KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

compiler/blob: Allow for fixed-size blobs with a NULL data pointer 

These can be used to easily count up the number of bytes that will be
required by "writing" it into the NULL blob.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
This commit is contained in:
Jason Ekstrand 2017-10-12 21:02:48 -07:00
parent 26f6d4e5c7
commit 8ae03af4ed
2 changed files with 10 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/compiler/blob.c
View File

@ -91,7 +91,8 @@ align_blob(struct blob *blob, size_t alignment)
if (!grow_to_fit(blob, new_size - blob->size))
return false;
memset(blob->data + blob->size, 0, new_size - blob->size);
if (blob->data)
memset(blob->data + blob->size, 0, new_size - blob->size);
blob->size = new_size;
}
@ -136,7 +137,8 @@ blob_overwrite_bytes(struct blob *blob,
VG(VALGRIND_CHECK_MEM_IS_DEFINED(bytes, to_write));
memcpy(blob->data + offset, bytes, to_write);
if (blob->data)
memcpy(blob->data + offset, bytes, to_write);
return true;
}
@ -149,7 +151,8 @@ blob_write_bytes(struct blob *blob, const void *bytes, size_t to_write)
VG(VALGRIND_CHECK_MEM_IS_DEFINED(bytes, to_write));
memcpy(blob->data + blob->size, bytes, to_write);
if (blob->data)
memcpy(blob->data + blob->size, bytes, to_write);
blob->size += to_write;
return true;

4
src/compiler/blob.h
View File

@ -96,6 +96,10 @@ blob_init(struct blob *blob);
* A fixed-size blob has a fixed block of data that will not be freed on
* blob_finish and will never be grown. If we hit the end, we simply start
* returning false from the write functions.
*
* If a fixed-size blob has a NULL data pointer then the data is written but
* it otherwise operates normally. This can be used to determine the size
* that will be required to write a given data structure.
*/
void
blob_init_fixed(struct blob *blob, void *data, size_t size);