Issue #1258 - Part 1: Import mailnews, ldap, and mork from comm-esr52.9.1

1 files changed, 228 insertions, 0 deletions

diff --git a/mailnews/intl/nsUTF7ToUnicode.cpp b/mailnews/intl/nsUTF7ToUnicode.cpp
new file mode 100644
index 000000000..201bcccb9
--- /dev/null
+++ b/mailnews/intl/nsUTF7ToUnicode.cpp
@@ -0,0 +1,228 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "nsUTF7ToUnicode.h"
+
+#define ENC_DIRECT      0
+#define ENC_BASE64      1
+
+//----------------------------------------------------------------------
+// Class nsBasicUTF7Decoder [implementation]
+
+nsBasicUTF7Decoder::nsBasicUTF7Decoder(char aLastChar, char aEscChar)
+: nsBufferDecoderSupport(1)
+{
+  mLastChar = aLastChar;
+  mEscChar = aEscChar;
+  Reset();
+}
+
+nsresult nsBasicUTF7Decoder::DecodeDirect(
+                             const char * aSrc,
+                             int32_t * aSrcLength,
+                             char16_t * aDest,
+                             int32_t * aDestLength)
+{
+  const char * srcEnd = aSrc + *aSrcLength;
+  const char * src = aSrc;
+  char16_t * destEnd = aDest + *aDestLength;
+  char16_t * dest = aDest;
+  nsresult res = NS_OK;
+  char ch;
+
+  while (src < srcEnd) {
+    ch = *src;
+
+    // stop when we meet other chars or end of direct encoded seq.
+    // if (!(DirectEncodable(ch)) || (ch == mEscChar)) {
+    // but we are decoding; so we should be lax; pass everything until escchar
+    if (ch == mEscChar) {
+      res = NS_ERROR_UDEC_ILLEGALINPUT;
+      break;
+    }
+
+    if (dest >= destEnd) {
+      res = NS_OK_UDEC_MOREOUTPUT;
+      break;
+    } else {
+      *dest++ = ch;
+      src++;
+    }
+  }
+
+  *aSrcLength = src - aSrc;
+  *aDestLength = dest - aDest;
+  return res;
+}
+
+nsresult nsBasicUTF7Decoder::DecodeBase64(
+                             const char * aSrc,
+                             int32_t * aSrcLength,
+                             char16_t * aDest,
+                             int32_t * aDestLength)
+{
+  const char * srcEnd = aSrc + *aSrcLength;
+  const char * src = aSrc;
+  char16_t * destEnd = aDest + *aDestLength;
+  char16_t * dest = aDest;
+  nsresult res = NS_OK;
+  char ch;
+  uint32_t value;
+
+  while (src < srcEnd) {
+    ch = *src;
+
+    // stop when we meet other chars or end of direct encoded seq.
+    value = CharToValue(ch);
+    if (value > 0xff) {
+      res = NS_ERROR_UDEC_ILLEGALINPUT;
+      break;
+    }
+
+    switch (mEncStep) {
+      case 0:
+        mEncBits = value << 10;
+        break;
+      case 1:
+        mEncBits += value << 4;
+        break;
+      case 2:
+        if (dest >= destEnd) {
+          res = NS_OK_UDEC_MOREOUTPUT;
+          break;
+        }
+        mEncBits += value >> 2;
+        *(dest++) = (char16_t) mEncBits;
+        mEncBits = (value & 0x03) << 14;
+        break;
+      case 3:
+        mEncBits += value << 8;
+        break;
+      case 4:
+        mEncBits += value << 2;
+        break;
+      case 5:
+        if (dest >= destEnd) {
+          res = NS_OK_UDEC_MOREOUTPUT;
+          break;
+        }
+        mEncBits += value >> 4;
+        *(dest++) = (char16_t) mEncBits;
+        mEncBits = (value & 0x0f) << 12;
+        break;
+      case 6:
+        mEncBits += value << 6;
+        break;
+      case 7:
+        if (dest >= destEnd) {
+          res = NS_OK_UDEC_MOREOUTPUT;
+          break;
+        }
+        mEncBits += value;
+        *(dest++) = (char16_t) mEncBits;
+        mEncBits = 0;
+        break;
+    }
+
+    if (res != NS_OK) break;
+
+    src++;
+    (++mEncStep)%=8;
+  }
+
+  *aSrcLength = src - aSrc;
+  *aDestLength = dest - aDest;
+  return res;
+}
+
+uint32_t nsBasicUTF7Decoder::CharToValue(char aChar) {
+  if ((aChar>='A')&&(aChar<='Z'))
+    return (uint8_t)(aChar-'A');
+  else if ((aChar>='a')&&(aChar<='z'))
+    return (uint8_t)(26+aChar-'a');
+  else if ((aChar>='0')&&(aChar<='9'))
+    return (uint8_t)(26+26+aChar-'0');
+  else if (aChar=='+')
+    return (uint8_t)(26+26+10);
+  else if (aChar==mLastChar)
+    return (uint8_t)(26+26+10+1);
+  else
+    return 0xffff;
+}
+
+//----------------------------------------------------------------------
+// Subclassing of nsBufferDecoderSupport class [implementation]
+
+NS_IMETHODIMP nsBasicUTF7Decoder::ConvertNoBuff(const char * aSrc,
+                                                int32_t * aSrcLength,
+                                                char16_t * aDest,
+                                                int32_t * aDestLength)
+{
+  const char * srcEnd = aSrc + *aSrcLength;
+  const char * src = aSrc;
+  char16_t * destEnd = aDest + *aDestLength;
+  char16_t * dest = aDest;
+  int32_t bcr,bcw;
+  nsresult res = NS_OK;
+
+  while (src < srcEnd) {
+
+    // fist, attept to decode in the current mode
+    bcr = srcEnd - src;
+    bcw = destEnd - dest;
+    if (mEncoding == ENC_DIRECT)
+      res = DecodeDirect(src, &bcr, dest, &bcw);
+    else if ((mFreshBase64) && (*src == '-')) {
+      *dest = mEscChar;
+      bcr = 0;
+      bcw = 1;
+      res = NS_ERROR_UDEC_ILLEGALINPUT;
+    } else {
+      mFreshBase64 = false;
+      res = DecodeBase64(src, &bcr, dest, &bcw);
+    }
+    src += bcr;
+    dest += bcw;
+
+    // if an illegal char was encountered, test if it is an escape seq.
+    if (res == NS_ERROR_UDEC_ILLEGALINPUT) {
+      if (mEncoding == ENC_DIRECT) {
+        if (*src == mEscChar) {
+          mEncoding = ENC_BASE64;
+          mFreshBase64 = true;
+          mEncBits = 0;
+          mEncStep = 0;
+          src++;
+          res = NS_OK;
+        } else break;
+      } else {
+        mEncoding = ENC_DIRECT;
+        res = NS_OK;
+        // absorbe end of escape sequence
+        if (*src == '-') src++;
+      }
+    } else if (res != NS_OK) break;
+  }
+
+  *aSrcLength = src - aSrc;
+  *aDestLength = dest - aDest;
+  return res;
+}
+
+NS_IMETHODIMP nsBasicUTF7Decoder::Reset()
+{
+  mEncoding = ENC_DIRECT;
+  mEncBits = 0;
+  mEncStep = 0;
+  return nsBufferDecoderSupport::Reset();
+}
+
+//----------------------------------------------------------------------
+// Class nsUTF7ToUnicode [implementation]
+
+nsUTF7ToUnicode::nsUTF7ToUnicode()
+: nsBasicUTF7Decoder('/', '+')
+{
+}