diff --git a/qse/include/qse/cmn/opt.h b/qse/include/qse/cmn/opt.h
index 82e1ded2..98013236 100644
--- a/qse/include/qse/cmn/opt.h
+++ b/qse/include/qse/cmn/opt.h
@@ -69,11 +69,15 @@ struct qse_opt_t
 #define QSE_CLI_OPTNAME (1 << 0)
 #define QSE_CLI_OPTVAL  (1 << 1)
 
-#define QSE_CLI_ERROR_INVALID_OPTNAME  1
-#define QSE_CLI_ERROR_MISSING_OPTNAME  2
-#define QSE_CLI_ERROR_REDUNDANT_OPTVAL 3
-#define QSE_CLI_ERROR_MISSING_OPTVAL   4
-#define QSE_CLI_ERROR_MEMORY           5
+enum qse_cli_error_code_t
+{
+	QSE_CLI_ERROR_INVALID_OPTNAME  = 1,
+	QSE_CLI_ERROR_MISSING_OPTNAME  = 2,
+	QSE_CLI_ERROR_REDUNDANT_OPTVAL = 3,
+	QSE_CLI_ERROR_MISSING_OPTVAL   = 4,
+	QSE_CLI_ERROR_MEMORY           = 5
+};
+typedef enum qse_cli_error_code_t qse_cli_error_code_t;
 
 typedef struct qse_cli_opt_t qse_cli_opt_t;
 typedef struct qse_cli_t qse_cli_t;
@@ -89,10 +93,10 @@ struct qse_cli_opt_t
 };
 
 typedef int (*qse_cli_errcb_t) (
-	qse_cli_t*        cli,
-	int               code, 
-	const qse_char_t* qname,
-	const qse_char_t* qval
+	qse_cli_t*           cli,
+	qse_cli_error_code_t code, 
+	const qse_char_t*    qname,
+	const qse_char_t*    qval
 );
 
 struct qse_cli_data_t
diff --git a/qse/include/qse/cmn/time.h b/qse/include/qse/cmn/time.h
index 28a75fca..79c320f4 100644
--- a/qse/include/qse/cmn/time.h
+++ b/qse/include/qse/cmn/time.h
@@ -221,6 +221,28 @@ QSE_EXPORT void qse_subtime (
 	qse_ntime_t*       z
 );
 
+
+/**
+ * The qse_strtontime() function converts a numeric text to the numeric time.
+ *  seconds.nanoseconds
+ *  10.231
+ */
+QSE_EXPORT int qse_mbs_to_ntime (
+	const qse_mchar_t* text,
+	qse_ntime_t*       ntime
+);
+
+QSE_EXPORT int qse_wcs_to_ntime (
+	const qse_wchar_t* text,
+	qse_ntime_t*       ntime
+);
+
+#if defined(QSE_CHAR_IS_MCHAR)
+#	define qse_str_to_ntime(text,ntime) qse_mbs_to_ntime(text,ntime)
+#else
+#	define qse_str_to_ntime(text,ntime) qse_wcs_to_ntime(text,ntime)
+#endif
+
 #if defined(__cplusplus)
 }
 #endif
diff --git a/qse/lib/cmn/time.c b/qse/lib/cmn/time.c
index 98a26f35..cd964c91 100644
--- a/qse/lib/cmn/time.c
+++ b/qse/lib/cmn/time.c
@@ -25,6 +25,8 @@
  */
 
 #include <qse/cmn/time.h>
+
+#include <qse/cmn/chr.h>
 #include "mem-prv.h"
 
 #if defined(_WIN32)
@@ -613,3 +615,103 @@ void qse_subtime (const qse_ntime_t* x, const qse_ntime_t* y, qse_ntime_t* z)
 		z->nsec = z->nsec + QSE_NSECS_PER_SEC;
 	}
 }
+
+
+
+int qse_mbs_to_ntime (const qse_mchar_t* text, qse_ntime_t* ntime)
+{
+	const qse_mchar_t* p = text, * cp;
+	qse_ntime_t tv = { 0, 0 };
+	int neg = 0;
+
+	if (*p == QSE_MT('-')) 
+	{
+		neg = 1;
+		p++;
+	}
+	else if (*p == QSE_MT('+'))
+	{
+		p++;
+	}
+
+	cp = p;
+	while (QSE_ISMDIGIT(*p))
+	{
+		qse_long_t oldsec = tv.sec;
+		tv.sec = tv.sec * 10 + (*p - QSE_MT('0'));
+		if (tv.sec < oldsec) return -1; /* overflow? */
+		p++;
+	}
+	if (cp == p) return -1;
+
+	if (*p == QSE_MT('.'))
+	{
+		qse_int32_t base = QSE_SEC_TO_NSEC(1); /* 1000000000 */
+
+		p++;
+		base /= 10; /* the max value is 999999999. 9 digits ony */
+
+		while (*p && QSE_ISMDIGIT(*p) && base > 0)
+		{
+			tv.nsec += (*p - QSE_MT('0')) * base;
+			base /= 10;
+			p++;
+		}
+	}
+
+	if (*p != QSE_MT('\0')) return -1;
+
+	if (neg) tv.sec *= -1;
+	*ntime = tv;
+
+	return 0;
+}
+
+int qse_wcs_to_ntime (const qse_wchar_t* text, qse_ntime_t* ntime)
+{
+	const qse_wchar_t* p = text, * cp;
+	qse_ntime_t tv = { 0, 0 };
+	int neg = 0;
+
+	if (*p == QSE_WT('-')) 
+	{
+		neg = 1;
+		p++;
+	}
+	else if (*p == QSE_WT('+'))
+	{
+		p++;
+	}
+
+	cp = p;
+	while (QSE_ISWDIGIT(*p))
+	{
+		qse_long_t oldsec = tv.sec;
+		tv.sec = tv.sec * 10 +  (*p - QSE_WT('0'));
+		if (tv.sec < oldsec) return -1; /* overflow? */
+		p++;
+	}
+	if (cp == p) return -1;
+
+	if (*p == QSE_WT('.'))
+	{
+		qse_int32_t base = QSE_SEC_TO_NSEC(1); /* 1000000000 */
+
+		p++;
+		base /= 10; /* the max value is 999999999. 9 digits ony */
+
+		while (*p && QSE_ISWDIGIT(*p) && base > 0)
+		{
+			tv.nsec += (*p - QSE_WT('0')) * base;
+			base /= 10;
+			p++;
+		}
+	}
+
+	if (*p != QSE_WT('\0')) return -1;
+
+	if (neg) tv.sec *= -1;
+	*ntime = tv;
+
+	return 0;
+}