Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
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68 lines
2.8 KiB
68 lines
2.8 KiB
/* |
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* Copyright (c) 2009-2021, Google LLC |
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* All rights reserved. |
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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 met: |
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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 copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* * Neither the name of Google LLC nor the |
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* names of its contributors may be used to endorse or promote products |
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* derived from 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 "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT, |
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY 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 OF THIS |
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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#include <float.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include "upb/wire/encode_internal.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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