Diff of /src/dvdread/nav_read.c [ba06be] .. [ea4cd8]  Maximize  Restore

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--- a/src/dvdread/nav_read.c
+++ b/src/dvdread/nav_read.c
@@ -27,103 +27,10 @@
 #include "nav_types.h"
 #include "nav_read.h"
 #include "dvdread_internal.h"
-
-typedef struct {
-  uint8_t *start;
-  uint32_t byte_position;
-  uint32_t bit_position;
-  uint8_t byte;
-} getbits_state_t;
-
-static int getbits_init(getbits_state_t *state, uint8_t *start) {
-  if ((state == NULL) || (start == NULL)) return 0;
-  state->start = start;
-  state->bit_position = 0;
-  state->byte_position = 0;
-  state->byte = start[0];
-  return 1;
-}
-
-/* Non-optimized getbits. */
-/* This can easily be optimized for particular platforms. */
-static uint32_t getbits(getbits_state_t *state, uint32_t number_of_bits) {
-  uint32_t result=0;
-  uint8_t byte=0;
-  if (number_of_bits > 32) {
-    printf("Number of bits > 32 in getbits\n");
-    abort();
-  }
-
-  if ((state->bit_position) > 0) {  /* Last getbits left us in the middle of a byte. */
-    if (number_of_bits > (8-state->bit_position)) { /* this getbits will span 2 or more bytes. */
-      byte = state->byte;
-      byte = byte >> (state->bit_position);
-      result = byte;
-      number_of_bits -= (8-state->bit_position);
-      state->bit_position = 0;
-      state->byte_position++;
-      state->byte = state->start[state->byte_position];
-    } else {
-      byte=state->byte;
-      state->byte = state->byte << number_of_bits;
-      byte = byte >> (8 - number_of_bits);
-      result = byte;
-      state->bit_position += number_of_bits; /* Here it is impossible for bit_position > 8 */
-      if (state->bit_position == 8) {
-        state->bit_position = 0;
-        state->byte_position++;
-        state->byte = state->start[state->byte_position];
-      }
-      number_of_bits = 0;
-    }
-  }
-  if ((state->bit_position) == 0) {
-    while (number_of_bits > 7) {
-      result = (result << 8) + state->byte;
-      state->byte_position++;
-      state->byte = state->start[state->byte_position];
-      number_of_bits -= 8;
-    }
-    if (number_of_bits > 0) { /* number_of_bits < 8 */
-      byte = state->byte;
-      state->byte = state->byte << number_of_bits;
-      state->bit_position += number_of_bits; /* Here it is impossible for bit_position > 7 */
-      byte = byte >> (8 - number_of_bits);
-      result = (result << number_of_bits) + byte;
-      number_of_bits = 0;
-    }
-  }
-
-  return result;
-}
-
-#if 0  /* TODO: optimized versions not yet used */
-
-/* WARNING: This function can only be used on a byte boundary.
-            No checks are made that we are in fact on a byte boundary.
- */
-static uint16_t get16bits(getbits_state_t *state) {
-  uint16_t result;
-  state->byte_position++;
-  result = (state->byte << 8) + state->start[state->byte_position++];
-  state->byte = state->start[state->byte_position];
-  return result;
-}
-
-/* WARNING: This function can only be used on a byte boundary.
-            No checks are made that we are in fact on a byte boundary.
- */
-static uint32_t get32bits(getbits_state_t *state) {
-  uint32_t result;
-  state->byte_position++;
-  result = (state->byte << 8) + state->start[state->byte_position++];
-  result = (result << 8) + state->start[state->byte_position++];
-  result = (result << 8) + state->start[state->byte_position++];
-  state->byte = state->start[state->byte_position];
-  return result;
-}
-
-#endif
+#include "bitreader.h"
+
+#define getbits_init dvdread_getbits_init
+#define getbits dvdread_getbits
 
 void navRead_PCI(pci_t *pci, unsigned char *buffer) {
   int32_t i, j;

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