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authorTom Sepez <tsepez@chromium.org>2018-04-12 18:33:55 +0000
committerChromium commit bot <commit-bot@chromium.org>2018-04-12 18:33:55 +0000
commit154e18f9a862975abecebe77b8f5fb418418d14c (patch)
tree18e9381c1a4324abcd98296e1e1714c2f926e006 /xfa/fxfa/parser/cxfa_localevalue.cpp
parent7f821c11081fe90346823333622253ec7949b583 (diff)
downloadpdfium-154e18f9a862975abecebe77b8f5fb418418d14c.tar.xz
Return pdfium::span<wchar_t> from WideString::GetBuffer().
Adds bounds checking "for free", but beware of span outliving a ReleaseBuffer() call. Scoping as such avoids the possibility of using an invalid span (and it is flagged as a lifetime issue). Change-Id: Ica63f4b1429823d0254ec6951aeaeb08160cb93c Reviewed-on: https://pdfium-review.googlesource.com/30310 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
Diffstat (limited to 'xfa/fxfa/parser/cxfa_localevalue.cpp')
-rw-r--r--xfa/fxfa/parser/cxfa_localevalue.cpp44
1 files changed, 23 insertions, 21 deletions
diff --git a/xfa/fxfa/parser/cxfa_localevalue.cpp b/xfa/fxfa/parser/cxfa_localevalue.cpp
index 8ef67e5183..b129960f7d 100644
--- a/xfa/fxfa/parser/cxfa_localevalue.cpp
+++ b/xfa/fxfa/parser/cxfa_localevalue.cpp
@@ -682,32 +682,34 @@ void CXFA_LocaleValue::GetNumericFormat(WideString& wsFormat,
int32_t nDecLen) {
ASSERT(wsFormat.IsEmpty());
ASSERT(nIntLen >= -1 && nDecLen >= -1);
-
int32_t nTotalLen = (nIntLen >= 0 ? nIntLen : 2) + 1 +
(nDecLen >= 0 ? nDecLen : 2) + (nDecLen == 0 ? 0 : 1);
- wchar_t* lpBuf = wsFormat.GetBuffer(nTotalLen);
- int32_t nPos = 0;
- lpBuf[nPos++] = L's';
-
- if (nIntLen == -1) {
- lpBuf[nPos++] = L'z';
- lpBuf[nPos++] = L'*';
- } else {
- while (nIntLen) {
+ {
+ // Span's lifetime must end before ReleaseBuffer() below.
+ pdfium::span<wchar_t> lpBuf = wsFormat.GetBuffer(nTotalLen);
+ int32_t nPos = 0;
+ lpBuf[nPos++] = L's';
+
+ if (nIntLen == -1) {
lpBuf[nPos++] = L'z';
- nIntLen--;
+ lpBuf[nPos++] = L'*';
+ } else {
+ while (nIntLen) {
+ lpBuf[nPos++] = L'z';
+ nIntLen--;
+ }
}
- }
- if (nDecLen != 0) {
- lpBuf[nPos++] = L'.';
- }
- if (nDecLen == -1) {
- lpBuf[nPos++] = L'z';
- lpBuf[nPos++] = L'*';
- } else {
- while (nDecLen) {
+ if (nDecLen != 0) {
+ lpBuf[nPos++] = L'.';
+ }
+ if (nDecLen == -1) {
lpBuf[nPos++] = L'z';
- nDecLen--;
+ lpBuf[nPos++] = L'*';
+ } else {
+ while (nDecLen) {
+ lpBuf[nPos++] = L'z';
+ nDecLen--;
+ }
}
}
wsFormat.ReleaseBuffer(nTotalLen);