Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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70 lines
2.8 KiB
70 lines
2.8 KiB
// Protocol Buffers - Google's data interchange format |
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// Copyright 2023 Google LLC. All rights reserved. |
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// https://developers.google.com/protocol-buffers/ |
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// |
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// Redistribution and use in source and binary forms, with or without |
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// modification, are permitted provided that the following conditions are |
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// met: |
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// |
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// * Redistributions of source code must retain the above copyright |
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// notice, this list of conditions and the following disclaimer. |
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// * Redistributions in binary form must reproduce the above |
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// copyright notice, this list of conditions and the following disclaimer |
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// in the documentation and/or other materials provided with the |
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// distribution. |
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// * Neither the name of Google LLC nor the names of its |
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// contributors may be used to endorse or promote products derived from |
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// this software without specific prior written permission. |
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// |
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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#include "upb/lex/round_trip.h" |
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#include <float.h> |
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#include <stdlib.h> |
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// Must be last. |
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#include "upb/port/def.inc" |
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/* Miscellaneous utilities ****************************************************/ |
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static void upb_FixLocale(char* p) { |
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/* printf() is dependent on locales; sadly there is no easy and portable way |
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* to avoid this. This little post-processing step will translate 1,2 -> 1.2 |
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* since JSON needs the latter. Arguably a hack, but it is simple and the |
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* alternatives are far more complicated, platform-dependent, and/or larger |
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* in code size. */ |
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for (; *p; p++) { |
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if (*p == ',') *p = '.'; |
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} |
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} |
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void _upb_EncodeRoundTripDouble(double val, char* buf, size_t size) { |
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assert(size >= kUpb_RoundTripBufferSize); |
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snprintf(buf, size, "%.*g", DBL_DIG, val); |
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if (strtod(buf, NULL) != val) { |
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snprintf(buf, size, "%.*g", DBL_DIG + 2, val); |
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assert(strtod(buf, NULL) == val); |
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} |
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upb_FixLocale(buf); |
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} |
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void _upb_EncodeRoundTripFloat(float val, char* buf, size_t size) { |
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assert(size >= kUpb_RoundTripBufferSize); |
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snprintf(buf, size, "%.*g", FLT_DIG, val); |
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if (strtof(buf, NULL) != val) { |
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snprintf(buf, size, "%.*g", FLT_DIG + 3, val); |
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assert(strtof(buf, NULL) == val); |
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} |
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upb_FixLocale(buf); |
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}
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