import newlib-2000-02-17 snapshot

1 files changed, 54 insertions, 0 deletions

diff --git a/newlib/libc/stdio/fsetpos.c b/newlib/libc/stdio/fsetpos.c
new file mode 100644
index 000000000..28cd69ead
--- /dev/null
+++ b/newlib/libc/stdio/fsetpos.c
@@ -0,0 +1,54 @@
+/*
+FUNCTION
+<<fsetpos>>---restore position of a stream or file
+
+INDEX
+	fsetpos
+
+ANSI_SYNOPSIS
+	#include <stdio.h>
+	int fsetpos(FILE *<[fp]>, const fpos_t *<[pos]>);
+
+TRAD_SYNOPSIS
+	#include <stdio.h>
+	int fsetpos(<[fp]>, <[pos]>)
+	FILE *<[fp]>;
+	fpos_t *<[pos]>;
+
+DESCRIPTION
+Objects of type <<FILE>> can have a ``position'' that records how much
+of the file your program has already read.  Many of the <<stdio>> functions
+depend on this position, and many change it as a side effect.
+
+You can use <<fsetpos>> to return the file identified by <[fp]> to a previous
+position <<*<[pos]>>> (after first recording it with <<fgetpos>>).
+
+See <<fseek>> for a similar facility.
+
+RETURNS
+<<fgetpos>> returns <<0>> when successful.  If <<fgetpos>> fails, the
+result is <<1>>.  The reason for failure is indicated in <<errno>>:
+either <<ESPIPE>> (the stream identified by <[fp]> doesn't support
+repositioning) or <<EINVAL>> (invalid file position).
+
+PORTABILITY
+ANSI C requires <<fsetpos>>, but does not specify the nature of
+<<*<[pos]>>> beyond identifying it as written by <<fgetpos>>.
+
+Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
+<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
+*/
+
+#include <stdio.h>
+
+int
+_DEFUN (fsetpos, (iop, pos),
+	FILE * iop _AND
+	_CONST fpos_t * pos)
+{
+  int x = fseek (iop, *pos, SEEK_SET);
+
+  if (x != 0)
+    return 1;
+  return 0;
+}