1 files changed, 77 insertions, 0 deletions
diff --git a/src/core_read.cpp b/src/core_read.cpp
index 937dcd9c12..d5d3cca480 100644
--- a/src/core_read.cpp
+++ b/src/core_read.cpp
@@ -3,8 +3,85 @@
 #include "core_io.h"
 #include "core.h"
 #include "serialize.h"
+#include "script.h"
+
+#include <boost/assign/list_of.hpp>
+#include <boost/algorithm/string/classification.hpp>
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/algorithm/string/split.hpp>
+#include <boost/algorithm/string/replace.hpp>
 
 using namespace std;
+using namespace boost;
+using namespace boost::algorithm;
+
+CScript ParseScript(std::string s)
+{
+    CScript result;
+
+    static map<string, opcodetype> mapOpNames;
+
+    if (mapOpNames.size() == 0)
+    {
+        for (int op = 0; op <= OP_NOP10; op++)
+        {
+            // Allow OP_RESERVED to get into mapOpNames
+            if (op < OP_NOP && op != OP_RESERVED)
+                continue;
+
+            const char* name = GetOpName((opcodetype)op);
+            if (strcmp(name, "OP_UNKNOWN") == 0)
+                continue;
+            string strName(name);
+            mapOpNames[strName] = (opcodetype)op;
+            // Convenience: OP_ADD and just ADD are both recognized:
+            replace_first(strName, "OP_", "");
+            mapOpNames[strName] = (opcodetype)op;
+        }
+    }
+
+    vector<string> words;
+    split(words, s, is_any_of(" \t\n"), token_compress_on);
+
+    BOOST_FOREACH(string w, words)
+    {
+        if (w.size() == 0)
+        {
+            // Empty string, ignore. (boost::split given '' will return one word)
+        }
+        else if (all(w, is_digit()) ||
+            (starts_with(w, "-") && all(string(w.begin()+1, w.end()), is_digit())))
+        {
+            // Number
+            int64_t n = atoi64(w);
+            result << n;
+        }
+        else if (starts_with(w, "0x") && IsHex(string(w.begin()+2, w.end())))
+        {
+            // Raw hex data, inserted NOT pushed onto stack:
+            std::vector<unsigned char> raw = ParseHex(string(w.begin()+2, w.end()));
+            result.insert(result.end(), raw.begin(), raw.end());
+        }
+        else if (w.size() >= 2 && starts_with(w, "'") && ends_with(w, "'"))
+        {
+            // Single-quoted string, pushed as data. NOTE: this is poor-man's
+            // parsing, spaces/tabs/newlines in single-quoted strings won't work.
+            std::vector<unsigned char> value(w.begin()+1, w.end()-1);
+            result << value;
+        }
+        else if (mapOpNames.count(w))
+        {
+            // opcode, e.g. OP_ADD or ADD:
+            result << mapOpNames[w];
+        }
+        else
+        {
+            throw runtime_error("script parse error");
+        }
+    }
+
+    return result;
+}
 
 bool DecodeHexTx(CTransaction& tx, const std::string& strHexTx)
 {