Refactoring & code clean-up.

- utility functions
- network functions
- math functions

wled00/util.cpp

@@ -0,0 +1,131 @@
+#include "wled.h"
+#include "fcn_declare.h"
+#include "const.h"
+
+
+//append a numeric setting to string buffer
+void sappend(char stype, const char* key, int val)
+{
+  char ds[] = "d.Sf.";
+
+  switch(stype)
+  {
+    case 'c': //checkbox
+      oappend(ds);
+      oappend(key);
+      oappend(".checked=");
+      oappendi(val);
+      oappend(";");
+      break;
+    case 'v': //numeric
+      oappend(ds);
+      oappend(key);
+      oappend(".value=");
+      oappendi(val);
+      oappend(";");
+      break;
+    case 'i': //selectedIndex
+      oappend(ds);
+      oappend(key);
+      oappend(SET_F(".selectedIndex="));
+      oappendi(val);
+      oappend(";");
+      break;
+  }
+}
+
+
+//append a string setting to buffer
+void sappends(char stype, const char* key, char* val)
+{
+  switch(stype)
+  {
+    case 's': {//string (we can interpret val as char*)
+      String buf = val;
+      //convert "%" to "%%" to make EspAsyncWebServer happy
+      buf.replace("%","%%");
+      oappend("d.Sf.");
+      oappend(key);
+      oappend(".value=\"");
+      oappend(buf.c_str());
+      oappend("\";");
+      break;}
+    case 'm': //message
+      oappend(SET_F("d.getElementsByClassName"));
+      oappend(key);
+      oappend(SET_F(".innerHTML=\""));
+      oappend(val);
+      oappend("\";");
+      break;
+  }
+}
+
+
+bool oappendi(int i)
+{
+  char s[11];
+  sprintf(s, "%d", i);
+  return oappend(s);
+}
+
+
+bool oappend(const char* txt)
+{
+  uint16_t len = strlen(txt);
+  if (olen + len >= OMAX)
+    return false;        // buffer full
+  strcpy(obuf + olen, txt);
+  olen += len;
+  return true;
+}
+
+
+void prepareHostname(char* hostname)
+{
+  const char *pC = serverDescription;
+  uint8_t pos = 5;
+
+  while (*pC && pos < 24) { // while !null and not over length
+    if (isalnum(*pC)) {     // if the current char is alpha-numeric append it to the hostname
+      hostname[pos] = *pC;
+      pos++;
+    } else if (*pC == ' ' || *pC == '_' || *pC == '-' || *pC == '+' || *pC == '!' || *pC == '?' || *pC == '*') {
+      hostname[pos] = '-';
+      pos++;
+    }
+      // else do nothing - no leading hyphens and do not include hyphens for all other characters.
+      pC++;
+    }
+    // if the hostname is left blank, use the mac address/default mdns name
+    if (pos < 6) {
+      sprintf(hostname + 5, "%*s", 6, escapedMac.c_str() + 6);
+    } else { //last character must not be hyphen
+      while (pos > 0 && hostname[pos -1] == '-') {
+        hostname[pos -1] = 0;
+        pos--;
+      }
+    }
+}
+
+
+void _setRandomColor(bool _sec, bool fromButton)
+{
+  lastRandomIndex = strip.get_random_wheel_index(lastRandomIndex);
+  if (_sec){
+    colorHStoRGB(lastRandomIndex*256,255,colSec);
+  } else {
+    colorHStoRGB(lastRandomIndex*256,255,col);
+  }
+  if (fromButton) colorUpdated(2);
+}
+
+
+bool isAsterisksOnly(const char* str, byte maxLen)
+{
+  for (byte i = 0; i < maxLen; i++) {
+    if (str[i] == 0) break;
+    if (str[i] != '*') return false;
+  }
+  //at this point the password contains asterisks only
+  return (str[0] != 0); //false on empty string
+}