Protocol Buffers - Google's data interchange format (grpc依赖)
https://developers.google.com/protocol-buffers/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
76 lines
2.9 KiB
76 lines
2.9 KiB
/* |
|
* Copyright (c) 2009-2021, Google LLC |
|
* All rights reserved. |
|
* |
|
* Redistribution and use in source and binary forms, with or without |
|
* modification, are permitted provided that the following conditions are met: |
|
* * Redistributions of source code must retain the above copyright |
|
* notice, this list of conditions and the following disclaimer. |
|
* * Redistributions in binary form must reproduce the above copyright |
|
* notice, this list of conditions and the following disclaimer in the |
|
* documentation and/or other materials provided with the distribution. |
|
* * Neither the name of Google LLC nor the |
|
* names of its contributors may be used to endorse or promote products |
|
* derived from this software without specific prior written permission. |
|
* |
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
|
* ARE DISCLAIMED. IN NO EVENT SHALL Google LLC BE LIABLE FOR ANY DIRECT, |
|
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
|
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
|
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
|
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
*/ |
|
|
|
#include "upb/internal/upb.h" |
|
|
|
#include <errno.h> |
|
#include <float.h> |
|
#include <stdarg.h> |
|
#include <stddef.h> |
|
#include <stdint.h> |
|
#include <stdio.h> |
|
#include <stdlib.h> |
|
#include <string.h> |
|
|
|
#include "upb/arena.h" |
|
#include "upb/status.h" |
|
|
|
// Must be last. |
|
#include "upb/port_def.inc" |
|
|
|
/* Miscellaneous utilities ****************************************************/ |
|
|
|
static void upb_FixLocale(char* p) { |
|
/* printf() is dependent on locales; sadly there is no easy and portable way |
|
* to avoid this. This little post-processing step will translate 1,2 -> 1.2 |
|
* since JSON needs the latter. Arguably a hack, but it is simple and the |
|
* alternatives are far more complicated, platform-dependent, and/or larger |
|
* in code size. */ |
|
for (; *p; p++) { |
|
if (*p == ',') *p = '.'; |
|
} |
|
} |
|
|
|
void _upb_EncodeRoundTripDouble(double val, char* buf, size_t size) { |
|
assert(size >= kUpb_RoundTripBufferSize); |
|
snprintf(buf, size, "%.*g", DBL_DIG, val); |
|
if (strtod(buf, NULL) != val) { |
|
snprintf(buf, size, "%.*g", DBL_DIG + 2, val); |
|
assert(strtod(buf, NULL) == val); |
|
} |
|
upb_FixLocale(buf); |
|
} |
|
|
|
void _upb_EncodeRoundTripFloat(float val, char* buf, size_t size) { |
|
assert(size >= kUpb_RoundTripBufferSize); |
|
snprintf(buf, size, "%.*g", FLT_DIG, val); |
|
if (strtof(buf, NULL) != val) { |
|
snprintf(buf, size, "%.*g", FLT_DIG + 3, val); |
|
assert(strtof(buf, NULL) == val); |
|
} |
|
upb_FixLocale(buf); |
|
}
|
|
|