Initial commit of files

src/libasn1/uper_get_octet.c

@@ -0,0 +1,79 @@
+/*****************************************************************************
+ * Copyright (C) 2004-2021
+ * ProbeStar Technical Systems, LLC
+ * All Rights Reserved.  Proprietary and Confidential.
+ *============================================================================
+*****************************************************************************/
+
+/*****************************************************************************
+ * includes
+*****************************************************************************/
+
+#include "embtypes.h"
+#include "asn1uper.h"
+
+/*****************************************************************************
+ * defines
+*****************************************************************************/
+
+/*****************************************************************************
+ * macros
+*****************************************************************************/
+
+#define min(A,B)        ((A)<(B)?(A):(B))
+#define max(A,B)        ((A)>(B)?(A):(B))
+
+/*****************************************************************************
+ * structs & typedefs
+*****************************************************************************/
+
+/*****************************************************************************
+ * global constants
+*****************************************************************************/
+
+/*****************************************************************************
+ * global variables
+*****************************************************************************/
+
+/*****************************************************************************
+ * static constants
+*****************************************************************************/
+
+/*****************************************************************************
+ * static variables
+*****************************************************************************/
+
+/*****************************************************************************
+ * static prototypes
+*****************************************************************************/
+
+/*****************************************************************************
+ * C functions
+*****************************************************************************/
+
+uint uper_get_octet_stream(UPER_Stream *uper, uint8_t *buf, uint min, uint max)
+{
+  if (!uper || !buf || !max)
+    return 0;
+  
+  // # bits
+  uint num = 0;
+  uint m = max;
+  while (m) {
+    m >>= 1;
+    num++;
+  }
+  
+  uint len = max;
+
+  // # bytes
+  if (min < max) {
+    len = uper_get_bits_length(uper, num);
+  }
+  
+  if (_asn1_debug_on_)
+    printf("\tGET_OCTET = bits=%d, len/max=%d/%d\n", num, len, max);
+
+  // slurp bytes
+  return uper_get_bytes_stream(uper, buf, len);
+}