
+
 /* ------------------------------------------------------------------------ */
 
 #define C MOO_METHOD_CLASS
@@ -122,6 +173,7 @@ static moo_pfinfo_t pfinfos[] =
 {
 	{ I, "open:flags:",      { pf_open_file,     2, 2  }  },
 	{ I, "open:flags:mode:", { pf_open_file,     3, 3  }  },
+	{ I, "seek:whence:",     { pf_seek_file,     2, 2  }  }
 };
 
 static moo_pvinfo_t pvinfos[] = 
@@ -134,7 +186,11 @@ static moo_pvinfo_t pvinfos[] =
 	{ "O_RDONLY",   { MOO_PV_OOI, (const void*)O_RDONLY } },
 	{ "O_RDWR",     { MOO_PV_OOI, (const void*)O_RDWR } },
 	{ "O_TRUNC",    { MOO_PV_OOI, (const void*)O_TRUNC } },
-	{ "O_WRONLY",   { MOO_PV_OOI, (const void*)O_WRONLY } }
+	{ "O_WRONLY",   { MOO_PV_OOI, (const void*)O_WRONLY } },
+
+	{ "SEEK_CUR",   { MOO_PV_OOI, (const void*)SEEK_CUR } },
+	{ "SEEK_END",   { MOO_PV_OOI, (const void*)SEEK_SET } },
+	{ "SEEK_SET",   { MOO_PV_OOI, (const void*)SEEK_SET } }
 };
 /* ------------------------------------------------------------------------ */
 

moo/mod/io.c

@@ -176,7 +176,7 @@ static moo_pfrc_t pf_write_bytes (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
 		moo_oop_t tmp;
 
 		tmp = MOO_STACK_GETARG(moo, nargs, 1);
-		if (moo_inttooow (moo, tmp, &offset) <= 0)
+		if (moo_inttooow(moo, tmp, &offset) <= 0)
 		{
 			moo_seterrbfmt (moo, MOO_EINVAL, "invalid offset - %O", tmp);
 			return MOO_PF_FAILURE;