Squashed 'third_party/flatbuffers/' content from commit acc9990ab
Change-Id: I48550d40d78fea996ebe74e9723a5d1f910de491
git-subtree-dir: third_party/flatbuffers
git-subtree-split: acc9990abd2206491480291b0f85f925110102ea
diff --git a/include/flatbuffers/util.h b/include/flatbuffers/util.h
new file mode 100644
index 0000000..072fe9e
--- /dev/null
+++ b/include/flatbuffers/util.h
@@ -0,0 +1,657 @@
+/*
+ * Copyright 2014 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef FLATBUFFERS_UTIL_H_
+#define FLATBUFFERS_UTIL_H_
+
+#include "flatbuffers/base.h"
+
+#include <errno.h>
+
+#ifndef FLATBUFFERS_PREFER_PRINTF
+# include <sstream>
+#else // FLATBUFFERS_PREFER_PRINTF
+# include <float.h>
+# include <stdio.h>
+#endif // FLATBUFFERS_PREFER_PRINTF
+
+#include <iomanip>
+#include <string>
+
+namespace flatbuffers {
+
+// @locale-independent functions for ASCII characters set.
+
+// Fast checking that character lies in closed range: [a <= x <= b]
+// using one compare (conditional branch) operator.
+inline bool check_ascii_range(char x, char a, char b) {
+ FLATBUFFERS_ASSERT(a <= b);
+ // (Hacker's Delight): `a <= x <= b` <=> `(x-a) <={u} (b-a)`.
+ // The x, a, b will be promoted to int and subtracted without overflow.
+ return static_cast<unsigned int>(x - a) <= static_cast<unsigned int>(b - a);
+}
+
+// Case-insensitive isalpha
+inline bool is_alpha(char c) {
+ // ASCII only: alpha to upper case => reset bit 0x20 (~0x20 = 0xDF).
+ return check_ascii_range(c & 0xDF, 'a' & 0xDF, 'z' & 0xDF);
+}
+
+// Check (case-insensitive) that `c` is equal to alpha.
+inline bool is_alpha_char(char c, char alpha) {
+ FLATBUFFERS_ASSERT(is_alpha(alpha));
+ // ASCII only: alpha to upper case => reset bit 0x20 (~0x20 = 0xDF).
+ return ((c & 0xDF) == (alpha & 0xDF));
+}
+
+// https://en.cppreference.com/w/cpp/string/byte/isxdigit
+// isdigit and isxdigit are the only standard narrow character classification
+// functions that are not affected by the currently installed C locale. although
+// some implementations (e.g. Microsoft in 1252 codepage) may classify
+// additional single-byte characters as digits.
+inline bool is_digit(char c) { return check_ascii_range(c, '0', '9'); }
+
+inline bool is_xdigit(char c) {
+ // Replace by look-up table.
+ return is_digit(c) || check_ascii_range(c & 0xDF, 'a' & 0xDF, 'f' & 0xDF);
+}
+
+// Case-insensitive isalnum
+inline bool is_alnum(char c) { return is_alpha(c) || is_digit(c); }
+
+// @end-locale-independent functions for ASCII character set
+
+#ifdef FLATBUFFERS_PREFER_PRINTF
+template<typename T> size_t IntToDigitCount(T t) {
+ size_t digit_count = 0;
+ // Count the sign for negative numbers
+ if (t < 0) digit_count++;
+ // Count a single 0 left of the dot for fractional numbers
+ if (-1 < t && t < 1) digit_count++;
+ // Count digits until fractional part
+ T eps = std::numeric_limits<float>::epsilon();
+ while (t <= (-1 + eps) || (1 - eps) <= t) {
+ t /= 10;
+ digit_count++;
+ }
+ return digit_count;
+}
+
+template<typename T> size_t NumToStringWidth(T t, int precision = 0) {
+ size_t string_width = IntToDigitCount(t);
+ // Count the dot for floating point numbers
+ if (precision) string_width += (precision + 1);
+ return string_width;
+}
+
+template<typename T>
+std::string NumToStringImplWrapper(T t, const char *fmt, int precision = 0) {
+ size_t string_width = NumToStringWidth(t, precision);
+ std::string s(string_width, 0x00);
+ // Allow snprintf to use std::string trailing null to detect buffer overflow
+ snprintf(const_cast<char *>(s.data()), (s.size() + 1), fmt, string_width, t);
+ return s;
+}
+#endif // FLATBUFFERS_PREFER_PRINTF
+
+// Convert an integer or floating point value to a string.
+// In contrast to std::stringstream, "char" values are
+// converted to a string of digits, and we don't use scientific notation.
+template<typename T> std::string NumToString(T t) {
+ // clang-format off
+
+ #ifndef FLATBUFFERS_PREFER_PRINTF
+ std::stringstream ss;
+ ss << t;
+ return ss.str();
+ #else // FLATBUFFERS_PREFER_PRINTF
+ auto v = static_cast<long long>(t);
+ return NumToStringImplWrapper(v, "%.*lld");
+ #endif // FLATBUFFERS_PREFER_PRINTF
+ // clang-format on
+}
+// Avoid char types used as character data.
+template<> inline std::string NumToString<signed char>(signed char t) {
+ return NumToString(static_cast<int>(t));
+}
+template<> inline std::string NumToString<unsigned char>(unsigned char t) {
+ return NumToString(static_cast<int>(t));
+}
+template<> inline std::string NumToString<char>(char t) {
+ return NumToString(static_cast<int>(t));
+}
+#if defined(FLATBUFFERS_CPP98_STL)
+template<> inline std::string NumToString<long long>(long long t) {
+ char buf[21]; // (log((1 << 63) - 1) / log(10)) + 2
+ snprintf(buf, sizeof(buf), "%lld", t);
+ return std::string(buf);
+}
+
+template<>
+inline std::string NumToString<unsigned long long>(unsigned long long t) {
+ char buf[22]; // (log((1 << 63) - 1) / log(10)) + 1
+ snprintf(buf, sizeof(buf), "%llu", t);
+ return std::string(buf);
+}
+#endif // defined(FLATBUFFERS_CPP98_STL)
+
+// Special versions for floats/doubles.
+template<typename T> std::string FloatToString(T t, int precision) {
+ // clang-format off
+
+ #ifndef FLATBUFFERS_PREFER_PRINTF
+ // to_string() prints different numbers of digits for floats depending on
+ // platform and isn't available on Android, so we use stringstream
+ std::stringstream ss;
+ // Use std::fixed to suppress scientific notation.
+ ss << std::fixed;
+ // Default precision is 6, we want that to be higher for doubles.
+ ss << std::setprecision(precision);
+ ss << t;
+ auto s = ss.str();
+ #else // FLATBUFFERS_PREFER_PRINTF
+ auto v = static_cast<double>(t);
+ auto s = NumToStringImplWrapper(v, "%0.*f", precision);
+ #endif // FLATBUFFERS_PREFER_PRINTF
+ // clang-format on
+ // Sadly, std::fixed turns "1" into "1.00000", so here we undo that.
+ auto p = s.find_last_not_of('0');
+ if (p != std::string::npos) {
+ // Strip trailing zeroes. If it is a whole number, keep one zero.
+ s.resize(p + (s[p] == '.' ? 2 : 1));
+ }
+ return s;
+}
+
+template<> inline std::string NumToString<double>(double t) {
+ return FloatToString(t, 12);
+}
+template<> inline std::string NumToString<float>(float t) {
+ return FloatToString(t, 6);
+}
+
+// Convert an integer value to a hexadecimal string.
+// The returned string length is always xdigits long, prefixed by 0 digits.
+// For example, IntToStringHex(0x23, 8) returns the string "00000023".
+inline std::string IntToStringHex(int i, int xdigits) {
+ FLATBUFFERS_ASSERT(i >= 0);
+ // clang-format off
+
+ #ifndef FLATBUFFERS_PREFER_PRINTF
+ std::stringstream ss;
+ ss << std::setw(xdigits) << std::setfill('0') << std::hex << std::uppercase
+ << i;
+ return ss.str();
+ #else // FLATBUFFERS_PREFER_PRINTF
+ return NumToStringImplWrapper(i, "%.*X", xdigits);
+ #endif // FLATBUFFERS_PREFER_PRINTF
+ // clang-format on
+}
+
+// clang-format off
+// Use locale independent functions {strtod_l, strtof_l, strtoll_l, strtoull_l}.
+#if defined(FLATBUFFERS_LOCALE_INDEPENDENT) && (FLATBUFFERS_LOCALE_INDEPENDENT > 0)
+ class ClassicLocale {
+ #ifdef _MSC_VER
+ typedef _locale_t locale_type;
+ #else
+ typedef locale_t locale_type; // POSIX.1-2008 locale_t type
+ #endif
+ ClassicLocale();
+ ~ClassicLocale();
+ locale_type locale_;
+ static ClassicLocale instance_;
+ public:
+ static locale_type Get() { return instance_.locale_; }
+ };
+
+ #ifdef _MSC_VER
+ #define __strtoull_impl(s, pe, b) _strtoui64_l(s, pe, b, ClassicLocale::Get())
+ #define __strtoll_impl(s, pe, b) _strtoi64_l(s, pe, b, ClassicLocale::Get())
+ #define __strtod_impl(s, pe) _strtod_l(s, pe, ClassicLocale::Get())
+ #define __strtof_impl(s, pe) _strtof_l(s, pe, ClassicLocale::Get())
+ #else
+ #define __strtoull_impl(s, pe, b) strtoull_l(s, pe, b, ClassicLocale::Get())
+ #define __strtoll_impl(s, pe, b) strtoll_l(s, pe, b, ClassicLocale::Get())
+ #define __strtod_impl(s, pe) strtod_l(s, pe, ClassicLocale::Get())
+ #define __strtof_impl(s, pe) strtof_l(s, pe, ClassicLocale::Get())
+ #endif
+#else
+ #define __strtod_impl(s, pe) strtod(s, pe)
+ #define __strtof_impl(s, pe) static_cast<float>(strtod(s, pe))
+ #ifdef _MSC_VER
+ #define __strtoull_impl(s, pe, b) _strtoui64(s, pe, b)
+ #define __strtoll_impl(s, pe, b) _strtoi64(s, pe, b)
+ #else
+ #define __strtoull_impl(s, pe, b) strtoull(s, pe, b)
+ #define __strtoll_impl(s, pe, b) strtoll(s, pe, b)
+ #endif
+#endif
+
+inline void strtoval_impl(int64_t *val, const char *str, char **endptr,
+ int base) {
+ *val = __strtoll_impl(str, endptr, base);
+}
+
+inline void strtoval_impl(uint64_t *val, const char *str, char **endptr,
+ int base) {
+ *val = __strtoull_impl(str, endptr, base);
+}
+
+inline void strtoval_impl(double *val, const char *str, char **endptr) {
+ *val = __strtod_impl(str, endptr);
+}
+
+// UBSAN: double to float is safe if numeric_limits<float>::is_iec559 is true.
+__supress_ubsan__("float-cast-overflow")
+inline void strtoval_impl(float *val, const char *str, char **endptr) {
+ *val = __strtof_impl(str, endptr);
+}
+#undef __strtoull_impl
+#undef __strtoll_impl
+#undef __strtod_impl
+#undef __strtof_impl
+// clang-format on
+
+// Adaptor for strtoull()/strtoll().
+// Flatbuffers accepts numbers with any count of leading zeros (-009 is -9),
+// while strtoll with base=0 interprets first leading zero as octal prefix.
+// In future, it is possible to add prefixed 0b0101.
+// 1) Checks errno code for overflow condition (out of range).
+// 2) If base <= 0, function try to detect base of number by prefix.
+//
+// Return value (like strtoull and strtoll, but reject partial result):
+// - If successful, an integer value corresponding to the str is returned.
+// - If full string conversion can't be performed, 0 is returned.
+// - If the converted value falls out of range of corresponding return type, a
+// range error occurs. In this case value MAX(T)/MIN(T) is returned.
+template<typename T>
+inline bool StringToIntegerImpl(T *val, const char *const str,
+ const int base = 0,
+ const bool check_errno = true) {
+ // T is int64_t or uint64_T
+ FLATBUFFERS_ASSERT(str);
+ if (base <= 0) {
+ auto s = str;
+ while (*s && !is_digit(*s)) s++;
+ if (s[0] == '0' && is_alpha_char(s[1], 'X'))
+ return StringToIntegerImpl(val, str, 16, check_errno);
+ // if a prefix not match, try base=10
+ return StringToIntegerImpl(val, str, 10, check_errno);
+ } else {
+ if (check_errno) errno = 0; // clear thread-local errno
+ auto endptr = str;
+ strtoval_impl(val, str, const_cast<char **>(&endptr), base);
+ if ((*endptr != '\0') || (endptr == str)) {
+ *val = 0; // erase partial result
+ return false; // invalid string
+ }
+ // errno is out-of-range, return MAX/MIN
+ if (check_errno && errno) return false;
+ return true;
+ }
+}
+
+template<typename T>
+inline bool StringToFloatImpl(T *val, const char *const str) {
+ // Type T must be either float or double.
+ FLATBUFFERS_ASSERT(str && val);
+ auto end = str;
+ strtoval_impl(val, str, const_cast<char **>(&end));
+ auto done = (end != str) && (*end == '\0');
+ if (!done) *val = 0; // erase partial result
+ return done;
+}
+
+// Convert a string to an instance of T.
+// Return value (matched with StringToInteger64Impl and strtod):
+// - If successful, a numeric value corresponding to the str is returned.
+// - If full string conversion can't be performed, 0 is returned.
+// - If the converted value falls out of range of corresponding return type, a
+// range error occurs. In this case value MAX(T)/MIN(T) is returned.
+template<typename T> inline bool StringToNumber(const char *s, T *val) {
+ FLATBUFFERS_ASSERT(s && val);
+ int64_t i64;
+ // The errno check isn't needed, will return MAX/MIN on overflow.
+ if (StringToIntegerImpl(&i64, s, 0, false)) {
+ const int64_t max = (flatbuffers::numeric_limits<T>::max)();
+ const int64_t min = flatbuffers::numeric_limits<T>::lowest();
+ if (i64 > max) {
+ *val = static_cast<T>(max);
+ return false;
+ }
+ if (i64 < min) {
+ // For unsigned types return max to distinguish from
+ // "no conversion can be performed" when 0 is returned.
+ *val = static_cast<T>(flatbuffers::is_unsigned<T>::value ? max : min);
+ return false;
+ }
+ *val = static_cast<T>(i64);
+ return true;
+ }
+ *val = 0;
+ return false;
+}
+
+template<> inline bool StringToNumber<int64_t>(const char *str, int64_t *val) {
+ return StringToIntegerImpl(val, str);
+}
+
+template<>
+inline bool StringToNumber<uint64_t>(const char *str, uint64_t *val) {
+ if (!StringToIntegerImpl(val, str)) return false;
+ // The strtoull accepts negative numbers:
+ // If the minus sign was part of the input sequence, the numeric value
+ // calculated from the sequence of digits is negated as if by unary minus
+ // in the result type, which applies unsigned integer wraparound rules.
+ // Fix this behaviour (except -0).
+ if (*val) {
+ auto s = str;
+ while (*s && !is_digit(*s)) s++;
+ s = (s > str) ? (s - 1) : s; // step back to one symbol
+ if (*s == '-') {
+ // For unsigned types return the max to distinguish from
+ // "no conversion can be performed".
+ *val = (flatbuffers::numeric_limits<uint64_t>::max)();
+ return false;
+ }
+ }
+ return true;
+}
+
+template<> inline bool StringToNumber(const char *s, float *val) {
+ return StringToFloatImpl(val, s);
+}
+
+template<> inline bool StringToNumber(const char *s, double *val) {
+ return StringToFloatImpl(val, s);
+}
+
+inline int64_t StringToInt(const char *s, int base = 10) {
+ int64_t val;
+ return StringToIntegerImpl(&val, s, base) ? val : 0;
+}
+
+inline uint64_t StringToUInt(const char *s, int base = 10) {
+ uint64_t val;
+ return StringToIntegerImpl(&val, s, base) ? val : 0;
+}
+
+typedef bool (*LoadFileFunction)(const char *filename, bool binary,
+ std::string *dest);
+typedef bool (*FileExistsFunction)(const char *filename);
+
+LoadFileFunction SetLoadFileFunction(LoadFileFunction load_file_function);
+
+FileExistsFunction SetFileExistsFunction(
+ FileExistsFunction file_exists_function);
+
+// Check if file "name" exists.
+bool FileExists(const char *name);
+
+// Check if "name" exists and it is also a directory.
+bool DirExists(const char *name);
+
+// Load file "name" into "buf" returning true if successful
+// false otherwise. If "binary" is false data is read
+// using ifstream's text mode, otherwise data is read with
+// no transcoding.
+bool LoadFile(const char *name, bool binary, std::string *buf);
+
+// Save data "buf" of length "len" bytes into a file
+// "name" returning true if successful, false otherwise.
+// If "binary" is false data is written using ifstream's
+// text mode, otherwise data is written with no
+// transcoding.
+bool SaveFile(const char *name, const char *buf, size_t len, bool binary);
+
+// Save data "buf" into file "name" returning true if
+// successful, false otherwise. If "binary" is false
+// data is written using ifstream's text mode, otherwise
+// data is written with no transcoding.
+inline bool SaveFile(const char *name, const std::string &buf, bool binary) {
+ return SaveFile(name, buf.c_str(), buf.size(), binary);
+}
+
+// Functionality for minimalistic portable path handling.
+
+// The functions below behave correctly regardless of whether posix ('/') or
+// Windows ('/' or '\\') separators are used.
+
+// Any new separators inserted are always posix.
+FLATBUFFERS_CONSTEXPR char kPathSeparator = '/';
+
+// Returns the path with the extension, if any, removed.
+std::string StripExtension(const std::string &filepath);
+
+// Returns the extension, if any.
+std::string GetExtension(const std::string &filepath);
+
+// Return the last component of the path, after the last separator.
+std::string StripPath(const std::string &filepath);
+
+// Strip the last component of the path + separator.
+std::string StripFileName(const std::string &filepath);
+
+// Concatenates a path with a filename, regardless of wether the path
+// ends in a separator or not.
+std::string ConCatPathFileName(const std::string &path,
+ const std::string &filename);
+
+// Replaces any '\\' separators with '/'
+std::string PosixPath(const char *path);
+
+// This function ensure a directory exists, by recursively
+// creating dirs for any parts of the path that don't exist yet.
+void EnsureDirExists(const std::string &filepath);
+
+// Obtains the absolute path from any other path.
+// Returns the input path if the absolute path couldn't be resolved.
+std::string AbsolutePath(const std::string &filepath);
+
+// To and from UTF-8 unicode conversion functions
+
+// Convert a unicode code point into a UTF-8 representation by appending it
+// to a string. Returns the number of bytes generated.
+inline int ToUTF8(uint32_t ucc, std::string *out) {
+ FLATBUFFERS_ASSERT(!(ucc & 0x80000000)); // Top bit can't be set.
+ // 6 possible encodings: http://en.wikipedia.org/wiki/UTF-8
+ for (int i = 0; i < 6; i++) {
+ // Max bits this encoding can represent.
+ uint32_t max_bits = 6 + i * 5 + static_cast<int>(!i);
+ if (ucc < (1u << max_bits)) { // does it fit?
+ // Remaining bits not encoded in the first byte, store 6 bits each
+ uint32_t remain_bits = i * 6;
+ // Store first byte:
+ (*out) += static_cast<char>((0xFE << (max_bits - remain_bits)) |
+ (ucc >> remain_bits));
+ // Store remaining bytes:
+ for (int j = i - 1; j >= 0; j--) {
+ (*out) += static_cast<char>(((ucc >> (j * 6)) & 0x3F) | 0x80);
+ }
+ return i + 1; // Return the number of bytes added.
+ }
+ }
+ FLATBUFFERS_ASSERT(0); // Impossible to arrive here.
+ return -1;
+}
+
+// Converts whatever prefix of the incoming string corresponds to a valid
+// UTF-8 sequence into a unicode code. The incoming pointer will have been
+// advanced past all bytes parsed.
+// returns -1 upon corrupt UTF-8 encoding (ignore the incoming pointer in
+// this case).
+inline int FromUTF8(const char **in) {
+ int len = 0;
+ // Count leading 1 bits.
+ for (int mask = 0x80; mask >= 0x04; mask >>= 1) {
+ if (**in & mask) {
+ len++;
+ } else {
+ break;
+ }
+ }
+ if ((static_cast<unsigned char>(**in) << len) & 0x80)
+ return -1; // Bit after leading 1's must be 0.
+ if (!len) return *(*in)++;
+ // UTF-8 encoded values with a length are between 2 and 4 bytes.
+ if (len < 2 || len > 4) { return -1; }
+ // Grab initial bits of the code.
+ int ucc = *(*in)++ & ((1 << (7 - len)) - 1);
+ for (int i = 0; i < len - 1; i++) {
+ if ((**in & 0xC0) != 0x80) return -1; // Upper bits must 1 0.
+ ucc <<= 6;
+ ucc |= *(*in)++ & 0x3F; // Grab 6 more bits of the code.
+ }
+ // UTF-8 cannot encode values between 0xD800 and 0xDFFF (reserved for
+ // UTF-16 surrogate pairs).
+ if (ucc >= 0xD800 && ucc <= 0xDFFF) { return -1; }
+ // UTF-8 must represent code points in their shortest possible encoding.
+ switch (len) {
+ case 2:
+ // Two bytes of UTF-8 can represent code points from U+0080 to U+07FF.
+ if (ucc < 0x0080 || ucc > 0x07FF) { return -1; }
+ break;
+ case 3:
+ // Three bytes of UTF-8 can represent code points from U+0800 to U+FFFF.
+ if (ucc < 0x0800 || ucc > 0xFFFF) { return -1; }
+ break;
+ case 4:
+ // Four bytes of UTF-8 can represent code points from U+10000 to U+10FFFF.
+ if (ucc < 0x10000 || ucc > 0x10FFFF) { return -1; }
+ break;
+ }
+ return ucc;
+}
+
+#ifndef FLATBUFFERS_PREFER_PRINTF
+// Wraps a string to a maximum length, inserting new lines where necessary. Any
+// existing whitespace will be collapsed down to a single space. A prefix or
+// suffix can be provided, which will be inserted before or after a wrapped
+// line, respectively.
+inline std::string WordWrap(const std::string in, size_t max_length,
+ const std::string wrapped_line_prefix,
+ const std::string wrapped_line_suffix) {
+ std::istringstream in_stream(in);
+ std::string wrapped, line, word;
+
+ in_stream >> word;
+ line = word;
+
+ while (in_stream >> word) {
+ if ((line.length() + 1 + word.length() + wrapped_line_suffix.length()) <
+ max_length) {
+ line += " " + word;
+ } else {
+ wrapped += line + wrapped_line_suffix + "\n";
+ line = wrapped_line_prefix + word;
+ }
+ }
+ wrapped += line;
+
+ return wrapped;
+}
+#endif // !FLATBUFFERS_PREFER_PRINTF
+
+inline bool EscapeString(const char *s, size_t length, std::string *_text,
+ bool allow_non_utf8, bool natural_utf8) {
+ std::string &text = *_text;
+ text += "\"";
+ for (uoffset_t i = 0; i < length; i++) {
+ char c = s[i];
+ switch (c) {
+ case '\n': text += "\\n"; break;
+ case '\t': text += "\\t"; break;
+ case '\r': text += "\\r"; break;
+ case '\b': text += "\\b"; break;
+ case '\f': text += "\\f"; break;
+ case '\"': text += "\\\""; break;
+ case '\\': text += "\\\\"; break;
+ default:
+ if (c >= ' ' && c <= '~') {
+ text += c;
+ } else {
+ // Not printable ASCII data. Let's see if it's valid UTF-8 first:
+ const char *utf8 = s + i;
+ int ucc = FromUTF8(&utf8);
+ if (ucc < 0) {
+ if (allow_non_utf8) {
+ text += "\\x";
+ text += IntToStringHex(static_cast<uint8_t>(c), 2);
+ } else {
+ // There are two cases here:
+ //
+ // 1) We reached here by parsing an IDL file. In that case,
+ // we previously checked for non-UTF-8, so we shouldn't reach
+ // here.
+ //
+ // 2) We reached here by someone calling GenerateText()
+ // on a previously-serialized flatbuffer. The data might have
+ // non-UTF-8 Strings, or might be corrupt.
+ //
+ // In both cases, we have to give up and inform the caller
+ // they have no JSON.
+ return false;
+ }
+ } else {
+ if (natural_utf8) {
+ // utf8 points to past all utf-8 bytes parsed
+ text.append(s + i, static_cast<size_t>(utf8 - s - i));
+ } else if (ucc <= 0xFFFF) {
+ // Parses as Unicode within JSON's \uXXXX range, so use that.
+ text += "\\u";
+ text += IntToStringHex(ucc, 4);
+ } else if (ucc <= 0x10FFFF) {
+ // Encode Unicode SMP values to a surrogate pair using two \u
+ // escapes.
+ uint32_t base = ucc - 0x10000;
+ auto high_surrogate = (base >> 10) + 0xD800;
+ auto low_surrogate = (base & 0x03FF) + 0xDC00;
+ text += "\\u";
+ text += IntToStringHex(high_surrogate, 4);
+ text += "\\u";
+ text += IntToStringHex(low_surrogate, 4);
+ }
+ // Skip past characters recognized.
+ i = static_cast<uoffset_t>(utf8 - s - 1);
+ }
+ }
+ break;
+ }
+ }
+ text += "\"";
+ return true;
+}
+
+// Remove paired quotes in a string: "text"|'text' -> text.
+std::string RemoveStringQuotes(const std::string &s);
+
+// Change th global C-locale to locale with name <locale_name>.
+// Returns an actual locale name in <_value>, useful if locale_name is "" or
+// null.
+bool SetGlobalTestLocale(const char *locale_name,
+ std::string *_value = nullptr);
+
+// Read (or test) a value of environment variable.
+bool ReadEnvironmentVariable(const char *var_name,
+ std::string *_value = nullptr);
+
+// MSVC specific: Send all assert reports to STDOUT to prevent CI hangs.
+void SetupDefaultCRTReportMode();
+
+} // namespace flatbuffers
+
+#endif // FLATBUFFERS_UTIL_H_