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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
//===-- VASPrintf.cpp -------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Utility/VASPrintf.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include <assert.h>
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#include <stdarg.h>
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#include <stdio.h>
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bool lldb_private::VASprintf(llvm::SmallVectorImpl<char> &buf, const char *fmt,
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va_list args) {
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llvm::SmallString<16> error("<Encoding error>");
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bool result = true;
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// Copy in case our first call to vsnprintf doesn't fit into our buffer
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va_list copy_args;
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va_copy(copy_args, args);
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buf.resize(buf.capacity());
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// Write up to `capacity` bytes, ignoring the current size.
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int length = ::vsnprintf(buf.data(), buf.size(), fmt, args);
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if (length < 0) {
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buf = error;
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result = false;
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goto finish;
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}
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if (size_t(length) >= buf.size()) {
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// The error formatted string didn't fit into our buffer, resize it to the
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// exact needed size, and retry
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buf.resize(length + 1);
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length = ::vsnprintf(buf.data(), buf.size(), fmt, copy_args);
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if (length < 0) {
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buf = error;
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result = false;
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goto finish;
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}
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assert(size_t(length) < buf.size());
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}
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buf.resize(length);
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finish:
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va_end(args);
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va_end(copy_args);
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return result;
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}
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