X-Git-Url: http://git.asbjorn.biz/?p=swftools.git;a=blobdiff_plain;f=lib%2Fbitio.c;h=e37bf9494d3ec7f74cf1dfa280c0f8c2ca6d07b9;hp=17d92939f6badf583053ac0b4f3d27658be01ad0;hb=3d73649bf0e39778e715a07da902d0a858065a43;hpb=131881aa4c31c77d8ad1b915dbe267760b429573

diff --git a/lib/bitio.c b/lib/bitio.c
index 17d9293..e37bf94 100644
--- a/lib/bitio.c
+++ b/lib/bitio.c
@@ -50,9 +50,14 @@ static void reader_nullread_dealloc(reader_t*r)
 {
     memset(r, 0, sizeof(reader_t));
 }
+static int reader_nullseek(reader_t*r, int pos)
+{
+    return pos;
+}
 void reader_init_nullreader(reader_t*r)
 {
     r->read = reader_nullread;
+    r->seek = reader_nullseek;
     r->dealloc = reader_nullread_dealloc;
     r->internal = 0;
     r->type = READER_TYPE_NULL;
@@ -76,9 +81,14 @@ static void reader_fileread_dealloc(reader_t*r)
     }
     memset(r, 0, sizeof(reader_t));
 }
+static int reader_fileread_seek(reader_t*r, int pos)
+{
+    return lseek((ptroff_t)r->internal, pos, SEEK_SET);
+}
 void reader_init_filereader(reader_t*r, int handle)
 {
     r->read = reader_fileread;
+    r->seek = reader_fileread_seek;
     r->dealloc = reader_fileread_dealloc;
     r->internal = (void*)handle;
     r->type = READER_TYPE_FILE;
@@ -112,10 +122,21 @@ static int reader_memread(reader_t*reader, void* data, int len)
     if(mr->length - reader->pos < len) {
 	len = mr->length - reader->pos;
     }
+    if(!len) return 0;
     memcpy(data, &mr->data[reader->pos], len);
     reader->pos += len;
     return len;
 }
+static int reader_memseek(reader_t*reader, int pos)
+{
+    memread_t*mr = (memread_t*)reader->internal;
+    if(pos>=0 && pos<=mr->length) {
+	reader->pos = pos;
+	return pos;
+    } else {
+	return -1;
+    }
+}
 static void reader_memread_dealloc(reader_t*reader)
 {
     if(reader->internal)
@@ -128,6 +149,7 @@ void reader_init_memreader(reader_t*r, void*newdata, int newlength)
     mr->data = (unsigned char*)newdata;
     mr->length = newlength;
     r->read = reader_memread;
+    r->seek = reader_memseek;
     r->dealloc = reader_memread_dealloc;
     r->internal = (void*)mr;
     r->type = READER_TYPE_MEM;
@@ -136,6 +158,33 @@ void reader_init_memreader(reader_t*r, void*newdata, int newlength)
     r->pos = 0;
 } 
 
+/* ---------------------------- zzip reader ------------------------------ */
+#ifdef HAVE_ZZIP
+static int reader_zzip_read(reader_t*reader, void* data, int len) 
+{
+    return zzip_file_read((ZZIP_FILE*)reader->internal, data, len);
+}
+static void reader_zzip_dealloc(reader_t*reader)
+{
+    memset(reader, 0, sizeof(reader_t));
+}
+static int reader_zzip_seek(reader_t*reader, int pos)
+{
+    return zzip_seek((ZZIP_FILE*)reader->internal, pos, SEEK_SET);
+}
+void reader_init_zzipreader(reader_t*r,ZZIP_FILE*z)
+{
+    r->read = reader_zzip_read;
+    r->seek = reader_zzip_seek;
+    r->dealloc = reader_zzip_dealloc;
+    r->internal = z;
+    r->type = READER_TYPE_ZZIP;
+    r->mybyte = 0;
+    r->bitpos = 8;
+    r->pos = 0;
+}
+#endif
+
 /* ---------------------------- mem writer ------------------------------- */
 
 typedef struct _memwrite
@@ -409,6 +458,11 @@ static int reader_zlibinflate(reader_t*reader, void* data, int len)
     exit(1);
 #endif
 }
+static int reader_zlibseek(reader_t*reader, int pos)
+{
+    fprintf(stderr, "Erro: seeking not supported for zlib streams");
+    return -1;
+}
 static void reader_zlibinflate_dealloc(reader_t*reader)
 {
 #ifdef HAVE_ZLIB
@@ -430,6 +484,7 @@ void reader_init_zlibinflate(reader_t*r, reader_t*input)
     memset(r, 0, sizeof(reader_t));
     r->internal = z;
     r->read = reader_zlibinflate;
+    r->seek = reader_zlibseek;
     r->dealloc = reader_zlibinflate_dealloc;
     r->type = READER_TYPE_ZLIB;
     r->pos = 0;
@@ -695,6 +750,7 @@ U32 reader_readU32(reader_t*r)
 	fprintf(stderr, "bitio.c:reader_readU32: Read over end of memory region\n");
     return b1|b2<<8|b3<<16|b4<<24;
 }
+
 float reader_readFloat(reader_t*r)
 {
     float f;