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dtc: Add support for binary includes.

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On Wed, Jun 04, 2008 at 09:26:23AM -0500, Jon Loeliger wrote:
> David Gibson wrote:
>
>> But as I said that can be dealt with in the future without breaking
>> compatibility.  Objection withdrawn.
>>
>
> And on that note, I officially implore Scott to
> re-submit his binary include patch!

Scott's original patch does still have some implementation details I
didn't like.  So in the interests of saving time, I've addressed some
of those, added a testcase, and and now resubmitting my revised
version of Scott's patch.

dtc: Add support for binary includes.

A property's data can be populated with a file's contents
as follows:

node {
	prop = /incbin/("path/to/data");
};

A subset of a file can be included by passing start and size parameters.
For example, to include bytes 8 through 23:

node {
	prop = /incbin/("path/to/data", 8, 16);
};

As with /include/, non-absolute paths are looked for in the directory
of the source file that includes them.

Implementation revised, and a testcase added by David Gibson

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
David Gibson
2008-06-11 11:58:39 +10:00
committed by Jon Loeliger
parent 050e6f0cff
commit e37ec7d588
8 changed files with 145 additions and 6 deletions
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25
data.c
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@@ -167,14 +167,29 @@ struct data data_copy_escape_string(const char *s, int len)
return d;
}
struct data data_copy_file(FILE *f, size_t len)
struct data data_copy_file(FILE *f, size_t maxlen)
{
struct data d;
struct data d = empty_data;
d = data_grow_for(empty_data, len);
while (!feof(f) && (d.len < maxlen)) {
size_t chunksize, ret;
d.len = len;
fread(d.val, len, 1, f);
if (maxlen == -1)
chunksize = 4096;
else
chunksize = maxlen - d.len;
d = data_grow_for(d, chunksize);
ret = fread(d.val + d.len, 1, chunksize, f);
if (ferror(f))
die("Error reading file into data: %s", strerror(errno));
if (d.len + ret < d.len)
die("Overflow reading file into data\n");
d.len += ret;
}
return d;
}