Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

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

1 files changed, 324 insertions, 0 deletions

diff --git a/xpcom/base/nsINIParser.cpp b/xpcom/base/nsINIParser.cpp
new file mode 100644
index 0000000000..c1eec56f10
--- /dev/null
+++ b/xpcom/base/nsINIParser.cpp
@@ -0,0 +1,324 @@
+/* -*- 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/. */
+
+// Moz headers (alphabetical)
+#include "nsCRTGlue.h"
+#include "nsError.h"
+#include "nsIFile.h"
+#include "nsINIParser.h"
+#include "mozilla/ResultExtensions.h"
+#include "mozilla/URLPreloader.h"
+
+using namespace mozilla;
+
+nsresult nsINIParser::Init(nsIFile* aFile) {
+  nsCString result;
+  MOZ_TRY_VAR(result, URLPreloader::ReadFile(aFile));
+
+  return InitFromString(result);
+}
+
+static const char kNL[] = "\r\n";
+static const char kEquals[] = "=";
+static const char kWhitespace[] = " \t";
+static const char kRBracket[] = "]";
+
+nsresult nsINIParser::InitFromString(const nsCString& aStr) {
+  nsCString fileContents;
+  char* buffer;
+
+  if (StringHead(aStr, 3) == "\xEF\xBB\xBF") {
+    // Someone set us up the Utf-8 BOM
+    // This case is easy, since we assume that BOM-less
+    // files are Utf-8 anyway.  Just skip the BOM and process as usual.
+    fileContents.Append(aStr);
+    buffer = fileContents.BeginWriting() + 3;
+  } else {
+    if (StringHead(aStr, 2) == "\xFF\xFE") {
+      // Someone set us up the Utf-16LE BOM
+      nsDependentSubstring str(reinterpret_cast<const char16_t*>(aStr.get()),
+                               aStr.Length() / 2);
+
+      AppendUTF16toUTF8(Substring(str, 1), fileContents);
+    } else {
+      fileContents.Append(aStr);
+    }
+
+    buffer = fileContents.BeginWriting();
+  }
+
+  char* currSection = nullptr;
+
+  // outer loop tokenizes into lines
+  while (char* token = NS_strtok(kNL, &buffer)) {
+    if (token[0] == '#' || token[0] == ';') {  // it's a comment
+      continue;
+    }
+
+    token = (char*)NS_strspnp(kWhitespace, token);
+    if (!*token) {  // empty line
+      continue;
+    }
+
+    if (token[0] == '[') {  // section header!
+      ++token;
+      currSection = token;
+
+      char* rb = NS_strtok(kRBracket, &token);
+      if (!rb || NS_strtok(kWhitespace, &token)) {
+        // there's either an unclosed [Section or a [Section]Moretext!
+        // we could frankly decide that this INI file is malformed right
+        // here and stop, but we won't... keep going, looking for
+        // a well-formed [section] to continue working with
+        currSection = nullptr;
+      }
+
+      continue;
+    }
+
+    if (!currSection) {
+      // If we haven't found a section header (or we found a malformed
+      // section header), don't bother parsing this line.
+      continue;
+    }
+
+    char* key = token;
+    char* e = NS_strtok(kEquals, &token);
+    if (!e || !token) {
+      continue;
+    }
+
+    SetString(currSection, key, token);
+  }
+
+  return NS_OK;
+}
+
+bool nsINIParser::IsValidSection(const char* aSection) {
+  if (aSection[0] == '\0') {
+    return false;
+  }
+
+  const char* found = strpbrk(aSection, "\r\n[]");
+  return found == nullptr;
+}
+
+bool nsINIParser::IsValidKey(const char* aKey) {
+  if (aKey[0] == '\0') {
+    return false;
+  }
+
+  const char* found = strpbrk(aKey, "\r\n=");
+  return found == nullptr;
+}
+
+bool nsINIParser::IsValidValue(const char* aValue) {
+  const char* found = strpbrk(aValue, "\r\n");
+  return found == nullptr;
+}
+
+nsresult nsINIParser::GetString(const char* aSection, const char* aKey,
+                                nsACString& aResult) {
+  if (!IsValidSection(aSection) || !IsValidKey(aKey)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  INIValue* val;
+  mSections.Get(aSection, &val);
+
+  while (val) {
+    if (strcmp(val->key, aKey) == 0) {
+      aResult.Assign(val->value);
+      return NS_OK;
+    }
+
+    val = val->next.get();
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+nsresult nsINIParser::GetString(const char* aSection, const char* aKey,
+                                char* aResult, uint32_t aResultLen) {
+  if (!IsValidSection(aSection) || !IsValidKey(aKey)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  INIValue* val;
+  mSections.Get(aSection, &val);
+
+  while (val) {
+    if (strcmp(val->key, aKey) == 0) {
+      strncpy(aResult, val->value, aResultLen);
+      aResult[aResultLen - 1] = '\0';
+      if (strlen(val->value) >= aResultLen) {
+        return NS_ERROR_LOSS_OF_SIGNIFICANT_DATA;
+      }
+
+      return NS_OK;
+    }
+
+    val = val->next.get();
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+nsresult nsINIParser::GetSections(INISectionCallback aCB, void* aClosure) {
+  for (const auto& key : mSections.Keys()) {
+    if (!aCB(key, aClosure)) {
+      break;
+    }
+  }
+  return NS_OK;
+}
+
+nsresult nsINIParser::GetStrings(const char* aSection, INIStringCallback aCB,
+                                 void* aClosure) {
+  if (!IsValidSection(aSection)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  INIValue* val;
+
+  for (mSections.Get(aSection, &val); val; val = val->next.get()) {
+    if (!aCB(val->key, val->value, aClosure)) {
+      return NS_OK;
+    }
+  }
+
+  return NS_OK;
+}
+
+nsresult nsINIParser::SetString(const char* aSection, const char* aKey,
+                                const char* aValue) {
+  if (!IsValidSection(aSection) || !IsValidKey(aKey) || !IsValidValue(aValue)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  mSections.WithEntryHandle(aSection, [&](auto&& entry) {
+    if (!entry) {
+      entry.Insert(MakeUnique<INIValue>(aKey, aValue));
+      return;
+    }
+
+    INIValue* v = entry->get();
+
+    // Check whether this key has already been specified; overwrite
+    // if so, or append if not.
+    while (v) {
+      if (!strcmp(aKey, v->key)) {
+        v->SetValue(aValue);
+        break;
+      }
+      if (!v->next) {
+        v->next = MakeUnique<INIValue>(aKey, aValue);
+        break;
+      }
+      v = v->next.get();
+    }
+    NS_ASSERTION(v, "v should never be null coming out of this loop");
+  });
+
+  return NS_OK;
+}
+
+nsresult nsINIParser::DeleteString(const char* aSection, const char* aKey) {
+  if (!IsValidSection(aSection) || !IsValidKey(aKey)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  INIValue* val;
+  if (!mSections.Get(aSection, &val)) {
+    return NS_ERROR_FAILURE;
+  }
+
+  // Special case the first result
+  if (strcmp(val->key, aKey) == 0) {
+    if (!val->next) {
+      mSections.Remove(aSection);
+    } else {
+      mSections.InsertOrUpdate(aSection, std::move(val->next));
+      delete val;
+    }
+    return NS_OK;
+  }
+
+  while (val->next) {
+    if (strcmp(val->next->key, aKey) == 0) {
+      val->next = std::move(val->next->next);
+
+      return NS_OK;
+    }
+
+    val = val->next.get();
+  }
+
+  return NS_ERROR_FAILURE;
+}
+
+nsresult nsINIParser::DeleteSection(const char* aSection) {
+  if (!IsValidSection(aSection)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  if (!mSections.Remove(aSection)) {
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+nsresult nsINIParser::RenameSection(const char* aSection,
+                                    const char* aNewName) {
+  if (!IsValidSection(aSection) || !IsValidSection(aNewName)) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  if (mSections.Contains(aNewName)) {
+    return NS_ERROR_ILLEGAL_VALUE;
+  }
+
+  mozilla::UniquePtr<INIValue> val;
+  if (mSections.Remove(aSection, &val)) {
+    mSections.InsertOrUpdate(aNewName, std::move(val));
+  } else {
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+nsresult nsINIParser::WriteToFile(nsIFile* aFile) {
+  nsCString buffer;
+
+  WriteToString(buffer);
+
+  FILE* writeFile;
+  nsresult rv = aFile->OpenANSIFileDesc("w", &writeFile);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  unsigned int length = buffer.Length();
+
+  if (fwrite(buffer.get(), sizeof(char), length, writeFile) != length) {
+    fclose(writeFile);
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  fclose(writeFile);
+  return NS_OK;
+}
+
+void nsINIParser::WriteToString(nsACString& aOutput) {
+  for (const auto& entry : mSections) {
+    aOutput.AppendPrintf("[%s]\n", entry.GetKey());
+    INIValue* val = entry.GetWeak();
+    while (val) {
+      aOutput.AppendPrintf("%s=%s\n", val->key, val->value);
+      val = val->next.get();
+    }
+    aOutput.AppendLiteral("\n");
+  }
+}