-/* _PDCLIB_ftell64( FILE * )\r
-\r
- This file is part of the Public Domain C Library (PDCLib).\r
- Permission is granted to use, modify, and / or redistribute at will.\r
-*/\r
-\r
-#include <stdio.h>\r
-#include <stdint.h>\r
-#include <limits.h>\r
-\r
-#ifndef REGTEST\r
-#include <_PDCLIB_io.h>\r
-\r
-uint_fast64_t _PDCLIB_ftell64_unlocked( FILE * stream )\r
-{\r
- /* ftell() must take into account:\r
- - the actual *physical* offset of the file, i.e. the offset as recognized\r
- by the operating system (and stored in stream->pos.offset); and\r
- - any buffers held by PDCLib, which\r
- - in case of unwritten buffers, count in *addition* to the offset; or\r
- - in case of unprocessed pre-read buffers, count in *substraction* to\r
- the offset. (Remember to count ungetidx into this number.)\r
- Conveniently, the calculation ( ( bufend - bufidx ) + ungetidx ) results\r
- in just the right number in both cases:\r
- - in case of unwritten buffers, ( ( 0 - unwritten ) + 0 )\r
- i.e. unwritten bytes as negative number\r
- - in case of unprocessed pre-read, ( ( preread - processed ) + unget )\r
- i.e. unprocessed bytes as positive number.\r
- That is how the somewhat obscure return-value calculation works.\r
- */\r
-\r
- /* ungetc on a stream at offset==0 will cause an overflow to UINT64_MAX.\r
- * C99/C11 says that the return value of ftell in this case is \r
- * "indeterminate"\r
- */\r
-\r
- return ( stream->pos.offset - ( ( (int)stream->bufend - (int)stream->bufidx ) + (int)stream->ungetidx ) );\r
-}\r
-\r
-uint_fast64_t _PDCLIB_ftell64( FILE * stream )\r
-{\r
- _PDCLIB_flockfile( stream );\r
- uint_fast64_t pos = _PDCLIB_ftell64_unlocked( stream );\r
- _PDCLIB_funlockfile( stream );\r
- return pos;\r
-}\r
-\r
-#endif\r
-\r
-#ifdef TEST\r
-#include <_PDCLIB_test.h>\r
-\r
-#include <stdlib.h>\r
-\r
-int main( void )\r
-{\r
- /* Tested by ftell */\r
- return TEST_RESULTS;\r
-}\r
-\r
-#endif\r
-\r
+/* _PDCLIB_ftell64( FILE * )
+
+ This file is part of the Public Domain C Library (PDCLib).
+ Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdio.h>
+#include <stdint.h>
+#include <limits.h>
+
+#ifndef REGTEST
+#include "_PDCLIB_io.h"
+
+uint_fast64_t _PDCLIB_ftell64_unlocked( FILE * stream )
+{
+ /* ftell() must take into account:
+ - the actual *physical* offset of the file, i.e. the offset as recognized
+ by the operating system (and stored in stream->pos.offset); and
+ - any buffers held by PDCLib, which
+ - in case of unwritten buffers, count in *addition* to the offset; or
+ - in case of unprocessed pre-read buffers, count in *substraction* to
+ the offset. (Remember to count ungetidx into this number.)
+ Conveniently, the calculation ( ( bufend - bufidx ) + ungetidx ) results
+ in just the right number in both cases:
+ - in case of unwritten buffers, ( ( 0 - unwritten ) + 0 )
+ i.e. unwritten bytes as negative number
+ - in case of unprocessed pre-read, ( ( preread - processed ) + unget )
+ i.e. unprocessed bytes as positive number.
+ That is how the somewhat obscure return-value calculation works.
+ */
+
+ /* ungetc on a stream at offset==0 will cause an overflow to UINT64_MAX.
+ * C99/C11 says that the return value of ftell in this case is
+ * "indeterminate"
+ */
+
+ return ( stream->pos.offset - ( ( (int)stream->bufend - (int)stream->bufidx ) + (int)stream->ungetidx ) );
+}
+
+uint_fast64_t _PDCLIB_ftell64( FILE * stream )
+{
+ _PDCLIB_flockfile( stream );
+ uint_fast64_t pos = _PDCLIB_ftell64_unlocked( stream );
+ _PDCLIB_funlockfile( stream );
+ return pos;
+}
+
+#endif
+
+#ifdef TEST
+#include "_PDCLIB_test.h"
+
+#include <stdlib.h>
+
+int main( void )
+{
+ /* Tested by ftell */
+ return TEST_RESULTS;
+}
+
+#endif
+