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| author | Michael Brown | 2024-01-19 13:29:29 +0100 |
|---|---|---|
| committer | Michael Brown | 2024-01-19 13:29:29 +0100 |
| commit | 13e390d54edde17c8e22b0f6d8897c273a91c5d0 (patch) | |
| tree | 1c10cef32907d68686cee4a8a2ec68a7a51b5d10 /src/include | |
| parent | [crypto] Allow multiplicand and multiplier to differ in size (diff) | |
| download | ipxe-13e390d54edde17c8e22b0f6d8897c273a91c5d0.tar.gz ipxe-13e390d54edde17c8e22b0f6d8897c273a91c5d0.tar.xz ipxe-13e390d54edde17c8e22b0f6d8897c273a91c5d0.zip | |
[crypto] Add bigint_copy() as a convenient wrapper macro
Big integers may be efficiently copied using bigint_shrink() (which
will always copy only the size of the destination integer), but this
is potentially confusing to a reader of the code.
Provide bigint_copy() as an alias for bigint_shrink() so that the
intention of the calling code may be more obvious.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include')
| -rw-r--r-- | src/include/ipxe/bigint.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/include/ipxe/bigint.h b/src/include/ipxe/bigint.h index 36138dd64..820d306b8 100644 --- a/src/include/ipxe/bigint.h +++ b/src/include/ipxe/bigint.h @@ -8,6 +8,8 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); +#include <assert.h> + /** * Define a big-integer type * @@ -177,6 +179,17 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); } while ( 0 ) /** + * Copy big integer + * + * @v source Source big integer + * @v dest Destination big integer + */ +#define bigint_copy( source, dest ) do { \ + build_assert ( sizeof ( *(source) ) == sizeof ( *(dest) ) ); \ + bigint_shrink ( (source), (dest) ); \ + } while ( 0 ) + +/** * Multiply big integers * * @v multiplicand Big integer to be multiplied |