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hotfix: fixes seq.add and str.add for edge cases

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This commit is contained in:
Andreas Rumpf
2017-09-16 10:56:28 +02:00
parent 2b592a6425
commit e7bcadaf32
1 changed files with 12 additions and 8 deletions
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20
lib/system/sysstr.nim
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@@ -140,9 +140,10 @@ proc addChar(s: NimString, c: char): NimString =
# is compilerproc!
result = s
if result.len >= result.space:
result.reserved = resize(result.space)
let r = resize(result.space)
result = cast[NimString](growObj(result,
sizeof(TGenericSeq) + result.reserved + 1))
sizeof(TGenericSeq) + r + 1))
result.reserved = r
result.data[result.len] = c
result.data[result.len+1] = '\0'
inc(result.len)
@@ -218,26 +219,29 @@ proc incrSeq(seq: PGenericSeq, elemSize: int): PGenericSeq {.compilerProc.} =
# seq[seq->len-1] = x;
result = seq
if result.len >= result.space:
result.reserved = resize(result.space)
result = cast[PGenericSeq](growObj(result, elemSize * result.reserved +
let r = resize(result.space)
result = cast[PGenericSeq](growObj(result, elemSize * r +
GenericSeqSize))
result.reserved = r
inc(result.len)
proc incrSeqV2(seq: PGenericSeq, elemSize: int): PGenericSeq {.compilerProc.} =
# incrSeq version 2
result = seq
if result.len >= result.space:
result.reserved = resize(result.space)
result = cast[PGenericSeq](growObj(result, elemSize * result.reserved +
let r = resize(result.space)
result = cast[PGenericSeq](growObj(result, elemSize * r +
GenericSeqSize))
result.reserved = r
proc setLengthSeq(seq: PGenericSeq, elemSize, newLen: int): PGenericSeq {.
compilerRtl.} =
result = seq
if result.space < newLen:
result.reserved = max(resize(result.space), newLen)
result = cast[PGenericSeq](growObj(result, elemSize * result.reserved +
let r = max(resize(result.space), newLen)
result = cast[PGenericSeq](growObj(result, elemSize * r +
GenericSeqSize))
result.reserved = r
elif newLen < result.len:
# we need to decref here, otherwise the GC leaks!
when not defined(boehmGC) and not defined(nogc) and