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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/string_util.h" | 5 #include "base/string_util.h" |
6 | 6 |
7 #include "build/build_config.h" | 7 #include "build/build_config.h" |
8 | 8 |
9 #include <ctype.h> | 9 #include <ctype.h> |
10 #include <errno.h> | 10 #include <errno.h> |
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908 template <class StringType> | 908 template <class StringType> |
909 static void StringAppendVT(StringType* dst, | 909 static void StringAppendVT(StringType* dst, |
910 const typename StringType::value_type* format, | 910 const typename StringType::value_type* format, |
911 va_list ap) { | 911 va_list ap) { |
912 // First try with a small fixed size buffer. | 912 // First try with a small fixed size buffer. |
913 // This buffer size should be kept in sync with StringUtilTest.GrowBoundary | 913 // This buffer size should be kept in sync with StringUtilTest.GrowBoundary |
914 // and StringUtilTest.StringPrintfBounds. | 914 // and StringUtilTest.StringPrintfBounds. |
915 typename StringType::value_type stack_buf[1024]; | 915 typename StringType::value_type stack_buf[1024]; |
916 | 916 |
917 va_list backup_ap; | 917 va_list backup_ap; |
918 base::va_copy(backup_ap, ap); | 918 GG_VA_COPY(backup_ap, ap); |
919 | 919 |
920 #if !defined(OS_WIN) | 920 #if !defined(OS_WIN) |
921 errno = 0; | 921 errno = 0; |
922 #endif | 922 #endif |
923 int result = vsnprintfT(stack_buf, arraysize(stack_buf), format, backup_ap); | 923 int result = vsnprintfT(stack_buf, arraysize(stack_buf), format, backup_ap); |
924 va_end(backup_ap); | 924 va_end(backup_ap); |
925 | 925 |
926 if (result >= 0 && result < static_cast<int>(arraysize(stack_buf))) { | 926 if (result >= 0 && result < static_cast<int>(arraysize(stack_buf))) { |
927 // It fit. | 927 // It fit. |
928 dst->append(stack_buf, result); | 928 dst->append(stack_buf, result); |
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955 // That should be plenty, don't try anything larger. This protects | 955 // That should be plenty, don't try anything larger. This protects |
956 // against huge allocations when using vsnprintfT implementations that | 956 // against huge allocations when using vsnprintfT implementations that |
957 // return -1 for reasons other than overflow without setting errno. | 957 // return -1 for reasons other than overflow without setting errno. |
958 DLOG(WARNING) << "Unable to printf the requested string due to size."; | 958 DLOG(WARNING) << "Unable to printf the requested string due to size."; |
959 return; | 959 return; |
960 } | 960 } |
961 | 961 |
962 std::vector<typename StringType::value_type> mem_buf(mem_length); | 962 std::vector<typename StringType::value_type> mem_buf(mem_length); |
963 | 963 |
964 // Restore the va_list before we use it again. | 964 // Restore the va_list before we use it again. |
965 base::va_copy(backup_ap, ap); | 965 GG_VA_COPY(backup_ap, ap); |
966 | 966 |
967 result = vsnprintfT(&mem_buf[0], mem_length, format, ap); | 967 result = vsnprintfT(&mem_buf[0], mem_length, format, ap); |
968 va_end(backup_ap); | 968 va_end(backup_ap); |
969 | 969 |
970 if ((result >= 0) && (result < mem_length)) { | 970 if ((result >= 0) && (result < mem_length)) { |
971 // It fit. | 971 // It fit. |
972 dst->append(&mem_buf[0], result); | 972 dst->append(&mem_buf[0], result); |
973 return; | 973 return; |
974 } | 974 } |
975 } | 975 } |
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1649 // Each input byte creates two output hex characters. | 1649 // Each input byte creates two output hex characters. |
1650 std::string ret(size * 2, '\0'); | 1650 std::string ret(size * 2, '\0'); |
1651 | 1651 |
1652 for (size_t i = 0; i < size; ++i) { | 1652 for (size_t i = 0; i < size; ++i) { |
1653 char b = reinterpret_cast<const char*>(bytes)[i]; | 1653 char b = reinterpret_cast<const char*>(bytes)[i]; |
1654 ret[(i * 2)] = kHexChars[(b >> 4) & 0xf]; | 1654 ret[(i * 2)] = kHexChars[(b >> 4) & 0xf]; |
1655 ret[(i * 2) + 1] = kHexChars[b & 0xf]; | 1655 ret[(i * 2) + 1] = kHexChars[b & 0xf]; |
1656 } | 1656 } |
1657 return ret; | 1657 return ret; |
1658 } | 1658 } |
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