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      1 // Copyright (c) 2012, Google Inc.
      2 // All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions are
      6 // met:
      7 //
      8 //     * Redistributions of source code must retain the above copyright
      9 // notice, this list of conditions and the following disclaimer.
     10 //     * Redistributions in binary form must reproduce the above
     11 // copyright notice, this list of conditions and the following disclaimer
     12 // in the documentation and/or other materials provided with the
     13 // distribution.
     14 //     * Neither the name of Google Inc. nor the names of its
     15 // contributors may be used to endorse or promote products derived from
     16 // this software without specific prior written permission.
     17 //
     18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29 
     30 // Android doesn't provide wcscasecmp(), so provide an alternative here.
     31 //
     32 // Note that this header is not needed when Breakpad is compiled against
     33 // a recent version of Googletest. It shall be considered for removal once
     34 // src/testing/ is updated to an appropriate revision in the future.
     35 
     36 #ifndef GOOGLEBREAKPAD_COMMON_ANDROID_INCLUDE_WCHAR_H
     37 #define GOOGLEBREAKPAD_COMMON_ANDROID_INCLUDE_WCHAR_H
     38 
     39 #include_next <wchar.h>
     40 
     41 #if !defined(__aarch64__) && !defined(__x86_64__) && \
     42     !(defined(__mips__) && _MIPS_SIM == _ABI64)
     43 
     44 // This needs to be in an extern "C" namespace, or Googletest will not
     45 // compile against it.
     46 #ifdef __cplusplus
     47 extern "C" {
     48 #endif  // __cplusplus
     49 
     50 static wchar_t inline wcstolower(wchar_t ch) {
     51   if (ch >= L'a' && ch <= L'A')
     52     ch -= L'a' - L'A';
     53   return ch;
     54 }
     55 
     56 static int inline wcscasecmp(const wchar_t* s1, const wchar_t* s2) {
     57   for (;;) {
     58     wchar_t c1 = wcstolower(*s1);
     59     wchar_t c2 = wcstolower(*s2);
     60     if (c1 < c2)
     61       return -1;
     62     if (c1 > c2)
     63       return 1;
     64     if (c1 == L'0')
     65       return 0;
     66     s1++;
     67     s2++;
     68   }
     69 }
     70 
     71 #ifdef __cplusplus
     72 }  // extern "C"
     73 #endif  // __cplusplus
     74 #endif
     75 
     76 #endif  // GOOGLEBREAKPAD_COMMON_ANDROID_INCLUDE_WCHAR_H
     77