merge minor API changes of IPAddress, Print, Stream and WString from official Arduion core source. LookaheadMode is still under evaluation.

Author: xymopen

STM32F1/cores/maple/IPAddress.cpp

@@ -44,6 +44,48 @@ IPAddress::IPAddress(const uint8_t *address)
     memcpy(_address.bytes, address, sizeof(_address.bytes));
 }
 
+bool IPAddress::fromString(const char *address)
+{
+    // TODO: add support for "a", "a.b", "a.b.c" formats
+
+    uint16_t acc = 0; // Accumulator
+    uint8_t dots = 0;
+
+    while (*address)
+    {
+        char c = *address++;
+        if (c >= '0' && c <= '9')
+        {
+            acc = acc * 10 + (c - '0');
+            if (acc > 255) {
+                // Value out of [0..255] range
+                return false;
+            }
+        }
+        else if (c == '.')
+        {
+            if (dots == 3) {
+                // Too much dots (there must be 3 dots)
+                return false;
+            }
+            _address.bytes[dots++] = acc;
+            acc = 0;
+        }
+        else
+        {
+            // Invalid char
+            return false;
+        }
+    }
+
+    if (dots != 3) {
+        // Too few dots (there must be 3 dots)
+        return false;
+    }
+    _address.bytes[3] = acc;
+    return true;
+}
+
 IPAddress& IPAddress::operator=(const uint8_t *address)
 {
     memcpy(_address.bytes, address, sizeof(_address.bytes));

STM32F1/cores/maple/IPAddress.h

@@ -46,6 +46,9 @@ class IPAddress : public Printable {
     IPAddress(uint32_t address);
     IPAddress(const uint8_t *address);
 
+    bool fromString(const char *address);
+    bool fromString(const String &address) { return fromString(address.c_str()); }
+
     // Overloaded cast operator to allow IPAddress objects to be used where a pointer
     // to a four-byte uint8_t array is expected
     operator uint32_t() const { return _address.dword; };

STM32F1/cores/maple/Print.cpp

@@ -124,6 +124,18 @@ size_t Print::print(double n, int digits) {
     return printFloat(n, digits);
 }
 
+size_t Print::print(const __FlashStringHelper *ifsh)
+{
+  size_t n = print(ifsh);
+  n += println();
+  return n;
+}
+
+size_t Print::print(const Printable& x)
+{
+  return x.printTo(*this);
+}
+
 size_t Print::println(void) 
 {
 	size_t n =  print('\r');
@@ -198,6 +210,20 @@ size_t Print::println(double n, int digits) {
 	return s;
 }
 
+size_t Print::println(const __FlashStringHelper *ifsh)
+{
+  size_t n = print(ifsh);
+  n += println();
+  return n;
+}
+
+size_t Print::println(const Printable& x)
+{
+  size_t n = print(x);
+  n += println();
+  return n;
+}
+
 #ifdef SUPPORTS_PRINTF
 #include <stdio.h>
 #include <stdarg.h>

STM32F1/cores/maple/Print.h

@@ -25,6 +25,7 @@
 
 #include <libmaple/libmaple_types.h>
 #include "WString.h"
+#include "Printable.h"
 
 enum {
     BYTE = 0,
@@ -51,6 +52,8 @@ class Print {
     size_t print(long long, int=DEC);
     size_t print(unsigned long long, int=DEC);
     size_t print(double, int=2);
+    size_t print(const __FlashStringHelper *);
+    size_t print(const Printable&);
     size_t println(void);
 	size_t println(const String &s);
 	size_t println(char);
@@ -63,6 +66,8 @@ class Print {
     size_t println(long long, int=DEC);
     size_t println(unsigned long long, int=DEC);
     size_t println(double, int=2);
+    size_t println(const __FlashStringHelper *);
+    size_t println(const Printable&);
 #ifdef SUPPORTS_PRINTF
 // Roger Clark. Work in progress to add printf support
 	int printf(const char * format, ...);

STM32F1/cores/maple/Stream.cpp

@@ -268,3 +268,68 @@ String Stream::readStringUntil(char terminator)
   return ret;
 }
 
+
+int Stream::findMulti( struct Stream::MultiTarget *targets, int tCount) {
+  // any zero length target string automatically matches and would make
+  // a mess of the rest of the algorithm.
+  for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+    if (t->len <= 0)
+      return t - targets;
+  }
+
+  while (1) {
+    int c = timedRead();
+    if (c < 0)
+      return -1;
+
+    for (struct MultiTarget *t = targets; t < targets+tCount; ++t) {
+      // the simple case is if we match, deal with that first.
+      if (c == t->str[t->index]) {
+        if (++t->index == t->len)
+          return t - targets;
+        else
+          continue;
+      }
+
+      // if not we need to walk back and see if we could have matched further
+      // down the stream (ie '1112' doesn't match the first position in '11112'
+      // but it will match the second position so we can't just reset the current
+      // index to 0 when we find a mismatch.
+      if (t->index == 0)
+        continue;
+
+      int origIndex = t->index;
+      do {
+        --t->index;
+        // first check if current char works against the new current index
+        if (c != t->str[t->index])
+          continue;
+
+        // if it's the only char then we're good, nothing more to check
+        if (t->index == 0) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we need to check the rest of the found string
+        int diff = origIndex - t->index;
+        size_t i;
+        for (i = 0; i < t->index; ++i) {
+          if (t->str[i] != t->str[i + diff])
+            break;
+        }
+
+        // if we successfully got through the previous loop then our current
+        // index is good.
+        if (i == t->index) {
+          t->index++;
+          break;
+        }
+
+        // otherwise we just try the next index
+      } while (t->index);
+    }
+  }
+  // unreachable
+  return -1;
+}

STM32F1/cores/maple/Stream.h

@@ -55,6 +55,7 @@ class Stream : public Print
 // parsing methods
 
   void setTimeout(unsigned long timeout);  // sets maximum milliseconds to wait for stream data, default is 1 second
+  unsigned long getTimeout(void) { return _timeout; }
 
   bool find(char *target);   // reads data from the stream until the target string is found
   bool find(uint8_t *target) { return find ((char *)target); }
@@ -64,6 +65,8 @@ class Stream : public Print
   bool find(uint8_t *target, size_t length) { return find ((char *)target, length); }
   // returns true if target string is found, false if timed out
 
+  bool find(char target) { return find (&target, 1); }
+
   bool findUntil(char *target, char *terminator);   // as find but search ends if the terminator string is found
   bool findUntil(uint8_t *target, char *terminator) { return findUntil((char *)target, terminator); }
 
@@ -97,6 +100,16 @@ class Stream : public Print
   // this allows format characters (typically commas) in values to be ignored
 
   float parseFloat(char skipChar);  // as above but the given skipChar is ignored
+
+  struct MultiTarget {
+    const char *str;  // string you're searching for
+    size_t len;       // length of string you're searching for
+    size_t index;     // index used by the search routine.
+  };
+
+  // This allows you to search for an arbitrary number of strings.
+  // Returns index of the target that is found first or -1 if timeout occurs.
+  int findMulti(struct MultiTarget *targets, int tCount);
 };
 
 #endif

STM32F1/cores/maple/WString.cpp

@@ -195,7 +195,7 @@ String & String::copy(const __FlashStringHelper *pstr, unsigned int length)
 void String::move(String &rhs)
 {
 	if (buffer) {
-		if (capacity >= rhs.len) {
+		if (rhs && capacity >= rhs.len) {
 			strcpy(buffer, rhs.buffer);
 			len = rhs.len;
 			rhs.len = 0;

STM32F1/cores/maple/WString.h

@@ -161,6 +161,10 @@ class String
 	void toCharArray(char *buf, unsigned int bufsize, unsigned int index=0) const
 		{getBytes((unsigned char *)buf, bufsize, index);}
 	const char * c_str() const { return buffer; }
+	char* begin() { return buffer; }
+	char* end() { return buffer + length(); }
+	const char* begin() const { return c_str(); }
+	const char* end() const { return c_str() + length(); }
 
 	// search
 	int indexOf( char ch ) const;

STM32F4/cores/maple/IPAddress.cpp

@@ -44,6 +44,48 @@ IPAddress::IPAddress(const uint8_t *address)
     memcpy(_address.bytes, address, sizeof(_address.bytes));
 }
 
+bool IPAddress::fromString(const char *address)
+{
+    // TODO: add support for "a", "a.b", "a.b.c" formats
+
+    uint16_t acc = 0; // Accumulator
+    uint8_t dots = 0;
+
+    while (*address)
+    {
+        char c = *address++;
+        if (c >= '0' && c <= '9')
+        {
+            acc = acc * 10 + (c - '0');
+            if (acc > 255) {
+                // Value out of [0..255] range
+                return false;
+            }
+        }
+        else if (c == '.')
+        {
+            if (dots == 3) {
+                // Too much dots (there must be 3 dots)
+                return false;
+            }
+            _address.bytes[dots++] = acc;
+            acc = 0;
+        }
+        else
+        {
+            // Invalid char
+            return false;
+        }
+    }
+
+    if (dots != 3) {
+        // Too few dots (there must be 3 dots)
+        return false;
+    }
+    _address.bytes[3] = acc;
+    return true;
+}
+
 IPAddress& IPAddress::operator=(const uint8_t *address)
 {
     memcpy(_address.bytes, address, sizeof(_address.bytes));

STM32F4/cores/maple/IPAddress.h

@@ -46,6 +46,9 @@ class IPAddress : public Printable {
     IPAddress(uint32_t address);
     IPAddress(const uint8_t *address);
 
+    bool fromString(const char *address);
+    bool fromString(const String &address) { return fromString(address.c_str()); }
+
     // Overloaded cast operator to allow IPAddress objects to be used where a pointer
     // to a four-byte uint8_t array is expected
     operator uint32_t() const { return _address.dword; };