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bf: rename to bitfield

pull/1900/head
Alexander Medvednikov 2019-09-08 17:45:51 +03:00
parent 71224ad17c
commit ae866260c8
2 changed files with 10 additions and 10 deletions
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18
vlib/bf/bf.v → vlib/bitfield/bitfield.v
View File

@ -1,7 +1,7 @@
module bf module bitfield
/* /*
bf (BitField) is a module (shared library for V programming language) for bitfield is a module for
manipulating arrays of bits, i.e. series of zeroes and ones spread across an manipulating arrays of bits, i.e. series of zeroes and ones spread across an
array of storage units (unsigned 32-bit integers). array of storage units (unsigned 32-bit integers).
@ -20,7 +20,7 @@ mut:
field []u32 field []u32
} }
// helper functions // helper functions
const ( const (
SLOT_SIZE = 32 SLOT_SIZE = 32
) )
@ -63,19 +63,19 @@ fn min(input1 int, input2 int) int {
fn bitnslots(length int) int { fn bitnslots(length int) int {
return (length - 1) / SLOT_SIZE + 1 return (length - 1) / SLOT_SIZE + 1
} }
fn cleartail(instance mut BitField) { fn cleartail(instance mut BitField) {
tail := instance.size % SLOT_SIZE tail := instance.size % SLOT_SIZE
if tail != 0 { if tail != 0 {
// create a mask for the tail // create a mask for the tail
mask := u32((1 << tail) - 1) mask := u32((1 << tail) - 1)
// clear the extra bits // clear the extra bits
instance.field[bitnslots(instance.size) - 1] = instance.field[bitnslots(instance.size) - 1] & mask instance.field[bitnslots(instance.size) - 1] = instance.field[bitnslots(instance.size) - 1] & mask
} }
} }
// public functions // public functions
// str2bf() converts a string of characters ('0' and '1') to a bit // str2bf() converts a string of characters ('0' and '1') to a bit
// array. Any character different from '0' is treated as '1'. // array. Any character different from '0' is treated as '1'.
@ -110,7 +110,7 @@ pub fn (input BitField) string() string {
pub fn new(size int) BitField { pub fn new(size int) BitField {
output := BitField{ output := BitField{
size: size size: size
//field: *u32(calloc(bitnslots(size) * SLOT_SIZE / 8)) //field: *u32(calloc(bitnslots(size) * SLOT_SIZE / 8))
field: [u32(0); bitnslots(size)] field: [u32(0); bitnslots(size)]
} }
@ -383,7 +383,7 @@ pub fn (haystack BitField) pos(needle BitField) int {
return -1 return -1
} }
// slice() return a sub-array of bits between 'start_bit_nr' (included) and // slice() return a sub-array of bits between 'start_bit_nr' (included) and
// 'end_bit_nr' (excluded) // 'end_bit_nr' (excluded)
pub fn (input BitField) slice(_start int, _end int) BitField { pub fn (input BitField) slice(_start int, _end int) BitField {

2
vlib/bf/bf_test.v → vlib/bitfield/bitfield_test.v
View File

@ -1,4 +1,4 @@
import bf import bitfield
import rand import rand
import time import time