X-Git-Url: http://git.asbjorn.biz/?p=swftools.git;a=blobdiff_plain;f=lib%2Fbitio.c;h=bd549359daac3a1bec7914cbaef29db1f4f25c2e;hp=26d89c1f62b3c9949eedda79ab93afaaa4f6a81e;hb=bf04757cd94e94c1f67fa3d2a4e3e59fa5bce0c0;hpb=b07b8b258d68469c0037cad8ac54f298311c6b0e

diff --git a/lib/bitio.c b/lib/bitio.c
index 26d89c1..bd54935 100644
--- a/lib/bitio.c
+++ b/lib/bitio.c
@@ -20,7 +20,13 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#ifdef HAVE_UNISTD_H
 #include <unistd.h>
+#endif
+#ifdef HAVE_IO_H
+#include <io.h>
+#endif
+#include <string.h>
 #include <memory.h>
 #include <fcntl.h>
 
@@ -34,16 +40,16 @@
 
 /* ---------------------------- null reader ------------------------------- */
 
-static int reader_nullread(struct reader_t*r, void* data, int len) 
+static int reader_nullread(reader_t*r, void* data, int len) 
 {
     memset(data, 0, len);
     return len;
 }
-static void reader_nullread_dealloc(struct reader_t*r)
+static void reader_nullread_dealloc(reader_t*r)
 {
-    memset(r, 0, sizeof(struct reader_t));
+    memset(r, 0, sizeof(reader_t));
 }
-void reader_init_nullreader(struct reader_t*r)
+void reader_init_nullreader(reader_t*r)
 {
     r->read = reader_nullread;
     r->dealloc = reader_nullread_dealloc;
@@ -55,14 +61,14 @@ void reader_init_nullreader(struct reader_t*r)
 }
 /* ---------------------------- file reader ------------------------------- */
 
-static int reader_fileread(struct reader_t*reader, void* data, int len) 
+static int reader_fileread(reader_t*reader, void* data, int len) 
 {
     int ret = read((int)reader->internal, data, len);
     if(ret>=0)
 	reader->pos += ret;
     return ret;
 }
-void reader_init_filereader(struct reader_t*r, int handle)
+void reader_init_filereader(reader_t*r, int handle)
 {
     r->read = reader_fileread;
     r->internal = (void*)handle;
@@ -74,35 +80,33 @@ void reader_init_filereader(struct reader_t*r, int handle)
 
 /* ---------------------------- mem reader ------------------------------- */
 
-struct memread_t
+typedef struct _memread
 {
     unsigned char*data;
     int length;
-};
-static int reader_memread(struct reader_t*reader, void* data, int len) 
+} memread_t;
+
+static int reader_memread(reader_t*reader, void* data, int len) 
 {
-    struct memread_t*mr = (struct memread_t*)reader->internal;
+    memread_t*mr = (memread_t*)reader->internal;
 
-    if(mr->length - reader->pos > len) {
-	memcpy(data, &mr->data[reader->pos], len);
-	reader->pos += len;
-	return len;
-    } else {
-	memcpy(data, &mr->data[reader->pos], mr->length - reader->pos);
-	reader->pos = mr->length;
-	return mr->length - reader->pos;
+    if(mr->length - reader->pos < len) {
+	len = mr->length - reader->pos;
     }
+    memcpy(data, &mr->data[reader->pos], len);
+    reader->pos += len;
+    return len;
 }
-static void reader_memread_dealloc(struct reader_t*reader)
+static void reader_memread_dealloc(reader_t*reader)
 {
     if(reader->internal)
 	free(reader->internal);
-    memset(reader, 0, sizeof(struct reader_t));
+    memset(reader, 0, sizeof(reader_t));
 }
-void reader_init_memreader(struct reader_t*r, void*newdata, int newlength)
+void reader_init_memreader(reader_t*r, void*newdata, int newlength)
 {
-    struct memread_t*mr = malloc(sizeof(struct memread_t));
-    mr->data = newdata;
+    memread_t*mr = (memread_t*)malloc(sizeof(memread_t));
+    mr->data = (unsigned char*)newdata;
     mr->length = newlength;
     r->read = reader_memread;
     r->dealloc = reader_memread_dealloc;
@@ -115,15 +119,15 @@ void reader_init_memreader(struct reader_t*r, void*newdata, int newlength)
 
 /* ---------------------------- mem writer ------------------------------- */
 
-struct memwrite_t
+typedef struct _memwrite
 {
     unsigned char*data;
     int length;
-};
+} memwrite_t;
 
-static int writer_memwrite_write(struct writer_t*w, void* data, int len) 
+static int writer_memwrite_write(writer_t*w, void* data, int len) 
 {
-    struct memwrite_t*mw = (struct memwrite_t*)w->internal;
+    memwrite_t*mw = (memwrite_t*)w->internal;
     if(mw->length - w->pos > len) {
 	memcpy(&mw->data[w->pos], data, len);
 	w->pos += len;
@@ -134,20 +138,24 @@ static int writer_memwrite_write(struct writer_t*w, void* data, int len)
 	return mw->length - w->pos;
     }
 }
-static void writer_memwrite_finish(struct writer_t*w)
+static void writer_memwrite_finish(writer_t*w)
 {
     if(w->internal) 
 	free(w->internal);
     w->internal = 0;
 }
-void writer_init_memwriter(struct writer_t*w, void*data, int len)
+static void dummy_flush(writer_t*w)
+{
+}
+void writer_init_memwriter(writer_t*w, void*data, int len)
 {
-    struct memwrite_t *mr;
-    mr = malloc(sizeof(struct memwrite_t));
-    mr->data = data;
+    memwrite_t *mr;
+    mr = (memwrite_t*)malloc(sizeof(memwrite_t));
+    mr->data = (unsigned char *)data;
     mr->length = len;
-    memset(w, 0, sizeof(struct writer_t));
+    memset(w, 0, sizeof(writer_t));
     w->write = writer_memwrite_write;
+    w->flush = dummy_flush;
     w->finish = writer_memwrite_finish;
     w->internal = (void*)mr;
     w->type = WRITER_TYPE_MEM;
@@ -158,47 +166,59 @@ void writer_init_memwriter(struct writer_t*w, void*data, int len)
 
 /* ------------------------- growing mem writer ------------------------------- */
 
-struct growmemwrite_t
+typedef struct _growmemwrite
 {
     unsigned char*data;
     int length;
-};
-static int writer_growmemwrite_write(struct writer_t*w, void* data, int len) 
+    U32 grow;
+} growmemwrite_t;
+static int writer_growmemwrite_write(writer_t*w, void* data, int len) 
 {
-    struct growmemwrite_t*mw = (struct growmemwrite_t*)w->internal;
+    growmemwrite_t*mw = (growmemwrite_t*)w->internal;
     if(!mw->data) {
 	fprintf(stderr, "Illegal write operation: data already given away");
 	exit(1);
     }
-    if(mw->length - w->pos <= len) {
-	unsigned char*newmem;
+    if(mw->length - w->pos < len) {
 	int newlength = mw->length;
 	while(newlength - w->pos < len) {
-	    newlength += 4096;
+	    newlength += mw->grow;
 	}
-	newmem = malloc(newlength);
+#ifdef NO_REALLOC
+	unsigned char*newmem = (unsigned char*)malloc(newlength);
 	memcpy(newmem, mw->data, mw->length);
 	free(mw->data);
 	mw->data = newmem;
+#else
+	mw->data = (unsigned char*)realloc(mw->data, newlength);
+#endif
 	mw->length = newlength;
     }
     memcpy(&mw->data[w->pos], data, len);
     w->pos += len;
     return len;
 }
-static void writer_growmemwrite_finish(struct writer_t*w)
+static void writer_growmemwrite_finish(writer_t*w)
 {
-    struct growmemwrite_t*mw = (struct growmemwrite_t*)w->internal;
-    if(mw->data)
-	free(mw->data);
-    mw->data = 0;
+    growmemwrite_t*mw = (growmemwrite_t*)w->internal;
+    if(mw->data) {
+	free(mw->data);mw->data = 0;
+    }
     mw->length = 0;
     free(w->internal);mw=0;
-    memset(w, 0, sizeof(struct writer_t));
+    memset(w, 0, sizeof(writer_t));
 }
-void* writer_growmemwrite_getmem(struct writer_t*w)
+void* writer_growmemwrite_memptr(writer_t*w, int*len)
 {
-    struct growmemwrite_t*mw = (struct growmemwrite_t*)w->internal;
+    growmemwrite_t*mw = (growmemwrite_t*)w->internal;
+    if(len) {
+	*len = w->pos;
+    }
+    return mw->data;
+}
+void* writer_growmemwrite_getmem(writer_t*w)
+{
+    growmemwrite_t*mw = (growmemwrite_t*)w->internal;
     void*ret = mw->data;
     /* remove own reference so that neither write() nor finish() can free it.
        It's property of the caller now.
@@ -206,16 +226,24 @@ void* writer_growmemwrite_getmem(struct writer_t*w)
     mw->data = 0;
     return ret;
 }
-void writer_init_growingmemwriter(struct writer_t*w)
+void writer_growmemwrite_reset(writer_t*w)
+{
+    growmemwrite_t*mw = (growmemwrite_t*)w->internal;
+    w->pos = 0;
+    w->bitpos = 0;
+    w->mybyte = 0;
+}
+void writer_init_growingmemwriter(writer_t*w, U32 grow)
 {
-    struct memwrite_t *mr;
-    mr = malloc(sizeof(struct memwrite_t));
-    mr->length = 4096;
-    mr->data = malloc(mr->length);
-    memset(w, 0, sizeof(struct writer_t));
+    growmemwrite_t *mw = (growmemwrite_t *)malloc(sizeof(growmemwrite_t));
+    mw->length = 4096;
+    mw->data = (unsigned char *)malloc(mw->length);
+    mw->grow = grow;
+    memset(w, 0, sizeof(writer_t));
     w->write = writer_growmemwrite_write;
+    w->flush = dummy_flush;
     w->finish = writer_growmemwrite_finish;
-    w->internal = (void*)mr;
+    w->internal = (void*)mw;
     w->type = WRITER_TYPE_GROWING_MEM;
     w->bitpos = 0;
     w->mybyte = 0;
@@ -224,31 +252,32 @@ void writer_init_growingmemwriter(struct writer_t*w)
 
 /* ---------------------------- file writer ------------------------------- */
 
-struct filewrite_t
+typedef struct _filewrite
 {
     int handle;
     char free_handle;
-};
+} filewrite_t;
 
-static int writer_filewrite_write(struct writer_t*w, void* data, int len) 
+static int writer_filewrite_write(writer_t*w, void* data, int len) 
 {
-    struct filewrite_t * fw= (struct filewrite_t*)w->internal;
+    filewrite_t * fw= (filewrite_t*)w->internal;
+    w->pos += len;
     return write(fw->handle, data, len);
 }
-static void writer_filewrite_finish(struct writer_t*w)
+static void writer_filewrite_finish(writer_t*w)
 {
-    struct filewrite_t *mr = (struct filewrite_t*)w->internal;
+    filewrite_t *mr = (filewrite_t*)w->internal;
     if(mr->free_handle)
 	close(mr->handle);
     free(w->internal);
-    memset(w, 0, sizeof(struct writer_t));
+    memset(w, 0, sizeof(writer_t));
 }
-void writer_init_filewriter(struct writer_t*w, int handle)
+void writer_init_filewriter(writer_t*w, int handle)
 {
-    struct filewrite_t *mr = malloc(sizeof(struct filewrite_t));
+    filewrite_t *mr = (filewrite_t *)malloc(sizeof(filewrite_t));
     mr->handle = handle;
     mr->free_handle = 0;
-    memset(w, 0, sizeof(struct writer_t));
+    memset(w, 0, sizeof(writer_t));
     w->write = writer_filewrite_write;
     w->finish = writer_filewrite_finish;
     w->internal = mr;
@@ -257,7 +286,7 @@ void writer_init_filewriter(struct writer_t*w, int handle)
     w->mybyte = 0;
     w->pos = 0;
 }
-void writer_init_filewriter2(struct writer_t*w, char*filename)
+void writer_init_filewriter2(writer_t*w, char*filename)
 {
     int fi = open("movie.swf",
 #ifdef O_BINARY
@@ -265,24 +294,25 @@ void writer_init_filewriter2(struct writer_t*w, char*filename)
 #endif
 	    O_WRONLY|O_CREAT|O_TRUNC, 0644);
     writer_init_filewriter(w, fi);
-    ((struct filewrite_t*)w->internal)->free_handle = 1;
+    ((filewrite_t*)w->internal)->free_handle = 1;
 }
 
 /* ---------------------------- null writer ------------------------------- */
 
-static int writer_nullwrite_write(struct writer_t*w, void* data, int len) 
+static int writer_nullwrite_write(writer_t*w, void* data, int len) 
 {
     w->pos += len;
     return len;
 }
-static void writer_nullwrite_finish(struct writer_t*w)
+static void writer_nullwrite_finish(writer_t*w)
 {
-    memset(w, 0, sizeof(struct writer_t));
+    memset(w, 0, sizeof(writer_t));
 }
-void writer_init_nullwriter(struct writer_t*w)
+void writer_init_nullwriter(writer_t*w)
 {
-    memset(w, 0, sizeof(struct writer_t));
+    memset(w, 0, sizeof(writer_t));
     w->write = writer_nullwrite_write;
+    w->flush = dummy_flush;
     w->finish = writer_nullwrite_finish;
     w->internal = 0;
     w->type = WRITER_TYPE_NULL;
@@ -292,14 +322,14 @@ void writer_init_nullwriter(struct writer_t*w)
 }
 /* ---------------------------- zlibinflate reader -------------------------- */
 
-struct zlibinflate_t
+typedef struct _zlibinflate
 {
 #ifdef HAVE_ZLIB
     z_stream zs;
-    struct reader_t*input;
+    reader_t*input;
     unsigned char readbuffer[ZLIB_BUFFER_SIZE];
 #endif
-};
+} zlibinflate_t;
 
 #ifdef HAVE_ZLIB
 static void zlib_error(int ret, char* msg, z_stream*zs)
@@ -313,10 +343,10 @@ static void zlib_error(int ret, char* msg, z_stream*zs)
 }
 #endif
 
-static int reader_zlibinflate(struct reader_t*reader, void* data, int len) 
+static int reader_zlibinflate(reader_t*reader, void* data, int len) 
 {
 #ifdef HAVE_ZLIB
-    struct zlibinflate_t*z = (struct zlibinflate_t*)reader->internal;
+    zlibinflate_t*z = (zlibinflate_t*)reader->internal;
     int ret;
     if(!z) {
 	return 0;
@@ -324,7 +354,7 @@ static int reader_zlibinflate(struct reader_t*reader, void* data, int len)
     if(!len)
 	return 0;
     
-    z->zs.next_out = data;
+    z->zs.next_out = (Bytef *)data;
     z->zs.avail_out = len;
 
     while(1) {
@@ -360,26 +390,25 @@ static int reader_zlibinflate(struct reader_t*reader, void* data, int len)
     exit(1);
 #endif
 }
-static void reader_zlibinflate_dealloc(struct reader_t*reader)
+static void reader_zlibinflate_dealloc(reader_t*reader)
 {
 #ifdef HAVE_ZLIB
-    struct zlibinflate_t*z = (struct zlibinflate_t*)reader->internal;
+    zlibinflate_t*z = (zlibinflate_t*)reader->internal;
     /* test whether read() already did basic deallocation */
     if(reader->internal) {
 	inflateEnd(&z->zs);
 	free(reader->internal);
     }
-    memset(reader, 0, sizeof(struct reader_t));
+    memset(reader, 0, sizeof(reader_t));
 #endif
 }
-void reader_init_zlibinflate(struct reader_t*r, struct reader_t*input)
+void reader_init_zlibinflate(reader_t*r, reader_t*input)
 {
 #ifdef HAVE_ZLIB
-    struct zlibinflate_t*z;
+    zlibinflate_t*z = (zlibinflate_t*)malloc(sizeof(zlibinflate_t));
+    memset(z, 0, sizeof(zlibinflate_t));
     int ret;
-    memset(r, 0, sizeof(struct reader_t));
-    z = (struct zlibinflate_t*)malloc(sizeof(struct zlibinflate_t));
-    memset(z, 0, sizeof(struct zlibinflate_t));
+    memset(r, 0, sizeof(reader_t));
     r->internal = z;
     r->read = reader_zlibinflate;
     r->dealloc = reader_zlibinflate_dealloc;
@@ -395,24 +424,25 @@ void reader_init_zlibinflate(struct reader_t*r, struct reader_t*input)
     reader_resetbits(r);
 #else
     fprintf(stderr, "Error: swftools was compiled without zlib support");
+    exit(1);
 #endif
 }
 
 /* ---------------------------- zlibdeflate writer -------------------------- */
 
-struct zlibdeflate_t
+typedef struct _zlibdeflate
 {
 #ifdef HAVE_ZLIB
     z_stream zs;
-    struct writer_t*output;
+    writer_t*output;
     unsigned char writebuffer[ZLIB_BUFFER_SIZE];
 #endif
-};
+} zlibdeflate_t;
 
-static int writer_zlibdeflate_write(struct writer_t*writer, void* data, int len) 
+static int writer_zlibdeflate_write(writer_t*writer, void* data, int len) 
 {
 #ifdef HAVE_ZLIB
-    struct zlibdeflate_t*z = (struct zlibdeflate_t*)writer->internal;
+    zlibdeflate_t*z = (zlibdeflate_t*)writer->internal;
     int ret;
     if(writer->type != WRITER_TYPE_ZLIB) {
 	fprintf(stderr, "Wrong writer ID (writer not initialized?)\n");
@@ -425,7 +455,7 @@ static int writer_zlibdeflate_write(struct writer_t*writer, void* data, int len)
     if(!len)
 	return 0;
     
-    z->zs.next_in = data;
+    z->zs.next_in = (Bytef *)data;
     z->zs.avail_in = len;
 
     while(1) {
@@ -434,6 +464,7 @@ static int writer_zlibdeflate_write(struct writer_t*writer, void* data, int len)
 	if (ret != Z_OK) zlib_error(ret, "bitio:deflate_deflate", &z->zs);
 
 	if(z->zs.next_out != z->writebuffer) {
+	    writer->pos += z->zs.next_out - (Bytef*)z->writebuffer;
 	    z->output->write(z->output, z->writebuffer, z->zs.next_out - (Bytef*)z->writebuffer);
 	    z->zs.next_out = z->writebuffer;
 	    z->zs.avail_out = ZLIB_BUFFER_SIZE;
@@ -443,18 +474,53 @@ 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)
+
+void writer_zlibdeflate_flush(writer_t*writer)
 {
 #ifdef HAVE_ZLIB
-    struct zlibdeflate_t*z = (struct zlibdeflate_t*)writer->internal;
-    struct writer_t*output;
+    zlibdeflate_t*z = (zlibdeflate_t*)writer->internal;
+    int ret;
+    if(writer->type != WRITER_TYPE_ZLIB) {
+	fprintf(stderr, "Wrong writer ID (writer not initialized?)\n");
+	return;
+    }
+    if(!z) {
+	fprintf(stderr, "zlib not initialized!\n");
+	return;
+    }
+
+    z->zs.next_in = 0;
+    z->zs.avail_in = 0;
+    while(1) {
+	ret = deflate(&z->zs, Z_SYNC_FLUSH);
+	if (ret != Z_OK) zlib_error(ret, "bitio:deflate_flush", &z->zs);
+	if(z->zs.next_out != z->writebuffer) {
+	    writer->pos += z->zs.next_out - (Bytef*)z->writebuffer;
+	    z->output->write(z->output, z->writebuffer, z->zs.next_out - (Bytef*)z->writebuffer);
+	    z->zs.next_out = z->writebuffer;
+	    z->zs.avail_out = ZLIB_BUFFER_SIZE;
+	} 
+	/* TODO: how will zlib let us know it needs more buffer space? */
+	break;
+    }
+    return;
+#else
+    fprintf(stderr, "Error: swftools was compiled without zlib support");
+    exit(1);
+#endif
+}
+
+static void writer_zlibdeflate_finish(writer_t*writer)
+{
+#ifdef HAVE_ZLIB
+    zlibdeflate_t*z = (zlibdeflate_t*)writer->internal;
+    writer_t*output;
     int ret;
     if(writer->type != WRITER_TYPE_ZLIB) {
 	fprintf(stderr, "Wrong writer ID (writer not initialized?)\n");
@@ -469,6 +535,7 @@ static void writer_zlibdeflate_finish(struct writer_t*writer)
 	    ret != Z_STREAM_END) zlib_error(ret, "bitio:deflate_finish", &z->zs);
 
 	if(z->zs.next_out != z->writebuffer) {
+	    writer->pos += z->zs.next_out - (Bytef*)z->writebuffer;
 	    z->output->write(z->output, z->writebuffer, z->zs.next_out - (Bytef*)z->writebuffer);
 	    z->zs.next_out = z->writebuffer;
 	    z->zs.avail_out = ZLIB_BUFFER_SIZE;
@@ -482,23 +549,24 @@ static void writer_zlibdeflate_finish(struct writer_t*writer)
     ret = deflateEnd(&z->zs);
     if (ret != Z_OK) zlib_error(ret, "bitio:deflate_end", &z->zs);
     free(writer->internal);
-    memset(writer, 0, sizeof(struct writer_t));
+    memset(writer, 0, sizeof(writer_t));
     //output->finish(output); 
 #else
     fprintf(stderr, "Error: swftools was compiled without zlib support");
     exit(1);
 #endif
 }
-void writer_init_zlibdeflate(struct writer_t*w, struct writer_t*output)
+void writer_init_zlibdeflate(writer_t*w, writer_t*output)
 {
 #ifdef HAVE_ZLIB
-    struct zlibdeflate_t*z;
+    zlibdeflate_t*z;
     int ret;
-    memset(w, 0, sizeof(struct writer_t));
-    z = (struct zlibdeflate_t*)malloc(sizeof(struct zlibdeflate_t));
-    memset(z, 0, sizeof(struct zlibdeflate_t));
+    memset(w, 0, sizeof(writer_t));
+    z = (zlibdeflate_t*)malloc(sizeof(zlibdeflate_t));
+    memset(z, 0, sizeof(zlibdeflate_t));
     w->internal = z;
     w->write = writer_zlibdeflate_write;
+    w->flush = writer_zlibdeflate_flush;
     w->finish = writer_zlibdeflate_finish;
     w->type = WRITER_TYPE_ZLIB;
     w->pos = 0;
@@ -521,7 +589,7 @@ void writer_init_zlibdeflate(struct writer_t*w, struct writer_t*output)
 
 /* ----------------------- bit handling routines -------------------------- */
 
-void writer_writebit(struct writer_t*w, int bit)
+void writer_writebit(writer_t*w, int bit)
 {    
     if(w->bitpos==8) 
     {
@@ -533,7 +601,7 @@ void writer_writebit(struct writer_t*w, int bit)
 	w->mybyte |= 1 << (7 - w->bitpos);
     w->bitpos ++;
 }
-void writer_writebits(struct writer_t*w, unsigned int data, int bits)
+void writer_writebits(writer_t*w, unsigned int data, int bits)
 {
     int t;
     for(t=0;t<bits;t++)
@@ -541,7 +609,7 @@ void writer_writebits(struct writer_t*w, unsigned int data, int bits)
 	writer_writebit(w, (data >> (bits-t-1))&1);
     }
 }
-void writer_resetbits(struct writer_t*w)
+void writer_resetbits(writer_t*w)
 {
     if(w->bitpos)
 	w->write(w, &w->mybyte, 1);
@@ -549,7 +617,7 @@ void writer_resetbits(struct writer_t*w)
     w->mybyte = 0;
 }
  
-unsigned int reader_readbit(struct reader_t*r)
+unsigned int reader_readbit(reader_t*r)
 {
     if(r->bitpos==8) 
     {
@@ -558,7 +626,7 @@ unsigned int reader_readbit(struct reader_t*r)
     }
     return (r->mybyte>>(7-r->bitpos++))&1;
 }
-unsigned int reader_readbits(struct reader_t*r, int num)
+unsigned int reader_readbits(reader_t*r, int num)
 {
     int t;
     int val = 0;
@@ -569,9 +637,149 @@ unsigned int reader_readbits(struct reader_t*r, int num)
     }
     return val;
 }
-void reader_resetbits(struct reader_t*r)
+void reader_resetbits(reader_t*r)
 {
     r->mybyte = 0;
     r->bitpos = 8;
 
 }
+
+U8 reader_readU8(reader_t*r)
+{
+    U8 b = 0;
+    if(r->read(r, &b, 1)<1) {
+	fprintf(stderr, "bitio.c:reader_readU8: Read over end of memory region\n");
+    }
+    return b;
+}
+U16 reader_readU16(reader_t*r)
+{
+    U8 b1=0,b2=0;
+    if(r->read(r, &b1, 1)<1) {
+	fprintf(stderr, "bitio.c:reader_readU16: Read over end of memory region\n");
+    }
+    if(r->read(r, &b2, 1)<1) {
+	fprintf(stderr, "bitio.c:reader_readU16: Read over end of memory region\n");
+    }
+    return b1|b2<<8;
+}
+U32 reader_readU32(reader_t*r)
+{
+    U8 b1=0,b2=0,b3=0,b4=0;
+    if(r->read(r, &b1, 1)<1)
+	fprintf(stderr, "bitio.c:reader_readU32: Read over end of memory region\n");
+    if(r->read(r, &b2, 1)<1)
+	fprintf(stderr, "bitio.c:reader_readU32: Read over end of memory region\n");
+    if(r->read(r, &b3, 1)<1)
+	fprintf(stderr, "bitio.c:reader_readU32: Read over end of memory region\n");
+    if(r->read(r, &b4, 1)<1)
+	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;
+    r->read(r, &f, 4);
+    return f;
+
+    U8 b1=0,b2=0,b3=0,b4=0;
+    r->read(r, &b1, 1);
+    r->read(r, &b2, 1);
+    r->read(r, &b3, 1);
+    r->read(r, &b4, 1);
+    U32 w = (b1|b2<<8|b3<<16|b4<<24);
+    return *(float*)&w;
+}
+double reader_readDouble(reader_t*r)
+{
+    double f;
+    r->read(r, &f, 8);
+    return f;
+
+    U8 b[8];
+    r->read(r, b, 8);
+    U64 w = ((U64)b[0]|(U64)b[1]<<8|(U64)b[2]<<16|(U64)b[3]<<24|(U64)b[4]<<32|(U64)b[5]<<40|(U64)b[6]<<48|(U64)b[7]<<56);
+    return *(double*)&w;
+}
+char*reader_readString(reader_t*r)
+{
+    writer_t g;
+    writer_init_growingmemwriter(&g, 16);
+    while(1) {
+	U8 b = reader_readU8(r);
+	writer_writeU8(&g, b);
+	if(!b)
+	    break;
+    }
+    char*string = (char*)writer_growmemwrite_getmem(&g);
+    g.finish(&g);
+    return string;
+}
+
+void writer_writeString(writer_t*w, const char*s)
+{
+    int l = strlen(s);
+    char zero = 0;
+    w->write(w, (void*)s, l);
+    w->write(w, &zero, 1);
+}
+void writer_writeU8(writer_t*w, unsigned char b)
+{
+    w->write(w, &b, 1);
+}
+void writer_writeU16(writer_t*w, unsigned short v)
+{
+    unsigned char b1 = v;
+    unsigned char b2 = v>>8;
+    w->write(w, &b1, 1);
+    w->write(w, &b2, 1);
+}
+void writer_writeU32(writer_t*w, unsigned long v)
+{
+    unsigned char b1 = v;
+    unsigned char b2 = v>>8;
+    unsigned char b3 = v>>16;
+    unsigned char b4 = v>>24;
+    w->write(w, &b1, 1);
+    w->write(w, &b2, 1);
+    w->write(w, &b3, 1);
+    w->write(w, &b4, 1);
+}
+void writer_writeFloat(writer_t*w, float f)
+{
+    w->write(w, &f, 4);
+    return;
+
+    unsigned v = *(unsigned*)&f;
+    unsigned char b1 = v;
+    unsigned char b2 = v>>8;
+    unsigned char b3 = v>>16;
+    unsigned char b4 = v>>24;
+    w->write(w, &b1, 1);
+    w->write(w, &b2, 1);
+    w->write(w, &b3, 1);
+    w->write(w, &b4, 1);
+}
+void writer_writeDouble(writer_t*w, double f)
+{
+    w->write(w, &f, 8);
+    return;
+
+    unsigned long long v = *(unsigned long long*)&f;
+    unsigned char b1 = v;
+    unsigned char b2 = v>>8;
+    unsigned char b3 = v>>16;
+    unsigned char b4 = v>>24;
+    unsigned char b5 = v>>32;
+    unsigned char b6 = v>>40;
+    unsigned char b7 = v>>48;
+    unsigned char b8 = v>>56;
+    w->write(w, &b1, 1);
+    w->write(w, &b2, 1);
+    w->write(w, &b3, 1);
+    w->write(w, &b4, 1);
+    w->write(w, &b5, 1);
+    w->write(w, &b6, 1);
+    w->write(w, &b7, 1);
+    w->write(w, &b8, 1);
+}