Add DynStringInsertWithLen and have DynStringInsert use it

r3062 | dcl | 2011-02-18 11:13:22 +1100 (Fri, 18 Feb 2011) | 1 line

dynstring.c

@@ -178,6 +178,7 @@
     return 1;
  }      
 /*---------------------------------------------------------------------------*/
+#if 0 /* to be removed DFC */
  int DynStringInsert(pDynString self, char *pText, int iPos)
  {
     int iRequested, iRet, iPush, iRest;
@@ -216,6 +217,49 @@
     self->iTextLen = iRequested;
     return 1;
  }    
+/*---------------------------------------------------------------------------*/
+#endif
+ int DynStringInsertWithLen(pDynString self, char *pText, int iPos, int len)
+ {
+    int iRequested, iRet, iPush, iRest;
+    char *pPtr;
+
+    assert(self);
+    assert(self->iMAGIC == DYNMAGIC);
+    
+    /* provide space */
+    iPush = len;
+    iRequested = self->iTextLen + iPush;
+    if(iRequested >= self->iBufferSize) 
+    {
+       iRet = Resize(self,iRequested);
+       if(!iRet)
+       {
+         return 0;
+       }
+    }
+    
+    /* we need a temporary buffer to hold the backend of the string */
+    iRest = self->iTextLen - iPos;
+    pPtr = (char *)malloc((iRest)*sizeof(char));
+    if(!pPtr)
+    {
+      return 0;
+    }
+    memcpy(pPtr, &self->pBuffer[iPos], (iRest)*sizeof(char));
+    
+    /* OK build the result string */
+    memcpy(&self->pBuffer[iPos], pText, len*sizeof(char));
+    memcpy(&self->pBuffer[iPos + len],pPtr, (iRest)*sizeof(char));
+    free(pPtr);
+    self->iTextLen = iRequested;
+    return 1;
+ }    
+/*---------------------------------------------------------------------------*/
+ int DynStringInsert(pDynString self, char *pText, int iPos)
+ {
+    return DynStringInsertWithLen(self, pText, iPos, strlen(pText));
+  }
 /*--------------------------------------------------------------------------*/
  int DynStringReplaceWithLen(pDynString self, char *pText, int iPos, int len)  {
     int iRequested, iRet;

dynstring.h

@@ -94,4 +94,9 @@
    /*
     Useful for making dynstrings containing null chars and other non-Ascii chars
     */
+   
+   int DynStringInsertWithLen(pDynString self, char *pText, int iPos, int len);
+   /*
+    Useful for making dynstrings containing null chars and other non-Ascii chars
+    */
 #endif