[Bug c/77521] %qc format directive should quote non-printable characters

["msebor at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77521

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Author: msebor
Date: Fri Sep  9 23:12:10 2016
New Revision: 240059

URL: https://gcc.gnu.org/viewcvs?rev=240059&root=gcc&view=rev
Log:
PR c/77520 - wrong value for extended ASCII characters in -Wformat message
PR c/77521 - %qc format directive should quote non-printable characters

gcc/c-family/ChangeLog:

        PR c/77520
        PR c/77521
        * c-format.c (argument_parser::find_format_char_info): Use %qc
        format directive unconditionally.

gcc/ChangeLog:

        PR c/77520
        PR c/77521
        * pretty-print.c (pp_quoted_string): New function.
        (pp_format): Call it for %c and %s directives.

gcc/testsuite/ChangeLog:

        PR c/77520
        PR c/77521
        * gcc.dg/pr77520.c: New test.
        * gcc.dg/pr77521.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/pr77520.c
    trunk/gcc/testsuite/gcc.dg/pr77521.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-format.c
    trunk/gcc/pretty-print.c
    trunk/gcc/testsuite/ChangeLog