init

Telegram/lib_base/base/crash_report_header.cpp

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#include "base/crash_report_header.h"
+
+namespace base::details {
+namespace {
+
+std::array<char, kReportHeaderSizeLimit> Bytes;
+int Length = 0;
+
+void SafeWriteChar(char ch) {
+	if (Length < kReportHeaderSizeLimit) {
+		Bytes[Length++] = ch;
+	}
+}
+
+template <typename Type>
+void SafeWriteNumber(Type number) {
+	if constexpr (Type(-1) < Type(0)) {
+		if (number < 0) {
+			SafeWriteChar('-');
+			number = -number;
+		}
+	}
+	Type upper = 1, prev = number / 10;
+	while (prev >= upper) {
+		upper *= 10;
+	}
+	while (upper > 0) {
+		int digit = (number / upper);
+		SafeWriteChar('0' + digit);
+		number -= digit * upper;
+		upper /= 10;
+	}
+}
+
+} // namespace
+
+ReportHeaderWriter operator<<(ReportHeaderWriter, const char *str) {
+	if (str) {
+		while (const auto ch = *str++) {
+			SafeWriteChar(ch);
+		}
+	}
+	return ReportHeaderWriter();
+}
+
+ReportHeaderWriter operator<<(ReportHeaderWriter, const wchar_t *str) {
+	for (int i = 0, l = wcslen(str); i < l; ++i) {
+		if (
+#if !defined(__WCHAR_UNSIGNED__)
+			str[i] >= 0 &&
+#endif
+			str[i] < 128) {
+			SafeWriteChar(char(str[i]));
+		} else {
+			SafeWriteChar('?');
+		}
+	}
+	return ReportHeaderWriter();
+}
+
+ReportHeaderWriter operator<<(ReportHeaderWriter, int num) {
+	SafeWriteNumber(num);
+	return ReportHeaderWriter();
+}
+
+ReportHeaderWriter operator<<(ReportHeaderWriter, unsigned int num) {
+	SafeWriteNumber(num);
+	return ReportHeaderWriter();
+}
+
+ReportHeaderWriter operator<<(ReportHeaderWriter, unsigned long num) {
+	SafeWriteNumber(num);
+	return ReportHeaderWriter();
+}
+
+ReportHeaderWriter operator<<(ReportHeaderWriter, unsigned long long num) {
+	SafeWriteNumber(num);
+	return ReportHeaderWriter();
+}
+
+ReportHeaderWriter operator<<(ReportHeaderWriter, double num) {
+	if (num < 0) {
+		SafeWriteChar('-');
+		num = -num;
+	}
+	SafeWriteNumber(uint64(floor(num)));
+	SafeWriteChar('.');
+	num -= floor(num);
+	for (int i = 0; i < 4; ++i) {
+		num *= 10;
+		int digit = int(floor(num));
+		SafeWriteChar('0' + digit);
+		num -= digit;
+	}
+	return ReportHeaderWriter();
+}
+
+const char *ReportHeaderBytes() {
+	return Bytes.data();
+}
+
+int ReportHeaderLength() {
+	return Length;
+}
+
+} // namespace base::details