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libarchive: Avoid bogus conversion warning from PGI compiler

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We cannot suppress PGI compiler warnings completely because even with
the "-w" flag the compiler still writes a message containing "compilation
completed with warnings" to stderr.

A warning is triggered by expressions like

  test ? NULL : ptr_to_const_char
  test ? ".." : ptr_to_const_char

that the PGI compiler handles incorrectly.  It chooses the pointer type
of the first option (either void* or char*) and warns about conversion
of the second without a cast.  Flip the expression logic to

  !test ? ptr_to_const_char : NULL
  !test ? ptr_to_const_char : ".."

to help the compiler choose the proper result type.
This commit is contained in:
Brad King 2012-01-04 11:54:51 -05:00
parent 9ccaeb10f9
commit 65b6e19a35
4 changed files with 6 additions and 6 deletions
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6
Utilities/cmlibarchive/libarchive/archive_options.c
View File

@ -41,9 +41,9 @@ _archive_set_option(struct archive *a,
archive_check_magic(a, magic, ARCHIVE_STATE_NEW, fn);
mp = m != NULL && m[0] == '\0' ? NULL : m;
op = o != NULL && o[0] == '\0' ? NULL : o;
vp = v != NULL && v[0] == '\0' ? NULL : v;
mp = m != NULL && m[0] != '\0' ? m : NULL;
op = o != NULL && o[0] != '\0' ? o : NULL;
vp = v != NULL && v[0] != '\0' ? v : NULL;
if (op == NULL && vp == NULL)
return (ARCHIVE_OK);

2
Utilities/cmlibarchive/libarchive/archive_read.c
View File

@ -902,7 +902,7 @@ static const char *
_archive_filter_name(struct archive *_a, int n)
{
struct archive_read_filter *f = get_filter(_a, n);
return f == NULL ? NULL : f->name;
return f != NULL ? f->name : NULL;
}
static int64_t

2
Utilities/cmlibarchive/libarchive/archive_read_support_format_7zip.c
View File

@ -1095,7 +1095,7 @@ init_decompression(struct archive_read *a, struct _7zip *zip,
}
archive_set_error(&a->archive, err,
"Internal error initializing decompressor: %s",
detail == NULL ? "??" : detail);
detail != NULL ? detail : "??");
zip->bzstream_valid = 0;
return (ARCHIVE_FAILED);
}

2
Utilities/cmlibarchive/libarchive/archive_write.c
View File

@ -698,7 +698,7 @@ static const char *
_archive_filter_name(struct archive *_a, int n)
{
struct archive_write_filter *f = filter_lookup(_a, n);
return f == NULL ? NULL : f->name;
return f != NULL ? f->name : NULL;
}
static int64_t