update

version2.0/lib/bits.nas

@@ -0,0 +1,14 @@
+# nasal lib bits.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
+
+var bits=
+{
+    fld:func(){},
+    sfld:func(){},
+    setfld:func(){},
+    buf:func(){},
+};

version2.0/lib/io.nas

@@ -1,10 +1,22 @@
 # nasal lib io.nas
-# 2020/2/4
+# 2020/2/6
 # this file is used to avoid name confliction
 # and is used to avoid name undefined
 # before running this file will be translated to abstract syntax tree
 # and this ast will be linked before main ast as main-ast's beginning
 
+var io=
+{
+    open:func(){},
+    close:func(){},
+    read:func(){},
+    write:func(){},
+    seek:func(){},
+    tell:func(){},
+    readln:func(){},
+    stat:func(){},
+};
+
 var input=func(filename="")
 {
     if(filename=="")

version2.0/lib/math.nas

@@ -1,5 +1,5 @@
 # nasal lib math.nas
-# 2020/2/4
+# 2020/2/6
 # this file is used to avoid name confliction
 # and is used to avoid name undefined
 # before running this file will be translated to abstract syntax tree
@@ -24,74 +24,8 @@ var math=
     {
         var call_inline_pow=func(num,x){};
         return call_inline_pow(me.e,x);
-    }
+    },
+    ln:func(){},
+    sqrt:func(){},
+    atan2:func(){},
 };
-var __e=2.7182818284590452354;
-var __pi=3.14159265358979323846;
-var __ln_2=0.69314718055994530942;
-var __ln_10=2.30258509299404568402;
-
-var abs=func(number)
-{
-    if(number>0)
-        return number;
-    else
-        return -1*number;
-}
-
-var sin=func(number)
-{
-    return number;
-}
-
-var cos=func(number)
-{
-    return number;
-}
-
-var tan=func(number)
-{
-    return sin(number)/cos(number);
-}
-
-var cot=func(number)
-{
-    return cos(number)/sin(number);
-}
-
-var exp=func(number)
-{
-    var int_num=int(number);
-    var f_num=number-int_num;
-    var __res_exp=exp(int_num);
-    var pw=1;
-    for(var i=1;i<6;i+=1)
-    {
-        __res_exp+=pw/i;
-        pw*=f_num;
-    }
-    return __res_exp;
-}
-
-var ln=func(number)
-{
-    return number;
-}
-
-var sqrt=func(number)
-{
-    var temp = number/8 + 0.5 + 2*number/(4+number);
-    var cnt = 10;
-    while(cnt!=0)
-    {
-        cnt-=1;
-        temp = (temp+number/temp)/2;
-    }
-    return temp;
-}
-
-var atan2=func(x,y)
-{
-    return y/x;
-}
-

version2.0/lib/readline.nas

@@ -0,0 +1,12 @@
+# nasal lib readline.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
+
+# GNU Readline Library
+var readline=func(prompt="> ")
+{
+    return;
+}

version2.0/lib/regex.nas

@@ -0,0 +1,12 @@
+# nasal lib regex.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
+
+var regex=
+{
+    comp:func(){},
+    exec:func(){},
+};

version2.0/lib/sqlite.nas

@@ -0,0 +1,15 @@
+# nasal lib sqlite.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
+
+var sqlite=
+{
+    open:func(){},
+    close:func(){},
+    prepare:func(){},
+    exec:func(){},
+    finalize:func(){},
+};

version2.0/lib/thread.nas

@@ -1,7 +1,17 @@
-#nasal-strict-lib thread
+# nasal lib thread.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
 
-var thread=func(__function)
+var thread=
 {
-    __system_call_cpp_new_thread(__function);
-    return 0;
-}
+    newthread:func(){},
+    newlock:func(){},
+    lock:func(){},
+    unlock:func(){},
+    newsem:func(){},
+    semdown:func(){},
+    semup:func(){},
+};

version2.0/lib/unix.nas

@@ -0,0 +1,22 @@
+# nasal lib unix.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
+
+var unix=
+{
+    pipe:func(){},
+    fork:func(){},
+    dup2:func(){},
+    exec:func(){},
+    waitpid:func(){},
+    opendir:func(){},
+    readdir:func(){},
+    closedir:func(){},
+    time:func(){},
+    chdir:func(){},
+    environ:func(){},
+    sleep:func(){},
+};

version2.0/lib/utf8.nas

@@ -0,0 +1,15 @@
+# nasal lib utf8.nas
+# 2020/2/6
+# this file is used to avoid name confliction
+# and is used to avoid name undefined
+# before running this file will be translated to abstract syntax tree
+# and this ast will be linked before main ast as main-ast's beginning
+
+var utf8=
+{
+    chstr:func(){},
+    strc:func(){},
+    substr:func(){},
+    size:func(){},
+    validate:func(){},
+};

version2.0/nasal_lexer.h

@@ -32,13 +32,14 @@
 		others: __unknown_operator
 */
 
-const std::string lib_filename[9]=
+const std::string lib_filename[10]=
 {
 	"lib/base.nas",
 	"lib/bits.nas",
 	"lib/io.nas",
 	"lib/math.nas",
 	"lib/readline.nas",
+	"lib/regex.nas",
 	"lib/sqlite.nas",
 	"lib/thread.nas",
 	"lib/unix.nas",
@@ -112,7 +113,7 @@ class resource_file
 		void load_lib_file()
 		{
 			resource.clear();
-			for(int i=0;i<9;++i)
+			for(int i=0;i<10;++i)
 			{
 				std::ifstream fin(lib_filename[i],std::ios::binary);
 				if(fin.fail())