X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=blobdiff_plain;f=src%2Fber_int.c;h=e9b23a2fb0be99d27c347eb7af67352a33fa4cf0;hp=f9a61ae6b239be6f3d4b65897a8b3bfab18b5562;hb=3ae80066499b6ec541c8f474654668f65f0f1c3c;hpb=8d691989077a0addcbd840d769dce6700f3d9622

diff --git a/src/ber_int.c b/src/ber_int.c
index f9a61ae..e9b23a2 100644
--- a/src/ber_int.c
+++ b/src/ber_int.c
@@ -1,11 +1,9 @@
-/*
- * Copyright (C) 1995-2007, Index Data ApS
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2013 Index Data
  * See the file LICENSE for details.
- *
- * $Id: ber_int.c,v 1.7 2007-01-03 08:42:15 adam Exp $
  */
 
-/** 
+/**
  * \file ber_int.c
  * \brief Implements BER INTEGER encoding and decoding.
  *
@@ -25,16 +23,14 @@
 
 #ifdef WIN32
 #include <winsock.h>
-#else
-#include <netinet/in.h>
 #endif
 
 #include "odr-priv.h"
 
-static int ber_encinteger(ODR o, int val);
-static int ber_decinteger(const unsigned char *buf, int *val, int max);
+static int ber_encinteger(ODR o, Odr_int val);
+static int ber_decinteger(const unsigned char *buf, Odr_int *val, int max);
 
-int ber_integer(ODR o, int *val)
+int ber_integer(ODR o, Odr_int *val)
 {
     int res;
 
@@ -62,20 +58,26 @@ int ber_integer(ODR o, int *val)
 /*
  * Returns: number of bytes written or -1 for error (out of bounds).
  */
-int ber_encinteger(ODR o, int val)
+int ber_encinteger(ODR o, Odr_int val)
 {
-    int a, len;
-    union { int i; unsigned char c[sizeof(int)]; } tmp;
-
-    tmp.i = htonl(val);   /* ensure that that we're big-endian */
-    for (a = 0; a < (int) sizeof(int) - 1; a++)  /* skip superfluous octets */
-        if (!((tmp.c[a] == 0 && !(tmp.c[a+1] & 0X80)) ||
-            (tmp.c[a] == 0XFF && (tmp.c[a+1] & 0X80))))
+    unsigned long long uval = val;
+    unsigned char tmp[sizeof(uval)];
+    int len;
+    size_t i;
+    for (i = sizeof(uval); i > 0; )
+    {
+        tmp[--i] = uval;
+        uval >>= 8;
+    }
+    for (i = 0; i < sizeof(uval)-1; i++)
+        if (!((tmp[i] == 0 && !(tmp[i+1] & 0x80))
+              ||
+              (tmp[i] == 0xFF && (tmp[i+1] & 0x80))))
             break;
-    len = sizeof(int) - a;
+    len = sizeof(uval) - i;
     if (ber_enclen(o, len, 1, 1) != 1)
         return -1;
-    if (odr_write(o, (unsigned char*) tmp.c + a, len) < 0)
+    if (odr_write(o, (unsigned char*) tmp + i, len) < 0)
         return -1;
     return 0;
 }
@@ -83,36 +85,34 @@ int ber_encinteger(ODR o, int val)
 /*
  * Returns: Number of bytes read or 0 if no match, -1 if error.
  */
-int ber_decinteger(const unsigned char *buf, int *val, int max)
+int ber_decinteger(const unsigned char *buf, Odr_int *val, int max)
 {
+    unsigned long long uval = 0;
+    int i, len;
+    int res;
     const unsigned char *b = buf;
-    unsigned char fill;
-    int res, len, remains;
-    union { int i; unsigned char c[sizeof(int)]; } tmp;
 
     if ((res = ber_declen(b, &len, max)) < 0)
         return -1;
     if (len+res > max || len < 0) /* out of bounds or indefinite encoding */
-        return -1;  
-    if (len > (int) sizeof(int))  /* let's be reasonable, here */
         return -1;
-    b+= res;
-
-    remains = sizeof(int) - len;
-    memcpy(tmp.c + remains, b, len);
-    if (*b & 0X80)
-        fill = 0XFF;
-    else
-        fill = 0X00;
-    memset(tmp.c, fill, remains);
-    *val = ntohl(tmp.i);
-
+    if (len > (int) sizeof(uval))  /* let's be reasonable, here */
+        return -1;
+    b += res;
+
+    if (*b & 0x80)
+        for (i = 0; i < (int) sizeof(uval) - len; i++)
+            uval = (uval << 8) + 0xFF;
+    for (i = 0; i < len; i++)
+        uval = (uval << 8) + b[i];
+    *val = uval;
     b += len;
     return b - buf;
 }
 /*
  * Local variables:
  * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
  * indent-tabs-mode: nil
  * End:
  * vim: shiftwidth=4 tabstop=8 expandtab