update test/md5.nas(still has bug) & add libmd5 in module(written in C++)

module/libmd5.nas

@@ -0,0 +1,8 @@
+import("lib.nas");
+
+var md5=func(str){
+    var lib=dylib.dlopen("./module/libmd5"~(os.platform()=="windows"?".dll":".so"));
+    var res=dylib.dlcall(dylib.dlsym(lib,"nas_md5"),str);
+    dylib.dlclose(lib);
+    return res;
+}

module/makefile

@@ -11,5 +11,12 @@ libkey.so: keyboard.cpp
 libkey.dll: keyboard.cpp
 	g++ -c -O3 keyboard.cpp -fPIC -o keyboard.o -static
 	g++ -shared -o libkey.dll keyboard.o -static
+libmd5.so: md5.cpp
+	clang++ -c -O3 md5.cpp -fPIC -o md5.o
+	clang++ -shared -o libmd5.so md5.o
+	rm md5.o
+libmd5.dll: md5.cpp
+	g++ -c -O3 md5.cpp -fPIC -o md5.o -static
+	g++ -shared -o libmd5.dll md5.o -static
 clean:
 	rm *.o *.so *.dll *.dylib

module/md5.cpp

@@ -0,0 +1,105 @@
+#include "../nasal.h"
+
+uint32_t strlength;
+uint32_t* add(std::string str)
+{
+    uint32_t num=((str.length()+8)/64)+1;
+    uint32_t *strByte=new uint32_t[num*16];
+    strlength=num*16;
+    for (uint32_t i=0;i<num*16;i++)
+        strByte[i]=0;
+    for (uint32_t i=0;i<str.length();i++)
+        strByte[i>>2]|=(str[i])<<((i%4)*8);
+    strByte[str.length()>>2]|=0x80<<(((str.length()%4))*8);
+    strByte[num*16-2]=str.length()*8;
+    return strByte;
+}
+std::string changeHex(int a)
+{
+    const char str16[]="0123456789abcdef";
+    std::string str="";
+    for(int i=0;i<4;i++)
+    {
+        std::string str1="";
+        int b=((a>>i*8)%(1<<8))&0xff;
+        for (int j = 0; j < 2; j++)
+        {
+            str1.insert(0,1,str16[b%16]);
+            b=b/16;
+        }
+        str+=str1;
+    }
+    return str;
+}
+std::string md5(std::string source)
+{
+    // uint32_t(abs(sin(i+1))*(2pow32))
+    const uint32_t k[]={
+        0xd76aa478,0xe8c7b756,0x242070db,0xc1bdceee,0xf57c0faf,0x4787c62a,0xa8304613,0xfd469501,
+        0x698098d8,0x8b44f7af,0xffff5bb1,0x895cd7be,0x6b901122,0xfd987193,0xa679438e,0x49b40821,
+        0xf61e2562,0xc040b340,0x265e5a51,0xe9b6c7aa,0xd62f105d,0x02441453,0xd8a1e681,0xe7d3fbc8,
+        0x21e1cde6,0xc33707d6,0xf4d50d87,0x455a14ed,0xa9e3e905,0xfcefa3f8,0x676f02d9,0x8d2a4c8a,
+        0xfffa3942,0x8771f681,0x6d9d6122,0xfde5380c,0xa4beea44,0x4bdecfa9,0xf6bb4b60,0xbebfbc70,
+        0x289b7ec6,0xeaa127fa,0xd4ef3085,0x04881d05,0xd9d4d039,0xe6db99e5,0x1fa27cf8,0xc4ac5665,
+        0xf4292244,0x432aff97,0xab9423a7,0xfc93a039,0x655b59c3,0x8f0ccc92,0xffeff47d,0x85845dd1,
+        0x6fa87e4f,0xfe2ce6e0,0xa3014314,0x4e0811a1,0xf7537e82,0xbd3af235,0x2ad7d2bb,0xeb86d391
+    };
+    // left shift
+    const uint32_t s[]={
+        7,12,17,22,7,12,17,22,7,12,17,22,7,12,17,22,
+        5,9,14,20,5,9,14,20,5,9,14,20,5,9,14,20,
+        4,11,16,23,4,11,16,23,4,11,16,23,4,11,16,23,
+        6,10,15,21,6,10,15,21,6,10,15,21,6,10,15,21
+    };
+    // index
+    const uint32_t idx[]={
+        0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, // g=i
+        1,6,11,0,5,10,15,4,9,14,3,8,13,2,7,12, // g=(5*i+1)%16;
+        5,8,11,14,1,4,7,10,13,0,3,6,9,12,15,2, // g=(3*i+5)%16;
+        0,7,14,5,12,3,10,1,8,15,6,13,4,11,2,9  // g=(7*i)%16;
+    };
+    uint32_t atmp=0x67452301,btmp=0xefcdab89;
+    uint32_t ctmp=0x98badcfe,dtmp=0x10325476;
+
+    uint32_t *strByte=add(source);
+#define shift(x,n) (((x)<<(n))|((x)>>(32-(n)))) // cycle left shift
+#define F(x,y,z) (((x)&(y))|((~x)&(z)))    
+#define G(x,y,z) (((x)&(z))|((y)&(~z)))
+#define H(x,y,z) ((x)^(y)^(z))
+#define I(x,y,z) ((y)^((x)|(~z)))
+    for(uint32_t i=0;i<strlength/16;i++)
+    {
+        uint32_t num[16];
+        for(uint32_t j=0;j<16;j++)
+            num[j]=strByte[i*16+j];
+        uint32_t f,g,a=atmp,b=btmp,c=ctmp,d=dtmp;
+        for(uint32_t i=0;i<64;i++)
+        {
+            if(i<16)      f=F(b,c,d);
+            else if(i<32) f=G(b,c,d);
+            else if(i<48) f=H(b,c,d);
+            else          f=I(b,c,d);
+            uint32_t tmp=d;
+            d=c;
+            c=b;
+            b=b+shift((a+f+k[i]+num[idx[i]]),s[i]);
+            a=tmp;
+        }
+        atmp+=a;
+        btmp+=b;
+        ctmp+=c;
+        dtmp+=d;
+    }
+    delete []strByte;
+    return changeHex(atmp).append(changeHex(btmp)).append(changeHex(ctmp)).append(changeHex(dtmp));
+}
+extern "C" nasal_ref nas_md5(std::vector<nasal_ref>& args,nasal_gc& gc){
+    if(!args.size())
+        return builtin_err("md5","lack arguments");
+    nasal_ref str=args[0];
+    if(str.type!=vm_str)
+        return builtin_err("md5","\"str\" must be a string");
+    nasal_ref res=gc.alloc(vm_str);
+    res.str()=md5(str.str());
+    return res;
+}