diff options
Diffstat (limited to 'src/3rdparty/assimp/contrib/rapidjson/include/rapidjson/internal/dtoa.h')
-rw-r--r-- | src/3rdparty/assimp/contrib/rapidjson/include/rapidjson/internal/dtoa.h | 46 |
1 files changed, 37 insertions, 9 deletions
diff --git a/src/3rdparty/assimp/contrib/rapidjson/include/rapidjson/internal/dtoa.h b/src/3rdparty/assimp/contrib/rapidjson/include/rapidjson/internal/dtoa.h index d04ae21cc..bf2e9b2e5 100644 --- a/src/3rdparty/assimp/contrib/rapidjson/include/rapidjson/internal/dtoa.h +++ b/src/3rdparty/assimp/contrib/rapidjson/include/rapidjson/internal/dtoa.h @@ -29,6 +29,7 @@ namespace internal { #ifdef __GNUC__ RAPIDJSON_DIAG_PUSH RAPIDJSON_DIAG_OFF(effc++) +RAPIDJSON_DIAG_OFF(array-bounds) // some gcc versions generate wrong warnings https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59124 #endif inline void GrisuRound(char* buffer, int len, uint64_t delta, uint64_t rest, uint64_t ten_kappa, uint64_t wp_w) { @@ -40,7 +41,7 @@ inline void GrisuRound(char* buffer, int len, uint64_t delta, uint64_t rest, uin } } -inline unsigned CountDecimalDigit32(uint32_t n) { +inline int CountDecimalDigit32(uint32_t n) { // Simple pure C++ implementation was faster than __builtin_clz version in this situation. if (n < 10) return 1; if (n < 100) return 2; @@ -62,7 +63,7 @@ inline void DigitGen(const DiyFp& W, const DiyFp& Mp, uint64_t delta, char* buff const DiyFp wp_w = Mp - W; uint32_t p1 = static_cast<uint32_t>(Mp.f >> -one.e); uint64_t p2 = Mp.f & (one.f - 1); - unsigned kappa = CountDecimalDigit32(p1); // kappa in [0, 9] + int kappa = CountDecimalDigit32(p1); // kappa in [0, 9] *len = 0; while (kappa > 0) { @@ -101,7 +102,8 @@ inline void DigitGen(const DiyFp& W, const DiyFp& Mp, uint64_t delta, char* buff kappa--; if (p2 < delta) { *K += kappa; - GrisuRound(buffer, *len, delta, p2, one.f, wp_w.f * kPow10[-static_cast<int>(kappa)]); + int index = -kappa; + GrisuRound(buffer, *len, delta, p2, one.f, wp_w.f * (index < 9 ? kPow10[index] : 0)); return; } } @@ -145,10 +147,10 @@ inline char* WriteExponent(int K, char* buffer) { return buffer; } -inline char* Prettify(char* buffer, int length, int k) { +inline char* Prettify(char* buffer, int length, int k, int maxDecimalPlaces) { const int kk = length + k; // 10^(kk-1) <= v < 10^kk - if (length <= kk && kk <= 21) { + if (0 <= k && kk <= 21) { // 1234e7 -> 12340000000 for (int i = length; i < kk; i++) buffer[i] = '0'; @@ -160,7 +162,16 @@ inline char* Prettify(char* buffer, int length, int k) { // 1234e-2 -> 12.34 std::memmove(&buffer[kk + 1], &buffer[kk], static_cast<size_t>(length - kk)); buffer[kk] = '.'; - return &buffer[length + 1]; + if (0 > k + maxDecimalPlaces) { + // When maxDecimalPlaces = 2, 1.2345 -> 1.23, 1.102 -> 1.1 + // Remove extra trailing zeros (at least one) after truncation. + for (int i = kk + maxDecimalPlaces; i > kk + 1; i--) + if (buffer[i] != '0') + return &buffer[i + 1]; + return &buffer[kk + 2]; // Reserve one zero + } + else + return &buffer[length + 1]; } else if (-6 < kk && kk <= 0) { // 1234e-6 -> 0.001234 @@ -170,7 +181,23 @@ inline char* Prettify(char* buffer, int length, int k) { buffer[1] = '.'; for (int i = 2; i < offset; i++) buffer[i] = '0'; - return &buffer[length + offset]; + if (length - kk > maxDecimalPlaces) { + // When maxDecimalPlaces = 2, 0.123 -> 0.12, 0.102 -> 0.1 + // Remove extra trailing zeros (at least one) after truncation. + for (int i = maxDecimalPlaces + 1; i > 2; i--) + if (buffer[i] != '0') + return &buffer[i + 1]; + return &buffer[3]; // Reserve one zero + } + else + return &buffer[length + offset]; + } + else if (kk < -maxDecimalPlaces) { + // Truncate to zero + buffer[0] = '0'; + buffer[1] = '.'; + buffer[2] = '0'; + return &buffer[3]; } else if (length == 1) { // 1e30 @@ -186,7 +213,8 @@ inline char* Prettify(char* buffer, int length, int k) { } } -inline char* dtoa(double value, char* buffer) { +inline char* dtoa(double value, char* buffer, int maxDecimalPlaces = 324) { + RAPIDJSON_ASSERT(maxDecimalPlaces >= 1); Double d(value); if (d.IsZero()) { if (d.Sign()) @@ -203,7 +231,7 @@ inline char* dtoa(double value, char* buffer) { } int length, K; Grisu2(value, buffer, &length, &K); - return Prettify(buffer, length, K); + return Prettify(buffer, length, K, maxDecimalPlaces); } } |