len0rd/dtc
1
0
Fork 0
mirror of https://github.com/dgibson/dtc.git synced 2026-10-10 08:03:00 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

fdt: Add a function to get the index of a string

Browse source 
The new fdt_stringlist_search() function will look up a given string in
the list contained in the value of a named property of a given device
tree node and return its index.

Signed-off-by: Thierry Reding <treding@nvidia.com>
[Fix some -Wshadow warnings --dwg]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Thierry Reding 2015-09-29 11:09:07 +02:00 • committed by David Gibson
parent 2218387a8c
commit 8702bd1d3b
3 changed files with 92 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

40
tests/stringlist.c
View file

@ -40,6 +40,24 @@ static void check_expected_failure(const void *fdt, const char *path,
err = fdt_stringlist_count(fdt, offset, "#address-cells");
if (err != -FDT_ERR_BADVALUE)
FAIL("unexpectedly succeeded in parsing #address-cells\n");
err = fdt_stringlist_search(fdt, offset, "#address-cells", "foo");
if (err != -FDT_ERR_BADVALUE)
FAIL("found string in #address-cells: %d\n", err);
/*
* Note that the #address-cells property contains a small 32-bit
* unsigned integer, hence some bytes will be zero, and searching for
* the empty string will succeed.
*
* The reason for this oddity is that the function will exit when the
* first occurrence of the string is found, but in order to determine
* that the property does not contain a valid string list it would
* need to process the whole value.
*/
err = fdt_stringlist_search(fdt, offset, "#address-cells", "");
if (err != 0)
FAIL("empty string not found in #address-cells: %d\n", err);
}
static void check_string_count(const void *fdt, const char *path,
@ -61,6 +79,23 @@ static void check_string_count(const void *fdt, const char *path,
path, property, err, count);
}
static void check_string_index(const void *fdt, const char *path,
const char *property, const char *string,
int idx)
{
int offset, err;
offset = fdt_path_offset(fdt, path);
if (offset < 0)
FAIL("Couldn't find path %s", path);
err = fdt_stringlist_search(fdt, offset, property, string);
if (err != idx)
FAIL("Index of %s in property %s of node %s is %d, expected %d\n",
string, property, path, err, idx);
}
int main(int argc, char *argv[])
{
void *fdt;
@ -78,5 +113,10 @@ int main(int argc, char *argv[])
check_string_count(fdt, "/device", "compatible", 2);
check_string_count(fdt, "/device", "big-endian", 0);
check_string_index(fdt, "/", "compatible", "test-strings", 0);
check_string_index(fdt, "/device", "compatible", "foo", 0);
check_string_index(fdt, "/device", "compatible", "bar", 1);
check_string_index(fdt, "/device", "big-endian", "baz", -1);
PASS();
}