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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /third_party/libwebrtc/rtc_base/string_to_number.cc | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/rtc_base/string_to_number.cc')
-rw-r--r-- | third_party/libwebrtc/rtc_base/string_to_number.cc | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/third_party/libwebrtc/rtc_base/string_to_number.cc b/third_party/libwebrtc/rtc_base/string_to_number.cc new file mode 100644 index 0000000000..1209eced44 --- /dev/null +++ b/third_party/libwebrtc/rtc_base/string_to_number.cc @@ -0,0 +1,104 @@ +/* + * Copyright 2017 The WebRTC Project Authors. All rights reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "rtc_base/string_to_number.h" + +#include <ctype.h> + +#include <cerrno> +#include <cstdlib> + +#include "rtc_base/checks.h" + +namespace rtc { +namespace string_to_number_internal { + +absl::optional<signed_type> ParseSigned(absl::string_view str, int base) { + if (str.empty()) + return absl::nullopt; + + if (isdigit(static_cast<unsigned char>(str[0])) || str[0] == '-') { + std::string str_str(str); + char* end = nullptr; + errno = 0; + const signed_type value = std::strtoll(str_str.c_str(), &end, base); + // Check for errors and also make sure that there were no embedded nuls in + // the input string. + if (end == str_str.c_str() + str_str.size() && errno == 0) { + return value; + } + } + return absl::nullopt; +} + +absl::optional<unsigned_type> ParseUnsigned(absl::string_view str, int base) { + if (str.empty()) + return absl::nullopt; + + if (isdigit(static_cast<unsigned char>(str[0])) || str[0] == '-') { + std::string str_str(str); + // Explicitly discard negative values. std::strtoull parsing causes unsigned + // wraparound. We cannot just reject values that start with -, though, since + // -0 is perfectly fine, as is -0000000000000000000000000000000. + const bool is_negative = str[0] == '-'; + char* end = nullptr; + errno = 0; + const unsigned_type value = std::strtoull(str_str.c_str(), &end, base); + // Check for errors and also make sure that there were no embedded nuls in + // the input string. + if (end == str_str.c_str() + str_str.size() && errno == 0 && + (value == 0 || !is_negative)) { + return value; + } + } + return absl::nullopt; +} + +template <typename T> +T StrToT(const char* str, char** str_end); + +template <> +inline float StrToT(const char* str, char** str_end) { + return std::strtof(str, str_end); +} + +template <> +inline double StrToT(const char* str, char** str_end) { + return std::strtod(str, str_end); +} + +template <> +inline long double StrToT(const char* str, char** str_end) { + return std::strtold(str, str_end); +} + +template <typename T> +absl::optional<T> ParseFloatingPoint(absl::string_view str) { + if (str.empty()) + return absl::nullopt; + + if (str[0] == '\0') + return absl::nullopt; + std::string str_str(str); + char* end = nullptr; + errno = 0; + const T value = StrToT<T>(str_str.c_str(), &end); + if (end == str_str.c_str() + str_str.size() && errno == 0) { + return value; + } + return absl::nullopt; +} + +template absl::optional<float> ParseFloatingPoint(absl::string_view str); +template absl::optional<double> ParseFloatingPoint(absl::string_view str); +template absl::optional<long double> ParseFloatingPoint(absl::string_view str); + +} // namespace string_to_number_internal +} // namespace rtc |