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improve compare_double function

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Alanscut
2019-12-06 18:16:27 +08:00
parent 1f970e7db3
commit c06d8264d0
2 changed files with 3 additions and 3 deletions
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2
cJSON.c
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@@ -483,7 +483,7 @@ static void update_offset(printbuffer * const buffer)
/* securely comparison of floating-point variables */ /* securely comparison of floating-point variables */
static cJSON_bool compare_double(double a, double b) static cJSON_bool compare_double(double a, double b)
{ {
return (fabs(a - b) <= a * CJSON_DOUBLE_PRECIION); return (fabs(a - b) <= CJSON_DOUBLE_PRECISION);
} }
/* Render the number nicely from the given item into a string. */ /* Render the number nicely from the given item into a string. */

4
cJSON.h
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@@ -138,8 +138,8 @@ typedef int cJSON_bool;
#endif #endif
/* Precision of double variables comparison */ /* Precision of double variables comparison */
#ifndef CJSON_DOUBLE_PRECIION #ifndef CJSON_DOUBLE_PRECISION
#define CJSON_DOUBLE_PRECIION .00001 #define CJSON_DOUBLE_PRECISION .0000000000000001
#endif #endif
/* returns the version of cJSON as a string */ /* returns the version of cJSON as a string */