Re: [libvirt] [PATCH v3 2/9] New functions for virBitmap

In many places we store bitmap info in a chunk of data (pointed to by a char *), and have redundant codes to set/unset bits. This patch extends virBitmap, and convert those codes to use virBitmap in subsequent patches. --- .gitignore | 1 + src/libvirt_private.syms | 11 ++ src/util/bitmap.c | 405 +++++++++++++++++++++++++++++++++++++++++++++- src/util/bitmap.h | 34 ++++ tests/Makefile.am | 7 +- tests/virbitmaptest.c | 362 +++++++++++++++++++++++++++++++++++++++++ 6 files changed, 818 insertions(+), 2 deletions(-) create mode 100644 tests/virbitmaptest.c diff --git a/.gitignore b/.gitignore index d998f0e..1ca537e 100644 --- a/.gitignore +++ b/.gitignore @@ -157,6 +157,7 @@ /tests/utiltest /tests/viratomictest /tests/virauthconfigtest +/tests/virbitmaptest /tests/virbuftest /tests/virdrivermoduletest /tests/virhashtest diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 8dfb4ce..0ad6376 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -7,12 +7,23 @@ # bitmap.h virBitmapAlloc; +virBitmapAllocFromData;

+/** + * virBitmapCopy:

+ * @src: the source bitmap. + * + * Makes a copy of bitmap @src. + * + * returns the copied bitmap on success, or NULL otherwise. Caller + * should call virBitmapFree to free the returned bitmap. + */ +virBitmapPtr virBitmapNewCopy(virBitmapPtr src) +{ + virBitmapPtr dst; + + if ((dst = virBitmapAlloc(src->max_bit)) == NULL) + return NULL; + + if (virBitmapCopy(dst, src) != 0) { + virBitmapFree(dst); + return NULL; + } + + return dst; +} + +/** + * virBitmapAllocFromData: + * @data: the data + * @len: length of @data in bytes + * + * Allocate a bitmap from a chunk of data containing bits + * information + * + * Returns a pointer to the allocated bitmap or NULL if + * memory cannot be allocated. + */ +virBitmapPtr virBitmapAllocFromData(void *data, int len)

+{ + virBitmapPtr bitmap; + int i; + + bitmap = virBitmapAlloc(len * CHAR_BIT); + if (!bitmap) + return NULL; + + memcpy(bitmap->map, data, len); + for (i = 0; i < bitmap->map_len; i++) + bitmap->map[i] = le64toh(bitmap->map[i]); + + return bitmap; +}