diff options
Diffstat (limited to 'core/container/bit_array/bit_array.odin')
| -rw-r--r-- | core/container/bit_array/bit_array.odin | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/core/container/bit_array/bit_array.odin b/core/container/bit_array/bit_array.odin index 61119ef96..b1149e82e 100644 --- a/core/container/bit_array/bit_array.odin +++ b/core/container/bit_array/bit_array.odin @@ -1,5 +1,6 @@ package container_dynamic_bit_array +import "base:builtin" import "base:intrinsics" import "core:mem" @@ -299,6 +300,35 @@ clear :: proc(ba: ^Bit_Array) { mem.zero_slice(ba.bits[:]) } /* +Shrinks the Bit_Array's backing storage to the smallest possible size. + +Inputs: +- ba: The target Bit_Array +*/ +shrink :: proc(ba: ^Bit_Array) #no_bounds_check { + if ba == nil { return } + legs_needed := len(ba.bits) + for i := legs_needed - 1; i >= 0; i -= 1 { + if ba.bits[i] == 0 { + legs_needed -= 1 + } else { + break + } + } + if legs_needed == len(ba.bits) { + return + } + ba.max_index = 0 + if legs_needed > 0 { + if legs_needed > 1 { + ba.max_index = (legs_needed - 1) * NUM_BITS + } + ba.max_index += NUM_BITS - 1 - int(intrinsics.count_leading_zeros(ba.bits[legs_needed - 1])) + } + resize(&ba.bits, legs_needed) + builtin.shrink(&ba.bits) +} +/* Deallocates the Bit_Array and its backing storage Inputs: |