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Drop pre-C++11 alternatives (#1593)

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* Assume C++11

We already assume C++11 elsewhere, so all pre-11 `#ifdef` branches are
dead code at this point. Fixes issue #1591 because we can just use
`std::isfinite` etc.

assume C++11 in json_reader.cpp as well

apply clang-format

* valueToString: simplify lookup of special float name
This commit is contained in:
Billy Donahue 2025-01-10 18:17:00 -05:00 committed by GitHub
parent dca8a24cf8
commit 07a8fe6a23
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3 changed files with 9 additions and 83 deletions
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2
AUTHORS
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@ -16,7 +16,7 @@ Baruch Siach <baruch@tkos.co.il>
Ben Boeckel <mathstuf@gmail.com>
Benjamin Knecht <bknecht@logitech.com>
Bernd Kuhls <bernd.kuhls@t-online.de>
Billy Donahue <billydonahue@google.com>
Billy Donahue <billy.donahue@gmail.com>
Braden McDorman <bmcdorman@gmail.com>
Brandon Myers <bmyers1788@gmail.com>
Brendan Drew <brendan.drew@daqri.com>

11
src/lib_json/json_reader.cpp
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@ -23,13 +23,6 @@
#include <utility>
#include <cstdio>
#if __cplusplus >= 201103L
#if !defined(sscanf)
#define sscanf std::sscanf
#endif
#endif //__cplusplus
#if defined(_MSC_VER)
#if !defined(_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES)
@ -53,11 +46,7 @@ static size_t const stackLimit_g =
namespace Json {
#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520)
using CharReaderPtr = std::unique_ptr<CharReader>;
#else
using CharReaderPtr = std::auto_ptr<CharReader>;
#endif
// Implementation of class Features
// ////////////////////////////////

79
src/lib_json/json_writer.cpp
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@ -10,6 +10,8 @@
#include <algorithm>
#include <cassert>
#include <cctype>
#include <cmath>
#include <cstdio>
#include <cstring>
#include <iomanip>
#include <memory>
@ -17,67 +19,6 @@
#include <sstream>
#include <utility>
#if __cplusplus >= 201103L
#include <cmath>
#include <cstdio>
#if !defined(isnan)
#define isnan std::isnan
#endif
#if !defined(isfinite)
#define isfinite std::isfinite
#endif
#else
#include <cmath>
#include <cstdio>
#if defined(_MSC_VER)
#if !defined(isnan)
#include <float.h>
#define isnan _isnan
#endif
#if !defined(isfinite)
#include <float.h>
#define isfinite _finite
#endif
#if !defined(_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES)
#define _CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES 1
#endif //_CRT_SECURE_CPP_OVERLOAD_STANDARD_NAMES
#endif //_MSC_VER
#if defined(__sun) && defined(__SVR4) // Solaris
#if !defined(isfinite)
#include <ieeefp.h>
#define isfinite finite
#endif
#endif
#if defined(__hpux)
#if !defined(isfinite)
#if defined(__ia64) && !defined(finite)
#define isfinite(x) \
((sizeof(x) == sizeof(float) ? _Isfinitef(x) : _IsFinite(x)))
#endif
#endif
#endif
#if !defined(isnan)
// IEEE standard states that NaN values will not compare to themselves
#define isnan(x) ((x) != (x))
#endif
#if !defined(__APPLE__)
#if !defined(isfinite)
#define isfinite finite
#endif
#endif
#endif
#if defined(_MSC_VER)
// Disable warning about strdup being deprecated.
#pragma warning(disable : 4996)
@ -85,11 +26,7 @@
namespace Json {
#if __cplusplus >= 201103L || (defined(_CPPLIB_VER) && _CPPLIB_VER >= 520)
using StreamWriterPtr = std::unique_ptr<StreamWriter>;
#else
using StreamWriterPtr = std::auto_ptr<StreamWriter>;
#endif
String valueToString(LargestInt value) {
UIntToStringBuffer buffer;
@ -129,12 +66,12 @@ String valueToString(double value, bool useSpecialFloats,
// Print into the buffer. We need not request the alternative representation
// that always has a decimal point because JSON doesn't distinguish the
// concepts of reals and integers.
if (!isfinite(value)) {
static const char* const reps[2][3] = {{"NaN", "-Infinity", "Infinity"},
{"null", "-1e+9999", "1e+9999"}};
return reps[useSpecialFloats ? 0 : 1][isnan(value) ? 0
: (value < 0) ? 1
: 2];
if (!std::isfinite(value)) {
if (std::isnan(value))
return useSpecialFloats ? "NaN" : "null";
if (value < 0)
return useSpecialFloats ? "-Infinity" : "-1e+9999";
return useSpecialFloats ? "Infinity" : "1e+9999";
}
String buffer(size_t(36), '\0');