cwText.h/cpp : Added textAppend() and textJoin().

cwText.cpp

@@ -30,7 +30,23 @@ namespace cw
 
     return eosFl ? s : nullptr;
   }
+  /*
+  unsigned _toText( char* buf, unsigned bufN, unsigned char v )
+  {
+    if( bufN < 1 )
+      return 0;
+    buf[0] = v;
+    return 1;
+  }
 
+  unsigned _toText( char* buf, unsigned bufN, char v )
+  {
+    if( bufN < 1 )
+      return 0;
+    buf[0] = v;
+    return 1;
+  }
+  */
   
 }
 
@@ -71,22 +87,37 @@ const char* cw::nextNonWhiteCharEOS( const char* s )
 { return _nextNonWhiteChar(s,true); }
 
 
-unsigned toText( char* buf, unsigned bufN, unsigned char v )
+char* cw::textJoin( const char* s0, const char* s1 )
 {
-  if( bufN < 1 )
+  if( s0 == nullptr && s1 == nullptr )
-    return 0;
+    return nullptr;
-  buf[0] = v;
+  
-  return 1;
+  unsigned s0n = textLength(s0);
+  unsigned s1n = textLength(s1);
+  unsigned sn  = s0n + s1n + 1;
+
+  char* s = mem::alloc<char>(sn+1);
+  s[0] = 0;
+  
+  if( s0 != nullptr )
+    strcpy(s,mem::duplStr(s0));
+
+  if( s0 != nullptr && s1 != nullptr )
+    strcpy(s + strlen(s0), mem::duplStr(s1) );
+
+  return s;
 }
 
-unsigned toText( char* buf, unsigned bufN, char v )
+char* cw::textAppend( char* s0,  const char* s1 )
 {
-  if( bufN < 1 )
+  if( s0 == nullptr && s1==nullptr)
-    return 0;
+    return nullptr;
-  buf[0] = v;
+
-  return 1;
+  return mem::appendStr(s0,s1);
 }
 
+
+
 unsigned cw::toText( char* buf, unsigned bufN, bool v )
 { return toText( buf, bufN, v ? "true" : "false" );  }
 

cwText.h

@@ -30,7 +30,12 @@ namespace cw
   // or nullptr if 's' is null.
   const char* nextNonWhiteCharEOS( const char* s );
 
+  // Join s0 and s1 to form one long string.  Release the returned string with mem::free()
+  char* textJoin( const char* s0, const char* s1 );
 
+  // Realloc s0 and append s1.
+  char* textAppend( char* s0, const char* s1 );
+  
   unsigned toText( char* buf, unsigned bufN, bool v );
   unsigned toText( char* buf, unsigned bufN, unsigned char v );
   unsigned toText( char* buf, unsigned bufN, char v );