Separate modules by subdirectory

src/util/Makefile.am

@@ -0,0 +1,5 @@
+AM_CXXFLAGS = --std=c++0x -pedantic -Werror -Wall -Wextra -Weffc++ -fno-default-inline -pipe
+
+noinst_LIBRARIES = libmoshutil.a
+
+libmoshutil_a_SOURCES = swrite.cc swrite.h dos_assert.h

src/util/dos_assert.h

@@ -0,0 +1,22 @@
+#ifndef DOS_ASSERT_HPP
+#define DOS_ASSERT_HPP
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "crypto.h"
+
+static void dos_detected( const char *expression, const char *file, int line, const char *function )
+{
+  char buffer[ 2048 ];
+  snprintf( buffer, 2048, "Illegal counterparty input (possible denial of service) in function %s at %s:%d, failed test: %s\n",
+	    function, file, line, expression );
+  throw Crypto::CryptoException( buffer );
+}
+
+#define dos_assert(expr)						\
+  ((expr)								\
+   ? (void)0								\
+   : dos_detected (__STRING(expr), __FILE__, __LINE__, __PRETTY_FUNCTION__ ))
+
+#endif

src/util/swrite.cc

@@ -0,0 +1,23 @@
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "swrite.h"
+
+int swrite( int fd, const char *str, ssize_t len )
+{
+  ssize_t total_bytes_written = 0;
+  ssize_t bytes_to_write = ( len >= 0 ) ? len : strlen( str );
+  while ( total_bytes_written < bytes_to_write ) {
+    ssize_t bytes_written = write( fd, str + total_bytes_written,
+				   bytes_to_write - total_bytes_written );
+    if ( bytes_written <= 0 ) {
+      perror( "write" );
+      return -1;
+    } else {
+      total_bytes_written += bytes_written;
+    }
+  }
+
+  return 0;
+}

src/util/swrite.h

@@ -0,0 +1,6 @@
+#ifndef SWRITE_HPP
+#define SWRITE_HPP
+
+int swrite( int fd, const char *str, ssize_t len = -1 );
+
+#endif