added get_char_cbk

Author: andreagilardoni

src/decompress/lzss.cpp

@@ -181,6 +181,13 @@ int LZSSDecoder::bits_required(LZSSDecoder::FSM_STATES s) {
     }
 }
 
+LZSSDecoder::LZSSDecoder(std::function<int()> getc_cbk, std::function<void(const uint8_t)> putc_cbk)
+: put_char_cbk(putc_cbk), get_char_cbk(getc_cbk), state(FSM_0), available(0) {
+    for (int i = 0; i < N - F; i++) buffer[i] = ' ';
+    r = N - F;
+}
+
+
 LZSSDecoder::LZSSDecoder(std::function<void(const uint8_t)> putc_cbk)
 : put_char_cbk(putc_cbk), state(FSM_0), available_bits(0) {
     for (int i = 0; i < N - F; i++) buffer[i] = ' ';

src/decompress/lzss.h

@@ -22,10 +22,13 @@ void lzss_flush();
  **************************************************************************************/
 
 
-// TODO improve documentation
 class LZSSDecoder {
 public:
-    LZSSDecoder(std::function<void(const uint8_t)>);
+
+    LZSSDecoder(std::function<void(const uint8_t)> putc_cbk);
+
+    LZSSDecoder(std::function<int()> getc_cbk, std::function<void(const uint8_t)> putc_cbk);
+
     /**
      * this enum describes the result of the computation of a single FSM computation
      * DONE: the decompression is completed
@@ -85,6 +88,7 @@ class LZSSDecoder {
     int i, r;
 
     std::function<void(const uint8_t)> put_char_cbk=nullptr;
+    std::function<void(const uint8_t)> get_char_cbk=nullptr;
 
     inline void putc(const uint8_t c) { if(put_char_cbk) { put_char_cbk(c); } }