mirrors/Nim
1
0
Fork 0
mirror of https://github.com/nim-lang/Nim.git synced 2026-05-03 12:34:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

fixes #16365 [backport] (#16381)

Browse Source 
(cherry picked from commit 868c31e88a)
This commit is contained in:
Andreas Rumpf
2020-12-17 23:21:55 +01:00
committed by narimiran
parent 265499ee57
commit c9d7c67acb
2 changed files with 38 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
lib/system/strs_v2.nim
View File

@@ -40,21 +40,22 @@ proc resize(old: int): int {.inline.} =
else: result = old * 3 div 2 # for large arrays * 3/2 is better
proc prepareAdd(s: var NimStringV2; addlen: int) {.compilerRtl.} =
let newLen = s.len + addlen
if isLiteral(s):
let oldP = s.p
# can't mutate a literal, so we need a fresh copy here:
when compileOption("threads"):
s.p = cast[ptr NimStrPayload](allocShared0(contentSize(s.len + addlen)))
s.p = cast[ptr NimStrPayload](allocShared0(contentSize(newLen)))
else:
s.p = cast[ptr NimStrPayload](alloc0(contentSize(s.len + addlen)))
s.p.cap = s.len + addlen
s.p = cast[ptr NimStrPayload](alloc0(contentSize(newLen)))
s.p.cap = newLen
if s.len > 0:
# we are about to append, so there is no need to copy the \0 terminator:
copyMem(unsafeAddr s.p.data[0], unsafeAddr oldP.data[0], s.len)
copyMem(unsafeAddr s.p.data[0], unsafeAddr oldP.data[0], min(s.len, newLen))
else:
let oldCap = s.p.cap and not strlitFlag
if s.len + addlen > oldCap:
let newCap = max(s.len + addlen, resize(oldCap))
if newLen > oldCap:
let newCap = max(newLen, resize(oldCap))
when compileOption("threads"):
s.p = cast[ptr NimStrPayload](reallocShared0(s.p, contentSize(oldCap), contentSize(newCap)))
else: