Initial Commit

rcbasic_build/env_resolve.h

@@ -0,0 +1,64 @@
+#ifndef ENV_RESOLVE_H_INCLUDED
+#define ENV_RESOLVE_H_INCLUDED
+
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
+   #define RC_WINDOWS
+#elif __APPLE__
+    #define RC_MAC
+#elif __linux__
+    #define RC_LINUX
+#endif
+
+#ifdef RC_WINDOWS
+#include <winbase.h>
+#else
+#include <cstdlib>
+#endif // RC_WINDOWS
+
+string rc_intern_env(string v)
+{
+    #ifdef RC_WINDOWS
+    char * val = new char[32767];
+    int n = GetEnvironmentVariable(v.c_str(), val, 32767);
+    string rtn = "";
+    if (n>0)
+        rtn = (string)val;
+    delete val;
+    return rtn;
+    #else
+    char * c = getenv(v.c_str());
+    if(c != NULL)
+        return (string) c;
+    return "";
+    #endif
+}
+
+string resolveEnvironmentVariables(string sdata)
+{
+    string sdata_out = "";
+    for(int i = 0; i < sdata.length(); i++)
+    {
+        if(sdata.substr(i, 2).compare("${")==0)
+        {
+            int end_index = sdata.substr(i+2).find_first_of("}");
+            if(end_index == string::npos)
+            {
+                cout << "Error: Missing closing } in environment variable" << endl;
+                return sdata_out;
+            }
+            string env_var = sdata.substr(i+2).substr(0, end_index);
+            //cout << "env_var is " << env_var << endl;
+            string env_value = rc_intern_env(env_var);
+            sdata_out += env_value;
+            i = (i+2) + end_index;
+            continue;
+        }
+        else
+        {
+            sdata_out += sdata.substr(i, 1);
+        }
+    }
+    return sdata_out;
+}
+
+#endif // ENV_RESOLVE_H_INCLUDED