Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 141 insertions, 0 deletions

diff --git a/xpcom/io/nsLinebreakConverter.h b/xpcom/io/nsLinebreakConverter.h
new file mode 100644
index 0000000000..2ecde3beec
--- /dev/null
+++ b/xpcom/io/nsLinebreakConverter.h
@@ -0,0 +1,141 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef nsLinebreakConverter_h_
+#define nsLinebreakConverter_h_
+
+#include "nscore.h"
+#include "nsString.h"
+
+// utility class for converting between different line breaks.
+
+class nsLinebreakConverter {
+ public:
+  // Note: enum must match char* array in GetLinebreakString
+  typedef enum {
+    eLinebreakAny,  // any kind of linebreak (i.e. "don't care" source)
+
+    eLinebreakPlatform,  // platform linebreak
+    eLinebreakContent,   // Content model linebreak (LF)
+    eLinebreakNet,       // Form submission linebreak (CRLF)
+
+    eLinebreakMac,      // CR
+    eLinebreakUnix,     // LF
+    eLinebreakWindows,  // CRLF
+
+    eLinebreakSpace  // space characters. Only valid as destination type
+
+  } ELinebreakType;
+
+  enum { kIgnoreLen = -1 };
+
+  /* ConvertLineBreaks
+   * Convert line breaks in the supplied string, allocating and returning
+   * a new buffer. Returns nullptr on failure.
+   * @param aSrc: the source string. if aSrcLen == kIgnoreLen this string is
+   *              assumed to be null terminated, otherwise it must be at least
+   *              aSrcLen long.
+   * @param aSrcBreaks: the line breaks in the source. If unknown, pass
+   *              eLinebreakAny.  If known, pass the known value, as this may
+   *              be more efficient.
+   * @param aDestBreaks: the line breaks you want in the output.
+   * @param aSrcLen: length of the source. If -1, the source is assumed to be a
+   *              null-terminated string.
+   * @param aOutLen: used to return character length of returned buffer, if not
+   *              null.
+   */
+  static char* ConvertLineBreaks(const char* aSrc, ELinebreakType aSrcBreaks,
+                                 ELinebreakType aDestBreaks,
+                                 int32_t aSrcLen = kIgnoreLen,
+                                 int32_t* aOutLen = nullptr);
+
+  /* ConvertUnicharLineBreaks
+   * Convert line breaks in the supplied string, allocating and returning
+   * a new buffer. Returns nullptr on failure.
+   * @param aSrc: the source string. if aSrcLen == kIgnoreLen this string is
+   *              assumed to be null terminated, otherwise it must be at least
+   *              aSrcLen long.
+   * @param aSrcBreaks: the line breaks in the source. If unknown, pass
+   *              eLinebreakAny.  If known, pass the known value, as this may
+   *              be more efficient.
+   * @param aDestBreaks: the line breaks you want in the output.
+   * @param aSrcLen: length of the source, in characters. If -1, the source is
+   *              assumed to be a null-terminated string.
+   * @param aOutLen: used to return character length of returned buffer, if not
+   *              null.
+   */
+  static char16_t* ConvertUnicharLineBreaks(const char16_t* aSrc,
+                                            ELinebreakType aSrcBreaks,
+                                            ELinebreakType aDestBreaks,
+                                            int32_t aSrcLen = kIgnoreLen,
+                                            int32_t* aOutLen = nullptr);
+
+  /* ConvertStringLineBreaks
+   * Convert line breaks in the supplied string, changing the string buffer
+   * (i.e. in-place conversion)
+   * @param ioString: the string to be converted.
+   * @param aSrcBreaks: the line breaks in the source. If unknown, pass
+   *              eLinebreakAny.  If known, pass the known value, as this may
+   *              be more efficient.
+   * @param aDestBreaks: the line breaks you want in the output.
+   * @param aSrcLen: length of the source, in characters. If -1, the source is
+   *              assumed to be a null-terminated string.
+   */
+  static nsresult ConvertStringLineBreaks(nsString& aIoString,
+                                          ELinebreakType aSrcBreaks,
+                                          ELinebreakType aDestBreaks);
+
+  /* ConvertLineBreaksInSitu
+   * Convert line breaks in place if possible. NOTE: THIS MAY REALLOCATE THE
+   * BUFFER, BUT IT WON'T FREE THE OLD BUFFER (because it doesn't know how). So
+   * be prepared to keep a copy of the old pointer, and free it if this passes
+   * back a new pointer.  ALSO NOTE: DON'T PASS A STATIC STRING POINTER TO THIS
+   * FUNCTION.
+   *
+   * @param ioBuffer: the source buffer. if aSrcLen == kIgnoreLen this string
+   *              is assumed to be null terminated, otherwise it must be at
+   *              least aSrcLen long.
+   * @param aSrcBreaks: the line breaks in the source. If unknown, pass
+   *              eLinebreakAny.  If known, pass the known value, as this may
+   *              be more efficient.
+   * @param aDestBreaks: the line breaks you want in the output.
+   * @param aSrcLen: length of the source. If -1, the source is assumed to be a
+   *              null-terminated string.
+   * @param aOutLen: used to return character length of returned buffer, if not
+   *              null.
+   */
+  static nsresult ConvertLineBreaksInSitu(char** aIoBuffer,
+                                          ELinebreakType aSrcBreaks,
+                                          ELinebreakType aDestBreaks,
+                                          int32_t aSrcLen = kIgnoreLen,
+                                          int32_t* aOutLen = nullptr);
+
+  /* ConvertUnicharLineBreaksInSitu
+   * Convert line breaks in place if possible. NOTE: THIS MAY REALLOCATE THE
+   * BUFFER, BUT IT WON'T FREE THE OLD BUFFER (because it doesn't know how). So
+   * be prepared to keep a copy of the old pointer, and free it if this passes
+   * back a new pointer.
+   *
+   * @param ioBuffer: the source buffer. if aSrcLen == kIgnoreLen this string
+   *              is assumed to be null terminated, otherwise it must be at
+   *              least aSrcLen long.
+   * @param aSrcBreaks: the line breaks in the source. If unknown, pass
+   *              eLinebreakAny.  If known, pass the known value, as this may
+   *              be more efficient.
+   * @param aDestBreaks: the line breaks you want in the output.
+   * @param aSrcLen: length of the source in characters. If -1, the source is
+   *              assumed to be a null-terminated string.
+   * @param aOutLen: used to return character length of returned buffer, if not
+   *              null.
+   */
+  static nsresult ConvertUnicharLineBreaksInSitu(char16_t** aIoBuffer,
+                                                 ELinebreakType aSrcBreaks,
+                                                 ELinebreakType aDestBreaks,
+                                                 int32_t aSrcLen = kIgnoreLen,
+                                                 int32_t* aOutLen = nullptr);
+};
+
+#endif  // nsLinebreakConverter_h_