endian: Added 64-bit integer read function

2 files changed, 46 insertions, 2 deletions

diff --git a/lib/curl_endian.c b/lib/curl_endian.c
index 2d291c84c..7ce2646d4 100644
--- a/lib/curl_endian.c
+++ b/lib/curl_endian.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -63,6 +63,41 @@ unsigned int Curl_read32_le(unsigned char *buf)
 }
 
 /*
+ * Curl_read64_le()
+ *
+ * This function converts a 64-bit integer from the little endian format, as
+ * used in the incoming package to whatever endian format we're using
+ * natively.
+ *
+ * Parameters:
+ *
+ * buf      [in]     - A pointer to a 8 byte buffer.
+ *
+ * Returns the integer.
+ */
+#if defined(HAVE_LONGLONG)
+unsigned long long Curl_read64_le(unsigned char *buf)
+{
+  return ((unsigned long long)buf[0]) |
+         ((unsigned long long)buf[1] << 8) |
+         ((unsigned long long)buf[2] << 16) |
+         ((unsigned long long)buf[3] << 24) |
+         ((unsigned long long)buf[4] << 32) |
+         ((unsigned long long)buf[5] << 40) |
+         ((unsigned long long)buf[6] << 48) |
+         ((unsigned long long)buf[7] << 54);
+}
+#else
+unsigned __int64 Curl_read64_le(unsigned char *buf)
+{
+  return ((unsigned __int64)buf[0]) | ((unsigned __int64)buf[1] << 8) |
+         ((unsigned __int64)buf[2] << 16) | ((unsigned __int64)buf[3] << 24) |
+         ((unsigned __int64)buf[4] << 32) | ((unsigned __int64)buf[5] << 40) |
+         ((unsigned __int64)buf[6] << 48) | ((unsigned __int64)buf[7] << 54);
+}
+#endif
+
+/*
  * Curl_write16_le()
  *
  * This function converts a 16-bit integer from the native endian format,
diff --git a/lib/curl_endian.h b/lib/curl_endian.h
index 79eb3e8f6..47a7ae6b8 100644
--- a/lib/curl_endian.h
+++ b/lib/curl_endian.h
@@ -7,7 +7,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -28,6 +28,15 @@ unsigned short Curl_read16_le(unsigned char *buf);
 /* Converts a 32-bit integer from little endian */
 unsigned int Curl_read32_le(unsigned char *buf);
 
+#if (CURL_SIZEOF_CURL_OFF_T > 4)
+/* Converts a 64-bit integer from little endian */
+#if defined(HAVE_LONGLONG)
+unsigned long long Curl_read64_le(unsigned char *buf);
+#else
+unsigned __int64 Curl_read64_le(unsigned char *buf);
+#endif
+#endif
+
 /* Converts a 16-bit integer to little endian */
 void Curl_write16_le(const short value, unsigned char *buffer);