1 files changed, 72 insertions, 0 deletions
diff --git a/newlib/libc/stdlib/atof.c b/newlib/libc/stdlib/atof.c
new file mode 100644
index 00000000000..cf4abdb7142
--- /dev/null
+++ b/newlib/libc/stdlib/atof.c
@@ -0,0 +1,72 @@
+/*
+FUNCTION
+   <<atof>>, <<atoff>>---string to double or float
+
+INDEX
+	atof
+INDEX
+	atoff
+
+ANSI_SYNOPSIS
+	#include <stdlib.h>
+        double atof(const char *<[s]>);
+        float atoff(const char *<[s]>);
+
+TRAD_SYNOPSIS
+	#include <stdlib.h>
+        double atof(<[s]>)
+        char *<[s]>;
+
+        float atoff(<[s]>)
+        char *<[s]>;
+
+DESCRIPTION
+<<atof>> converts the initial portion of a string to a <<double>>.
+<<atoff>> converts the initial portion of a string to a <<float>>.
+
+The functions parse the character string <[s]>,
+locating a substring which can be converted to a floating point
+value. The substring must match the format:
+. [+|-]<[digits]>[.][<[digits]>][(e|E)[+|-]<[digits]>]
+The substring converted is the longest initial
+fragment of <[s]> that has the expected format, beginning with
+the first non-whitespace character.  The substring
+is empty if <<str>> is empty, consists entirely
+of whitespace, or if the first non-whitespace character is
+something other than <<+>>, <<->>, <<.>>, or a digit.
+
+<<atof(<[s]>)>> is implemented as <<strtod(<[s]>, NULL)>>.
+<<atoff(<[s]>)>> is implemented as <<strtodf(<[s]>, NULL)>>.
+
+RETURNS
+<<atof>> returns the converted substring value, if any, as a
+<<double>>; or <<0.0>>,  if no conversion could be performed.
+If the correct value is out of the range of representable values, plus
+or minus <<HUGE_VAL>> is returned, and <<ERANGE>> is stored in
+<<errno>>.
+If the correct value would cause underflow, <<0.0>> is returned
+and <<ERANGE>> is stored in <<errno>>.
+
+<<atoff>> obeys the same rules as <<atof>>, except that it
+returns a <<float>>.
+
+PORTABILITY
+<<atof>> is ANSI C. <<atof>>, <<atoi>>, and <<atol>> are subsumed by <<strod>>
+and <<strol>>, but are used extensively in existing code. These functions are
+less reliable, but may be faster if the argument is verified to be in a valid
+range.
+
+Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
+<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
+*/
+
+
+#include <stdlib.h>
+#include <_ansi.h>
+
+double
+_DEFUN (atof, (s),
+	_CONST char *s)
+{
+  return strtod (s, NULL);
+}