added missing files again

2010-08-28 05:49:57 +00:00 · 2010-08-28 05:49:57 +00:00 · 80fcdc3162
commit 80fcdc3162
parent d012ea1b01
7 changed files with 1672 additions and 0 deletions
--- a/qse/lib/scm/Makefile.am
+++ b/qse/lib/scm/Makefile.am
@ -0,0 +1,10 @@
+
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+libqsescm_la_LIBADD = -lqsecmn
--- a/qse/lib/scm/Makefile.in
+++ b/qse/lib/scm/Makefile.in
@ -0,0 +1,551 @@
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+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libLTLIBRARIES
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libLTLIBRARIES clean-libtool ctags distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am \
+	install-libLTLIBRARIES install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags uninstall uninstall-am uninstall-libLTLIBRARIES
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
--- a/qse/lib/scm/err.c
+++ b/qse/lib/scm/err.c
@ -0,0 +1,128 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2009 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "scm.h"
+
+const qse_char_t* qse_scm_dflerrstr (qse_scm_t* scm, qse_scm_errnum_t errnum)
+{
+	static const qse_char_t* errstr[] = 
+	{
+		QSE_T("no error"),
+		QSE_T("out of memory"),
+
+		QSE_T("exit"),
+		QSE_T("end of source"),
+
+		QSE_T("I/O error"),
+		QSE_T("unexpected end of string"),
+
+		QSE_T("internal error"),
+		QSE_T("syntax"),
+		QSE_T("list too deep"),
+		QSE_T("right parenthesis expected"),
+		QSE_T("bad arguments"),
+		QSE_T("too few arguments"),
+		QSE_T("too many arguments"),
+		QSE_T("undefined function '${0}'"),
+		QSE_T("bad function"),
+		QSE_T("duplicate formal"),
+		QSE_T("bad symbol"),
+		QSE_T("undefined symbol '${0}'"),
+		QSE_T("empty body"),
+		QSE_T("bad value"),
+		QSE_T("divide by zero")
+	};
+
+	return (errnum >= 0 && errnum < QSE_COUNTOF(errstr))?
+		errstr[errnum]: QSE_T("unknown error");
+}
+
+qse_scm_errstr_t qse_scm_geterrstr (qse_scm_t* scm)
+{
+	return scm->err.str;
+}
+
+void qse_scm_seterrstr (qse_scm_t* scm, qse_scm_errstr_t errstr)
+{
+	scm->err.str = errstr;
+}
+
+qse_scm_errnum_t qse_scm_geterrnum (qse_scm_t* scm)
+{
+	return scm->err.num;
+}
+
+const qse_scm_loc_t* qse_scm_geterrloc (qse_scm_t* scm)
+{
+	return &scm->err.loc;
+}
+
+const qse_char_t* qse_scm_geterrmsg (qse_scm_t* scm)
+{
+	return (scm->err.msg[0] == QSE_T('\0'))?
+		qse_scm_geterrstr(scm)(scm,scm->err.num): scm->err.msg;
+}
+
+void qse_scm_geterror (
+	qse_scm_t* scm, qse_scm_errnum_t* errnum, 
+	const qse_char_t** errmsg, qse_scm_loc_t* errloc)
+{
+	if (errnum != QSE_NULL) *errnum = scm->err.num;
+	if (errmsg != QSE_NULL) 
+	{
+		*errmsg = (scm->err.msg[0] == QSE_T('\0'))?
+			qse_scm_geterrstr(scm)(scm,scm->err.num):
+			scm->err.msg;
+	}
+	if (errloc != QSE_NULL) *errloc = scm->err.loc;
+}
+
+void qse_scm_seterrnum (
+	qse_scm_t* scm, qse_scm_errnum_t errnum, const qse_cstr_t* errarg)
+{
+	qse_scm_seterror (scm, errnum, errarg, QSE_NULL);
+}
+
+void qse_scm_seterrmsg (
+	qse_scm_t* scm, qse_scm_errnum_t errnum,
+	const qse_char_t* errmsg, const qse_scm_loc_t* errloc)
+{
+	scm->err.num = errnum;
+	qse_strxcpy (scm->err.msg, QSE_COUNTOF(scm->err.msg), errmsg);
+	if (errloc != QSE_NULL) scm->err.loc = *errloc;
+	else QSE_MEMSET (&scm->err.loc, 0, QSE_SIZEOF(scm->err.loc));
+}
+
+void qse_scm_seterror (
+	qse_scm_t* scm, qse_scm_errnum_t errnum,
+	const qse_cstr_t* errarg, const qse_scm_loc_t* errloc)
+{
+	const qse_char_t* errfmt;
+
+	scm->err.num = errnum;
+
+	errfmt = qse_scm_geterrstr(scm)(scm,scm->err.num);
+	QSE_ASSERT (errfmt != QSE_NULL);
+	qse_strxfncpy (scm->err.msg, QSE_COUNTOF(scm->err.msg), errfmt, errarg);
+
+	if (errloc != QSE_NULL) scm->err.loc = *errloc;
+	else QSE_MEMSET (&scm->err.loc, 0, QSE_SIZEOF(scm->err.loc));
+}
+
--- a/qse/lib/scm/mem.c
+++ b/qse/lib/scm/mem.c
@ -0,0 +1,600 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2009 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "scm.h"
+
+static qse_scm_obj_t* makeint (qse_scm_mem_t* mem, qse_long_t value);
+static QSE_INLINE_ALWAYS void collect_garbage (qse_scm_mem_t* mem);
+static void dispose_all (qse_scm_mem_t* mem);
+
+qse_scm_mem_t* qse_scm_initmem (
+	qse_scm_mem_t* mem, qse_scm_t* scm,
+	qse_size_t ubound, qse_size_t ubound_inc)
+{
+	qse_size_t i;
+	int fail = 0;
+
+	QSE_MEMSET (mem, 0, QSE_SIZEOF(qse_scm_mem_t));
+	mem->scm = scm;
+
+	/* create a new root environment frame */
+	mem->frame = qse_scm_newframe (scm);
+	if (mem->frame == QSE_NULL) return QSE_NULL;
+
+	mem->root_frame     = mem->frame;
+	mem->brooding_frame = QSE_NULL;
+	mem->tlink          = QSE_NULL;
+	mem->tlink_count    = 0;
+
+	/* initialize object allocation list */
+	mem->ubound     = ubound;
+	mem->ubound_inc = ubound_inc;
+	mem->count      = 0;
+	for (i = 0; i < QSE_SCM_TYPE_COUNT; i++) 
+	{
+		mem->used[i] = QSE_NULL;
+		mem->free[i] = QSE_NULL;
+	}
+
+	/* initialize read registers */
+	mem->r.obj = QSE_NULL;
+	mem->r.tmp = QSE_NULL;
+	mem->r.stack = QSE_NULL;
+
+	/* when "ubound" is too small, the garbage collection can
+	 * be performed while making the common objects. */
+	mem->nil    = QSE_NULL;
+	mem->t      = QSE_NULL;
+	mem->quote  = QSE_NULL;
+	mem->lambda = QSE_NULL;
+	mem->macro  = QSE_NULL;
+	for (i = 0; i < QSE_COUNTOF(mem->num); i++) mem->num[i] = QSE_NULL;
+
+	/* initialize common object pointers */
+	mem->nil = qse_scm_makenil (mem);
+	mem->t = qse_scm_maketrue (mem);
+	mem->quote = qse_scm_makesym (mem, QSE_T("quote"), 5);
+	mem->lambda = qse_scm_makesym (mem, QSE_T("lambda"), 6);
+	mem->macro = qse_scm_makesym (mem, QSE_T("macro"), 5);
+
+	if (mem->nil == QSE_NULL ||
+	    mem->t == QSE_NULL ||
+	    mem->quote == QSE_NULL ||
+	    mem->lambda == QSE_NULL ||
+	    mem->macro == QSE_NULL) 
+	{
+		fail = 1;
+	}
+	else
+	{
+		for (i = 0; i < QSE_COUNTOF(mem->num); i++)
+		{
+			mem->num[i] = makeint (mem, i);
+			if (mem->num[i] == QSE_NULL) { fail = 1; break; }
+		}
+	}
+
+	if (fail)
+	{
+		dispose_all (mem);
+		qse_scm_freeframe (scm, mem->frame);
+		return QSE_NULL;
+	}
+
+	QSE_SCM_PERM(mem->nil)    = 1;
+	QSE_SCM_PERM(mem->t)      = 1;
+	QSE_SCM_PERM(mem->quote)  = 1;
+	QSE_SCM_PERM(mem->lambda) = 1;
+	QSE_SCM_PERM(mem->macro)  = 1;
+	for (i = 0; i < QSE_COUNTOF(mem->num); i++)
+	{
+		QSE_SCM_PERM(mem->num[i]) = 1;
+	}
+
+	/* let the read stack point to nil */
+	mem->r.stack = mem->nil;
+
+	return mem;
+}
+
+void qse_scm_finimem (qse_scm_mem_t* mem)
+{
+	/* dispose of the allocated objects */
+	dispose_all (mem);
+
+	/* dispose of environment frames */
+	qse_scm_freeframe (mem->scm, mem->frame);
+}
+
+static qse_scm_obj_t* allocate (qse_scm_mem_t* mem, int type, qse_size_t size)
+{
+	qse_scm_obj_t* obj;
+	
+	if (mem->count >= mem->ubound) collect_garbage (mem);
+	if (mem->count >= mem->ubound) 
+	{
+		mem->ubound += mem->ubound_inc;
+		if (mem->count >= mem->ubound) return QSE_NULL;
+	}
+
+	obj = (qse_scm_obj_t*) QSE_SCM_ALLOC (mem->scm, size);
+	if (obj == QSE_NULL) 
+	{
+		collect_garbage (mem);
+
+		obj = (qse_scm_obj_t*) QSE_SCM_ALLOC (mem->scm, size);
+		if (obj == QSE_NULL) 
+		{
+			qse_scm_seterror (mem->scm, QSE_SCM_ENOMEM, QSE_NULL, 0);
+			return QSE_NULL;
+		}
+	}
+
+	QSE_SCM_TYPE(obj) = type;
+	QSE_SCM_SIZE(obj) = size;
+	QSE_SCM_MARK(obj) = 0;
+	QSE_SCM_PERM(obj) = 0;
+
+	/* insert the object at the head of the used list */
+	QSE_SCM_LINK(obj) = mem->used[type];
+	mem->used[type] = obj;
+	mem->count++;
+
+#if 0
+	qse_dprint1 (QSE_T("mem->count: %u\n"), mem->count);
+#endif
+
+	return obj;
+}
+
+static void dispose (
+	qse_scm_mem_t* mem, qse_scm_obj_t* prev, qse_scm_obj_t* obj)
+{
+	QSE_ASSERT (obj != QSE_NULL);
+	QSE_ASSERT (mem->count > 0);
+
+	/* TODO: push the object to the free list for more 
+	 *       efficient memory management */
+
+	if (prev == QSE_NULL) 
+		mem->used[QSE_SCM_TYPE(obj)] = QSE_SCM_LINK(obj);
+	else QSE_SCM_LINK(prev) = QSE_SCM_LINK(obj);
+
+	mem->count--;
+#if 0
+	qse_dprint1 (QSE_T("mem->count: %u\n"), mem->count);
+#endif
+
+	QSE_SCM_FREE (mem->scm, obj);	
+}
+
+static void dispose_all (qse_scm_mem_t* mem)
+{
+	qse_scm_obj_t* obj, * next;
+	qse_size_t i;
+
+	for (i = 0; i < QSE_SCM_TYPE_COUNT; i++) 
+	{
+		obj = mem->used[i];
+
+		while (obj != QSE_NULL) 
+		{
+			next = QSE_SCM_LINK(obj);
+			dispose (mem, QSE_NULL, obj);
+			obj = next;
+		}
+	}
+}
+
+static void mark_obj (qse_scm_mem_t* mem, qse_scm_obj_t* obj)
+{
+	QSE_ASSERT (obj != QSE_NULL);
+
+	/* TODO: can it be non-recursive? */
+	if (QSE_SCM_MARK(obj) != 0) return;
+
+	QSE_SCM_MARK(obj) = 1;
+
+	if (QSE_SCM_TYPE(obj) == QSE_SCM_OBJ_CONS) 
+	{
+		mark_obj (mem, QSE_SCM_CAR(obj));
+		mark_obj (mem, QSE_SCM_CDR(obj));
+	}
+	else if (QSE_SCM_TYPE(obj) == QSE_SCM_OBJ_FUNC) 
+	{
+		mark_obj (mem, QSE_SCM_FFORMAL(obj));
+		mark_obj (mem, QSE_SCM_FBODY(obj));
+	}
+	else if (QSE_SCM_TYPE(obj) == QSE_SCM_OBJ_MACRO) 
+	{
+		mark_obj (mem, QSE_SCM_MFORMAL(obj));
+		mark_obj (mem, QSE_SCM_MBODY(obj));
+	}
+}
+
+static void mark_objs_in_use (qse_scm_mem_t* mem)
+{
+	qse_scm_frame_t* frame;
+	qse_scm_assoc_t* assoc;
+	qse_scm_tlink_t* tlink;
+	/*qse_scm_arr_t* arr;*/
+	qse_size_t       i;
+
+#if 0
+	qse_dprint0 (QSE_T("marking environment frames\n"));
+#endif
+	/* mark objects in the environment frames */
+	frame = mem->frame;
+	while (frame != QSE_NULL) 
+	{
+		assoc = frame->assoc;
+		while (assoc != QSE_NULL) 
+		{
+			mark_obj (mem, assoc->name);
+
+			if (assoc->value != QSE_NULL) 
+				mark_obj (mem, assoc->value);
+			if (assoc->func != QSE_NULL) 
+				mark_obj (mem, assoc->func);
+
+			assoc = assoc->link;
+		}
+
+		frame = frame->link;
+	}
+
+#if 0
+	qse_dprint0 (QSE_T("marking interim frames\n"));
+#endif
+
+	/* mark objects in the interim frames */
+	frame = mem->brooding_frame;
+	while (frame != QSE_NULL) 
+	{
+		assoc = frame->assoc;
+		while (assoc != QSE_NULL) 
+		{
+			mark_obj (mem, assoc->name);
+
+			if (assoc->value != QSE_NULL) 
+				mark_obj (mem, assoc->value);
+			if (assoc->func != QSE_NULL) 
+				mark_obj (mem, assoc->func);
+
+			assoc = assoc->link;
+		}
+
+		frame = frame->link;
+	}
+
+	/*qse_dprint0 (QSE_T("marking the read object\n"));*/
+	if (mem->r.obj) mark_obj (mem, mem->r.obj);
+	if (mem->r.tmp) mark_obj (mem, mem->r.tmp);
+	if (mem->r.stack) mark_obj (mem, mem->r.stack);
+
+	/* qse_dprint0 (QSE_T("marking the temporary objects\n"));*/
+	for (tlink = mem->tlink; tlink != QSE_NULL; tlink = tlink->link)
+	{
+		mark_obj (mem, tlink->obj);
+	}
+
+#if 0
+	qse_dprint0 (QSE_T("marking builtin objects\n"));
+#endif
+	/* mark common objects */
+	if (mem->t) mark_obj (mem, mem->t);
+	if (mem->nil) mark_obj (mem, mem->nil);
+	if (mem->quote) mark_obj (mem, mem->quote);
+	if (mem->lambda) mark_obj (mem, mem->lambda);
+	if (mem->macro) mark_obj (mem, mem->macro);
+
+	for (i = 0; i < QSE_COUNTOF(mem->num); i++) 
+	{
+		if (mem->num[i]) mark_obj (mem, mem->num[i]);
+	}
+}
+
+//#include <qse/cmn/stdio.h>
+static void sweep_unmarked_objs (qse_scm_mem_t* mem)
+{
+	qse_scm_obj_t* obj, * prev, * next;
+	qse_size_t i;
+
+	/* scan all the allocated objects and get rid of unused objects */
+	for (i = 0; i < QSE_SCM_TYPE_COUNT; i++) 
+	{
+		prev = QSE_NULL;
+		obj = mem->used[i];
+
+#if 0
+		qse_dprint1 (QSE_T("sweeping objects of type: %u\n"), i);
+#endif
+		while (obj != QSE_NULL) 
+		{
+			next = QSE_SCM_LINK(obj);
+
+			if (QSE_SCM_MARK(obj) == 0 && 
+			    QSE_SCM_PERM(obj) == 0) 
+			{
+				/* dispose of unused objects */
+/*
+if (i == QSE_SCM_OBJ_INT)
+qse_printf (QSE_T("disposing....%d [%d]\n"), i, (int)QSE_SCM_IVAL(obj));
+if (i == QSE_SCM_OBJ_REAL)
+qse_printf (QSE_T("disposing....%d [%Lf]\n"), i, (double)QSE_SCM_RVAL(obj));
+else if (i == QSE_SCM_OBJ_SYM)
+qse_printf (QSE_T("disposing....%d [%s]\n"), i, QSE_SCM_SYMPTR(obj));
+else if (i == QSE_SCM_OBJ_STR)
+qse_printf (QSE_T("disposing....%d [%s]\n"), i, QSE_SCM_STRPTR(obj));
+else
+qse_printf (QSE_T("disposing....%d\n"), i);
+*/
+				dispose (mem, prev, obj);
+			}
+			else 
+			{
+				/* unmark the object in use */
+				QSE_SCM_MARK(obj) = 0; 
+				prev = obj;
+			}
+
+			obj = next;
+		}
+	}
+}
+
+static QSE_INLINE_ALWAYS void collect_garbage (qse_scm_mem_t* mem)
+{
+	mark_objs_in_use (mem);
+	sweep_unmarked_objs (mem);
+}
+
+void qse_scm_gc (qse_scm_t* scm)
+{
+	collect_garbage (&scm->mem);
+}
+
+qse_scm_obj_t* qse_scm_makenil (qse_scm_mem_t* mem)
+{
+	if (mem->nil != QSE_NULL) return mem->nil;
+	mem->nil = allocate (
+		mem, QSE_SCM_OBJ_NIL, QSE_SIZEOF(qse_scm_obj_nil_t));
+	return mem->nil;
+}
+
+qse_scm_obj_t* qse_scm_maketrue (qse_scm_mem_t* mem)
+{
+	if (mem->t != QSE_NULL) return mem->t;
+	mem->t = allocate (
+		mem, QSE_SCM_OBJ_TRUE, QSE_SIZEOF(qse_scm_obj_true_t));
+	return mem->t;
+}
+
+static qse_scm_obj_t* makeint (qse_scm_mem_t* mem, qse_long_t value)
+{
+	qse_scm_obj_t* obj;
+
+	obj = allocate (mem, 
+		QSE_SCM_OBJ_INT, QSE_SIZEOF(qse_scm_obj_int_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+
+	QSE_SCM_IVAL(obj) = value;
+
+	return obj;
+}
+
+qse_scm_obj_t* qse_scm_makeint (qse_scm_mem_t* mem, qse_long_t value)
+{
+	if (value >= 0 && value < QSE_COUNTOF(mem->num)) return mem->num[value];
+	return makeint (mem, value);
+}
+
+qse_scm_obj_t* qse_scm_makereal (qse_scm_mem_t* mem, qse_real_t value)
+{
+	qse_scm_obj_t* obj;
+
+	obj = allocate (mem, 
+		QSE_SCM_OBJ_REAL, QSE_SIZEOF(qse_scm_obj_real_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+	
+	QSE_SCM_RVAL(obj) = value;
+
+	return obj;
+}
+
+qse_scm_obj_t* qse_scm_makesym (
+	qse_scm_mem_t* mem, const qse_char_t* str, qse_size_t len)
+{
+	qse_scm_obj_t* obj;
+
+/* TODO: use rbt or htb ... */
+
+	/* look for a sysmbol with the given name */
+	obj = mem->used[QSE_SCM_OBJ_SYM];
+	while (obj != QSE_NULL) 
+	{
+		/* if there is a symbol with the same name, it is just used. */
+		if (qse_strxncmp (
+			QSE_SCM_SYMPTR(obj), 
+			QSE_SCM_SYMLEN(obj), 
+			str, len) == 0) return obj;
+		obj = QSE_SCM_LINK(obj);
+	}
+
+	/* no such symbol found. create a new one */
+	obj = allocate (mem, QSE_SCM_OBJ_SYM,
+		QSE_SIZEOF(qse_scm_obj_sym_t)+(len + 1)*QSE_SIZEOF(qse_char_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+
+	/* fill in the symbol buffer */
+	qse_strncpy (QSE_SCM_SYMPTR(obj), str, len);
+
+	return obj;
+}
+
+qse_scm_obj_t* qse_scm_makestr (
+	qse_scm_mem_t* mem, const qse_char_t* str, qse_size_t len)
+{
+	qse_scm_obj_t* obj;
+
+	/* allocate memory for the string */
+	obj = allocate (mem, QSE_SCM_OBJ_STR,
+		QSE_SIZEOF(qse_scm_obj_str_t)+(len + 1)*QSE_SIZEOF(qse_char_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+
+	/* fill in the string buffer */
+	qse_strncpy (QSE_SCM_STRPTR(obj), str, len);
+
+	return obj;
+}
+
+qse_scm_obj_t* qse_scm_makecons (
+	qse_scm_mem_t* mem, qse_scm_obj_t* car, qse_scm_obj_t* cdr)
+{
+	qse_scm_obj_t* obj;
+
+	obj = allocate (mem,
+		QSE_SCM_OBJ_CONS, QSE_SIZEOF(qse_scm_obj_cons_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+
+	QSE_SCM_CAR(obj) = car;
+	QSE_SCM_CDR(obj) = cdr;
+
+	return obj;
+}
+
+qse_scm_obj_t* qse_scm_makefunc (
+	qse_scm_mem_t* mem, qse_scm_obj_t* formal, qse_scm_obj_t* body)
+{
+	qse_scm_obj_t* obj;
+
+	obj = allocate (mem,
+		QSE_SCM_OBJ_FUNC, QSE_SIZEOF(qse_scm_obj_func_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+
+	QSE_SCM_FFORMAL(obj) = formal;
+	QSE_SCM_FBODY(obj)   = body;
+
+	return obj;
+}
+
+qse_scm_obj_t* qse_scm_makemacro (
+	qse_scm_mem_t* mem, qse_scm_obj_t* formal, qse_scm_obj_t* body)
+{
+	qse_scm_obj_t* obj;
+
+	obj = allocate (mem, 
+		QSE_SCM_OBJ_MACRO, QSE_SIZEOF(qse_scm_obj_macro_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+
+	QSE_SCM_MFORMAL(obj) = formal;
+	QSE_SCM_MBODY(obj)   = body;
+
+	return obj;
+}
+
+qse_scm_obj_t* qse_scm_makeprim (qse_scm_mem_t* mem, 
+	qse_scm_prim_t impl, qse_size_t min_args, qse_size_t max_args)
+{
+	qse_scm_obj_t* obj;
+
+	obj = allocate (
+		mem, QSE_SCM_OBJ_PRIM, QSE_SIZEOF(qse_scm_obj_prim_t));
+	if (obj == QSE_NULL) return QSE_NULL;
+
+	QSE_SCM_PIMPL(obj) = impl;
+	QSE_SCM_PMINARGS(obj) = min_args;
+	QSE_SCM_PMAXARGS(obj) = max_args;
+	return obj;
+}
+
+qse_scm_assoc_t* qse_scm_lookup (qse_scm_mem_t* mem, qse_scm_obj_t* name)
+{
+	qse_scm_frame_t* frame;
+	qse_scm_assoc_t* assoc;
+
+	QSE_ASSERT (QSE_SCM_TYPE(name) == QSE_SCM_OBJ_SYM);
+
+	frame = mem->frame;
+
+	while (frame != QSE_NULL) 
+	{
+		assoc = qse_scm_lookupinframe (mem->scm, frame, name);
+		if (assoc != QSE_NULL) return assoc;
+		frame = frame->link;
+	}
+
+	return QSE_NULL;
+}
+
+qse_scm_assoc_t* qse_scm_setvalue (
+	qse_scm_mem_t* mem, qse_scm_obj_t* name, qse_scm_obj_t* value)
+{
+	qse_scm_assoc_t* assoc;
+
+	assoc = qse_scm_lookup (mem, name);
+	if (assoc == QSE_NULL)
+	{
+		assoc = qse_scm_insvalueintoframe (
+			mem->scm, mem->root_frame, name, value);
+		if (assoc == QSE_NULL) return QSE_NULL;
+	}
+	else assoc->value = value;
+
+	return assoc;
+}
+
+qse_scm_assoc_t* qse_scm_setfunc (
+	qse_scm_mem_t* mem, qse_scm_obj_t* name, qse_scm_obj_t* func)
+{
+	qse_scm_assoc_t* assoc;
+
+	assoc = qse_scm_lookup (mem, name);
+	if (assoc == QSE_NULL) 
+	{
+		assoc = qse_scm_insfuncintoframe (
+			mem->scm, mem->root_frame, name, func);
+		if (assoc == QSE_NULL) return QSE_NULL;
+	}
+	else assoc->func = func;
+
+	return assoc;
+}
+
+qse_size_t qse_scm_conslen (qse_scm_mem_t* mem, qse_scm_obj_t* obj)
+{
+	qse_size_t count;
+
+	QSE_ASSERT (
+		obj == mem->nil || QSE_SCM_TYPE(obj) == QSE_SCM_OBJ_CONS);
+
+	count = 0;
+	/*while (obj != mem->nil) {*/
+	while (QSE_SCM_TYPE(obj) == QSE_SCM_OBJ_CONS) 
+	{
+		count++;
+		obj = QSE_SCM_CDR(obj);
+	}
+
+	return count;
+}
+
+
+
--- a/qse/lib/scm/mem.h
+++ b/qse/lib/scm/mem.h
@ -0,0 +1,100 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2009 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _QSE_LIB_SCM_MEM_H_
+#define _QSE_LIB_SCM_MEM_H_
+
+#ifndef _QSE_SCM_SCM_H_
+#error Never include this file directly. Include <qse/scm/scm.h> instead
+#endif
+
+enum
+{
+	QSE_SCM_OBJ_NIL = 0,
+	QSE_SCM_OBJ_TRUE,
+	QSE_SCM_OBJ_INT,
+	QSE_SCM_OBJ_REAL,
+	QSE_SCM_OBJ_SYM,
+	QSE_SCM_OBJ_STR,
+	QSE_SCM_OBJ_CONS,
+	QSE_SCM_OBJ_FUNC,
+	QSE_SCM_OBJ_MACRO,
+	QSE_SCM_OBJ_PRIM,
+
+	QSE_SCM_TYPE_COUNT /* the number of lsp object types */
+};
+
+
+typedef struct qse_scm_mem_t qse_scm_mem_t;
+
+struct qse_scm_mem_t
+{
+	qse_scm_t* scm;
+
+	/* object allocation list */
+	qse_size_t ubound; /* upper bounds of the maximum number of objects */
+	qse_size_t ubound_inc; /* increment of the upper bounds */
+	qse_size_t count;  /* the number of objects currently allocated */
+	qse_scm_obj_t* used[QSE_SCM_TYPE_COUNT];
+	qse_scm_obj_t* free[QSE_SCM_TYPE_COUNT];
+
+	struct
+	{
+		qse_scm_obj_t* obj;
+		qse_scm_obj_t* tmp; /* temporary datum to protect from gc in read() */
+		qse_scm_obj_t* stack;
+	} r;
+
+	/* commonly accessed objects */
+	qse_scm_obj_t* nil;     /* qse_scm_obj_nil_t */
+	qse_scm_obj_t* t;       /* qse_scm_obj_true_t */
+	qse_scm_obj_t* quote;   /* qse_scm_obj_sym_t */
+	qse_scm_obj_t* lambda;  /* qse_scm_obj_sym_t */
+	qse_scm_obj_t* macro;   /* qse_scm_obj_sym_t */
+	qse_scm_obj_t* num[10]; /* qse_scm_obj_int_t */
+
+#if 0
+	/* run-time environment frame */
+	qse_scm_frame_t* frame;
+	/* pointer to a global-level frame */
+	qse_scm_frame_t* root_frame;
+	/* pointer to an interim frame not yet added to "frame" */
+	qse_scm_frame_t* brooding_frame; 
+
+	/* links for temporary objects */
+	qse_scm_tlink_t* tlink;
+	qse_size_t tlink_count;
+#endif
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+	
+qse_scm_mem_t* qse_scm_initmem (
+	qse_scm_mem_t* mem, qse_scm_t* scm,
+	qse_size_t ubound, qse_size_t ubound_inc);
+void qse_scm_finimem (qse_scm_mem_t* mem);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
--- a/qse/lib/scm/scm.c
+++ b/qse/lib/scm/scm.c
@ -0,0 +1,168 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2009 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "scm.h"
+
+QSE_IMPLEMENT_COMMON_FUNCTIONS (scm)
+
+static qse_scm_t* qse_scm_init (
+	qse_scm_t*           scm,
+	qse_mmgr_t*          mmgr,
+	const qse_scm_prm_t* prm,
+	qse_size_t           mem_ubound,
+	qse_size_t mem_ubound_inc
+);
+
+static void qse_scm_fini (qse_scm_t* scm);
+
+qse_scm_t* qse_scm_open (
+	qse_mmgr_t* mmgr, qse_size_t xtnsize, const qse_scm_prm_t* prm, 
+	qse_size_t mem_ubound, qse_size_t mem_ubound_inc)
+{
+	qse_scm_t* scm;
+
+	if (mmgr == QSE_NULL) 
+	{
+		mmgr = QSE_MMGR_GETDFL();
+
+		QSE_ASSERTX (mmgr != QSE_NULL,
+			"Set the memory manager with QSE_MMGR_SETDFL()");
+
+		if (mmgr == QSE_NULL) return QSE_NULL;
+	}
+
+	scm = (qse_scm_t*) QSE_MMGR_ALLOC (mmgr, QSE_SIZEOF(qse_scm_t) + xtnsize);
+	if (scm == QSE_NULL) return QSE_NULL;
+
+	if (qse_scm_init (scm, mmgr, prm, mem_ubound, mem_ubound_inc) == QSE_NULL)
+	{
+		QSE_MMGR_FREE (scm->mmgr, scm);
+		return QSE_NULL;
+	}
+
+	return scm;
+}
+
+void qse_scm_close (qse_scm_t* scm)
+{
+	qse_scm_fini (scm);
+	QSE_SCM_FREE (scm, scm);
+}
+
+static qse_scm_t* qse_scm_init (
+	qse_scm_t* scm, qse_mmgr_t* mmgr, const qse_scm_prm_t* prm,
+	qse_size_t mem_ubound, qse_size_t mem_ubound_inc)
+{
+	if (mmgr == QSE_NULL) mmgr = QSE_MMGR_GETDFL();
+
+	QSE_MEMSET (scm, 0, QSE_SIZEOF(*scm));
+
+	scm->mmgr = mmgr;
+	scm->prm = *prm;
+
+	/* set the default error string function */
+	scm->err.str = qse_scm_dflerrstr;
+
+	/* initialize error data */
+	scm->err.num = QSE_SCM_ENOERR;
+	scm->err.msg[0] = QSE_T('\0');
+
+	/* initialize read data */
+	scm->r.curc = QSE_CHAR_EOF;
+	scm->r.curloc.line = 1;
+	scm->r.curloc.colm = 0;
+
+	if (qse_str_init(&scm->r.t.name, mmgr, 256) == QSE_NULL) 
+	{
+		QSE_SCM_FREE (scm, scm);
+		return QSE_NULL;
+	}
+
+	/* initialize memory manager */
+#if  0
+	if (qse_scm_initmem (
+		&scm->mem, scm, mem_ubound, mem_ubound_inc) == QSE_NULL)
+	{
+		qse_str_fini (&scm->r.t.name);
+		QSE_SCM_FREE (scm, scm);
+		return QSE_NULL;
+	}
+#endif
+
+	return scm;
+}
+
+static void qse_scm_fini (qse_scm_t* scm)
+{
+#if 0
+	qse_scm_finimem (&scm->mem);
+#endif
+	qse_str_fini (&scm->r.t.name);
+}
+
+void qse_scm_detachio (qse_scm_t* scm)
+{
+	if (scm->io.fns.out)
+	{
+		scm->io.fns.out (scm, QSE_SCM_IO_CLOSE, &scm->io.arg.out, QSE_NULL, 0);
+		scm->io.fns.out = QSE_NULL;
+	}
+
+	if (scm->io.fns.in)
+	{
+		scm->io.fns.in (scm, QSE_SCM_IO_CLOSE, &scm->io.arg.in, QSE_NULL, 0);
+		scm->io.fns.in = QSE_NULL;
+
+		scm->r.curc = QSE_CHAR_EOF; /* TODO: needed??? */
+	}
+}
+
+int qse_scm_attachio (qse_scm_t* scm, qse_scm_io_t* io)
+{
+	qse_scm_detachio(scm);
+
+	QSE_ASSERT (scm->io.fns.in == QSE_NULL);
+	QSE_ASSERT (scm->io.fns.out == QSE_NULL);
+
+	scm->err.num = QSE_SCM_ENOERR;
+	if (io->in (scm, QSE_SCM_IO_OPEN, &scm->io.arg.in, QSE_NULL, 0) <= -1)
+	{
+		if (scm->err.num == QSE_SCM_ENOERR)
+			qse_scm_seterror (scm, QSE_SCM_EIO, QSE_NULL, QSE_NULL);
+		return -1;
+	}
+
+	scm->err.num = QSE_SCM_ENOERR;
+	if (io->out (scm, QSE_SCM_IO_OPEN, &scm->io.arg.out, QSE_NULL, 0) <= -1)
+	{
+		if (scm->err.num == QSE_SCM_ENOERR)
+			qse_scm_seterror (scm,QSE_SCM_EIO, QSE_NULL, QSE_NULL);
+		io->in (scm, QSE_SCM_IO_CLOSE, &scm->io.arg.in, QSE_NULL, 0);
+		return -1;
+	}
+
+	scm->io.fns = *io;
+	scm->r.curc = QSE_CHAR_EOF;
+	scm->r.curloc.line = 1;
+	scm->r.curloc.colm = 0;
+
+	return 0;
+}
+
--- a/qse/lib/scm/scm.h
+++ b/qse/lib/scm/scm.h
@ -0,0 +1,115 @@
+/*
+ * $Id$
+ *
+    Copyright 2006-2009 Chung, Hyung-Hwan.
+    This file is part of QSE.
+
+    QSE is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as 
+    published by the Free Software Foundation, either version 3 of 
+    the License, or (at your option) any later version.
+
+    QSE is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public 
+    License along with QSE. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _QSE_LIB_SCM_SCM_H_
+#define _QSE_LIB_SCM_SCM_H_
+
+#include "../cmn/mem.h"
+#include <qse/cmn/chr.h>
+#include <qse/cmn/str.h>
+#include <qse/scm/scm.h>
+
+#include "mem.h"
+
+#define QSE_SCM_ALLOC(scm,size)       QSE_MMGR_ALLOC((scm)->mmgr,size)
+#define QSE_SCM_REALLOC(scm,ptr,size) QSE_MMGR_REALLOC((scm)->mmgr,ptr,size)
+#define QSE_SCM_FREE(scm,ptr)         QSE_MMGR_FREE((scm)->mmgr,ptr)
+
+#define QSE_SCM_ISUPPER(scm,c)  QSE_ISUPPER(c)
+#define QSE_SCM_ISLOWER(scm,c)  QSE_ISLOWER(c)
+#define QSE_SCM_ISALPHA(scm,c)  QSE_ISALPHA(c)
+#define QSE_SCM_ISDIGIT(scm,c)  QSE_ISDIGIT(c)
+#define QSE_SCM_ISXDIGIT(scm,c) QSE_ISXDIGIT(c)
+#define QSE_SCM_ISALNUM(scm,c)  QSE_ISALNUM(c)
+#define QSE_SCM_ISSPACE(scm,c)  QSE_ISSPACE(c)
+#define QSE_SCM_ISPRINT(scm,c)  QSE_ISPRINT(c)
+#define QSE_SCM_ISGRAPH(scm,c)  QSE_ISGRAPH(c)
+#define QSE_SCM_ISCNTRL(scm,c)  QSE_ISCNTRL(c)
+#define QSE_SCM_ISPUNCT(scm,c)  QSE_ISPUNCT(c)
+#define QSE_SCM_TOUPPER(scm,c)  QSE_TOUPPER(c)
+#define QSE_SCM_TOLOWER(scm,c)  QSE_TOLOWER(c)
+
+struct qse_scm_t 
+{
+	QSE_DEFINE_COMMON_FIELDS (scm)
+
+	qse_scm_prm_t prm;
+	int opt_undef_symbol;
+
+	/** error information */
+	struct 
+	{
+		qse_scm_errstr_t str;      /**< error string getter */
+		qse_scm_errnum_t num;      /**< stores an error number */
+		qse_char_t       msg[128]; /**< error message holder */
+		qse_scm_loc_t    loc;      /**< location of the last error */
+	} err; 
+
+	/** memory manager */
+	qse_scm_mem_t mem;
+
+	/** I/O functions */
+	struct
+	{
+		qse_scm_io_t fns;
+
+		struct
+		{
+			qse_scm_io_arg_t in;
+			qse_scm_io_arg_t out;
+		} arg;
+	} io;
+
+	/** data for reading */
+	struct
+	{
+		qse_cint_t curc; 
+		qse_scm_loc_t curloc;
+
+		/** token */
+		struct
+		{
+			int           type;
+			qse_scm_loc_t loc;
+			qse_long_t    ival;
+			qse_real_t    rval;
+			qse_str_t     name;
+		} t;
+	} r;
+
+	/** data for evaluation */
+	/*
+	struct
+	{
+	} e;
+	*/
+};
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* err.c */
+const qse_char_t* qse_scm_dflerrstr (qse_scm_t* scm, qse_scm_errnum_t errnum);
+
+#ifdef __cplusplus
+}
+#endif
+#endif