diff --git a/qse/include/qse/awk/awk.h b/qse/include/qse/awk/awk.h
index cbd477d4..63599bef 100644
--- a/qse/include/qse/awk/awk.h
+++ b/qse/include/qse/awk/awk.h
@@ -1,5 +1,5 @@
 /*
- * $Id: awk.h 78 2009-02-23 14:03:28Z hyunghwan.chung $
+ * $Id: awk.h 79 2009-02-24 03:57:28Z hyunghwan.chung $
  *
    Copyright 2006-2009 Chung, Hyung-Hwan.
 
@@ -49,14 +49,142 @@ typedef struct qse_awk_t     qse_awk_t;
 typedef struct qse_awk_rtx_t qse_awk_rtx_t; /* (R)untime con(T)e(X)t */
 /******/
 
+/* this is not a value. it is just a value holder */
+typedef struct qse_awk_val_chunk_t qse_awk_val_chunk_t;
+
+#if QSE_SIZEOF_INT == 2
+#	define QSE_AWK_VAL_HDR \
+		unsigned int type: 3; \
+		unsigned int ref: 13
+#else
+#	define QSE_AWK_VAL_HDR \
+		unsigned int type: 3; \
+		unsigned int ref: 29
+#endif
+
+#define QSE_AWK_VAL_TYPE(x) ((x)->type)
+
+/****s* AWK/qse_awk_val_t
+ * NAME
+ *  qse_awk_val_t - define an abstract value type
+ * SYNOPSIS
+ */
+struct qse_awk_val_t
+{
+	QSE_AWK_VAL_HDR;	
+};
 typedef struct qse_awk_val_t qse_awk_val_t;
+/******/
+
+/****s* AWK/qse_awk_val_nil_t
+ * NAME
+ *  qse_awk_val_nil_t - define a nil value type
+ * DESCRIPTION
+ *  The type field is QSE_AWK_VAL_NIL.
+ * SYNOPSIS
+ */
+struct qse_awk_val_nil_t
+{
+	QSE_AWK_VAL_HDR;
+};
+typedef struct qse_awk_val_nil_t  qse_awk_val_nil_t;
+/******/
+
+/****s* AWK/qse_awk_val_int_t
+ * NAME
+ *  qse_awk_val_int_t - define an integer number type
+ * DESCRIPTION
+ *  The type field is QSE_AWK_VAL_INT.
+ * SYNOPSIS
+ */
+struct qse_awk_val_int_t
+{
+	QSE_AWK_VAL_HDR;
+	qse_long_t val;
+	void*      nde;
+};
+typedef struct qse_awk_val_int_t qse_awk_val_int_t;
+/******/
+
+/****s* AWK/qse_awk_val_real_t
+ * NAME
+ *  qse_awk_val_real_t - define a floating-point number type
+ * DESCRIPTION
+ *  The type field is QSE_AWK_VAL_REAL.
+ * SYNOPSIS
+ */
+struct qse_awk_val_real_t
+{
+	QSE_AWK_VAL_HDR;
+	qse_real_t val;
+	void*      nde;
+};
+typedef struct qse_awk_val_real_t qse_awk_val_real_t;
+/******/
+
+/****s* AWK/qse_awk_val_str_t
+ * NAME
+ *  qse_awk_val_str_t - define a string type
+ * DESCRIPTION
+ *  The type field is QSE_AWK_VAL_STR.
+ * SYNOPSIS
+ */
+struct qse_awk_val_str_t
+{
+	QSE_AWK_VAL_HDR;
+	qse_char_t* ptr;
+	qse_size_t  len;
+};
+typedef struct qse_awk_val_str_t  qse_awk_val_str_t;
+/******/
+
+/****s* AWK/qse_awk_val_rex_t
+ * NAME
+ *  qse_awk_val_rex_t - define a regular expression type
+ * DESCRIPTION
+ *  The type field is QSE_AWK_VAL_REX.
+ * SYNOPSIS
+ */
+struct qse_awk_val_rex_t
+{
+	QSE_AWK_VAL_HDR;
+	qse_char_t* ptr;
+	qse_size_t  len;
+	void*       code;
+};
+typedef struct qse_awk_val_rex_t  qse_awk_val_rex_t;
+/******/
+
+/* QSE_AWK_VAL_MAP */
+struct qse_awk_val_map_t
+{
+	QSE_AWK_VAL_HDR;
+
+	/* TODO: make val_map to array if the indices used are all 
+	 *       integers switch to map dynamically once the 
+	 *       non-integral index is seen.
+	 */
+	qse_map_t* map; 
+};
+typedef struct qse_awk_val_map_t  qse_awk_val_map_t;
+
+/* QSE_AWK_VAL_REF */
+struct qse_awk_val_ref_t
+{
+	QSE_AWK_VAL_HDR;
+
+	int id;
+	/* if id is QSE_AWK_VAL_REF_POS, adr holds an index of the 
+	 * positional variable. Otherwise, adr points to the value 
+	 * directly. */
+	qse_awk_val_t** adr;
+};
+typedef struct qse_awk_val_ref_t  qse_awk_val_ref_t;
 
 typedef struct qse_awk_prm_t qse_awk_prm_t;
 typedef struct qse_awk_sio_t qse_awk_sio_t;
-
 typedef struct qse_awk_rio_t qse_awk_rio_t;
 typedef struct qse_awk_riod_t qse_awk_riod_t;
-
 typedef struct qse_awk_rcb_t qse_awk_rcb_t;
 
 typedef qse_real_t (*qse_awk_pow_t) (
@@ -582,131 +710,6 @@ struct qse_awk_valtostr_out_t
 typedef struct qse_awk_valtostr_out_t qse_awk_valtostr_out_t;
 #endif
 
-typedef struct qse_awk_val_nil_t  qse_awk_val_nil_t;
-typedef struct qse_awk_val_rex_t  qse_awk_val_rex_t;
-typedef struct qse_awk_val_map_t  qse_awk_val_map_t;
-typedef struct qse_awk_val_ref_t  qse_awk_val_ref_t;
-
-/* this is not a value. it is just a value holder */
-typedef struct qse_awk_val_chunk_t qse_awk_val_chunk_t;
-
-#if QSE_SIZEOF_INT == 2
-#	define QSE_AWK_VAL_HDR \
-		unsigned int type: 3; \
-		unsigned int ref: 13
-#else
-#	define QSE_AWK_VAL_HDR \
-		unsigned int type: 3; \
-		unsigned int ref: 29
-#endif
-
-#define QSE_AWK_VAL_TYPE(x) ((x)->type)
-
-/****s* AWK/qse_awk_val_t
- * NAME
- *  qse_awk_val_t - define an abstract value type
- * SYNOPSIS
- */
-struct qse_awk_val_t
-{
-	QSE_AWK_VAL_HDR;	
-};
-/******/
-
-/****s* AWK/qse_awk_val_nil_t
- * NAME
- *  qse_awk_val_nil_t - define a nil value type
- * DESCRIPTION
- *  The type field is QSE_AWK_VAL_NIL.
- * SYNOPSIS
- */
-struct qse_awk_val_nil_t
-{
-	QSE_AWK_VAL_HDR;
-};
-/******/
-
-/****s* AWK/qse_awk_val_int_t
- * NAME
- *  qse_awk_val_int_t - define an integer number type
- * DESCRIPTION
- *  The type field is QSE_AWK_VAL_INT.
- * SYNOPSIS
- */
-struct qse_awk_val_int_t
-{
-	QSE_AWK_VAL_HDR;
-	qse_long_t val;
-	void*      nde;
-};
-typedef struct qse_awk_val_int_t qse_awk_val_int_t;
-/******/
-
-/****s* AWK/qse_awk_val_real_t
- * NAME
- *  qse_awk_val_real_t - define a floating-point number type
- * DESCRIPTION
- *  The type field is QSE_AWK_VAL_REAL.
- * SYNOPSIS
- */
-struct qse_awk_val_real_t
-{
-	QSE_AWK_VAL_HDR;
-	qse_real_t val;
-	void*      nde;
-};
-typedef struct qse_awk_val_real_t qse_awk_val_real_t;
-/******/
-
-/****s* AWK/qse_awk_val_str_t
- * NAME
- *  qse_awk_val_str_t - define a string type
- * DESCRIPTION
- *  The type field is QSE_AWK_VAL_STR.
- * SYNOPSIS
- */
-struct qse_awk_val_str_t
-{
-	QSE_AWK_VAL_HDR;
-	qse_char_t* ptr;
-	qse_size_t  len;
-};
-typedef struct qse_awk_val_str_t  qse_awk_val_str_t;
-/******/
-
-/* QSE_AWK_VAL_REX */
-struct qse_awk_val_rex_t
-{
-	QSE_AWK_VAL_HDR;
-	qse_char_t* ptr;
-	qse_size_t  len;
-	void*       code;
-};
-
-/* QSE_AWK_VAL_MAP */
-struct qse_awk_val_map_t
-{
-	QSE_AWK_VAL_HDR;
-
-	/* TODO: make val_map to array if the indices used are all 
-	 *       integers switch to map dynamically once the 
-	 *       non-integral index is seen.
-	 */
-	qse_map_t* map; 
-};
-
-/* QSE_AWK_VAL_REF */
-struct qse_awk_val_ref_t
-{
-	QSE_AWK_VAL_HDR;
-
-	int id;
-	/* if id is QSE_AWK_VAL_REF_POS, adr holds an index of the 
-	 * positional variable. Otherwise, adr points to the value 
-	 * directly. */
-	qse_awk_val_t** adr;
-};
-
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -1492,7 +1495,7 @@ qse_awk_val_t* qse_awk_rtx_makerealval (
 );
 
 qse_awk_val_t* qse_awk_rtx_makestrval0 (
-	qse_awk_rtx_t* rtx,
+	qse_awk_rtx_t*    rtx,
 	const qse_char_t* str
 );
 
diff --git a/qse/include/qse/utl/Makefile.am b/qse/include/qse/utl/Makefile.am
index 8cbdfb13..3341bcbc 100644
--- a/qse/include/qse/utl/Makefile.am
+++ b/qse/include/qse/utl/Makefile.am
@@ -1,5 +1,5 @@
 
-pkginclude_HEADERS = http.h main.h stdio.h
+pkginclude_HEADERS = http.h main.h stdio.h sed.h tgp.h
 
 pkgincludedir= $(includedir)/qse/utl
 
diff --git a/qse/include/qse/utl/Makefile.in b/qse/include/qse/utl/Makefile.in
index 72236959..bdc6b90c 100644
--- a/qse/include/qse/utl/Makefile.in
+++ b/qse/include/qse/utl/Makefile.in
@@ -177,7 +177,7 @@ sysconfdir = @sysconfdir@
 target_alias = @target_alias@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-pkginclude_HEADERS = http.h main.h stdio.h
+pkginclude_HEADERS = http.h main.h stdio.h sed.h tgp.h
 CLEANFILES = *dist
 all: all-am
 
diff --git a/qse/lib/cmn/Makefile.am b/qse/lib/cmn/Makefile.am
index a08a11b2..4eee794a 100644
--- a/qse/lib/cmn/Makefile.am
+++ b/qse/lib/cmn/Makefile.am
@@ -3,7 +3,8 @@ AUTOMAKE_OPTIONS = nostdinc
 AM_CFLAGS = -I$(top_builddir)/include
 
 lib_LTLIBRARIES = libqsecmn.la
-libqsecmn_la_SOURCES = mem.h chr.h \
+libqsecmn_la_SOURCES = \
+	syscall.h mem.h chr.h \
 	mem.c chr.c chr_cnv.c rex.c \
 	str_bas.c str_cnv.c str_dyn.c str_utl.c \
 	lda.c map.c sll.c dll.c opt.c \
diff --git a/qse/lib/cmn/Makefile.in b/qse/lib/cmn/Makefile.in
index 671d8e8f..faaff329 100644
--- a/qse/lib/cmn/Makefile.in
+++ b/qse/lib/cmn/Makefile.in
@@ -200,7 +200,8 @@ top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = nostdinc
 AM_CFLAGS = -I$(top_builddir)/include
 lib_LTLIBRARIES = libqsecmn.la
-libqsecmn_la_SOURCES = mem.h chr.h \
+libqsecmn_la_SOURCES = \
+	syscall.h mem.h chr.h \
 	mem.c chr.c chr_cnv.c rex.c \
 	str_bas.c str_cnv.c str_dyn.c str_utl.c \
 	lda.c map.c sll.c dll.c opt.c \
diff --git a/qse/lib/cmn/syscall.h b/qse/lib/cmn/syscall.h
index 4acfbff2..84c8e728 100644
--- a/qse/lib/cmn/syscall.h
+++ b/qse/lib/cmn/syscall.h
@@ -4,171 +4,165 @@
 /* This file defines unix/linux system calls */
 
 #ifdef HAVE_SYS_TYPES_H
-#include <sys/types.h>
+#	include <sys/types.h>
 #endif
 #ifdef HAVE_UNISTD_H
-#include <unistd.h>
+#	include <unistd.h>
 #endif
 #ifdef HAVE_SYS_WAIT_H
-#include <sys/wait.h>
+#	include <sys/wait.h>
 #endif
 #ifdef HAVE_SIGNAL_H
-#include <signal.h>
+#	include <signal.h>
 #endif
 #ifdef HAVE_ERRNO_H
-#include <errno.h>
+#	include <errno.h>
 #endif
 
 #if defined(QSE_USE_SYSCALL) && defined(HAVE_SYS_SYSCALL_H)
-#include <sys/syscall.h>
+#	include <sys/syscall.h>
 #endif
 
 #ifdef SYS_open
-	#define QSE_OPEN(path,flags,mode) syscall(SYS_open,path,flags,mode)
+#	define QSE_OPEN(path,flags,mode) syscall(SYS_open,path,flags,mode)
 #else
-	#define QSE_OPEN(path,flags,mode) open(path,flags,mode)
+#	define QSE_OPEN(path,flags,mode) open(path,flags,mode)
 #endif
 
 #ifdef SYS_close
-	#define QSE_CLOSE(handle) syscall(SYS_close,handle)
+#	define QSE_CLOSE(handle) syscall(SYS_close,handle)
 #else
-	#define QSE_CLOSE(handle) close(handle)
+#	define QSE_CLOSE(handle) close(handle)
 #endif
 
 #ifdef SYS_read
-	#define QSE_READ(handle,buf,size) syscall(SYS_read,handle,buf,size)
+#	define QSE_READ(handle,buf,size) syscall(SYS_read,handle,buf,size)
 #else
-	#define QSE_READ(handle,buf,size) read(handle,buf,size)
+#	define QSE_READ(handle,buf,size) read(handle,buf,size)
 #endif
 
 #ifdef SYS_write
-	#define QSE_WRITE(handle,buf,size) syscall(SYS_write,handle,buf,size)
+#	define QSE_WRITE(handle,buf,size) syscall(SYS_write,handle,buf,size)
 #else
-	#define QSE_WRITE(handle,buf,size) write(handle,buf,size)
+#	define QSE_WRITE(handle,buf,size) write(handle,buf,size)
 #endif
 
 #if !defined(_LP64) && defined(SYS__llseek)
-	#define QSE_LLSEEK(handle,hoffset,loffset,out,whence)  \
-		syscall(SYS__llseek,handle,hoffset,loffset,out,whence)
+#	define QSE_LLSEEK(handle,hoffset,loffset,out,whence) syscall(SYS__llseek,handle,hoffset,loffset,out,whence)
 #elif !defined(_LP64) && defined(HAVE__LLSEEK)
-	#define QSE_LLSEEK(handle,hoffset,loffset,out,whence)  \
-		_llseek(handle,hoffset,loffset,out,whence)
+#	define QSE_LLSEEK(handle,hoffset,loffset,out,whence) _llseek(handle,hoffset,loffset,out,whence)
 #endif
 
 #if defined(SYS_lseek65)
-	#define QSE_LSEEK64(handle,offset,whence) \
-		syscall(SYS_lseek64,handle,offset,whence)
+#	define QSE_LSEEK64(handle,offset,whence) syscall(SYS_lseek64,handle,offset,whence)
 #elif defined(HAVE_lseek64)
-	#define QSE_LSEEK64(handle,offset,whence) \
-		lseek64(handle,offset,whence)
+#	define QSE_LSEEK64(handle,offset,whence) lseek64(handle,offset,whence)
 #endif
 
 #if defined(SYS_lseek)
-	#define QSE_LSEEK(handle,offset,whence) \
-		syscall(SYS_lseek,handle,offset,whence)
+#	define QSE_LSEEK(handle,offset,whence) syscall(SYS_lseek,handle,offset,whence)
 #else
-	#define QSE_LSEEK(handle,offset,whence) \
-		lseek(handle,offset,whence)
+#	define QSE_LSEEK(handle,offset,whence) lseek(handle,offset,whence)
 #endif
 
 #if !defined(_LP64) && defined(SYS_ftruncate64)
-	#define QSE_FTRUNCATE(handle,size) syscall(SYS_ftruncate64,handle,size)
+#	define QSE_FTRUNCATE(handle,size) syscall(SYS_ftruncate64,handle,size)
 #elif defined(SYS_ftruncate)
-	#define QSE_FTRUNCATE(handle,size) syscall(SYS_ftruncate,handle,size)
+#	define QSE_FTRUNCATE(handle,size) syscall(SYS_ftruncate,handle,size)
 #elif !defined(_LP64) && defined(HAVE_FTRUNCATE64)
-	#define QSE_FTRUNCATE(handle,size) ftruncate64(handle,size)
+#	define QSE_FTRUNCATE(handle,size) ftruncate64(handle,size)
 #else
-	#define QSE_FTRUNCATE(handle,size) ftruncate(handle,size)
+#	define QSE_FTRUNCATE(handle,size) ftruncate(handle,size)
 #endif
 
 #if defined(SYS_fchmod)
-	#define QSE_FCHMOD(handle,mode) syscall(SYS_fchmod,handle,mode)
+#	define QSE_FCHMOD(handle,mode) syscall(SYS_fchmod,handle,mode)
 #else
-	#define QSE_FCHMOD(handle,mode) fchmod(handle,mode)
+#	define QSE_FCHMOD(handle,mode) fchmod(handle,mode)
 #endif
 
 #if defined(SYS_fsync)
-	#define QSE_FSYNC(handle) syscall(SYS_fsync,handle)
+#	define QSE_FSYNC(handle) syscall(SYS_fsync,handle)
 #else
-	#define QSE_FSYNC(handle) fsync(handle)
+#	define QSE_FSYNC(handle) fsync(handle)
 #endif
 
 #if defined(SYS_fcntl)
-	#define QSE_FCNTL(handle,cmd,arg) syscall(SYS_fcntl,handle,cmd,arg)
+#	define QSE_FCNTL(handle,cmd,arg) syscall(SYS_fcntl,handle,cmd,arg)
 #else
-	#define QSE_FCNTL(handle,cmd,arg) fcntl(handle,cmd,arg)
+#	define QSE_FCNTL(handle,cmd,arg) fcntl(handle,cmd,arg)
 #endif
 
 #ifdef SYS_dup2
-	#define QSE_DUP2(ofd,nfd) syscall(SYS_dup2,ofd,nfd)
+#	define QSE_DUP2(ofd,nfd) syscall(SYS_dup2,ofd,nfd)
 #else
-	#define QSE_DUP2(ofd,nfd) dup2(ofd,nfd)
+#	define QSE_DUP2(ofd,nfd) dup2(ofd,nfd)
 #endif
 
 #ifdef SYS_pipe
-	#define QSE_PIPE(pfds) syscall(SYS_pipe,pfds)
+#	define QSE_PIPE(pfds) syscall(SYS_pipe,pfds)
 #else
-	#define QSE_PIPE(pfds) pipe(pfds)
+#	define QSE_PIPE(pfds) pipe(pfds)
 #endif
 
 #ifdef SYS_exit
-	#define QSE_EXIT(code) syscall(SYS_exit,code)
+#	define QSE_EXIT(code) syscall(SYS_exit,code)
 #else
-	#define QSE_EXIT(code) _exit(code)
+#	define QSE_EXIT(code) _exit(code)
 #endif
 
 #ifdef SYS_fork
-	#define QSE_FORK() syscall(SYS_fork)
+#	define QSE_FORK() syscall(SYS_fork)
 #else
-	#define QSE_FORK() fork()
+#	define QSE_FORK() fork()
 #endif
 
 #ifdef SYS_execve
-	#define QSE_EXECVE(path,argv,envp) syscall(SYS_execve,path,argv,envp)
+#	define QSE_EXECVE(path,argv,envp) syscall(SYS_execve,path,argv,envp)
 #else
-	#define QSE_EXECVE(path,argv,envp) execve(path,argv,envp)
+#	define QSE_EXECVE(path,argv,envp) execve(path,argv,envp)
 #endif
 
 #ifdef SYS_waitpid
-	#define QSE_WAITPID(pid,status,options) syscall(SYS_waitpid,pid,status,options)
+#	define QSE_WAITPID(pid,status,options) syscall(SYS_waitpid,pid,status,options)
 #else
-	#define QSE_WAITPID(pid,status,options) waitpid(pid,status,options)
+#	define QSE_WAITPID(pid,status,options) waitpid(pid,status,options)
 #endif
 
 #ifdef SYS_kill
-	#define QSE_KILL(pid,sig) syscall(SYS_kill,pid,sig)
+#	define QSE_KILL(pid,sig) syscall(SYS_kill,pid,sig)
 #else
-	#define QSE_KILL(pid,sig) kill(pid,sig)
+#	define QSE_KILL(pid,sig) kill(pid,sig)
 #endif
 
 #ifdef SYS_getpid
-	#define QSE_GETPID() syscall(SYS_getpid)
+#	define QSE_GETPID() syscall(SYS_getpid)
 #else
-	#define QSE_GETPID() getpid()
+#	define QSE_GETPID() getpid()
 #endif
 
 #ifdef SYS_getuid
-	#define QSE_GETUID() syscall(SYS_getuid)
+#	define QSE_GETUID() syscall(SYS_getuid)
 #else
-	#define QSE_GETUID() getuid()
+#	define QSE_GETUID() getuid()
 #endif
 
 #ifdef SYS_geteuid
-	#define QSE_GETEUID() syscall(SYS_geteuid)
+#	define QSE_GETEUID() syscall(SYS_geteuid)
 #else
-	#define QSE_GETEUID() geteuid()
+#	define QSE_GETEUID() geteuid()
 #endif
 
 #ifdef SYS_getgid
-	#define QSE_GETGID() syscall(SYS_getgid)
+#	define QSE_GETGID() syscall(SYS_getgid)
 #else
-	#define QSE_GETGID() getgid()
+#	define QSE_GETGID() getgid()
 #endif
 
 #ifdef SYS_getegid
-	#define QSE_GETEGID() syscall(SYS_getegid)
+#	define QSE_GETEGID() syscall(SYS_getegid)
 #else
-	#define QSE_GETEGID() getegid()
+#	define QSE_GETEGID() getegid()
 #endif
 
 #endif