From bfc6330db59800287137dc0283f25c7d043159eb Mon Sep 17 00:00:00 2001 From: Owen Shepherd Date: Sun, 26 Aug 2012 16:04:22 +0100 Subject: [PATCH] PDCLIB-7: When fseek is called with SEEK_CUR, internally calculate the new offset and then hand SEEK_SET to the glue layer, as our offset may differ from the offset of the underlying file descriptor due to buffering --- functions/stdio/fseek.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/functions/stdio/fseek.c b/functions/stdio/fseek.c index ab6679b..18c38c3 100644 --- a/functions/stdio/fseek.c +++ b/functions/stdio/fseek.c @@ -12,8 +12,9 @@ #include <_PDCLIB_glue.h> -int fseek( struct _PDCLIB_file_t * stream, long offset, int whence ) +int fseek( struct _PDCLIB_file_t * stream, long loffset, int whence ) { + _PDCLIB_int64_t offset = loffset; if ( stream->status & _PDCLIB_FWRITE ) { if ( _PDCLIB_flushbuffer( stream ) == EOF ) @@ -26,6 +27,13 @@ int fseek( struct _PDCLIB_file_t * stream, long offset, int whence ) { stream->status &= ~ ( _PDCLIB_FREAD | _PDCLIB_FWRITE ); } + + if ( whence == SEEK_CUR ) + { + whence = SEEK_SET; + offset += stream->pos.offset; + } + return ( _PDCLIB_seek( stream, offset, whence ) != EOF ) ? 0 : EOF; } -- 2.40.0