1 files changed, 119 insertions, 0 deletions
diff --git a/xpcom/ds/nsCRT.h b/xpcom/ds/nsCRT.h
new file mode 100644
index 0000000000..14b46c5059
--- /dev/null
+++ b/xpcom/ds/nsCRT.h
@@ -0,0 +1,119 @@
+/* -*- 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 nsCRT_h___
+#define nsCRT_h___
+
+#include <stdlib.h>
+#include <ctype.h>
+#include "plstr.h"
+#include "nscore.h"
+#include "nsCRTGlue.h"
+
+#if defined(XP_WIN)
+#  define NS_LINEBREAK "\015\012"
+#  define NS_ULINEBREAK u"\015\012"
+#  define NS_LINEBREAK_LEN 2
+#else
+#  ifdef XP_UNIX
+#    define NS_LINEBREAK "\012"
+#    define NS_ULINEBREAK u"\012"
+#    define NS_LINEBREAK_LEN 1
+#  endif /* XP_UNIX */
+#endif   /* XP_WIN */
+
+/// This is a wrapper class around all the C runtime functions.
+
+class nsCRT {
+ public:
+  enum {
+    LF = '\n' /* Line Feed */,
+    VTAB = '\v' /* Vertical Tab */,
+    CR = '\r' /* Carriage Return */
+  };
+
+  /// String comparison.
+  static int32_t strcmp(const char* aStr1, const char* aStr2) {
+    return int32_t(PL_strcmp(aStr1, aStr2));
+  }
+
+  /// Case-insensitive string comparison.
+  static int32_t strcasecmp(const char* aStr1, const char* aStr2) {
+    /* Some functions like `PL_strcasecmp` are reimplementations
+     * of the their native POSIX counterparts, which breaks libFuzzer.
+     * For this purpose, we use the natives instead when fuzzing.
+     */
+#if defined(LIBFUZZER) && defined(LINUX)
+    return int32_t(::strcasecmp(aStr1, aStr2));
+#else
+    return int32_t(PL_strcasecmp(aStr1, aStr2));
+#endif
+  }
+
+  /// Case-insensitive string comparison with length
+  static int32_t strncasecmp(const char* aStr1, const char* aStr2,
+                             uint32_t aMaxLen) {
+#if defined(LIBFUZZER) && defined(LINUX)
+    int32_t result = int32_t(::strncasecmp(aStr1, aStr2, aMaxLen));
+#else
+    int32_t result = int32_t(PL_strncasecmp(aStr1, aStr2, aMaxLen));
+#endif
+    // Egads. PL_strncasecmp is returning *very* negative numbers.
+    // Some folks expect -1,0,1, so let's temper its enthusiasm.
+    if (result < 0) {
+      result = -1;
+    }
+    return result;
+  }
+
+  /// Case-insensitive substring search.
+  static char* strcasestr(const char* aStr1, const char* aStr2) {
+#if defined(LIBFUZZER) && defined(LINUX)
+    return const_cast<char*>(::strcasestr(aStr1, aStr2));
+#else
+    return PL_strcasestr(aStr1, aStr2);
+#endif
+  }
+
+  /**
+
+    How to use this fancy (thread-safe) version of strtok:
+
+    void main(void) {
+      printf("%s\n\nTokens:\n", string);
+      // Establish string and get the first token:
+      char* newStr;
+      token = nsCRT::strtok(string, seps, &newStr);
+      while (token != nullptr) {
+        // While there are tokens in "string"
+        printf(" %s\n", token);
+        // Get next token:
+        token = nsCRT::strtok(newStr, seps, &newStr);
+      }
+    }
+    * WARNING - STRTOK WHACKS str THE FIRST TIME IT IS CALLED *
+    * MAKE A COPY OF str IF YOU NEED TO USE IT AFTER strtok() *
+  */
+  static char* strtok(char* aStr, const char* aDelims, char** aNewStr);
+
+  /// Like strcmp except for ucs2 strings
+  static int32_t strcmp(const char16_t* aStr1, const char16_t* aStr2);
+
+  // String to longlong
+  static int64_t atoll(const char* aStr);
+
+  static char ToUpper(char aChar) { return NS_ToUpper(aChar); }
+  static char ToLower(char aChar) { return NS_ToLower(aChar); }
+
+  static bool IsAsciiSpace(char16_t aChar) {
+    return NS_IsAsciiWhitespace(aChar);
+  }
+};
+
+inline bool NS_IS_SPACE(char16_t aChar) {
+  return ((int(aChar) & 0x7f) == int(aChar)) && isspace(int(aChar));
+}
+
+#endif /* nsCRT_h___ */