compiled newlib, need to hook up the system calls

rocklibc/src/_PDCLIB/_PDCLIB_bigint_log2.c

@@ -0,0 +1,64 @@
+/* _PDCLIB_bigint_log2( bigint_t const * )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#ifndef REGTEST
+
+#include "pdclib/_PDCLIB_print.h"
+
+int _PDCLIB_bigint_log2( _PDCLIB_bigint_t const * bigint )
+{
+    _PDCLIB_size_t s = bigint->size;
+
+    if ( s == 0 )
+    {
+        return -1;
+    }
+
+    --s;
+
+    return _PDCLIB_bigint_digit_log2( bigint->data[ s ] ) + s * _PDCLIB_BIGINT_DIGIT_BITS;
+}
+
+#endif
+
+#ifdef TEST
+
+#include "_PDCLIB_test.h"
+
+int main( void )
+{
+#ifndef REGTEST
+    _PDCLIB_bigint_t bigint;
+    _PDCLIB_bigint_t one;
+    _PDCLIB_bigint_from_digit( &bigint, 0 );
+    _PDCLIB_bigint_from_digit( &one, 1 );
+
+    TESTCASE( _PDCLIB_bigint_log2( &bigint ) == -1 );
+    TESTCASE( _PDCLIB_bigint_log2( &one ) == 0 );
+
+    _PDCLIB_bigint_mul10( &one );
+    TESTCASE( _PDCLIB_bigint_log2( &one ) == 3 );
+
+    _PDCLIB_bigint_mul10( &one );
+    TESTCASE( _PDCLIB_bigint_log2( &one ) == 6 );
+
+    _PDCLIB_bigint_mul10( &one );
+    TESTCASE( _PDCLIB_bigint_log2( &one ) == 9 );
+
+    _PDCLIB_bigint_mul10( &one );
+    TESTCASE( _PDCLIB_bigint_log2( &one ) == 13 );
+
+    _PDCLIB_bigint_mul10( &one );
+    TESTCASE( _PDCLIB_bigint_log2( &one ) == 16 );
+
+    _PDCLIB_bigint_mul10( &one );
+    TESTCASE( _PDCLIB_bigint_log2( &one ) == 19 );
+#endif
+
+    return TEST_RESULTS;
+}
+
+#endif