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Merge pull request #2164 from oderwat/fix-tohex

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Fixing toHex() to not wrap for long lens + Test
This commit is contained in:
Andreas Rumpf
2015-02-19 09:12:50 +01:00
parent a8acb5ec65 a471b3c87f
commit 43c023c8dd
2 changed files with 32 additions and 27 deletions
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8
lib/pure/strutils.nim
View File

@@ -395,11 +395,13 @@ proc toHex*(x: BiggestInt, len: int): string {.noSideEffect,
const
HexChars = "0123456789ABCDEF"
var
shift: BiggestInt
n = x
result = newString(len)
for j in countdown(len-1, 0):
result[j] = HexChars[toU32(x shr shift) and 0xF'i32]
shift = shift + 4
result[j] = HexChars[n and 0xF]
n = n shr 4
# handle negative overflow
if n == 0 and x < 0: n = -1
proc intToStr*(x: int, minchars: int = 1): string {.noSideEffect,
rtl, extern: "nsuIntToStr".} =

51
tests/stdlib/tstrutil.nim
View File

@@ -2,18 +2,18 @@ discard """
file: "tstrutil.nim"
output: "ha/home/a1xyz/usr/bin"
"""
# test the new strutils module
import
strutils
proc testStrip() =
write(stdout, strip(" ha "))
proc main() =
testStrip()
for p in split("/home/a1:xyz:/usr/bin", {':'}):
write(stdout, p)
# test the new strutils module
import
strutils
proc testStrip() =
write(stdout, strip(" ha "))
proc main() =
testStrip()
for p in split("/home/a1:xyz:/usr/bin", {':'}):
write(stdout, p)
proc testDelete =
var s = "0123456789ABCDEFGH"
@@ -25,25 +25,28 @@ proc testDelete =
assert s == "1236789ABCDEFG"
testDelete()
assert(insertSep($1000_000) == "1_000_000")
assert(insertSep($232) == "232")
assert(insertSep($12345, ',') == "12,345")
assert(insertSep($0) == "0")
assert(editDistance("prefix__hallo_suffix", "prefix__hallo_suffix") == 0)
assert(editDistance("prefix__hallo_suffix", "prefix__hallo_suffi1") == 1)
assert(editDistance("prefix__hallo_suffix", "prefix__HALLO_suffix") == 5)
assert(editDistance("prefix__hallo_suffix", "prefix__ha_suffix") == 3)
assert(editDistance("prefix__hallo_suffix", "prefix") == 14)
assert(editDistance("prefix__hallo_suffix", "suffix") == 14)
assert(editDistance("prefix__hallo_suffix", "prefix__hao_suffix") == 2)
assert(editDistance("prefix__hallo_suffix", "prefix__hallo_suffix") == 0)
assert(editDistance("prefix__hallo_suffix", "prefix__hallo_suffi1") == 1)
assert(editDistance("prefix__hallo_suffix", "prefix__HALLO_suffix") == 5)
assert(editDistance("prefix__hallo_suffix", "prefix__ha_suffix") == 3)
assert(editDistance("prefix__hallo_suffix", "prefix") == 14)
assert(editDistance("prefix__hallo_suffix", "suffix") == 14)
assert(editDistance("prefix__hallo_suffix", "prefix__hao_suffix") == 2)
assert "/1/2/3".rfind('/') == 4
assert "/1/2/3".rfind('/', 1) == 0
assert "/1/2/3".rfind('0') == -1
main()
#OUT ha/home/a1xyz/usr/bin
assert(toHex(100i16, 32) == "00000000000000000000000000000064")
assert(toHex(-100i16, 32) == "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFF9C")
main()
#OUT ha/home/a1xyz/usr/bin