code clean up

[oweals/gnunet.git] / src / util / bio.c

diff --git a/src/util/bio.c b/src/util/bio.c
index 102d3df509bbbb64ecc9c43d0ec1a2b0f3ed3ddd..059638ff1f492414c25a1ac1db9abe65dbe7aab9 100644 (file)
--- a/src/util/bio.c
+++ b/src/util/bio.c
@@ -146,6 +146,30 @@ GNUNET_BIO_read (struct GNUNET_BIO_ReadHandle *h,
 }
 
 
+/**
+ * Read the contents of a binary file into a buffer.
+ *
+ * @param h handle to an open file
+ * @param file name of the source file
+ * @param line line number in the source file
+ * @param result the buffer to write the result to
+ * @param len the number of bytes to read
+ * @return GNUNET_OK on success, GNUNET_SYSERR on failure
+ */
+int GNUNET_BIO_read_fn (struct GNUNET_BIO_ReadHandle *h, 
+                       const char *file, int line,
+                       void *result, 
+                       size_t len)
+{
+  char what[1024];
+  GNUNET_snprintf (what,
+                  sizeof(what),
+                  "%s:%d",
+                  file, line);
+  return GNUNET_BIO_read (h, what, result, len);
+}
+
+
 /**
  * Read 0-terminated string from a file.
  *
@@ -164,7 +188,13 @@ GNUNET_BIO_read_string (struct GNUNET_BIO_ReadHandle *h,
   uint32_t big;
 
   if (GNUNET_OK != GNUNET_BIO_read_int32 (h, &big))
-    return GNUNET_SYSERR;
+    {
+      GNUNET_free_non_null (h->emsg);
+      GNUNET_asprintf (&h->emsg,
+                       _("Error reading length of string `%s'"),
+                       what);
+      return GNUNET_SYSERR;
+    }
   if (big == 0)
     {
       *result = NULL;
@@ -209,8 +239,13 @@ GNUNET_BIO_read_meta_data (struct GNUNET_BIO_ReadHandle *h,
   char *buf;
   struct GNUNET_CONTAINER_MetaData *meta;
 
-  if (GNUNET_BIO_read_int32__ (h, what, (int32_t *) &size) != GNUNET_OK)
+  if (GNUNET_BIO_read_int32 (h, (int32_t *) &size) != GNUNET_OK)
     return GNUNET_SYSERR;
+  if (size == 0)
+    {
+      *result = NULL;
+      return GNUNET_OK;
+    }
   if (size > MAX_META_DATA)
     {
       GNUNET_asprintf (&h->emsg,
@@ -242,17 +277,20 @@ GNUNET_BIO_read_meta_data (struct GNUNET_BIO_ReadHandle *h,
  * Read an (u)int32_t.
  *
  * @param h hande to open file
- * @param what describes what is being read (for error message creation)
+ * @param file name of the source file
+ * @param line line number in the source file
  * @param i address of 32-bit integer to read
  * @return GNUNET_OK on success, GNUNET_SYSERR on error
  */
 int
 GNUNET_BIO_read_int32__ (struct GNUNET_BIO_ReadHandle *h,
-                         const char *what, int32_t * i)
+                         const char *file,
+                        int line,
+                        int32_t * i)
 {
   int32_t big;
 
-  if (GNUNET_OK != GNUNET_BIO_read (h, what, &big, sizeof (int32_t)))
+  if (GNUNET_OK != GNUNET_BIO_read_fn (h, file, line, &big, sizeof (int32_t)))
     return GNUNET_SYSERR;
   *i = ntohl (big);
   return GNUNET_OK;
@@ -263,17 +301,20 @@ GNUNET_BIO_read_int32__ (struct GNUNET_BIO_ReadHandle *h,
  * Read an (u)int64_t.
  *
  * @param h hande to open file
- * @param what describes what is being read (for error message creation)
+ * @param file name of the source file
+ * @param line line number in the source file
  * @param i address of 64-bit integer to read
  * @return GNUNET_OK on success, GNUNET_SYSERR on error
  */
 int
 GNUNET_BIO_read_int64__ (struct GNUNET_BIO_ReadHandle *h,
-                         const char *what, int64_t * i)
+                         const char *file, 
+                        int line,
+                        int64_t * i)
 {
   int64_t big;
 
-  if (GNUNET_OK != GNUNET_BIO_read (h, what, &big, sizeof (int64_t)))
+  if (GNUNET_OK != GNUNET_BIO_read_fn (h, file, line, &big, sizeof (int64_t)))
     return GNUNET_SYSERR;
   *i = GNUNET_ntohll (big);
   return GNUNET_OK;
@@ -433,22 +474,19 @@ GNUNET_BIO_write_meta_data (struct GNUNET_BIO_WriteHandle *h,
 {
   ssize_t size;
   char *buf;
-
-  size = GNUNET_CONTAINER_meta_data_get_serialized_size (m,
-                                                         GNUNET_CONTAINER_META_DATA_SERIALIZE_FULL
-                                                         |
-                                                         GNUNET_CONTAINER_META_DATA_SERIALIZE_NO_COMPRESS);
-  if (size == -1)
-    return GNUNET_SYSERR;
-  if (size > MAX_META_DATA)
-    size = MAX_META_DATA;  
-  buf = GNUNET_malloc (size);
+  
+  if (m == NULL)    
+    return GNUNET_BIO_write_int32 (h, 0);   
+  buf = NULL;
   size = GNUNET_CONTAINER_meta_data_serialize (m,
-                                              buf,
-                                              size,
-                                              GNUNET_CONTAINER_META_DATA_SERIALIZE_PART
-                                              |
-                                              GNUNET_CONTAINER_META_DATA_SERIALIZE_NO_COMPRESS);
+                                              &buf,
+                                              MAX_META_DATA,
+                                              GNUNET_CONTAINER_META_DATA_SERIALIZE_PART);
+  if (size == -1)
+    {
+      GNUNET_free (buf);
+      return GNUNET_SYSERR;
+    }
   if ( (GNUNET_OK != GNUNET_BIO_write_int32 (h, (uint32_t) size)) ||
        (GNUNET_OK != GNUNET_BIO_write (h, buf, size)) )
     {