Re: [python][patch] Add GDB Parameters functionality

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 28 Apr 2010 10:17:50 +0100
> From: Phil Muldoon <pmuldoon@redhat.com>
> CC: gdb-patches@sourceware.org
> 
> In the case of PARAM_STRING (which directly maps to the GDB enum
> var_type {var_string} (found in command.h)), the string is parsed one
> character at a time. If the character being currently processed equals
> a '\', parse_escape (utils.c) is called with the pointer to the string
> that points to this character as an argument.  The parse_escape
> function seems to be called during most output emitted by GDB.  In
> parse escape, the character after the '\' is fetched, and that
> character runs through an a switch.
> 
> If the case is a literal octal, the next two characters are fetched
> and converted to the character the octal escape sequence
> represents. (i.e. in our example \107 will be translated to 'G')
> 
> If the character is an a,b,f,n,r,t, or v then that character is
> returned as '\a', or '\b', or '\f' and so on.  This means that in the
> string 'Good\tDay', \t will be processed and returned as it is. So C
> escape characters are acknowledged and returned intact.

Thank you for your effort.  In that case, I suggest the following
text:

 @item PARAM_STRING
 The value is a string.  When the user modifies the string, any escape
 sequences, such as @samp{\t}, @samp{\f}, and octal escapes, are
 translated into corresponding characters and encoded into the current
 host charset.

(Is it true that GDB encodes into host charset?  If not, please modify
as appropriate.)