X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=platform%2Fexample_cygwin%2Ffunctions%2F_PDCLIB%2Fseek.c;fp=platform%2Fexample_cygwin%2Ffunctions%2F_PDCLIB%2Fseek.c;h=ee21f5695d6b82ec9cb8c8dbfb8ac197500dd8fc;hb=0c316ee3b4dc0712797877f5dc0f4a789646154d;hp=0000000000000000000000000000000000000000;hpb=ffa73a4a2673fece7cd63c471476db6bc4aef9e6;p=pdclib

diff --git a/platform/example_cygwin/functions/_PDCLIB/seek.c b/platform/example_cygwin/functions/_PDCLIB/seek.c
new file mode 100644
index 0000000..ee21f56
--- /dev/null
+++ b/platform/example_cygwin/functions/_PDCLIB/seek.c
@@ -0,0 +1,66 @@
+/* $Id$ */
+
+/* int64_t _PDCLIB_seek( FILE *, int64_t, int )
+
+   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>
+
+#ifndef _PDCLIB_GLUE_H
+#define _PDCLIB_GLUE_H
+#include <_PDCLIB_glue.h>
+#endif
+
+#include "/usr/include/errno.h"
+
+extern int lseek( int fd, int offset, int whence );
+
+_PDCLIB_int64_t _PDCLIB_seek( struct _PDCLIB_file_t * stream, _PDCLIB_int64_t offset, int whence )
+{
+    switch ( whence )
+    {
+        case SEEK_SET:
+        case SEEK_CUR:
+        case SEEK_END:
+            /* EMPTY - OK */
+            break;
+        default:
+            _PDCLIB_errno = _PDCLIB_EINVAL;
+            return EOF;
+            break;
+    }
+    _PDCLIB_int64_t rc = lseek( stream->handle, offset, whence );
+    if ( rc != EOF )
+    {
+        stream->ungetidx = 0;
+        stream->bufidx = 0;
+        stream->bufend = 0;
+        stream->pos.offset = rc;
+        return rc;
+    }
+    switch ( errno )
+    {
+        case EBADF:
+        case EFAULT:
+            _PDCLIB_errno = _PDCLIB_EIO;
+            break;
+        default:
+            _PDCLIB_errno = _PDCLIB_EUNKNOWN;
+            break;
+    }
+    return EOF;
+}
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main()
+{
+    /* Testing covered by ftell.c */
+    return TEST_RESULTS;
+}
+
+#endif
+