don't throw an error on empty shapes- those are perfectly normal e.g.

[swftools.git] / lib / bitio.c

diff --git a/lib/bitio.c b/lib/bitio.c
index dde7b7c..133b45e 100644 (file)
--- a/lib/bitio.c
+++ b/lib/bitio.c
@@ -5,42 +5,50 @@
    
    Copyright (c) 2001 Matthias Kramm <kramm@quiss.org> 
 
-   This file is distributed under the GPL, see file COPYING for details */#include <stdio.h>
+   This file is distributed under the GPL, see file COPYING for details */
+#include <stdio.h>
 
 #include <stdlib.h>
 #include <unistd.h>
+#include <memory.h>
 #include <fcntl.h>
-#include <zlib.h>
-#include "./bitio.h"
 
+#include "../config.h"
+
+#ifdef HAVE_ZLIB
+#include <zlib.h>
 #define ZLIB_BUFFER_SIZE 16384
+#endif
+#include "./bitio.h"
 
 struct memread_t
 {
     unsigned char*data;
-    int pos;
     int length;
 };
 
 struct memwrite_t
 {
     unsigned char*data;
-    int pos;
     int length;
 };
 
 struct zlibinflate_t
 {
+#ifdef HAVE_ZLIB
     z_stream zs;
     struct reader_t*input;
     unsigned char readbuffer[ZLIB_BUFFER_SIZE];
+#endif
 };
 
 struct zlibdeflate_t
 {
+#ifdef HAVE_ZLIB
     z_stream zs;
     struct writer_t*output;
     unsigned char writebuffer[ZLIB_BUFFER_SIZE];
+#endif
 };
 
 void reader_resetbits(struct reader_t*r)
@@ -53,7 +61,9 @@ void reader_resetbits(struct reader_t*r)
 static int reader_zlibinflate(struct reader_t*reader, void* data, int len);
 static int reader_fileread(struct reader_t*reader, void* data, int len);
 static int reader_memread(struct reader_t*reader, void* data, int len);
+#ifdef HAVE_ZLIB
 static void zlib_error(int ret, char* msg, z_stream*zs);
+#endif
 
 void reader_init_filereader(struct reader_t*r, int handle)
 {
@@ -62,6 +72,7 @@ void reader_init_filereader(struct reader_t*r, int handle)
     r->type = READER_TYPE_FILE;
     r->mybyte = 0;
     r->bitpos = 8;
+    r->pos = 0;
 }
 
 void reader_init_memreader(struct reader_t*r, void*newdata, int newlength)
@@ -74,10 +85,12 @@ void reader_init_memreader(struct reader_t*r, void*newdata, int newlength)
     r->type = READER_TYPE_MEM;
     r->mybyte = 0;
     r->bitpos = 8;
+    r->pos = 0;
 }
 
 void reader_init_zlibinflate(struct reader_t*r, struct reader_t*input)
 {
+#ifdef HAVE_ZLIB
     struct zlibinflate_t*z;
     int ret;
     memset(r, 0, sizeof(struct reader_t));
@@ -86,6 +99,7 @@ void reader_init_zlibinflate(struct reader_t*r, struct reader_t*input)
     r->internal = z;
     r->read = reader_zlibinflate;
     r->type = READER_TYPE_ZLIB;
+    r->pos = 0;
     z->input = input;
     memset(&z->zs,0,sizeof(z_stream));
     z->zs.zalloc = Z_NULL;
@@ -94,8 +108,12 @@ void reader_init_zlibinflate(struct reader_t*r, struct reader_t*input)
     ret = inflateInit(&z->zs);
     if (ret != Z_OK) zlib_error(ret, "bitio:inflate_init", &z->zs);
     reader_resetbits(r);
+#else
+    fprintf(stderr, "Error: swftools was compiled without zlib support");
+#endif
 }
 
+#ifdef HAVE_ZLIB
 static void zlib_error(int ret, char* msg, z_stream*zs)
 {
     fprintf(stderr, "%s: zlib error (%d): last zlib error: %s\n",
@@ -105,29 +123,34 @@ static void zlib_error(int ret, char* msg, z_stream*zs)
     perror("errno:");
     exit(1);
 }
+#endif
 
 static int reader_fileread(struct reader_t*reader, void* data, int len) 
 {
-    return read((int)reader->internal, data, len);
+    int ret = read((int)reader->internal, data, len);
+    if(ret>=0)
+       reader->pos += ret;
+    return ret;
 }
 
 static int reader_memread(struct reader_t*reader, void* data, int len) 
 {
     struct memread_t*mr = (struct memread_t*)reader->internal;
 
-    if(mr->length - mr->pos > len) {
-       memcpy(data, &mr->data[mr->pos], len);
-       mr->pos += len;
+    if(mr->length - reader->pos > len) {
+       memcpy(data, &mr->data[reader->pos], len);
+       reader->pos += len;
        return len;
     } else {
-       memcpy(data, &mr->data[mr->pos], mr->length - mr->pos);
-       mr->pos = mr->length;
-       return mr->length - mr->pos;
+       memcpy(data, &mr->data[reader->pos], mr->length - reader->pos);
+       reader->pos = mr->length;
+       return mr->length - reader->pos;
     }
 }
 
 static int reader_zlibinflate(struct reader_t*reader, void* data, int len) 
 {
+#ifdef HAVE_ZLIB
     struct zlibinflate_t*z = (struct zlibinflate_t*)reader->internal;
     int ret;
     if(!z)
@@ -155,13 +178,19 @@ static int reader_zlibinflate(struct reader_t*reader, void* data, int len)
                if (ret != Z_OK) zlib_error(ret, "bitio:inflate_end", &z->zs);
                free(reader->internal);
                reader->internal = 0;
+               reader->pos += pos;
                return pos;
        }
        if(!z->zs.avail_out) {
            break;
        }
     }
+    reader->pos += len;
     return len;
+#else
+    fprintf(stderr, "Error: swftools was compiled without zlib support");
+    exit(1);
+#endif
 }
 unsigned int reader_readbit(struct reader_t*r)
 {
@@ -200,14 +229,14 @@ static void writer_filewrite_finish(struct writer_t*w)
 static int writer_memwrite_write(struct writer_t*w, void* data, int len) 
 {
     struct memread_t*mw = (struct memread_t*)w->internal;
-    if(mw->length - mw->pos > len) {
-       memcpy(&mw->data[mw->pos], data, len);
-       mw->pos += len;
+    if(mw->length - w->pos > len) {
+       memcpy(&mw->data[w->pos], data, len);
+       w->pos += len;
        return len;
     } else {
-       memcpy(&mw->data[mw->pos], data, mw->length - mw->pos);
-       mw->pos = mw->length;
-       return mw->length - mw->pos;
+       memcpy(&mw->data[w->pos], data, mw->length - w->pos);
+       w->pos = mw->length;
+       return mw->length - w->pos;
     }
 }
 static void writer_memwrite_finish(struct writer_t*w)
@@ -231,6 +260,7 @@ void writer_init_filewriter(struct writer_t*w, int handle)
     w->type = WRITER_TYPE_FILE;
     w->bitpos = 0;
     w->mybyte = 0;
+    w->pos = 0;
 }
 void writer_init_memwriter(struct writer_t*w, void*data, int len)
 {
@@ -245,10 +275,12 @@ void writer_init_memwriter(struct writer_t*w, void*data, int len)
     w->type = WRITER_TYPE_FILE;
     w->bitpos = 0;
     w->mybyte = 0;
+    w->pos = 0;
 }
 
 void writer_init_zlibdeflate(struct writer_t*w, struct writer_t*output)
 {
+#ifdef HAVE_ZLIB
     struct zlibdeflate_t*z;
     int ret;
     memset(w, 0, sizeof(struct writer_t));
@@ -258,6 +290,7 @@ void writer_init_zlibdeflate(struct writer_t*w, struct writer_t*output)
     w->write = writer_zlibdeflate_write;
     w->finish = writer_zlibdeflate_finish;
     w->type = WRITER_TYPE_ZLIB;
+    w->pos = 0;
     z->output = output;
     memset(&z->zs,0,sizeof(z_stream));
     z->zs.zalloc = Z_NULL;
@@ -269,9 +302,14 @@ void writer_init_zlibdeflate(struct writer_t*w, struct writer_t*output)
     w->mybyte = 0;
     z->zs.next_out = z->writebuffer;
     z->zs.avail_out = ZLIB_BUFFER_SIZE;
+#else
+    fprintf(stderr, "Error: swftools was compiled without zlib support");
+    exit(1);
+#endif
 }
 static int writer_zlibdeflate_write(struct writer_t*writer, void* data, int len) 
 {
+#ifdef HAVE_ZLIB
     struct zlibdeflate_t*z = (struct zlibdeflate_t*)writer->internal;
     int ret;
     if(!z)
@@ -295,10 +333,16 @@ static int writer_zlibdeflate_write(struct writer_t*writer, void* data, int len)
            break;
        }
     }
+    writer->pos += len;
     return len;
+#else
+    fprintf(stderr, "Error: swftools was compiled without zlib support");
+    exit(1);
+#endif
 }
 static void writer_zlibdeflate_finish(struct writer_t*writer)
 {
+#ifdef HAVE_ZLIB
     struct zlibdeflate_t*z = (struct zlibdeflate_t*)writer->internal;
     struct writer_t*output;
     int ret;
@@ -326,6 +370,10 @@ static void writer_zlibdeflate_finish(struct writer_t*writer)
     free(writer->internal);
     writer->internal = 0;
     output->finish(output);
+#else
+    fprintf(stderr, "Error: swftools was compiled without zlib support");
+    exit(1);
+#endif
 }
 
 void writer_writebit(struct writer_t*w, int bit)