fixing compilation warnings

Author: andreagilardoni

Diff for: src/decompress/lzss.cpp

@@ -35,7 +35,7 @@ void lzss_init(
     }
 
     decoder = new LZSSDecoder(
-        [target_file](const uint8_t c) {
+        [](const uint8_t c) {
             fwrite(&c, 1, 1, target_file);
         }
     );
@@ -68,7 +68,7 @@ void lzss_decode() {
  **************************************************************************************/
 
 // get the number of bits the algorithm will try to get given the state
-int LZSSDecoder::bits_required(LZSSDecoder::FSM_STATES s) {
+uint8_t LZSSDecoder::bits_required(LZSSDecoder::FSM_STATES s) {
     switch(s) {
     case FSM_0:
         return 1;
@@ -78,18 +78,20 @@ int LZSSDecoder::bits_required(LZSSDecoder::FSM_STATES s) {
         return EI;
     case FSM_3:
         return EJ;
+    default:
+        return 0;
     }
 }
 
 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) {
+: available(0), state(FSM_0), put_char_cbk(putc_cbk), get_char_cbk(getc_cbk) {
     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(0) {
+: available(0), state(FSM_0), put_char_cbk(putc_cbk), get_char_cbk(nullptr) {
     for (int i = 0; i < N - F; i++) buffer[i] = ' ';
     r = N - F;
 }
@@ -141,6 +143,8 @@ LZSSDecoder::status LZSSDecoder::handle_state() {
 
                 break;
             }
+            case FSM_EOF:
+                break;
         }
     }
 
@@ -162,7 +166,7 @@ LZSSDecoder::status LZSSDecoder::decompress(uint8_t* const buffer, uint32_t size
     return res;
 }
 
-int LZSSDecoder::getbit(int n) { // get n bits from buffer
+int LZSSDecoder::getbit(uint8_t n) { // get n bits from buffer
     int x=0, c;
 
     // if the local bit buffer doesn't have enough bit get them

Diff for: src/decompress/lzss.h

@@ -78,7 +78,7 @@ class LZSSDecoder {
     status handle_state();
 
     // get 1 bit from the available input buffer
-    int getbit(int n);
+    int getbit(uint8_t n);
     // the following 2 are variables used by getbits
     uint32_t buf, buf_size=0;
 
@@ -94,13 +94,13 @@ class LZSSDecoder {
     // there is no documentation about their meaning
     int i, r;
 
-    std::function<void(const uint8_t)> put_char_cbk=nullptr;
-    std::function<uint8_t()> get_char_cbk=nullptr;
+    std::function<void(const uint8_t)> put_char_cbk;
+    std::function<uint8_t()> get_char_cbk;
 
     inline void putc(const uint8_t c) { if(put_char_cbk) { put_char_cbk(c); } }
 
     // get the number of bits the FSM will require given its state
-    int bits_required(FSM_STATES s);
+    uint8_t bits_required(FSM_STATES s);
 };
 
 #endif /* SSU_LZSS_H_ */