Implement numerical output formats for decimal, hexadecimal, octal,

and binary numbers.

Closes bug #16129: more output formats for fuse bits (avrdude
enhancement request)

* fileio.c: Implement fileio_num() and the itoa_simple() helper function.
* fileio.h: Add new file formats to FILEFMT.
* main.c: Parse the new file formats.
* avrdude.1: Document all this.
* doc/avrdude.texi: (Ditto.)


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@654 81a1dc3b-b13d-400b-aceb-764788c761c2

avrdude.1

@@ -505,6 +505,24 @@ having to create a single-byte file or enter terminal mode.
 auto detect; valid for input only, and only if the input is not
 provided at
 .Em stdin .
+.It Ar d
+decimal; this and the following formats are only valid on output.
+They generate one line of output for the respective memory section,
+forming a comma-separated list of the values.
+This can be particularly useful for subsequent processing, like for
+fuse bit settings.
+.It Ar h
+hexadecimal; each value will get the string
+.Em 0x
+prepended.
+.It Ar o
+octal; each value will get a
+.Em 0
+prepended unless it is less than 8 in which case it gets no prefix.
+.It Ar b
+binary; each value will get the string
+.Em 0b
+prepended.
 .El
 .Pp
 The default is to use auto detection for input files, and raw binary