add oversampler

oversampling/WDL/filename.h

@@ -0,0 +1,81 @@
+/*
+    WDL - filename.h
+    Copyright (C) 2005 and later, Cockos Incorporated
+  
+    This software is provided 'as-is', without any express or implied
+    warranty.  In no event will the authors be held liable for any damages
+    arising from the use of this software.
+
+    Permission is granted to anyone to use this software for any purpose,
+    including commercial applications, and to alter it and redistribute it
+    freely, subject to the following restrictions:
+
+    1. The origin of this software must not be misrepresented; you must not
+       claim that you wrote the original software. If you use this software
+       in a product, an acknowledgment in the product documentation would be
+       appreciated but is not required.
+    2. Altered source versions must be plainly marked as such, and must not be
+       misrepresented as being the original software.
+    3. This notice may not be removed or altered from any source distribution.
+      
+*/
+
+#ifndef _WDL_FILENAME_H_
+#define _WDL_FILENAME_H_
+
+#include "wdltypes.h"
+
+static WDL_STATICFUNC_UNUSED char WDL_filename_filterchar(char p, char repl='_', bool filterSlashes=true)
+{
+  if (p == '?'  || 
+      p == '*'  ||
+      (p > 0 && p <= 0x1f) ||
+      p == ':'  ||
+      p == '\"' ||
+      p == '|'  ||
+      p == '<'  || 
+      p == '>') 
+  {
+    return repl;
+  }
+
+  if (filterSlashes && (p == '/' || p == '\\' ))
+  {
+    return repl;
+  }
+
+  return p;
+}
+
+static WDL_STATICFUNC_UNUSED void WDL_filename_filterstr(char *rd, char repl='_', int path_filter_mode=1)
+{
+  char *wr, lc = WDL_DIRCHAR;
+  // path_filter_mode:
+  //   0 = remove leading slashes, consolidate duplicate slashes (use when filtering the filepart but allowing subdirectories)
+  //  >0 = filter slashes (use when filtering the filepart, disallowing subdirectories)
+  //  <0 = allow absolute paths, consolidate duplicate slashes (filtering a full path)
+  if (path_filter_mode<0)
+  {
+    #ifdef _WIN32
+      if (rd[0] && rd[1] == ':' && WDL_IS_DIRCHAR(rd[2])) rd += 3;
+      else if (WDL_IS_DIRCHAR(rd[0]) && WDL_IS_DIRCHAR(rd[1])) rd += 2;
+    #else
+      if (WDL_IS_DIRCHAR(*rd)) rd++;
+    #endif
+  }
+  wr = rd;
+  while (*rd)
+  {
+    char r=WDL_filename_filterchar(*rd++,repl,path_filter_mode>0);
+    if (!r || (WDL_IS_DIRCHAR(r) && WDL_IS_DIRCHAR(lc))) continue; // filter multiple slashes in a row, or leading slash
+#ifdef _WIN32
+    if (r == ' ' && WDL_IS_DIRCHAR(lc)) continue; // filter space after slash (problematic on win32, allowed on macOS/linux)
+#endif
+    *wr++ = lc = r;
+  }
+  *wr=0;
+}
+
+
+
+#endif // _WDL_FILENAME_H_