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authorMatt A. Tobin <email@mattatobin.com>2019-11-03 00:17:46 -0400
committerMatt A. Tobin <email@mattatobin.com>2019-11-03 00:17:46 -0400
commit302bf1b523012e11b60425d6eee1221ebc2724eb (patch)
treeb191a895f8716efcbe42f454f37597a545a6f421 /mailnews/import/src/nsImportScanFile.cpp
parent21b3f6247403c06f85e1f45d219f87549862198f (diff)
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Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1
Diffstat (limited to 'mailnews/import/src/nsImportScanFile.cpp')
-rw-r--r--mailnews/import/src/nsImportScanFile.cpp172
1 files changed, 172 insertions, 0 deletions
diff --git a/mailnews/import/src/nsImportScanFile.cpp b/mailnews/import/src/nsImportScanFile.cpp
new file mode 100644
index 000000000..c4eefef3b
--- /dev/null
+++ b/mailnews/import/src/nsImportScanFile.cpp
@@ -0,0 +1,172 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nscore.h"
+#include "nsIFile.h"
+#include "nsImportScanFile.h"
+#include "ImportCharSet.h"
+
+nsImportScanFile::nsImportScanFile()
+{
+ m_allocated = false;
+ m_eof = false;
+ m_pBuf = nullptr;
+}
+
+nsImportScanFile::~nsImportScanFile()
+{
+ if (m_allocated)
+ CleanUpScan();
+}
+
+void nsImportScanFile::InitScan(nsIInputStream *pInputStream, uint8_t * pBuf, uint32_t sz)
+{
+ m_pInputStream = pInputStream;
+ m_pBuf = pBuf;
+ m_bufSz = sz;
+ m_bytesInBuf = 0;
+ m_pos = 0;
+}
+
+void nsImportScanFile::CleanUpScan(void)
+{
+ m_pInputStream = nullptr;
+ if (m_allocated) {
+ delete [] m_pBuf;
+ m_pBuf = NULL;
+ }
+}
+
+void nsImportScanFile::ShiftBuffer(void)
+{
+ uint8_t * pTop;
+ uint8_t * pCurrent;
+
+ if (m_pos < m_bytesInBuf) {
+ pTop = m_pBuf;
+ pCurrent = pTop + m_pos;
+ uint32_t cnt = m_bytesInBuf - m_pos;
+ while (cnt) {
+ *pTop = *pCurrent;
+ pTop++; pCurrent++;
+ cnt--;
+ }
+ }
+
+ m_bytesInBuf -= m_pos;
+ m_pos = 0;
+}
+
+bool nsImportScanFile::FillBufferFromFile(void)
+{
+ uint64_t available;
+ nsresult rv = m_pInputStream->Available(&available);
+ if (NS_FAILED(rv))
+ return false;
+
+ // Fill up a buffer and scan it
+ ShiftBuffer();
+
+ // Read in some more bytes
+ uint32_t cnt = m_bufSz - m_bytesInBuf;
+ // To distinguish from disk errors
+ // Check first for end of file?
+ // Set a done flag if true...
+ uint32_t read;
+ char *pBuf = (char *)m_pBuf;
+ pBuf += m_bytesInBuf;
+ rv = m_pInputStream->Read(pBuf, (int32_t) cnt, &read);
+
+ if (NS_FAILED(rv))
+ return false;
+ rv = m_pInputStream->Available(&available);
+ if (NS_FAILED(rv))
+ m_eof = true;
+
+ m_bytesInBuf += cnt;
+ return true;
+}
+
+bool nsImportScanFile::Scan(bool *pDone)
+{
+ uint64_t available;
+ nsresult rv = m_pInputStream->Available(&available);
+ if (NS_FAILED(rv))
+ {
+ if (m_pos < m_bytesInBuf)
+ ScanBuffer(pDone);
+ *pDone = true;
+ return true;
+ }
+
+ // Fill up a buffer and scan it
+ if (!FillBufferFromFile())
+ return false;
+
+ return ScanBuffer(pDone);
+}
+
+bool nsImportScanFile::ScanBuffer(bool *)
+{
+ return true;
+}
+
+
+bool nsImportScanFileLines::ScanBuffer(bool *pDone)
+{
+ // m_pos, m_bytesInBuf, m_eof, m_pBuf are relevant
+
+ uint32_t pos = m_pos;
+ uint32_t max = m_bytesInBuf;
+ uint8_t * pChar = m_pBuf + pos;
+ uint32_t startPos;
+
+ while (pos < max) {
+ if (m_needEol) {
+ // Find the next eol...
+ while ((pos < max) && (*pChar != ImportCharSet::cCRChar) && (*pChar != ImportCharSet::cLinefeedChar)) {
+ pos++;
+ pChar++;
+ }
+ m_pos = pos;
+ if (pos < max)
+ m_needEol = false;
+ if (pos == max) // need more buffer for an end of line
+ break;
+ }
+ // Skip past any eol characters
+ while ((pos < max) && ((*pChar == ImportCharSet::cCRChar) || (*pChar == ImportCharSet::cLinefeedChar))) {
+ pos++;
+ pChar++;
+ }
+ m_pos = pos;
+ if (pos == max)
+ break;
+ // Make sure we can find either the eof or the
+ // next end of line
+ startPos = pos;
+ while ((pos < max) && (*pChar != ImportCharSet::cCRChar) && (*pChar != ImportCharSet::cLinefeedChar)) {
+ pos++;
+ pChar++;
+ }
+
+ // Is line too big for our buffer?
+ if ((pos == max) && !m_eof) {
+ if (!m_pos) { // line too big for our buffer
+ m_pos = pos;
+ m_needEol = true;
+ }
+ break;
+ }
+
+ if (!ProcessLine(m_pBuf + startPos, pos - startPos, pDone)) {
+ return false;
+ }
+ m_pos = pos;
+ }
+
+ return true;
+}
+