double-conversion-strtod.h (3549B)
1 // © 2018 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html 3 // 4 // From the double-conversion library. Original license: 5 // 6 // Copyright 2010 the V8 project authors. All rights reserved. 7 // Redistribution and use in source and binary forms, with or without 8 // modification, are permitted provided that the following conditions are 9 // met: 10 // 11 // * Redistributions of source code must retain the above copyright 12 // notice, this list of conditions and the following disclaimer. 13 // * Redistributions in binary form must reproduce the above 14 // copyright notice, this list of conditions and the following 15 // disclaimer in the documentation and/or other materials provided 16 // with the distribution. 17 // * Neither the name of Google Inc. nor the names of its 18 // contributors may be used to endorse or promote products derived 19 // from this software without specific prior written permission. 20 // 21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 33 // ICU PATCH: ifdef around UCONFIG_NO_FORMATTING 34 #include "unicode/utypes.h" 35 #if !UCONFIG_NO_FORMATTING 36 37 #ifndef DOUBLE_CONVERSION_STRTOD_H_ 38 #define DOUBLE_CONVERSION_STRTOD_H_ 39 40 // ICU PATCH: Customize header file paths for ICU. 41 42 #include "double-conversion-utils.h" 43 44 // ICU PATCH: Wrap in ICU namespace 45 U_NAMESPACE_BEGIN 46 47 namespace double_conversion { 48 49 // The buffer must only contain digits in the range [0-9]. It must not 50 // contain a dot or a sign. It must not start with '0', and must not be empty. 51 double Strtod(Vector<const char> buffer, int exponent); 52 53 // The buffer must only contain digits in the range [0-9]. It must not 54 // contain a dot or a sign. It must not start with '0', and must not be empty. 55 float Strtof(Vector<const char> buffer, int exponent); 56 57 // Same as Strtod, but assumes that 'trimmed' is already trimmed, as if run 58 // through TrimAndCut. That is, 'trimmed' must have no leading or trailing 59 // zeros, must not be a lone zero, and must not have 'too many' digits. 60 double StrtodTrimmed(Vector<const char> trimmed, int exponent); 61 62 // Same as Strtof, but assumes that 'trimmed' is already trimmed, as if run 63 // through TrimAndCut. That is, 'trimmed' must have no leading or trailing 64 // zeros, must not be a lone zero, and must not have 'too many' digits. 65 float StrtofTrimmed(Vector<const char> trimmed, int exponent); 66 67 inline Vector<const char> TrimTrailingZeros(Vector<const char> buffer) { 68 for (int i = buffer.length() - 1; i >= 0; --i) { 69 if (buffer[i] != '0') { 70 return buffer.SubVector(0, i + 1); 71 } 72 } 73 return Vector<const char>(buffer.start(), 0); 74 } 75 76 } // namespace double_conversion 77 78 // ICU PATCH: Close ICU namespace 79 U_NAMESPACE_END 80 81 #endif // DOUBLE_CONVERSION_STRTOD_H_ 82 #endif // ICU PATCH: close #if !UCONFIG_NO_FORMATTING