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Diffstat (limited to 'packages/taler-util/src/taler-crypto.ts')
-rw-r--r-- | packages/taler-util/src/taler-crypto.ts | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/packages/taler-util/src/taler-crypto.ts b/packages/taler-util/src/taler-crypto.ts index d7e9a0c06..b4b96afbc 100644 --- a/packages/taler-util/src/taler-crypto.ts +++ b/packages/taler-util/src/taler-crypto.ts @@ -1025,6 +1025,23 @@ export namespace AgeRestriction { return count; } + /** + * Get the starting points for age groups in the mask. + */ + export function getAgeGroupsFromMask(mask: number): number[] { + const groups: number[] = []; + let age = 1; + let m = mask >> 1; + while (m > 0) { + if (m & 1) { + groups.push(age); + } + m = m >> 1; + age++; + } + return groups; + } + export function getAgeGroupIndex(mask: number, age: number): number { invariant((mask & 1) === 1); let i = 0; |