From: Fabien Parent <fparent@xxxxxxxxxxxx>
Add constraints on array size:
- length: specify the exact length that an array must have.
- min-length: specify the minimum number of elements an array must have.
- max-length: specify the maximum number of elements an array must have.
Add as well four test files for the feature.
Usage example:
node {
compatible = "array_size";
myarray = <0 1 2 3 4>;
};
Schema:
/dts-v1/;
/ {
compatible = "array_size";
myarray {
length = <5>;
};
};
Signed-off-by: Fabien Parent <fparent@xxxxxxxxxxxx>
Signed-off-by: Benoit Cousson <bcousson@xxxxxxxxxxxx>
---
scripts/dtc/data.c | 5 +++
scripts/dtc/dtc.h | 1 +
scripts/dtc/schema-test.c | 10 ++++++
scripts/dtc/schema.c | 52 +++++++++++++++++++++++++++
scripts/dtc/tests/schemas/array-size-1.schema | 13 +++++++
scripts/dtc/tests/schemas/array-size-2.schema | 8 +++++
scripts/dtc/tests/schemas/array-size-3.schema | 8 +++++
scripts/dtc/tests/schemas/array-size-4.schema | 8 +++++
8 files changed, 105 insertions(+)
create mode 100644 scripts/dtc/tests/schemas/array-size-1.schema
create mode 100644 scripts/dtc/tests/schemas/array-size-2.schema
create mode 100644 scripts/dtc/tests/schemas/array-size-3.schema
create mode 100644 scripts/dtc/tests/schemas/array-size-4.schema
diff --git a/scripts/dtc/data.c b/scripts/dtc/data.c
index 9e03718..5284936 100644
--- a/scripts/dtc/data.c
+++ b/scripts/dtc/data.c
@@ -76,6 +76,7 @@ struct data data_copy_escape_string(const char *s, int len)
d = data_grow_for(empty_data, strlen(s)+1);
d.type = STRING;
+ d.array_size++;
q = d.val;
while (i < len) {
@@ -95,6 +96,7 @@ struct data data_copy_file(FILE *f, size_t maxlen)
{
struct data d = empty_data;
d.type = STRING;
+ d.array_size++;
while (!feof(f) && (d.len < maxlen)) {
size_t chunksize, ret;
@@ -159,6 +161,7 @@ struct data data_merge(struct data d1, struct data d2)
struct marker *m2 = d2.markers;
d = data_append_markers(data_append_data(d1, d2.val, d2.len), m2);
+ d.array_size += d2.array_size;
d.type = d2.type ? d2.type : d1.type;
/* Adjust for the length of d1 */
@@ -204,6 +207,7 @@ struct data data_append_integer(struct data d, uint64_t value, int bits)
}
d.type = INTEGER;
+ d.array_size++;
return d;
}
@@ -231,6 +235,7 @@ struct data data_append_byte(struct data d, uint8_t byte)
{
d = data_append_data(d, &byte, 1);
d.type = INTEGER;
+ d.array_size++;
return d;
}
diff --git a/scripts/dtc/dtc.h b/scripts/dtc/dtc.h
index a9b8602..64fdc8a 100644
--- a/scripts/dtc/dtc.h
+++ b/scripts/dtc/dtc.h
@@ -95,6 +95,7 @@ struct data {
struct marker *markers;
enum datatype type;
+ size_t array_size;
};
diff --git a/scripts/dtc/schema-test.c b/scripts/dtc/schema-test.c
index 99a4142..bfc9e43 100644
--- a/scripts/dtc/schema-test.c
+++ b/scripts/dtc/schema-test.c
@@ -35,6 +35,16 @@ static struct schema_test tests[] = {
"tests/schemas/types-1.schema", 1},
{"Types #2", "tests/test1.dts",
"tests/schemas/types-2.schema", 0},
+
+ /* Array Size */
+ {"Array Size #1", "tests/test1.dts",
+ "tests/schemas/array-size-1.schema", 1},
+ {"Array Size #2", "tests/test1.dts",
+ "tests/schemas/array-size-2.schema", 0},
+ {"Array Size #3", "tests/test1.dts",
+ "tests/schemas/array-size-3.schema", 0},
+ {"Array Size #4", "tests/test1.dts",
+ "tests/schemas/array-size-4.schema", 0},
};
int main(void)
diff --git a/scripts/dtc/schema.c b/scripts/dtc/schema.c
index 95fc44b..95ad925 100644
--- a/scripts/dtc/schema.c
+++ b/scripts/dtc/schema.c
@@ -5,6 +5,7 @@
#include <dirent.h>
#include <pcre.h>
#include <stdio.h>
+#include <limits.h>
#define DT_ERROR(path, p, format, ...) \
do { \
@@ -36,6 +37,8 @@ struct prop_constraints {
char *type;
int is_required;
int can_be_inherited;
+ size_t min_length;
+ size_t max_length;
};
struct node_constraints {
@@ -73,6 +76,28 @@ static pcre *compile_pattern(const char *pattern)
return re;
}
+static uint32_t prop_val_to_uint32(struct property *p, int i)
+{
+ assert(p);
+ assert(i >= 0);
+
+ switch (p->val.len / p->val.array_size) {
+ case 1:
+ return ((uint8_t *) p->val.val)[i];
+
+ case 2:
+ return fdt16_to_cpu(((uint16_t *) p->val.val)[i]);
+
+ case 4:
+ return fdt32_to_cpu(((uint32_t *) p->val.val)[i]);
+
+ default:
+ die("reach unreachable.");
+ }
+
+ return 0;
+}
+
static int get_next_string_offset(struct property *p, int offset)
{
assert(p);
@@ -203,6 +228,7 @@ load_property_constraints(struct node *schema)
pc->is_required = get_property(schema, "is-required") != NULL;
pc->can_be_inherited = get_property(schema, "can-be-inherited") != NULL;
+ pc->max_length = ULONG_MAX;
p = get_property(schema, "name");
if (p)
@@ -212,6 +238,24 @@ load_property_constraints(struct node *schema)
if (p)
pc->type = p->val.val;
+ p = get_property(schema, "length");
+ if (p) {
+ assert(p->val.type == INTEGER);
+ pc->min_length = pc->max_length = prop_val_to_uint32(p, 0);
+ }
+
+ p = get_property(schema, "min-length");
+ if (p) {
+ assert(p->val.type == INTEGER);
+ pc->min_length = prop_val_to_uint32(p, 0);
+ }
+
+ p = get_property(schema, "max-length");
+ if (p) {
+ assert(p->val.type == INTEGER);
+ pc->max_length = prop_val_to_uint32(p, 0);
+ }
+
return pc;
}
@@ -280,6 +324,14 @@ static int validate_property(struct node *n,
"the following type: '%s'\n", pc->type);
}
+ if (p->val.array_size < pc->min_length
+ || p->val.array_size > pc->max_length) {
+ DT_ERROR(path, p, "Incorrect number of elements.\n"
+ "\tShould have between %zu and %zu "
+ "but has %zu elements.\n", pc->min_length,
+ pc->max_length, p->val.array_size);
+ }
+
end:
free_property_constraints(pc);
return ret;
diff --git a/scripts/dtc/tests/schemas/array-size-1.schema b/scripts/dtc/tests/schemas/array-size-1.schema
new file mode 100644
index 0000000..b495090
--- /dev/null
+++ b/scripts/dtc/tests/schemas/array-size-1.schema
@@ -0,0 +1,13 @@
+/dts-v1/;
+/ {
+ compatible = "compat1";
+
+ mypropstr {
+ length = <3>;
+ };
+
+ mypropstr {
+ min-length = <2>;
+ max-length = <3>;
+ };
+};
diff --git a/scripts/dtc/tests/schemas/array-size-2.schema b/scripts/dtc/tests/schemas/array-size-2.schema
new file mode 100644
index 0000000..cd49361
--- /dev/null
+++ b/scripts/dtc/tests/schemas/array-size-2.schema
@@ -0,0 +1,8 @@
+/dts-v1/;
+/ {
+ compatible = "compat1";
+
+ mypropstr {
+ length = <4>;
+ };
+};
diff --git a/scripts/dtc/tests/schemas/array-size-3.schema b/scripts/dtc/tests/schemas/array-size-3.schema
new file mode 100644
index 0000000..c9cf285
--- /dev/null
+++ b/scripts/dtc/tests/schemas/array-size-3.schema
@@ -0,0 +1,8 @@
+/dts-v1/;
+/ {
+ compatible = "compat1";
+
+ mypropint {
+ max-length = <2>;
+ };
+};
diff --git a/scripts/dtc/tests/schemas/array-size-4.schema b/scripts/dtc/tests/schemas/array-size-4.schema
new file mode 100644
index 0000000..e3a9775
--- /dev/null
+++ b/scripts/dtc/tests/schemas/array-size-4.schema
@@ -0,0 +1,8 @@
+/dts-v1/;
+/ {
+ compatible = "compat1";
+
+ mypropint {
+ min-length = <7>;
+ };
+};
--
1.8.1.2
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