1 files changed, 58 insertions, 0 deletions
diff --git a/modules/libjar/zipwriter/StreamFunctions.h b/modules/libjar/zipwriter/StreamFunctions.h
new file mode 100644
index 0000000000..b3fc20d04a
--- /dev/null
+++ b/modules/libjar/zipwriter/StreamFunctions.h
@@ -0,0 +1,58 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#ifndef _nsStreamFunctions_h_
+#define _nsStreamFunctions_h_
+
+#include "nscore.h"
+#include "nsIInputStream.h"
+#include "nsIOutputStream.h"
+
+/*
+ * ZIP file data is stored little-endian. These are helper functions to read and
+ * write little endian data to/from a char buffer.
+ * The off argument, where present, is incremented according to the number of
+ * bytes consumed from the buffer.
+ */
+inline void WRITE8(uint8_t* buf, uint32_t* off, uint8_t val) {
+  buf[(*off)++] = val;
+}
+
+inline void WRITE16(uint8_t* buf, uint32_t* off, uint16_t val) {
+  WRITE8(buf, off, val & 0xff);
+  WRITE8(buf, off, (val >> 8) & 0xff);
+}
+
+inline void WRITE32(uint8_t* buf, uint32_t* off, uint32_t val) {
+  WRITE16(buf, off, val & 0xffff);
+  WRITE16(buf, off, (val >> 16) & 0xffff);
+}
+
+inline uint8_t READ8(const uint8_t* buf, uint32_t* off) {
+  return buf[(*off)++];
+}
+
+inline uint16_t READ16(const uint8_t* buf, uint32_t* off) {
+  uint16_t val = READ8(buf, off);
+  val |= READ8(buf, off) << 8;
+  return val;
+}
+
+inline uint32_t READ32(const uint8_t* buf, uint32_t* off) {
+  uint32_t val = READ16(buf, off);
+  val |= READ16(buf, off) << 16;
+  return val;
+}
+
+inline uint32_t PEEK32(const uint8_t* buf) {
+  return (uint32_t)((buf[0]) | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24));
+}
+
+nsresult ZW_ReadData(nsIInputStream* aStream, char* aBuffer, uint32_t aCount);
+
+nsresult ZW_WriteData(nsIOutputStream* aStream, const char* aBuffer,
+                      uint32_t aCount);
+
+#endif