ydb-oss sync: add clang16-rt/ to additionalPathsToCopy

1 files changed, 255 insertions, 0 deletions

diff --git a/contrib/libs/clang16-rt/lib/scudo/standalone/string_utils.cpp b/contrib/libs/clang16-rt/lib/scudo/standalone/string_utils.cpp
new file mode 100644
index 0000000000..13fdb9c6ca
--- /dev/null
+++ b/contrib/libs/clang16-rt/lib/scudo/standalone/string_utils.cpp
@@ -0,0 +1,255 @@
+//===-- string_utils.cpp ----------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "string_utils.h"
+#include "common.h"
+
+#include <stdarg.h>
+#include <string.h>
+
+namespace scudo {
+
+static int appendChar(char **Buffer, const char *BufferEnd, char C) {
+  if (*Buffer < BufferEnd) {
+    **Buffer = C;
+    (*Buffer)++;
+  }
+  return 1;
+}
+
+// Appends number in a given Base to buffer. If its length is less than
+// |MinNumberLength|, it is padded with leading zeroes or spaces, depending
+// on the value of |PadWithZero|.
+static int appendNumber(char **Buffer, const char *BufferEnd, u64 AbsoluteValue,
+                        u8 Base, u8 MinNumberLength, bool PadWithZero,
+                        bool Negative, bool Upper) {
+  constexpr uptr MaxLen = 30;
+  RAW_CHECK(Base == 10 || Base == 16);
+  RAW_CHECK(Base == 10 || !Negative);
+  RAW_CHECK(AbsoluteValue || !Negative);
+  RAW_CHECK(MinNumberLength < MaxLen);
+  int Res = 0;
+  if (Negative && MinNumberLength)
+    --MinNumberLength;
+  if (Negative && PadWithZero)
+    Res += appendChar(Buffer, BufferEnd, '-');
+  uptr NumBuffer[MaxLen];
+  int Pos = 0;
+  do {
+    RAW_CHECK_MSG(static_cast<uptr>(Pos) < MaxLen,
+                  "appendNumber buffer overflow");
+    NumBuffer[Pos++] = static_cast<uptr>(AbsoluteValue % Base);
+    AbsoluteValue /= Base;
+  } while (AbsoluteValue > 0);
+  if (Pos < MinNumberLength) {
+    memset(&NumBuffer[Pos], 0,
+           sizeof(NumBuffer[0]) * static_cast<uptr>(MinNumberLength - Pos));
+    Pos = MinNumberLength;
+  }
+  RAW_CHECK(Pos > 0);
+  Pos--;
+  for (; Pos >= 0 && NumBuffer[Pos] == 0; Pos--) {
+    char c = (PadWithZero || Pos == 0) ? '0' : ' ';
+    Res += appendChar(Buffer, BufferEnd, c);
+  }
+  if (Negative && !PadWithZero)
+    Res += appendChar(Buffer, BufferEnd, '-');
+  for (; Pos >= 0; Pos--) {
+    char Digit = static_cast<char>(NumBuffer[Pos]);
+    Digit = static_cast<char>((Digit < 10) ? '0' + Digit
+                                           : (Upper ? 'A' : 'a') + Digit - 10);
+    Res += appendChar(Buffer, BufferEnd, Digit);
+  }
+  return Res;
+}
+
+static int appendUnsigned(char **Buffer, const char *BufferEnd, u64 Num,
+                          u8 Base, u8 MinNumberLength, bool PadWithZero,
+                          bool Upper) {
+  return appendNumber(Buffer, BufferEnd, Num, Base, MinNumberLength,
+                      PadWithZero, /*Negative=*/false, Upper);
+}
+
+static int appendSignedDecimal(char **Buffer, const char *BufferEnd, s64 Num,
+                               u8 MinNumberLength, bool PadWithZero) {
+  const bool Negative = (Num < 0);
+  const u64 UnsignedNum = (Num == INT64_MIN)
+                              ? static_cast<u64>(INT64_MAX) + 1
+                              : static_cast<u64>(Negative ? -Num : Num);
+  return appendNumber(Buffer, BufferEnd, UnsignedNum, 10, MinNumberLength,
+                      PadWithZero, Negative, /*Upper=*/false);
+}
+
+// Use the fact that explicitly requesting 0 Width (%0s) results in UB and
+// interpret Width == 0 as "no Width requested":
+// Width == 0 - no Width requested
+// Width  < 0 - left-justify S within and pad it to -Width chars, if necessary
+// Width  > 0 - right-justify S, not implemented yet
+static int appendString(char **Buffer, const char *BufferEnd, int Width,
+                        int MaxChars, const char *S) {
+  if (!S)
+    S = "<null>";
+  int Res = 0;
+  for (; *S; S++) {
+    if (MaxChars >= 0 && Res >= MaxChars)
+      break;
+    Res += appendChar(Buffer, BufferEnd, *S);
+  }
+  // Only the left justified strings are supported.
+  while (Width < -Res)
+    Res += appendChar(Buffer, BufferEnd, ' ');
+  return Res;
+}
+
+static int appendPointer(char **Buffer, const char *BufferEnd, u64 ptr_value) {
+  int Res = 0;
+  Res += appendString(Buffer, BufferEnd, 0, -1, "0x");
+  Res += appendUnsigned(Buffer, BufferEnd, ptr_value, 16,
+                        SCUDO_POINTER_FORMAT_LENGTH, /*PadWithZero=*/true,
+                        /*Upper=*/false);
+  return Res;
+}
+
+static int formatString(char *Buffer, uptr BufferLength, const char *Format,
+                        va_list Args) {
+  static const char *PrintfFormatsHelp =
+      "Supported formatString formats: %([0-9]*)?(z|ll)?{d,u,x,X}; %p; "
+      "%[-]([0-9]*)?(\\.\\*)?s; %c\n";
+  RAW_CHECK(Format);
+  RAW_CHECK(BufferLength > 0);
+  const char *BufferEnd = &Buffer[BufferLength - 1];
+  const char *Cur = Format;
+  int Res = 0;
+  for (; *Cur; Cur++) {
+    if (*Cur != '%') {
+      Res += appendChar(&Buffer, BufferEnd, *Cur);
+      continue;
+    }
+    Cur++;
+    const bool LeftJustified = *Cur == '-';
+    if (LeftJustified)
+      Cur++;
+    bool HaveWidth = (*Cur >= '0' && *Cur <= '9');
+    const bool PadWithZero = (*Cur == '0');
+    u8 Width = 0;
+    if (HaveWidth) {
+      while (*Cur >= '0' && *Cur <= '9')
+        Width = static_cast<u8>(Width * 10 + *Cur++ - '0');
+    }
+    const bool HavePrecision = (Cur[0] == '.' && Cur[1] == '*');
+    int Precision = -1;
+    if (HavePrecision) {
+      Cur += 2;
+      Precision = va_arg(Args, int);
+    }
+    const bool HaveZ = (*Cur == 'z');
+    Cur += HaveZ;
+    const bool HaveLL = !HaveZ && (Cur[0] == 'l' && Cur[1] == 'l');
+    Cur += HaveLL * 2;
+    s64 DVal;
+    u64 UVal;
+    const bool HaveLength = HaveZ || HaveLL;
+    const bool HaveFlags = HaveWidth || HaveLength;
+    // At the moment only %s supports precision and left-justification.
+    CHECK(!((Precision >= 0 || LeftJustified) && *Cur != 's'));
+    switch (*Cur) {
+    case 'd': {
+      DVal = HaveLL  ? va_arg(Args, s64)
+             : HaveZ ? va_arg(Args, sptr)
+                     : va_arg(Args, int);
+      Res += appendSignedDecimal(&Buffer, BufferEnd, DVal, Width, PadWithZero);
+      break;
+    }
+    case 'u':
+    case 'x':
+    case 'X': {
+      UVal = HaveLL  ? va_arg(Args, u64)
+             : HaveZ ? va_arg(Args, uptr)
+                     : va_arg(Args, unsigned);
+      const bool Upper = (*Cur == 'X');
+      Res += appendUnsigned(&Buffer, BufferEnd, UVal, (*Cur == 'u') ? 10 : 16,
+                            Width, PadWithZero, Upper);
+      break;
+    }
+    case 'p': {
+      RAW_CHECK_MSG(!HaveFlags, PrintfFormatsHelp);
+      Res += appendPointer(&Buffer, BufferEnd, va_arg(Args, uptr));
+      break;
+    }
+    case 's': {
+      RAW_CHECK_MSG(!HaveLength, PrintfFormatsHelp);
+      // Only left-justified Width is supported.
+      CHECK(!HaveWidth || LeftJustified);
+      Res += appendString(&Buffer, BufferEnd, LeftJustified ? -Width : Width,
+                          Precision, va_arg(Args, char *));
+      break;
+    }
+    case 'c': {
+      RAW_CHECK_MSG(!HaveFlags, PrintfFormatsHelp);
+      Res +=
+          appendChar(&Buffer, BufferEnd, static_cast<char>(va_arg(Args, int)));
+      break;
+    }
+    case '%': {
+      RAW_CHECK_MSG(!HaveFlags, PrintfFormatsHelp);
+      Res += appendChar(&Buffer, BufferEnd, '%');
+      break;
+    }
+    default: {
+      RAW_CHECK_MSG(false, PrintfFormatsHelp);
+    }
+    }
+  }
+  RAW_CHECK(Buffer <= BufferEnd);
+  appendChar(&Buffer, BufferEnd + 1, '\0');
+  return Res;
+}
+
+int formatString(char *Buffer, uptr BufferLength, const char *Format, ...) {
+  va_list Args;
+  va_start(Args, Format);
+  int Res = formatString(Buffer, BufferLength, Format, Args);
+  va_end(Args);
+  return Res;
+}
+
+void ScopedString::append(const char *Format, va_list Args) {
+  va_list ArgsCopy;
+  va_copy(ArgsCopy, Args);
+  // formatString doesn't currently support a null buffer or zero buffer length,
+  // so in order to get the resulting formatted string length, we use a one-char
+  // buffer.
+  char C[1];
+  const uptr AdditionalLength =
+      static_cast<uptr>(formatString(C, sizeof(C), Format, Args)) + 1;
+  const uptr Length = length();
+  String.resize(Length + AdditionalLength);
+  const uptr FormattedLength = static_cast<uptr>(formatString(
+      String.data() + Length, String.size() - Length, Format, ArgsCopy));
+  RAW_CHECK(data()[length()] == '\0');
+  RAW_CHECK(FormattedLength + 1 == AdditionalLength);
+  va_end(ArgsCopy);
+}
+
+void ScopedString::append(const char *Format, ...) {
+  va_list Args;
+  va_start(Args, Format);
+  append(Format, Args);
+  va_end(Args);
+}
+
+void Printf(const char *Format, ...) {
+  va_list Args;
+  va_start(Args, Format);
+  ScopedString Msg;
+  Msg.append(Format, Args);
+  outputRaw(Msg.data());
+  va_end(Args);
+}
+
+} // namespace scudo