newlib-2.4.0

git-svn-id: svn://kolibrios.org@6536 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/libc/stdio/stdio_ext.c

@@ -0,0 +1,113 @@
+/*
+FUNCTION
+<<stdio_ext>>,<<__fbufsize>>,<<__fpending>>,<<__flbf>>,<<__freadable>>,<<__fwritable>>,<<__freading>>,<<__fwriting>>---access internals of FILE structure
+
+INDEX
+	__fbufsize
+INDEX
+	__fpending
+INDEX
+	__flbf
+INDEX
+	__freadable
+INDEX
+	__fwritable
+INDEX
+	__freading
+INDEX
+	__fwriting
+
+ANSI_SYNOPSIS
+	#include <stdio.h>
+	#include <stdio_ext.h>
+	size_t __fbufsize(FILE *<[fp]>);
+	size_t __fpending(FILE *<[fp]>);
+	int __flbf(FILE *<[fp]>);
+	int __freadable(FILE *<[fp]>);
+	int __fwritable(FILE *<[fp]>);
+	int __freading(FILE *<[fp]>);
+	int __fwriting(FILE *<[fp]>);
+
+DESCRIPTION
+These functions provides access to the internals of the FILE structure <[fp]>.
+
+RETURNS
+<<__fbufsize>> returns the number of bytes in the buffer of stream <[fp]>.
+
+<<__fpending>> returns the number of bytes in the output buffer of stream <[fp]>.
+
+<<__flbf>> returns nonzero if stream <[fp]> is line-buffered, and <<0>> if not.
+
+<<__freadable>> returns nonzero if stream <[fp]> may be read, and <<0>> if not.
+
+<<__fwritable>> returns nonzero if stream <[fp]> may be written, and <<0>> if not.
+
+<<__freading>> returns nonzero if stream <[fp]> if the last operation on
+it was a read, or if it read-only, and <<0>> if not.
+
+<<__fwriting>> returns nonzero if stream <[fp]> if the last operation on
+it was a write, or if it write-only, and <<0>> if not.
+
+PORTABILITY
+These functions originate from Solaris and are also provided by GNU libc.
+
+No supporting OS subroutines are required.
+*/
+
+#ifndef __rtems__
+
+#include <_ansi.h>
+#include <stdio.h>
+
+/* Subroutine versions of the inline or macro functions. */
+
+size_t
+_DEFUN(__fbufsize, (fp),
+       FILE * fp)
+{
+  return (size_t) fp->_bf._size;
+}
+
+size_t
+_DEFUN(__fpending, (fp),
+       FILE * fp)
+{
+  return fp->_p - fp->_bf._base;
+}
+
+int
+_DEFUN(__flbf, (fp),
+       FILE * fp)
+{
+  return (fp->_flags & __SLBF) != 0;
+}
+
+int
+_DEFUN(__freadable, (fp),
+       FILE * fp)
+{
+  return (fp->_flags & (__SRD | __SRW)) != 0;
+}
+
+int
+_DEFUN(__fwritable, (fp),
+       FILE * fp)
+{
+  return (fp->_flags & (__SWR | __SRW)) != 0;
+}
+
+int
+_DEFUN(__freading, (fp),
+       FILE * fp)
+{
+  return (fp->_flags & __SRD) != 0;
+}
+
+int
+_DEFUN(__fwriting, (fp),
+       FILE * fp)
+{
+  return (fp->_flags & __SWR) != 0;
+}
+
+#endif /* __rtems__ */